:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #172033;
  --color-muted: #647084;
  --color-border: #d9e0ea;
  --color-primary: #3657d8;
  --color-primary-hover: #2544b8;
  --color-accent: #0f766e;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgb(15 23 42 / 0.06);
  --shadow-md: 0 14px 36px rgb(15 23 42 / 0.10);
}
[data-theme="dark"] {
  --color-bg: #111827;
  --color-surface: #182235;
  --color-text: #edf2f7;
  --color-muted: #a7b1c2;
  --color-border: #304057;
  --color-primary: #8aa2ff;
  --color-primary-hover: #b1c0ff;
  --color-accent: #4dd1c1;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--color-text); background: var(--color-bg); font: 16px/1.55 Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--color-primary); }
code, pre, textarea, input { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.sr-only, .skip-link:not(:focus) { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.skip-link:focus { position: fixed; top: 12px; left: 12px; z-index: 20; background: var(--color-surface); padding: 8px 10px; border: 1px solid var(--color-border); }
.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--color-bg) 92%, transparent); backdrop-filter: blur(14px); border-bottom: 1px solid var(--color-border); }
.nav { max-width: 1180px; margin: 0 auto; padding: 14px 20px; display: flex; align-items: center; gap: 18px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border: 1px solid var(--color-border); border-radius: var(--radius-md); color: var(--color-primary); background: var(--color-surface); }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 14px; font-size: 14px; }
.nav-toggle { display: none; }
.icon-btn, button, .btn { border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); color: var(--color-text); padding: 9px 12px; cursor: pointer; }
button:hover, .btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn.primary, .hero-search button, .lookup-form button, .filters button { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.btn.primary:hover, .hero-search button:hover { background: var(--color-primary-hover); color: #fff; }
.hero { min-height: 560px; display: flex; align-items: center; border-bottom: 1px solid var(--color-border); }
.hero-inner, .section, .page-head, .directory, .tool-page, .article, .lookup-form, .char-results, .character-detail, .table-filters, .unicode-grid, .pager { max-width: 1180px; margin: 0 auto; padding: 38px 20px; width: 100%; }
.hero h1 { max-width: 760px; margin: 0 0 12px; font-size: clamp(42px, 7vw, 76px); line-height: 1.02; letter-spacing: 0; }
.hero p, .page-head p, .lede { color: var(--color-muted); max-width: 760px; font-size: 20px; }
.hero-search { max-width: 780px; display: flex; gap: 10px; margin: 28px 0 12px; }
input, textarea, select { width: 100%; border: 1px solid var(--color-border); background: var(--color-surface); color: var(--color-text); border-radius: var(--radius-md); padding: 12px; }
textarea { min-height: 270px; resize: vertical; }
input:focus, textarea:focus, select:focus, button:focus, a:focus { outline: 3px solid color-mix(in srgb, var(--color-primary) 35%, transparent); outline-offset: 2px; }
.examples, .actions, .card-meta, .tabs, .tool-actions, .pager { display: flex; flex-wrap: wrap; gap: 10px; }
.actions { margin-top: 10px; }
.examples a, .badge, .card-meta span { color: var(--color-muted); border: 1px solid var(--color-border); border-radius: 999px; padding: 5px 9px; font-size: 13px; }
.badge.local { color: #056650; border-color: #7dd3c7; background: #effcf9; text-align: center; }
[data-theme="dark"] .badge.local { background: #123c37; color: #8ff1e2; }
.badge.server { color: #7c2d12; background: #fff7ed; text-align: center; display: inline-flex; align-items: center; justify-content: center; }
.section > h2, .section-head h2, .page-head h1 { margin-top: 0; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.card-grid, .category-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.tool-card, .category-card, .guide-list article { border: 1px solid var(--color-border); background: var(--color-surface); border-radius: var(--radius-md); padding: 18px; box-shadow: var(--shadow-sm); }
.tool-card h2, .category-card h2, .guide-list h2 { margin: 10px 0 8px; font-size: 19px; }
.tool-card p, .category-card p, .muted { color: var(--color-muted); }
.card-icon { width: 36px; height: 36px; border-radius: var(--radius-md); display: grid; place-items: center; color: var(--color-primary); border: 1px solid var(--color-border); }
.quick-tool .tabs button.active { color: #fff; background: var(--color-primary); border-color: var(--color-primary); }
.io-grid, .tool-shell, .text-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.quick-tool .io-grid { margin-top: 10px; }
.panel { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 14px; }
.panel label { display: block; font-weight: 700; margin-bottom: 8px; }
.tool-title { display: flex; align-items: start; justify-content: space-between; gap: 16px; }
.tool-title h1 { margin-bottom: 8px; }
.status, .meta-output { color: var(--color-muted); font-size: 14px; margin-top: 8px; white-space: pre-wrap; }
.filters { display: grid; grid-template-columns: 2fr 1fr auto 1fr; gap: 12px; align-items: end; margin-bottom: 18px; }
.link-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.link-grid a { border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); padding: 14px; }
.guide-list { max-width: 900px; margin: 0 auto; padding: 20px; display: grid; gap: 14px; }
.article { max-width: 860px; }
.article h1 { font-size: 44px; line-height: 1.08; }
.article p, .article li { max-width: 76ch; }
.article pre { max-width: 100%; overflow: auto; background: var(--color-surface); border: 1px solid var(--color-border); padding: 14px; border-radius: var(--radius-md); }
.article-wide { width: min(1100px, calc(100vw - 2rem)); margin-inline: calc((min(860px, 100vw - 40px) - min(1100px, calc(100vw - 2rem))) / 2); max-width: none; }
.toc { display: flex; gap: 10px; flex-wrap: wrap; margin: 18px 0; }
.toc a { border: 1px solid var(--color-border); padding: 7px 9px; border-radius: var(--radius-sm); }
.direct-answer, .warning-box { border: 1px solid color-mix(in srgb, var(--color-primary) 35%, var(--color-border)); background: color-mix(in srgb, var(--color-primary) 7%, var(--color-surface)); border-radius: var(--radius-md); padding: 16px; margin: 18px 0; }
.direct-answer p { margin: 6px 0 0; }
.warning-box { border-color: #f59e0b; background: color-mix(in srgb, #f59e0b 12%, var(--color-surface)); }
.article-meta { display: flex; flex-wrap: wrap; gap: 8px 14px; color: var(--color-muted); font-size: 14px; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); padding: 12px 0; margin: 18px 0; }
.article-meta span:not(:last-child)::after { content: ""; }
.article-meta a { color: var(--color-primary); }
.article-toc { border: 1px solid var(--color-border); background: var(--color-surface); border-radius: var(--radius-md); padding: 12px 14px; margin: 24px 0; }
.article-toc summary { cursor: pointer; font-weight: 700; }
.article-toc nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 14px; margin-top: 12px; }
.article-toc a { color: var(--color-muted); }
.article-toc a[aria-current="true"] { color: var(--color-primary); font-weight: 700; }
.table-wrap { max-width: 100%; overflow-x: auto; margin: 16px 0 22px; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.table-wrap table { width: 100%; border-collapse: collapse; min-width: 620px; }
.table-wrap th, .table-wrap td { text-align: left; padding: 12px; border-bottom: 1px solid var(--color-border); vertical-align: top; }
.table-wrap th { background: color-mix(in srgb, var(--color-bg) 70%, var(--color-surface)); }
.encoding-flow { border-left: 4px solid var(--color-primary); background: var(--color-surface); padding: 12px 16px; margin: 16px 0; }
.encoding-flow p { margin: 6px 0; }
.mini-inspector { border: 1px solid var(--color-border); background: var(--color-surface); border-radius: var(--radius-md); padding: 16px; margin-block: 20px; }
.mini-inspector label { display: block; font-weight: 700; margin-bottom: 8px; }
.mini-inspector input { max-width: 180px; font-size: 28px; text-align: center; }
.mini-inspector dl { margin: 14px 0; }
.problem-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.problem-grid section, .faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); padding: 14px; }
.problem-grid h3 { margin-top: 0; }
.article-tool-grid .tool-card { min-height: 210px; }
.faq-item { margin: 10px 0; }
.faq-item summary { cursor: pointer; font-weight: 700; }
.references { padding-left: 20px; }
.references li { margin: 8px 0; }
.methodology-facts { border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); padding: 16px 18px; margin: 18px 0; }
.methodology-facts dl { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 20px; margin: 12px 0 0; }
.methodology-facts dt { font-size: 13px; color: var(--color-muted); font-weight: 700; }
.methodology-facts dd { margin: 2px 0 0; font-weight: 700; }
.article section[id] { scroll-margin-top: 90px; }
@media (max-width: 720px) { .methodology-facts dl { grid-template-columns: 1fr; } }
.contact-page { max-width: 1180px; margin: 0 auto; padding: 38px 20px; width: 100%; }
.contact-layout { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 32px; align-items: start; margin-top: 20px; }
.contact-form .form-field { margin: 18px 0; }
.contact-form label { display: block; font-weight: 700; margin-bottom: 6px; }
.contact-form .optional { font-weight: 400; color: var(--color-muted); }
.contact-form .checkbox-label { display: flex; align-items: flex-start; gap: 10px; font-weight: 400; }
.contact-form .checkbox-label input { width: auto; min-width: 20px; min-height: 20px; margin-top: 2px; }
.field-help { margin: 6px 0 0; color: var(--color-muted); font-size: 14px; }
.field-error { margin: 6px 0 0; color: #b91c1c; font-size: 14px; font-weight: 700; }
[data-theme="dark"] .field-error { color: #fca5a5; }
input[aria-invalid="true"], textarea[aria-invalid="true"], select[aria-invalid="true"] { border-color: #b91c1c; border-width: 2px; }
.form-error-summary { border: 2px solid #b91c1c; border-radius: var(--radius-md); background: color-mix(in srgb, var(--color-surface) 82%, #ef4444); padding: 14px 16px; margin: 16px 0; }
.form-error-summary h2 { margin-top: 0; font-size: 17px; }
.form-error-summary a { color: #b91c1c; font-weight: 700; }
[data-theme="dark"] .form-error-summary a { color: #fca5a5; }
.honeypot-field { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; }
.contact-technical-fields { border-left: 3px solid var(--color-border); padding-left: 16px; margin: 18px 0; }
.form-privacy-note { color: var(--color-muted); font-size: 14px; margin-top: 16px; max-width: 65ch; }
.contact-sidebar section { border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); padding: 16px; margin-bottom: 16px; }
.contact-sidebar h2 { margin-top: 0; font-size: 17px; }
.contact-success { max-width: 640px; margin: 0 auto; padding: 60px 20px; text-align: center; }
@media (max-width: 900px) { .contact-layout { grid-template-columns: 1fr; } }
.lookup-form { display: flex; gap: 12px; align-items: end; padding-top: 0; }
.lookup-form label { flex: 1; font-weight: 700; }
.char-row { display: grid; grid-template-columns: 72px 1.5fr 1fr 1fr; gap: 14px; align-items: center; border-bottom: 1px solid var(--color-border); padding: 12px 0; }
.char-preview, .big-char { font-size: 48px; line-height: 1; font-family: ui-serif, "Noto Color Emoji", serif; }
.character-detail { display: grid; grid-template-columns: 220px 1fr; gap: 24px; align-items: start; }
.big-char { font-size: 150px; text-align: center; padding: 30px; border: 1px solid var(--color-border); background: var(--color-surface); border-radius: var(--radius-lg); }
dl { display: grid; grid-template-columns: 180px 1fr; gap: 8px 16px; }
dt { color: var(--color-muted); }
.unicode-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); gap: 8px; padding-top: 0; }
.unicode-cell { min-height: 104px; border: 1px solid var(--color-border); background: var(--color-surface); border-radius: var(--radius-sm); padding: 10px; display: grid; gap: 4px; }
.unicode-cell span { font-size: 30px; }
.unicode-cell small { color: var(--color-muted); overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.footer { border-top: 1px solid var(--color-border); margin-top: 40px; padding: 32px 20px; background: var(--color-surface); }
.footer-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 22px; }
.footer-heading { font-size: 15px; font-weight: 700; margin: 0 0 8px; }
.footer a { display: block; color: var(--color-muted); margin: 6px 0; }
.footer-link { display: block; width: auto; border: 0; border-radius: 0; background: transparent; color: var(--color-muted); margin: 6px 0; padding: 0; font: inherit; text-align: left; }
.footer-link:hover { color: var(--color-primary); }
.copyright, .disclaimer { max-width: 1180px; margin: 24px auto 0; color: var(--color-muted); font-size: 14px; }
.disclaimer { margin-top: 8px; }
.toast { position: fixed; right: 18px; bottom: 18px; background: var(--color-text); color: var(--color-bg); border-radius: var(--radius-md); padding: 10px 12px; opacity: 0; pointer-events: none; transition: opacity .2s; }
.toast.show { opacity: 1; }
.cookie-consent { position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 30; max-width: 980px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px; align-items: center; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); box-shadow: var(--shadow-md); padding: 16px; }
.cookie-consent[hidden], .consent-modal[hidden] { display: none; }
.cookie-consent h2, .consent-modal h2, .consent-option h3 { margin: 0; }
.cookie-consent p { margin: 4px 0 0; color: var(--color-muted); max-width: 72ch; }
.cookie-consent__actions, .consent-modal__actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }
.consent-modal { position: fixed; inset: 0; z-index: 40; display: grid; place-items: center; padding: 20px; background: rgb(15 23 42 / 0.48); }
.consent-modal__panel { width: min(620px, 100%); max-height: min(680px, calc(100vh - 40px)); overflow: auto; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); box-shadow: var(--shadow-md); padding: 18px; }
.consent-modal__header { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.consent-option { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 14px; align-items: center; border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 14px; margin: 12px 0; background: color-mix(in srgb, var(--color-bg) 42%, var(--color-surface)); }
.consent-option p, .consent-option small { display: block; margin: 4px 0 0; color: var(--color-muted); }
.consent-option input { width: 22px; height: 22px; }
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto; transition: none !important; } }
@media (max-width: 760px) {
  .cookie-consent { grid-template-columns: 1fr; }
  .cookie-consent__actions, .consent-modal__actions { justify-content: stretch; }
  .cookie-consent__actions .btn, .consent-modal__actions .btn { flex: 1 1 160px; }
}