:root {
    --bg-color: #0b0d14;
    --card-bg: rgba(22, 27, 46, 0.7);
    --accent-cyan: #00f2fe;
    --accent-purple: #7f00ff;
    --accent-pink: #ff007f;
    --text-main: #f0f4f8;
    --text-muted: #94a3b8;
    --glass-border: rgba(255, 255, 255, 0.1);
    --nav-bg: rgba(11, 13, 20, 0.85);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    overflow-x: hidden;
    line-height: 1.6;
}

h1, h2, h3, .brand-logo {
    font-family: 'Orbitron', sans-serif;
}

/* Canvas Background Particle Effect */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2rem;
}

.brand-logo {
    font-size: 1.6rem;
    font-weight: 900;
    letter-spacing: 2px;
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-logo span {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    cursor: pointer;
}

.nav-links a:hover {
    color: var(--accent-cyan);
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2px;
    cursor: pointer;
}

.lang-btn {
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-muted);
    transition: all 0.3s ease;
    user-select: none;
}

.lang-btn.active {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    color: #fff;
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.4);
}

/* Hero Section */
.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 2rem 4rem 2rem;
    position: relative;
}

.hero-content {
    max-width: 800px;
}

.badge {
    display: inline-block;
    padding: 0.4rem 1.2rem;
    border-radius: 50px;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    word-break: keep-all;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 0.9rem 2rem;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 700;
    box-shadow: 0 0 20px rgba(0, 242, 254, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px rgba(0, 242, 254, 0.5);
}

/* About Section */
.about-section {
    max-width: 1200px;
    margin: 4rem auto 8rem auto;
    padding: 0 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.2rem;
    color: #fff;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-muted);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.about-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: 16px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.about-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-cyan);
}

.about-icon {
    font-size: 2.5rem;
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
}

.about-card h3 {
    font-size: 1.4rem;
    color: #fff;
    margin-bottom: 1rem;
}

.about-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    word-break: keep-all;
}

/* Page Layout for Privacy Policy */
.page-container {
    max-width: 900px;
    margin: 10rem auto 6rem auto;
    padding: 0 2rem;
}

.page-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-header h2 {
    font-size: 2rem;
    color: #fff;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.back-btn:hover {
    color: var(--accent-cyan);
}

.page-body {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    padding: 3rem;
    border-radius: 16px;
    backdrop-filter: blur(10px);
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
}

.page-body h4 {
    color: var(--text-main);
    margin: 1.5rem 0 0.5rem 0;
}

/* Footer Section */
footer {
    background: rgba(7, 9, 15, 0.95);
    border-top: 1px solid var(--glass-border);
    padding: 4rem 2rem 2rem 2rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #fff;
}

.footer-info p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    max-width: 500px;
    word-break: keep-all;
}

.contact-details {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.contact-details li {
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
}

.contact-details i {
    color: var(--accent-cyan);
    width: 20px;
}

.footer-links-title {
    color: #fff;
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-nav {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-nav a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
    cursor: pointer;
}

.footer-nav a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2.4rem; }
    .footer-container { grid-template-columns: 1fr; }
    .nav-container { flex-direction: column; gap: 1rem; }
    .nav-right { width: 100%; justify-content: space-between; }
}