:root {
  --ink: #0f1115;
  --ink-raised: #15181f;
  --ink-inset: #0b0d11;
  --paper: #edeef2;
  --slate: #8a90a6;
  --slate-dim: #565c6e;
  --fresh: #4ade80;
  --fresh-dim: #1f3a2a;
  --stale: #e2725b;
  --stale-dim: #3a241f;
  --line: #262a34;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: ui-sans-serif, Inter, "Segoe UI", system-ui, -apple-system, sans-serif;
  --maxw: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
button { font-family: inherit; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.eyebrow { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.02em; color: var(--slate); margin: 0 0 14px; }
.eyebrow::before { content: "// "; color: var(--slate-dim); }

header.nav { position: sticky; top: 0; z-index: 20; background: rgba(15, 17, 21, 0.9); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; gap: 16px; }
.logo { font-family: var(--mono); font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em; text-decoration: none; display: flex; align-items: center; gap: 8px; flex: none; }
.logo .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--fresh); box-shadow: 0 0 8px var(--fresh); }
.nav-links { display: flex; gap: 16px; align-items: center; font-size: 0.9rem; }
.nav-links a { text-decoration: none; color: var(--slate); }
.nav-links a:hover { color: var(--paper); }
.nav-balance { font-family: var(--mono); font-size: 0.85rem; color: var(--fresh); }
.nav-form { margin: 0; }

.btn {
  font-family: var(--sans); font-size: 0.88rem; font-weight: 600; padding: 9px 16px; border-radius: 6px;
  border: 1px solid var(--line); background: transparent; color: var(--paper); text-decoration: none;
  cursor: pointer; transition: border-color 0.15s, transform 0.15s, background 0.15s, opacity 0.15s;
  display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover, .btn:focus-visible { border-color: var(--slate); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.primary { background: var(--fresh); border-color: var(--fresh); color: #0a1a10; }
.btn.primary:hover { background: #5ee596; }
.btn.small { padding: 6px 12px; font-size: 0.8rem; }
:focus-visible { outline: 2px solid var(--fresh); outline-offset: 2px; }

input[type="text"], input[type="email"], input[type="password"], input[type="number"] {
  width: 100%; background: var(--ink-inset); border: 1px solid var(--line); border-radius: 6px;
  color: var(--paper); font-family: var(--sans); font-size: 0.92rem; padding: 10px 12px;
}
input:focus-visible { outline: 2px solid var(--fresh); outline-offset: 1px; }
label.field-label { display: block; font-family: var(--mono); font-size: 0.78rem; color: var(--slate); margin-bottom: 6px; }
.field { margin-bottom: 14px; }

section { padding: 64px 0; border-top: 1px solid var(--line); }
h1 { font-family: var(--mono); font-size: clamp(2rem, 4.2vw, 3.1rem); line-height: 1.08; letter-spacing: -0.015em; margin: 0 0 20px; font-weight: 700; }
h1 .fresh { color: var(--fresh); }
h2 { font-family: var(--mono); font-size: clamp(1.4rem, 2.4vw, 1.8rem); letter-spacing: -0.01em; margin: 0 0 16px; }
.lede { color: var(--slate); font-size: 1.06rem; max-width: 48ch; margin: 0 0 28px; }
.section-sub { color: var(--slate); max-width: 60ch; margin: 0 0 32px; font-size: 1rem; }

.card { border: 1px solid var(--line); border-radius: 12px; padding: 24px; background: var(--ink-raised); }
.card + .card { margin-top: 20px; }
.card h3 { font-family: var(--mono); font-size: 1.05rem; margin: 0 0 4px; }
.card .hint { color: var(--slate); font-size: 0.86rem; margin: 0 0 18px; }

.msg { font-family: var(--mono); font-size: 0.85rem; padding: 10px 12px; border-radius: 6px; margin-top: 12px; }
.msg.error { background: var(--stale-dim); color: var(--stale); }
.msg.success { background: var(--fresh-dim); color: var(--fresh); }

.hero { padding: 84px 0 60px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

.terminal { background: var(--ink-raised); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; box-shadow: 0 20px 60px -20px rgba(0,0,0,0.6); }
.terminal-bar { display: flex; gap: 6px; padding: 11px 14px; border-bottom: 1px solid var(--line); }
.terminal-bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.terminal-body { font-family: var(--mono); font-size: 0.85rem; padding: 20px; min-height: 210px; }
.terminal-body .prompt { color: var(--slate-dim); }
.status-line { display: flex; gap: 10px; align-items: flex-start; margin-top: 14px; }
.status-glyph { font-weight: 700; width: 1.1em; flex: none; }
.status-detail { color: var(--slate); margin: 4px 0 0 1.9em; }
.status-line.stale .status-glyph, .status-line.stale .status-title { color: var(--stale); }
.comment-box { margin: 14px 0 0 1.9em; padding: 10px 12px; background: var(--ink-inset); border: 1px solid var(--line); border-radius: 6px; color: var(--slate); }
.comment-box .cost { color: var(--fresh); }

.auth-wrap { max-width: 420px; margin: 0 auto; }
.tabs { display: flex; gap: 4px; margin-bottom: 20px; background: var(--ink-inset); border-radius: 8px; padding: 4px; }
.tabs a { flex: 1; text-align: center; text-decoration: none; color: var(--slate); font-size: 0.88rem; font-weight: 600; padding: 8px; border-radius: 6px; }
.tabs a.active { background: var(--ink-raised); color: var(--paper); }

.balance-row { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.balance-amount { font-family: var(--mono); font-size: 2.4rem; font-weight: 700; }
.quick-amounts { display: flex; gap: 8px; margin: 14px 0; flex-wrap: wrap; align-items: center; }
.quick-amounts button { font-family: var(--mono); }
.quick-amounts input[name="amountCents"] { display: none; }

table.usage-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
table.usage-table th { text-align: left; color: var(--slate); font-family: var(--mono); font-weight: 500; font-size: 0.78rem; padding: 8px 10px; border-bottom: 1px solid var(--line); }
table.usage-table td { padding: 8px 10px; border-bottom: 1px solid var(--line); font-family: var(--mono); }
table.usage-table tbody tr:hover { background: var(--ink-inset); }
.empty-row td { color: var(--slate-dim); text-align: center; padding: 24px; }

.keys-header { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 4px; }
.keys-header h3 { margin: 0; }
.badge { display: inline-block; background: var(--ink-inset); color: var(--slate); font-family: var(--mono); font-size: 0.72rem; padding: 2px 8px; border-radius: 999px; margin-left: 8px; vertical-align: middle; }

details.create-key { position: relative; }
details.create-key summary { list-style: none; cursor: pointer; }
details.create-key summary::-webkit-details-marker { display: none; }
.create-key-form { display: flex; gap: 8px; align-items: flex-end; margin: 14px 0; flex-wrap: wrap; }
.create-key-form .field { margin-bottom: 0; min-width: 200px; }

.key-label { font-weight: 600; }
.key-masked { font-family: var(--mono); font-size: 0.78rem; color: var(--slate); margin-top: 2px; }
.btn.danger { border-color: var(--stale); color: var(--stale); }
.btn.danger:hover { background: var(--stale-dim); }

.key-reveal { font-family: var(--mono); font-size: 0.82rem; background: var(--ink-inset); border: 1px solid var(--fresh); border-radius: 6px; padding: 12px; word-break: break-all; margin-top: 12px; }

.rate-table { width: 100%; border-collapse: collapse; margin-bottom: 32px; font-size: 0.9rem; }
.rate-table th, .rate-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
.rate-table th { font-family: var(--mono); color: var(--slate); font-weight: 500; font-size: 0.78rem; }
.rate-table td { font-family: var(--mono); }

.calculator { border: 1px solid var(--line); border-radius: 12px; padding: 28px; background: var(--ink-raised); }
.calc-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 20px; }
.calc-field label { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 0.85rem; margin-bottom: 8px; }
.calc-field label .val { color: var(--fresh); }
.calc-field input[type="range"] { width: 100%; accent-color: var(--fresh); }
.calc-result { border-top: 1px solid var(--line); padding-top: 18px; display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.calc-result .amount { font-family: var(--mono); font-size: 1.9rem; font-weight: 700; }
.calc-result .amount small { font-size: 0.95rem; color: var(--slate); font-weight: 500; }

footer { padding: 44px 0 60px; }
.foot-grid { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 24px; }
.foot-links { display: flex; gap: 20px; flex-wrap: wrap; font-family: var(--mono); font-size: 0.85rem; }
.foot-links a { text-decoration: none; color: var(--slate); }
.foot-links a:hover { color: var(--paper); }
.foot-note { color: var(--slate-dim); font-size: 0.82rem; max-width: 40ch; }

.error-page { padding: 120px 0; text-align: center; }

@media (max-width: 860px) {
  .hero-grid, .calc-controls { grid-template-columns: 1fr; }
  .nav-links a:not(.btn) { display: none; }
}