/* ========================================
   THIẾP CƯỚI ONLINE - STYLE.CSS
   Mobile-first, Responsive, Sang trọng
   ======================================== */

/* ---- CSS Variables (Custom Properties) ---- */
:root {
    /* Màu sắc chủ đạo - Pastel kem/beige/hồng */
    --color-cream: #FFF8F0;           /* Kem nhạt - background chính */
    --color-cream-dark: #F5E6D3;      /* Kem đậm hơn */
    --color-beige: #E8D5C4;           /* Beige */
    --color-blush: #FADADD;           /* Hồng pastel nhạt */
    --color-blush-dark: #F5C6CB;      /* Hồng pastel đậm */
    --color-rose: #E8B4B8;            /* Hồng nhạt */
    --color-rose-dark: #D49A9E;       /* Hồng đậm */
    --color-gold: #D4A843;            /* Vàng kim nhạt */
    --color-gold-dark: #C49638;       /* Vàng kim đậm */

    /* Màu text */
    --color-text-dark: #2D2D2D;       /* Đen nhạt */
    --color-text-medium: #4A4A4A;     /* Xám đậm */
    --color-text-light: #6B6B6B;      /* Xám trung bình */
    --color-text-lighter: #999;       /* Xám nhạt */
    --color-white: #FFFFFF;           /* Trắng */
    --color-cream-text: #FDF6F0;      /* Kem cho text trên bg tối */

    /* Font */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;   /* 4px */
    --space-sm: 0.5rem;    /* 8px */
    --space-md: 1rem;      /* 16px */
    --space-lg: 1.5rem;    /* 24px */
    --space-xl: 2rem;      /* 32px */
    --space-2xl: 3rem;     /* 48px */
    --space-3xl: 4rem;     /* 64px */

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;

    /* Container */
    --container-max: 1200px;
    --container-padding: 1rem;

    /* Z-index */
    --z-loading: 9999;
    --z-music: 1000;
    --z-lightbox: 2000;
    --z-hero: 100;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-dark);
    background-color: var(--color-cream);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 500;
    line-height: 1.3;
    color: var(--color-text-dark);
}

p {
    margin-bottom: var(--space-md);
}

a {
    color: var(--color-rose-dark);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-gold-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container utility */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Section base */
.section {
    padding: var(--space-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-decorative {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.decorative-line {
    flex: 1;
    max-width: 80px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-rose), transparent);
}

.section-icon {
    font-size: 1.5rem;
    color: var(--color-rose);
}

.section-title {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--color-text-light);
    font-weight: 300;
    font-style: italic;
}

/* ========================================
   LOADING SCREEN
   ======================================== */
.loading-screen {
    position: fixed;
    inset: 0;
    background: var(--color-cream);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

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

.loading-content {
    text-align: center;
}

.loading-ring {
    width: 60px;
    height: 60px;
    border: 3px solid var(--color-beige);
    border-top-color: var(--color-rose);
    border-radius: 50%;
    margin: 0 auto var(--space-md);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 1rem;
    color: var(--color-text-light);
    font-style: italic;
}

/* ========================================
   MUSIC TOGGLE
   ======================================== */
.music-toggle {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-music);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.music-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.music-toggle.playing .music-icon {
    animation: pulse 1.5s ease-in-out infinite;
}

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

.music-icon {
    font-size: 1.25rem;
    color: var(--color-rose-dark);
    transition: transform var(--transition-fast);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-cream) 0%, var(--color-blush) 50%, var(--color-cream) 100%);
    z-index: -1;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23E8B4B8' fill-opacity='0.1'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 36v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 6V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.floating-hearts {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.floating-hearts .heart {
    position: absolute;
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--color-rose);
    opacity: 0.3;
    animation: floatHeart 8s ease-in-out infinite;
}

.floating-hearts .heart:nth-child(1) { top: 10%; left: 5%; animation-delay: 0s; }
.floating-hearts .heart:nth-child(2) { top: 20%; right: 10%; animation-delay: 1.5s; }
.floating-hearts .heart:nth-child(3) { top: 40%; left: 8%; animation-delay: 3s; }
.floating-hearts .heart:nth-child(4) { bottom: 30%; right: 5%; animation-delay: 4.5s; }
.floating-hearts .heart:nth-child(5) { bottom: 15%; left: 12%; animation-delay: 6s; }
.floating-hearts .heart:nth-child(6) { top: 60%; right: 15%; animation-delay: 7.5s; }

@keyframes floatHeart {
    0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.3; }
    25% { transform: translateY(-20px) rotate(10deg); opacity: 0.5; }
    50% { transform: translateY(-10px) rotate(-5deg); opacity: 0.4; }
    75% { transform: translateY(-30px) rotate(5deg); opacity: 0.5; }
}

.hero-content {
    width: 100%;
    padding: var(--space-xl) var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl) var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow-xl);
    max-width: 400px;
    width: 100%;
    position: relative;
    border: 1px solid rgba(232, 180, 184, 0.3);
}

.hero-couple-image {
    display: block;
    width: 100%;
    height: 210px;
    object-fit: cover;
    object-position: center 20%;
    border-radius: var(--radius-md);
    margin: 0 auto var(--space-lg);
}

.hero-decorative-top,
.hero-decorative-bottom {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.hero-decorative-bottom {
    margin-top: var(--space-lg);
    margin-bottom: 0;
}

.hero-title {
    font-size: clamp(1.75rem, 6vw, 2.5rem);
    font-weight: 500;
    letter-spacing: 0.02em;
    margin-bottom: var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.groom-name,
.bride-name {
    display: block;
    color: var(--color-text-dark);
}

.and-symbol {
    font-size: clamp(1.5rem, 4vw, 2rem);
    color: var(--color-rose);
    font-style: italic;
    font-weight: 400;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--color-text-light);
    font-weight: 300;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-lg);
}

.hero-date {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    color: var(--color-text-medium);
    background: var(--color-blush);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
}

.date-icon {
    font-size: 1.125rem;
}

.btn-open-invitation {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-2xl);
    background: linear-gradient(135deg, var(--color-rose) 0%, var(--color-rose-dark) 100%);
    color: var(--color-white);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal);
    margin-bottom: var(--space-md);
}

.btn-open-invitation:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--color-rose-dark) 0%, var(--color-gold) 100%);
}

.btn-open-invitation:active {
    transform: translateY(0);
}

.btn-icon {
    transition: transform var(--transition-normal);
}

.btn-open-invitation:hover .btn-icon {
    transform: translateX(4px);
}

.hero-hint {
    font-size: 0.8rem;
    color: var(--color-text-lighter);
    font-style: italic;
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-text-light);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    color: var(--color-rose);
}

.flower-shower {
    position: fixed;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: var(--z-hero);
}

.falling-flower {
    position: absolute;
    top: -2rem;
    line-height: 1;
    opacity: 0;
    animation: flowerFall 5s ease-in forwards;
}

@keyframes flowerFall {
    10% { opacity: 0.9; }
    85% { opacity: 0.9; }
    100% {
        opacity: 0;
        transform: translate3d(40px, 110vh, 0) rotate(360deg);
    }
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.main-content {
    animation: fadeInUp var(--transition-slow) ease-out;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ========================================
   OUR STORY SECTION
   ======================================== */
.our-story {
    background: var(--color-white);
}

.story-content {
    max-width: 800px;
    margin: 0 auto;
}

.story-text {
    text-align: center;
    margin-bottom: var(--space-2xl);
    padding: 0 var(--space-md);
}

.story-text p {
    font-size: 1.05rem;
    color: var(--color-text-medium);
    line-height: 1.8;
}

.story-signature {
    font-family: var(--font-heading);
    font-size: 1.125rem;
    color: var(--color-rose-dark);
    font-style: italic;
    margin-top: var(--space-lg) !important;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: var(--space-lg);
}

.timeline-line {
    position: absolute;
    left: 18px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-blush) 0%, var(--color-rose) 50%, var(--color-blush) 100%);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-2xl);
    opacity: 0;
    transform: translateX(-30px);
    animation: timelineReveal 0.6s ease-out forwards;
}

.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }
.timeline-item:nth-child(4) { animation-delay: 0.4s; }
.timeline-item:nth-child(5) { animation-delay: 0.5s; }

@keyframes timelineReveal {
    to { opacity: 1; transform: translateX(0); }
}

.timeline-marker {
    position: absolute;
    left: -var(--space-lg);
    top: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.marker-number {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--color-rose-dark);
    font-family: var(--font-body);
    letter-spacing: 0.05em;
}

.marker-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-white);
    border: 3px solid var(--color-rose);
    box-shadow: 0 0 0 4px var(--color-cream);
    z-index: 1;
}

.timeline-content {
    background: var(--color-cream);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-beige);
}

.timeline-date {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-gold-dark);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    background: var(--color-white);
    border-radius: var(--radius-full);
}

.timeline-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text-dark);
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin: 0;
}

/* ========================================
   COUPLE SECTION
   ======================================== */
.couple {
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-cream) 100%);
}

.couple-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: start;
    max-width: 900px;
    margin: 0 auto;
}

.person-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(232, 180, 184, 0.2);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.person-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.person-image-wrapper {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
}

.person-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.person-card:hover .person-image {
    transform: scale(1.05);
}

.person-image-placeholder {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-blush) 0%, var(--color-cream) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.person-image-wrapper.has-image .person-image-placeholder {
    display: none;
}

.placeholder-icon {
    font-size: 4rem;
    opacity: 0.5;
}

.person-info {
    padding: var(--space-xl);
    text-align: center;
}

.person-name {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.person-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-rose-dark);
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.person-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: var(--color-cream);
    border-radius: var(--radius-md);
}

.detail-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-size: 0.9rem;
    color: var(--color-text-medium);
}

.detail-icon {
    font-size: 1rem;
}

.person-quote {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-style: italic;
    color: var(--color-text-light);
    border-top: 1px solid var(--color-beige);
    padding-top: var(--space-md);
}

/* Couple heart divider */
.couple-heart {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
}

.heart-symbol {
    font-size: 2.5rem;
    color: var(--color-rose);
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

.heart-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-text-light);
    font-weight: 600;
}

/* ========================================
   GALLERY SECTION
   ======================================== */
.gallery {
    background: var(--color-white);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    max-width: 900px;
    margin: 0 auto;
}

.gallery-item {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.gallery-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.gallery-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-item:hover .gallery-image {
    transform: scale(1.08);
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-md);
    background: linear-gradient(transparent, rgba(45,45,45,0.8));
    color: var(--color-white);
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

.gallery-item:hover .gallery-caption {
    transform: translateY(0);
}

/* ========================================
   WEDDING INFO SECTION
   ======================================== */
.wedding-info {
    background: linear-gradient(180deg, var(--color-cream) 0%, var(--color-white) 100%);
}

.wedding-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    max-width: 1000px;
    margin: 0 auto var(--space-2xl);
}

.wedding-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(232, 180, 184, 0.2);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.wedding-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
    color: var(--color-text-dark);
}

.card-detail {
    margin-bottom: var(--space-md);
}

.detail-time {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-dark);
    margin-bottom: var(--space-xs);
}

.detail-location {
    display: block;
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-style: normal;
}

.card-note {
    font-size: 0.8rem;
    color: var(--color-text-lighter);
    font-style: italic;
    margin: 0;
}

/* Countdown */
.countdown-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    margin: var(--space-md) 0;
    flex-wrap: wrap;
}

.countdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 50px;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-cream);
    border-radius: var(--radius-md);
}

.countdown-value {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-rose-dark);
    line-height: 1.2;
}

.countdown-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-top: var(--space-xs);
}

.countdown-separator {
    font-size: 1.5rem;
    color: var(--color-rose);
    font-weight: 300;
    line-height: 1;
}

.countdown-text {
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-style: italic;
    margin: 0;
}

/* Map section */
.map-section {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.map-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
}

.map-placeholder {
    background: var(--color-cream);
    border: 2px dashed var(--color-beige);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl) var(--space-lg);
    margin-bottom: var(--space-lg);
    transition: border-color var(--transition-fast);
}

.map-placeholder:hover {
    border-color: var(--color-rose);
}

.map-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
}

.map-icon {
    font-size: 3rem;
    opacity: 0.5;
}

.map-content p {
    color: var(--color-text-light);
    margin: 0;
}

.btn-map {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-xl);
    background: var(--color-rose);
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.btn-map:hover {
    background: var(--color-rose-dark);
    transform: translateY(-2px);
    color: var(--color-white);
}

.map-address {
    text-align: left;
    background: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-beige);
}

.map-address p {
    font-size: 0.9rem;
    color: var(--color-text-medium);
    margin-bottom: var(--space-sm);
}

.map-address p:last-child {
    margin-bottom: 0;
}

/* ========================================
   INVITATION SECTION
   ======================================== */
.invitation {
    background: var(--color-white);
}

.invitation-content {
    max-width: 700px;
    margin: 0 auto;
}

.invitation-card {
    background: var(--color-cream);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    border: 1px solid var(--color-beige);
    margin-bottom: var(--space-2xl);
}

.invitation-decorative-top,
.invitation-decorative-bottom {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.invitation-decorative-bottom {
    margin-top: var(--space-lg);
    margin-bottom: 0;
}

.decorative-floral {
    color: var(--color-rose);
    font-size: 1.25rem;
}

.invitation-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-medium);
    text-align: justify;
}

.invitation-text p {
    margin-bottom: var(--space-md);
}

.invitation-text p:last-of-type {
    margin-bottom: var(--space-lg);
}

.invitation-signature {
    text-align: right;
    font-family: var(--font-heading);
    font-style: italic;
}

.invitation-signature p {
    margin-bottom: var(--space-sm);
    color: var(--color-text-light);
}

.names-signature {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-md);
}

.groom-sign,
.bride-sign {
    font-size: 1.25rem;
    color: var(--color-text-dark);
    font-weight: 500;
}

.heart-divider {
    color: var(--color-rose);
    font-size: 1.5rem;
}

/* RSVP Section */
.rsvp-section {
    text-align: center;
    padding: var(--space-xl);
    background: linear-gradient(135deg, var(--color-blush) 0%, var(--color-cream) 100%);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-beige);
}

.rsvp-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.rsvp-text {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-lg);
}

.rsvp-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: center;
}

.btn-rsvp {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-2xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    min-width: 200px;
    justify-content: center;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-rsvp:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-rsvp-yes {
    background: var(--color-rose);
    color: var(--color-white);
}

.btn-rsvp-yes:hover {
    background: var(--color-rose-dark);
}

.btn-rsvp-no {
    background: var(--color-white);
    color: var(--color-text-medium);
    border: 2px solid var(--color-beige);
}

.btn-rsvp-no:hover {
    border-color: var(--color-rose);
    color: var(--color-rose-dark);
}

.rsvp-icon {
    font-size: 1.125rem;
}

.rsvp-note {
    font-size: 0.75rem;
    color: var(--color-text-lighter);
    margin-top: var(--space-md) !important;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--color-text-dark);
    color: var(--color-cream-text);
    padding: var(--space-2xl) 0 var(--space-xl);
}

.footer-content {
    text-align: center;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-couple {
    order: 1;
}

.footer-names {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 400;
    margin-bottom: var(--space-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.footer-heart {
    color: var(--color-rose);
    font-size: 1.5em;
    animation: heartbeat 1.5s ease-in-out infinite;
}

.footer-date {
    font-size: 0.9rem;
    color: var(--color-text-lighter);
    letter-spacing: 0.1em;
}

.footer-contact,
.footer-account {
    text-align: left;
}

.footer-contact-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gold);
    margin-bottom: var(--space-md);
    font-weight: 600;
}

.contact-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.contact-icon {
    font-size: 1.125rem;
}

.contact-link {
    color: var(--color-cream-text);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.contact-link:hover {
    color: var(--color-gold);
}

.account-info {
    background: rgba(255,255,255,0.05);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255,255,255,0.1);
}

.account-name,
.account-number,
.account-bank {
    font-size: 0.9rem;
    color: var(--color-cream-text);
    margin-bottom: var(--space-sm);
}

.account-number {
    font-family: monospace;
    letter-spacing: 0.1em;
    font-weight: 500;
}

.btn-copy-account {
    margin-top: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-gold);
    color: var(--color-text-dark);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.btn-copy-account:hover {
    background: var(--color-gold-dark);
    transform: translateY(-2px);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-decorative {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.footer-decorative .decorative-line {
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    max-width: 100px;
}

.footer-decorative span:not(.decorative-line) {
    color: var(--color-gold);
}

.copyright {
    font-size: 0.8rem;
    color: var(--color-text-lighter);
    margin-bottom: var(--space-xs);
}

.credit {
    font-size: 0.75rem;
    color: var(--color-text-lighter);
    font-style: italic;
}

/* ========================================
   LIGHTBOX
   ======================================== */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-lightbox);
    flex-direction: column;
    padding: var(--space-lg);
}

.lightbox[hidden] {
    display: none;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    color: var(--color-white);
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255,255,255,0.2);
    transform: scale(1.1);
}

.lightbox-close {
    top: var(--space-lg);
    right: var(--space-lg);
}

.lightbox-prev {
    left: var(--space-lg);
}

.lightbox-next {
    right: var(--space-lg);
}

.lightbox-image {
    max-width: 90vw;
    max-height: 80vh;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
}

.lightbox-caption {
    color: var(--color-white);
    font-size: 1rem;
    margin-top: var(--space-md);
    text-align: center;
    max-width: 90vw;
}

/* ========================================
   RESPONSIVE - MOBILE FIRST
   Breakpoints:
   - 375px (iPhone SE/12 mini)
   - 390px (iPhone 12/13/14)
   - 412px (Pixel/large phones)
   - 768px (tablet)
   - 1024px (desktop)
   - 1200px (large desktop)
   ======================================== */

/* ---- 375px - 389px (Small phones) ---- */
@media (min-width: 375px) {
    :root {
        --container-padding: 1.25rem;
    }

    .hero-card {
        padding: var(--space-2xl) var(--space-xl);
        max-width: 100%;
    }

    .person-info {
        padding: var(--space-xl) var(--space-lg);
    }

    /* Gallery: 1 cột trên màn hình rất nhỏ để ảnh to hơn */
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    /* Countdown: giảm kích thước trên màn hình nhỏ */
    .countdown-item {
        min-width: 45px;
        padding: var(--space-sm) var(--space-sm);
    }

    .countdown-value {
        font-size: 1.5rem;
    }

    .countdown-separator {
        font-size: 1.25rem;
    }

    .countdown-label {
        font-size: 0.6rem;
    }

    /* RSVP buttons: giảm min-width */
    .btn-rsvp {
        min-width: 160px;
        padding: var(--space-sm) var(--space-lg);
    }

    /* Music toggle: điều chỉnh vị trí */
    .music-toggle {
        top: var(--space-md);
        right: var(--space-md);
        width: 44px;
        height: 44px;
    }

    /* Timeline: điều chỉnh marker position */
    .timeline {
        padding-left: var(--space-md);
    }

    .timeline-line {
        left: 14px;
    }

    .timeline-marker {
        left: -var(--space-md);
    }

    .marker-dot {
        width: 12px;
        height: 12px;
    }

    .marker-number {
        font-size: 0.6rem;
    }
}

/* ---- 390px - 411px (Standard phones) ---- */
@media (min-width: 390px) {
    .hero-card {
        max-width: 420px;
    }

    /* Gallery: 2 cột */
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }

    .countdown-value {
        font-size: 1.75rem;
    }

    .countdown-item {
        min-width: 50px;
        padding: var(--space-sm) var(--space-md);
    }

    .countdown-separator {
        font-size: 1.5rem;
    }

    .countdown-label {
        font-size: 0.65rem;
    }

    .btn-rsvp {
        min-width: 180px;
    }
}

/* ---- 412px - 767px (Large phones) ---- */
@media (min-width: 412px) {
    .hero-card {
        max-width: 450px;
        padding: var(--space-3xl) var(--space-2xl);
    }

    .story-text {
        padding: 0 var(--space-lg);
    }

    .gallery-grid {
        gap: var(--space-lg);
    }

    .wedding-card {
        padding: var(--space-xl) var(--space-lg);
    }

    .countdown-item {
        min-width: 60px;
        padding: var(--space-md) var(--space-lg);
    }

    .countdown-value {
        font-size: 2.25rem;
    }

    .countdown-separator {
        font-size: 1.5rem;
    }

    .invitation-card {
        padding: var(--space-2xl) var(--space-xl);
    }

    /* Timeline: nhiều không gian hơn */
    .timeline {
        padding-left: var(--space-lg);
    }

    .timeline-line {
        left: 18px;
    }

    .timeline-marker {
        left: -var(--space-lg);
    }

    .marker-dot {
        width: 14px;
        height: 14px;
    }

    .marker-number {
        font-size: 0.65rem;
    }
}

/* ---- 768px - 1023px (Tablet) ---- */
@media (min-width: 768px) {
    :root {
        --container-padding: 2rem;
    }

    .section {
        padding: var(--space-3xl) 0;
    }

    /* Hero */
    .hero-card {
        max-width: 500px;
        padding: var(--space-3xl) var(--space-2xl);
    }

    .hero-title {
        flex-direction: row;
        align-items: center;
        justify-content: center;
        gap: var(--space-md);
    }

    .and-symbol {
        margin: 0 var(--space-sm);
    }

    /* Couple - side by side on tablet */
    .couple-grid {
        grid-template-columns: 1fr auto 1fr;
        gap: var(--space-lg);
        align-items: center;
    }

    .person-card {
        max-width: 320px;
        margin: 0 auto;
    }

    .couple-heart {
        flex-shrink: 0;
        padding: var(--space-lg);
    }

    .heart-symbol {
        font-size: 3rem;
    }

    /* Gallery - 3 columns */
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-lg);
        max-width: 100%;
    }

    /* Wedding info - 3 columns */
    .wedding-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-lg);
    }

    .wedding-card {
        padding: var(--space-xl);
    }

    .wedding-card.countdown-card {
        grid-column: span 3;
        max-width: 500px;
        margin: 0 auto;
    }

    .countdown-item {
        min-width: 70px;
        padding: var(--space-md) var(--space-lg);
    }

    .countdown-value {
        font-size: 2.5rem;
    }

    .countdown-separator {
        font-size: 2rem;
    }

    .countdown-label {
        font-size: 0.7rem;
    }

    .map-section {
        margin-top: var(--space-xl);
    }

    .map-address {
        display: flex;
        justify-content: space-around;
        flex-wrap: wrap;
        gap: var(--space-md);
        text-align: center;
    }

    .map-address p {
        margin: 0;
    }

    /* Invitation */
    .invitation-card {
        padding: var(--space-3xl) var(--space-2xl);
    }

    .rsvp-buttons {
        flex-direction: row;
        justify-content: center;
    }

    .btn-rsvp {
        min-width: 180px;
    }

    /* Footer */
    .footer-main {
        grid-template-columns: 1fr 1fr 1fr;
        text-align: left;
        gap: var(--space-xl);
    }

    .footer-couple {
        order: 1;
        text-align: center;
    }

    .footer-names {
        justify-content: center;
    }

    .footer-contact,
    .footer-account {
        order: 2;
    }

    .footer-account {
        order: 3;
    }

    /* Timeline trên tablet */
    .timeline {
        padding-left: calc(var(--space-lg) + 20px);
    }

    .timeline-line {
        left: 28px;
    }

    .timeline-marker {
        left: calc(-1 * var(--space-lg) - 20px);
    }
}

/* ---- 1024px - 1199px (Desktop) ---- */
@media (min-width: 1024px) {
    :root {
        --container-padding: 3rem;
    }

    .hero {
        min-height: 100vh;
    }

    .hero-card {
        max-width: 550px;
        padding: 4rem 3rem;
    }

    .hero-title {
        font-size: 3rem;
    }

    .and-symbol {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .person-card {
        max-width: 350px;
    }

    .person-info {
        padding: var(--space-xl) var(--space-xl);
    }

    .person-name {
        font-size: 1.75rem;
    }

    .wedding-card.countdown-card {
        max-width: 600px;
    }

    .countdown-item {
        min-width: 80px;
        padding: var(--space-lg) var(--space-xl);
    }

    .countdown-value {
        font-size: 3rem;
    }

    .countdown-separator {
        font-size: 2rem;
    }

    .countdown-label {
        font-size: 0.75rem;
    }

    /* Gallery - 3 columns with larger max-width */
    .gallery-grid {
        max-width: 1000px;
    }

    /* Wedding grid */
    .wedding-grid {
        max-width: 1000px;
    }
}

/* ---- 1200px+ (Large desktop) ---- */
@media (min-width: 1200px) {
    .hero-card {
        max-width: 600px;
    }

    .couple-grid {
        gap: var(--space-xl);
    }

    .person-card {
        max-width: 380px;
    }

    .gallery-grid {
        max-width: 1100px;
    }

    .wedding-grid {
        max-width: 1100px;
    }

    .countdown-item {
        min-width: 90px;
        padding: var(--space-lg) var(--space-xl);
    }

    .countdown-value {
        font-size: 3.5rem;
    }
}

/* ========================================
   FIXES FOR SPECIFIC MOBILE ISSUES
   ======================================== */

/* Fix hero title on very small screens - ensure names stack properly */
@media (max-width: 374px) {
    .hero-title {
        font-size: 1.5rem;
        gap: 0;
    }

    .and-symbol {
        font-size: 1.25rem;
    }

    .hero-subtitle {
        font-size: 0.85rem;
    }

    .hero-date {
        font-size: 0.85rem;
        padding: var(--space-xs) var(--space-md);
    }

    .btn-open-invitation {
        padding: var(--space-sm) var(--space-lg);
        font-size: 0.85rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .person-name {
        font-size: 1.25rem;
    }

    .card-title {
        font-size: 1.1rem;
    }

    .detail-time {
        font-size: 0.85rem;
    }

    .detail-location {
        font-size: 0.8rem;
    }

    .map-address p {
        font-size: 0.8rem;
    }

    .invitation-text {
        font-size: 0.9rem;
    }

    .rsvp-title {
        font-size: 1.1rem;
    }

    .footer-names {
        font-size: 1.25rem;
        gap: var(--space-sm);
    }

    .contact-link {
        font-size: 0.8rem;
    }

    .account-name,
    .account-number,
    .account-bank {
        font-size: 0.8rem;
    }
}

/* Ensure hero card doesn't overflow on very small screens */
@media (max-width: 320px) {
    .hero-card {
        padding: var(--space-lg) var(--space-md);
        margin: var(--space-md);
        border-radius: var(--radius-lg);
    }

    .hero-content {
        padding: var(--space-md);
    }

    .container {
        padding: 0 var(--space-sm);
    }

    .section {
        padding: var(--space-xl) 0;
    }

    .person-info {
        padding: var(--space-lg) var(--space-md);
    }

    .wedding-card {
        padding: var(--space-lg) var(--space-md);
    }

    .invitation-card {
        padding: var(--space-lg) var(--space-md);
    }

    .rsvp-section {
        padding: var(--space-lg) var(--space-md);
    }

    .gallery-grid {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

    .countdown-timer {
        gap: 2px;
    }

    .countdown-item {
        min-width: 40px;
        padding: var(--space-xs) var(--space-xs);
    }

    .countdown-value {
        font-size: 1.25rem;
    }

    .countdown-separator {
        font-size: 1rem;
    }
}

/* Fix for iPhone notch / safe area */
@supports (padding: max(0px)) {
    .hero-content {
        padding-left: max(var(--container-padding), env(safe-area-inset-left));
        padding-right: max(var(--container-padding), env(safe-area-inset-right));
    }

    .footer {
        padding-bottom: max(var(--space-xl), env(safe-area-inset-bottom));
    }

    .music-toggle {
        top: max(var(--space-lg), env(safe-area-inset-top));
        right: max(var(--space-lg), env(safe-area-inset-right));
    }

    .lightbox-close {
        top: max(var(--space-lg), env(safe-area-inset-top));
        right: max(var(--space-lg), env(safe-area-inset-right));
    }

    .lightbox-prev {
        left: max(var(--space-lg), env(safe-area-inset-left));
    }

    .lightbox-next {
        right: max(var(--space-lg), env(safe-area-inset-right));
    }
}

/* Prevent horizontal scroll on mobile */
html, body {
    max-width: 100vw;
    overflow-x: hidden;
}

/* Fix for images without explicit dimensions causing layout shift */
img {
    max-width: 100%;
    height: auto;
    display: block;
    /* Prevent layout shift */
    contain: layout;
}

/* Fix touch targets for mobile */
button,
a,
input,
select,
textarea {
    min-height: 44px;
    min-width: 44px;
}

/* Exception for small decorative elements */
.heart,
.marker-dot,
.decorative-line,
.scroll-arrow,
.date-icon,
.detail-icon,
.contact-icon,
.placeholder-icon,
.map-icon,
.rsvp-icon,
.section-icon,
.card-icon,
.heart-symbol,
.footer-heart,
.heart-divider {
    min-height: auto;
    min-width: auto;
}

/* Ensure form elements are usable on mobile */
input,
select,
textarea {
    font-size: 16px; /* Prevents zoom on iOS */
}

/* ========================================
   ACCESSIBILITY
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-rose: #C00;
        --color-rose-dark: #900;
        --color-gold: #B8860B;
        --color-text-dark: #000;
        --color-text-medium: #333;
    }
}

/* Print styles */
@media print {
    .music-toggle,
    .loading-screen,
    .scroll-indicator,
    .btn-open-invitation,
    .rsvp-section,
    .btn-map,
    .btn-copy-account,
    .lightbox {
        display: none !important;
    }

    .hero {
        min-height: auto;
        page-break-after: always;
    }

    .main-content {
        display: block !important;
    }

    body {
        background: white;
    }

    .footer {
        background: white;
        color: black;
    }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */
.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }