:root {
    --primary: #ff4d6d;
    --secondary: #c9184a;
    --accent: #ffca3a;
    --background: #0a0908;
    --text: #f8f9fa;
    --glass: rgba(255, 255, 255, 0.05);
    --border: rgba(255, 255, 255, 0.1);
    --pink-glow: rgba(255, 77, 109, 0.3);
    --card-bg: rgba(15, 12, 20, 0.85);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) var(--background);
}

html::-webkit-scrollbar {
    width: 6px;
}

html::-webkit-scrollbar-track {
    background: var(--background);
}

html::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 3px;
}

body {
    background-color: var(--background);
    color: var(--text);
    overflow-x: hidden;
    overflow-y: auto;
    min-height: 100vh;
}

/* ===== Canvas Container (3D Heart) ===== */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    transition: opacity 0.5s ease;
}

/* ===== Section Layout ===== */
.section {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* ===== Hero Section ===== */
.hero-section {
    min-height: 100vh;
}

#content {
    position: relative;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.glass-card {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    opacity: 0;
}

h1 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.accent {
    color: var(--primary);
    text-shadow: 0 0 10px var(--primary), 0 0 20px var(--primary), 0 0 40px var(--primary);
    animation: glow-text 2s infinite alternate ease-in-out;
}

@keyframes glow-text {
    from {
        text-shadow: 0 0 10px var(--primary), 0 0 20px var(--primary);
    }
    to {
        text-shadow: 0 0 20px var(--primary), 0 0 40px var(--primary), 0 0 60px var(--accent);
    }
}

p {
    font-size: 1.1rem;
    font-weight: 300;
    opacity: 0.8;
    margin-bottom: 30px;
    line-height: 1.6;
}

.heart-icon {
    font-size: 2rem;
    display: block;
    margin-top: 20px;
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

/* ===== Scroll Indicator ===== */
.scroll-indicator {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text);
    opacity: 0.7;
    transition: opacity 0.6s ease;
    pointer-events: none;
}

.scroll-indicator span {
    font-size: 0.85rem;
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.scroll-arrow {
    animation: bounce-down 2s infinite;
}

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

.scroll-indicator.hidden {
    opacity: 0;
}

/* ===== Music Control Panel ===== */
.music-panel {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(10, 9, 8, 0.6);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--border);
    border-radius: 30px;
    padding: 6px 6px 6px 6px;
    transition: all 0.3s ease;
}

.music-panel:hover {
    background: rgba(10, 9, 8, 0.8);
    border-color: rgba(255, 77, 109, 0.3);
}

.music-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: rgba(255, 77, 109, 0.15);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(255, 77, 109, 0.2);
    flex-shrink: 0;
}

.music-btn:hover {
    transform: scale(1.1);
    background: rgba(255, 77, 109, 0.3);
    box-shadow: 0 0 25px rgba(255, 77, 109, 0.4);
}

.music-btn.playing {
    animation: music-pulse 1.5s infinite;
    border-color: var(--primary);
}

@keyframes music-pulse {
    0%, 100% {
        box-shadow: 0 0 15px rgba(255, 77, 109, 0.3);
    }
    50% {
        box-shadow: 0 0 25px rgba(255, 77, 109, 0.6), 0 0 50px rgba(255, 77, 109, 0.2);
    }
}

.music-icon {
    font-size: 1.3rem;
    transition: transform 0.3s ease;
}

.music-btn.playing .music-icon {
    animation: spin-note 3s infinite linear;
}

@keyframes spin-note {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Volume Control */
.volume-control {
    display: flex;
    align-items: center;
    gap: 6px;
    padding-right: 10px;
}

.volume-label {
    font-size: 0.9rem;
    opacity: 0.7;
    user-select: none;
}

.volume-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 80px;
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(to right, var(--primary) 50%, rgba(255, 255, 255, 0.15) 50%);
    outline: none;
    cursor: pointer;
    transition: opacity 0.2s;
}

.volume-slider:hover {
    opacity: 1;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 0 8px rgba(255, 77, 109, 0.5);
    transition: transform 0.2s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.3);
}

.volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 8px rgba(255, 77, 109, 0.5);
}

.volume-slider::-moz-range-track {
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.15);
}

/* ===== Gallery Section ===== */
.gallery-section {
    min-height: auto;
    padding: 60px 20px 100px;
    position: relative;
}

.gallery-header {
    text-align: center;
    margin-bottom: 80px;
    opacity: 0;
    transform: translateY(30px);
}

.gallery-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.8rem;
    margin-bottom: 15px;
    letter-spacing: -0.5px;
}

.title-divider {
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    margin: 0 auto;
    border-radius: 2px;
}

/* ===== Pair Row: Photo + Lyrics Side by Side ===== */
.pair-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
    max-width: 1100px;
    margin: 0 auto 80px;
    padding: 0 20px;
    opacity: 0;
    transform: translateY(50px);
}

/* Alternate layout: lyrics on left, photo on right */
.pair-row.reverse {
    flex-direction: row-reverse;
}

.pair-photo {
    flex: 1;
    max-width: 480px;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(255, 77, 109, 0.08);
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.pair-photo:hover {
    transform: translateY(-6px);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 50px rgba(255, 77, 109, 0.15);
    border-color: rgba(255, 77, 109, 0.3);
}

.pair-photo img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.pair-photo:hover img {
    transform: scale(1.03);
}

.pair-lyrics {
    flex: 1;
    max-width: 480px;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.pair-lyrics:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.pair-lyrics img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.pair-lyrics:hover img {
    transform: scale(1.02);
}

.song-title {
    display: block;
    text-align: center;
    padding: 12px 15px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 300;
    color: var(--text);
    opacity: 0.7;
    letter-spacing: 0.5px;
    background: rgba(0, 0, 0, 0.3);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    transition: opacity 0.3s ease;
}

.pair-lyrics:hover .song-title {
    opacity: 1;
    color: var(--primary);
}

/* ===== Now Playing State ===== */
.pair-lyrics[data-song] {
    position: relative;
    cursor: pointer;
}

.pair-lyrics.now-playing {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(255, 77, 109, 0.4), 0 0 60px rgba(255, 77, 109, 0.15), 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: now-playing-glow 2s infinite ease-in-out;
}

@keyframes now-playing-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(255, 77, 109, 0.4), 0 0 60px rgba(255, 77, 109, 0.15), 0 20px 60px rgba(0, 0, 0, 0.5);
    }
    50% {
        box-shadow: 0 0 30px rgba(255, 77, 109, 0.6), 0 0 80px rgba(255, 77, 109, 0.25), 0 20px 60px rgba(0, 0, 0, 0.5);
    }
}

.pair-lyrics.now-playing .song-title {
    opacity: 1;
    color: var(--primary);
    background: rgba(255, 77, 109, 0.1);
}

.pair-lyrics.now-playing::after {
    content: '♫ Reproduciendo...';
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 77, 109, 0.85);
    color: #fff;
    font-family: 'Outfit', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 20px;
    letter-spacing: 0.5px;
    backdrop-filter: blur(8px);
    animation: badge-pulse 1.5s infinite ease-in-out;
    z-index: 10;
}

@keyframes badge-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ===== Final Message ===== */
.final-message {
    margin-top: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
}

.final-card {
    max-width: 500px;
    opacity: 0;
    transform: translateY(30px);
}

.final-card.visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

.final-hearts {
    font-size: 3rem;
    margin-bottom: 15px;
    animation: pulse 2s infinite ease-in-out;
}

.final-text {
    font-family: 'Playfair Display', serif;
    font-size: 2.2rem;
    margin-bottom: 15px;
}

.final-sub {
    font-size: 1.1rem;
    font-weight: 300;
    line-height: 1.8;
    opacity: 0.85;
    font-style: italic;
}

.final-infinity {
    font-size: 2.5rem;
    margin-top: 15px;
    color: var(--primary);
    animation: pulse 2.5s infinite ease-in-out;
}

/* ===== Floating Hearts ===== */
.floating-hearts {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
    overflow: hidden;
}

.float-heart {
    position: absolute;
    font-size: 1.2rem;
    animation: float-up linear forwards;
    opacity: 0;
}

@keyframes float-up {
    0% {
        opacity: 0;
        transform: translateY(100vh) rotate(0deg) scale(0.5);
    }
    10% {
        opacity: 0.8;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        opacity: 0;
        transform: translateY(-10vh) rotate(360deg) scale(1);
    }
}

/* ===== Responsiveness ===== */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    .glass-card {
        padding: 30px;
    }
    .gallery-title {
        font-size: 2rem;
    }

    /* Stack photo and lyrics vertically on mobile */
    .pair-row,
    .pair-row.reverse {
        flex-direction: column;
        gap: 20px;
        margin-bottom: 60px;
    }

    .pair-photo,
    .pair-lyrics {
        max-width: 100%;
        width: 100%;
    }

    .final-text {
        font-size: 1.8rem;
    }
    .music-btn {
        width: 44px;
        height: 44px;
        top: 15px;
        right: 15px;
    }
    .scroll-indicator span {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .gallery-header {
        margin-bottom: 40px;
    }
    .pair-row {
        padding: 0 10px;
        margin-bottom: 50px;
    }
}