/* ============================================
   TONGUE DRUM — Scale Landing Pages Styles
   ============================================ */

/* ========== RESET & BASE ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg-dark: #050510;
    --bg-card: rgba(8, 12, 30, 0.72);
    --glass-border: rgba(100, 140, 200, 0.13);
    --text-1: rgba(255, 255, 255, 0.88);
    --text-2: rgba(255, 255, 255, 0.70);
    --text-3: rgba(255, 255, 255, 0.52);
    --accent: #5ba8ff;
    --accent-glow: rgba(91, 168, 255, 0.20);
    --accent-warm: #a78bfa;
    --radius: 14px;
    --radius-sm: 10px;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg-dark);
    color: var(--text-1);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Starfield background */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(91, 168, 255, 0.04) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 80%, rgba(167, 139, 250, 0.04) 0%, transparent 60%),
        radial-gradient(ellipse at 50% 50%, rgba(5, 5, 20, 0.8) 0%, transparent 100%);
    pointer-events: none;
    z-index: 0;
}

/* ========== LAYOUT ========== */
.page-wrapper {
    position: relative;
    z-index: 1;
    max-width: 860px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

/* ========== SITE HEADER ========== */
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 56px;
    gap: 12px;
    flex-wrap: wrap;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-1);
    font-weight: 600;
    font-size: 16px;
    letter-spacing: 0.3px;
    transition: opacity 0.2s;
}
.site-logo:hover { opacity: 0.8; }

.site-logo svg {
    opacity: 0.6;
    flex-shrink: 0;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.header-nav a {
    color: var(--text-3);
    text-decoration: none;
    font-size: 13px;
    padding: 4px 8px;
    border-radius: 6px;
    transition: color 0.2s, background 0.2s;
}
.header-nav a:hover {
    color: var(--text-2);
    background: rgba(255, 255, 255, 0.05);
}
.header-nav .play-link {
    color: var(--accent);
    border: 1px solid rgba(91, 168, 255, 0.25);
    padding: 6px 14px;
}
.header-nav .play-link:hover {
    background: var(--accent-glow);
    color: var(--accent);
}

/* ========== HERO ========== */
.scale-hero {
    text-align: center;
    margin-bottom: 56px;
}

.scale-badge {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-glow);
    border: 1px solid rgba(91, 168, 255, 0.2);
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 20px;
}

.scale-hero h1 {
    font-size: clamp(28px, 5vw, 44px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff 30%, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.scale-hero .subtitle {
    font-size: 17px;
    color: var(--text-2);
    max-width: 560px;
    margin: 0 auto 36px;
    line-height: 1.65;
}

/* ========== DRUM VISUAL ========== */
.drum-visual {
    display: flex;
    justify-content: center;
    margin-bottom: 36px;
}

.drum-svg-wrap {
    position: relative;
    width: 180px;
    height: 180px;
}

.drum-svg-wrap svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 30px rgba(91, 168, 255, 0.25));
    animation: gentle-pulse 4s ease-in-out infinite;
}

@keyframes gentle-pulse {
    0%, 100% { opacity: 0.85; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.03); }
}

/* ========== PLAY BUTTON ========== */
.play-cta-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.play-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, rgba(91, 168, 255, 0.18), rgba(91, 168, 255, 0.08));
    border: 1.5px solid rgba(91, 168, 255, 0.35);
    color: var(--accent);
    text-decoration: none;
    font-family: inherit;
    font-size: 16px;
    font-weight: 600;
    padding: 14px 32px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.2px;
}
.play-btn:hover {
    background: linear-gradient(135deg, rgba(91, 168, 255, 0.28), rgba(91, 168, 255, 0.14));
    border-color: rgba(91, 168, 255, 0.55);
    transform: translateY(-1px);
    box-shadow: 0 8px 28px rgba(91, 168, 255, 0.2);
}
.play-btn:active { transform: scale(0.97); }

.play-btn-hint {
    font-size: 12px;
    color: var(--text-3);
}

/* ========== NOTES DISPLAY ========== */
.notes-strip {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin: 28px 0 0;
}

.note-pill {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-2);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    padding: 5px 12px;
    border-radius: 20px;
    letter-spacing: 0.5px;
    font-variant-numeric: tabular-nums;
}

.note-pill.root {
    color: var(--accent);
    background: var(--accent-glow);
    border-color: rgba(91, 168, 255, 0.25);
}

/* ========== CONTENT SECTIONS ========== */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

@media (max-width: 600px) {
    .content-grid { grid-template-columns: 1fr; }
}

.content-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 24px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.content-card.full-width {
    grid-column: 1 / -1;
}

.content-card h2 {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.8px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 14px;
}

.content-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 10px;
    line-height: 1.35;
}

.content-card p {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.72;
    margin-bottom: 12px;
}
.content-card p:last-child { margin-bottom: 0; }

.content-card ul {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.content-card li {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.6;
    padding-left: 16px;
    position: relative;
}

.content-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.6;
}

.content-card strong {
    color: var(--text-1);
    font-weight: 600;
}

/* ========== INTERVAL TABLE ========== */
.interval-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.interval-table th {
    text-align: left;
    color: var(--text-3);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.6px;
    text-transform: uppercase;
    padding: 6px 10px 8px;
    border-bottom: 1px solid var(--glass-border);
}
.interval-table td {
    color: var(--text-2);
    padding: 7px 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.interval-table tr:last-child td { border-bottom: none; }
.interval-table td:first-child {
    color: var(--accent);
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

/* ========== STAT BLOCKS ========== */
.stat-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.stat-item {
    flex: 1;
    min-width: 120px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    text-align: center;
}

.stat-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 11px;
    color: var(--text-3);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* ========== RELATED SCALES ========== */
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
    margin-top: 4px;
}

.related-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    text-decoration: none;
    transition: all 0.2s;
    display: block;
}
.related-card:hover {
    background: rgba(91, 168, 255, 0.06);
    border-color: rgba(91, 168, 255, 0.2);
    transform: translateY(-2px);
}

.related-card-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 4px;
}

.related-card-desc {
    font-size: 12px;
    color: var(--text-3);
    line-height: 1.5;
}

/* ========== FAQ SECTION ========== */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    /* Styled via child .faq-question and .faq-answer */
}

.faq-question {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 6px;
}

.faq-answer {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.7;
}

/* ========== BREADCRUMB ========== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-3);
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text-3);
    text-decoration: none;
    transition: color 0.2s;
}
.breadcrumb a:hover { color: var(--text-2); }

.breadcrumb-sep {
    opacity: 0.4;
}

.breadcrumb span:last-child {
    color: var(--text-2);
}

/* ========== FOOTER ========== */
.site-footer {
    margin-top: 72px;
    padding-top: 28px;
    border-top: 1px solid var(--glass-border);
}

.footer-scales {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.footer-scales a {
    color: var(--text-3);
    text-decoration: none;
    font-size: 13px;
    padding: 4px 10px;
    border-radius: 6px;
    border: 1px solid transparent;
    transition: all 0.2s;
}
.footer-scales a:hover {
    color: var(--text-2);
    border-color: var(--glass-border);
    background: rgba(255, 255, 255, 0.04);
}
.footer-scales a.active-scale {
    color: var(--accent);
    border-color: rgba(91, 168, 255, 0.2);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.footer-copy {
    font-size: 12px;
    color: var(--text-3);
}

.footer-main-link {
    font-size: 13px;
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    opacity: 0.8;
    transition: opacity 0.2s;
}
.footer-main-link:hover { opacity: 1; }

/* ========== ALL SCALES PAGE ========== */
.scales-intro {
    margin-bottom: 48px;
}

.scales-intro h1 {
    font-size: clamp(26px, 4.5vw, 40px);
    font-weight: 700;
    margin-bottom: 14px;
    background: linear-gradient(135deg, #fff 30%, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.scales-intro p {
    font-size: 15px;
    color: var(--text-2);
    line-height: 1.7;
    max-width: 640px;
    margin-bottom: 12px;
}

.scales-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 48px;
}

.scale-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 24px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    text-decoration: none;
    display: block;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.scale-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--card-accent, var(--accent));
    opacity: 0.5;
    transition: opacity 0.2s;
}

.scale-card:hover {
    border-color: rgba(91, 168, 255, 0.25);
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.scale-card:hover::before { opacity: 1; }

.scale-card-tag {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 8px;
}

.scale-card-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 8px;
    line-height: 1.2;
}

.scale-card-notes {
    font-size: 12px;
    color: var(--accent);
    font-family: 'Inter', monospace;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    font-weight: 500;
}

.scale-card-desc {
    font-size: 13px;
    color: var(--text-2);
    line-height: 1.65;
    margin-bottom: 16px;
}

.scale-card-link {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    opacity: 0.7;
    letter-spacing: 0.3px;
    transition: opacity 0.2s;
}
.scale-card:hover .scale-card-link { opacity: 1; }

/* ========== MOOD TAGS ========== */
.mood-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 12px;
}

.mood-tag {
    font-size: 11px;
    color: var(--text-3);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    padding: 3px 10px;
    border-radius: 12px;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 640px) {
    .page-wrapper { padding: 0 16px 60px; }
    .site-header { margin-bottom: 36px; }
    .scale-hero { margin-bottom: 36px; }
    .content-grid { gap: 14px; }
    .content-card { padding: 18px; }
    .scales-list { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr 1fr; }
    .stat-row { gap: 10px; }
}

@media (max-width: 400px) {
    .related-grid { grid-template-columns: 1fr; }
}