/* ==========================================================================
   STYLE.CSS - THIỆP MỜI CƯỚI CAO CẤP (SONG HỶ ĐỎ TRUYỀN THỐNG & GOLD)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Alex+Brush&family=Cormorant+Garamond:ital,wght@0,400;0,600;0,700;1,400&family=Montserrat:wght@300;400;500;600;700&display=swap');
@import url('variables.css');

/* Global Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-warm);
    color: var(--color-text-main);
    line-height: 1.7;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

html.no-scroll,
body.no-scroll {
    overflow: hidden !important;
    touch-action: none;
}

/* Accessibility Focus Ring */
:focus-visible {
    outline: 2px solid var(--color-gold);
    outline-offset: 3px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg-warm);
}
::-webkit-scrollbar-thumb {
    background: var(--color-primary-light);
    border-radius: 4px;
}

/* Intro Invitation Screen & Opening Animation */
.intro-screen {
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at center, #8B0000 0%, #3B0000 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    text-align: center;
    padding: 20px;
    overflow: hidden;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

/* Background multiple floating slow 囍 symbols */
.intro-bg-symbols {
    position: absolute;
    inset: 0;
    pointer-events: none;
    user-select: none;
    overflow: hidden;
    z-index: 3;
}

.bg-xi {
    position: absolute;
    font-family: var(--font-heading);
    color: rgba(212, 175, 55, 0.3);
    animation: floatUpSlow linear infinite;
    bottom: -60px;
}

.xi-1 { left: 8%; font-size: 2.2rem; animation-duration: 9s; animation-delay: -2s; }
.xi-2 { left: 25%; font-size: 1.6rem; animation-duration: 12s; animation-delay: -5s; color: rgba(212, 175, 55, 0.25); }
.xi-3 { left: 42%; font-size: 3rem; animation-duration: 10s; animation-delay: -1s; }
.xi-4 { left: 60%; font-size: 2rem; animation-duration: 14s; animation-delay: -8s; color: rgba(212, 175, 55, 0.32); }
.xi-5 { left: 78%; font-size: 1.8rem; animation-duration: 11s; animation-delay: -4s; }
.xi-6 { left: 90%; font-size: 2.8rem; animation-duration: 13s; animation-delay: -7s; color: rgba(212, 175, 55, 0.28); }

@keyframes floatUpSlow {
    0% {
        transform: translateY(0) rotate(0deg) scale(0.9);
        opacity: 0;
    }
    15% {
        opacity: 0.85;
    }
    85% {
        opacity: 0.85;
    }
    100% {
        transform: translateY(-110vh) rotate(20deg) scale(1.1);
        opacity: 0;
    }
}

/* Red & Gold Invitation Card Content */
.intro-content {
    position: relative;
    z-index: 10;
    background: rgba(255, 253, 249, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 40px 25px;
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-gold);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5), 0 0 30px rgba(212, 175, 55, 0.25);
    max-width: 540px;
    width: 92%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.6s ease;
    overflow: hidden;
}

.intro-symbol-top {
    font-size: 2.8rem;
    color: var(--color-primary);
    margin-bottom: 10px;
    animation: floatY 3s ease-in-out infinite;
}

.intro-content .intro-title {
    font-family: var(--font-script);
    font-size: clamp(1.8rem, 5vw, 2.7rem);
    color: var(--color-primary);
    line-height: 1.2;
    margin-bottom: 8px;
    white-space: normal;
    word-break: break-word;
    padding: 0 5px;
}

.intro-content .intro-title .heart {
    font-size: 0.7em;
    color: #e74c3c;
    display: inline-block;
    animation: pulse 1.5s infinite;
}

.intro-content .intro-subtitle {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-gold-dark);
    margin-bottom: 25px;
}

.btn-open-invite {
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-dark));
    color: var(--color-primary-dark);
    font-family: var(--font-heading);
    font-weight: 700;
    border: 1px solid var(--color-gold-light);
    padding: 12px 32px;
    font-size: 1.1rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    box-shadow: var(--shadow-gold);
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.btn-open-invite:hover {
    transform: scale(1.06);
    box-shadow: 0 10px 25px rgba(212, 175, 55, 0.5);
    background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
}

/* Split Curtain Effect on opening */
.curtain {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 50%;
    background: var(--color-primary-dark);
    z-index: 2;
    transition: transform 0.9s cubic-bezier(0.77, 0, 0.175, 1);
}

.curtain-left { left: 0; border-right: 1px solid var(--color-gold); }
.curtain-right { right: 0; border-left: 1px solid var(--color-gold); }

/* Animation triggered state */
.intro-screen.opening .intro-content {
    transform: scale(1.15);
    opacity: 0;
}

.intro-screen.opening .curtain-left {
    transform: translateX(-100%);
}

.intro-screen.opening .curtain-right {
    transform: translateX(100%);
}

.intro-screen.hidden-intro {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
.preloader {
    position: fixed;
    inset: 0;
    background: var(--color-primary-dark);
    z-index: var(--z-loader);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--color-gold-light);
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-symbol {
    font-family: var(--font-script);
    font-size: 4rem;
    color: var(--color-gold);
    margin-bottom: 15px;
}

.preloader-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(212, 175, 55, 0.2);
    border-top-color: var(--color-gold);
    border-radius: 50%;
    animation: spin 1s infinite linear;
}

/* 2. Navigation Bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-navbar);
    padding: 18px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 253, 249, 0.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.25);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    padding: 12px 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.nav-brand {
    font-family: var(--font-script);
    font-size: 2.2rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 25px;
}

.nav-link {
    text-decoration: none;
    color: var(--color-text-main);
    font-size: 0.88rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
    color: var(--color-gold-dark);
}

/* 3. Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 140px 20px 80px;
    text-align: center;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1;
}

.hero-card {
    position: relative;
    z-index: 2;
    background: rgba(255, 253, 249, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 50px 35px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(212, 175, 55, 0.6);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
    max-width: 720px;
    width: 100%;
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-gold-dark);
    margin-bottom: 15px;
}

.hero-title {
    font-family: var(--font-script);
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    color: var(--color-primary);
    line-height: 1.2;
    margin-bottom: 20px;
    white-space: nowrap;
}

.hero-date {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: 8px;
}

.hero-lunar {
    font-style: italic;
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: var(--color-gold-light);
    font-size: 1.5rem;
    animation: bounce 2s infinite;
    cursor: pointer;
}

/* 4. Section Commons */
.section {
    padding: var(--spacing-section) 20px;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-tag {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-gold-dark);
    display: block;
    margin-bottom: 5px;
}

.section-title {
    font-family: var(--font-script);
    font-size: 3.8rem;
    color: var(--color-primary);
    line-height: 1.1;
}

.section-divider {
    color: var(--color-gold);
    font-size: 1.4rem;
    margin-top: 10px;
}

/* 5. Countdown Section */
.countdown-section {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
    color: #fff;
    text-align: center;
}

.countdown-section .section-title {
    color: var(--color-gold-light);
}

.countdown-section .section-tag {
    color: var(--color-gold);
}

.countdown-grid {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    max-width: 800px;
    margin: 0 auto;
}

.countdown-card {
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(212, 175, 55, 0.4);
    border-radius: var(--radius-md);
    padding: 25px;
    min-width: 120px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.countdown-number {
    font-family: var(--font-heading);
    font-size: 3.2rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
    display: block;
}

.countdown-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-text-light);
    margin-top: 10px;
}

/* 6. Couple / Groom & Bride Section */
.couple-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
    max-width: 1100px;
    margin: 0 auto;
}

.couple-card {
    background: var(--color-card-bg);
    border-radius: var(--radius-md);
    padding: 40px 30px;
    text-align: center;
    flex: 1 1 340px;
    max-width: 480px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(212, 175, 55, 0.3);
    transition: var(--transition-normal);
}

.couple-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.avatar-frame {
    width: 200px;
    height: 200px;
    margin: 0 auto 25px;
    border-radius: 50%;
    padding: 6px;
    background: linear-gradient(135deg, var(--color-gold), var(--color-primary));
    box-shadow: var(--shadow-gold);
}

.avatar-frame img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.couple-role {
    font-family: var(--font-heading);
    font-size: 1rem;
    letter-spacing: 2px;
    color: var(--color-gold-dark);
    font-weight: 700;
    text-transform: uppercase;
}

.couple-name {
    font-family: var(--font-script);
    font-size: 3rem;
    color: var(--color-primary);
    margin: 5px 0 15px;
}

.parents-info {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    border-top: 1px dashed rgba(212, 175, 55, 0.3);
    padding-top: 15px;
}

/* 7. Ceremony Section & Map Embed */
.ceremony-grid {
    display: flex;
    flex-direction: column;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.ceremony-card {
    background: var(--color-card-bg);
    border-radius: var(--radius-md);
    padding: 35px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(212, 175, 55, 0.35);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: center;
}

.ceremony-card.no-map {
    grid-template-columns: 1fr;
    max-width: 620px;
    margin: 0 auto;
}

.ceremony-info {
    text-align: left;
}

.ceremony-icon {
    font-size: 2.5rem;
    color: var(--color-gold);
    margin-bottom: 15px;
}

.ceremony-tag {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.ceremony-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--color-primary-dark);
    margin: 5px 0 10px;
}

.ceremony-time {
    color: var(--color-gold-dark);
    font-weight: 600;
    margin-bottom: 12px;
}

.ceremony-address {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.map-wrapper {
    width: 100%;
    height: 250px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid rgba(212, 175, 55, 0.3);
}

.map-wrapper iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

/* 8. Love Story Timeline */
.timeline-wrapper {
    position: relative;
    max-width: 850px;
    margin: 0 auto;
}

.timeline-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: linear-gradient(180deg, var(--color-gold), var(--color-primary));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 35px;
    margin-bottom: 45px;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
    text-align: left;
}

.timeline-badge {
    position: absolute;
    top: 15px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--color-gold);
    border: 4px solid #fff;
    box-shadow: var(--shadow-gold);
    z-index: 2;
}

.timeline-item:nth-child(odd) .timeline-badge { right: -11px; }
.timeline-item:nth-child(even) .timeline-badge { left: -11px; }

.timeline-card {
    background: var(--color-card-bg);
    padding: 25px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(212, 175, 55, 0.3);
}

.timeline-img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: 15px;
}

.timeline-year {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-primary);
    font-size: 1.1rem;
}

.timeline-item-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-primary-dark);
    margin: 5px 0 10px;
}

/* 9. Masonry Gallery & Lightbox */
.gallery-grid {
    column-count: 3;
    column-gap: 20px;
    max-width: 1100px;
    margin: 0 auto;
}

.gallery-card {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(212, 175, 55, 0.3);
    margin-bottom: 20px;
    break-inside: avoid;
    -webkit-column-break-inside: avoid;
    transform: translateZ(0);
    transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1), box-shadow 0.4s ease, border-color 0.4s ease;
}

.gallery-card.tall { aspect-ratio: 3/4; }
.gallery-card.wide { aspect-ratio: 16/9; }
.gallery-card.square { aspect-ratio: 1/1; }

.gallery-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.gallery-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 35px rgba(212, 175, 55, 0.25), 0 5px 15px rgba(0,0,0,0.1);
    border-color: var(--color-gold);
}

.gallery-card:hover img {
    transform: scale(1.06);
}

.gallery-hover-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(88, 0, 0, 0.2) 0%, rgba(40, 0, 0, 0.75) 100%);
    opacity: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    padding: 20px;
    color: #fff;
    transition: opacity 0.35s ease;
}

.gallery-hover-overlay i {
    font-size: 1.8rem;
    color: var(--color-gold-light);
    margin-bottom: 8px;
    transform: translateY(10px);
    transition: transform 0.35s ease;
}

.gallery-hover-overlay span {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    transform: translateY(10px);
    transition: transform 0.35s ease;
    text-align: center;
}

.gallery-card:hover .gallery-hover-overlay {
    opacity: 1;
}

.gallery-card:hover .gallery-hover-overlay i,
.gallery-card:hover .gallery-hover-overlay span {
    transform: translateY(0);
}

/* Lightbox Modal (Nền mờ đằng sau, không có màu đỏ) */
.lightbox-modal {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.78);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
}

.lightbox-modal.active {
    display: flex;
}

.lightbox-content-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    max-width: 85vw;
    max-height: 85vh;
    touch-action: none;
}

.lightbox-img {
    max-width: 100%;
    max-height: 75vh;
    border-radius: var(--radius-sm);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(212, 175, 55, 0.4);
    object-fit: contain;
    transition: opacity 0.3s ease;
    cursor: zoom-in;
    user-select: none;
    -webkit-user-select: none;
    -webkit-user-drag: none;
    touch-action: none;
}

.lightbox-caption {
    margin-top: 15px;
    color: var(--color-gold-light);
    font-family: var(--font-heading);
    font-size: 1.1rem;
    text-align: center;
    background: rgba(0, 0, 0, 0.4);
    padding: 6px 20px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(212, 175, 55, 0.3);
}

.lightbox-close-btn {
    position: absolute;
    top: 20px;
    right: 25px;
    color: #fff;
    font-size: 2.5rem;
    cursor: pointer;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    z-index: 10;
}

.lightbox-close-btn:hover {
    color: var(--color-gold);
    border-color: var(--color-gold);
    transform: scale(1.1);
}

/* Nút chuyển ảnh trái / phải trong Lightbox */
.lightbox-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(212, 175, 55, 0.5);
    color: #fff;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    font-size: 1.3rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    z-index: 10;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.lightbox-nav-btn.prev-btn {
    left: 25px;
}

.lightbox-nav-btn.next-btn {
    right: 25px;
}

.lightbox-nav-btn:hover {
    background: var(--color-gold);
    color: var(--color-primary-dark);
    transform: scale(1.15);
}

/* 10. QR Mừng Cưới (Gift Section) */
.gift-grid {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    max-width: 950px;
    margin: 0 auto;
}

.gift-card {
    background: var(--color-card-bg);
    border-radius: var(--radius-md);
    padding: 35px 25px;
    text-align: center;
    flex: 1 1 320px;
    box-shadow: var(--shadow-soft);
    border: 2px solid var(--color-gold);
}

.gift-qr-img {
    width: 220px;
    height: 220px;
    object-fit: contain;
    margin: 15px auto;
    border-radius: var(--radius-sm);
    border: 1px solid #eee;
}

.bank-info-box {
    background: var(--color-bg-warm);
    padding: 15px;
    border-radius: var(--radius-sm);
    margin-top: 15px;
    text-align: left;
    font-size: 0.95rem;
}

.btn-copy {
    background: var(--color-primary);
    color: #fff;
    border: none;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    cursor: pointer;
    margin-left: 8px;
    transition: var(--transition-fast);
}

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

/* 11. Floating Music Player & Back To Top */
.floating-controls {
    position: fixed;
    bottom: 25px;
    right: 25px;
    z-index: var(--z-floating);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.floating-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #fff;
    border: 2px solid var(--color-gold);
    box-shadow: var(--shadow-gold);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.floating-btn:hover {
    transform: scale(1.1);
}

.music-btn.playing {
    animation: spinDisc 4s linear infinite;
}

.back-to-top {
    opacity: 0;
    visibility: hidden;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

/* 12. Footer */
.footer {
    background: var(--color-primary-dark);
    color: var(--color-text-light);
    text-align: center;
    padding: 60px 20px;
}

.footer-brand {
    font-family: var(--font-script);
    font-size: 3.2rem;
    color: var(--color-gold);
    margin-bottom: 10px;
}

/* 13. Toast Notification */
.toast-container {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(160px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    background: rgba(88, 0, 0, 0.95);
    color: #fff;
    padding: 12px 25px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-gold);
    font-size: 0.95rem;
    z-index: var(--z-modal);
    transition: transform 0.4s ease, opacity 0.4s ease, visibility 0.4s ease;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.toast-container.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}