/* OpenSkills — design tokens come from the ui-ux-pro-max design-system run:
   Minimalism & Swiss style, indigo primary, mono/sans pair.
   Every rule here is hand-written; there is no framework and no build step. */

:root {
  --primary: #4f46e5;
  --on-primary: #ffffff;
  --primary-soft: #e0e7ff;
  --secondary: #6366f1;
  --accent: #ea580c;
  --bg: #eef2ff;
  --fg: #312e81;
  --card: #ffffff;
  --card-fg: #312e81;
  --muted: #ebeef8;
  --muted-fg: #475569;
  --border: #c7d2fe;
  --destructive: #dc2626;
  --ring: #4f46e5;
  --shadow-sm: 0 1px 2px rgba(49, 46, 129, 0.08);
  --shadow-md: 0 8px 24px rgba(49, 46, 129, 0.12);
  --radius: 14px;
  --radius-sm: 9px;
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --speed: 200ms;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #818cf8;
    --on-primary: #0b1020;
    --primary-soft: #1e2547;
    --secondary: #a5b4fc;
    --accent: #fb923c;
    --bg: #0b1020;
    --fg: #e0e7ff;
    --card: #131a2e;
    --card-fg: #e0e7ff;
    --muted: #1b2440;
    --muted-fg: #a5b4fc;
    --border: #2a3560;
    --destructive: #f87171;
    --ring: #818cf8;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.55);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
  border-radius: 4px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: 20px;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--primary);
  color: var(--on-primary);
}

.brand-mark svg {
  width: 18px;
  height: 18px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav a {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--muted-fg);
  font-size: 0.925rem;
  font-weight: 500;
  transition: background var(--speed) ease, color var(--speed) ease;
}

.nav a:hover {
  background: var(--primary-soft);
  color: var(--fg);
  text-decoration: none;
}

.nav a[aria-current="page"] {
  color: var(--fg);
  background: var(--primary-soft);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: var(--on-primary);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--speed) ease, box-shadow var(--speed) ease, background var(--speed) ease;
}

.btn:hover {
  background: color-mix(in srgb, var(--primary) 88%, #000);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(1px);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn-ghost {
  background: transparent;
  color: var(--fg);
  border-color: var(--border);
}

.btn-ghost:hover {
  background: var(--primary-soft);
  color: var(--fg);
}

.btn-sm {
  padding: 7px 12px;
  font-size: 0.85rem;
}

.btn svg {
  width: 17px;
  height: 17px;
}

/* ---------- hero ---------- */

.hero {
  padding: 64px 0 40px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--muted-fg);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #16a34a;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 5vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.hero h1 em {
  font-style: normal;
  color: var(--primary);
}

.hero p.lede {
  max-width: 620px;
  margin: 0 auto 30px;
  color: var(--muted-fg);
  font-size: 1.0625rem;
}

/* ---------- search ---------- */

.search {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 620px;
  margin: 0 auto;
  padding: 6px 6px 6px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--speed) ease, border-color var(--speed) ease;
}

.search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 18%, transparent);
}

.search svg {
  flex: none;
  width: 19px;
  height: 19px;
  color: var(--muted-fg);
}

.search input {
  flex: 1;
  min-width: 0;
  padding: 10px 0;
  border: 0;
  background: transparent;
  color: var(--fg);
  font-family: inherit;
  font-size: 1rem;
}

.search input:focus {
  outline: none;
}

.search .btn {
  border-radius: 999px;
  padding-inline: 20px;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  margin-top: 22px;
  color: var(--muted-fg);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.stats strong {
  color: var(--fg);
}

/* ---------- tags ---------- */

.tagbar {
  display: flex;
  gap: 8px;
  padding: 4px 0 26px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.chip {
  flex: none;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  color: var(--muted-fg);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  cursor: pointer;
  transition: background var(--speed) ease, color var(--speed) ease, border-color var(--speed) ease;
}

.chip:hover {
  border-color: var(--primary);
  color: var(--fg);
}

.chip[aria-pressed="true"] {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-primary);
}

.chip .count {
  opacity: 0.65;
  margin-left: 6px;
}

/* ---------- grid ---------- */

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.section-head p {
  margin: 0;
  color: var(--muted-fg);
  font-size: 0.875rem;
  font-family: var(--font-mono);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 16px;
  padding-bottom: 64px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--card-fg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--speed) ease, box-shadow var(--speed) ease, border-color var(--speed) ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--primary) 45%, var(--border));
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.card h3 {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--muted-fg);
  font-size: 0.9rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card .meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  padding-top: 6px;
  color: var(--muted-fg);
  font-family: var(--font-mono);
  font-size: 0.71rem;
}

.tag {
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
}

.meta .sep {
  opacity: 0.5;
}

/* ---------- states ---------- */

.notice {
  padding: 18px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--muted-fg);
  text-align: center;
  font-size: 0.925rem;
}

.notice.error {
  border-color: var(--destructive);
  color: var(--destructive);
}

.skeleton {
  height: 148px;
  border-radius: var(--radius);
  background: linear-gradient(90deg, var(--muted) 25%, var(--card) 50%, var(--muted) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite linear;
}

@keyframes shimmer {
  to {
    background-position: -200% 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- dialog ---------- */

dialog {
  width: min(620px, calc(100vw - 32px));
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--fg);
  box-shadow: var(--shadow-md);
}

dialog::backdrop {
  background: rgba(15, 18, 40, 0.55);
  backdrop-filter: blur(2px);
}

.dialog-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px 0;
}

.dialog-head h2 {
  margin: 0;
  font-size: 1.15rem;
}

.dialog-head p {
  margin: 4px 0 0;
  color: var(--muted-fg);
  font-size: 0.875rem;
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted-fg);
  cursor: pointer;
  transition: background var(--speed) ease, color var(--speed) ease;
}

.icon-btn:hover {
  background: var(--muted);
  color: var(--fg);
}

.dialog-body {
  padding: 18px 24px;
}

.dialog-foot {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 0 24px 22px;
}

.drop {
  display: grid;
  place-items: center;
  gap: 8px;
  padding: 30px 20px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--speed) ease, background var(--speed) ease;
}

.drop:hover,
.drop.dragover {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.drop svg {
  width: 26px;
  height: 26px;
  color: var(--primary);
}

.drop strong {
  font-size: 0.95rem;
}

.drop span {
  color: var(--muted-fg);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

.field {
  display: grid;
  gap: 6px;
  margin-top: 16px;
}

.field label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted-fg);
}

.field input,
.field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--fg);
  font-family: inherit;
  font-size: 0.925rem;
  transition: border-color var(--speed) ease, box-shadow var(--speed) ease;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary) 16%, transparent);
}

.field .hint {
  color: var(--muted-fg);
  font-size: 0.75rem;
}

.form-error {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--destructive) 12%, transparent);
  color: var(--destructive);
  font-size: 0.85rem;
}

/* ---------- toast ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 60;
  transform: translate(-50%, 140%);
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--fg);
  color: var(--bg);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  transition: transform 260ms cubic-bezier(0.22, 1, 0.36, 1), opacity 260ms ease;
  opacity: 0;
}

.toast.show {
  transform: translate(-50%, 0);
  opacity: 1;
}

/* ---------- mcp banner ---------- */

.mcp-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  justify-content: space-between;
  margin: 0 0 40px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  background: var(--card);
}

.mcp-banner h2 {
  margin: 0 0 2px;
  font-size: 0.95rem;
}

.mcp-banner p {
  margin: 0;
  color: var(--muted-fg);
  font-size: 0.83rem;
}

.copy-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1 1 340px;
}

.copy-row code {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

/* ---------- skill page ---------- */

.skill-head {
  padding: 44px 0 26px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 30px;
}

.backlink {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 18px;
  color: var(--muted-fg);
  font-size: 0.85rem;
  cursor: pointer;
}

.backlink:hover {
  color: var(--fg);
  text-decoration: none;
}

.skill-head h1 {
  margin: 0 0 10px;
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.skill-head .lede {
  margin: 0 0 16px;
  max-width: 720px;
  color: var(--muted-fg);
}

.skill-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: var(--muted-fg);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.skill-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.prose {
  max-width: 780px;
  padding-bottom: 80px;
  font-size: 1rem;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  margin: 1.8em 0 0.6em;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.prose h1 {
  font-size: 1.7rem;
}

.prose h2 {
  font-size: 1.35rem;
}

.prose h3 {
  font-size: 1.12rem;
}

.prose p,
.prose ul,
.prose ol {
  margin: 0 0 1em;
}

.prose ul,
.prose ol {
  padding-left: 1.4em;
}

.prose li {
  margin: 0.25em 0;
}

.prose code {
  padding: 0.15em 0.4em;
  border-radius: 5px;
  background: var(--muted);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 0.87em;
}

.prose pre {
  margin: 0 0 1.2em;
  padding: 16px 18px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--muted);
  font-size: 0.85rem;
  line-height: 1.55;
}

.prose pre code {
  padding: 0;
  background: none;
  font-size: inherit;
}

.prose blockquote {
  margin: 0 0 1.2em;
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--border);
  color: var(--muted-fg);
}

.prose table {
  width: 100%;
  margin: 0 0 1.2em;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.prose th,
.prose td {
  padding: 9px 12px;
  border: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--muted);
  font-weight: 600;
}

.prose hr {
  margin: 2em 0;
  border: 0;
  border-top: 1px solid var(--border);
}

.prose a {
  text-decoration: underline;
}

/* ---------- docs page ---------- */

.docs {
  display: grid;
  gap: 22px;
  max-width: 820px;
  padding: 44px 0 80px;
}

.docs h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
}

.docs > p {
  margin: 0;
  color: var(--muted-fg);
}

.docs section {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
}

.docs h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.docs h3 {
  margin: 18px 0 8px;
  font-size: 0.95rem;
}

.docs p,
.docs li {
  color: var(--muted-fg);
  font-size: 0.925rem;
}

.docs pre {
  margin: 10px 0;
  padding: 14px 16px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--fg);
}

.docs code {
  font-family: var(--font-mono);
  font-size: 0.86em;
}

.docs ul {
  padding-left: 1.2em;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 0 40px;
  color: var(--muted-fg);
  font-size: 0.82rem;
}

.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  justify-content: space-between;
  align-items: center;
}

.site-footer nav {
  display: flex;
  gap: 16px;
}

@media (max-width: 640px) {
  .hero {
    padding-top: 44px;
  }

  .nav a:not(.btn) {
    padding: 8px;
  }

  .search {
    padding-left: 12px;
  }

  .search .btn span {
    display: none;
  }
}