/* ===========================================
   Filter Identification - Project Styles
   =========================================== */

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

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

.fid-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 source+gain row and extras in teaching/quiz mode (they have their own source picker) */
.teaching-mode .fid-source-row,
.quiz-mode .fid-source-row,
.teaching-mode .fid-source-extras,
.quiz-mode .fid-source-extras {
    display: none !important;
}

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

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

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

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

.fid-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;
}

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

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

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

.fid-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;
}

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

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

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

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

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

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

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

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

.fid-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) */
.fid-source-extras {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

/* Override upload-area padding for compact version (inside toolbar) */
.upload-area.fid-source-extras {
    padding: var(--spacing-xs) 0;
}

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

/* Smaller play button for the compact toolbar */
.fid-play-sm {
    width: 32px;
    height: 32px;
}

/* Override playback-controls padding for compact version (inside toolbar) */
.playback-controls.fid-source-extras {
    padding: 6px 0;
}

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

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

.fid-teaching-controls.hidden {
    display: none;
}

.fid-quiz-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

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

.fid-quiz-controls.hidden {
    display: none;
}

/* Filter header + quiz compare: keep column layout (canvas spans full width) */
.fid-filter-header,
.fid-quiz-compare {
    flex-direction: column;
    align-items: stretch;
}

.fid-filter-header .fid-param-label {
    width: auto;
    padding-top: 0;
}

/* Filter header row (On/Bypass + label) */
.fid-filter-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}

.fid-filter-toggles {
    display: flex;
    align-items: center;
    gap: 3px;
}

/* Frequency response canvas */
.fid-canvas-container {
    position: relative;
    width: 100%;
    height: 160px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

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

/* Test indicator */
.fid-test-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 6px var(--spacing-sm);
    background: var(--color-accent-light);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-accent);
    animation: pulse-border 1.5s ease-in-out infinite;
}

.fid-test-indicator.hidden {
    display: none;
}

[data-theme="dark"] .fid-test-indicator {
    background: rgba(37, 99, 235, 0.15);
}

.fid-quiz-source {
    padding: 4px 6px;
    font-size: 0.75rem;
    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;
}

.fid-quiz-source:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.fid-dropdown-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.fid-dropdown-label.hidden {
    display: none;
}

.fid-score {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
}

.fid-score-label {
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

#quiz-score,
#quiz-streak {
    font-weight: 600;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
}

/* Duration controls */
.fid-duration-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.fid-duration-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.625rem;
    color: var(--color-text-muted);
    font-weight: 600;
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.fid-duration-input {
    width: 3rem;
    padding: 0.25rem 0.375rem;
    font-size: 0.75rem;
    font-family: inherit;
    font-weight: 500;
    text-align: center;
    background: var(--color-control-bg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
}

.fid-duration-input:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.fid-duration-input::-webkit-outer-spin-button,
.fid-duration-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.fid-duration-input[type=number] {
    -moz-appearance: textfield;
}

/* Selection card — tighter padding */
.fid-selection-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
}

/* Parameter group (type, freq, gain) */
.fid-param-group {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.fid-param-label {
    font-size: 0.625rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
    width: 50px;
    flex-shrink: 0;
    line-height: 1;
    padding-top: 8px;
}

/* Toggle button group */
.fid-button-group {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

/* Individual toggle button */
.fid-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1px;
    min-width: 64px;
    padding: 8px 14px;
    font-size: 0.875rem;
    font-weight: 500;
    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);
}

.fid-toggle:hover {
    border-color: var(--color-text-muted);
}

.fid-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.fid-toggle.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

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

.fid-toggle.disabled,
.fid-toggle:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}

/* Vowel hint text below frequency label */
.fid-toggle-main {
    font-size: 0.75rem;
}

.fid-toggle-hint {
    font-size: 0.5625rem;
    opacity: 0.65;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.fid-toggle.active .fid-toggle-hint {
    opacity: 0.85;
}

/* Quiz mode: hide hints */
.fid-app.quiz-mode .fid-toggle-hint {
    display: none;
}

/* Filter settings */
.fid-settings-group {
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--color-border);
    margin-top: 2px;
}

.fid-settings-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* Q readout */
.fid-q-readout {
    font-size: 0.75rem;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
    color: var(--color-text-muted);
    padding-top: 2px;
}

.fid-q-readout.hidden {
    display: none;
}

/* Hide settings and filter toggles in quiz mode */
.fid-app.quiz-mode .fid-settings-group {
    display: none;
}

.fid-app.quiz-mode .fid-filter-toggles {
    display: none;
}

.fid-app.quiz-mode .fid-mixer {
    display: none;
}

/* Quiz comparison split view */
.fid-quiz-compare.hidden {
    display: none;
}

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

.fid-compare-panel {
    flex: 1;
    min-width: 0;
}

.fid-compare-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.fid-compare-label.correct {
    color: var(--color-success);
}

.fid-compare-label.incorrect {
    color: var(--color-error);
}

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

/* Quiz answer submission */
.fid-quiz-submit {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--color-border);
}

.fid-quiz-submit.hidden {
    display: none;
}

/* Quiz result feedback */
.fid-result {
    padding: 6px var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
}

.fid-result.hidden {
    display: none;
}

.fid-result.correct {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--color-success);
    color: var(--color-success);
}

.fid-result.incorrect {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--color-error);
    color: var(--color-error);
}

[data-theme="dark"] .fid-result.correct {
    background: rgba(34, 197, 94, 0.15);
}

[data-theme="dark"] .fid-result.incorrect {
    background: rgba(239, 68, 68, 0.15);
}

/* Guide table */
.fid-guide-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
    margin: var(--spacing-sm) 0;
}

.fid-guide-table th,
.fid-guide-table td {
    padding: 0.375rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.fid-guide-table th {
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.fid-guide-table td:first-child {
    font-weight: 500;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace;
}

.fid-guide-table td:nth-child(2) {
    font-weight: 600;
    color: var(--color-accent);
}

/* Multi-track controls */
.fid-multitrack-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--color-border);
}

.fid-multitrack-controls.hidden {
    display: none;
}

/* Mixer */
/* Mixer: horizontal row of vertical channel strips */
.fid-mixer {
    display: flex;
    gap: 2px;
    justify-content: center;
    padding: var(--spacing-xs) 0;
}

/* Channel strip — vertical column */
.fid-channel-strip {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    width: 56px;
    padding: 8px 4px;
    border-radius: var(--radius-sm);
    background: var(--color-control-bg);
    border: 1px solid var(--color-border);
    transition: opacity var(--transition-fast);
}

.fid-channel-strip.fid-channel-silenced {
    opacity: 0.4;
}

/* Track label at top */
.fid-channel-label {
    font-size: 0.5625rem;
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
    line-height: 1.1;
    width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* M/S button row */
.fid-channel-ms {
    display: flex;
    gap: 2px;
}

.fid-channel-btn {
    width: 18px;
    height: 18px;
    padding: 0;
    font-size: 0.5rem;
    font-weight: 700;
    font-family: inherit;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 2px;
    color: var(--color-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.fid-channel-btn:hover {
    border-color: var(--color-text-muted);
}

.fid-channel-btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 1px;
}

.fid-mute-btn.active {
    background: var(--color-warning);
    border-color: var(--color-warning);
    color: #1a1a1a;
}

.fid-solo-btn.active {
    background: #facc15;
    border-color: #facc15;
    color: #1a1a1a;
}

/* Fader wrapper — gives the vertical slider a fixed height */
.fid-fader-wrap {
    position: relative;
    width: 28px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Level meter behind fader */
.fid-channel-meter {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 100%;
    border-radius: 2px;
    pointer-events: none;
}

/* Vertical fader — rotate a horizontal range input */
.fid-channel-fader {
    width: 100px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--color-border);
    border-radius: 2px;
    cursor: pointer;
    transform: rotate(-90deg);
    transform-origin: center center;
}

.fid-channel-fader::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 10px;
    border-radius: 2px;
    background: linear-gradient(to bottom, #d4d4d4, #a3a3a3);
    border: 1px solid #737373;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.fid-channel-fader::-moz-range-thumb {
    width: 16px;
    height: 10px;
    border-radius: 2px;
    background: linear-gradient(to bottom, #d4d4d4, #a3a3a3);
    border: 1px solid #737373;
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.fid-channel-fader:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

[data-theme="dark"] .fid-channel-strip {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .fid-channel-fader {
    background: rgba(255, 255, 255, 0.12);
}

[data-theme="dark"] .fid-channel-fader::-webkit-slider-thumb {
    background: linear-gradient(to bottom, #737373, #525252);
    border-color: #404040;
}

[data-theme="dark"] .fid-channel-fader::-moz-range-thumb {
    background: linear-gradient(to bottom, #737373, #525252);
    border-color: #404040;
}

.fid-track-loading {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
}

.fid-track-loading.hidden {
    display: none;
}

/* Stereo waveform visualization */
.fid-stereo-viz-container {
    position: relative;
    width: 100%;
    height: 100px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

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

/* Responsive */
@media (max-width: 768px) {
    .fid-toolbar {
        gap: var(--spacing-xs);
    }

    .fid-toolbar-btn {
        padding: 4px 8px;
        font-size: 0.6875rem;
    }

    .fid-toggle {
        min-width: 56px;
        padding: 5px 8px;
        font-size: 0.6875rem;
    }

    .fid-toggle-main {
        font-size: 0.6875rem;
    }

    .fid-toggle-hint {
        font-size: 0.5rem;
    }

    .fid-teaching-controls {
        flex-wrap: wrap;
    }

    .fid-quiz-controls {
        flex-wrap: wrap;
    }
}

/* ===========================================
   Info trigger spacing (override components-audio.css)
   =========================================== */

.fid-toolbar-group > .info-trigger,
.fid-param-group > .info-trigger,
.fid-filter-header-row > .info-trigger {
    margin-left: -8px;
    flex-shrink: 0;
    align-self: center;
}

.fid-param-group > .info-trigger {
    align-self: flex-start;
    margin-top: 8px;
}

/* ===========================================
   Demo Button (in mode toolbar row)
   =========================================== */

.fid-demo-btn {
    margin-left: auto;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-accent);
    background: none;
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-sm);
    padding: 4px 12px;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.fid-demo-btn:hover {
    background: var(--color-accent);
    color: #fff;
}

/* ===========================================
   Practice Demo Tour
   =========================================== */

.fid-tour-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    transition: opacity 0.2s;
}

.fid-tour-card {
    position: fixed;
    z-index: 1002;
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    max-width: 360px;
    width: calc(100vw - 32px);
    line-height: 1.6;
    font-size: 0.875rem;
    color: var(--color-text);
}

.fid-tour-card h3 {
    margin: 0 0 8px;
    font-size: 1rem;
    font-weight: 600;
}

.fid-tour-card p {
    margin: 0 0 12px;
}

.fid-tour-step {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.fid-tour-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

.fid-tour-actions button {
    padding: 6px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-family: inherit;
    cursor: pointer;
    border: 1px solid var(--color-border);
    background: var(--color-card-bg);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.fid-tour-actions button:hover {
    background: var(--color-bg);
}

.fid-tour-actions .fid-tour-next {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.fid-tour-actions .fid-tour-next:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
}

.fid-tour-highlight {
    position: relative;
    z-index: 1001;
    border-radius: 8px;
    box-shadow: 0 0 0 4px var(--color-accent), 0 0 0 9999px rgba(0, 0, 0, 0.6);
}