.calligraphy-hero {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(circle at top left, rgba(185, 28, 28, 0.16), transparent 35%),
        radial-gradient(circle at bottom right, rgba(71, 85, 105, 0.16), transparent 30%),
        linear-gradient(135deg, rgba(255, 251, 245, 0.98), rgba(250, 245, 236, 0.94));
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 28px;
    box-shadow: 0 24px 48px rgba(15, 23, 42, 0.08);
}

.dark .calligraphy-hero {
    background:
        radial-gradient(circle at top left, rgba(220, 38, 38, 0.22), transparent 32%),
        radial-gradient(circle at bottom right, rgba(148, 163, 184, 0.16), transparent 28%),
        linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(30, 41, 59, 0.9));
    border-color: rgba(148, 163, 184, 0.16);
    box-shadow: 0 24px 48px rgba(2, 6, 23, 0.34);
}

.calligraphy-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 9999px;
    border: 1px solid rgba(148, 163, 184, 0.2);
    background: rgba(255, 255, 255, 0.82);
    color: #475569;
    font-size: 13px;
    font-weight: 600;
}

.dark .calligraphy-chip {
    background: rgba(15, 23, 42, 0.78);
    border-color: rgba(148, 163, 184, 0.16);
    color: #cbd5e1;
}

.calligraphy-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.calligraphy-nav__link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 9999px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(255, 255, 255, 0.72);
    color: #334155;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.18s ease;
}

.calligraphy-nav__link:hover,
.calligraphy-nav__link[aria-current="page"] {
    border-color: rgba(185, 28, 28, 0.28);
    background: rgba(185, 28, 28, 0.08);
    color: #991b1b;
}

.dark .calligraphy-nav__link {
    background: rgba(15, 23, 42, 0.78);
    border-color: rgba(148, 163, 184, 0.16);
    color: #cbd5e1;
}

.dark .calligraphy-nav__link:hover,
.dark .calligraphy-nav__link[aria-current="page"] {
    background: rgba(220, 38, 38, 0.16);
    color: #fecaca;
    border-color: rgba(248, 113, 113, 0.24);
}

.module-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #b91c1c;
}

.dark .module-kicker {
    color: #fca5a5;
}

.calligraphy-stat-card,
.result-entry,
.helper-card {
    border-radius: 18px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(255, 255, 255, 0.76);
}

.dark .calligraphy-stat-card,
.dark .result-entry,
.dark .helper-card {
    background: rgba(15, 23, 42, 0.62);
    border-color: rgba(148, 163, 184, 0.12);
}

.preview-shell {
    min-height: 240px;
    border-radius: 22px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: linear-gradient(135deg, rgba(255, 251, 245, 0.92), rgba(249, 244, 235, 0.96));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.dark .preview-shell {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.84), rgba(15, 23, 42, 0.9));
    border-color: rgba(148, 163, 184, 0.14);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.brush-preview {
    font-family: "STKaiti", "KaiTi", "Noto Serif SC", "Songti SC", serif;
    font-size: 20px;
    line-height: 1.9;
    color: #111827;
    white-space: pre-wrap;
    min-height: 180px;
}

.dark .brush-preview {
    color: #f8fafc;
}

.brush-preview.is-vertical {
    writing-mode: vertical-rl;
    text-orientation: upright;
    max-height: 320px;
    overflow: auto;
}

.severity-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 9999px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.severity-badge[data-severity="strict"] {
    background: rgba(220, 38, 38, 0.12);
    color: #b91c1c;
}

.severity-badge[data-severity="warning"] {
    background: rgba(245, 158, 11, 0.14);
    color: #b45309;
}

.severity-badge[data-severity="info"] {
    background: rgba(37, 99, 235, 0.12);
    color: #1d4ed8;
}

.dark .severity-badge[data-severity="strict"] {
    background: rgba(220, 38, 38, 0.18);
    color: #fecaca;
}

.dark .severity-badge[data-severity="warning"] {
    background: rgba(245, 158, 11, 0.18);
    color: #fde68a;
}

.dark .severity-badge[data-severity="info"] {
    background: rgba(37, 99, 235, 0.18);
    color: #bfdbfe;
}

.style-pill,
.theme-pill,
.format-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 14px;
    border-radius: 9999px;
    border: 1px solid rgba(148, 163, 184, 0.2);
    background: rgba(255, 255, 255, 0.88);
    color: #334155;
    font-size: 13px;
    font-weight: 600;
    transition: all 0.18s ease;
}

.style-pill:hover,
.theme-pill:hover,
.format-pill:hover,
.style-pill.is-active {
    border-color: rgba(185, 28, 28, 0.28);
    background: rgba(185, 28, 28, 0.08);
    color: #991b1b;
}

.dark .style-pill,
.dark .theme-pill,
.dark .format-pill {
    background: rgba(15, 23, 42, 0.8);
    border-color: rgba(148, 163, 184, 0.16);
    color: #cbd5e1;
}

.dark .style-pill:hover,
.dark .theme-pill:hover,
.dark .format-pill:hover,
.dark .style-pill.is-active {
    background: rgba(220, 38, 38, 0.16);
    color: #fecaca;
    border-color: rgba(248, 113, 113, 0.24);
}

.knowledge-details {
    border-radius: 18px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(255, 255, 255, 0.76);
}

.dark .knowledge-details {
    background: rgba(15, 23, 42, 0.62);
    border-color: rgba(148, 163, 184, 0.12);
}

.knowledge-details summary {
    list-style: none;
    cursor: pointer;
}

.knowledge-details summary::-webkit-details-marker {
    display: none;
}

.copy-link {
    color: #b91c1c;
    font-size: 13px;
    font-weight: 700;
}

.dark .copy-link {
    color: #fecaca;
}

.module-grid {
    display: grid;
    gap: 24px;
}

.module-card {
    border-radius: 24px;
    border: 1px solid rgba(148, 163, 184, 0.18);
    background: rgba(255, 255, 255, 0.82);
    padding: 24px;
    box-shadow: 0 18px 36px rgba(15, 23, 42, 0.06);
}

.dark .module-card {
    background: rgba(15, 23, 42, 0.68);
    border-color: rgba(148, 163, 184, 0.12);
    box-shadow: 0 18px 36px rgba(2, 6, 23, 0.24);
}

.module-card__icon {
    width: 48px;
    height: 48px;
    border-radius: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(185, 28, 28, 0.12);
    color: #991b1b;
    font-size: 18px;
}

.dark .module-card__icon {
    background: rgba(220, 38, 38, 0.18);
    color: #fecaca;
}

.module-card__list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    color: #64748b;
    font-size: 14px;
    line-height: 1.7;
}

.dark .module-card__list {
    color: #94a3b8;
}

.summary-grid {
    display: grid;
    gap: 24px;
}

.scroll-region {
    max-height: 560px;
    overflow: auto;
    padding-right: 6px;
}

.scroll-region::-webkit-scrollbar {
    width: 8px;
}

.scroll-region::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.45);
    border-radius: 9999px;
}

@media (min-width: 1024px) {
    .module-grid {
        grid-template-columns: minmax(0, 1fr) 340px;
        align-items: start;
    }

    .summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}