:root {
    --bg: #f6f8fb;
    --panel: #ffffff;
    --panel-soft: #f7f9fc;
    --text: #333;
    --muted: #6b7280;
    --border: #e6ebf2;
    --shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    --primary: #1d4ed8;
}

* {
    box-sizing: border-box;
}

html,
body {
    max-width: 100%;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    margin: 0;
    padding: 24px;
    background: var(--bg);
    color: var(--text);
}

.doc-shell {
    max-width: 1400px;
    margin: 0 auto;
}

.doc-header {
    background: var(--panel);
    border-radius: 14px;
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.doc-body {
    background: var(--panel);
    border-radius: 14px;
    padding: 32px;
    box-shadow: var(--shadow);
}

.prose {
    max-width: 1400px;
    margin: 0 auto;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
    margin-top: 1.5em;
    margin-bottom: 0.55em;
    line-height: 1.2;
}

.prose h1 {
    font-size: clamp(2rem, 4vw, 2.6rem);
    margin-top: 0;
}

.prose h2 {
    font-size: 1.6rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
}

.prose h3 {
    font-size: 1.25rem;
}

.prose p,
.prose li {
    line-height: 1.65;
    color: var(--text);
}

.prose ul,
.prose ol {
    padding-left: 1.4rem;
    margin: 0.6rem 0 1rem;
}

.prose hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 1.5rem 0;
}

.prose blockquote {
    margin: 1rem 0;
    padding: 1rem 1.25rem;
    border-left: 4px solid var(--primary);
    background: #eff6ff;
    color: #1e40af;
    border-radius: 0 10px 10px 0;
    font-weight: 500;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.spec-card {
    background: var(--panel-soft);
    border: 1px solid var(--border);
    padding: 18px;
    border-radius: 10px;
}

.spec-card h4 {
    margin: 0 0 6px 0;
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--muted);
    letter-spacing: 0.04em;
}

.spec-card p {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
}

.cta-container {
    margin: 36px 0 20px 0;
    background: #eef8f2;
    border: 1px solid #dcefe2;
    padding: 24px;
    border-radius: 12px;
    text-align: center;
}

.cta-button {
    display: inline-block;
    background: #166534;
    color: #fff;
    text-decoration: none;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.05rem;
    margin-top: 12px;
    transition: 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.cta-button:hover {
    background: #14532d;
    transform: translateY(-1px);
}

@media (max-width: 640px) {
    body {
        padding: 14px;
    }

    .doc-header,
    .doc-body {
        padding: 18px;
        border-radius: 12px;
    }
}

.top-links {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.doc-link-button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    padding: 9px 14px;
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 600;
    line-height: 1;
    border: 1px solid #dbe7f5;
    background: #f6f0ff;
    color: #4b5563;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
    transition: 0.18s ease;
}

.doc-link-button:hover {
    background: #efe4ff;
    border-color: #cbb7f6;
    color: #1f2937;
    transform: translateY(-1px);
}

.doc-link-button.is-current {
    background: #e8f0ff;
    border-color: #bfd3fb;
    color: #1d4ed8;
}

.footer-text {
    color: var(--text);
    font-size: 1rem;
    margin: 20px 0 20px 0;
    line-height: 1.6;
}