:root {
    --primary: #1e3a5f;
    --accent: #f59e0b;
    --bg: #f3f4f6;
    --card: #ffffff;
    --text: #111827;
    --muted: #6b7280;
    --border: #e5e7eb;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.65;
}

.manual-header {
    background: linear-gradient(135deg, var(--primary) 0%, #2d4a6f 100%);
    color: #fff;
    padding: 2rem 1.5rem 2.5rem;
}

.manual-header-inner {
    max-width: 960px;
    margin: 0 auto;
}

.manual-header h1 {
    margin: 0 0 0.5rem;
    font-size: 1.75rem;
    font-weight: 700;
}

.manual-header p {
    margin: 0;
    opacity: 0.9;
    max-width: 42rem;
}

.lang-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.25rem;
}

.lang-bar a {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.85rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.35);
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.lang-bar a:hover {
    background: rgba(255, 255, 255, 0.2);
}

.lang-bar a.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #1f2937;
}

.manual-wrap {
    max-width: 960px;
    margin: -1.25rem auto 3rem;
    padding: 0 1.5rem;
}

.manual-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 1.5rem;
    align-items: start;
}

@media (max-width: 800px) {
    .manual-layout {
        grid-template-columns: 1fr;
    }

    .manual-toc {
        position: static !important;
    }
}

.manual-toc {
    position: sticky;
    top: 1rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.manual-toc h2 {
    margin: 0 0 0.75rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
}

.manual-toc ol {
    margin: 0;
    padding-left: 1.15rem;
    font-size: 0.875rem;
}

.manual-toc a {
    color: var(--primary);
    text-decoration: none;
}

.manual-toc a:hover {
    text-decoration: underline;
}

.manual-content section {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.5rem 1.75rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.manual-content h2 {
    margin: 0 0 1rem;
    font-size: 1.35rem;
    color: var(--primary);
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent);
}

.manual-content h3 {
    margin: 1.25rem 0 0.5rem;
    font-size: 1.05rem;
    color: #374151;
}

.manual-content p,
.manual-content li {
    font-size: 0.95rem;
}

.manual-content ul,
.manual-content ol {
    padding-left: 1.25rem;
}

.manual-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    margin: 1rem 0;
}

.manual-content th,
.manual-content td {
    border: 1px solid var(--border);
    padding: 0.55rem 0.75rem;
    text-align: left;
}

.manual-content th {
    background: #f9fafb;
    font-weight: 600;
}

.figure {
    margin: 1.25rem 0;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    overflow: hidden;
    background: #fafafa;
}

.figure img {
    display: block;
    width: 100%;
    height: auto;
}

.figure figcaption {
    padding: 0.6rem 0.85rem;
    font-size: 0.8rem;
    color: var(--muted);
    background: #fff;
    border-top: 1px solid var(--border);
}

.tip {
    background: #fffbeb;
    border-left: 4px solid var(--accent);
    padding: 0.85rem 1rem;
    margin: 1rem 0;
    border-radius: 0 0.5rem 0.5rem 0;
    font-size: 0.9rem;
}

.tip strong {
    color: #92400e;
}

.role-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    background: #e0e7ff;
    color: #3730a3;
}

.manual-footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--muted);
    font-size: 0.85rem;
}

/* Index (language picker) */
.picker-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: linear-gradient(160deg, #1e3a5f 0%, #2d4a6f 50%, #f3f4f6 50%);
}

.picker-card {
    background: var(--card);
    border-radius: 1rem;
    padding: 2.5rem 2rem;
    max-width: 420px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.picker-card h1 {
    margin: 0 0 0.5rem;
    font-size: 1.5rem;
    color: var(--primary);
}

.picker-card p {
    margin: 0 0 1.75rem;
    color: var(--muted);
    font-size: 0.95rem;
}

.picker-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.picker-links a {
    display: block;
    padding: 0.9rem 1.25rem;
    border-radius: 0.65rem;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.15s, box-shadow 0.15s;
}

.picker-links a.en {
    background: var(--primary);
    color: #fff;
}

.picker-links a.ms {
    background: var(--accent);
    color: #1f2937;
}

.picker-links a:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.picker-back {
    display: inline-block;
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--primary);
    text-decoration: none;
}

.picker-back:hover {
    text-decoration: underline;
}