/* 21pdf — shared stylesheet (ported from the api4pdf Claude Design template).
   Dark developer aesthetic. Mono + display pairing. */

:root {
  --bg: #0B0B0F;
  --bg-1: #111117;
  --bg-2: #16161D;
  --bg-3: #1D1D26;
  --line: #26262F;
  --line-2: #33333F;
  --fg: #F5F5F2;
  --fg-2: #C9C9C4;
  --fg-3: #8A8A84;
  --fg-4: #5A5A56;
  --accent: #7C5CFF;
  --accent-2: #A3E635;
  --accent-3: #FF6B6B;
  --warn: #F5C451;

  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --display: 'Inter Tight', -apple-system, sans-serif;

  --maxw: 1280px;
  --radius: 8px;
  --radius-sm: 4px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv01", "cv11";
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

code, pre, .mono { font-family: var(--mono); }

h1, h2, h3, h4, h5 {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0 0 1em; text-wrap: pretty; }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 11, 15, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  display: flex; align-items: center; gap: 32px;
  height: 56px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}
.logo {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--fg);
  display: flex; align-items: center; gap: 8px;
}
.logo-mark {
  width: 18px; height: 18px;
  background: var(--accent);
  border-radius: 3px;
  position: relative;
}
.logo-mark::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-left: 2px solid var(--bg);
  border-bottom: 2px solid var(--bg);
}
.logo b { color: var(--accent); font-weight: 600; }

.nav {
  display: flex; gap: 4px; align-items: center;
  font-family: var(--mono);
  font-size: 13px;
}
.nav a {
  padding: 6px 10px;
  color: var(--fg-2);
  border-radius: var(--radius-sm);
}
.nav a:hover { color: var(--fg); background: var(--bg-2); }
.nav a.active { color: var(--fg); background: var(--bg-2); }

.nav-right { margin-left: auto; display: flex; gap: 8px; align-items: center; }

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 120ms, border-color 120ms, transform 120ms;
  color: var(--fg);
  background: transparent;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); color: var(--fg); }
.btn-ghost { color: var(--fg-2); }
.btn-ghost:hover { background: var(--bg-2); color: var(--fg); }
.btn-outline { border-color: var(--line-2); }
.btn-outline:hover { border-color: var(--fg-3); }
.btn-primary {
  background: var(--accent); color: #fff;
}
.btn-primary:hover { background: #8F73FF; color: #fff; }
.btn-lg { padding: 12px 20px; font-size: 14px; }

/* ---------- Common page ---------- */
.page {
  padding: 80px 0 120px;
}
.page h1.page-title {
  font-size: clamp(42px, 6vw, 72px);
  line-height: 0.95;
  letter-spacing: -0.035em;
  margin-bottom: 16px;
}
.page p.page-kicker {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent-2);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.page p.page-lede {
  font-size: 20px;
  color: var(--fg-2);
  max-width: 640px;
  line-height: 1.45;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

/* ---------- Code ---------- */
.code {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.7;
  overflow: hidden;
}
.code-head {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  font-size: 12px;
  color: var(--fg-3);
}
.code-tabs { display: flex; gap: 0; }
.code-tab {
  padding: 4px 10px;
  cursor: pointer;
  color: var(--fg-3);
  border-radius: var(--radius-sm);
  font-size: 12px;
}
.code-tab.active { color: var(--fg); background: var(--bg-3); }
.code-dots { display: flex; gap: 6px; }
.code-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--line-2);
}
.code-body {
  padding: 18px 20px;
  overflow-x: auto;
}
.code-body pre { margin: 0; white-space: pre; }

.tok-key { color: #C792EA; }
.tok-str { color: #A3E635; }
.tok-num { color: #F5C451; }
.tok-com { color: var(--fg-4); font-style: italic; }
.tok-fn  { color: #82AAFF; }
.tok-var { color: #FFCB6B; }
.tok-pun { color: var(--fg-3); }

/* ---------- Section ---------- */
.section { padding: 96px 0; border-top: 1px solid var(--line); }
.section-head { margin-bottom: 48px; max-width: 640px; }
.section-head .kicker {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent-2);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: clamp(32px, 4vw, 52px);
  letter-spacing: -0.03em;
  line-height: 1;
}
.section-head p {
  color: var(--fg-2);
  font-size: 18px;
  margin-top: 16px;
}

/* ---------- Grid utilities ---------- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }

@media (max-width: 880px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav { display: none; }
}

.cell {
  background: var(--bg);
  padding: 32px;
}
.cell h3 { font-size: 20px; margin-bottom: 8px; letter-spacing: -0.01em; }
.cell .lead { color: var(--fg-2); font-size: 14px; }
.cell .num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-4);
  margin-bottom: 18px;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 64px 0 48px;
  background: var(--bg-1);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 48px;
}
.footer h4 {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--fg-3);
  margin-bottom: 16px;
  font-weight: 500;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer a { color: var(--fg-2); font-size: 14px; }
.footer a:hover { color: var(--accent); }
.footer-bottom {
  max-width: var(--maxw);
  margin: 48px auto 0;
  padding: 24px 32px 0;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center;
  color: var(--fg-4); font-family: var(--mono); font-size: 12px;
}
@media (max-width: 880px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- Pills / badges ---------- */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--fg-2);
  background: var(--bg-1);
}
.pill .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 8px var(--accent-2); }

/* ---------- Tags ---------- */
.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 11px;
  background: var(--bg-2);
  color: var(--fg-2);
  border: 1px solid var(--line);
}
.tag-get  { color: #82AAFF; border-color: #82AAFF40; background: #82AAFF15; }
.tag-post { color: #A3E635; border-color: #A3E63540; background: #A3E63515; }
.tag-del  { color: #FF6B6B; border-color: #FF6B6B40; background: #FF6B6B15; }
.tag-put  { color: #F5C451; border-color: #F5C45140; background: #F5C45115; }

/* selection */
::selection { background: var(--accent); color: #fff; }

/* scrollbar (webkit) */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg-4); }

/* ---------- Motion bg ---------- */
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.hero-bg::before {
  content: '';
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(circle at 20% 30%, rgba(124,92,255,0.18), transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(163,230,101,0.10), transparent 40%);
  filter: blur(40px);
  animation: drift 22s ease-in-out infinite alternate;
}
@keyframes drift {
  0% { transform: translate(-3%, -2%) rotate(-2deg); }
  100% { transform: translate(3%, 2%) rotate(2deg); }
}

.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  opacity: 0.4;
  pointer-events: none;
}

/* typing cursor */
.cursor {
  display: inline-block;
  width: 0.55ch;
  background: var(--accent);
  animation: blink 1s steps(1) infinite;
  margin-left: 2px;
  vertical-align: -2px;
  height: 0.9em;
}
@keyframes blink { 50% { opacity: 0; } }

/* helper */
.mt-xs { margin-top: 8px; } .mt-sm { margin-top: 16px; }
.mt-md { margin-top: 24px; } .mt-lg { margin-top: 48px; }
.mt-xl { margin-top: 80px; }
.text-dim { color: var(--fg-3); }
.text-accent { color: var(--accent); }
.text-signal { color: var(--accent-2); }

/* kbd */
kbd {
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 6px;
  border: 1px solid var(--line-2);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--bg-2);
  color: var(--fg-2);
}

hr.rule { border: 0; border-top: 1px solid var(--line); margin: 48px 0; }

/* tables */
table.t {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 13px;
}
table.t th, table.t td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}
table.t th {
  color: var(--fg-3);
  font-weight: 500;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.08em;
}