/* ============================
   NeuroScope - EEG Analysis Platform
   Color Scheme: Clinical ink, signal blue, teal, and data-spectrum accents
   ============================ */

:root {
    --primary: #315AEF;
    --primary-light: #5277F4;
    --primary-dark: #2546C7;
    --primary-bg: #E9EEFF;
    --primary-bg-subtle: #F4F6FF;
    --accent: #0E8E9D;
    --accent-bg: #E3F5F4;
    --navy: #10243E;
    --navy-deep: #0B1730;
    --navy-raised: #173353;
    --blue-soft: #76A7FF;
    --white: #FFFFFF;
    --bg: #F2F5F8;
    --text: #14233A;
    --text-secondary: #506176;
    --text-muted: #687A8F;
    --border: #D3DDE8;
    --border-light: #E4EAF1;
    --surface-muted: #EAF0F5;
    --success: #0F8A5F;
    --warning: #B36A00;
    --danger: #C73E4D;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 50px rgba(0,0,0,0.1);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 16px;
    --transition: 180ms cubic-bezier(0.22, 1, 0.36, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --z-dropdown: 1100;
    --z-sticky: 1200;
    --z-toast: 1800;
    --z-loader: 2200;

    --delta-color: #8B5CF6;
    --theta-color: #06B6D4;
    --alpha-color: #10B981;
    --beta-color: #F59E0B;
    --gamma-color: #EF4444;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}
svg [stroke="#4A90D9"],
svg[stroke="#4A90D9"] {
    stroke: var(--primary);
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ============================
   Loading Screen
   ============================ */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--navy-deep);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loader);
    color: #FFFFFF;
    transition: opacity 180ms ease, visibility 180ms ease;
}
.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.loader-content {
    width: min(360px, calc(100vw - 48px));
    text-align: center;
}
.brain-pulse svg {
    animation: pulse 2s ease-in-out infinite;
}
.wave-path {
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
    animation: drawWave 1.5s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}
@keyframes drawWave {
    0% { stroke-dashoffset: 200; }
    50% { stroke-dashoffset: 0; }
    100% { stroke-dashoffset: -200; }
}
.loader-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: #FFFFFF;
    margin-top: 16px;
    letter-spacing: -0.02em;
}
.loader-subtitle {
    color: #C4D3E8;
    font-size: 0.9rem;
    margin-top: 4px;
}
.loader-progress-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 22px;
    color: #DCE7F7;
    font-size: 0.72rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
#loader-stage {
    overflow: hidden;
    text-align: left;
    text-overflow: ellipsis;
    white-space: nowrap;
}
#loader-progress-value {
    color: var(--blue-soft);
}
.loader-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.14);
    border-radius: 999px;
    margin: 8px auto 0;
    overflow: hidden;
}
.loader-bar-inner {
    height: 100%;
    width: var(--loader-progress, 0%);
    background: var(--blue-soft);
    border-radius: inherit;
    transition: width 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

/* ============================
   Header
   ============================ */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
    transition: box-shadow var(--transition);
}
.main-header.scrolled {
    box-shadow: var(--shadow-sm);
}
.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 200px;
}
.header-right {
    justify-content: flex-end;
}
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: opacity var(--transition);
}
.logo:hover { opacity: 0.8; }
.logo-text {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.03em;
}

.header-nav {
    display: none;
    gap: 2px;
    align-items: center;
}
.header-nav.visible {
    display: flex;
}
.nav-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.82rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.nav-btn:hover {
    background: var(--primary-bg);
    color: var(--primary);
}
.nav-btn.active {
    background: var(--primary-bg);
    color: var(--primary);
    font-weight: 600;
}
.nav-btn svg {
    flex-shrink: 0;
}

.btn-header {
    display: none;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.82rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}
.btn-header.visible {
    display: flex;
}
.btn-header:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg-subtle);
}
.file-badge {
    display: none;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 500;
    max-width: 200px;
}
.file-badge.visible {
    display: flex;
}
.file-badge span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ============================
   Upload Section
   ============================ */
.upload-section {
    padding-top: 56px;
    min-height: 100vh;
}
.upload-section.hidden {
    display: none;
}
.upload-hero {
    position: relative;
    padding: 60px 20px 40px;
    text-align: center;
    overflow: hidden;
}
.hero-bg-pattern {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(74,144,217,0.06) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(74,144,217,0.04) 0%, transparent 50%),
        radial-gradient(circle at 50% 0%, rgba(74,144,217,0.08) 0%, transparent 40%);
    pointer-events: none;
}
.hero-content {
    position: relative;
    z-index: 1;
}
.hero-icon {
    margin-bottom: 20px;
    animation: float 4s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}
.hero-title {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.04em;
    margin-bottom: 8px;
}
.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
    font-weight: 400;
}

.upload-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 20px 40px;
}
.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-xl);
    padding: 50px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--white);
    position: relative;
}
.upload-area:hover, .upload-area.drag-over {
    border-color: var(--primary);
    background: var(--primary-bg-subtle);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}
.upload-area.drag-over {
    border-style: solid;
}
.upload-icon-area {
    margin-bottom: 16px;
    opacity: 0.7;
}
.upload-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
}
.upload-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
}
.format-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-top: 20px;
}
.badge {
    padding: 3px 10px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.72rem;
    font-weight: 600;
    border-radius: 12px;
    letter-spacing: 0.03em;
}

.upload-progress {
    display: none;
    margin-top: 24px;
    position: relative;
}
.upload-progress.active {
    display: block;
}
.upload-progress-bar {
    height: 4px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}
.upload-progress-bar::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 0%;
    background: var(--primary);
    border-radius: 4px;
}
.upload-progress-bar.indeterminate::after {
    width: 30%;
    animation: indeterminate 1.5s ease-in-out infinite;
}
@keyframes indeterminate {
    0% { left: -30%; }
    100% { left: 100%; }
}
#upload-progress-text {
    display: block;
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

.upload-divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 24px 0;
    color: var(--text-muted);
    font-size: 0.85rem;
}
.upload-divider::before, .upload-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.btn-sample {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 24px;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
}
.btn-sample:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg-subtle);
    box-shadow: var(--shadow-sm);
}

.features-section {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px 60px;
}
.features-heading {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 32px;
    letter-spacing: -0.02em;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}
.feature-card {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: all 0.3s ease;
}
.feature-card:hover {
    border-color: var(--primary-bg);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}
.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}
.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}
.feature-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================
   Dashboard
   ============================ */
.dashboard {
    display: none;
    padding-top: 56px;
    height: 100vh;
}
.dashboard.visible {
    display: flex;
}

/* Sidebar */
.sidebar {
    width: 260px;
    min-width: 260px;
    height: calc(100vh - 56px);
    background: var(--white);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.sidebar-section {
    background: var(--bg);
    border-radius: var(--radius-md);
    padding: 14px;
}
.sidebar-section h3 {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 10px;
}
.sidebar-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}
.sidebar-section-header h3 {
    margin-bottom: 0;
}
.channel-actions {
    display: flex;
    gap: 4px;
}
.btn-tiny {
    padding: 2px 8px;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
}
.btn-tiny:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.channel-list {
    max-height: 280px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.channel-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition);
    font-size: 0.82rem;
}
.channel-select-label {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    flex: 1;
    cursor: pointer;
}
.channel-bad-toggle {
    width: 22px;
    height: 22px;
    flex: 0 0 auto;
    border: 0;
    border-radius: 4px;
    background: transparent;
    color: var(--text-muted);
    font: 700 0.72rem/1 var(--font);
    cursor: pointer;
}
.channel-bad-toggle:hover {
    background: #FCECEF;
    color: var(--danger);
}
.channel-bad-toggle[aria-pressed="true"] {
    background: #F9DDE3;
    color: #A51D35;
}
.channel-item.is-bad .ch-name {
    color: #A51D35;
    text-decoration: line-through;
    text-decoration-thickness: 1px;
}
.channel-item:hover {
    background: var(--white);
}
.channel-item input[type="checkbox"] {
    accent-color: var(--primary);
    cursor: pointer;
}
.channel-item .ch-color {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}
.channel-item .ch-name {
    font-weight: 500;
    color: var(--text);
}

.control-group {
    margin-bottom: 12px;
}
.control-group:last-child {
    margin-bottom: 0;
}
.control-group label {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 4px;
}
.control-group.inline {
    display: inline-flex;
    flex-direction: column;
    margin-right: 12px;
    margin-bottom: 8px;
}
.range-row {
    display: flex;
    align-items: center;
    gap: 8px;
}
.range-value {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--primary);
    min-width: 38px;
    text-align: right;
}
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--border);
    border-radius: 4px;
    outline: none;
    cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    border: 2px solid var(--white);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform var(--transition);
}
input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
}
.info-label {
    color: var(--text-secondary);
}
.info-value {
    font-weight: 600;
    color: var(--text);
}

/* Main Content */
.main-content {
    flex: 1;
    height: calc(100vh - 56px);
    overflow-y: auto;
    padding: 20px;
    background: var(--bg);
}
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}
.tab-content.active {
    display: block;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}
.tab-header {
    margin-bottom: 20px;
}
.tab-header h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}
.tab-header p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Buttons */
.btn-primary {
    padding: 8px 20px;
    background: var(--primary);
    color: var(--white);
    border: none;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}
.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: var(--shadow-sm);
}
.btn-secondary {
    padding: 8px 20px;
    background: var(--white);
    color: var(--primary);
    border: 1px solid var(--primary);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}
.btn-secondary:hover {
    background: var(--primary-bg-subtle);
}
.btn-ghost {
    padding: 8px 20px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}
.btn-ghost:hover {
    border-color: var(--text-muted);
    color: var(--text);
}

/* Toolbar */
.viewer-toolbar, .spectrum-controls, .band-controls,
.filter-controls, .timefreq-controls, .topo-controls, .stats-controls {
    display: flex;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 8px;
    padding: 12px 16px;
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
}
.btn-tool {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.78rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}
.btn-tool:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-bg-subtle);
}
.toolbar-separator {
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 4px;
}
.toolbar-label {
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-right: 4px;
    align-self: center;
}
.toolbar-select {
    padding: 6px 10px;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.82rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    outline: none;
    transition: border-color var(--transition);
}
.toolbar-select:focus {
    border-color: var(--primary);
}
.toolbar-input {
    padding: 6px 10px;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--text);
    font-family: var(--font);
    font-size: 0.82rem;
    border-radius: var(--radius-sm);
    width: 80px;
    outline: none;
    transition: border-color var(--transition);
}
.toolbar-input:focus {
    border-color: var(--primary);
}

/* Canvas Container */
.canvas-container {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 16px;
    position: relative;
    overflow: hidden;
}
.canvas-container canvas {
    width: 100%;
    display: block;
}
#viewer-canvas-container {
    position: relative;
    min-height: 500px;
}
#viewer-canvas {
    width: 100%;
    height: 500px;
}
.canvas-labels {
    position: absolute;
    left: 0;
    top: 16px;
    bottom: 16px;
    width: 70px;
    pointer-events: none;
}
.canvas-label {
    position: absolute;
    left: 8px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    transform: translateY(-50%);
    white-space: nowrap;
}

/* Chart containers */
.chart-container {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 16px;
}
.chart-container canvas {
    width: 100% !important;
    max-height: 400px;
}
.chart-half {
    display: inline-block;
    width: calc(50% - 8px);
    vertical-align: top;
}
.chart-half:nth-child(even) {
    margin-left: 16px;
}

/* Band Power */
.band-control-bar {
    width: 100%;
    align-items: flex-end;
}
.band-control-copy {
    display: flex;
    flex: 1 1 300px;
    flex-direction: column;
    justify-content: center;
    min-height: 36px;
    margin-right: 12px;
}
.band-control-copy strong {
    color: var(--text);
    font-size: 0.82rem;
    font-weight: 650;
}
.band-control-copy span {
    margin-top: 1px;
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-variant-numeric: tabular-nums;
}
.band-empty-state {
    display: flex;
    align-items: center;
    gap: 16px;
    min-height: 160px;
    padding: 28px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--primary);
}
.band-empty-state h3 {
    color: var(--text);
    font-size: 0.98rem;
    font-weight: 650;
}
.band-empty-state p {
    max-width: 68ch;
    margin-top: 4px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-wrap: pretty;
}
.band-results[hidden],
.band-empty-state[hidden] {
    display: none;
}
.band-profile-panel {
    padding: 20px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}
.band-profile-heading,
.band-results-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
}
.band-profile-heading {
    margin-bottom: 14px;
}
.band-profile-heading h3,
.band-results-heading h3 {
    font-size: 0.94rem;
    font-weight: 650;
}
.band-profile-heading h3 {
    color: var(--text);
}
.band-profile-heading p,
.band-results-heading p {
    margin-top: 2px;
    font-size: 0.74rem;
}
.band-profile-heading p {
    color: var(--text-secondary);
}
#band-profile-unit {
    flex: 0 0 auto;
    padding: 4px 9px;
    background: var(--primary-bg);
    border-radius: 999px;
    color: var(--primary-dark);
    font-size: 0.72rem;
    font-weight: 700;
}
.bands-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}
.band-card {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    column-gap: 8px;
    padding: 13px 14px;
    background: #F8FAFC;
    border-right: 1px solid var(--border);
    text-align: left;
}
.band-card:last-child {
    border-right: 0;
}
.band-dot {
    grid-row: 1 / 3;
    width: 9px;
    height: 28px;
    border-radius: 999px;
}
.band-card.delta .band-dot { background: var(--delta-color); }
.band-card.theta .band-dot { background: var(--theta-color); }
.band-card.alpha .band-dot { background: var(--alpha-color); }
.band-card.beta .band-dot { background: var(--beta-color); }
.band-card.gamma .band-dot { background: var(--gamma-color); }
.band-card h4,
.band-range {
    grid-column: 2;
}
.band-card h4 {
    color: var(--text);
    font-size: 0.8rem;
    font-weight: 650;
}
.band-range {
    display: block;
    color: var(--text-muted);
    font-size: 0.66rem;
}
.band-value {
    grid-column: 1 / -1;
    display: block;
    margin-top: 8px;
    color: var(--text);
    font-size: 1rem;
    font-weight: 750;
    font-variant-numeric: tabular-nums;
}
.band-run-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin-top: 14px;
    border-top: 1px solid var(--border-light);
}
.band-run-summary > div {
    min-width: 0;
    padding: 12px 14px 0 0;
}
.band-run-summary dt {
    color: var(--text-muted);
    font-size: 0.67rem;
    font-weight: 600;
}
.band-run-summary dd {
    overflow: hidden;
    margin: 2px 0 0;
    color: var(--text);
    font-size: 0.78rem;
    font-weight: 650;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.band-results-surface {
    margin-top: 16px;
    padding: 20px;
    background: var(--surface-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}
.band-results-heading {
    margin-bottom: 14px;
}
.band-results-heading h3 {
    color: var(--text);
}
.band-results-heading p {
    max-width: 72ch;
    color: var(--text-secondary);
}
.band-results-heading > span {
    flex: 0 0 auto;
    color: var(--text-secondary);
    font-size: 0.68rem;
    font-weight: 650;
}
.band-chart-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.7fr) minmax(260px, 0.8fr);
    gap: 12px;
}
.band-chart-panel {
    min-width: 0;
    margin: 0;
    border: 0;
}
.band-chart-panel figcaption {
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 650;
}

/* Filtering */
.filter-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--primary-bg-subtle);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}
.filter-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #94A3B8;
    flex-shrink: 0;
}
.filter-status.active-filter {
    background: #ECFDF5;
    border-color: #A7F3D0;
    color: #065F46;
}
.filter-status.active-filter .filter-status-dot {
    background: #10B981;
}
.filter-type-cards {
    display: flex;
    gap: 4px;
    margin-right: 16px;
}
.filter-type-btn {
    padding: 6px 16px;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.82rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}
.filter-type-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}
.filter-type-btn:hover {
    border-color: var(--primary);
}
.filter-params {
    display: flex;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 4px;
}
.filter-actions {
    display: flex;
    gap: 8px;
    margin-left: auto;
}
.filter-canvas-row {
    display: flex;
    gap: 16px;
    margin-top: 0;
}
.filter-compare-container {
    flex: 3;
    min-height: 360px;
    position: relative;
}
.filter-response-container {
    flex: 2;
    min-height: 360px;
}
.filter-canvas-title {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}
#filter-canvas {
    width: 100%;
    height: 320px;
}
#filter-response-canvas {
    width: 100%;
    height: 320px;
}
.processing-overlay .processing-text {
    margin-left: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}
@media (max-width: 1100px) {
    .filter-canvas-row {
        flex-direction: column;
    }
}

/* Spectrogram */
.spectrogram-container {
    position: relative;
    min-height: 350px;
}
#spectrogram-canvas {
    width: calc(100% - 60px);
    height: 300px;
}
.colorbar-canvas {
    position: absolute;
    right: 16px;
    top: 16px;
    width: 30px;
    height: 300px;
}

/* Statistics */
.stats-table-wrap {
    overflow-x: auto;
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}
.stats-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}
.stats-table th {
    background: var(--primary-bg);
    color: var(--primary-dark);
    font-weight: 600;
    padding: 10px 14px;
    text-align: left;
    white-space: nowrap;
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
}
.stats-table td {
    padding: 8px 14px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text);
}
.stats-table tr:hover td {
    background: var(--primary-bg-subtle);
}
.stats-table td:first-child {
    font-weight: 600;
    color: var(--primary);
}
.stats-charts {
    display: flex;
    gap: 16px;
}
.stats-charts .chart-container {
    flex: 1;
}
.quality-review {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px 20px;
    margin-bottom: 16px;
    padding: 16px;
    background: var(--accent-bg);
    border-radius: var(--radius-md);
}
.quality-review-copy h3 {
    color: var(--text);
    font-size: 0.9rem;
}
.quality-review-copy p {
    max-width: 72ch;
    margin-top: 3px;
    color: #3D6268;
    font-size: 0.75rem;
}
.quality-review-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}
.quality-summary,
.quality-table-wrap {
    grid-column: 1 / -1;
}
.quality-summary {
    color: #315C63;
    font-size: 0.74rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.quality-table-wrap {
    overflow-x: auto;
    background: #FFFFFF;
    border-radius: var(--radius-sm);
}
.quality-table-wrap[hidden] {
    display: none;
}
.quality-flagged td {
    background: #FFF3F5;
}
.quality-flagged td:last-child {
    color: #A51D35;
    font-weight: 600;
}
@media (max-width: 768px) {
    .quality-review {
        grid-template-columns: 1fr;
    }
    .quality-review-actions {
        align-items: stretch;
        flex-direction: column;
    }
}

/* Topography */
.topo-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 30px;
}
#topo-canvas {
    border-radius: var(--radius-md);
}
#topo-colorbar {
    position: static;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
}

/* Export */
.export-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
}
.export-card {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}
.export-card:hover {
    border-color: var(--primary-bg);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.export-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}
.export-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}
.export-card p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.5;
    flex: 1;
}
.btn-export {
    padding: 8px 20px;
    background: var(--primary-bg);
    color: var(--primary);
    border: none;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    width: 100%;
    margin-top: auto;
}
.btn-export:hover {
    background: var(--primary);
    color: var(--white);
}

/* Export extras */
.export-time-range {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}
.export-range-sep {
    font-size: 0.8rem;
    color: var(--text-muted);
}
.export-range-unit {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Toolbar time display */
.toolbar-time-display {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-bg);
    padding: 4px 12px;
    border-radius: 12px;
    white-space: nowrap;
    align-self: center;
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.toast {
    padding: 12px 20px;
    background: var(--text);
    color: var(--white);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease;
    min-width: 260px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.toast.success { background: #059669; }
.toast.error { background: #DC2626; }
.toast.info { background: var(--primary); }
.toast.removing {
    animation: toastOut 0.3s ease forwards;
}
@keyframes toastIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}
@keyframes toastOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

/* Responsive */
@media (max-width: 1100px) {
    .nav-btn span { display: none; }
    .nav-btn { padding: 6px 8px; }
    .bands-grid { grid-template-columns: repeat(3, 1fr); }
    .chart-half {
        display: block;
        width: 100%;
    }
    .chart-half:nth-child(even) {
        margin-left: 0;
    }
}

/* Processing overlay */
.processing-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    border-radius: var(--radius-md);
}
.processing-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============================
   Mobile Hamburger (hidden on desktop)
   ============================ */
.mobile-sidebar-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition);
    flex-shrink: 0;
}
.mobile-sidebar-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Mobile sidebar overlay (hidden on desktop) */
.mobile-sidebar-overlay {
    display: none;
}

/* Mobile bottom nav (hidden on desktop) */
.mobile-bottom-nav {
    display: none;
}

/* Mobile more menu (hidden on desktop) */
.mobile-more-menu {
    display: none;
}

/* ============================
   Mobile Responsive (<= 768px)
   ============================ */
@media (max-width: 768px) {
    /* --- Header --- */
    .main-header {
        height: 50px;
        padding: 0 12px;
    }
    .header-left, .header-right {
        min-width: auto;
        gap: 8px;
    }
    .mobile-sidebar-toggle {
        display: flex;
    }
    .logo-text {
        font-size: 1rem;
    }
    /* Hide desktop nav on mobile */
    .header-nav {
        display: none !important;
    }
    .btn-header span {
        display: none;
    }
    .btn-header {
        padding: 6px 8px;
    }
    .file-badge {
        max-width: 120px;
        font-size: 0.7rem;
        padding: 3px 8px;
    }

    /* --- Mobile Sidebar Overlay --- */
    .mobile-sidebar-overlay {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: 1999;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }
    .mobile-sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }

    /* --- Sidebar as mobile drawer --- */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 280px;
        min-width: 280px;
        height: 100vh;
        height: 100dvh;
        z-index: 2000;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        padding-top: 16px;
        box-shadow: none;
    }
    .sidebar.mobile-open {
        transform: translateX(0);
        box-shadow: var(--shadow-xl);
    }

    /* --- Dashboard reformatted --- */
    .dashboard {
        padding-top: 50px;
        height: auto;
        min-height: 100vh;
        min-height: 100dvh;
    }
    .dashboard.visible {
        display: block;
    }

    /* --- Main content full width --- */
    .main-content {
        width: 100%;
        height: auto;
        min-height: calc(100vh - 50px - 60px);
        min-height: calc(100dvh - 50px - 60px);
        padding: 14px 10px 80px;
        overflow-y: auto;
    }

    /* --- Upload section --- */
    .upload-section {
        padding-top: 50px;
    }
    .upload-hero {
        padding: 32px 16px 24px;
    }
    .hero-title {
        font-size: 1.6rem;
    }
    .hero-desc {
        font-size: 0.95rem;
    }
    .hero-icon svg {
        width: 48px;
        height: 48px;
    }
    .upload-container {
        padding: 0 14px 30px;
    }
    .upload-area {
        padding: 30px 20px;
        border-radius: var(--radius-lg);
    }
    .upload-title {
        font-size: 1.1rem;
    }
    .features-section {
        padding: 24px 14px 40px;
    }
    .features-heading {
        font-size: 1.15rem;
    }
    .features-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .feature-card {
        padding: 20px 18px;
    }

    /* --- Tab content --- */
    .tab-header h2 {
        font-size: 1.15rem;
    }
    .tab-header p {
        font-size: 0.82rem;
    }

    /* --- Signal Viewer --- */
    #viewer-canvas-container {
        min-height: 350px;
    }
    #viewer-canvas {
        height: 350px;
    }
    .viewer-toolbar {
        flex-wrap: wrap;
        gap: 6px;
        padding: 8px 10px;
    }
    .toolbar-separator {
        display: none;
    }
    .toolbar-label {
        font-size: 0.72rem;
    }
    .toolbar-select {
        font-size: 0.78rem;
        padding: 5px 6px;
    }
    .toolbar-time-display {
        font-size: 0.72rem;
        padding: 3px 8px;
    }

    /* --- Spectrum / Band / Filter / TimeFreq controls --- */
    .spectrum-controls, .band-controls,
    .filter-controls, .timefreq-controls,
    .topo-controls, .stats-controls {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        padding: 10px 12px;
    }
    .control-group.inline {
        display: flex;
        width: 100%;
        margin-right: 0;
    }
    .control-group.inline .toolbar-select,
    .control-group.inline .toolbar-input {
        width: 100%;
    }
    .btn-primary, .btn-secondary, .btn-ghost {
        width: 100%;
        text-align: center;
    }

    /* --- Band Power --- */
    .bands-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    .band-card {
        padding: 12px 10px;
    }
    .band-card h4 {
        font-size: 0.88rem;
    }
    .band-value {
        font-size: 1rem;
    }

    /* --- Charts --- */
    .chart-half {
        display: block;
        width: 100%;
    }
    .chart-half:nth-child(even) {
        margin-left: 0;
    }
    .chart-container {
        padding: 12px;
    }
    .chart-container canvas {
        max-height: 280px;
    }

    /* --- Filter --- */
    .filter-type-cards {
        flex-wrap: wrap;
        gap: 6px;
        margin-right: 0;
    }
    .filter-type-btn {
        flex: 1;
        min-width: 0;
        text-align: center;
        padding: 8px 10px;
        font-size: 0.78rem;
    }
    .filter-params {
        flex-direction: column;
        gap: 8px;
    }
    .filter-actions {
        flex-direction: column;
        margin-left: 0;
        gap: 6px;
    }
    .filter-canvas-row {
        flex-direction: column;
        gap: 12px;
    }
    .filter-compare-container,
    .filter-response-container {
        min-height: 250px;
    }
    #filter-canvas,
    #filter-response-canvas {
        height: 220px;
    }

    /* --- Spectrogram --- */
    .spectrogram-container {
        min-height: 250px;
    }
    #spectrogram-canvas {
        width: calc(100% - 45px);
        height: 220px;
    }
    .colorbar-canvas {
        width: 24px;
        height: 220px;
        right: 10px;
    }

    /* --- Statistics --- */
    .stats-table-wrap {
        -webkit-overflow-scrolling: touch;
    }
    .stats-table th, .stats-table td {
        padding: 6px 8px;
        font-size: 0.75rem;
    }
    .stats-charts {
        flex-direction: column;
    }

    /* --- Topography --- */
    .topo-display {
        flex-direction: column;
        padding: 16px;
        gap: 12px;
    }
    #topo-canvas {
        width: 100%;
        max-width: 320px;
        height: auto;
    }
    #topo-colorbar {
        width: 280px;
        height: 24px;
    }

    /* --- Export --- */
    .export-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .export-card {
        padding: 20px 16px;
    }

    /* --- Toast --- */
    .toast-container {
        bottom: 72px;
        right: 12px;
        left: 12px;
    }
    .toast {
        min-width: auto;
        font-size: 0.8rem;
        padding: 10px 14px;
    }

    /* --- Mobile Bottom Navigation --- */
    .mobile-bottom-nav {
        display: none;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 60px;
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-top: 1px solid var(--border);
        z-index: 1500;
        align-items: center;
        justify-content: space-around;
        padding: 0 4px;
        padding-bottom: env(safe-area-inset-bottom, 0px);
    }
    .mobile-bottom-nav.visible {
        display: flex;
    }
    .mobile-nav-btn {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2px;
        padding: 6px 4px;
        background: none;
        border: none;
        color: var(--text-muted);
        font-family: var(--font);
        font-size: 0.62rem;
        font-weight: 500;
        cursor: pointer;
        transition: color var(--transition);
        min-width: 0;
        flex: 1;
    }
    .mobile-nav-btn.active {
        color: var(--primary);
    }
    .mobile-nav-btn svg {
        flex-shrink: 0;
    }

    /* --- Mobile more menu --- */
    .mobile-more-menu {
        position: fixed;
        bottom: 68px;
        right: 8px;
        background: var(--white);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-lg);
        z-index: 1600;
        padding: 6px;
        min-width: 160px;
        flex-direction: column;
        gap: 2px;
        /* hidden by default, shown via JS */
        display: none;
    }
    .mobile-more-menu.visible {
        display: flex;
    }
    .mobile-more-item {
        display: block;
        width: 100%;
        padding: 10px 14px;
        background: none;
        border: none;
        color: var(--text);
        font-family: var(--font);
        font-size: 0.88rem;
        font-weight: 500;
        text-align: left;
        border-radius: var(--radius-sm);
        cursor: pointer;
        transition: background var(--transition);
    }
    .mobile-more-item:hover,
    .mobile-more-item.active {
        background: var(--primary-bg);
        color: var(--primary);
    }

    /* Add safe-area padding for notched phones */
    .main-content {
        padding-bottom: calc(80px + env(safe-area-inset-bottom, 0px));
    }
}

/* ============================
   Very small screens (<= 380px)
   ============================ */
@media (max-width: 380px) {
    .hero-title {
        font-size: 1.3rem;
    }
    .hero-desc {
        font-size: 0.85rem;
    }
    .upload-area {
        padding: 24px 14px;
    }
    .upload-title {
        font-size: 1rem;
    }
    .bands-grid {
        grid-template-columns: 1fr;
    }
    .mobile-nav-btn span {
        font-size: 0.58rem;
    }
    .sidebar {
        width: 260px;
        min-width: 260px;
    }
    .tab-header h2 {
        font-size: 1rem;
    }
}

/* ============================
   NeuroScope workstation foundation
   ============================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:where(button, input, select, [tabindex]):focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.28);
    outline-offset: 2px;
}

.main-header {
    background: #10243E;
    border-bottom-color: #203A59;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}
.header-left,
.header-right {
    min-width: 170px;
}
.logo svg circle,
.logo svg path {
    stroke: #76A7FF;
}
.logo-text {
    color: #FFFFFF;
}
.nav-btn {
    color: #B8C8D9;
}
.nav-btn:hover {
    background: #1A3655;
    color: #FFFFFF;
}
.nav-btn.active {
    background: #E8F0FF;
    color: #1649B8;
}
.btn-header,
.file-badge {
    background: #183451;
    border-color: #36516E;
    color: #EAF2FA;
}
.btn-header {
    flex: 0 0 auto;
    white-space: nowrap;
}
.btn-header:hover {
    background: #244565;
    border-color: #527292;
    color: #FFFFFF;
}
.shortcut-btn {
    width: 30px;
    height: 30px;
    border: 1px solid #36516E;
    border-radius: var(--radius-sm);
    background: #183451;
    color: #DCE8F5;
    font: 700 0.82rem/1 var(--font);
    cursor: pointer;
}
.shortcut-btn:hover {
    border-color: #6E8BAB;
    color: #FFFFFF;
}

.workspace-status {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    z-index: 900;
    min-height: 36px;
    display: none;
    align-items: center;
    gap: 0;
    padding: 0 18px;
    background: #FFFFFF;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    overflow-x: auto;
}
.workspace-status.visible {
    display: flex;
}
.workspace-status-item {
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
    min-width: max-content;
    padding: 0 16px;
    border-right: 1px solid var(--border-light);
    font-variant-numeric: tabular-nums;
}
.workspace-status-item:first-child {
    padding-left: 0;
}
.status-label {
    color: var(--text-muted);
    font-size: 0.68rem;
    font-weight: 600;
}
.workspace-status-item strong {
    color: var(--text);
    font-size: 0.74rem;
    font-weight: 650;
}
.workspace-status-source {
    margin-left: auto;
    border-right: 0;
    border-left: 1px solid var(--border-light);
}

.dashboard {
    padding-top: 92px;
}
.sidebar,
.main-content {
    height: calc(100vh - 92px);
}
.sidebar {
    width: 276px;
    min-width: 276px;
    padding: 14px;
    background: #FFFFFF;
}
.sidebar-section {
    padding: 14px;
    background: var(--surface-muted);
    border-radius: var(--radius-md);
}
.sidebar-section h3 {
    color: #435970;
    text-transform: none;
    letter-spacing: 0;
}
.channel-search-wrap {
    position: relative;
    display: flex;
    align-items: center;
    margin-bottom: 8px;
}
.channel-search {
    width: 100%;
    height: 34px;
    padding: 7px 54px 7px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: #FFFFFF;
    color: var(--text);
    font: inherit;
    font-size: 0.78rem;
}
.channel-selection-count {
    position: absolute;
    right: 8px;
    color: var(--text-muted);
    font-size: 0.68rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.channel-item[hidden] {
    display: none;
}
.channel-item:hover {
    background: #FFFFFF;
}
.display-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 12px;
}
.display-options label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 600;
}
.display-options .toolbar-select {
    width: 100%;
    min-width: 0;
}
.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 10px;
    color: var(--text-secondary);
    font-size: 0.74rem;
    font-weight: 600;
}
.toggle-row input {
    accent-color: var(--primary);
}
.main-content {
    padding: 22px 24px 36px;
}
.tab-header {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 16px;
}
.tab-header h2 {
    font-size: 1.5rem;
}
.tab-header p {
    max-width: 70ch;
}
.canvas-container,
.chart-container,
.stats-table-wrap,
.topo-display {
    border-color: var(--border);
    box-shadow: none;
}
.btn-primary,
.btn-secondary,
.btn-ghost,
.btn-tool,
.btn-export,
.toolbar-input,
.toolbar-select {
    border-radius: var(--radius-sm);
}
.btn-primary:active,
.btn-secondary:active,
.btn-tool:active,
.btn-export:active {
    transform: translateY(1px);
}
.btn-tool-accent {
    margin-left: auto;
    width: auto;
    min-width: max-content;
    background: var(--primary);
    border-color: var(--primary);
    color: #FFFFFF;
    padding-inline: 12px;
    white-space: nowrap;
}
#viewer-fit {
    width: auto;
    min-width: max-content;
    padding-inline: 10px;
    white-space: nowrap;
}
.btn-tool-accent:hover {
    background: var(--primary-dark);
    color: #FFFFFF;
}
.toolbar-time-display {
    border-radius: var(--radius-sm);
    font-variant-numeric: tabular-nums;
}
.note-navigation {
    display: inline-flex;
    gap: 4px;
}
.note-navigation .btn-tool {
    width: auto;
    min-width: 84px;
    padding-inline: 9px;
    white-space: nowrap;
}

.format-note {
    max-width: 440px;
    margin: 10px auto 0;
    color: var(--text-secondary);
    font-size: 0.74rem;
    line-height: 1.45;
}
.privacy-note {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    max-width: 520px;
    margin: 18px auto 0;
    padding: 12px 14px;
    background: #EAF7F1;
    color: #155A43;
    border-radius: var(--radius-md);
    font-size: 0.78rem;
    line-height: 1.5;
    text-align: left;
}
.privacy-note svg {
    flex: 0 0 auto;
    margin-top: 1px;
}
.sample-data-attribution {
    max-width: 520px;
    margin: 10px auto 0;
    color: var(--text-secondary);
    font-size: 0.75rem;
    line-height: 1.5;
    text-align: center;
}
.sample-data-attribution a {
    color: var(--primary-dark);
}
.upload-hero {
    padding-top: 72px;
}
.hero-title {
    max-width: 760px;
    margin-inline: auto;
    font-size: 2.75rem;
    letter-spacing: -0.035em;
    text-wrap: balance;
}
.hero-desc {
    max-width: 650px;
    margin-top: 12px;
    text-wrap: pretty;
}
.upload-area {
    border-radius: var(--radius-lg);
}
.upload-area:hover,
.upload-area.drag-over {
    box-shadow: 0 2px 8px rgba(16, 36, 62, 0.08);
}

.annotation-workbench {
    margin: 0;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
}
.annotation-count {
    padding: 3px 8px;
    background: var(--surface-muted);
    border-radius: 999px;
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
}
.annotation-header-tools {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}
.annotation-row-actions {
    display: flex;
    align-items: center;
    gap: 6px;
}
.annotation-filter {
    min-height: 30px;
    padding-block: 5px;
    font-size: 0.72rem;
}
.annotation-form {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: start;
    gap: 10px;
    margin-top: 14px;
    padding: 12px;
    background: var(--surface-muted);
    border-radius: var(--radius-md);
}
.annotation-form[hidden] {
    display: none;
}
.annotation-form label {
    display: flex;
    flex-direction: column;
    grid-column: span 3;
    gap: 4px;
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 600;
}
.annotation-form input,
.annotation-form select {
    min-height: 34px;
    padding: 7px 9px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: #FFFFFF;
    color: var(--text);
    font: inherit;
}
.annotation-form input:focus,
.annotation-form select:focus,
.channel-search:focus {
    border-color: var(--primary);
}
.annotation-note-field {
    grid-column: 1 / -1 !important;
}
.annotation-check-field {
    display: grid !important;
    grid-column: span 4 !important;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
    gap: 8px !important;
    padding: 10px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
}
.annotation-check-field input {
    min-height: auto;
    margin-top: 2px;
    padding: 0;
}
.annotation-check-field span,
.annotation-check-field small {
    display: block;
}
.annotation-check-field strong {
    color: var(--text);
    font-size: 0.74rem;
}
.annotation-check-field small {
    margin-top: 3px;
    color: var(--text-secondary);
    font-size: 0.68rem;
    font-weight: 450;
    line-height: 1.35;
}
.annotation-check-field.is-disabled {
    cursor: not-allowed;
    opacity: 0.58;
}
.annotation-state-snapshot {
    grid-column: span 4;
    min-height: 100%;
    padding: 10px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}
.annotation-state-snapshot span,
.annotation-state-snapshot strong {
    display: block;
}
.annotation-state-snapshot span {
    color: var(--text-secondary);
    font-size: 0.68rem;
    font-weight: 600;
}
.annotation-state-snapshot strong {
    margin-top: 4px;
    color: var(--text);
    font-size: 0.74rem;
    line-height: 1.4;
}
.annotation-actions {
    display: flex;
    grid-column: 1 / -1;
    justify-content: flex-end;
    gap: 6px;
}
.annotation-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 12px;
}
.annotation-empty {
    color: var(--text-muted);
    font-size: 0.78rem;
}
.annotation-row {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr) auto;
    align-items: start;
    gap: 12px;
    padding: 10px 0;
    border-top: 1px solid var(--border-light);
}
.annotation-time,
.annotation-export,
.annotation-edit,
.annotation-remove {
    border: 0;
    background: transparent;
    color: var(--primary);
    font: inherit;
    font-size: 0.74rem;
    font-weight: 650;
    cursor: pointer;
}
.annotation-time {
    padding: 3px 6px;
    background: var(--primary-bg);
    border-radius: var(--radius-sm);
    font-variant-numeric: tabular-nums;
}
.annotation-content strong {
    color: var(--text);
    font-size: 0.74rem;
}
.annotation-content p {
    margin-top: 2px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    overflow-wrap: anywhere;
}
.annotation-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 6px;
}
.annotation-badge {
    max-width: 100%;
    overflow: hidden;
    padding: 3px 6px;
    background: var(--surface-muted);
    border-radius: var(--radius-xs);
    color: var(--text-secondary);
    font-size: 0.66rem;
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.annotation-badge-warning {
    background: #FFF4DB;
    color: #825100;
}
.annotation-remove {
    color: var(--danger);
}
.annotation-edit {
    color: var(--primary);
}
.annotation-export {
    color: var(--primary-dark);
}

.export-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
}
.export-card {
    padding: 20px;
    border-color: var(--border);
    border-radius: var(--radius-md);
    transition: border-color var(--transition), background var(--transition);
}
.export-card:hover {
    border-color: #AFC4DD;
    box-shadow: none;
    transform: none;
}
.export-card-featured {
    background: #F2F6FF;
    border-color: #BFD1FA;
}
.export-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
}
.toast-container {
    z-index: 1800;
}
.toast {
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 24px rgba(16, 36, 62, 0.14);
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast-icon {
    display: inline-flex;
}
.keyboard-help-dialog {
    width: min(520px, calc(100vw - 28px));
    padding: 0;
    border: 0;
    border-radius: var(--radius-lg);
    background: #FFFFFF;
    color: var(--text);
    box-shadow: 0 8px 24px rgba(16, 36, 62, 0.18);
}
.keyboard-help-dialog::backdrop {
    background: rgba(10, 24, 42, 0.58);
}
.dialog-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border-light);
}
.dialog-heading h2 {
    font-size: 1.1rem;
}
.dialog-heading p {
    margin-top: 3px;
    color: var(--text-secondary);
    font-size: 0.76rem;
}
.dialog-close {
    width: 30px;
    height: 30px;
    border: 0;
    border-radius: var(--radius-sm);
    background: var(--surface-muted);
    color: var(--text-secondary);
    font: 500 1.25rem/1 var(--font);
    cursor: pointer;
}
.shortcut-list {
    padding: 10px 20px 18px;
}
.shortcut-list > div {
    display: grid;
    grid-template-columns: 140px 1fr;
    align-items: center;
    gap: 12px;
    padding: 9px 0;
    border-bottom: 1px solid var(--border-light);
}
.shortcut-list > div:last-child {
    border-bottom: 0;
}
.shortcut-list dt,
.shortcut-list dd {
    margin: 0;
}
.shortcut-list dd {
    color: var(--text-secondary);
    font-size: 0.8rem;
}
kbd {
    display: inline-flex;
    min-width: 26px;
    min-height: 25px;
    align-items: center;
    justify-content: center;
    padding: 3px 7px;
    border: 1px solid #C4D0DC;
    border-bottom-width: 2px;
    border-radius: 5px;
    background: #F7F9FB;
    color: var(--text);
    font: 600 0.72rem/1 var(--font);
}

@media (max-width: 1100px) {
    .header-left,
    .header-right {
        min-width: auto;
    }
}

@media (max-width: 768px) {
    .workspace-status {
        padding-inline: 12px;
    }
    .workspace-status-item {
        padding-inline: 10px;
    }
    .dashboard {
        padding-top: 92px;
    }
    .main-content {
        height: calc(100vh - 92px);
        padding: 14px 12px 84px;
    }
    .sidebar {
        top: 92px;
        height: calc(100vh - 92px);
    }
    .tab-header {
        display: block;
    }
    .tab-header p {
        margin-top: 3px;
    }
    .viewer-toolbar {
        gap: 6px;
    }
    .btn-tool-accent {
        margin-left: 0;
    }
    .annotation-form {
        grid-template-columns: 1fr;
    }
    .annotation-form > label,
    .annotation-note-field,
    .annotation-check-field,
    .annotation-state-snapshot,
    .annotation-actions {
        grid-column: 1 !important;
    }
    .annotation-actions {
        justify-content: flex-end;
    }
    .annotation-row {
        grid-template-columns: 88px minmax(0, 1fr);
    }
    .annotation-row-actions {
        grid-column: 2;
        justify-self: start;
    }
    .hero-title {
        font-size: 2rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================
   Research workflow refinements
   ============================ */
.loader-bar-inner {
    width: var(--loader-progress, 0%);
    transform: none;
    animation: none;
}
.upload-progress-bar::after {
    width: var(--progress, 0%);
}

.analysis-controls {
    width: fit-content;
    max-width: 100%;
    min-height: 70px;
    align-items: flex-end;
    border-color: var(--border);
}
.analysis-controls .control-group.inline {
    margin: 0;
}
.analysis-controls.band-control-bar {
    width: 100%;
}
.analysis-controls.band-control-bar > .btn-primary,
.analysis-controls.band-control-bar > .btn-secondary {
    margin-left: 0;
}
.analysis-controls > .btn-primary,
.analysis-controls > .btn-secondary,
.analysis-controls > .btn-ghost {
    min-height: 34px;
    margin-left: 8px;
}
.filter-layout {
    display: inline-flex;
    width: fit-content;
    max-width: 100%;
    gap: 14px;
}
.filter-layout .filter-type-cards {
    margin-right: 0;
}
.filter-layout .filter-params {
    gap: 8px;
}
.filter-layout .filter-actions {
    margin-left: 8px;
}
.filter-layout .filter-actions button {
    min-height: 34px;
    white-space: nowrap;
}

#viewer-interaction-canvas {
    position: absolute;
    z-index: 3;
    display: block;
    touch-action: none;
    cursor: crosshair;
}
#viewer-interaction-canvas:focus-visible {
    outline-offset: -4px;
}
.viewer-hover-tooltip {
    position: absolute;
    z-index: 5;
    max-width: 230px;
    padding: 6px 8px;
    background: #10243E;
    color: #FFFFFF;
    border-radius: var(--radius-sm);
    font-size: 0.72rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
    pointer-events: none;
    box-shadow: 0 2px 8px rgba(16, 36, 62, 0.18);
}
.viewer-hover-tooltip[hidden] {
    display: none;
}
.viewer-context-menu {
    position: absolute;
    z-index: 7;
    width: min(270px, calc(100% - 24px));
    overflow: hidden;
    padding: 6px;
    background: var(--navy-deep);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 14px rgba(7, 19, 38, 0.28);
    color: #FFFFFF;
}
.viewer-context-menu[hidden] {
    display: none;
}
.viewer-context-heading {
    padding: 8px 9px 9px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.viewer-context-heading strong,
.viewer-context-heading span {
    display: block;
}
.viewer-context-heading strong {
    font-size: 0.76rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}
.viewer-context-heading span {
    margin-top: 1px;
    color: #B9CAE1;
    font-size: 0.67rem;
}
.viewer-context-menu button {
    display: flex;
    width: 100%;
    min-height: 36px;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 9px;
    border: 0;
    border-radius: var(--radius-sm);
    background: transparent;
    color: #F8FBFF;
    font: 550 0.76rem/1.25 var(--font);
    text-align: left;
    cursor: pointer;
}
.viewer-context-menu button:hover,
.viewer-context-menu button:focus-visible {
    outline: none;
    background: var(--navy-raised);
}
.viewer-context-menu button:disabled {
    color: #71849D;
    cursor: not-allowed;
}
.viewer-context-menu button:disabled:hover {
    background: transparent;
}
.viewer-context-menu button small,
.viewer-context-menu button kbd {
    flex: 0 0 auto;
    color: #AFC4DF;
    font-size: 0.63rem;
    font-weight: 600;
}
.viewer-context-menu button kbd {
    min-width: 22px;
    min-height: 20px;
    padding: 2px 5px;
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.08);
}
.viewer-context-separator {
    height: 1px;
    margin: 5px 9px;
    background: rgba(255, 255, 255, 0.12);
}
.viewer-context-menu .context-menu-muted {
    color: #CAD7E8;
}
.viewer-selection-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 10px;
    padding: 10px 12px;
    background: var(--primary-bg-subtle);
    border: 1px solid #BFD1FA;
    border-radius: var(--radius-sm);
}
.viewer-overview {
    margin-top: 10px;
    padding: 8px 12px 10px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}
.viewer-overview-label {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 5px;
    color: var(--text-muted);
    font-size: 0.68rem;
}
.viewer-overview-label strong {
    color: var(--text-secondary);
    font-weight: 650;
}
#viewer-overview-canvas {
    display: block;
    max-width: 100%;
    cursor: ew-resize;
    touch-action: none;
}
.review-dock {
    margin-top: 12px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.review-dock-bar {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    min-height: 46px;
    background: #F7F9FC;
    border-bottom: 1px solid var(--border);
}
.review-dock.is-collapsed .review-dock-bar {
    border-bottom-color: transparent;
}
.review-dock-tabs {
    display: flex;
    min-width: 0;
    padding-inline: 6px;
}
.review-dock-tab {
    display: flex;
    align-items: center;
    gap: 7px;
    min-width: 0;
    padding: 0 12px;
    border: 0;
    border-bottom: 2px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    font: 650 0.76rem/1 var(--font);
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.review-dock-tab:hover {
    background: #EEF3F8;
    color: var(--text);
}
.review-dock-tab.active {
    border-bottom-color: var(--primary);
    background: #FFFFFF;
    color: var(--text);
}
.review-tab-summary {
    min-width: 20px;
    overflow: hidden;
    padding: 3px 6px;
    background: #E7EDF4;
    border-radius: 999px;
    color: var(--text-secondary);
    font-size: 0.64rem;
    font-weight: 650;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.review-dock-tab.active .review-tab-summary {
    background: var(--primary-bg-subtle);
    color: var(--primary-dark);
}
.review-dock-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 0 13px;
    border: 0;
    border-left: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    font: 650 0.7rem/1 var(--font);
    cursor: pointer;
}
.review-dock-toggle:hover {
    background: #EEF3F8;
    color: var(--text);
}
.review-dock-toggle svg {
    transition: transform var(--transition);
}
.review-dock.is-collapsed .review-dock-toggle svg {
    transform: rotate(180deg);
}
.review-dock-content {
    padding: 12px 16px 14px;
}
.review-dock-content[hidden],
.review-dock-panel[hidden] {
    display: none;
}
.review-dock-panel:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: -2px;
}
.review-panel-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-height: 30px;
}
.review-panel-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px;
}
.quality-timeline,
.analysis-history {
    margin: 0;
    padding: 0;
    background: transparent;
    border: 0;
    border-radius: 0;
}
.quality-timeline-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}
.quality-timeline-actions output {
    max-width: 60ch;
    color: var(--text-secondary);
    font-size: 0.7rem;
    font-weight: 600;
    line-height: 1.35;
    text-align: left;
}
.quality-timeline-lanes {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-top: 10px;
}
.quality-timeline-lane {
    display: grid;
    grid-template-columns: 106px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
}
.quality-timeline-lane > span {
    color: var(--text-secondary);
    font-size: 0.68rem;
    font-weight: 600;
}
.quality-lane-track {
    position: relative;
    height: 15px;
    overflow: hidden;
    background: #E6EDF4;
    border-radius: var(--radius-xs);
}
.quality-region {
    position: absolute;
    z-index: 2;
    top: 3px;
    bottom: 3px;
    min-width: 3px;
    padding: 0;
    border: 0;
    border-radius: 2px;
    cursor: pointer;
}
.quality-region:hover,
.quality-region:focus-visible {
    z-index: 4;
    outline: 2px solid var(--text);
    outline-offset: 1px;
}
.quality-region-flat { background: #9A7400; }
.quality-region-amplitude { background: #C73E4D; }
.quality-region-clipping { background: #8F3042; }
.quality-region-line-noise { background: #0E8E9D; }
.quality-region-muscle { background: #7657A8; }
.quality-region-annotation { background: var(--primary); }
.quality-region-annotation.is-excluded { background: #B36A00; }
.quality-timeline-viewport {
    position: absolute;
    z-index: 3;
    inset-block: 0;
    min-width: 2px;
    background: rgba(49, 90, 239, 0.08);
    border-inline: 1px solid var(--primary);
    pointer-events: none;
}
.quality-timeline-axis {
    display: flex;
    justify-content: space-between;
    margin: 5px 0 0 116px;
    color: var(--text-muted);
    font-size: 0.64rem;
    font-variant-numeric: tabular-nums;
}
.analysis-history-actions {
    display: flex;
    align-items: center;
}
.history-comparison {
    display: block;
    flex: 1 1 320px;
    margin: 0;
    padding: 9px 10px;
    background: var(--surface-muted);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.74rem;
    font-weight: 600;
}
.history-list {
    display: flex;
    flex-direction: column;
    max-height: 240px;
    overflow-y: auto;
    margin: 10px 0 0;
    padding: 0;
    list-style: none;
}
.history-item {
    display: grid;
    grid-template-columns: 74px minmax(0, 1fr) auto;
    gap: 12px;
    padding: 10px 0;
    border-top: 1px solid var(--border-light);
}
.history-time {
    color: var(--text-muted);
    font-size: 0.68rem;
    font-variant-numeric: tabular-nums;
}
.history-content strong,
.history-content span {
    display: block;
}
.history-content strong {
    color: var(--text);
    font-size: 0.76rem;
}
.history-content span {
    margin-top: 2px;
    color: var(--text-secondary);
    font-size: 0.72rem;
    line-height: 1.4;
}
.history-state {
    align-self: start;
    padding: 3px 6px;
    background: var(--primary-bg-subtle);
    border-radius: var(--radius-xs);
    color: var(--primary-dark);
    font-size: 0.64rem;
    font-weight: 650;
    white-space: nowrap;
}
.history-item.is-undone {
    opacity: 0.58;
}
.history-item.is-undone .history-state {
    background: var(--surface-muted);
    color: var(--text-secondary);
}
.history-empty {
    padding: 10px 0 2px;
    color: var(--text-secondary);
    font-size: 0.76rem;
}
@media (max-width: 768px) {
    .review-dock-tabs {
        flex: 1 1 auto;
        padding-inline: 2px;
    }
    .review-dock-tab {
        flex: 1 1 0;
        justify-content: center;
        gap: 5px;
        padding-inline: 7px;
    }
    .review-dock-toggle {
        width: 42px;
        justify-content: center;
        padding: 0;
    }
    .review-dock-toggle span {
        position: absolute;
        width: 1px;
        height: 1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        white-space: nowrap;
    }
    .review-dock-content {
        padding: 12px;
    }
    .review-panel-toolbar,
    .quality-timeline-actions,
    .analysis-history-actions,
    .annotation-header-tools {
        align-items: stretch;
        flex-direction: column;
    }
    .review-panel-actions {
        justify-content: flex-start;
    }
    .quality-timeline-actions output {
        max-width: none;
        text-align: left;
    }
    .quality-timeline-lane {
        grid-template-columns: 88px minmax(0, 1fr);
        gap: 8px;
    }
    .quality-timeline-axis {
        margin-left: 96px;
    }
    .history-item {
        grid-template-columns: 64px minmax(0, 1fr);
    }
    .history-state {
        grid-column: 2;
        justify-self: start;
    }
}
.viewer-selection-bar[hidden] {
    display: none;
}
.viewer-selection-bar strong,
.viewer-selection-bar span {
    display: block;
    font-variant-numeric: tabular-nums;
}
.viewer-selection-bar strong {
    color: var(--text);
    font-size: 0.8rem;
}
.viewer-selection-bar span {
    margin-top: 2px;
    color: var(--text-secondary);
    font-size: 0.72rem;
}
.viewer-selection-actions {
    display: flex;
    gap: 6px;
}
.viewer-selection-actions button {
    min-height: 32px;
    padding: 6px 10px;
    white-space: nowrap;
}
.annotation-form {
    flex-wrap: wrap;
}
.annotation-form > label:not(.annotation-note-field) {
    min-width: 110px;
}
.annotation-time {
    min-width: 68px;
}

.export-setup {
    display: flex;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 16px;
    padding: 16px;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
}
.export-setup-copy {
    flex: 1 1 220px;
    align-self: center;
}
.export-setup-copy h3 {
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 650;
}
.export-setup-copy p {
    max-width: 48ch;
    margin-top: 2px;
    color: var(--text-secondary);
    font-size: 0.74rem;
}
.export-setup .control-group.inline {
    margin: 0;
}
.export-setup .toolbar-input {
    width: 88px;
}
.export-size-estimate {
    flex: 1 0 100%;
    padding-top: 8px;
    border-top: 1px solid var(--border-light);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.export-size-estimate.error {
    color: var(--danger);
}
.export-card-actions {
    display: flex;
    gap: 6px;
}
.export-card-actions-stack {
    flex-direction: column;
}
.btn-export-secondary {
    background: #FFFFFF;
    border: 1px solid var(--border);
}
.btn-export:disabled,
.btn-primary:disabled,
.btn-secondary:disabled,
.btn-ghost:disabled {
    cursor: not-allowed;
    opacity: 0.52;
    transform: none;
}

/* Bright lower-workspace surfaces */
.features-section {
    margin-top: 24px;
    background: var(--surface-muted);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.features-heading {
    color: var(--text);
}
.feature-card {
    background: #FFFFFF;
    border-color: var(--border);
}
.feature-card:hover {
    background: #F9FBFD;
    border-color: #AFC1D4;
    box-shadow: none;
    transform: none;
}
.feature-card h3 {
    color: var(--text);
}
.feature-card p {
    color: var(--text-secondary);
}
.feature-icon {
    background: var(--primary-bg-subtle);
}

.annotation-empty {
    color: var(--text-secondary);
}
.annotation-count {
    background: var(--surface-muted);
    color: var(--text-secondary);
}
.annotation-row {
    border-top-color: var(--border-light);
}
.annotation-content strong {
    color: var(--text);
}
.annotation-content p {
    color: var(--text-secondary);
}
.annotation-time {
    background: var(--primary-bg-subtle);
    color: var(--primary-dark);
}
.annotation-edit {
    color: var(--primary-dark);
}
.annotation-remove {
    color: var(--danger);
}
.annotation-form {
    background: var(--surface-muted);
}

#tab-filter .filter-canvas-row,
#tab-stats .stats-charts,
#tab-export .export-grid {
    padding: 14px;
    background: var(--surface-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}
#tab-filter .filter-canvas-row,
#tab-stats .stats-charts {
    gap: 12px;
}
#tab-filter .filter-canvas-row .canvas-container,
#tab-stats .stats-charts .chart-container {
    margin-bottom: 0;
}
#tab-export .export-card {
    background: #FFFFFF;
}

@media (max-width: 1100px) {
    .analysis-controls,
    .filter-layout {
        width: 100%;
    }
    .filter-layout {
        flex-wrap: wrap;
    }
    .filter-layout .filter-actions {
        width: 100%;
        margin-left: 0;
    }
    .band-chart-grid {
        grid-template-columns: 1fr;
    }
    .bands-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        overflow: visible;
        border: 0;
    }
    .band-card,
    .band-card:last-child {
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
    }
    .band-run-summary {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .analysis-controls {
        min-height: 0;
    }
    .viewer-selection-bar {
        align-items: stretch;
        flex-direction: column;
    }
    .viewer-selection-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }
    .viewer-selection-actions .btn-ghost {
        grid-column: 1 / -1;
    }
    .band-control-copy {
        flex-basis: 100%;
        margin-right: 0;
    }
    .band-control-bar .control-group.inline,
    .band-control-bar .toolbar-select,
    .band-control-bar > button {
        width: 100%;
    }
    .bands-grid {
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        overflow: visible;
        border: 0;
    }
    .band-card,
    .band-card:last-child {
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
    }
    .band-card:last-child {
        grid-column: 1 / -1;
    }
    .band-run-summary {
        grid-template-columns: 1fr;
    }
    .band-results-surface,
    .band-profile-panel {
        padding: 14px;
    }
    .band-profile-heading,
    .band-results-heading {
        display: block;
    }
    .band-profile-heading > span,
    .band-results-heading > span {
        display: inline-block;
        margin-top: 8px;
    }
    .export-setup {
        align-items: stretch;
        flex-direction: column;
    }
    .export-setup-copy {
        flex: none;
        width: 100%;
    }
    .export-setup .control-group.inline,
    .export-setup .toolbar-input,
    .export-setup .toolbar-select {
        width: 100%;
    }
    .export-card-actions {
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    .loader-bar-inner {
        transition: none !important;
        transform: none;
    }
    .upload-progress-bar::after {
        animation: none !important;
    }
}

/* Outcome-based toolbar labels need their intrinsic width on compact workspaces. */
#viewer-fit.btn-tool,
#add-annotation-btn.btn-tool {
    width: auto;
    min-width: max-content;
    padding-inline: 10px;
    white-space: nowrap;
}

#new-file-btn.btn-header {
    flex: 0 0 auto;
    white-space: nowrap;
}

/* Signal viewer density and focus modes */
.viewer-toolbar {
    align-items: center;
    gap: 8px 12px;
}
.viewer-toolbar-group {
    display: inline-flex;
    min-width: 0;
    align-items: center;
    gap: 6px;
}
.viewer-toolbar-group + .viewer-toolbar-group {
    padding-left: 12px;
    border-left: 1px solid var(--border);
}
.viewer-review-tools {
    margin-left: auto;
}
.viewer-focus-toggle {
    width: auto;
    min-width: max-content;
    gap: 6px;
    padding-inline: 9px;
    white-space: nowrap;
}
.viewer-focus-toggle[aria-pressed="true"] {
    background: var(--primary-bg-subtle);
    border-color: var(--primary);
    color: var(--primary-dark);
}

#viewer-canvas-container {
    min-height: 0;
    padding: 12px;
    overflow: hidden;
}
.viewer-canvas-scroll {
    width: 100%;
    max-height: 500px;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-gutter: stable;
    scrollbar-color: #A8B7C8 #EEF2F6;
    border-radius: calc(var(--radius-md) - 3px);
}
.viewer-canvas-scroll[data-scrollable="true"] {
    border-bottom: 1px solid var(--border-light);
}
.viewer-canvas-stage {
    position: relative;
    width: 100%;
    min-width: 0;
}
#viewer-interaction-canvas {
    touch-action: pan-y;
}
#viewer-canvas {
    width: 100%;
    height: auto;
}
.viewer-canvas-stage .canvas-labels {
    top: 0;
    bottom: 0;
}

body.viewer-focus-active {
    overflow: hidden;
}
body.viewer-focus-active .main-header,
body.viewer-focus-active .workspace-status,
body.viewer-focus-active .mobile-bottom-nav {
    display: none !important;
}
.dashboard.is-viewer-focus {
    height: 100vh;
    height: 100dvh;
    padding-top: 0;
}
.dashboard.is-viewer-focus .sidebar,
.dashboard.is-viewer-focus #tab-viewer > .tab-header,
.dashboard.is-viewer-focus #tab-viewer > .review-dock {
    display: none;
}
.dashboard.is-viewer-focus .main-content {
    height: 100vh;
    height: 100dvh;
    padding: 10px 12px;
}
.dashboard.is-viewer-focus .viewer-toolbar {
    margin-bottom: 10px;
}

@media (max-width: 1180px) {
    .viewer-review-tools {
        width: 100%;
        margin-left: 0;
        padding-top: 8px;
        padding-left: 0 !important;
        border-top: 1px solid var(--border-light);
        border-left: 0 !important;
    }
    .viewer-review-tools #add-annotation-btn {
        margin-left: auto;
    }
}

@media (max-width: 768px) {
    .viewer-toolbar {
        align-items: stretch;
    }
    .viewer-toolbar-group {
        flex-wrap: wrap;
    }
    .viewer-toolbar-group + .viewer-toolbar-group {
        width: 100%;
        padding-top: 8px;
        padding-left: 0;
        border-top: 1px solid var(--border-light);
        border-left: 0;
    }
    .viewer-display-tools .toolbar-select {
        flex: 1 1 116px;
        width: auto;
    }
    .viewer-review-tools .toolbar-time-display {
        margin-right: auto;
    }
    .viewer-review-tools #add-annotation-btn {
        margin-left: 0;
    }
    #viewer-canvas-container {
        min-height: 0;
        padding: 8px;
    }
    #viewer-canvas {
        height: auto;
    }
    .dashboard.is-viewer-focus .main-content {
        height: 100vh;
        height: 100dvh;
        padding: 8px;
    }
}