/* ===========================================
   Compression Trainer - Project Styles
   =========================================== */

.ct-app {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* ===========================================
   Toolbar (Source + Gain + Mode in one strip)
   =========================================== */

.ct-toolbar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: 10px var(--spacing-sm);
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

/* Hide upload/playback extras in teaching/quiz mode */
.teaching-mode .ct-source-extras,
.quiz-mode .ct-source-extras {
    display: none !important;
}

.ct-toolbar-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.ct-toolbar-row + .ct-toolbar-row {
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.ct-toolbar-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ct-toolbar-gain {
    flex: 1;
    min-width: 120px;
}

.ct-toolbar-label {
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    width: 50px;
    flex-shrink: 0;
}

.ct-toolbar-buttons {
    display: flex;
    align-items: center;
    gap: 6px;
}

.ct-toolbar-buttons .ct-toolbar-btn + .ct-toolbar-btn::before {
    content: '';
    position: absolute;
    left: -4px;
    top: 20%;
    height: 60%;
    width: 1px;
    background: var(--color-border);
}

.ct-toolbar-buttons .ct-toolbar-btn {
    position: relative;
}

.ct-toolbar-btn {
    padding: 7px 14px;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    background: var(--color-control-bg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.ct-toolbar-btn:hover {
    border-color: var(--color-text-muted);
}

.ct-toolbar-btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.ct-toolbar-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

[data-theme="dark"] .ct-toolbar-btn.active {
    background: #3b82f6;
    border-color: #3b82f6;
    color: white;
}

.ct-toolbar-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.ct-toolbar-slider {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-border);
    border-radius: 2px;
    cursor: pointer;
}

.ct-toolbar-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-accent);
    border: none;
    cursor: pointer;
}

.ct-toolbar-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-accent);
    border: none;
    cursor: pointer;
}

.ct-toolbar-slider:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.ct-toolbar-value {
    font-size: 0.6875rem;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    color: var(--color-text-muted);
    min-width: 3.5em;
    text-align: right;
    white-space: nowrap;
}

/* Source extras (upload area, playback controls) */
.ct-source-extras {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.ct-source-extras.hidden {
    display: none !important;
}

.upload-area.ct-source-extras {
    padding: var(--spacing-xs) 0;
}

.ct-upload-compact {
    flex-direction: row;
    gap: var(--spacing-xs);
    font-size: 0.8125rem;
}

.ct-play-sm {
    width: 32px;
    height: 32px;
}

.playback-controls.ct-source-extras {
    padding: 6px 0;
}

/* ===========================================
   Mode-specific controls
   =========================================== */

.ct-teaching-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.ct-teaching-controls.hidden {
    display: none !important;
}

.ct-duration-controls {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
}

.ct-duration-label {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.ct-duration-input {
    width: 56px;
    padding: 4px 6px;
    font-size: 0.8125rem;
    font-family: inherit;
    text-align: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    background: var(--color-control-bg);
    color: var(--color-text);
}

/* Teaching sequence panel */
.ct-sequence-panel {
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.ct-sequence-panel.hidden {
    display: none !important;
}

.ct-sequence-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.ct-sequence-step {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

.ct-sequence-step.hidden {
    display: none !important;
}

.ct-step-indicator {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.ct-step-text {
    margin: var(--spacing-xs) 0;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--color-text);
    font-style: italic;
}

.ct-step-nav {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

.ct-source-recommendation {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.ct-source-recommendation.hidden {
    display: none !important;
}

/* Quiz controls */
.ct-quiz-controls {
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.ct-quiz-controls.hidden {
    display: none !important;
}

.ct-quiz-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.ct-dropdown-label {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 4px;
}

.ct-quiz-source {
    font-size: 0.8125rem;
    font-family: inherit;
    padding: 5px 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    background: var(--color-control-bg);
    color: var(--color-text);
}

.ct-score {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8125rem;
}

.ct-score-label {
    color: var(--color-text-muted);
    font-weight: 500;
}

/* ===========================================
   Test Indicator
   =========================================== */

.ct-test-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 8px var(--spacing-sm);
    background: var(--color-card-bg);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    animation: ct-pulse-border 1.5s ease-in-out infinite;
}

.ct-test-indicator.hidden {
    display: none !important;
}

@keyframes ct-pulse-border {
    0%, 100% { border-color: var(--color-accent); }
    50% { border-color: transparent; }
}

/* ===========================================
   Compressor Controls Card
   =========================================== */

.ct-controls-card {
    padding: var(--spacing-sm);
}

.ct-compressor-header {
    margin-bottom: var(--spacing-xs);
}

.ct-compressor-toggles {
    display: flex;
    gap: 6px;
}

.ct-param-group {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 0;
}

/* Dividers between parameter groups */
#attack-group,
#knee-group,
#makeup-group {
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-sm);
}

.ct-param-with-discrete {
    flex-wrap: wrap;
}

.ct-param-label {
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
    width: 62px;
    flex-shrink: 0;
    margin: 0;
}

.ct-param-slider {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-border);
    border-radius: 2px;
    cursor: pointer;
    min-width: 100px;
}

.ct-param-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-accent);
    border: none;
    cursor: pointer;
}

.ct-param-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-accent);
    border: none;
    cursor: pointer;
}

.ct-param-slider:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.ct-param-value {
    font-size: 0.6875rem;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    color: var(--color-text-muted);
    min-width: 4.5em;
    text-align: right;
    white-space: nowrap;
}

/* Discrete preset buttons */
.ct-discrete-buttons {
    display: flex;
    gap: 4px;
    width: 100%;
    padding-left: 74px; /* align with slider (label width 62px + gap 12px) */
}

.ct-discrete-btn {
    padding: 4px 10px;
    font-size: 0.6875rem;
    font-weight: 500;
    font-family: inherit;
    background: var(--color-control-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.ct-discrete-btn:hover {
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

.ct-discrete-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
    font-weight: 600;
}

[data-theme="dark"] .ct-discrete-btn.active {
    background: #3b82f6;
    border-color: #3b82f6;
    color: white;
}

/* ===========================================
   Visualizations
   =========================================== */

.ct-viz-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.ct-viz-top {
    display: flex;
    gap: var(--spacing-sm);
}

.ct-canvas-container {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
}

.ct-canvas-container canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.ct-transfer-curve {
    flex: 1;
    aspect-ratio: 1;
    max-height: 300px;
}

.ct-gr-meter {
    width: 60px;
    height: 300px;
    flex-shrink: 0;
}

.ct-envelope {
    width: 100%;
    height: 120px;
}

/* ===========================================
   Quiz UI
   =========================================== */

.ct-quiz-compare {
    padding: var(--spacing-sm) 0;
}

.ct-quiz-compare.hidden {
    display: none !important;
}

.ct-compare-row {
    display: flex;
    gap: var(--spacing-sm);
}

.ct-compare-panel {
    flex: 1;
}

.ct-compare-label {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.ct-compare-canvas {
    height: 130px;
}

.ct-quiz-answer-area {
    padding: var(--spacing-sm) 0;
}

.ct-quiz-answer-area.hidden {
    display: none !important;
}

.ct-quiz-answer-group {
    margin-bottom: var(--spacing-xs);
}

.ct-quiz-answer-label {
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.ct-quiz-answer-buttons {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.ct-quiz-submit {
    display: flex;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) 0;
}

.ct-quiz-submit.hidden {
    display: none !important;
}

.ct-result {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.ct-result.hidden {
    display: none !important;
}

.ct-result.correct {
    background: color-mix(in srgb, var(--color-success) 15%, transparent);
    color: var(--color-success);
}

.ct-result.incorrect {
    background: color-mix(in srgb, var(--color-error) 15%, transparent);
    color: var(--color-error);
}

/* ===========================================
   Multi-track controls
   =========================================== */

.ct-multitrack-controls {
    display: flex;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.ct-multitrack-controls.hidden {
    display: none !important;
}

.ct-track-loading {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.ct-track-loading.hidden {
    display: none !important;
}

.ct-mixer {
    display: flex;
    gap: 2px;
}

.ct-channel-strip {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    width: 56px;
}

.ct-channel-label {
    font-size: 0.5625rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
}

.ct-channel-ms {
    display: flex;
    gap: 2px;
}

.ct-channel-btn {
    width: 18px;
    height: 18px;
    padding: 0;
    font-size: 0.5rem;
    font-weight: 700;
    font-family: inherit;
    border: 1px solid var(--color-border);
    border-radius: 2px;
    background: var(--color-control-bg);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-transform: uppercase;
}

.ct-channel-btn.muted {
    background: var(--color-warning);
    border-color: var(--color-warning);
    color: white;
}

.ct-channel-btn.soloed {
    background: #eab308;
    border-color: #eab308;
    color: white;
}

.ct-channel-silenced {
    opacity: 0.4;
}

.ct-fader-wrap {
    position: relative;
    width: 28px;
    height: 100px;
}

.ct-channel-meter {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 0;
    background: var(--color-success);
    border-radius: 1px;
    transition: height 60ms linear;
    opacity: 0.5;
}

.ct-channel-fader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-90deg);
    width: 100px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-border);
    border-radius: 2px;
    cursor: pointer;
}

.ct-channel-fader::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 10px;
    height: 16px;
    border-radius: 2px;
    background: var(--color-text-muted);
    border: none;
    cursor: pointer;
}

.ct-channel-fader::-moz-range-thumb {
    width: 10px;
    height: 16px;
    border-radius: 2px;
    background: var(--color-text-muted);
    border: none;
    cursor: pointer;
}

[data-theme="dark"] .ct-channel-fader::-webkit-slider-thumb {
    background: #94a3b8;
}

[data-theme="dark"] .ct-channel-fader::-moz-range-thumb {
    background: #94a3b8;
}

.ct-stereo-viz-container {
    flex: 1;
    min-width: 0;
    height: 108px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--color-card-bg);
}

.ct-stereo-viz-container canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* ===========================================
   Compression Guide (collapsible)
   =========================================== */

.ct-guide summary {
    cursor: pointer;
    list-style: none;
}

.ct-guide summary::-webkit-details-marker {
    display: none;
}

.ct-guide summary .card-title::after {
    content: ' +';
    font-weight: 400;
    color: var(--color-text-muted);
}

.ct-guide[open] summary .card-title::after {
    content: ' -';
}

.ct-guide blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--spacing-sm);
    margin: var(--spacing-xs) 0 var(--spacing-md) 0;
    color: var(--color-text-muted);
    font-style: italic;
    font-size: 0.875rem;
    line-height: 1.6;
}

.ct-guide h3 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

/* ===========================================
   Demo button
   =========================================== */

.ct-demo-btn.running {
    background: var(--color-error);
    border-color: var(--color-error);
    color: white;
}

.ct-demo-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.ct-demo-label {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* ===========================================
   Two-column layout (wide screens)
   =========================================== */

@media (min-width: 1000px) {
    .ct-app {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }

    .ct-toolbar {
        grid-column: 1 / -1;
    }

    .ct-test-indicator {
        grid-column: 1 / -1;
    }

    .ct-controls-card {
        grid-column: 1;
        align-self: start;
    }

    .ct-viz-container {
        grid-column: 2;
        align-self: start;
    }

    .ct-guide {
        grid-column: 1 / -1;
    }

    .ct-transfer-curve {
        max-height: none;
    }

    .ct-gr-meter {
        height: auto;
        align-self: stretch;
    }
}

/* ===========================================
   Responsive
   =========================================== */

@media (max-width: 900px) {
    .ct-viz-top {
        flex-direction: column;
    }

    .ct-transfer-curve {
        max-height: 250px;
    }

    .ct-gr-meter {
        width: 100%;
        height: 40px;
    }
}

@media (max-width: 768px) {
    .ct-toolbar-btn {
        padding: 5px 10px;
        font-size: 0.75rem;
    }

    .ct-toolbar-label {
        width: 40px;
        font-size: 0.5625rem;
    }

    .ct-param-label {
        width: 50px;
        font-size: 0.5625rem;
    }

    .ct-discrete-buttons {
        padding-left: 62px;
    }

    .ct-discrete-btn {
        padding: 3px 8px;
        font-size: 0.625rem;
    }

    .ct-quiz-row {
        gap: var(--spacing-sm);
    }
}