/* Base Styles & Variables */
:root {
    --primary-color: #8c7365; /* Warm, earthy aesthetic brown */
    --primary-light: #bbaea5;
    --primary-dark: #5a493f;
    --accent-color: #d4af37; /* Soft gold for premium feel */
    --text-main: #333333;
    --text-light: #777777;
    --bg-light: #fdfbf9; /* Off-white / warm beige bg */
    --bg-white: #ffffff;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Pretendard', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-light);
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Noto Serif KR', serif;
    font-weight: 400;
    line-height: 1.3;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-center {
    text-align: center;
}

.section-padding {
    padding: 80px 0;
}

.bg-light {
    background-color: #f7f3ef;
}

/* Buttons */
.btn-primary {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--bg-white);
    padding: 15px 30px;
    border-radius: 4px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-primary-outline {
    display: inline-block;
    background-color: transparent;
    color: var(--primary-color);
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: 500;
    border: 1px solid var(--primary-color);
    transition: var(--transition);
}

.btn-primary-outline:hover {
    background-color: var(--primary-color);
    color: var(--bg-white);
}

.btn-secondary {
    display: inline-block;
    background-color: #ffe812; /* Kakao yellow */
    color: #3a1d1d;
    padding: 15px 30px;
    border-radius: 4px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-secondary:hover {
    background-color: #e6d110;
}

/* Header */
header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    color: var(--primary-dark);
    font-weight: 600;
}

nav a {
    margin-left: 30px;
    font-size: 0.95rem;
    font-weight: 500;
}

nav a:not(.btn-primary-outline):hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    background-image: url('hero_bg.png'); /* 생성된 프리미엄 헤드스파 이미지 */
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0,0,0,0.3), rgba(0,0,0,0.6));
}

.hero-content {
    position: relative;
    z-index: 1;
    color: var(--bg-white);
    max-width: 800px;
}

.hero-subtitle {
    font-size: 1rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 20px;
    color: var(--primary-light);
    font-family: 'Pretendard', sans-serif;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero-title strong {
    color: var(--accent-color);
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.9;
    font-family: 'Pretendard', sans-serif;
}

/* Pain Points Section */
.section-title {
    font-size: 2.2rem;
    margin-bottom: 10px;
    color: var(--primary-dark);
}

.section-subtitle {
    color: var(--text-light);
    margin-bottom: 50px;
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

/* Slider for Reviews */
.slider-container {
    overflow: hidden;
    width: 100%;
    position: relative;
    padding: 20px 0;
}

.slider-track {
    display: flex;
    gap: 30px;
    width: max-content;
    animation: scroll 30s linear infinite;
}

.slider-track:hover {
    animation-play-state: paused;
}

.slider-track .feature-card {
    width: 350px;
    flex-shrink: 0;
    white-space: normal;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(-50% - 15px)); } /* 50% for duplicated content */
}

.feature-card {
    background-color: var(--bg-white);
    padding: 40px 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.03);
    border-top: 3px solid var(--primary-color);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.06);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--primary-dark);
}

/* Programs Section */
.program-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.program-card {
    background: var(--bg-white);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.05);
}

.hook-card {
    border-left: 5px solid var(--primary-light);
}

.signature-card {
    border: 2px solid var(--accent-color);
}

.program-badge {
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--primary-color);
    color: white;
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: 0.8rem;
    font-weight: bold;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.program-badge.premium {
    background: var(--accent-color);
    color: #333;
}

.program-content {
    padding: 40px;
}

.program-content h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--primary-dark);
}

.program-desc {
    color: var(--text-light);
    margin-bottom: 25px;
    font-size: 1.05rem;
}

.program-details {
    background-color: var(--bg-light);
    padding: 20px;
    border-radius: 4px;
}

.program-details li {
    margin-bottom: 10px;
}

.program-details li:last-child {
    margin-bottom: 0;
    font-size: 1.1rem;
}

.program-details strong {
    color: var(--primary-dark);
}

/* Basic Programs */
.basic-programs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 10px;
}

.basic-card {
    background: var(--bg-white);
    padding: 25px;
    border-radius: 8px;
    border: 1px solid rgba(0,0,0,0.05);
    text-align: center;
}

.basic-card h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-dark);
}

.basic-card p {
    color: var(--text-light);
}

.basic-card p strong {
    display: block;
    margin-top: 10px;
    font-size: 1.2rem;
    color: var(--primary-color);
}

/* Philosophy Section */
.philosophy-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.philosophy-text h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.philosophy-text p {
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background-color: #e0d8d3;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
    color: var(--text-light);
}

/* Booking & Footer */
.booking-section {
    background-color: var(--primary-dark);
    color: var(--bg-white);
    padding: 80px 0 40px;
}

.booking-section h2 {
    color: var(--bg-white);
    font-size: 2rem;
    margin-bottom: 15px;
}

.booking-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 40px 0;
}

.footer-info {
    margin-top: 60px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 0.9rem;
    color: #aaaaaa;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title { font-size: 2rem; }
    .philosophy-grid { grid-template-columns: 1fr; }
    .booking-buttons { flex-direction: column; padding: 0 20px; }
    .program-badge { right: -40px; }
    .program-content h3 { font-size: 1.4rem; }
    .logo { font-size: 1.1rem; }
    nav a:not(.btn-primary-outline) { display: none; }
    nav a.btn-primary-outline { margin-left: 10px; padding: 8px 14px; font-size: 0.85rem; }
}