/* First Motion Explorer - Light Theme Styles */

:root {
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-card: #eef1f5;
    --bg-hover: #e2e6ec;
    --text-primary: #1a1a2e;
    --text-secondary: #555770;
    --text-muted: #8e90a6;
    --border-color: #d0d5dd;
    --accent-primary: #2563eb;
    --accent-hover: #1d4ed8;
    --success: #16a34a;
    --success-bg: rgba(22, 163, 74, 0.1);
    --error: #dc2626;
    --error-bg: rgba(220, 38, 38, 0.1);
    --warning: #d97706;
    --warning-bg: rgba(217, 119, 6, 0.1);
    --up-color: #16a34a;
    --down-color: #2563eb;
    --unclear-color: #8e90a6;
    --p-wave-color: #dc2626;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow: hidden;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    border-bottom: 1px solid var(--border-color);
}

.header-left {
    display: flex;
    align-items: baseline;
    gap: 1rem;
}

header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
}

.subtitle {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
}

.header-right {
    display: flex;
    gap: 1rem;
}

.nav-link {
    color: #dbeafe;
    text-decoration: none;
    font-size: 0.85rem;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    transition: background 0.2s;
}

.nav-link:hover {
    background: rgba(255,255,255,0.1);
}

/* Main Layout */
.app-container {
    display: flex;
    height: calc(100vh - 50px);
    overflow: hidden;
}

.left-panel {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    flex-shrink: 0;
}

.center-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 400px;
    background: var(--bg-primary);
}

.right-panel {
    width: 380px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

/* Control Sections */
.control-section {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.control-section h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.input-group {
    margin-bottom: 0.75rem;
}

.input-group label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.85rem;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.input-row {
    display: flex;
    gap: 0.5rem;
}

.input-group.half {
    flex: 1;
}

.separator {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0.75rem 0;
    position: relative;
}

.separator::before,
.separator::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 30%;
    height: 1px;
    background: var(--border-color);
}

.separator::before { left: 0; }
.separator::after { right: 0; }

/* Buttons */
.btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    margin-top: 0.5rem;
}

.btn:hover:not(:disabled) {
    background: var(--bg-hover);
}

.btn.primary {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.btn.primary:hover:not(:disabled) {
    background: var(--accent-hover);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn.small {
    padding: 0.25rem 0.5rem;
    width: auto;
    margin: 0;
}

.btn-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-group span {
    min-width: 2.5rem;
    text-align: center;
    font-size: 0.85rem;
}

/* Event Results */
.event-results {
    max-height: 200px;
    overflow-y: auto;
    margin-top: 0.75rem;
}

.event-item {
    padding: 0.5rem;
    background: var(--bg-card);
    border-radius: 4px;
    margin-bottom: 0.5rem;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 0.8rem;
}

.event-item:hover {
    background: var(--bg-hover);
}

.event-item.selected {
    border: 1px solid var(--accent-primary);
}

.event-item .event-mag {
    font-weight: 600;
    color: var(--accent-primary);
}

.event-item .event-location {
    color: var(--text-secondary);
}

.event-item .event-time {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Event Info */
#event-info {
    background: var(--bg-card);
    padding: 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    margin-bottom: 0.75rem;
}

#event-info .info-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.25rem;
}

#event-info .info-label {
    color: var(--text-secondary);
}

/* Zoom Controls */
.zoom-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.zoom-controls label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Progress */
.progress-info {
    text-align: center;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.progress-bar-container {
    height: 6px;
    background: var(--bg-card);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.75rem;
}

.progress-bar {
    height: 100%;
    background: var(--accent-primary);
    width: 0%;
    transition: width 0.3s;
}

/* Center Panel - Focal Sphere */
.focal-sphere-container {
    flex: 0 0 auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.focal-sphere-container h3 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-card);
    font-size: 0.7rem;
    cursor: help;
}

#focal-sphere-canvas {
    background: var(--bg-card);
    border-radius: 50%;
    border: 2px solid var(--border-color);
}

.focal-sphere-legend {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.75rem;
    font-size: 0.75rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.symbol {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 600;
}

.symbol.up {
    background: var(--up-color);
    color: white;
}

.symbol.down {
    background: transparent;
    border: 2px solid var(--down-color);
    color: var(--down-color);
}

.symbol.unclear {
    background: var(--bg-hover);
    color: var(--unclear-color);
}

/* View Tabs (2D/Demo) */
.view-tabs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.view-tab {
    padding: 0.4rem 0.8rem;
    border: none;
    background: var(--bg-card);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all 0.2s;
}

.view-tab:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.view-tab.active {
    background: var(--accent-primary);
    color: white;
}

.view-content {
    position: relative;
    width: 350px;
    min-height: 350px;
}

.view-panel {
    display: none;
    width: 100%;
}

.view-panel.active {
    display: block;
}

/* Inversion Demo */
.demo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.demo-container canvas {
    border-radius: 8px;
    border: 2px solid var(--border-color);
    background: #f5f7fa;
}

.demo-info {
    width: 100%;
    text-align: center;
}

.demo-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.demo-description {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.demo-stats {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 0.4rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.demo-nav {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.25rem;
}

.demo-step-indicator {
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 3rem;
    text-align: center;
}

#run-demo-btn {
    margin-top: 0.25rem;
    width: 100%;
}

.demo-match-legend {
    display: flex;
    gap: 1rem;
    justify-content: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.demo-match-legend .match {
    color: var(--success);
}

.demo-match-legend .mismatch {
    color: var(--error);
}

/* Map */
.map-container {
    flex: 1;
    min-height: 200px;
}

#map {
    width: 100%;
    height: 100%;
    background: var(--bg-card);
}

/* Right Panel - Waveforms */
.waveform-header {
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-secondary);
}

.waveform-header h3 {
    font-size: 0.9rem;
    font-weight: 600;
}

.sort-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sort-controls label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.sort-controls select {
    padding: 0.25rem 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.75rem;
}

.waveform-container {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
    padding: 2rem;
}

.empty-state .hint {
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

/* Station Waveform Card */
.station-card {
    background: var(--bg-card);
    border-radius: 6px;
    margin-bottom: 0.75rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s;
}

.station-card.picked-up {
    border-color: var(--up-color);
    background: var(--success-bg);
}

.station-card.picked-down {
    border-color: var(--down-color);
    background: rgba(37, 99, 235, 0.08);
}

.station-card.picked-unclear {
    border-color: var(--unclear-color);
    background: rgba(142, 144, 166, 0.08);
}

.station-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    background: rgba(0,0,0,0.04);
    font-size: 0.75rem;
}

.station-name {
    font-weight: 600;
    color: var(--accent-primary);
}

.station-info {
    color: var(--text-secondary);
    display: flex;
    gap: 0.75rem;
}

.waveform-canvas {
    width: 100%;
    height: 80px;
    display: block;
    cursor: crosshair;
}

.picker-buttons {
    display: flex;
    padding: 0.5rem;
    gap: 0.5rem;
    background: rgba(0,0,0,0.04);
}

.pick-btn {
    flex: 1;
    padding: 0.4rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
}

.pick-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.pick-btn.up:hover,
.pick-btn.up.selected {
    background: var(--up-color);
    border-color: var(--up-color);
    color: white;
}

.pick-btn.down:hover,
.pick-btn.down.selected {
    background: var(--down-color);
    border-color: var(--down-color);
    color: white;
}

.pick-btn.unclear:hover,
.pick-btn.unclear.selected {
    background: var(--unclear-color);
    border-color: var(--unclear-color);
    color: white;
}

.pick-btn .arrow {
    font-size: 1rem;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.open {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.tutorial-modal {
    max-width: 700px;
}

.results-modal {
    max-width: 500px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

.modal-footer .btn {
    width: auto;
    margin: 0;
}

/* Tutorial */
#tutorial-content {
    min-height: 200px;
}

#tutorial-content h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--accent-primary);
}

#tutorial-content p {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

#tutorial-content .highlight {
    background: var(--warning-bg);
    padding: 0.75rem;
    border-radius: 4px;
    border-left: 3px solid var(--warning);
    margin: 1rem 0;
}

#tutorial-content img {
    max-width: 100%;
    border-radius: 4px;
    margin: 1rem 0;
}

.tutorial-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

#tutorial-step {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Results */
.results-score {
    text-align: center;
    margin-bottom: 1.5rem;
}

.score-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    border: 4px solid;
}

.score-circle.excellent {
    border-color: var(--success);
    color: var(--success);
}

.score-circle.good {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.score-circle.fair {
    border-color: var(--warning);
    color: var(--warning);
}

.score-circle.poor {
    border-color: var(--error);
    color: var(--error);
}

.score-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.score-label {
    font-size: 0.75rem;
}

.results-message {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.results-breakdown {
    background: var(--bg-card);
    border-radius: 4px;
    padding: 1rem;
}

.results-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.results-row:last-child {
    border-bottom: none;
}

.results-row .correct {
    color: var(--success);
}

.results-row .incorrect {
    color: var(--error);
}

/* Hint Toast */
.hint-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
    z-index: 1001;
    opacity: 0;
    transition: all 0.3s ease;
    max-width: 400px;
    text-align: center;
    font-size: 0.9rem;
    border-left: 4px solid var(--warning);
}

.hint-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Loading Overlay */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(245, 247, 250, 0.92);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 1rem;
}

.loading-overlay.visible {
    display: flex;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#loading-message {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Leaflet customization */
.leaflet-container {
    background: var(--bg-card);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Responsive */
@media (max-width: 1200px) {
    .left-panel {
        width: 250px;
    }
    .right-panel {
        width: 340px;
    }
}

@media (max-width: 900px) {
    .app-container {
        flex-direction: column;
    }
    .left-panel,
    .right-panel {
        width: 100%;
        max-height: 40vh;
    }
    .center-panel {
        min-height: 300px;
    }
}

/* Mechanism Fitting Section */
.slider-group {
    margin-bottom: 0.75rem;
}

.slider-group label {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.slider-group input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--bg-hover);
    border-radius: 3px;
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s;
}

.slider-group input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--accent-hover);
}

.mechanism-presets {
    display: flex;
    gap: 0.5rem;
    margin: 0.75rem 0;
}

.preset-btn {
    flex: 1;
    font-size: 0.75rem !important;
    padding: 0.35rem 0.5rem !important;
}

.checkbox-group {
    margin-top: 0.5rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.hint-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

/* Mouse hints in waveform header */
.mouse-hints {
    display: flex;
    gap: 1rem;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.mouse-hints span {
    cursor: help;
    opacity: 0.7;
}

.mouse-hints span:hover {
    opacity: 1;
    color: var(--text-secondary);
}

/* Mechanism comparison in results */
.mechanism-comparison {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.mechanism-comparison h4 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.mech-row {
    display: grid;
    grid-template-columns: 80px 1fr 1fr 1fr;
    gap: 0.5rem;
    padding: 0.35rem 0;
    font-size: 0.85rem;
}

.mech-row .header {
    color: var(--text-muted);
    font-weight: 600;
    text-align: center;
}

.mech-row .label {
    color: var(--text-secondary);
}

.mech-row span:not(.label):not(.header) {
    text-align: center;
}

.mech-row.actual {
    background: var(--success-bg);
    border-radius: 4px;
    padding: 0.5rem;
    margin: 0.25rem 0;
}

.mech-fit-score {
    margin-top: 1rem;
    text-align: center;
    color: var(--text-secondary);
}

.mech-fit-score strong {
    color: var(--accent-primary);
    font-size: 1.1rem;
}

/* Inversion Section */
.inversion-section {
    margin-top: 0.75rem;
}

.inversion-progress {
    margin-top: 0.5rem;
}

.inversion-progress-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
    text-align: center;
    margin-top: 0.25rem;
}

.inversion-result {
    margin-top: 0.75rem;
    background: var(--bg-card);
    border-radius: 4px;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
}

.inversion-result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.inversion-result-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.quality-badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    text-transform: uppercase;
}

.quality-badge.quality-a {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success);
}

.quality-badge.quality-b {
    background: rgba(37, 99, 235, 0.1);
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

.quality-badge.quality-c {
    background: var(--warning-bg);
    color: var(--warning);
    border: 1px solid var(--warning);
}

.quality-badge.quality-d {
    background: var(--error-bg);
    color: var(--error);
    border: 1px solid var(--error);
}

.inversion-result-values {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.inversion-result-values strong {
    color: var(--accent-primary);
}

.inversion-misfit {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

#apply-inversion-btn {
    width: 100%;
}