/* Palet warna romantis */
:root {
    --pink-light: #FFD1DC;
    --lavender: #E6E6FA;
    --blue-light: #ADD8E6;
    --soft-purple: #D8BFD8;
    --peach: #FFDAB9;
    --cream: #FFF8DC;
    --text-dark: #333;
    --text-light: #555;
}

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

body {
    font-family: 'Georgia', serif;
    background: linear-gradient(135deg, var(--lavender) 0%, var(--pink-light) 50%, var(--blue-light) 100%);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Efek bintang berkedip */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: white;
    border-radius: 50%;
    animation: twinkle 3s infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* Efek bunga mekar */
.flower {
    position: absolute;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, var(--pink-light) 30%, transparent 30%),
                radial-gradient(circle, var(--lavender) 30%, transparent 30%);
    background-size: 15px 15px;
    background-position: 0 0, 8px 8px;
    opacity: 0.1;
    animation: bloom 10s infinite alternate;
    z-index: 0;
}

@keyframes bloom {
    0% { transform: scale(0.8) rotate(0deg); }
    100% { transform: scale(1.2) rotate(360deg); }
}

/* Kontainer utama */
.container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    animation: fadeIn 1.5s ease-out;
}

h1 {
    font-family: 'Brush Script MT', cursive;
    font-size: 3.5rem;
    color: var(--text-dark);
    text-shadow: 2px 2px 4px rgba(255, 255, 255, 0.5);
    margin-bottom: 10px;
    position: relative;
    display: inline-block;
}

h1::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--pink-light), transparent);
}

/* Section utama */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

/* Kartu input */
.input-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: slideInLeft 1s ease-out;
}

.input-card h2 {
    font-family: 'Georgia', serif;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.input-card p {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.6;
}

/* Form styling */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-dark);
    font-weight: bold;
}

input[type="text"],
input[type="number"],
input[type="date"],
select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--lavender);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.8);
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--pink-light);
    box-shadow: 0 0 10px rgba(255, 209, 220, 0.5);
}

.error-message {
    color: #ff6b6b;
    font-size: 0.9rem;
    margin-top: 5px;
    display: none;
}

/* Tombol */
.btn {
    background: linear-gradient(135deg, var(--pink-light), var(--lavender));
    color: var(--text-dark);
    border: none;
    padding: 12px 25px;
    border-radius: 25px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    display: inline-block;
    font-weight: bold;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 20px rgba(0, 0, 0, 0.15);
}

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

/* Kartu countdown */
.countdown-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: slideInRight 1s ease-out;
    text-align: center;
}

.countdown-display {
    font-size: 3rem;
    font-weight: bold;
    color: var(--text-dark);
    margin: 20px 0;
}

.countdown-message {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 20px;
    min-height: 30px;
}

.theme-selector {
    margin-top: 20px;
}

.theme-selector label {
    margin-bottom: 10px;
    display: block;
}

.theme-options {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 10px;
}

.theme-option {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.3s ease;
    border: 3px solid transparent;
}

.theme-option:hover {
    transform: scale(1.1);
}

.theme-option.selected {
    border-color: var(--text-dark);
}

/* Surat cinta */
.love-letter-card {
    grid-column: 1 / -1;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    animation: fadeInUp 1.5s ease-out;
    display: none;
}

.love-letter-content {
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="%23FFF8DC"/><path d="M0,0 L100,100 M100,0 L0,100" stroke="%23D2B48C" stroke-width="0.5" opacity="0.3"/></svg>');
    padding: 40px;
    border-radius: 10px;
    position: relative;
    min-height: 300px;
    text-align: center;
}

.love-letter-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 248, 220, 0.3);
    border-radius: 10px;
}

.love-letter-text {
    position: relative;
    z-index: 1;
    font-family: 'Georgia', serif;
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.wax-seal {
    position: absolute;
    bottom: 20px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, #ff6b6b, #ff4757);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 0.9rem;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
    z-index: 2;
}

.letter-options {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.letter-option {
    padding: 8px 20px;
    background: rgba(230, 230, 250, 0.5);
    border: 2px solid transparent;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.letter-option:hover,
.letter-option.selected {
    background: var(--lavender);
    border-color: var(--pink-light);
}

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

@keyframes slideInLeft {
    from { transform: translateX(-50px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideInRight {
    from { transform: translateX(50px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

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

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.heart-icon {
    display: inline-block;
    color: #ff6b6b;
    animation: heartbeat 1.5s infinite;
    margin: 0 5px;
}

/* Responsif */
@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    .countdown-display {
        font-size: 2rem;
    }
}

/* Tema latar */
.theme-night-sky {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.theme-sunset {
    background: linear-gradient(135deg, #ff7e5f 0%, #feb47b 50%, #ff9a56 100%);
}

.theme-flowers {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 50%, #ffeaa7 100%);
}

/* Pesan animasi */
.message-animation {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}