:root {
    --bg: #070A14;
    --panel: rgba(255, 255, 255, 0.06);
    --panel-2: rgba(255, 255, 255, 0.09);
    --line: rgba(255, 255, 255, 0.12);
    --text: rgba(255, 255, 255, 0.92);
    --muted: rgba(255, 255, 255, 0.68);
    --accent: #4DA3FF;
    --accent2: #2EE6D6;
    --shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
    --radius: 18px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans KR", Arial, sans-serif;
    color: var(--text);
    background: radial-gradient(1200px 600px at 15% 15%, rgba(77, 163, 255, 0.25), transparent 60%),
        radial-gradient(900px 500px at 85% 35%, rgba(46, 230, 214, 0.20), transparent 55%),
        var(--bg);
    line-height: 1.6;
}

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

.container {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(7, 10, 20, 0.65);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: 0.3px;
}

.brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, rgba(77, 163, 255, 0.35), rgba(46, 230, 214, 0.25));
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.brand-name {
    font-size: 18px;
}

.nav {
    position: relative;
}

.nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--line);
    color: var(--text);
    border-radius: 12px;
    padding: 10px 12px;
    cursor: pointer;
}

.nav-list {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 18px;
    margin: 0;
    padding: 0;
}

.nav-list a {
    color: var(--muted);
    font-weight: 600;
    padding: 10px 10px;
    border-radius: 12px;
    transition: all .2s ease;
}

.nav-list a:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.06);
}

.nav-cta {
    color: #001018 !important;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    box-shadow: var(--shadow);
}

/* Hero */
.hero {
    position: relative;
    padding: 72px 0 40px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: -120px -120px auto -120px;
    height: 520px;
    background: radial-gradient(closest-side, rgba(77, 163, 255, 0.18), transparent 70%);
    filter: blur(0px);
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 26px;
    align-items: start;
}

.badge {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    font-weight: 700;
    color: var(--muted);
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    padding: 8px 12px;
    border-radius: 999px;
}

.hero h1 {
    margin: 14px 0 10px;
    font-size: clamp(34px, 4vw, 52px);
    line-height: 1.12;
    letter-spacing: -0.7px;
}

.grad {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.sub {
    color: var(--muted);
    font-size: 16px;
    max-width: 56ch;
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin-top: 18px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: 14px;
    border: 1px solid var(--line);
    font-weight: 800;
    cursor: pointer;
    transition: transform .15s ease, background .15s ease, color .15s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn.primary {
    color: #001018;
    border: none;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    box-shadow: var(--shadow);
}

.btn.ghost {
    color: var(--text);
    background: rgba(255, 255, 255, 0.04);
}

.btn.full {
    width: 100%;
}

.hero-metrics {
    margin-top: 22px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.metric {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--radius);
    padding: 12px 12px;
}

.metric-num {
    font-weight: 900;
    letter-spacing: -0.2px;
}

.metric-label {
    color: var(--muted);
    font-size: 13px;
}

/* Cards */
.hero-card {
    display: grid;
    gap: 12px;
}

.card {
    border: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
    border-radius: var(--radius);
    padding: 16px 16px;
    box-shadow: var(--shadow);
}

.card-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 900;
    margin-bottom: 10px;
}

.checklist {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 8px;
    color: var(--muted);
}

.checklist i {
    color: rgba(46, 230, 214, 0.95);
}

.stack {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    color: var(--muted);
    font-weight: 700;
    font-size: 13px;
}

.muted {
    color: var(--muted);
}

.small {
    font-size: 13px;
}

.mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.divider {
    height: 1px;
    background: var(--line);
    margin: 14px 0;
}

/* Sections */
.section {
    padding: 56px 0;
}

.section.alt {
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.section-head {
    margin-bottom: 18px;
}

.section-head h2 {
    margin: 0 0 8px;
    font-size: 24px;
    letter-spacing: -0.3px;
}

.section-sub {
    margin: 0;
    color: var(--muted);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-top: 18px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-top: 18px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-top: 18px;
}

.feature,
.service {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--radius);
    padding: 16px;
}

.feature-icon,
.service-icon {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.06);
    margin-bottom: 10px;
}

.feature h3,
.service h3 {
    margin: 0 0 6px;
}

.feature p,
.service p {
    margin: 0;
    color: var(--muted);
}

.benefit {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--radius);
    padding: 16px;
}

.benefit-icon {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.06);
    flex: 0 0 auto;
}

.benefit h3 {
    margin: 0 0 6px;
}

.benefit p {
    margin: 0;
    color: var(--muted);
}

/* Contact */
.contact-wrap {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 14px;
    margin-top: 18px;
}

.form {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--radius);
    padding: 18px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

label {
    color: var(--muted);
    font-weight: 800;
    font-size: 13px;
}

input,
textarea {
    border-radius: 14px;
    border: 1px solid var(--line);
    background: rgba(7, 10, 20, 0.55);
    padding: 12px 12px;
    color: var(--text);
    outline: none;
}

input:focus,
textarea:focus {
    border-color: rgba(77, 163, 255, 0.55);
}

.form-hint {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.contact-side .side-card {
    height: 100%;
}

.side-info p {
    margin: 8px 0;
    color: var(--muted);
}

/* Footer */
.footer {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 18px 0;
    background: rgba(0, 0, 0, 0.18);
}

.footer-inner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-meta {
    color: var(--muted);
    margin-top: 6px;
}

.footer-right {
    display: flex;
    flex-direction: column;
    gap: 6px;
    color: var(--muted);
}

/* Responsive */
@media (max-width: 980px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
        grid-template-columns: 1fr;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .contact-wrap {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .nav-toggle {
        display: inline-flex;
    }

    .nav-list {
        position: absolute;
        right: 0;
        top: 52px;
        width: 220px;
        flex-direction: column;
        align-items: stretch;
        padding: 10px;
        background: rgba(7, 10, 20, 0.92);
        border: 1px solid var(--line);
        border-radius: 16px;
        box-shadow: var(--shadow);
        display: none;
    }

    .nav-list.open {
        display: flex;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .hero-metrics {
        grid-template-columns: 1fr;
    }
}

.logo-x {
    font-weight: 900;
    font-size: 18px;
    letter-spacing: -1px;
    color: #001018;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    display: grid;
    place-items: center;
}