:root {
  --ink: #1a1714;
  --ink-soft: #4f4a44;
  --ink-faint: #8a837a;
  --paper: #f6f3ec;
  --paper-2: #fffdf8;
  --line: #e2dccf;
  --maroon: #7a2230;
  --maroon-deep: #5c1722;
  --gold: #c08a2d;
  --ok: #2f7d4f;
  --bad: #b23c3c;
  --code-bg: #1d1a17;
  --code-ink: #ece6da;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(26, 23, 20, .04), 0 12px 32px -16px rgba(26, 23, 20, .22);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: "Inter", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.backdrop {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(60% 50% at 80% -10%, rgba(192, 138, 45, .10), transparent 70%),
    radial-gradient(50% 40% at 0% 0%, rgba(122, 34, 48, .07), transparent 70%);
}

.wrap { width: min(960px, 92vw); margin-inline: auto; }

a { color: var(--maroon); text-decoration-color: rgba(122, 34, 48, .3); text-underline-offset: 2px; }
a:hover { text-decoration-color: var(--maroon); }
.muted { color: var(--ink-faint); }
.plus { color: var(--maroon); font-weight: 600; }

/* header */
.site-header { border-bottom: 1px solid var(--line); background: rgba(246, 243, 236, .8); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 10; }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.brand-mark { font-size: 1.4rem; color: var(--maroon); line-height: 1; }
.brand-text { font-family: "Fraunces", serif; font-size: 1.18rem; letter-spacing: -.01em; }
.header-nav { display: flex; align-items: center; gap: 20px; font-size: .92rem; }
.header-nav a { text-decoration: none; color: var(--ink-soft); }
.header-nav a:hover { color: var(--maroon); }

/* hero */
.hero { padding: 56px 0 26px; max-width: 720px; }
.hero h1 { font-family: "Fraunces", serif; font-weight: 600; font-size: clamp(2rem, 5vw, 3.1rem); line-height: 1.05; letter-spacing: -.02em; margin: 0 0 .5em; }
.hero h1 em { font-style: italic; color: var(--maroon); }
.lede { font-size: 1.08rem; color: var(--ink-soft); margin: 0; max-width: 60ch; }
.lede code { font-family: "JetBrains Mono", monospace; font-size: .9em; background: var(--paper-2); border: 1px solid var(--line); padding: .05em .35em; border-radius: 6px; }

/* composer */
.composer { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.field-label { display: block; font-size: .82rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-faint); margin-bottom: 8px; }
#description {
  width: 100%; resize: vertical; min-height: 110px;
  font-family: "Inter", sans-serif; font-size: 1.02rem; color: var(--ink);
  background: var(--paper); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px; outline: none; transition: border-color .15s, box-shadow .15s;
}
#description:focus { border-color: var(--maroon); box-shadow: 0 0 0 3px rgba(122, 34, 48, .12); }

.composer-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 14px; flex-wrap: wrap; }
.examples { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.examples-label { font-size: .85rem; color: var(--ink-faint); }
.chip { font: inherit; font-size: .85rem; color: var(--ink-soft); background: var(--paper); border: 1px solid var(--line); border-radius: 999px; padding: 5px 12px; cursor: pointer; transition: all .14s; }
.chip:hover { border-color: var(--maroon); color: var(--maroon); }

.primary-btn {
  font: inherit; font-weight: 600; color: #fff; background: var(--maroon);
  border: none; border-radius: 10px; padding: 11px 26px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 10px; transition: background .15s, transform .05s;
}
.primary-btn:hover { background: var(--maroon-deep); }
.primary-btn:active { transform: translateY(1px); }
.primary-btn:disabled { background: var(--ink-faint); cursor: progress; }
.primary-btn.small { padding: 8px 16px; }
.btn-spinner { width: 14px; height: 14px; border: 2px solid rgba(255,255,255,.4); border-top-color: #fff; border-radius: 50%; display: none; animation: spin .7s linear infinite; }
.primary-btn.loading .btn-spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

.ghost-btn { font: inherit; font-size: .9rem; color: var(--ink-soft); background: transparent; border: 1px solid var(--line); border-radius: 8px; padding: 7px 14px; cursor: pointer; transition: all .14s; }
.ghost-btn:hover { border-color: var(--maroon); color: var(--maroon); }

.status-line { min-height: 1.2em; margin: 14px 2px 0; font-size: .92rem; color: var(--ink-soft); }
.status-line.error { color: var(--bad); }

/* loop panel */
.loop-panel, .result-panel { margin-top: 30px; }
.panel-title { font-family: "Fraunces", serif; font-weight: 600; font-size: 1.3rem; letter-spacing: -.01em; margin: 0 0 16px; }
.loop-steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.loop-step {
  display: grid; grid-template-columns: 34px 1fr auto; align-items: center; gap: 12px;
  background: var(--paper-2); border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 16px; box-shadow: var(--shadow);
  animation: rise .25s ease both;
}
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.loop-step .idx { width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; background: var(--maroon); color: #fff; font-size: .8rem; font-weight: 600; font-family: "JetBrains Mono", monospace; }
.loop-step .body { min-width: 0; }
.loop-step .body .head { font-weight: 600; font-size: .95rem; }
.loop-step .body .model { font-family: "JetBrains Mono", monospace; font-size: .78rem; color: var(--ink-faint); }
.loop-step .checks { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.badge { font-family: "JetBrains Mono", monospace; font-size: .76rem; font-weight: 500; padding: 4px 10px; border-radius: 999px; display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.badge.pending { background: #efe9dc; color: var(--ink-faint); }
.badge.ok { background: rgba(47, 125, 79, .12); color: var(--ok); }
.badge.bad { background: rgba(178, 60, 60, .12); color: var(--bad); }
.badge .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.step-note { grid-column: 2 / -1; font-size: .85rem; color: var(--ink-soft); font-family: "JetBrains Mono", monospace; white-space: pre-wrap; word-break: break-word; max-height: 8.5em; overflow: auto; background: var(--paper); border-radius: 8px; padding: 8px 10px; margin-top: 4px; }

/* result */
.result-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.result-stats { display: flex; gap: 16px; font-size: .85rem; color: var(--ink-soft); font-family: "JetBrains Mono", monospace; }
.result-stats b { color: var(--ink); font-weight: 600; }
.result-panel.success .panel-title::after { content: "✓ verified"; margin-left: 12px; font-family: "JetBrains Mono", monospace; font-size: .8rem; color: var(--ok); background: rgba(47,125,79,.12); padding: 3px 10px; border-radius: 999px; vertical-align: middle; }
.result-panel.failed .panel-title::after { content: "best effort"; margin-left: 12px; font-family: "JetBrains Mono", monospace; font-size: .8rem; color: var(--bad); background: rgba(178,60,60,.12); padding: 3px 10px; border-radius: 999px; vertical-align: middle; }

.artifacts { display: flex; flex-direction: column; gap: 18px; margin-top: 18px; }
.artifact { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
.artifact-head { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; background: var(--paper-2); border-bottom: 1px solid var(--line); }
.artifact-name { font-family: "JetBrains Mono", monospace; font-size: .88rem; font-weight: 500; }
.artifact-actions { display: flex; gap: 8px; }
.icon-btn { font: inherit; font-size: .8rem; color: var(--ink-soft); background: var(--paper); border: 1px solid var(--line); border-radius: 7px; padding: 5px 11px; cursor: pointer; transition: all .14s; }
.icon-btn:hover { border-color: var(--maroon); color: var(--maroon); }
.artifact pre { margin: 0; padding: 16px; background: var(--code-bg); color: var(--code-ink); font-family: "JetBrains Mono", monospace; font-size: .85rem; line-height: 1.6; overflow-x: auto; max-height: 460px; }
.tok-kw { color: #e3a86b; } .tok-op { color: #8fb7e0; } .tok-com { color: #7f8a7a; font-style: italic; }

/* footer */
.site-footer { margin-top: 64px; border-top: 1px solid var(--line); padding: 24px 0 40px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: .85rem; color: var(--ink-soft); }

/* settings dialog */
.settings-dialog { border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; max-width: 420px; box-shadow: var(--shadow); color: var(--ink); }
.settings-dialog::backdrop { background: rgba(26, 23, 20, .35); backdrop-filter: blur(2px); }
.settings-dialog h3 { font-family: "Fraunces", serif; margin: 0 0 8px; }
.settings-dialog input { width: 100%; font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 9px; margin-top: 14px; }
.settings-dialog input:focus { outline: none; border-color: var(--maroon); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 18px; }

@media (max-width: 620px) {
  .hero { padding-top: 36px; }
  .composer-row { flex-direction: column; align-items: stretch; }
  .primary-btn { justify-content: center; }
  .loop-step { grid-template-columns: 28px 1fr; }
  .loop-step .checks { grid-column: 2; justify-content: flex-start; margin-top: 4px; }
}