:root {
    --primary: #414D3E;      
    --primary-dark: #2C3529; 
    --primary-light: #5E6B5C; 
    --accent: #C5A862;       
    --accent-light: #E8D8B8;
    --bg-cream: #FAF7F0;     
    --bg-glass: rgba(250, 247, 240, 0.85);
    --text-dark: #2C3529;
    --text-light: #FAF7F0;
    --font-serif: 'Bodoni Moda', serif;
    --font-sans: 'Montserrat', sans-serif;
    --font-script: 'Alex Brush', cursive;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    --border-gold: 1px solid rgba(197, 168, 98, 0.3);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

body, html {
    height: 100%;
    background-color: #1A2119; 
    font-family: var(--font-sans);
    color: var(--text-dark);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-frame {
    width: 100%;
    height: 100%;
    max-width: 480px;
    background-color: var(--bg-cream);
    position: relative;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.music-control {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 900;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--bg-glass);
    border: var(--border-gold);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

.music-control.visible {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}

.music-control i {
    color: var(--accent);
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.music-control.playing i {
    animation: spin 3s linear infinite;
}

.eq-waves {
    display: flex;
    align-items: flex-end;
    gap: 2px;
    height: 15px;
    margin-left: 2px;
    display: none;
}

.music-control.playing .eq-waves {
    display: flex;
}
.music-control.playing i {
    display: none;
}

.eq-bar {
    width: 3px;
    background-color: var(--accent);
    height: 100%;
    transform-origin: bottom;
    animation: bounce-bar 1.2s ease-in-out infinite alternate;
}
.eq-bar:nth-child(2) { animation-delay: 0.2s; }
.eq-bar:nth-child(3) { animation-delay: 0.4s; }
.eq-bar:nth-child(4) { animation-delay: 0.1s; }

@keyframes bounce-bar {
    0% { transform: scaleY(0.2); }
    100% { transform: scaleY(1); }
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

.envelope-screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--primary);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: opacity 1s ease, transform 1s ease;
    perspective: 1000px;
    padding: 20px;
}

.envelope-screen.opened {
    opacity: 0;
    transform: translateY(-100%);
    pointer-events: none;
}

.envelope-wrapper {
    position: relative;
    width: 320px;
    height: 220px;
    background-color: #272f26; 
    border-radius: 8px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.4);
    cursor: pointer;
    transition: transform 0.5s ease;
}

.envelope-wrapper:hover {
    transform: scale(1.02) translateY(-5px);
}

.flap {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-top: 110px solid #505e4d; 
    border-left: 160px solid transparent;
    border-right: 160px solid transparent;
    transform-origin: top;
    transition: transform 0.6s ease 0.2s, z-index 0.1s ease 0.4s;
    z-index: 4;
    filter: drop-shadow(0 2px 5px rgba(0,0,0,0.1));
}

.envelope-wrapper.open .flap {
    transform: rotateX(180deg);
    z-index: 1; 
}

.pocket {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    z-index: 3;
}

.pocket::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 0;
    border-bottom: 110px solid #333d31;
    border-right: 160px solid #333d31;
    border-top: 110px solid transparent;
    border-left: 160px solid transparent;
    border-radius: 0 0 8px 8px;
}

.pocket::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 0;
    height: 0;
    border-bottom: 110px solid #2e372c;
    border-left: 160px solid #2e372c;
    border-top: 110px solid transparent;
    border-right: 160px solid transparent;
    border-radius: 0 0 8px 8px;
}

.letter {
    position: absolute;
    bottom: 10px;
    left: 15px;
    width: 290px;
    height: 190px;
    background-color: var(--bg-cream);
    border-radius: 6px;
    z-index: 2;
    transition: transform 0.8s ease 0.6s;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    border: var(--border-gold);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 15px;
    text-align: center;
}

.letter h4 {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: var(--primary);
    letter-spacing: 2px;
    margin-bottom: 5px;
    text-transform: uppercase;
}

.letter p {
    font-family: var(--font-script);
    font-size: 2rem;
    color: var(--accent);
    line-height: 1.2;
}

.envelope-wrapper.open .letter {
    transform: translateY(-130px);
}

.wax-seal {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -30%);
    width: 70px;
    height: 70px;
    background: radial-gradient(circle, #e9d8b8 0%, #c5a862 100%);
    border-radius: 50%;
    z-index: 5;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3), inset 0 2px 4px rgba(255,255,255,0.4);
    border: 2px solid #dfcfab;
    transition: all 0.4s ease;
}

.wax-seal::after {
    content: '\f55b'; 
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: #4b3e1f;
    font-size: 1.6rem;
    transition: transform 0.3s ease;
}

.envelope-wrapper.open .wax-seal {
    transform: translate(-50%, -30%) scale(0);
    opacity: 0;
    pointer-events: none;
}

.open-btn {
    margin-top: 50px;
    padding: 14px 30px;
    background: linear-gradient(135deg, var(--accent) 0%, #a48645 100%);
    color: var(--text-light);
    border: none;
    border-radius: 50px;
    font-family: var(--font-sans);
    font-weight: 600;
    letter-spacing: 2px;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    transition: all 0.3s ease;
    z-index: 10;
    font-size: 0.85rem;
    border: 1px solid rgba(255,255,255,0.15);
    text-transform: uppercase;
}

.open-btn:active {
    transform: scale(0.95);
}

.main-content {
    flex: 1;
    width: 100%;
    overflow-y: scroll;
    scroll-behavior: smooth;
    background-color: var(--bg-cream);
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: y mandatory;
}

section {
    height: 100%;
    min-height: 100vh;
    width: 100%;
    position: relative;
    padding: 40px 25px 65px 25px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-bottom: var(--border-gold);
    overflow: hidden;
    scroll-snap-align: start;
}

.fade-in-section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.section-cover {
    padding: 0;
    justify-content: flex-end;
    background-color: var(--bg-cream);
}

.cover-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: 1;
}

.cover-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(26, 33, 25, 0.4) 0%, rgba(250, 247, 240, 0) 60%, rgba(250, 247, 240, 1) 95%);
    z-index: 2;
}

.cover-content {
    position: relative;
    z-index: 3;
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding: 60px 20px 95px 20px;
    text-align: center;
    height: 100%;
}

.cover-header {
    margin-top: 10px;
    width: 100%;
}

.cover-subtitle {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    letter-spacing: 3px;
    font-weight: 600;
    color: #FFFFFF;
    margin-bottom: 20px;
    text-transform: uppercase;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
    animation: fadeInDown 1.2s ease-out;
}

.cover-names {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.name {
    font-family: var(--font-script);
    font-size: 4.8rem;
    color: #FFFFFF;
    line-height: 1;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.3);
    animation: fadeInScale 1.4s ease-out;
    font-weight: bold;
}

.ampersand {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 2.2rem;
    color: #FFFFFF;
    line-height: 1;
    margin: 5px 0;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.5), 0 1px 3px rgba(0, 0, 0, 0.3);
    animation: fadeIn 1.6s ease-out;
    font-weight: bold;
}

.cover-date-place {
    text-align: center;
}

.cover-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    width: 100%;
    animation: fadeInUp 1.5s ease-out;
}

.cover-date-place h3 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    color: var(--primary-dark);
    letter-spacing: 2px;
    font-weight: 700;
    margin-bottom: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--primary-dark);
    font-size: 0.75rem;
    letter-spacing: 2px;
    font-weight: 600;
    animation: bounce 2s infinite;
    text-transform: uppercase;
    margin-top: 0;
    position: relative;
    top: -20px;
}

.scroll-indicator i {
    margin-top: 5px;
    font-size: 0.95rem;
    color: var(--accent);
}

.scroll-indicator-absolute {
    position: absolute;
    bottom: 35px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 0.7rem;
    letter-spacing: 2px;
    font-weight: 600;
    animation: bounce 2s infinite;
    text-transform: uppercase;
    opacity: 0.85;
    z-index: 10;
    color: inherit;
}

.scroll-indicator-absolute i {
    margin-top: 3px;
    font-size: 0.85rem;
    color: var(--accent);
}

.section-details {
    background-color: var(--primary);
    color: var(--bg-cream);
    text-align: center;
}

.details-heart {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 20px;
}

.details-names {
    font-family: var(--font-script);
    font-size: 3.5rem;
    color: #FFFFFF;
    margin-bottom: 10px;
}

.details-date {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    letter-spacing: 2px;
    font-weight: 400;
    color: var(--bg-cream);
    margin-bottom: 8px;
}

.details-time {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    letter-spacing: 3px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 25px;
    text-transform: uppercase;
}

.details-divider {
    width: 80px;
    height: 1px;
    background-color: rgba(197, 168, 98, 0.4);
    margin: 0 auto 30px auto;
    position: relative;
}
.details-divider::after {
    content: '♦';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--accent);
    font-size: 0.7rem;
    background-color: var(--primary);
    padding: 0 8px;
}

.parents-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    width: 100%;
    max-width: 380px;
    margin: 0 auto 35px auto;
    position: relative;
}

.parents-grid::after {
    content: '';
    position: absolute;
    top: 10%;
    bottom: 10%;
    left: 50%;
    width: 1px;
    background: rgba(197, 168, 98, 0.3);
}

.parent-column h4 {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    letter-spacing: 2px;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 10px;
    font-weight: 600;
}

.parent-column p {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    line-height: 1.6;
    color: #FFFFFF;
    font-weight: 300;
}

.details-rings {
    margin-bottom: 25px;
    filter: drop-shadow(0 2px 5px rgba(0,0,0,0.15));
}

.details-footer {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    letter-spacing: 2.5px;
    line-height: 1.8;
    max-width: 320px;
    margin: 0 auto;
    color: var(--bg-cream);
    opacity: 0.9;
}

.section-message {
    background-color: var(--bg-cream);
    text-align: center;
}

.dancing-couples-img {
    width: 100%;
    max-width: 280px;
    height: auto;
    margin-bottom: 25px;
    mix-blend-mode: multiply;
}

.message-quote {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 25px;
    font-style: italic;
    max-width: 380px;
    font-weight: 600;
}

.section-gallery {
    background-color: #ECE8DD; 
    text-align: center;
    justify-content: flex-start;
    padding-top: 50px;
    padding-bottom: 80px;
}

.gallery-title {
    font-family: var(--font-script);
    font-size: 3.5rem;
    color: var(--primary-dark);
    margin-bottom: 5px;
}

.gallery-subtitle {
    font-family: var(--font-serif);
    font-size: 0.85rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 30px;
}

.gallery-container {
    width: 100%;
    max-width: 380px;
    display: flex;
    flex-direction: column;
    gap: 25px;
    align-items: center;
    padding-bottom: 20px;
}

.polaroid-card {
    background: #FFFFFF;
    padding: 12px 12px 24px 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    border-radius: 2px;
    width: 85%;
    max-width: 290px;
    transform: rotate(-2deg);
    transition: all 0.3s ease;
}

.polaroid-card:nth-child(even) {
    transform: rotate(3deg);
}

.polaroid-card:hover {
    transform: rotate(0deg) scale(1.03);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

.polaroid-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border: 1px solid #EFEFEF;
}

.polaroid-caption {
    font-family: var(--font-script);
    font-size: 1.8rem;
    color: var(--primary-dark);
    margin-top: 12px;
    text-align: center;
}

.section-countdown {
    background-color: var(--primary-light);
    color: var(--bg-cream);
    text-align: center;
}

.countdown-title {
    font-family: var(--font-script);
    font-size: 3.5rem;
    color: #FFFFFF;
    margin-bottom: 5px;
}

.countdown-subtitle {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-style: italic;
    color: var(--bg-cream);
    opacity: 0.9;
    margin-bottom: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.countdown-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
}

.countdown-item {
    background-color: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 12px;
    padding: 20px 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    backdrop-filter: blur(5px);
}

.countdown-val {
    font-family: var(--font-serif);
    font-size: 2.4rem;
    font-weight: 500;
    color: #FFFFFF;
    line-height: 1;
}

.countdown-label {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent-light);
    margin-top: 8px;
    font-weight: 500;
    opacity: 0.9;
}

.section-venue {
    background-color: var(--bg-cream);
    text-align: center;
}

.champagne-toast-img {
    width: 80px;
    height: auto;
    margin-bottom: 15px;
    mix-blend-mode: multiply;
}

.venue-title {
    font-family: var(--font-script);
    font-size: 3.5rem;
    color: var(--primary-dark);
    margin-bottom: 2px;
}

.venue-subtitle {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 25px;
}

.venue-card {
    width: 100%;
    max-width: 380px;
    background: #FFFFFF;
    border: var(--border-gold);
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.venue-card i {
    font-size: 1.6rem;
    color: var(--accent);
    margin-bottom: 10px;
}

.venue-name {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    color: var(--primary-dark);
    margin-bottom: 6px;
    font-weight: 500;
}

.venue-address {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: #666;
    line-height: 1.5;
}

.map-wrapper {
    width: 100%;
    max-width: 380px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: var(--border-gold);
    margin-bottom: 25px;
}

.venue-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    width: 100%;
    max-width: 380px;
}

.btn-venue {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 12px;
    border-radius: 30px;
    font-size: 0.75rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    font-weight: 600;
    transition: all 0.3s ease;
    text-decoration: none;
    cursor: pointer;
}

.btn-calendar {
    background-color: transparent;
    color: var(--primary-dark);
    border: 1px solid var(--accent);
}

.btn-directions {
    background-color: var(--primary);
    color: var(--bg-cream);
    border: 1px solid var(--primary);
    box-shadow: 0 4px 15px rgba(65, 77, 62, 0.2);
}

.btn-venue:active {
    transform: scale(0.97);
}

.section-rsvp {
    background-color: var(--bg-cream);
    text-align: center;
}

.rsvp-title {
    font-family: var(--font-script);
    font-size: 3.5rem;
    color: var(--primary-dark);
    margin-bottom: 2px;
}

.rsvp-subtitle {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-style: italic;
    color: #666;
    margin-bottom: 30px;
}

.rsvp-card {
    width: 100%;
    max-width: 380px;
    background: #FFFFFF;
    border: var(--border-gold);
    border-radius: 16px;
    padding: 25px 20px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid rgba(65, 77, 62, 0.15);
    background-color: #FAF7F0;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-dark);
    outline: none;
    transition: all 0.3s ease;
}

.form-input:focus {
    border-color: var(--accent);
    background-color: #FFFFFF;
    box-shadow: 0 0 0 3px rgba(197, 168, 98, 0.1);
}

.counter-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #FAF7F0;
    border-radius: 8px;
    border: 1px solid rgba(65, 77, 62, 0.15);
    padding: 6px;
    width: 100%;
}

.counter-btn {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    border: none;
    background-color: #FFFFFF;
    color: var(--primary-dark);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    transition: all 0.2s ease;
}

.counter-btn:active {
    transform: scale(0.9);
}

.counter-val {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-dark);
}

.attendance-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.attendance-box {
    position: relative;
    cursor: pointer;
}

.attendance-box input {
    position: absolute;
    opacity: 0;
    width: 0; height: 0;
}

.attendance-custom {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 15px;
    background-color: #FAF7F0;
    border: 1px solid rgba(65, 77, 62, 0.15);
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-dark);
    transition: all 0.3s ease;
}

.attendance-custom i {
    font-size: 1.2rem;
    color: #999;
}

.attendance-box input:checked + .attendance-custom {
    background-color: var(--primary);
    color: var(--bg-cream);
    border-color: var(--primary);
    box-shadow: 0 4px 10px rgba(65, 77, 62, 0.15);
}

.attendance-box input:checked + .attendance-custom i {
    color: var(--accent);
}

.btn-submit {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary) 0%, #313a2f 100%);
    color: var(--bg-cream);
    border: none;
    border-radius: 30px;
    font-size: 0.8rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(65, 77, 62, 0.2);
    margin-top: 10px;
}

.btn-submit:active {
    transform: scale(0.97);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-8px); }
    60% { transform: translateY(-4px); }
}

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

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

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.main-content::-webkit-scrollbar {
    width: 4px;
}
.main-content::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.02);
}
.main-content::-webkit-scrollbar-thumb {
    background: rgba(197, 168, 98, 0.25);
    border-radius: 10px;
}

.floating-rsvp-btn {
    position: absolute;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%) scale(0.8);
    z-index: 890;
    padding: 12px 24px;
    background: rgba(197, 168, 98, 0.95); 
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(5px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0;
    pointer-events: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.floating-rsvp-btn.visible {
    opacity: 1;
    transform: translateX(-50%) scale(1);
    pointer-events: auto;
}

.floating-rsvp-btn:hover {
    background: var(--accent);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    transform: translateX(-50%) translateY(-2px) scale(1.03);
}

.floating-rsvp-btn:active {
    transform: translateX(-50%) scale(0.97);
}

@media (max-width: 375px) {
    .envelope-wrapper {
        transform: scale(0.85);
    }
    .open-btn {
        margin-top: 30px;
    }
}

@media (max-width: 320px) {
    .envelope-wrapper {
        transform: scale(0.72);
    }
    .open-btn {
        margin-top: 20px;
    }
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 33, 25, 0.7);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-box {
    background: var(--bg-cream);
    border: var(--border-gold);
    border-radius: 16px;
    padding: 25px;
    max-width: 340px;
    width: 90%;
    text-align: center;
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
    transform: scale(0.8);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .modal-box {
    transform: scale(1);
}

.modal-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--primary-dark);
    margin-bottom: 12px;
    font-weight: 600;
}

.modal-text {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: #555;
    line-height: 1.6;
    margin-bottom: 20px;
}

.modal-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary) 0%, #313a2f 100%);
    color: var(--bg-cream);
    border: none;
    border-radius: 30px;
    font-size: 0.8rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(65, 77, 62, 0.2);
}

.modal-btn:active {
    transform: scale(0.97);
}