:root {
    --primary-color: #6366f1;
    --secondary-color: #818cf8;
    --text-color: #1e293b;
    --light-text: #64748b;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.4);
    --shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: #f8fafc;
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
}

/* Background Image & Animation */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('artistic_bg_trendy.png');
    background-size: cover;
    background-position: center;
    filter: blur(5px) brightness(1.05);
    z-index: -1;
    animation: zoomBg 20s infinite alternate ease-in-out;
}

@keyframes zoomBg {
    from { transform: scale(1); }
    to { transform: scale(1.1); }
}

.container {
    width: 90%;
    max-width: 600px;
    text-align: center;
    padding: 2rem 0;
}

header {
    margin-bottom: 3rem;
    animation: fadeInDown 0.8s ease-out;
}

.title {
    font-family: 'Black Han Sans', sans-serif;
    font-size: 3.5rem;
    background: linear-gradient(45deg, #4f46e5, #ec4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-weight: 300;
    color: #475569;
    letter-spacing: -0.5px;
}

/* Glassmorphism Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    padding: 3rem 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: fadeInUp 1s ease-out;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.2);
}

.card-content {
    margin-bottom: 2.5rem;
}

.date-label {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 1.5rem;
}

.prompt-text {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.4;
    color: #0f172a;
    word-break: keep-all;
    min-height: 2.8em;
    display: flex;
    align-items: center;
    justify-content: center;
}

.divider {
    height: 1px;
    background: linear-gradient(to right, transparent, var(--glass-border), transparent);
    margin: 1.5rem 0;
}

.instruction {
    font-size: 0.95rem;
    color: var(--light-text);
}

/* Actions & Buttons */
.card-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    padding: 12px 24px;
    border-radius: 14px;
    border: none;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-color);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.8);
}

footer {
    margin-top: 3rem;
    font-size: 0.85rem;
    color: #64748b;
}

.footer-note {
    margin-top: 0.5rem;
    opacity: 0.6;
}

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* Mobile Responsive */
@media (max-width: 480px) {
    .title { font-size: 2.5rem; }
    .prompt-text { font-size: 1.5rem; }
    .glass-card { padding: 2rem 1.5rem; }
    .card-actions { flex-direction: column; }
}