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

:root {
    --primary: #0f172a;
    --accent: #6366f1;
    --accent-light: #818cf8;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --surface: #1e293b;
    --surface2: #0f172a;
    --border: #334155;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Pretendard', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--primary);
    color: var(--text);
    line-height: 1.6;
}

/* NAV */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.5px;
}

.nav-logo span {
    color: var(--accent-light);
}

.nav-cta {
    background: var(--accent);
    color: #fff;
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    transition: background 0.2s;
}

.nav-cta:hover {
    background: #4f46e5;
}

/* HERO */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 2rem 6rem;
    background: radial-gradient(ellipse at 50% 0%, rgba(99,102,241,0.15) 0%, transparent 70%);
}

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

.hero-badge {
    display: inline-block;
    background: rgba(99,102,241,0.15);
    color: var(--accent-light);
    border: 1px solid rgba(99,102,241,0.3);
    padding: 0.35rem 1rem;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 1.5rem;
}

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

.hero p {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 580px;
    margin: 0 auto 2.5rem;
}

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

.btn-primary {
    background: var(--accent);
    color: #fff;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 700;
    transition: transform 0.2s, background 0.2s;
    display: inline-block;
}

.btn-primary:hover {
    background: #4f46e5;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--text);
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    border: 1px solid var(--border);
    transition: border-color 0.2s, transform 0.2s;
    display: inline-block;
}

.btn-secondary:hover {
    border-color: var(--accent-light);
    transform: translateY(-2px);
}

.hero-price-note {
    margin-top: 2rem;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.hero-price-note strong {
    color: var(--text);
}

/* SECTION COMMON */
section {
    padding: 6rem 2rem;
}

.section-inner {
    max-width: 1000px;
    margin: 0 auto;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--accent-light);
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 1rem;
    line-height: 1.25;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 600px;
}

/* WHAT YOU GET */
.what {
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.what-header {
    margin-bottom: 3.5rem;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    transition: border-color 0.2s, transform 0.2s;
}

.card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.card-number {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-light);
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}

.card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}

.card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* TOOLS */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
    margin-top: 3rem;
}

.tool-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.5rem;
}

.tool-name {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text);
}

.tool-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* REQUIREMENT */
.require {
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.require-box {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2.5rem;
    margin-top: 3rem;
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    flex-wrap: wrap;
}

.require-box .big-text {
    font-size: 3rem;
    font-weight: 900;
    color: var(--accent-light);
    line-height: 1;
    flex-shrink: 0;
}

.require-detail h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

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

/* PRICING */
.price-card {
    background: var(--surface);
    border: 1px solid var(--accent);
    border-radius: 16px;
    padding: 3rem;
    max-width: 480px;
    margin: 3rem auto 0;
    text-align: center;
}

.price-amount {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--text);
    letter-spacing: -2px;
    margin-bottom: 0.25rem;
}

.price-unit {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
}

.price-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 1rem 0 2rem;
}

.price-list {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
}

.price-list li {
    padding: 0.5rem 0;
    font-size: 0.9rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.price-list li:last-child {
    border-bottom: none;
}

.price-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent-light);
    border-radius: 50%;
    flex-shrink: 0;
}

/* CONTACT */
.contact-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3rem;
    max-width: 600px;
    margin: 3rem auto 0;
    text-align: center;
}

.contact-email {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-light);
    margin: 1rem 0;
    word-break: break-all;
}

.contact-note {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 2rem;
}

/* FOOTER */
footer {
    background: var(--surface2);
    border-top: 1px solid var(--border);
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* RESPONSIVE */
@media (max-width: 600px) {
    nav {
        padding: 0.875rem 1.25rem;
    }

    .hero {
        padding: 7rem 1.25rem 5rem;
    }

    section {
        padding: 4rem 1.25rem;
    }

    .require-box {
        padding: 1.75rem;
    }

    .price-card,
    .contact-box {
        padding: 2rem 1.5rem;
    }
}