:root {
    --kef-purple: #8b5cf6;
    --kef-purple-light: #a78bfa;
    --kef-purple-deep: #6d28d9;
    --kef-purple-glow: rgba(139, 92, 246, 0.15);
    --kef-warm: #c4b5fd;
    --control-bg: #141414;
    --control-border: #2a2a2a;
    --surface-elevated: #161616;
    --surface-sunken: #0d0d0d;
}

.dark-theme {
    --text-primary: #f0ecf8;
    --text-secondary: #8a839a;
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --card-bg: #141414;
    --border-color: #1f1f1f;
    --secondary-bg: #1a1a1a;
    --secondary-bg-hover: #2a2a2a;
    background: #0a0a0a;
    color: #f0ecf8;
    font-family: 'Sora', -apple-system, BlinkMacSystemFont, sans-serif;
}

.dark-theme h1,
.dark-theme h2,
.dark-theme h3,
.dark-theme h4,
.dark-theme h5,
.dark-theme h6 {
    color: var(--text-primary);
}

.dark-theme p {
    color: var(--text-secondary);
}

.dark-theme .nav-links a {
    color: var(--text-secondary);
}

.dark-theme .nav-links a:hover {
    color: var(--text-primary);
}

/* Header capsule styling */
.dark-theme header {
    background: transparent;
}

.dark-theme nav {
    background: rgba(20, 20, 20, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 999px;
    padding: 12px 24px;
    margin: 20px 20px 20px auto;
    width: fit-content;
    border: 1px solid rgba(139, 92, 246, 0.1);
}

.dark-theme .nav-links {
    gap: 24px;
}

.dark-theme .nav-links a {
    color: rgba(255, 255, 255, 0.6);
    font-weight: 500;
    transition: color 0.2s ease;
    font-size: 0.9rem;
    letter-spacing: 0.01em;
}

.dark-theme .nav-links a:hover {
    color: rgba(255, 255, 255, 1);
}

/* ── Hero ─────────────────────────────── */

.hero {
    padding: var(--spacing-xl) var(--spacing-lg);
    padding-top: calc(var(--spacing-xl) + 40px);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero > * {
    position: relative;
    z-index: 1;
}

.speaker-control-demo {
    margin: 0 auto var(--spacing-xl);
    max-width: 400px;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.menubar-mockup {
    background: var(--control-bg);
    border: 1px solid var(--control-border);
    border-radius: 14px;
    overflow: hidden;
    box-shadow:
        0 10px 40px rgba(0, 0, 0, 0.5),
        0 0 80px rgba(139, 92, 246, 0.06);
}

.menubar {
    background: #1a1a1a;
    padding: 8px 16px;
    text-align: right;
    border-bottom: 1px solid var(--control-border);
}

.menubar-icon {
    font-size: 16px;
    opacity: 0.8;
    color: var(--kef-purple-light);
    display: inline-flex;
    align-items: center;
}

.menubar-icon svg {
    width: 16px;
    height: 16px;
}

.control-panel {
    padding: 20px;
    color: #ffffff;
}

.now-playing {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.album-art {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--kef-purple-deep), var(--kef-purple-light));
    border-radius: 10px;
    flex-shrink: 0;
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.3);
}

.track-info {
    flex: 1;
    text-align: left;
}

.track-title {
    font-weight: 600;
    margin-bottom: 4px;
    color: #ffffff;
    font-size: 15px;
}

.artist {
    color: #6b6b6b;
    font-size: 13px;
    margin-bottom: 10px;
}

.progress-bar {
    height: 3px;
    background: var(--control-border);
    border-radius: 2px;
    overflow: hidden;
}

.progress {
    height: 100%;
    width: 65%;
    background: linear-gradient(90deg, var(--kef-purple), var(--kef-purple-light));
    border-radius: 2px;
}

.volume-control {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.volume-icon {
    color: var(--kef-purple-light);
    display: inline-flex;
    align-items: center;
}

.volume-icon svg {
    width: 18px;
    height: 18px;
}

.volume-slider {
    flex: 1;
    height: 32px;
    display: flex;
    align-items: center;
}

.volume-track {
    width: 100%;
    height: 5px;
    background: var(--control-border);
    border-radius: 3px;
    position: relative;
}

.volume-fill {
    width: 65%;
    height: 100%;
    background: linear-gradient(90deg, var(--kef-purple), var(--kef-purple-light));
    border-radius: 3px;
}

.volume-thumb {
    position: absolute;
    left: 65%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 14px;
    height: 14px;
    background: white;
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3), 0 0 8px rgba(139, 92, 246, 0.3);
}

.volume-value {
    color: #6b6b6b;
    font-size: 13px;
    min-width: 30px;
    font-family: 'JetBrains Mono', monospace;
}

.source-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.source-btn {
    padding: 8px 16px;
    background: var(--control-border);
    border: none;
    border-radius: 8px;
    color: #6b6b6b;
    font-size: 13px;
    font-family: 'Sora', sans-serif;
    cursor: pointer;
    transition: all 0.2s;
}

.source-btn:hover {
    background: #333;
    color: #999;
}

.source-btn.active {
    background: var(--kef-purple);
    color: white;
    box-shadow: 0 2px 12px rgba(139, 92, 246, 0.4);
}

.app-logo {
    width: 110px;
    height: 110px;
    margin-bottom: var(--spacing-md);
}

h1 {
    letter-spacing: -0.03em;
    font-weight: 700;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.primary-btn,
.secondary-btn,
.btn-secondary {
    padding: 14px 28px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: 'Sora', sans-serif;
}

.primary-btn {
    background: var(--kef-purple);
    color: white;
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.3);
}

.primary-btn:hover {
    background: var(--kef-purple-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
}

.secondary-btn,
.btn-secondary {
    background: var(--secondary-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.secondary-btn:hover,
.btn-secondary:hover {
    background: var(--secondary-bg-hover);
    border-color: rgba(139, 92, 246, 0.3);
}

.github-icon {
    width: 20px;
    height: 20px;
}

/* ── Hero Meta (replaces badges) ──────── */

.hero-meta {
    display: flex;
    gap: 12px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.meta-tag {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.meta-divider {
    color: rgba(139, 92, 246, 0.4);
    font-size: 0.85rem;
}

/* ── Features ─────────────────────────── */

.features {
    padding: var(--spacing-xl) var(--spacing-lg);
    position: relative;
    background: var(--surface-sunken);
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(139, 92, 246, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.features h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.feature-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
}

.feature {
    background: var(--card-bg);
    padding: var(--spacing-lg);
    border-radius: 14px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    width: calc((100% - 2 * var(--spacing-lg)) / 3);
    box-sizing: border-box;
}

.feature::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--kef-purple), var(--kef-purple-light));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature:hover {
    border-color: rgba(139, 92, 246, 0.2);
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.feature:hover::after {
    opacity: 1;
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.15);
    margin-bottom: var(--spacing-md);
    color: var(--kef-purple-light);
    transition: all 0.3s ease;
}

.feature:hover .feature-icon {
    background: rgba(139, 92, 246, 0.12);
    border-color: rgba(139, 92, 246, 0.3);
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.15);
}

.feature h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
    font-weight: 600;
}

/* ── Showcase / How it Works ──────────── */

.showcase {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--surface-elevated);
    position: relative;
}

.showcase::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.2), transparent);
}

.showcase h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.setup-steps {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.step {
    text-align: center;
    max-width: 200px;
}

.step-number {
    width: 48px;
    height: 48px;
    background: transparent;
    color: var(--kef-purple-light);
    border: 2px solid rgba(139, 92, 246, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 600;
    margin: 0 auto var(--spacing-sm);
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.3s ease;
}

.step:hover .step-number {
    background: var(--kef-purple);
    color: white;
    border-color: var(--kef-purple);
    box-shadow: 0 0 24px rgba(139, 92, 246, 0.3);
}

.step h4 {
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.step p {
    color: var(--text-secondary);
    font-size: 14px;
}

.mini-player-demo {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.mini-player-demo h3 {
    margin-bottom: var(--spacing-md);
    color: var(--kef-warm);
    font-weight: 600;
}

.mini-player-mockup {
    margin-bottom: var(--spacing-md);
}

.mini-player-window {
    background: var(--control-bg);
    border: 1px solid var(--control-border);
    border-radius: 14px;
    padding: 16px;
    display: inline-flex;
    align-items: center;
    gap: 16px;
    box-shadow:
        0 4px 20px rgba(0, 0, 0, 0.3),
        0 0 40px rgba(139, 92, 246, 0.05);
}

.mini-album-art {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--kef-purple-deep), var(--kef-purple-light));
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(139, 92, 246, 0.3);
}

.mini-track-info {
    text-align: left;
}

.mini-title {
    font-weight: 600;
    margin-bottom: 2px;
    color: #ffffff;
    font-size: 14px;
}

.mini-artist {
    color: #6b6b6b;
    font-size: 13px;
}

.mini-controls {
    display: flex;
    gap: 6px;
}

.mini-controls button {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--control-border);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mini-controls button:hover {
    background: var(--kef-purple);
    color: white;
}

/* ── Compatible Speakers ──────────────── */

.compatibility {
    padding: var(--spacing-xl) var(--spacing-lg);
    position: relative;
    background: var(--surface-sunken);
}

.compatibility::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 70% 30%, rgba(139, 92, 246, 0.05) 0%, transparent 60%);
    pointer-events: none;
}

.compatibility h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.speaker-list {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    position: relative;
}

.speaker-model {
    background: var(--card-bg);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: 14px;
    border: 1px solid var(--border-color);
    text-align: center;
    min-width: 220px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.speaker-model::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--kef-purple-light), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.speaker-model:hover {
    border-color: rgba(139, 92, 246, 0.25);
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4), 0 0 40px rgba(139, 92, 246, 0.08);
}

.speaker-model:hover::before {
    opacity: 1;
}

.speaker-model h4 {
    color: var(--kef-purple-light);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.speaker-model p {
    font-size: 0.9rem;
}

/* ── Download ─────────────────────────── */

.download {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--surface-elevated);
    position: relative;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(139, 92, 246, 0.2), transparent);
}

.download h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

.download-card {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: 14px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s ease;
}

.download-card:hover {
    border-color: rgba(139, 92, 246, 0.2);
}

.download-card h3 {
    margin-bottom: var(--spacing-sm);
}

.download-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.download-link {
    display: inline-block;
    padding: 12px 24px;
    background: var(--kef-purple);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 500;
    transition: all 0.25s ease;
    font-family: 'Sora', sans-serif;
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.3);
}

.download-link:hover {
    background: var(--kef-purple-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
}

.secondary-link {
    color: var(--kef-purple-light);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.secondary-link:hover {
    color: var(--kef-warm);
}

.requirements {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: 14px;
    border: 1px solid var(--border-color);
}

.requirements h4 {
    margin-bottom: var(--spacing-md);
}

.requirements ul {
    list-style: none;
    padding: 0;
}

.requirements li {
    padding: var(--spacing-xs) 0;
    padding-left: 24px;
    position: relative;
    color: var(--text-secondary);
}

.requirements li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--kef-purple-light);
    font-weight: 600;
}

/* ── Final CTA ────────────────────────── */

.final-cta {
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    background: var(--surface-sunken);
    position: relative;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 300px;
    background: radial-gradient(ellipse, rgba(139, 92, 246, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.final-cta h2 {
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.final-cta p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
}

/* ── Footer ───────────────────────────── */

footer {
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    border-top: 1px solid var(--border-color);
}

footer p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.dark-theme footer {
    border-top-color: #1f1f1f;
}

.dark-theme footer p {
    color: #555;
}

footer a {
    color: var(--kef-purple-light);
    text-decoration: none;
    transition: color 0.2s ease;
}

footer a:hover {
    color: var(--kef-warm);
}

/* ── Responsive ───────────────────────── */

@media (max-width: 768px) {
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .setup-steps {
        gap: var(--spacing-lg);
    }

    .speaker-control-demo {
        max-width: 100%;
    }

    .mini-player-window {
        flex-wrap: wrap;
        justify-content: center;
    }

    .dark-theme nav {
        margin: 10px 10px 10px auto;
        padding: 10px 20px;
        width: auto;
        max-width: calc(100% - 20px);
    }

    .dark-theme .nav-links {
        gap: 16px;
        font-size: 14px;
    }

    .hero-meta {
        gap: 8px;
    }
}