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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #0f172a;
    --bg-light: #1e293b;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --kakao: #FEE500;
    --kakao-text: #000000;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
}

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

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
}

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

.nav-links a {
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-cta {
    background: var(--primary);
    color: white !important;
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    transition: background 0.3s;
}

.nav-cta:hover {
    background: var(--primary-dark);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem 2rem 4rem;
    background: linear-gradient(135deg, var(--bg) 0%, var(--bg-light) 100%);
}

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

.badge {
    display: inline-block;
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero h1 span {
    color: var(--accent);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-kakao {
    background: var(--kakao);
    color: var(--kakao-text);
}

.btn-kakao:hover {
    background: #e6cf00;
    transform: translateY(-2px);
}

/* Sections */
.section {
    padding: 5rem 2rem;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

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

.feature-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 16px;
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.5;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Platforms */
.platforms-section {
    background: var(--bg-light);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.platform-card {
    background: var(--bg);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s;
}

.platform-card:hover {
    transform: translateY(-5px);
}

.platform-badge {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 auto 1rem;
}

.platform-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.platform-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Content Section */
.content-section {
    background: var(--bg);
}

.content-block {
    max-width: 800px;
    margin: 0 auto 3rem;
}

.content-block:last-child {
    margin-bottom: 0;
}

.content-block h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

.content-block h3 {
    font-size: 1.3rem;
    margin: 1.5rem 0 0.8rem;
}

.content-block p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.content-block ul {
    list-style: none;
    margin: 1rem 0;
}

.content-block li {
    color: var(--text-muted);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.content-block li::before {
    content: "•";
    color: var(--accent);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* FAQ */
.faq-section {
    background: var(--bg-light);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg);
    padding: 1.5rem 2rem;
    border-radius: 12px;
    margin-bottom: 1rem;
}

.faq-item h4 {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    color: var(--text);
}

.faq-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* CTA */
.cta {
    text-align: center;
    padding: 5rem 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
}

.cta h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.cta p {
    opacity: 0.9;
    margin-bottom: 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

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

.cta .btn-primary:hover {
    background: #f0f0f0;
}

/* Footer */
footer {
    background: var(--bg);
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.footer-desc {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: var(--text-muted);
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--text);
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Mobile */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .feature-card {
        flex-direction: column;
        text-align: center;
    }

    .hero-buttons,
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }
}