:root {
    --bg: #121214;
    --card: #1c1c21;
    --text: #ece8e1;
    --muted: #9a948b;
    --line: #2e2e36;
    --accent: #3dd68c;
    --accent-2: #7aefb0;
    --btn: #3dd68c;
    --on-btn: #062014;
    --ok: #8fbc8f;
    --danger: #e06c75;
    --radius: 14px;
    --on-accent: #062014;
}

* { box-sizing: border-box; }

html {
    scrollbar-gutter: stable;
    overflow-y: scroll;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100%;
    color-scheme: dark;
}

site-header {
    display: block;
    position: sticky;
    top: 0;
    z-index: 40;
    min-height: 53px;
    background: var(--card);
    border-bottom: 1px solid var(--line);
}

.lang-select {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    color: var(--muted);
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 4px 6px;
    cursor: pointer;
}

a { color: var(--accent); }
a:hover { color: var(--accent-2); }

h1 { font-size: 2rem; margin: 0 0 12px; }
h2 { font-size: 1.25rem; }

.muted { color: var(--muted); }
.section-title {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
    margin: 28px 0 12px;
}

.badge {
    display: inline-block;
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 999px;
    background: #2a281f;
    color: var(--accent);
}
.badge.ok { background: #1e2a1e; color: var(--ok); }

.btn, .btn-sm {
    display: inline-block;
    border: 0;
    background: var(--btn);
    color: var(--on-btn);
    text-decoration: none;
    border-radius: 10px;
    padding: 10px 16px;
    cursor: pointer;
    font: inherit;
}
.btn-sm { padding: 6px 10px; font-size: 0.9rem; }
.btn.ghost, .btn-sm.ghost {
    background: transparent;
    color: var(--btn);
    border: 1px solid var(--btn);
}
.btn.danger { background: var(--danger); }

.form-block {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 14px;
    margin: 12px 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.form-block label { display: flex; flex-direction: column; gap: 6px; font-size: 0.95rem; }
.form-block input,
.form-block select,
.form-block textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 10px 12px;
    font: inherit;
    background: #141416;
    color: var(--text);
}
.form-block textarea { min-height: 80px; }

.md { line-height: 1.55; }
.md img { display: block; max-width: 100%; height: auto; margin: 14px 0 20px; border-radius: 10px; }
.katex, .katex-display { color: var(--text); }

.crumb { color: var(--muted); font-size: 0.9rem; }
.empty { color: var(--muted); padding: 12px 0; }
.err { color: var(--danger); }
.note {
    background: #241f16;
    border: 1px solid #3d3526;
    border-radius: 10px;
    padding: 12px;
}
.preview {
    max-width: 220px;
    max-height: 140px;
    object-fit: cover;
    border-radius: 8px;
    margin-top: 8px;
    display: block;
}
.icon-btn {
    border: 0;
    background: transparent;
    cursor: pointer;
    font-size: 1rem;
    padding: 6px;
    color: var(--muted);
}

@media (max-width: 640px) {
    h1 { font-size: 1.6rem; }
}