:root {
    --bg: #07111f;
    --bg-soft: #0d1b30;
    --surface: rgba(13, 27, 48, 0.72);
    --surface-strong: rgba(11, 22, 37, 0.94);
    --line: rgba(130, 176, 255, 0.16);
    --text: #e7eefb;
    --muted: #97a8c3;
    --accent: #63d2ff;
    --accent-strong: #2ca4ff;
    --success: #7cf5c5;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --font-display: "Space Grotesk", "Noto Sans JP", "Noto Sans KR", sans-serif;
    --font-body: "Noto Sans JP", "Noto Sans KR", sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    font-family: var(--font-body);
    background:
        radial-gradient(circle at top left, rgba(99, 210, 255, 0.22), transparent 32%),
        radial-gradient(circle at 85% 15%, rgba(44, 164, 255, 0.2), transparent 22%),
        linear-gradient(180deg, #050b14 0%, #07111f 45%, #0a1320 100%);
    min-height: 100vh;
}

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

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

.site-shell {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.site-shell::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
    background-size: 52px 52px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent);
    pointer-events: none;
}

.page-main {
    flex: 1;
    position: relative;
    z-index: 1;
}

.site-header,
.site-footer {
    position: relative;
    z-index: 2;
}

.site-container {
    padding-left: clamp(1rem, 3.2vw, 1.5rem);
    padding-right: clamp(1rem, 3.2vw, 1.5rem);
}

.site-header {
    padding-top: 0.85rem;
}

.site-navbar {
    min-height: 72px;
}

.navbar-brand,
.hero-title,
.section-heading h2,
.cta-panel h2,
.policy-card h1,
.card-panel h1,
.card-panel h2,
.app-hero h1 {
    font-family: var(--font-display);
}

.brand-mark {
    display: inline-flex;
    flex-direction: column;
    gap: 0.12rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--text);
}

.brand-mark small {
    color: var(--muted);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
}

.navbar-toggler {
    padding: 0.35rem 0.55rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(99, 210, 255, 0.18);
}

.navbar-toggler-icon {
    filter: invert(0.92);
}

.nav-link {
    color: var(--muted);
    padding: 0.45rem 0;
    transition: color 160ms ease;
}

.nav-link:hover,
.nav-link:focus,
.nav-link.is-active {
    color: var(--text);
}

.nav-link.is-active {
    text-shadow: 0 0 18px rgba(99, 210, 255, 0.15);
}

.nav-lang-item {
    margin-top: 0.5rem;
}

.lang-switcher {
    display: inline-flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.lang-pill {
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0.42rem 0.82rem;
    color: var(--muted);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    line-height: 1;
}

.lang-pill.is-active,
.lang-pill:hover {
    color: var(--text);
    background: rgba(99, 210, 255, 0.1);
    border-color: rgba(99, 210, 255, 0.35);
}

.page-wrap {
    padding: 1.25rem 0 4.5rem;
}

.page-stack {
    display: grid;
    gap: 1.5rem;
}

.section-space {
    padding: 5rem 0;
}

.section-soft {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0));
}

.section-heading {
    max-width: 760px;
    margin-bottom: 2rem;
}

.section-kicker {
    display: inline-block;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.75rem;
    margin-bottom: 0.9rem;
}

.section-heading h2,
.cta-panel h2,
.policy-card h1,
.card-panel h1 {
    font-size: clamp(2rem, 4vw, 3.8rem);
    line-height: 1;
    letter-spacing: -0.04em;
    margin-bottom: 1rem;
}

.card-panel h2,
.policy-card h2,
.app-hero h2 {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.section-heading p,
.card-panel p,
.policy-card p,
.hero-body,
.hero-note,
.footer-bar p,
.form-help,
.form-notice {
    color: var(--muted);
    line-height: 1.8;
}

.btn-cta {
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    border: 0;
    color: #06101b;
    border-radius: 999px;
    padding: 0.9rem 1.35rem;
    font-weight: 700;
    box-shadow: 0 10px 30px rgba(44, 164, 255, 0.25);
}

.btn-cta:hover,
.btn-cta:focus {
    color: #06101b;
    transform: translateY(-1px);
}

.footer-bar {
    display: flex;
    justify-content: space-between;
    gap: 1.5rem;
    align-items: center;
    padding: 1.5rem 0 2.75rem;
    color: var(--muted);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.text-link,
.back-link {
    color: var(--accent);
}

.card-panel,
.policy-card,
.solution-card,
.app-card,
.cta-panel,
.signal-panel {
    border: 1px solid var(--line);
    background: var(--surface);
    backdrop-filter: blur(18px);
    box-shadow: var(--shadow);
}

.cta-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    padding: 2rem 2.25rem;
    border-radius: var(--radius-xl);
}

.cta-panel p {
    margin: 0;
}

.subpage-body {
    background:
        radial-gradient(circle at top left, rgba(99, 210, 255, 0.18), transparent 26%),
        linear-gradient(180deg, #07111f 0%, #091424 100%);
}

.subpage-wrap {
    padding: 1.25rem 0 4.5rem;
}

.subpage-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.policy-card,
.card-panel {
    border-radius: var(--radius-xl);
    padding: 2rem;
}

.policy-section + .policy-section,
.stack-item + .stack-item {
    margin-top: 1.5rem;
}

.contact-list {
    list-style: none;
    padding: 0;
    margin: 1rem 0 0;
    color: var(--text);
}

.contact-list li + li {
    margin-top: 0.5rem;
}

.feature-list {
    padding-left: 1rem;
    color: var(--muted);
}

.feature-list li + li {
    margin-top: 0.5rem;
}

.form-label {
    color: var(--text);
}

.form-control {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(151, 168, 195, 0.2);
    color: var(--text);
    border-radius: 16px;
    padding: 0.85rem 1rem;
}

.form-control:focus {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    border-color: rgba(99, 210, 255, 0.5);
    box-shadow: 0 0 0 0.25rem rgba(99, 210, 255, 0.12);
}

.form-notice,
.form-help {
    margin-top: 1rem;
}

@media (min-width: 992px) {
    .nav-lang-item {
        margin-top: 0;
        margin-left: 0.5rem;
    }
}

@media (max-width: 991px) {
    .navbar-collapse {
        margin-top: 0.85rem;
        padding: 1rem 0 0.25rem;
        border-top: 1px solid var(--line);
    }

    .page-wrap,
    .subpage-wrap {
        padding-top: 1rem;
    }

    .footer-bar,
    .cta-panel,
    .subpage-head {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-bar {
        padding: 1.25rem 0 2.25rem;
        gap: 1rem;
    }

    .footer-bar > div,
    .footer-links {
        width: 100%;
    }

    .footer-links {
        gap: 0.75rem 1.25rem;
        justify-content: flex-start;
        align-items: flex-start;
    }

    .footer-links span {
        display: block;
        width: 100%;
        margin-top: 0.25rem;
        line-height: 1.7;
    }
}

@media (max-width: 575px) {
    .site-container {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .page-wrap,
    .subpage-wrap {
        padding-bottom: 3.5rem;
    }

    .policy-card,
    .card-panel,
    .cta-panel {
        padding: 1.5rem;
    }

    .footer-bar strong {
        display: inline-block;
        margin-bottom: 0.35rem;
        font-size: 1.1rem;
        line-height: 1.35;
    }

    .footer-bar p,
    .footer-links,
    .footer-links span {
        font-size: 0.95rem;
        line-height: 1.7;
    }
}