:root {
    --primary: #2196F3;
    --primary-light: #64B5F6;
    --primary-dark: #1976D2;
    --white: #ffffff;
    --text-main: #333333;
    --text-muted: #666666;
    --bg-color: #E3F2FD;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Pretendard', sans-serif;
}

body {
    background: var(--bg-color);
    color: var(--text-main);
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* Background Animated Shapes */
.bg-shape {
    position: fixed;
    border-radius: 50%;
    z-index: -1;
    filter: blur(80px);
}

.shape1 {
    width: 300px;
    height: 300px;
    background: var(--primary-light);
    top: -100px;
    left: -100px;
}

.shape2 {
    width: 250px;
    height: 250px;
    background: #00BCD4;
    bottom: -50px;
    right: -50px;
    opacity: 0.6;
}

/* Header */
.glass-header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 10;
}

.glass-header h1 {
    font-size: 1.2rem;
    color: var(--primary-dark);
    font-weight: 700;
}

/* Container */
main {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 500px;
    margin: 0 auto;
}

/* Glassmorphism Box */
.glass-box {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: 1.5rem;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 2rem 1.5rem;
}

.hero h2 {
    font-size: 1.8rem;
    line-height: 1.4;
    margin-bottom: 0.8rem;
}

.hero .highlight {
    color: var(--primary);
}

.hero p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Booking Section */
.booking-section h3 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    color: var(--primary-dark);
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-group.half {
    flex: 1;
}

label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 0.4rem;
    color: var(--text-muted);
    font-weight: 600;
}

input, select {
    width: 100%;
    padding: 0.8rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.8);
    background: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
    color: var(--text-main);
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.2);
}

/* Button */
.submit-btn {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-top: 1rem;
}

.submit-btn:active {
    transform: scale(0.98);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.hidden {
    display: none;
}

#statusMessage {
    margin-top: 1rem;
    padding: 0.8rem;
    border-radius: 8px;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
}

.success-msg {
    background: #E8F5E9;
    color: #2E7D32;
}

.error-msg {
    background: #FFEBEE;
    color: #C62828;
}