:root {
    /* Colors */
    --color-primary: #1a1a1a; /* Deep Navy/Black */
    --color-secondary: #f5f5f5; /* Off-white */
    --color-white: #ffffff;
    --color-accent: #8c8c8c; /* Grey for subtle text */
    
    /* Fonts */
    --font-main: 'Noto Sans KR', sans-serif;
    --font-serif: 'Nanum Myeongjo', serif;

    /* Spacing */
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Layout */
    --max-width: 1400px;
    --header-height: 80px;
}

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

body {
    font-family: var(--font-main);
    color: var(--color-primary);
    background-color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.3s ease;
}

a:hover {
    opacity: 0.7;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 500;
    line-height: 1.2;
}

.serif {
    font-family: var(--font-serif);
}

/* Utilities */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border: 1px solid var(--color-primary);
    background: transparent;
    color: var(--color-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.95);
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 1px;
}

nav ul {
    display: flex;
    gap: var(--spacing-md);
}

nav a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Footer */
footer {
    padding: var(--spacing-lg) var(--spacing-md);
    border-top: 1px solid rgba(0,0,0,0.05);
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-accent);
}

/* Hero Section (Common) */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
    position: relative;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3); /* Overlay for text readability */
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    font-weight: 300;
}

.hero-subtitle {
    font-size: 1rem;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}