:root {
    --primary-color: #1a1a1a; /* 다크 그레이 */
    --accent-color: #D4AF37; /* 럭셔리 골드 */
    --bg-color: #f8f9fa; /* 밝은 크림 화이트 */
    --text-color: #333;
    --white: #ffffff;
}

body {
    font-family: 'Lato', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

h1, h2, h3, .logo {
    font-family: 'Playfair Display', serif;
}

.main-header {
    width: 100%;
    padding: 20px 0;
    text-align: center;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}
.dot { color: var(--accent-color); }

.container {
    max-width: 600px;
    width: 90%;
    margin-top: 40px;
    padding-bottom: 50px;
}

.card {
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    text-align: center;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
    width: 100%;
    margin-top: 20px;
}

.btn-primary:hover {
    background-color: #000;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--primary-color);
    padding: 10px 20px;
    cursor: pointer;
    margin-top: 10px;
}

.options-grid {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 20px;
}

.option-btn {
    padding: 15px;
    border: 1px solid #ddd;
    background: #fff;
    border-radius: 8px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s;
}

.option-btn:hover {
    border-color: var(--accent-color);
    background: #fffcf0;
}

.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
    margin: 20px 0;
}

.hidden { display: none; }

/* 애니메이션 */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(212, 175, 55, 0.7); }
    70% { transform: scale(1.02); box-shadow: 0 0 0 10px rgba(212, 175, 55, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(212, 175, 55, 0); }
}

/* 모바일 최적화 */
@media (max-width: 480px) {
    .card { padding: 25px; }
}