/* Invitation Card Styles */

:root {
    --primary-cream: #f9f7f4;
    --primary-beige: #e8dfd3;
    --accent-pink: #df9fa0;
    --accent-gold: #9a7949;
    --text-dark: #1a1a1a;
    --text-light: #666;
    --white: #ffffff;
    --overlay-dark: rgba(0, 0, 0, 0.5);

    --font-heading: 'Playfair Display', serif;
    --font-script: 'Great Vibes', cursive;
    --font-body: 'Open Sans', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    background: var(--primary-cream);
    overflow-x: hidden;
}

/* ===========================
   Language Switcher
   =========================== */
.language-switcher {
    position: fixed;
    top: 30px;
    right: 30px;
    z-index: 9999;
}

/* ===========================
   Music Player
   =========================== */
.music-player {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
}

.music-toggle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--accent-gold);
    color: var(--white);
    font-size: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.music-toggle:hover {
    transform: scale(1.1);
    background: var(--accent-pink);
}

.music-toggle.playing {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.music-toggle.pulse-attention {
    animation: pulseAttention 1s ease-in-out infinite;
    box-shadow: 0 0 0 0 rgba(154, 121, 73, 0.7);
}

@keyframes pulseAttention {
    0% {
        box-shadow: 0 0 0 0 rgba(154, 121, 73, 0.7);
    }
    50% {
        box-shadow: 0 0 0 15px rgba(154, 121, 73, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(154, 121, 73, 0);
    }
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--white);
    border: 2px solid var(--accent-gold);
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.lang-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    background: var(--primary-cream);
}

.lang-flag {
    font-size: 1.5rem;
}

.lang-text {
    font-weight: 600;
    color: var(--accent-gold);
    font-size: 0.9rem;
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--white);
    border: 2px solid var(--accent-gold);
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    min-width: 180px;
}

.language-switcher.active .lang-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--white);
    border: none;
    border-bottom: 1px solid var(--primary-beige);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    font-size: 1rem;
}

.lang-option:last-child {
    border-bottom: none;
}

.lang-option:hover {
    background: var(--primary-cream);
}

.lang-option.active {
    background: linear-gradient(135deg, rgba(223, 159, 160, 0.1), rgba(154, 121, 73, 0.1));
    color: var(--accent-gold);
    font-weight: 600;
}

/* ===========================
   Loading Screen
   =========================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: linear-gradient(135deg, var(--accent-pink) 0%, var(--accent-gold) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: var(--white);
}

.loading-heart {
    font-size: 4rem;
    margin-bottom: 2rem;
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.2); }
    50% { transform: scale(1); }
}

.loading-text h2 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.loading-bar {
    width: 300px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    overflow: hidden;
}

.loading-progress {
    height: 100%;
    background: var(--white);
    border-radius: 10px;
    animation: loadingProgress 2s ease-in-out;
}

@keyframes loadingProgress {
    0% { width: 0%; }
    100% { width: 100%; }
}

/* ===========================
   Invitation Cover with Envelope
   =========================== */
.invitation-cover {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.8s ease;
    z-index: 100;
}

.invitation-cover.active {
    opacity: 1;
}

.invitation-cover.opening {
    animation: fadeOutCover 1.5s ease forwards;
}

@keyframes fadeOutCover {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

.cover-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(223, 159, 160, 0.3) 0%, rgba(154, 121, 73, 0.3) 100%),
                url('https://images.unsplash.com/photo-1519741497674-611481863552?w=1920') center/cover;
    filter: brightness(0.5);
}

/* ===========================
   Bouncing Envelope
   =========================== */
.envelope-container {
    position: relative;
    z-index: 2;
    text-align: center;
    animation: envelopeBounce 2s ease-in-out infinite;
}

@keyframes envelopeBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-30px); }
}

.envelope {
    position: relative;
    width: 500px;
    height: 350px;
    cursor: pointer;
    transition: transform 0.3s ease;
    transform-style: preserve-3d;
}

.envelope:hover {
    transform: scale(1.05);
}

/* Touch preview mirrors :hover state on mobile */
.envelope.touch-preview {
    transform: scale(1.05);
}

.envelope.clicked {
    animation: envelopeOpen 1.5s ease forwards;
}

@keyframes envelopeOpen {
    0% {
        transform: scale(1);
    }
    30% {
        transform: scale(1.1) rotateY(0deg);
    }
    60% {
        transform: scale(0.9) rotateY(180deg);
    }
    100% {
        transform: scale(0) rotateY(360deg);
        opacity: 0;
    }
}

/* Envelope Body */
.envelope-body {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #ffffff 0%, #f5f0e8 100%);
    border-radius: 10px;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.4);
    border: 3px solid var(--accent-gold);
    overflow: hidden;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

/* Envelope Flap */
.envelope-flap {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: linear-gradient(135deg, #dfa6a7 0%, #b89968 100%);
    clip-path: polygon(0 0, 50% 60%, 100% 0);
    transform-origin: 50% 0%;
    z-index: 3;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3), inset 0 -2px 5px rgba(0, 0, 0, 0.1);
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.envelope:hover .envelope-flap {
    transform: rotateX(-180deg);
}

.envelope.touch-preview .envelope-flap {
    transform: rotateX(-180deg);
}

.envelope.clicked .envelope-flap {
    animation: flapOpen 1s ease forwards;
}

@keyframes flapOpen {
    0% {
        transform: rotateX(0deg);
    }
    50% {
        transform: rotateX(-180deg);
    }
    100% {
        transform: rotateX(-180deg);
        opacity: 0;
    }
}

/* Envelope Seal */
.envelope-seal {
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #e8b4b5 0%, #c99d61 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 4;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.4), inset 0 2px 5px rgba(255, 255, 255, 0.3);
    border: 3px solid rgba(255, 255, 255, 0.5);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.envelope:hover .envelope-seal {
    opacity: 0;
}

.envelope.touch-preview .envelope-seal {
    opacity: 0;
}

.envelope.clicked .envelope-seal {
    animation: sealHide 3s ease forwards;
}

@keyframes sealHide {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
    100% {
        opacity: 0;
    }
}

.envelope-seal i {
    color: var(--white);
    font-size: 1.6rem;
    animation: heartPulse 1.5s ease-in-out infinite;
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
}

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

/* Envelope Decoration */
.envelope-decoration {
    position: absolute;
    top: 15px;
    right: 15px;
}

.stamp {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, #ffffff 0%, #f9f7f4 100%);
    border: 2px dashed var(--accent-gold);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.stamp i {
    color: var(--accent-gold);
    font-size: 1.6rem;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}

/* Letter Inside */
.letter-inside {
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 85%;
    height: 75%;
    background: linear-gradient(to bottom, #ffffff 0%, #fdfcfa 100%);
    border-radius: 8px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25), inset 0 1px 3px rgba(255, 255, 255, 0.8);
    border: 2px solid rgba(154, 121, 73, 0.2);
    z-index: 1;
    opacity: 0;
    visibility: hidden;
    transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.envelope:hover .letter-inside {
    opacity: 1;
    visibility: visible;
    top: -15%;
    transform: translate(-50%, 0);
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.4), inset 0 1px 3px rgba(255, 255, 255, 0.8);
    z-index: 9;
}

.envelope.touch-preview .letter-inside {
    opacity: 1;
    visibility: visible;
    top: -15%;
    transform: translate(-50%, 0);
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.4), inset 0 1px 3px rgba(255, 255, 255, 0.8);
    z-index: 9;
}

.letter-text {
    padding: 2rem 1.5rem;
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.5rem;
}

.letter-to {
    font-size: 0.75rem;
    color: var(--accent-gold);
    font-style: italic;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
}
.to-wedding {
    font-size: 0.75rem;
    color: var(--accent-gold);
    font-style: italic;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.letter-names {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--text-dark);
    margin: 0.5rem 0;
    font-weight: 700;
    line-height: 1.2;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.letter-date {
    font-size: 0.95rem;
    color: var(--accent-gold);
    letter-spacing: 3px;
    font-weight: 600;
    margin-top: 0.5rem;
}

.guest-name {
    margin-top: 0.25rem;
    font-family: var(--font-heading, "Playfair Display", serif);
    font-size: 1.1rem;
    color: #1a1a1a;
}

/* Click Hint */
.click-hint {
    margin-top: 3rem;
    color: var(--white);
    font-size: 1.2rem;
    font-family: var(--font-heading);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    animation: pulseHint 2s ease-in-out infinite;
}

@keyframes pulseHint {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Floating Petals */
.floating-petals {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.petal {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--white);
    opacity: 0.3;
    border-radius: 50% 0;
    animation: float 10s infinite;
}

.petal:nth-child(1) { left: 10%; animation-delay: 0s; }
.petal:nth-child(2) { left: 30%; animation-delay: 2s; }
.petal:nth-child(3) { left: 50%; animation-delay: 4s; }
.petal:nth-child(4) { left: 70%; animation-delay: 1s; }
.petal:nth-child(5) { left: 90%; animation-delay: 3s; }

@keyframes float {
    0% {
        transform: translateY(-100px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0;
    }
}

/* ===========================
   Invitation Opened (Two Sides)
   =========================== */
.invitation-opened {
    min-height: 100vh;
    padding: 4rem 2rem;
    background: var(--primary-cream);
    display: none;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.invitation-opened.active {
    display: block;
    animation: fadeIn 0.8s ease forwards;
}

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

.invitation-container {
    max-width: 1400px;
    margin: 0 auto 3rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    perspective: 2000px;
}

.card-side {
    background: var(--white);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    padding: 3rem;
    min-height: 600px;
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
    animation: cardReveal 1.2s ease both;
}

.card-side::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        linear-gradient(135deg, transparent 10px, var(--white) 10px),
        linear-gradient(-135deg, transparent 10px, var(--white) 10px);
    background-position: top left, top right;
    background-repeat: repeat-y;
    background-size: 20px 20px;
    pointer-events: none;
    opacity: 0.3;
}

.left-side {
    animation-delay: 0.2s;
    border: 3px solid var(--primary-beige);
    transform-origin: right center;
}

.right-side {
    animation-delay: 0.4s;
    border: 3px solid var(--accent-pink);
    transform-origin: left center;
}

@keyframes cardReveal {
    0% {
        opacity: 0;
        transform: translateY(100px) scale(0.8);
    }
    50% {
        opacity: 0.5;
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.card-content {
    position: relative;
    z-index: 1;
}

.card-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--primary-beige);
}

.header-ornament {
    width: 80px;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--accent-gold), transparent);
    margin: 1rem auto;
}

.invitation-label {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--accent-gold);
    letter-spacing: 3px;
    font-weight: 600;
}

/* Left Side Content */
.couple-introduction {
    text-align: center;
    padding: 2rem 0;
}

.intro-ornament {
    width: 100px;
    height: 50px;
    margin: 0 auto 2rem;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 50"><path d="M10 25 Q 30 5, 50 25 T 90 25" stroke="%239a7949" stroke-width="2" fill="none"/></svg>') center/contain no-repeat;
}

.intro-ornament.bottom-ornament {
    transform: rotate(180deg);
    margin: 2rem auto 0;
}

.intro-text {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    font-style: italic;
}

.couple-names-display {
    margin: 3rem 0;
}

.display-name {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    margin: 0.5rem 0;
    font-weight: 700;
}

.display-name.groom {
    color: var(--accent-gold);
}

.display-name.bride {
    color: var(--accent-pink);
}

.name-separator {
    margin: 1.5rem 0;
    font-size: 2rem;
    color: var(--accent-pink);
}

.wedding-info-brief {
    margin: 3rem 0;
}

.info-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 1rem 0;
    font-size: 1.1rem;
    color: var(--text-dark);
}

.info-item i {
    color: var(--accent-gold);
    font-size: 1.3rem;
}

.card-quote {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--primary-cream);
    border-radius: 15px;
    text-align: center;
}

.card-quote p {
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.8;
    font-style: italic;
    margin: 1rem 0;
}

.card-quote i {
    color: var(--accent-pink);
    font-size: 1.5rem;
}

/* Right Side Content */
.family-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 3rem;
}

.family-section {
    text-align: center;
    padding: 2rem;
    background: var(--primary-cream);
    border-radius: 15px;
    border: 2px dashed var(--primary-beige);
}

.family-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.family-section.groom-family .family-icon {
    color: var(--accent-gold);
}

.family-section.bride-family .family-icon {
    color: var(--accent-pink);
}

.family-section h4 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.parent-name {
    font-size: 1rem;
    color: var(--text-dark);
    margin: 0.5rem 0;
    font-weight: 600;
}

.family-divider {
    width: 50px;
    height: 2px;
    background: var(--accent-gold);
    margin: 1rem auto;
}

.child-name {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

.family-heart {
    text-align: center;
    font-size: 2rem;
    color: var(--accent-pink);
    animation: heartbeat 2s infinite;
}

.venue-brief {
    text-align: center;
    padding: 2rem;
    background: var(--primary-beige);
    border-radius: 15px;
    margin-bottom: 2rem;
}

.venue-icon {
    font-size: 3rem;
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.venue-brief h4 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.venue-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 0.5rem 0;
}

.venue-address {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.6;
}

.invitation-message {
    text-align: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-gold));
    border-radius: 15px;
    color: var(--white);
}

.invitation-message p {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    line-height: 1.6;
    font-style: italic;
}

/* Action Buttons */
.action-buttons {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    gap: 3.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 30px;
}

.action-btn {
    flex: 1;
    min-width: 250px;
    padding: 1.5rem 2.5rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
    border: none;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.primary-btn {
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-gold));
    color: var(--white);
}

.primary-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(223, 159, 160, 0.4);
}

.secondary-btn {
    background: var(--white);
    color: var(--accent-gold);
    border: 2px solid var(--accent-gold);
}

.secondary-btn:hover {
    background: var(--accent-gold);
    color: var(--white);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(154, 121, 73, 0.4);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .invitation-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .card-side {
        min-height: auto;
    }

    .envelope {
        width: 280px;
        height: 175px;
    }
}

@media (max-width: 768px) {
    .language-switcher {
        top: 20px;
        right: 20px;
    }

    .lang-toggle {
        padding: 0.6rem 1rem;
        gap: 0.4rem;
    }

    .lang-flag {
        font-size: 1.3rem;
    }

    .lang-text {
        font-size: 0.8rem;
    }

    .music-player {
        bottom: 20px;
        right: 20px;
    }

    .music-toggle {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }

    .envelope {
        width: 260px;
        height: 160px;
    }

    .envelope-seal {
        width: 45px;
        height: 45px;
        top: 20px;
    }

    .envelope-seal i {
        font-size: 1.2rem;
    }

    .stamp {
        width: 45px;
        height: 45px;
    }

    .stamp i {
        font-size: 1.2rem;
    }

    /* Hide these elements in mobile */
    .letter-names,
    .to-wedding,
    .letter-date {
        display: none;
    }

    /* Style guest name for mobile */
    .guest-name {
        font-size: 1.3rem;
        font-weight: 700;
        margin: 0;
        color: #1a1a1a;
    }

    .letter-text {
        padding: 1.5rem 1rem;
        margin: 0;
        line-height: 1.5;
        gap: 0.5rem;
    }

    .click-hint {
        font-size: 1rem;
        margin-top: 2rem;
    }

    .display-name {
        font-size: 2.5rem;
    }

    .card-side {
        padding: 2rem;
    }

    .action-buttons {
        flex-direction: column;
        gap: 1rem;
    }

    .action-btn {
        min-width: 100%;
    }
}

@media (max-width: 480px) {
    .envelope {
        width: 240px;
        height: 150px;
    }

    .envelope-seal {
        width: 40px;
        height: 40px;
    }

    .envelope-seal i {
        font-size: 1rem;
    }

    .stamp {
        width: 40px;
        height: 40px;
    }

    .stamp i {
        font-size: 1rem;
    }

    /* Hide these elements in mobile - already hidden from 768px */
    .letter-names,
    .to-wedding,
    .letter-date {
        display: none;
    }

    /* Style guest name for smaller mobile */
    .guest-name {
        font-size: 1.1rem;
        font-weight: 700;
        margin: 0;
    }

    .letter-text {
        padding: 1rem 0.75rem;
        gap: 0.3rem;
        line-height: 1.4;
    }

    .click-hint {
        font-size: 0.9rem;
    }

    .display-name {
        font-size: 2rem;
    }

    .invitation-opened {
        padding: 2rem 1rem;
    }

    .card-side {
        padding: 1.5rem;
    }
}