:root {
    --bg: #07101c;
    --panel: rgba(15, 23, 42, 0.88);
    --panel-soft: rgba(15, 23, 42, 0.72);
    --border: rgba(148, 163, 184, 0.18);
    --text: #e5eefc;
    --muted: #a4b4c9;
    --accent: #5b9df7;
    --accent-soft: rgba(59, 130, 246, 0.16);
    --shadow: 0 18px 40px rgba(2, 6, 23, 0.28);
    --radius: 18px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text);
    background: radial-gradient(circle at top left, rgba(59, 130, 246, 0.12), transparent 22%),
                radial-gradient(circle at top right, rgba(20, 184, 166, 0.08), transparent 24%),
                linear-gradient(180deg, #050b14 0%, #08101a 100%);
}

body a {
    color: var(--text);
    text-decoration: none;
}

body a:hover {
    color: #ffffff;
}

.page-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1.25rem 2rem;
}

.page-container {
    width: min(100%, 980px);
    margin: 0 auto;
    flex: 1;
}

.site-header {
    position: relative;
    left: 50%;
    right: 50%;
    margin-left: -50vw;
    margin-right: -50vw;
    width: 100vw;
    max-width: 100vw;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1rem;
    min-height: 60px;
    padding: 0 1.5rem;
    background: rgba(8, 12, 20, 0.72);
    backdrop-filter: blur(14px);
    color: var(--text);
    box-shadow: none;
    border-bottom: 1px solid rgba(148, 163, 184, 0.12);
    margin-bottom: 1rem;
}

.site-brand {
    color: var(--text);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-decoration: none;
}

.site-nav {
    display: inline-flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem;
    font-size: 0.95rem;
}

.site-nav a {
    color: var(--muted);
    text-decoration: none;
    padding: 0.25rem 0.5rem;
    border-radius: 999px;
    transition: color 0.18s ease, background 0.18s ease, opacity 0.18s ease;
}

.site-nav a:hover {
    color: var(--text);
    background: rgba(59, 130, 246, 0.08);
    opacity: 0.95;
}

.page-header {
    text-align: center;
    margin: 0 auto 1.4rem;
    max-width: 820px;
}

.page-header h1 {
    margin: 0;
    font-size: clamp(2.2rem, 4vw, 3.4rem);
    letter-spacing: -0.04em;
    text-shadow: 0 2px 8px rgba(59, 130, 246, 0.15);
}

.page-header p {
    margin: 0.8rem auto 0;
    max-width: 640px;
    color: var(--muted);
    line-height: 1.75;
}

.page-header p {
    margin: 0.8rem auto 0;
    max-width: 640px;
    color: var(--muted);
    line-height: 1.75;
}

.lang-switcher {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    margin: 1.25rem auto 2rem;
    padding: 0.55rem 0.85rem;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.24);
    background: rgba(15, 23, 42, 0.88);
}

.lang-option {
    display: inline-flex;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    color: var(--muted);
    font-weight: 600;
}

.lang-option.active {
    color: var(--text);
    background: rgba(59, 130, 246, 0.12);
}

.lang-option:hover {
    color: #f8fbff;
}

.content-card {
    background: var(--panel);
    border: 1px solid rgba(148, 163, 184, 0.07);
    box-shadow: 0 10px 24px rgba(2, 6, 23, 0.16);
    border-radius: var(--radius);
    padding: 2rem;
}

.content-card h2,
.content-card h3 {
    color: #f8fbff;
}

.content-card h2 {
    margin-top: 1.7rem;
    font-size: 1.25rem;
}

.content-card h3 {
    margin-top: 1.35rem;
    font-size: 1.05rem;
}

.content-card p,
.content-card li {
    color: var(--text);
    line-height: 1.75;
    margin: 1rem 0 0;
}

.content-card ul {
    margin: 0.75rem 0 0 1.35rem;
    padding: 0;
}

.content-card li {
    list-style: disc;
}

.content-card .language-note {
    margin-top: 0.6rem;
    color: var(--muted);
    font-size: 0.95rem;
}

.hidden {
    display: none;
}

.site-footer {
    margin-top: 2.5rem;
    text-align: center;
    color: var(--muted);
    font-size: 0.95rem;
}

.footer-links {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    color: var(--muted);
}

.footer-link {
    color: var(--text);
}

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

.footer-text {
    margin-top: 0.55rem;
    color: var(--muted);
}

@media (max-width: 680px) {
    .page-shell {
        padding: 1rem 0.85rem 1.5rem;
    }
    .content-card {
        padding: 1.5rem;
    }
    .lang-switcher {
        width: 100%;
        justify-content: center;
        padding: 0.6rem 0.8rem;
    }
    .footer-links {
        gap: 0.35rem;
    }
}