:root {
    --bg-dark-1: #1a1a2e;
    --bg-dark-2: #16213e;
    --bg-dark-3: #0f3460;
    --text-on-dark: #e8f7ff;
    --muted-on-dark: #b9c9d9;
    --panel-bg: rgba(255, 255, 255, 0.05);
    --panel-strong: rgba(8, 18, 34, 0.8);
    --panel-border: rgba(255, 255, 255, 0.1);
    --accent: #00d4ff;
    --accent-strong: #80ebff;
    --shadow: 0 24px 56px rgba(0, 0, 0, 0.28);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background:
        radial-gradient(circle at top right, rgba(0, 212, 255, 0.14), transparent 28%),
        radial-gradient(circle at top left, rgba(128, 235, 255, 0.08), transparent 22%),
        linear-gradient(135deg, var(--bg-dark-1) 0%, var(--bg-dark-2) 50%, var(--bg-dark-3) 100%);
    color: var(--text-on-dark);
    line-height: 1.7;
}

a {
    color: var(--accent-strong);
}

.shell {
    max-width: 1160px;
    margin: 0 auto;
    padding: 28px 20px 72px;
}

.shell.is-narrow {
    max-width: 980px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    margin-bottom: 34px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-logo {
    width: 42px;
    height: 42px;
    object-fit: contain;
    border-radius: 8px;
    filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.25));
}

.brand-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent-strong);
    letter-spacing: 0.02em;
}

.nav {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.nav a {
    color: var(--text-on-dark);
    text-decoration: none;
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.nav a:hover {
    color: var(--accent-strong);
}

.btn,
.nav .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 18px;
    border-radius: 999px;
    border: 1px solid rgba(0, 212, 255, 0.35);
    background: rgba(0, 212, 255, 0.08);
}

.hero {
    margin-bottom: 28px;
}

.hero-main,
.hero-panel,
.section-card,
.card {
    border: 1px solid var(--panel-border);
    border-radius: 22px;
    background:
        linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(255, 255, 255, 0.02)),
        var(--panel-strong);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.hero-main,
.hero-panel {
    padding: 36px;
    text-align: center;
}

.section-card,
.card {
    padding: 30px;
}

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

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

.eyebrow {
    display: inline-block;
    margin-bottom: 14px;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(0, 212, 255, 0.12);
    border: 1px solid rgba(0, 212, 255, 0.2);
    color: var(--accent-strong);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.15;
    color: #f7fbff;
}

h1 {
    font-size: clamp(2.4rem, 5vw, 4rem);
    margin-bottom: 16px;
}

h2 {
    margin-bottom: 16px;
    font-size: 1.6rem;
}

h3 {
    margin: 24px 0 10px;
    font-size: 1.05rem;
}

p,
ul,
ol {
    margin: 0 0 16px;
    color: var(--muted-on-dark);
}

ul,
ol {
    padding-left: 20px;
}

li + li {
    margin-top: 8px;
}

.hero-main p,
.hero-panel p {
    max-width: 48rem;
    margin-left: auto;
    margin-right: auto;
}

.meta {
    color: #9fb3c8;
    font-size: 0.95rem;
}

.notice {
    padding: 18px 20px;
    margin: 0 0 28px;
    border-left: 4px solid var(--accent);
    border-radius: 14px;
    background: rgba(0, 212, 255, 0.1);
    color: var(--text-on-dark);
}

.bullet-list {
    padding-left: 0;
    list-style-position: inside;
    text-align: center;
}

.system-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-top: 20px;
}

.system-item {
    padding: 18px;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.system-item strong {
    display: block;
    margin-bottom: 8px;
    color: #f7fbff;
}

.system-item span {
    color: var(--muted-on-dark);
}

.contact-label {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent-strong);
}

.contact-value {
    margin-top: 10px;
    font-size: 1.3rem;
    font-weight: 700;
}

.contact-note {
    margin-top: 10px;
}

.legal-copy h2:not(:first-child) {
    margin-top: 30px;
}

.legal-copy h3 {
    color: #d9f8ff;
}

.footer {
    margin-top: 32px;
    padding-top: 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 18px;
    color: #8ca1b6;
    font-size: 0.94rem;
}

.footer-links {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.footer-links a {
    text-decoration: none;
}

@media (max-width: 900px) {
    .split-grid,
    .system-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .shell {
        padding-top: 20px;
    }

    .topbar,
    .footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero-main,
    .hero-panel,
    .section-card,
    .card {
        padding: 24px;
    }
}