:root {
  --bg: #ffffff;
  --fg: #0a0a0a;
  --muted: #6b7280;
  --border: #e5e7eb;
  --soft: #fafafa;
  --accent: #0a0a0a;
  --code-bg: #0b0b0b;
  --code-fg: #f5f5f5;
  --ok: #16a34a;
  --warn: #f59e0b;
  --err: #dc2626;
  --radius: 10px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", ui-monospace, Menlo,
    Consolas, monospace;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.55;
  font-size: 16px;
}

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Header ──────────────────────────────────── */
header.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand {
  font-weight: 700; letter-spacing: -0.01em; font-size: 17px;
  display: inline-flex; align-items: center; gap: 8px;
}
.brand .dot {
  width: 8px; height: 8px; border-radius: 999px;
  background: var(--fg);
}
.nav-links { display: flex; gap: 24px; font-size: 14px; color: var(--muted); }
.nav-links a:hover { color: var(--fg); text-decoration: none; }
.nav-cta {
  background: var(--fg); color: #fff;
  padding: 8px 14px; border-radius: 8px; font-size: 14px; font-weight: 500;
  border: none;
}
.nav-cta:hover { background: #1f1f1f; text-decoration: none; }

/* ── Hero ────────────────────────────────────── */
.hero {
  padding: 100px 0 80px;
  text-align: center;
}
.hero .eyebrow {
  display: inline-block;
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); padding: 6px 12px;
  border: 1px solid var(--border); border-radius: 999px;
  margin-bottom: 28px;
}
.hero h1 {
  font-size: 64px; line-height: 1.05; letter-spacing: -0.03em;
  font-weight: 700; margin: 0 auto 20px; max-width: 860px;
}
.hero p.sub {
  font-size: 20px; color: var(--muted); max-width: 620px;
  margin: 0 auto 40px;
}
.hero .cta {
  display: inline-flex; gap: 12px; flex-wrap: wrap; justify-content: center;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 24px; border-radius: 10px;
  font-size: 15px; font-weight: 500;
  border: 1px solid var(--border);
  background: #fff; color: var(--fg);
  transition: transform .06s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { text-decoration: none; border-color: var(--fg); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--fg); color: #fff; border-color: var(--fg); }
.btn.primary:hover { background: #1f1f1f; }

/* ── Metrics ─────────────────────────────────── */
.section { padding: 80px 0; }
.section h2 {
  font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 8px; font-weight: 500;
}
.section h3 {
  font-size: 36px; letter-spacing: -0.02em; margin: 0 0 48px;
  font-weight: 600;
}
.metrics {
  display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 0; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden;
}
.metric {
  padding: 28px; border-right: 1px solid var(--border); background: #fff;
}
.metric:last-child { border-right: none; }
.metric .val {
  font-family: var(--font-mono);
  font-size: 32px; font-weight: 600; letter-spacing: -0.02em;
  font-feature-settings: "tnum" 1;
}
.metric .lbl {
  font-size: 12px; color: var(--muted); margin-top: 4px;
  text-transform: uppercase; letter-spacing: 0.06em;
}

/* ── Playground ──────────────────────────────── */
.pg {
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background: #fff;
}
.pg-tabs {
  display: flex; border-bottom: 1px solid var(--border);
  background: var(--soft);
}
.pg-tab {
  flex: 1; padding: 14px 16px; background: transparent;
  border: none; border-right: 1px solid var(--border);
  font-size: 14px; color: var(--muted);
  font-weight: 500;
}
.pg-tab:last-child { border-right: none; }
.pg-tab.active { background: #fff; color: var(--fg); }
.pg-body {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
}
.pg-col { padding: 20px; }
.pg-col + .pg-col { border-left: 1px solid var(--border); background: var(--soft); }
.pg-col label {
  display: block; font-size: 12px; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 6px;
}
.pg textarea, .pg input[type=text], .pg select {
  width: 100%; font-family: var(--font-mono); font-size: 14px;
  padding: 12px; border: 1px solid var(--border); border-radius: 8px;
  background: #fff; color: var(--fg);
  resize: vertical;
}
.pg textarea { min-height: 140px; }
.pg .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.pg .run {
  margin-top: 14px;
  background: var(--fg); color: #fff; border: none;
  padding: 12px 18px; border-radius: 8px; font-weight: 500;
}
.pg .run:disabled { opacity: .6; cursor: not-allowed; }
.pg pre.out {
  margin: 0; padding: 14px; border-radius: 8px;
  background: var(--code-bg); color: var(--code-fg);
  font-family: var(--font-mono); font-size: 13px;
  white-space: pre-wrap; word-break: break-word;
  min-height: 180px; max-height: 360px; overflow: auto;
}
.pg .meta {
  margin-top: 10px; color: var(--muted); font-size: 12px;
  font-family: var(--font-mono);
}

/* ── Endpoints grid ──────────────────────────── */
.endpoints {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.endpoint {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; background: #fff;
  transition: border-color .15s ease, transform .15s ease;
}
.endpoint:hover { border-color: var(--fg); }
.endpoint .method {
  display: inline-block; font-family: var(--font-mono); font-size: 12px;
  padding: 3px 8px; border-radius: 6px; font-weight: 600; margin-right: 8px;
}
.endpoint .method.post { background: #ecfdf5; color: #047857; }
.endpoint .method.get { background: #eff6ff; color: #1d4ed8; }
.endpoint .path {
  font-family: var(--font-mono); font-size: 14px; font-weight: 500;
}
.endpoint .desc { color: var(--muted); font-size: 14px; margin-top: 8px; }

/* ── Code tabs ───────────────────────────────── */
.code-box {
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background: #fff;
}
.code-tabs {
  display: flex; background: var(--soft); border-bottom: 1px solid var(--border);
}
.code-tab {
  padding: 12px 18px; background: transparent; border: none;
  font-family: var(--font-mono); font-size: 13px; color: var(--muted);
  border-right: 1px solid var(--border);
}
.code-tab.active { background: #fff; color: var(--fg); }
.code-body pre {
  margin: 0; padding: 20px;
  background: var(--code-bg); color: var(--code-fg);
  font-family: var(--font-mono); font-size: 13px;
  line-height: 1.6; overflow: auto;
}

/* ── Auth box ────────────────────────────────── */
.auth-box {
  max-width: 480px;
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background: #fff;
}
.auth-tabs {
  display: flex; border-bottom: 1px solid var(--border);
  background: var(--soft);
}
.auth-tab {
  flex: 1; padding: 12px 16px;
  background: transparent; border: none; border-right: 1px solid var(--border);
  font-size: 14px; color: var(--muted); font-weight: 500;
}
.auth-tab:last-child { border-right: none; }
.auth-tab.active { background: #fff; color: var(--fg); }
.auth-form {
  padding: 24px;
}
.auth-form label {
  display: block; font-size: 12px; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.06em; margin: 6px 0;
}
.auth-form label:first-child { margin-top: 0; }
.auth-form input {
  width: 100%; padding: 12px;
  border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; font-family: var(--font-sans);
  background: #fff; color: var(--fg);
  margin-bottom: 12px;
}
.auth-form input:focus { outline: 2px solid var(--fg); outline-offset: -1px; border-color: var(--fg); }
.auth-form .btn { width: 100%; margin-top: 4px; justify-content: center; }
.auth-error {
  margin-top: 14px; padding: 10px 12px; font-size: 13px;
  background: #fef2f2; border: 1px solid #fecaca; color: #991b1b; border-radius: 8px;
}
.auth-success {
  margin-top: 18px; padding: 14px;
  background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 10px;
}
.auth-success-title {
  font-size: 12px; letter-spacing: 0.06em; color: #047857; text-transform: uppercase; font-weight: 600;
}
.auth-success code {
  display: block; margin-top: 6px; padding: 10px;
  background: var(--code-bg); color: var(--code-fg); border-radius: 6px;
  font-family: var(--font-mono); font-size: 13px; word-break: break-all;
  user-select: all;
}
.copy-btn {
  margin-top: 8px; padding: 6px 12px; font-size: 12px;
  background: #fff; border: 1px solid #bbf7d0; border-radius: 6px; color: #047857;
}
.auth-hint { color: var(--muted); font-size: 12px; margin: 10px 0 0; }

/* ── Footer ──────────────────────────────────── */
footer {
  border-top: 1px solid var(--border); padding: 48px 0 64px;
  color: var(--muted); font-size: 14px;
  margin-top: 80px;
}
.foot {
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.foot a { color: var(--muted); margin-right: 20px; }
.foot a:hover { color: var(--fg); text-decoration: none; }

/* ── Responsive ──────────────────────────────── */
@media (max-width: 900px) {
  .hero h1 { font-size: 44px; }
  .hero { padding: 72px 0 56px; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metric { border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
  .metric:nth-child(2n) { border-right: none; }
  .pg-body { grid-template-columns: 1fr; }
  .pg-col + .pg-col { border-left: none; border-top: 1px solid var(--border); }
  .endpoints { grid-template-columns: 1fr; }
  .nav-links { display: none; }
}

/* ── Stats page ──────────────────────────────── */
.login-card {
  max-width: 420px; margin: 120px auto 80px;
  padding: 32px; border: 1px solid var(--border); border-radius: 14px;
  background: #fff;
}
.login-card h1 { margin: 0 0 6px; font-size: 22px; letter-spacing: -0.02em; }
.login-card p { color: var(--muted); margin: 0 0 24px; font-size: 14px; }
.login-card input {
  width: 100%; padding: 12px; border: 1px solid var(--border);
  border-radius: 8px; font-size: 14px; font-family: var(--font-mono);
}
.login-card button {
  width: 100%; margin-top: 12px; padding: 12px;
  background: var(--fg); color: #fff; border: none; border-radius: 8px;
  font-weight: 500;
}
.dashboard {
  padding: 40px 0 80px;
}
.dash-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; margin-bottom: 32px;
}
.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px;
}
.card .lbl { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }
.card .val { font-size: 24px; font-family: var(--font-mono); font-weight: 600; margin-top: 4px; }
.card .sub { font-size: 12px; color: var(--muted); margin-top: 4px; font-family: var(--font-mono); }
.card.progress .bar {
  margin-top: 10px; height: 6px; background: #f3f4f6; border-radius: 999px; overflow: hidden;
}
.card.progress .bar > span {
  display: block; height: 100%; background: var(--fg); transition: width .4s ease;
}
.panels { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; }
.panel {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px;
}
.panel h3 { margin: 0 0 16px; font-size: 15px; font-weight: 600; }
.table { width: 100%; border-collapse: collapse; font-size: 13px; font-family: var(--font-mono); }
.table th, .table td {
  text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.table th { color: var(--muted); font-weight: 500; }
.pill {
  display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600;
}
.pill.ok { background: #ecfdf5; color: #047857; }
.pill.warn { background: #fffbeb; color: #b45309; }
.pill.err { background: #fef2f2; color: #b91c1c; }
.key-actions { display: flex; gap: 6px; }
.key-actions button {
  font-size: 12px; padding: 4px 10px; border-radius: 6px;
  border: 1px solid var(--border); background: #fff;
}
.key-actions .revoke { color: var(--err); border-color: #fecaca; }
.key-actions .activate { color: var(--ok); border-color: #bbf7d0; }
.stats-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.stats-header h1 { margin: 0; font-size: 22px; letter-spacing: -0.02em; }
.create-key {
  display: flex; gap: 8px; align-items: center; margin-top: 10px;
}
.create-key input {
  flex: 1; padding: 8px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 13px; font-family: var(--font-mono);
}
.create-key button {
  padding: 8px 14px; background: var(--fg); color: #fff; border: none; border-radius: 6px;
  font-size: 13px;
}
.sparkline { height: 60px; width: 100%; }
.sparkline path.stroke { fill: none; stroke: var(--fg); stroke-width: 1.5; }
.sparkline path.fill { fill: rgba(10,10,10,.06); stroke: none; }
.hint { color: var(--muted); font-size: 12px; margin-top: 6px; }
.error-banner {
  background: #fef2f2; color: #991b1b; border: 1px solid #fecaca;
  padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px;
}
@media (max-width: 900px) {
  .dash-grid { grid-template-columns: repeat(2, 1fr); }
  .panels { grid-template-columns: 1fr; }
}