:root {
    --bg: #0a0d14;
    --bg-soft: #121826;
    --card: rgba(255, 255, 255, 0.08);
    --card-border: rgba(255, 255, 255, 0.14);
    --text: #f4f7fb;
    --muted: rgba(244, 247, 251, 0.72);
    --line: rgba(255, 255, 255, 0.08);
    --primary: #7c8cff;
    --primary-2: #9e7bff;
    --white: #ffffff;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 14px;
    --container: 1240px;
    --header-h: 78px;
    --transition: 0.55s cubic-bezier(.22, 1, .36, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Pretendard", "Noto Sans KR", Arial, sans-serif;
    background: linear-gradient(180deg, #07090f 0%, #0b1018 100%);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

button {
    font: inherit;
}

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

.landing-container {
    width: 100%;
    max-width: calc(var(--container) + 40px);
    margin: 0 auto;
    padding: 0 20px;
}

.landing-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 50;
    backdrop-filter: blur(16px);
    background: rgba(10, 13, 20, 0.45);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: transform .35s ease, background .35s ease;
}

.landing-header.is-hidden {
    transform: translateY(-100%);
}

.landing-header__inner {
    max-width: calc(var(--container) + 40px);
    min-height: var(--header-h);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.landing-logo {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.landing-nav {
    display: flex;
    gap: 26px;
}

.landing-nav a {
    color: var(--muted);
    font-size: 14px;
    transition: color .25s ease;
}

.landing-nav a:hover {
    color: var(--white);
}

.landing-main {
    width: 100%;
}

.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: var(--header-h);
}

.hero-section__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(124, 140, 255, 0.28), transparent 28%),
        radial-gradient(circle at 80% 30%, rgba(158, 123, 255, 0.18), transparent 24%),
        radial-gradient(circle at 60% 80%, rgba(37, 211, 182, 0.12), transparent 18%),
        linear-gradient(135deg, #0a0d14 0%, #11192a 100%);
    transform: scale(1.04);
}

.hero-section__overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(to bottom, rgba(0,0,0,0.08), rgba(0,0,0,0.25)),
        linear-gradient(to right, rgba(6,8,12,0.3), rgba(6,8,12,0.08));
}

.hero-section__content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
    padding-top: 60px;
    padding-bottom: 80px;
}

.hero-copy__eyebrow,
.section-head__eyebrow {
    display: inline-block;
    margin-bottom: 14px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: #b7c0ff;
    text-transform: uppercase;
}

.hero-copy__title {
    font-size: clamp(42px, 6vw, 78px);
    line-height: 1.04;
    letter-spacing: -0.045em;
    font-weight: 900;
    margin-bottom: 18px;
}

.hero-copy__desc {
    max-width: 680px;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.9;
    margin-bottom: 28px;
}

.hero-copy__cta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.hero-panel {
    display: grid;
    gap: 18px;
}

.hero-panel__card {
    padding: 28px;
    border: 1px solid var(--card-border);
    background: linear-gradient(180deg, rgba(255,255,255,0.09), rgba(255,255,255,0.05));
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(16px);
}

.hero-panel__card strong {
    display: block;
    font-size: 24px;
    line-height: 1.4;
    letter-spacing: -0.03em;
}

.hero-panel__label,
.site-entry__badge {
    display: inline-block;
    margin-bottom: 14px;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,0.1);
    color: #d7dcff;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.hero-panel__card--top {
    transform: translateX(-18px);
}

.hero-panel__card--bottom {
    transform: translateX(18px);
}

.scroll-indicator {
    position: absolute;
    left: 50%;
    bottom: 28px;
    transform: translateX(-50%);
    width: 28px;
    height: 50px;
    border: 1px solid rgba(255,255,255,0.35);
    border-radius: 999px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
    z-index: 3;
}

.scroll-indicator span {
    width: 5px;
    height: 10px;
    border-radius: 999px;
    background: var(--white);
    animation: scrollDot 1.8s infinite;
}

@keyframes scrollDot {
    0% { transform: translateY(0); opacity: 1; }
    70% { transform: translateY(16px); opacity: 0; }
    100% { transform: translateY(0); opacity: 0; }
}

.section-head {
    margin-bottom: 36px;
}

.section-head__title {
    font-size: clamp(28px, 4vw, 46px);
    line-height: 1.16;
    letter-spacing: -0.04em;
    margin-bottom: 12px;
}

.section-head__desc {
    max-width: 760px;
    color: var(--muted);
    font-size: 17px;
}

.intro-section,
.sites-section,
.feature-section,
.cta-section {
    position: relative;
    padding: 120px 0;
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.intro-card,
.site-entry,
.feature-bento__item,
.cta-box {
    border: 1px solid var(--card-border);
    background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.05));
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.intro-card {
    padding: 28px;
}

.intro-card__number {
    display: inline-flex;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    background: rgba(124, 140, 255, 0.16);
    color: #dbe0ff;
    font-weight: 800;
    margin-bottom: 20px;
}

.intro-card h3,
.site-entry h3,
.feature-bento__item h3 {
    font-size: 24px;
    margin-bottom: 12px;
    letter-spacing: -0.03em;
}

.intro-card p,
.site-entry p,
.feature-bento__item p {
    color: var(--muted);
}

.sites-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.site-entry {
    padding: 32px;
}

.site-entry__top {
    margin-bottom: 24px;
}

.site-entry__list {
    display: grid;
    gap: 10px;
    margin-bottom: 26px;
}

.site-entry__list li {
    position: relative;
    padding-left: 18px;
    color: #edf1ff;
}

.site-entry__list li::before {
    content: "";
    position: absolute;
    top: 10px;
    left: 0;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
}

.feature-bento {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 20px;
}

.feature-bento__item {
    padding: 28px;
    min-height: 180px;
}

.feature-bento__item--large {
    grid-column: span 6;
    min-height: 240px;
}

.feature-bento__item:not(.feature-bento__item--large) {
    grid-column: span 3;
}

.cta-box {
    padding: 36px;
    display: flex;
    justify-content: space-between;
    gap: 24px;
    align-items: center;
}

.cta-box__buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 22px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 700;
    transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn--primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    color: var(--white);
    box-shadow: 0 14px 30px rgba(124, 140, 255, 0.22);
}

.btn--ghost {
    border: 1px solid rgba(255,255,255,0.18);
    color: var(--white);
    background: rgba(255,255,255,0.04);
}

.btn--ghost:hover {
    background: rgba(255,255,255,0.08);
}

.btn--full {
    width: 100%;
}

.landing-footer {
    padding: 34px 20px 50px;
    border-top: 1px solid var(--line);
    background: rgba(0, 0, 0, 0.14);
}

.landing-footer__inner {
    max-width: calc(var(--container) + 40px);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 30px;
    align-items: center;
}

.landing-footer__brand p {
    color: var(--muted);
    margin-top: 6px;
    font-size: 14px;
}

.landing-footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
}

.landing-footer__links a {
    color: var(--muted);
    font-size: 14px;
}

.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--transition), transform var(--transition);
    will-change: opacity, transform;
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

.reveal-up {
    transform: translateY(32px);
}

.reveal-left {
    transform: translateX(-32px);
}

.reveal-right {
    transform: translateX(32px);
}

.reveal-scale {
    transform: scale(.94);
}

.delay-1 { transition-delay: .08s; }
.delay-2 { transition-delay: .16s; }
.delay-3 { transition-delay: .24s; }
.delay-4 { transition-delay: .32s; }
.delay-5 { transition-delay: .4s; }

@media (max-width: 1100px) {
    .hero-section__content {
        grid-template-columns: 1fr;
        gap: 26px;
    }

    .hero-panel__card--top,
    .hero-panel__card--bottom {
        transform: none;
    }

    .feature-bento__item--large,
    .feature-bento__item:not(.feature-bento__item--large) {
        grid-column: span 6;
    }

    .cta-box {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 820px) {
    .landing-nav {
        display: none;
    }

    .intro-grid,
    .sites-grid {
        grid-template-columns: 1fr;
    }

    .feature-bento {
        grid-template-columns: 1fr;
    }

    .feature-bento__item--large,
    .feature-bento__item:not(.feature-bento__item--large) {
        grid-column: span 1;
    }

    .hero-copy__desc,
    .section-head__desc {
        font-size: 15px;
    }

    .intro-section,
    .sites-section,
    .feature-section,
    .cta-section {
        padding: 90px 0;
    }

    .landing-footer__inner {
        flex-direction: column;
        align-items: flex-start;
    }
}