/* ============================================
   LOVELACE MUSIC PAGE
   ============================================ */

/* Ada Lovelace color theme */
:root {
    --color-primary: #8B4545;
    --color-accent: #6B3535;
    --color-primary-rgb: 139, 69, 69;
    --gradient-brand: linear-gradient(135deg, #8B4545 0%, #6B3535 100%);
}

.lovelace-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 20px 72px;
}

.page-hero {
    max-width: 820px;
    margin: 36px auto 42px;
    text-align: center;
}

.lovelace-page-title {
    margin: 6px 0 10px;
}

.page-kicker,
.lesson-era {
    margin: 0;
    color: #d58f52;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
}

.page-subtitle {
    max-width: 680px;
    margin: 0 auto;
    color: var(--color-text-muted);
    font-size: 1.08rem;
}

.lovelace-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lovelace-muted-text {
    color: var(--color-text-muted);
}

.intro-box {
    box-sizing: border-box;
    width: 100%;
    max-width: 840px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 0 auto 30px;
    text-align: left;
}

.history-section,
.lesson-workbench,
.sources {
    box-sizing: border-box;
    width: 100%;
    max-width: 840px;
    margin: 48px auto;
}

.section-heading {
    margin-bottom: 20px;
    text-align: center;
}

.section-heading h2 {
    margin: 5px 0 0;
}

.music-timeline {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 28px 0;
    margin: 0;
    padding: 0 0 12px;
    list-style: none;
}

.music-timeline li {
    flex: 1 1 240px;
    max-width: 300px;
    position: relative;
    min-height: 185px;
    padding: 34px 18px 14px 0;
    border-top: 2px solid var(--color-border);
}

.music-timeline li::before {
    position: absolute;
    top: -7px;
    left: 0;
    width: 12px;
    height: 12px;
    border: 2px solid #111;
    border-radius: 50%;
    background: #d58f52;
    content: '';
}

.music-timeline time,
.music-timeline strong,
.music-timeline span {
    display: block;
}

.music-timeline time {
    color: #d58f52;
    font-family: 'Courier New', monospace;
    font-weight: 700;
}

.music-timeline strong {
    margin: 6px 0;
}

.music-timeline span {
    color: var(--color-text-muted);
    font-size: 0.88rem;
    line-height: 1.5;
}

.lesson-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-bottom: 1px solid var(--color-border);
}

.lesson-tabs button,
.waveform-choices button {
    min-height: 48px;
    border: 1px solid var(--color-border);
    border-radius: 0;
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    font: inherit;
    font-weight: 600;
}

.lesson-tabs button[aria-selected="true"] {
    border-bottom: 3px solid #d58f52;
    color: var(--color-text);
    background: rgba(213, 143, 82, 0.08);
}

.lesson-tabs button:focus-visible,
.waveform-choices button:focus-visible,
.product-cta:focus-visible,
.btn:focus-visible {
    outline: 3px solid #7dd3fc;
    outline-offset: 2px;
}

.lesson-layout {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(260px, 1fr);
    gap: 24px;
    padding-top: 24px;
    justify-content: center;
}

.lesson-content,
.shared-controls {
    min-width: 0;
}

.lesson-panel {
    box-sizing: border-box;
    width: 100%;
    max-width: none;
    min-height: 320px;
    margin: 0 auto;
    padding: 24px;
    border-left: 3px solid #d58f52;
    background: var(--color-surface);
    text-align: center;
}

.lesson-panel[hidden] {
    display: none;
}

.lesson-panel h3 {
    margin: 8px 0;
    font-size: 1.45rem;
}

.lab-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 14px;
    margin-top: 22px;
}

.lesson-action {
    display: block;
    margin: 10px auto 0;
}

.shared-controls {
    box-sizing: border-box;
    width: 100%;
    align-self: start;
    margin: 0 auto;
    padding: 22px;
    border: 1px solid var(--color-border);
    background: var(--color-surface-deep);
    text-align: center;
}

.shared-controls h3 {
    margin-top: 0;
}

.waveform-choices {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin: 20px 0;
}

.waveform-choices button[aria-pressed="true"] {
    border-color: #4ade80;
    color: #4ade80;
    background: rgba(74, 222, 128, 0.08);
}

.historical-note,
.lesson-status {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.product-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    width: 100%;
    min-height: 52px;
    margin-top: 24px;
    padding: 10px 12px;
    border: 1px solid #d58f52;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text);
    cursor: pointer;
    font: inherit;
    font-weight: 700;
}

.product-cta span {
    color: #d58f52;
    font-family: 'Courier New', monospace;
    font-size: 0.72rem;
    text-transform: uppercase;
}

.midi-event-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    min-height: 80px;
    margin-top: 18px;
}

.midi-event {
    display: grid;
    flex: 1 1 112px;
    max-width: 150px;
    gap: 3px;
    min-width: 0;
    padding: 10px;
    border-left: 3px solid #4ade80;
    background: var(--color-surface-deep);
    text-align: center;
}

.midi-event span,
.midi-event code {
    color: var(--color-text-muted);
    font-size: 0.72rem;
}

.sources ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 24px;
    padding: 0;
    list-style-position: inside;
}

.sources li {
    flex: 1 1 240px;
    max-width: 320px;
    text-align: center;
}

#midiStudioDialog {
    width: min(480px, calc(100% - 32px));
    padding: 26px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface-deep);
    color: var(--color-text);
    text-align: center;
}

#midiStudioDialog form {
    display: flex;
    justify-content: center;
}

#midiStudioDialog::backdrop {
    background: rgba(0, 0, 0, 0.72);
}

.intro-box h2 {
    color: var(--color-primary);
    margin-top: 0;
}

.intro-box blockquote {
    border-left: 3px solid var(--color-primary);
    padding-left: 15px;
    margin: 15px 0;
    font-style: italic;
    color: var(--color-text-muted);
}

.control-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.control-group {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
}

.control-group h3 {
    margin-top: 0;
    color: var(--color-primary);
    font-size: 1.1rem;
}

.param-row {
    margin-bottom: 15px;
}

.param-row label {
    display: block;
    margin-bottom: 5px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.param-row input[type="number"],
.param-row select {
    width: 100%;
    padding: 8px;
    background: var(--color-surface-deep);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: inherit;
}

.param-row input[type="range"] {
    width: 100%;
}

.param-value {
    display: inline-block;
    color: var(--color-primary);
    font-weight: bold;
    margin-left: 10px;
}

.button-group {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 15px;
}

.btn {
    padding: 12px 24px;
    background: var(--color-accent);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    font-size: 0.95rem;
}

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

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

.btn-secondary {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.visualization-area {
    box-sizing: border-box;
    width: 100%;
    max-width: 840px;
    background: var(--color-surface-deep);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 0 auto 30px;
    text-align: center;
}

.canvas-container {
    width: 100%;
    height: 300px;
    background: #000;
    border-radius: var(--radius-sm);
    margin-top: 15px;
    position: relative;
}

#waveformCanvas {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-sm);
}

.sequence-display {
    box-sizing: border-box;
    width: 100%;
    max-width: 840px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    margin: 0 auto 30px;
    text-align: center;
}

.sequence-display.is-hidden {
    display: none;
}

.sequence-display h3 {
    color: var(--color-primary);
    margin-top: 0;
}

.bernoulli-sequence {
    font-family: 'Courier New', monospace;
    background: var(--color-surface-deep);
    padding: 15px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
    line-height: 1.6;
    color: var(--color-text);
    max-height: 200px;
    overflow-y: auto;
}

.musical-mapping {
    margin-top: 15px;
    padding: 15px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-primary);
}

.musical-mapping h4 {
    margin-top: 0;
    color: var(--color-primary);
    font-size: 0.95rem;
}

.mapping-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
}

.note-item {
    flex: 1 1 80px;
    max-width: 110px;
    padding: 8px;
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    text-align: center;
    border: 1px solid var(--color-border);
}

.note-name {
    font-weight: bold;
    color: var(--color-primary);
}

.note-duration {
    color: var(--color-text-muted);
    font-size: 0.75rem;
    margin-top: 3px;
}

.status-indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    margin-right: 8px;
    background: #666;
}

.status-indicator.playing {
    background: #4ade80;
    animation: pulse 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.etude-selector {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    margin-top: 15px;
}

.etude-btn {
    padding: 15px 10px;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition-base);
    font-weight: 600;
}

.etude-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-surface-hover);
}

.etude-btn.active {
    border-color: var(--color-primary);
    background: rgba(139, 69, 69, 0.2);
}

.preset-btn {
    background: var(--color-primary);
    color: white;
    border: 1px solid var(--color-border);
    font-weight: 700;
}

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

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

/* Inline-style replacements */
.page-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.page-subtitle {
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .control-panel {
        grid-template-columns: 1fr;
    }

    .lesson-tabs,
    .lesson-layout {
        grid-template-columns: 1fr;
    }

    .music-timeline {
        display: block;
        gap: 0;
        padding-left: 0;
    }

    .music-timeline li {
        max-width: none;
        min-height: 0;
        padding: 0 0 28px 30px;
        border-top: 0;
        border-left: 2px solid var(--color-border);
    }

    .music-timeline li::before {
        top: 2px;
        left: -7px;
    }

    .lesson-tabs button {
        border-bottom-width: 1px;
        text-align: left;
    }

    .lesson-tabs button[aria-selected="true"] {
        border-left: 3px solid #d58f52;
        border-bottom-width: 1px;
    }

    .lesson-panel {
        min-height: 0;
    }

    .waveform-choices {
        grid-template-columns: repeat(2, 1fr);
    }

    .canvas-container {
        height: 230px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .status-indicator.playing {
        animation: none;
    }
}