/* GENKAI receipt verifier. No external fonts or assets; light and dark follow the system. */

:root {
  --bg: #f7f7f4;
  --band: #efeee9;
  --surface: #ffffff;
  --text: #18181c;
  --muted: #5d5d67;
  --line: #dfded8;
  --accent: #3730a3;
  --accent-text: #ffffff;
  --accent-soft: #e8e7fb;
  --ok: #11703f;
  --ok-soft: #e3f3e9;
  --bad: #b3261e;
  --bad-soft: #fbe7e5;
  --warn: #8a5300;
  --warn-soft: #fbefd9;
  --code-bg: #f1f0ec;
  --shadow: 0 1px 2px rgb(24 24 28 / 6%), 0 4px 16px rgb(24 24 28 / 5%);
  --radius: 10px;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0f13;
    --band: #15151b;
    --surface: #1a1a21;
    --text: #ececf1;
    --muted: #a3a3ae;
    --line: #2c2c36;
    --accent: #a5b4fc;
    --accent-text: #11112a;
    --accent-soft: #23234a;
    --ok: #4ad295;
    --ok-soft: #12301f;
    --bad: #ff7b70;
    --bad-soft: #3a1714;
    --warn: #f3b552;
    --warn-soft: #382a10;
    --code-bg: #14141a;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 4px 16px rgb(0 0 0 / 25%);
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

code, pre, textarea, input[type="url"] { font-family: var(--mono); }
code { font-size: 0.9em; background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 5px; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; }
h2 { font-size: 1.6rem; margin: 0 0 0.4rem; }
h3 { font-size: 1.05rem; margin: 0 0 0.35rem; }
p { margin: 0 0 1rem; }

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

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 28px; } }

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

.skip-link { position: absolute; left: 12px; top: -48px; padding: 8px 14px; background: var(--accent); color: var(--accent-text); border-radius: 8px; z-index: 10; }
.skip-link:focus { top: 12px; }

/* Header */

.site-header { border-bottom: 1px solid var(--line); background: var(--bg); }
.header-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 8px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 750; letter-spacing: 0.12em; color: var(--text); text-decoration: none; }
.brand-mark { width: 22px; height: 22px; border-radius: 6px; background: var(--accent); position: relative; }
.brand-mark::after { content: ""; position: absolute; inset: 5px; border: 2px solid var(--accent-text); border-radius: 50%; }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 18px; font-size: 0.95rem; }
.site-nav a { color: var(--muted); text-decoration: none; }
.site-nav a:hover { color: var(--text); }

/* Hero */

.hero { padding: 56px 0 48px; }
.eyebrow { color: var(--accent); font-weight: 650; font-size: 0.9rem; letter-spacing: 0.02em; margin-bottom: 0.75rem; }
.hero h1 { font-size: clamp(2rem, 4.6vw, 3.2rem); max-width: 20ch; margin: 0 0 1.1rem; letter-spacing: -0.02em; }
.lede { font-size: 1.12rem; color: var(--muted); max-width: 64ch; }
.lede em { color: var(--text); font-style: normal; font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 1.6rem 0 1rem; }
.fine { font-size: 0.88rem; color: var(--muted); margin: 0; }
.notice { margin-top: 1rem; padding: 12px 14px; border-radius: var(--radius); background: var(--warn-soft); color: var(--warn); }

/* Sections */

section { padding: 48px 0; }
.band { background: var(--band); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 70ch; margin-bottom: 1.4rem; }
.section-head p { color: var(--muted); }

/* Buttons */

.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 42px; padding: 0 18px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--surface); color: var(--text);
  font: 600 0.95rem/1 var(--sans); text-decoration: none; cursor: pointer;
  transition: background-color 120ms ease, border-color 120ms ease, transform 120ms ease;
}
.button:hover { border-color: var(--muted); }
.button:active { transform: translateY(1px); }
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.button.primary:hover { filter: brightness(1.08); }
.button.danger { color: var(--bad); }
.button.danger:hover { border-color: var(--bad); }
.button[disabled] { opacity: 0.55; cursor: progress; }

/* Deployment facts */

.status-line { display: flex; align-items: center; gap: 10px; font-weight: 600; margin-bottom: 1rem; }
.status-line.ok { color: var(--ok); }
.status-line.bad { color: var(--bad); }
.status-line ul { margin: 0.4rem 0 0; font-weight: 400; }
.dot { flex: none; width: 10px; height: 10px; border-radius: 50%; background: var(--muted); }
.dot.ok { background: var(--ok); }
.dot.bad { background: var(--bad); }
.dot.pending { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.3; } }

.facts { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 12px; margin: 0; }
.fact { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; min-width: 0; }
.fact dt { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 4px; }
.fact dd { margin: 0; font-family: var(--mono); font-size: 0.9rem; overflow-wrap: anywhere; }
.fact .note { display: block; font-family: var(--sans); font-size: 0.82rem; color: var(--muted); margin-top: 4px; }

/* Verify form */

.samples { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 1.4rem; }
.verify-form { display: grid; gap: 18px; grid-template-columns: 1fr; }
@media (min-width: 900px) { .verify-form { grid-template-columns: 1fr 1fr; } .rpc-field, .form-actions { grid-column: 1 / -1; } }
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.field label, .rpc-field label { font-weight: 650; }
.file-button { font-size: 0.85rem; font-weight: 600; color: var(--accent); cursor: pointer; }
.file-button:focus-within { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.hint { font-size: 0.84rem; color: var(--muted); margin: 0; }

textarea, input[type="url"] {
  width: 100%; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); color: var(--text); font-size: 0.82rem; line-height: 1.45;
}
textarea { height: 17rem; padding: 12px; resize: vertical; tab-size: 2; }
textarea.dragging { border-color: var(--accent); background: var(--accent-soft); }
input[type="url"] { min-height: 42px; padding: 0 12px; font-size: 0.9rem; }
.form-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; }

/* Result */

.result { margin-top: 28px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); box-shadow: var(--shadow); overflow: hidden; scroll-margin-top: 16px; }
.result:focus { outline: none; }
.result.stale { opacity: 0.6; }
.result-banner { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; padding: 18px 20px; border-bottom: 1px solid var(--line); border-left: 6px solid var(--muted); }
.result.valid .result-banner { border-left-color: var(--ok); background: var(--ok-soft); }
.result.invalid .result-banner { border-left-color: var(--bad); background: var(--bad-soft); }
.result.error .result-banner { border-left-color: var(--warn); background: var(--warn-soft); }
.result-word { font-size: 1.5rem; font-weight: 800; letter-spacing: 0.02em; }
.result.valid .result-word { color: var(--ok); }
.result.invalid .result-word { color: var(--bad); }
.result.error .result-word { color: var(--warn); }
.result-summary { margin: 0; flex: 1 1 260px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; }
.tags li { font-size: 0.78rem; font-weight: 650; padding: 3px 9px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); color: var(--muted); }
.result-body { padding: 18px 20px 22px; display: grid; gap: 18px; }
.result-body h3 { font-size: 0.95rem; }
.failures ul, .checks ul, .general ul { margin: 0; padding-left: 1.2rem; }
.failures li { margin-bottom: 4px; }
.failures code { color: var(--bad); }
.checks summary { cursor: pointer; font-weight: 650; }
.checks ul { margin-top: 8px; color: var(--muted); }
.callout { padding: 12px 14px; border-radius: var(--radius); background: var(--accent-soft); margin: 0; }

.spinner { width: 18px; height: 18px; border-radius: 50%; border: 3px solid var(--line); border-top-color: var(--accent); animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.receipts { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.receipt { border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 14px; min-width: 0; }
.receipt.bad { border-color: var(--bad); }
.receipt-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.receipt-index { font-family: var(--mono); color: var(--muted); font-size: 0.85rem; }
.receipt-action { font-weight: 600; flex: 1 1 220px; overflow-wrap: anywhere; }
.receipt-status { font-size: 0.85rem; font-weight: 650; display: inline-flex; align-items: center; gap: 6px; }
.receipt-status.ok { color: var(--ok); }
.receipt-status.bad { color: var(--bad); }
.pill { font-size: 0.78rem; font-weight: 750; text-transform: uppercase; letter-spacing: 0.05em; padding: 3px 9px; border-radius: 999px; }
.pill.allow { background: var(--ok-soft); color: var(--ok); }
.pill.deny { background: var(--bad-soft); color: var(--bad); }
.pill.escalate { background: var(--warn-soft); color: var(--warn); }
.receipt-meta { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 210px), 1fr)); gap: 8px 16px; margin: 10px 0 0; }
.receipt-meta dt { font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.receipt-meta dd { margin: 0; font-family: var(--mono); font-size: 0.82rem; overflow-wrap: anywhere; }
.problems { margin: 10px 0 0; padding: 10px 12px 10px 28px; background: var(--bad-soft); border-radius: 8px; color: var(--text); font-size: 0.88rem; }
.problems li { overflow-wrap: anywhere; }

/* How it works */

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); counter-reset: step; }
.steps li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; counter-increment: step; }
.steps li::before { content: counter(step); display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 750; margin-bottom: 10px; }
.steps p { color: var(--muted); margin: 0; font-size: 0.95rem; }

/* API */

.code { background: var(--code-bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; overflow-x: auto; font-size: 0.82rem; line-height: 1.55; margin: 0 0 1.4rem; }
.code code { background: none; padding: 0; font-size: inherit; }
.endpoints { display: grid; gap: 10px; margin: 0; }
.endpoints div { display: grid; gap: 2px 18px; grid-template-columns: 1fr; }
@media (min-width: 720px) { .endpoints div { grid-template-columns: 260px 1fr; } }
.endpoints dd { margin: 0; color: var(--muted); }

/* Footer */

.site-footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 0.9rem; }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; }
.footer-row p { margin: 0; max-width: 70ch; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}