/* ========================================
   Birthday Vault — Romantic Emotional Redesign
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Dancing+Script:wght@400;700&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&family=Poppins:wght@300;400;500;600&display=swap');

:root {
    /* Vibrant Velvet Rose Background */
    --bg-color: #120005;
    --bg-gradient: radial-gradient(circle at 50% 0%, #6b0022 0%, #3a0014 50%, #120005 100%);
    
    /* Intensely Vibrant Romantic Palette */
    --accent-red: #ff0844;
    --accent-pink: #ff3366;
    --accent-light-pink: #ff85a2;
    --accent-gold: #ffdf00;
    --accent-rose-gold: #ffb199;
    
    /* Text */
    --text-main: #ffffff;
    --text-muted: #fcd5ce;
    --text-dark: #2d2d2d;
    
    /* Glassmorphism (Brighter for more pop) */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.25);
    --glass-shadow: 0 15px 40px 0 rgba(0, 0, 0, 0.5);
    
    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-script: 'Dancing Script', cursive;
    --font-body: 'Poppins', sans-serif;
    
    /* Animations */
    --transition-smooth: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* ========================================
   GLOBAL STYLES
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-color);
    background-image: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100dvh;
    overflow-x: hidden;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.3);
}
::-webkit-scrollbar-thumb {
    background: var(--accent-pink);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-red);
}

.hidden {
    display: none !important;
}

/* Particles Canvas */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ========================================
   LOCK SCREEN (Centered & Emotional)
   ======================================== */
.lock-screen {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    background-image: var(--bg-gradient);
    transition: opacity 1.5s ease, transform 1.5s ease;
    padding: 1rem;
}

.lock-screen.unlocking {
    opacity: 0;
    transform: scale(1.1);
    pointer-events: none;
}

.lock-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 3.5rem 2.5rem;
    max-width: 420px;
    width: 100%;
    text-align: center;
    box-shadow: var(--glass-shadow);
    animation: float 6s ease-in-out infinite;
    position: relative;
    z-index: 1;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

.lock-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--accent-red), var(--accent-pink));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 30px rgba(255, 77, 109, 0.5);
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); box-shadow: 0 0 20px rgba(255, 77, 109, 0.4); }
    15% { transform: scale(1.15); box-shadow: 0 0 40px rgba(255, 77, 109, 0.7); }
    30% { transform: scale(1); box-shadow: 0 0 20px rgba(255, 77, 109, 0.4); }
    45% { transform: scale(1.15); box-shadow: 0 0 40px rgba(255, 77, 109, 0.7); }
    100% { transform: scale(1); box-shadow: 0 0 20px rgba(255, 77, 109, 0.4); }
}

.lock-icon svg {
    width: 40px;
    height: 40px;
    fill: white;
}

.lock-title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #fff, var(--accent-light-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.lock-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.password-group {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.password-input {
    width: 100%;
    padding: 1.2rem;
    background: rgba(255, 255, 255, 0.08);
    border: 2px solid transparent;
    border-radius: 15px;
    color: white;
    font-family: var(--font-body);
    font-size: 1.2rem;
    text-align: center;
    letter-spacing: 4px;
    outline: none;
    transition: var(--transition-smooth);
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.2);
}

.password-input:focus {
    border-color: var(--accent-pink);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 0 20px rgba(255, 117, 143, 0.3), inset 0 2px 10px rgba(0,0,0,0.2);
}

.password-input::placeholder {
    color: rgba(255,255,255,0.4);
    letter-spacing: 2px;
    font-size: 1rem;
}

.unlock-btn {
    width: 100%;
    padding: 1.2rem;
    background: linear-gradient(135deg, var(--accent-red), var(--accent-pink));
    border: none;
    border-radius: 15px;
    color: white;
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 10px 20px rgba(255, 77, 109, 0.3);
    position: relative;
    overflow: hidden;
}

.unlock-btn::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,0.3) 50%, rgba(255,255,255,0) 100%);
    transform: rotate(45deg);
    transition: all 0.5s ease;
    opacity: 0;
}

.unlock-btn:hover::after {
    animation: shine 1.5s ease-in-out;
}

@keyframes shine {
    0% { left: -50%; opacity: 0; }
    50% { opacity: 1; }
    100% { left: 150%; opacity: 0; }
}

.unlock-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(255, 77, 109, 0.5);
}

.unlock-btn:active {
    transform: translateY(1px);
}

.format-hint {
    color: var(--accent-gold);
    font-size: 0.85rem;
    letter-spacing: 2px;
    font-weight: 500;
    margin-top: -0.5rem;
}

.error-msg {
    color: #ff3333;
    font-size: 0.95rem;
    min-height: 1.5rem;
    margin-top: 1rem;
    font-weight: 500;
}

.hint-text {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 1.5rem;
    font-style: italic;
    opacity: 0.8;
}

.shake {
    animation: shakeError 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

@keyframes shakeError {
    10%, 90% { transform: translate3d(-2px, 0, 0); }
    20%, 80% { transform: translate3d(4px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-8px, 0, 0); }
    40%, 60% { transform: translate3d(8px, 0, 0); }
}

/* ========================================
   MAIN CONTENT WRAPPER
   ======================================== */
.main-content {
    position: relative;
    z-index: 10;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero-section {
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 2rem;
    width: 100%;
}

.hero-content {
    max-width: 800px;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero-eyebrow {
    font-family: var(--font-body);
    font-size: 1.2rem;
    color: var(--accent-gold);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    animation: fadeUp 1.2s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

.hero-title {
    margin-bottom: 2rem;
}

.title-line {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
    line-height: 1.2;
    background: linear-gradient(to right, #ffffff, var(--accent-light-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeUp 1.2s ease 0.3s forwards;
    opacity: 0;
    transform: translateY(20px);
}

.title-name {
    display: block;
    font-family: var(--font-script);
    font-size: clamp(4rem, 10vw, 7rem);
    color: var(--accent-pink);
    text-shadow: 0 0 30px rgba(255, 117, 143, 0.5);
    margin-top: -10px;
    animation: fadeUp 1.2s ease 0.6s forwards;
    opacity: 0;
    transform: translateY(20px);
}

.hero-message {
    font-size: clamp(1.1rem, 3vw, 1.4rem);
    color: var(--text-muted);
    font-weight: 300;
    line-height: 1.8;
    margin-bottom: 3rem;
    animation: fadeUp 1.2s ease 0.9s forwards;
    opacity: 0;
    transform: translateY(20px);
}

.scroll-down-btn {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    color: var(--accent-light-pink);
    text-decoration: none;
    font-size: 1rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    animation: fadeUp 1.2s ease 1.2s forwards, bobbing 2s infinite ease-in-out 2s;
    opacity: 0;
}

.scroll-down-btn span {
    margin-bottom: 0.5rem;
}

.scroll-arrow {
    font-size: 2rem;
}

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

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

/* ========================================
   COUNTDOWN SECTION
   ======================================== */
.countdown-section {
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5rem 2rem;
    position: relative;
    background: radial-gradient(circle at center, rgba(255, 77, 109, 0.05) 0%, transparent 70%);
}

.section-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    text-align: center;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
    color: white;
}

.section-title.script-text {
    font-family: var(--font-script);
    font-size: clamp(3rem, 7vw, 4.5rem);
    color: var(--accent-gold);
    text-shadow: 0 0 20px rgba(255, 214, 10, 0.3);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-muted);
    margin-bottom: 4rem;
    font-weight: 300;
}

.countdown-timer {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.countdown-unit {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    min-width: 150px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
    transition: var(--transition-smooth);
}

.countdown-unit:hover {
    transform: translateY(-10px);
    border-color: var(--accent-pink);
    box-shadow: 0 20px 40px rgba(255, 117, 143, 0.2);
}

.countdown-value {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 8vw, 4.5rem);
    font-weight: 700;
    background: linear-gradient(135deg, #fff, var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.countdown-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--accent-light-pink);
}

.countdown-message {
    font-family: var(--font-script);
    font-size: 2rem;
    color: var(--accent-gold);
    margin-top: 2rem;
}

/* ========================================
   GIFTS SECTION
   ======================================== */
.gifts-section {
    padding: 8rem 2rem;
    position: relative;
    background: linear-gradient(to bottom, transparent, rgba(0,0,0,0.3));
}

.gifts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.gift-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
}

.gift-card:hover {
    transform: translateY(-15px);
    border-color: var(--accent-pink);
    box-shadow: 0 20px 40px rgba(255, 117, 143, 0.2);
}

.gift-card-media {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.gift-card:hover .gift-card-media {
    transform: scale(1.05);
}

.gift-card-file-preview {
    width: 100%;
    aspect-ratio: 4/3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(255,77,109,0.1), rgba(255,214,10,0.1));
    gap: 1rem;
}

.file-icon {
    font-size: 4rem;
    filter: drop-shadow(0 10px 15px rgba(0,0,0,0.3));
}

.file-name {
    font-size: 0.9rem;
    color: var(--text-muted);
    padding: 0 1rem;
    text-align: center;
    word-break: break-all;
}

.gift-card-body {
    padding: 2rem;
    position: relative;
    z-index: 2;
    background: linear-gradient(to top, rgba(15,12,41,1), rgba(15,12,41,0.8));
}

.gift-card-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: white;
    margin-bottom: 0.8rem;
}

.gift-card-message {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

.gift-card-type {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(5px);
    padding: 0.4rem 1rem;
    border-radius: 30px;
    font-size: 0.75rem;
    letter-spacing: 2px;
    color: var(--accent-light-pink);
    z-index: 3;
    border: 1px solid rgba(255,255,255,0.1);
}

.play-badge {
    margin-top: 1rem;
    padding: 0.6rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-red), var(--accent-pink));
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    color: white;
    box-shadow: 0 5px 15px rgba(255,77,109,0.3);
}

/* ========== LOVE LETTER SECTION ========== */
.letter-section {
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5rem 2rem;
    background: radial-gradient(circle at center, rgba(255, 77, 109, 0.08) 0%, transparent 60%);
}

.letter-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 4rem;
    max-width: 800px;
    width: 100%;
    box-shadow: var(--glass-shadow), 0 0 50px rgba(255, 77, 109, 0.1);
    position: relative;
}

.letter-card::before {
    content: '💌';
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 4rem;
    filter: drop-shadow(0 10px 10px rgba(0,0,0,0.3));
    animation: float 4s ease-in-out infinite;
}

.letter-title {
    font-family: var(--font-script);
    font-size: clamp(2.5rem, 6vw, 4rem);
    color: var(--accent-gold);
    text-align: center;
    margin-bottom: 2.5rem;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.letter-content {
    font-family: var(--font-heading);
}

.letter-content p {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    line-height: 2;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* ========== FOOTER ========== */
.footer {
    text-align: center;
    padding: 4rem 2rem;
    border-top: 1px solid var(--glass-border);
    background: rgba(0,0,0,0.3);
}

.footer-hearts {
    font-size: 2rem;
    letter-spacing: 15px;
    margin-bottom: 1.5rem;
    animation: heartbeat 2s infinite;
}

.footer-text {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.footer-year {
    font-family: var(--font-script);
    color: var(--accent-pink);
    font-size: 1.5rem;
}

/* ========== LIGHTBOX ========== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0,0,0,0.95);
    backdrop-filter: blur(15px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    opacity: 1;
    transition: opacity 0.3s ease;
}

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

.lightbox-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    z-index: 10;
}

.lightbox-close:hover {
    background: var(--accent-red);
    transform: rotate(90deg);
}

.lightbox-content {
    max-width: 90vw;
    max-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes bloomReveal {
    0% { transform: scale(0.8) translateY(30px); opacity: 0; filter: blur(15px); }
    100% { transform: scale(1) translateY(0); opacity: 1; filter: blur(0); }
}

.lightbox-content.active {
    animation: bloomReveal 0.7s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

.lightbox-caption {
    margin-top: 2rem;
    text-align: center;
    max-width: 800px;
    opacity: 0;
}

.lightbox-caption.active {
    animation: bloomReveal 0.7s cubic-bezier(0.25, 0.8, 0.25, 1) 0.2s forwards;
}

.lightbox-content img, .lightbox-content video {
    max-width: 100%;
    max-height: 75vh;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    object-fit: contain;
}

.lightbox-caption h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--accent-light-pink);
    margin-bottom: 0.5rem;
}

.lightbox-caption p {
    font-size: 1.1rem;
    color: var(--text-muted);
}

/* Audio Player */
.audio-player-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 3rem;
    text-align: center;
    width: 100%;
    max-width: 500px;
}

.audio-player-icon { font-size: 5rem; margin-bottom: 1.5rem; }
.audio-player-title { font-family: var(--font-heading); font-size: 1.8rem; color: white; margin-bottom: 2rem; }
.audio-controls { display: flex; align-items: center; gap: 1.5rem; margin-bottom: 2rem; }
.audio-play-btn { width: 60px; height: 60px; border-radius: 50%; background: var(--accent-pink); border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; color: white; transition: 0.3s; }
.audio-play-btn:hover { transform: scale(1.1); background: var(--accent-red); }
.audio-progress-container { flex: 1; height: 8px; background: rgba(255,255,255,0.1); border-radius: 4px; cursor: pointer; position: relative; }
.audio-progress-bar { height: 100%; background: var(--accent-gold); border-radius: 4px; width: 0%; }
.audio-time { font-size: 0.9rem; color: var(--text-muted); width: 100px; text-align: right; }

.audio-download-btn, .pdf-download-btn, .generic-download-btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: rgba(255,255,255,0.1);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    margin-top: 1rem;
    border: 1px solid rgba(255,255,255,0.2);
    transition: 0.3s;
}
.audio-download-btn:hover, .pdf-download-btn:hover, .generic-download-btn:hover {
    background: var(--accent-pink);
}

.pdf-viewer-container { width: 90vw; height: 80vh; display: flex; flex-direction: column; align-items: center; gap: 1rem; }
.pdf-iframe { width: 100%; flex: 1; border-radius: 20px; border: none; background: white; }

/* ========================================
   RESPONSIVE DESIGN (Mobile First & Immersive)
   ======================================== */

/* Scroll animations */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 1s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1024px) {
    .gifts-grid { grid-template-columns: repeat(2, 1fr); }
    .countdown-timer { gap: 1.5rem; }
}

@media (max-width: 768px) {
    /* Make lock screen fill mobile tightly */
    .lock-card { padding: 2.5rem 1.5rem; border-radius: 25px; }
    .lock-title { font-size: 1.8rem; }
    
    .hero-section { padding: 1.5rem; }
    .title-line { font-size: clamp(2.5rem, 10vw, 4rem); }
    .title-name { font-size: clamp(3.5rem, 12vw, 5rem); }
    
    .countdown-section { padding: 4rem 1.5rem; }
    .countdown-timer { grid-template-columns: 1fr 1fr; display: grid; gap: 1rem; }
    .countdown-unit { min-width: 0; padding: 1.5rem 1rem; }
    .countdown-value { font-size: 2.5rem; }
    
    .gifts-section { padding: 4rem 1.5rem; }
    .gifts-grid { grid-template-columns: 1fr; gap: 2rem; }
    
    .letter-section { padding: 4rem 1.5rem; }
    .letter-card { padding: 2.5rem 1.5rem; border-radius: 20px; }
    .letter-title { font-size: 2.2rem; }
    .letter-content p { font-size: 1.05rem; }
    
    .lightbox-close { top: 1rem; right: 1rem; width: 45px; height: 45px; font-size: 1.5rem; }
    .audio-player-container { padding: 2rem 1.5rem; }
    .audio-controls { flex-wrap: wrap; justify-content: center; }
    .audio-progress-container { min-width: 100%; margin-top: 1rem; }
    .audio-time { text-align: center; width: 100%; margin-top: 0.5rem; }
}

@media (max-width: 480px) {
    /* Ultra mobile optimization */
    .lock-card { padding: 2rem 1rem; }
    .password-input { padding: 1rem; font-size: 1.1rem; }
    
    .hero-eyebrow { font-size: 1rem; }
    .hero-message { font-size: 1rem; }
    
    .countdown-unit { padding: 1rem; }
    .countdown-value { font-size: 2rem; }
    .countdown-label { font-size: 0.75rem; }
    
    .letter-card { padding: 2rem 1rem; }
    .letter-content p { font-size: 1rem; line-height: 1.8; }
}