:root {
    --background: #ecf9f7;
    --background-soft: #f6fcfb;
    --background-deep: #dff3f0;
    --surface: rgba(255, 255, 255, 0.94);
    --surface-strong: #ffffff;
    --ink: #174644;
    --muted: #668f8e;
    --muted-soft: #96afaa;
    --accent: #7ec8c3;
    --accent-strong: #3f8f89;
    --accent-soft: rgba(126, 200, 195, 0.16);
    --border: rgba(23, 70, 68, 0.1);
    --shadow: 0 22px 56px rgba(36, 97, 94, 0.12);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.94), transparent 28%),
        radial-gradient(circle at top right, rgba(126, 200, 195, 0.24), transparent 24%),
        linear-gradient(160deg, var(--background) 0%, var(--background-soft) 48%, var(--background-deep) 100%);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

code {
    font-family: "SFMono-Regular", SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.95em;
}

.page-shell {
    width: min(920px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 2rem 0 4rem;
}

.site-nav {
    display: flex;
    justify-content: center;
    margin: 0 0 1.25rem;
    animation: rise 360ms ease-out both;
}

.site-nav-inner {
    display: inline-flex;
    gap: 0.5rem;
    padding: 0.45rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.78);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}

.site-nav a {
    padding: 0.7rem 1rem;
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    transition: background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.site-nav a:hover {
    background: rgba(126, 200, 195, 0.14);
    color: var(--accent-strong);
    transform: translateY(-1px);
}

.site-nav a[aria-current="page"] {
    background: var(--accent-soft);
    color: var(--accent-strong);
}

.hero {
    padding: 0 0 1.5rem;
    animation: rise 480ms ease-out both;
}

.hero-panel {
    position: relative;
    overflow: hidden;
    padding: clamp(1.6rem, 4vw, 2.75rem);
    border: 1px solid var(--border);
    border-radius: 30px;
    background:
        radial-gradient(circle at top right, rgba(126, 200, 195, 0.24), transparent 32%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(249, 255, 254, 0.92));
    box-shadow: var(--shadow);
}

.brand-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin: 0 0 1rem;
    padding: 0.52rem 0.9rem;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent-strong);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.brand-chip::before {
    width: 0.58rem;
    height: 0.58rem;
    border-radius: 999px;
    background: var(--accent);
    content: "";
}

.hero h1 {
    margin: 0;
    font-size: clamp(2.3rem, 5vw, 4.1rem);
    line-height: 0.98;
    letter-spacing: -0.04em;
}

.lede {
    max-width: 38rem;
    margin: 1.25rem 0 0;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.72;
}

.hero-meta {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

.hero-meta span {
    padding: 0.6rem 0.86rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.8);
    color: var(--muted);
    font-size: 0.92rem;
}

.policy-card {
    padding: clamp(1.5rem, 4vw, 3rem);
    border: 1px solid var(--border);
    border-radius: 28px;
    background: linear-gradient(180deg, var(--surface-strong), var(--surface));
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
    animation: rise 620ms ease-out both;
}

.error-card {
    padding: 1.1rem 1.2rem;
    border: 1px solid rgba(63, 143, 137, 0.22);
    border-radius: 18px;
    background: var(--accent-soft);
}

.error-card h2 {
    margin: 0 0 0.55rem;
    color: var(--ink);
    font-size: 1.2rem;
}

.error-card p {
    margin: 0;
}

.markdown-body {
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.76;
}

.markdown-body > :first-child {
    margin-top: 0;
}

.markdown-body > :last-child {
    margin-bottom: 0;
}

.markdown-body > * + * {
    margin-top: 1.1rem;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
    color: var(--ink);
    line-height: 1.2;
    letter-spacing: -0.03em;
    font-weight: 700;
}

.markdown-body h1 {
    font-size: clamp(1.7rem, 3vw, 2.4rem);
}

.markdown-body h2 {
    margin-top: 2.2rem;
    padding-top: 1.8rem;
    border-top: 1px solid var(--border);
    font-size: clamp(1.25rem, 2vw, 1.65rem);
}

.markdown-body h3 {
    margin-top: 1.8rem;
    font-size: 1.12rem;
}

.markdown-body p,
.markdown-body li,
.markdown-body blockquote {
    max-width: 48rem;
}

.markdown-body a {
    color: var(--accent-strong);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.16em;
}

.markdown-body ul,
.markdown-body ol {
    padding-left: 1.4rem;
}

.markdown-body li + li {
    margin-top: 0.35rem;
}

.markdown-body hr {
    margin: 2rem 0;
    border: 0;
    border-top: 1px solid var(--border);
}

.markdown-body blockquote {
    margin-left: 0;
    padding: 0.9rem 1rem;
    border-left: 4px solid var(--accent);
    border-radius: 0 16px 16px 0;
    background: var(--accent-soft);
    color: var(--ink);
}

.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.4rem 0;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.92);
}

.markdown-body thead {
    background: rgba(126, 200, 195, 0.15);
}

.markdown-body th,
.markdown-body td {
    padding: 0.85rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.markdown-body tr:last-child td {
    border-bottom: 0;
}

.markdown-body :not(pre) > code {
    padding: 0.15rem 0.38rem;
    border-radius: 8px;
    background: rgba(23, 70, 68, 0.08);
}

.markdown-body pre {
    overflow-x: auto;
    padding: 1rem 1.1rem;
    border-radius: 18px;
    background: #174644;
    color: #f5fbfa;
}

.markdown-body pre code {
    background: transparent;
    padding: 0;
}

@keyframes rise {
    from {
        opacity: 0;
        transform: translateY(18px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 720px) {
    .page-shell {
        width: min(100% - 1rem, 920px);
        padding-top: 1rem;
    }

    .site-nav {
        justify-content: stretch;
    }

    .site-nav-inner {
        width: 100%;
        justify-content: center;
    }

    .site-nav a {
        flex: 1 1 0;
        text-align: center;
    }

    .hero-panel,
    .policy-card {
        border-radius: 24px;
    }

    .hero-meta {
        gap: 0.55rem;
    }

    .hero-meta span {
        width: 100%;
        font-size: 0.86rem;
    }

    .markdown-body table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}