:root {
    --green: #16a34a;
    --green-bg: #f0fdf4;
    --green-border: #bbf7d0;
    --red: #dc2626;
    --red-bg: #fef2f2;
    --red-border: #fecaca;
    --ink: #1f2937;
    --muted: #6b7280;
    --bg: #fafaf9;
    --card: #ffffff;
    --border: #e5e7eb;
    --accent: #dc143c;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.65;
    color: var(--ink);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

header {
    background: linear-gradient(135deg, #ffffff 0%, #fef2f2 100%);
    border-bottom: 4px solid var(--accent);
    padding: 4rem 1.5rem 3rem;
    text-align: center;
}

.lang-switch {
    display: inline-flex;
    gap: 0.5rem;
    margin-top: 1.5rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.lang-switch a,
.lang-switch span {
    text-decoration: none;
    color: var(--muted);
    padding: 0.4rem 0.9rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--card);
    transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.lang-switch a:hover,
.lang-switch a:focus {
    color: var(--accent);
    border-color: var(--accent);
}

.lang-switch .current {
    color: white;
    background: var(--accent);
    border-color: var(--accent);
    cursor: default;
}

.flag {
    display: inline-block;
    width: 48px;
    height: 32px;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
    background: linear-gradient(to bottom, #ffffff 50%, var(--accent) 50%);
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--ink);
    margin-bottom: 0.75rem;
}

.subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: var(--muted);
    font-weight: 500;
    max-width: 700px;
    margin: 0 auto;
}

main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

.intro {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem 2rem;
    margin-bottom: 3rem;
    color: var(--muted);
    font-size: 1rem;
}

.intro strong {
    color: var(--ink);
}

.intro a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid rgba(220, 20, 60, 0.3);
    transition: border-color 0.15s ease;
}

.intro a:hover,
.intro a:focus {
    border-bottom-color: var(--accent);
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.card-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    color: white;
}

.icon.allowed {
    background: var(--green);
}

.icon.forbidden {
    background: var(--red);
}

.card-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 0.25rem;
    line-height: 1.3;
}

.badge {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
}

.badge.allowed {
    background: var(--green-bg);
    color: var(--green);
    border: 1px solid var(--green-border);
}

.badge.forbidden {
    background: var(--red-bg);
    color: var(--red);
    border: 1px solid var(--red-border);
}

.card p {
    margin-bottom: 1rem;
}

.card p:last-child {
    margin-bottom: 0;
}

blockquote {
    border-left: 4px solid var(--accent);
    background: #faf9f7;
    padding: 1rem 1.25rem;
    margin: 1.25rem 0;
    font-style: italic;
    color: #374151;
    border-radius: 0 8px 8px 0;
}

blockquote cite {
    display: block;
    margin-top: 0.6rem;
    font-style: normal;
    font-size: 0.9rem;
    color: var(--muted);
}

blockquote cite a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

blockquote cite a:hover {
    text-decoration: underline;
}

code {
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.9em;
    background: #f3f4f6;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.1em 0.4em;
    color: #1f2937;
}

.section-heading {
    font-size: 1.05rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}

.section-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--ink);
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.section-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    font-size: 0.95rem;
    font-weight: 800;
    flex-shrink: 0;
}

.info {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin: 1.25rem 0;
    font-size: 0.95rem;
}

.info strong {
    color: #92400e;
}

.info a {
    color: #b45309;
    font-weight: 600;
}

footer {
    border-top: 1px solid var(--border);
    background: #f3f4f6;
    padding: 2.5rem 1.5rem;
    text-align: center;
    color: var(--muted);
    font-size: 0.9rem;
}

footer p {
    max-width: 680px;
    margin: 0 auto 0.5rem;
}

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

@media (max-width: 600px) {
    .card {
        padding: 1.5rem;
    }
    .card-header {
        gap: 0.75rem;
    }
    .icon {
        width: 36px;
        height: 36px;
        font-size: 20px;
    }
}