*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: #f1f5f9;
  color: #0f172a;
  min-height: 100vh;
}

/* ── Nav ─────────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: #fff;
  border-bottom: 1.5px solid #e2e8f0;
  padding: .875rem 2rem;
  flex-wrap: wrap;
}
.nav__back { text-decoration: none; color: #2563eb; font-weight: 600; font-size: .9375rem; }
.nav__links { display: flex; gap: 1.5rem; margin-left: auto; flex-wrap: wrap; }
.nav__links a { text-decoration: none; color: #475569; font-size: .9375rem; transition: color .15s; }
.nav__links a:hover { color: #2563eb; }

/* ── Page ─────────────────────────────────────────────────── */
.page { max-width: 960px; margin: 0 auto; padding: 3rem 1.5rem 6rem; display: flex; flex-direction: column; gap: 4rem; }

.section { display: flex; flex-direction: column; gap: 1.5rem; }
.section__tag { display: inline-block; background: #eff6ff; color: #2563eb; font-size: .8125rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; border-radius: 999px; padding: .25rem .875rem; width: fit-content; }
.section h1 { font-size: 2rem; font-weight: 800; letter-spacing: -.02em; line-height: 1.2; }
.section h2 { font-size: 1.5rem; font-weight: 800; letter-spacing: -.01em; }
.section__lead { color: #475569; font-size: 1.0625rem; max-width: 680px; line-height: 1.6; }

/* ── Capture grid ─────────────────────────────────────────── */
.capture-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 680px) { .capture-grid { grid-template-columns: 1fr; } }

.capture-col {
  border-radius: 12px;
  padding: 1.25rem 1.375rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.capture-col--yes { background: #f0fdf4; border: 1.5px solid #bbf7d0; }
.capture-col--no  { background: #fff7ed; border: 1.5px solid #fed7aa; }

.capture-col__head {
  font-size: .8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.capture-col--yes .capture-col__head { color: #166534; }
.capture-col--no  .capture-col__head { color: #9a3412; }

.capture-list { list-style: none; display: flex; flex-direction: column; gap: .75rem; font-size: .9375rem; line-height: 1.5; }
.capture-list li { display: flex; gap: .625rem; align-items: flex-start; }

.tick { color: #16a34a; font-weight: 700; flex-shrink: 0; margin-top: .05rem; }
.cross { color: #ea580c; font-weight: 700; flex-shrink: 0; margin-top: .05rem; }

.capture-list strong { font-weight: 700; }

/* ── Demo layout ─────────────────────────────────────────── */
.demo-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}
@media (max-width: 700px) { .demo-layout { grid-template-columns: 1fr; } }

/* ── Task app ────────────────────────────────────────────── */
.task-app-wrap {
  display: flex;
  flex-direction: column;
}
.task-app {
  background: #fff;
  border: 1.5px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.25rem;
}
.task-input-row { display: flex; gap: .625rem; margin-bottom: .5rem; }
.task-input {
  flex: 1;
  padding: .5rem .75rem;
  border: 1.5px solid #e2e8f0;
  border-radius: 8px;
  font-size: .9375rem;
  outline: none;
  transition: border-color .18s;
}
.task-input:focus { border-color: #2563eb; }
.task-error {
  display: none;
  color: #dc2626;
  font-size: .8125rem;
  margin-bottom: .75rem;
  padding: .375rem .625rem;
  background: #fef2f2;
  border-radius: 6px;
  border: 1px solid #fecaca;
}
.task-list { list-style: none; display: flex; flex-direction: column; gap: .5rem; min-height: 2rem; }
.task-item { display: flex; align-items: center; gap: .625rem; padding: .5rem .625rem; border-radius: 8px; background: #f8fafc; transition: background .15s; }
.task-item--done .task-text { text-decoration: line-through; color: #94a3b8; }
.task-cb { cursor: pointer; width: 1rem; height: 1rem; accent-color: #2563eb; }
.task-text { flex: 1; font-size: .9375rem; }
.task-del-wrap { position: relative; display: inline-flex; }
.task-del { background: none; border: none; cursor: pointer; color: #cbd5e1; font-size: .875rem; padding: 0 .25rem; transition: color .15s; }
.task-del:hover { color: #ef4444; }
.task-del-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 4px;
  padding: 4px 8px;
  background: #1e293b;
  color: #e2e8f0;
  font-size: 0.75rem;
  border-radius: 4px;
  white-space: nowrap;
  visibility: hidden;
  opacity: 0;
  transition: visibility 0.15s, opacity 0.15s;
  pointer-events: none;
}
.task-del-wrap:hover .task-del-tooltip {
  visibility: visible;
  opacity: 1;
}
.task-add-btn:hover { opacity: 0.9; filter: brightness(1.05); }
.task-empty { font-size: .875rem; color: #94a3b8; margin-top: .5rem; }

/* ── Dev Panel ───────────────────────────────────────────── */
.dev-panel {
  background: #0f172a;
  border: 1.5px solid #1e293b;
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.dev-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 1rem;
  border-bottom: 1px solid #1e293b;
  background: #0a0f1e;
}
.dev-panel__title { color: #94a3b8; font-size: .8125rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.rec-indicator  { color: #ef4444; font-size: .8125rem; font-weight: 700; animation: blink 1s step-end infinite; }
.play-indicator { color: #22c55e; font-size: .8125rem; font-weight: 700; animation: blink .7s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.dev-panel__actions { display: flex; gap: .5rem; padding: .875rem 1rem; border-bottom: 1px solid #1e293b; flex-wrap: wrap; }

.dev-panel__tShowOk {
	display: flex;
	align-items: center;
	gap: .5rem;
	padding: .5rem 1rem;
	border-bottom: 1px solid #1e293b;
	font-size: .8125rem;
	color: #94a3b8;
	cursor: pointer;
}
.dev-panel__tShowOk input { cursor: pointer; accent-color: #2563eb; }
.dev-panel__tShowOk span { user-select: none; }

.action-log {
  padding: .75rem 1rem;
  min-height: 120px;
  max-height: 280px;
  overflow-y: auto;
  border-bottom: 1px solid #1e293b;
}
.log-empty { color: #475569; font-size: .8125rem; }
.log-item { display: flex; gap: .5rem; align-items: center; padding: .2rem 0; }
.log-type { background: #1e293b; color: #7dd3fc; font-size: .75rem; font-weight: 600; padding: .15rem .5rem; border-radius: 4px; min-width: 50px; text-align: center; }
.log-target { color: #94a3b8; font-size: .75rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 180px; }
.log-item--active { background: #1e293b; border-radius: 4px; }
.log-item--pass .log-type { background: #14532d; color: #86efac; }
.log-item--fail .log-type { background: #450a0a; color: #fca5a5; }

.export-btns { display: flex; gap: .5rem; padding: .75rem 1rem; border-bottom: 1px solid #1e293b; flex-wrap: wrap; }

.export-output { border-bottom: 1px solid #1e293b; }
.export-output__header { display: flex; align-items: center; justify-content: space-between; padding: .625rem 1rem; background: #0a0f1e; }
.export-output__header span { color: #94a3b8; font-size: .8125rem; font-weight: 600; }
#export-code { color: #a5f3fc; font-size: .71875rem; line-height: 1.6; padding: 1rem; overflow-x: auto; white-space: pre; max-height: 280px; overflow-y: auto; font-family: 'Fira Code', monospace; }

.ci-hint { padding: 1rem; display: flex; flex-direction: column; gap: .5rem; }
.ci-step { display: block; color: #86efac; font-size: .8125rem; font-family: monospace; }
.ci-note { color: #475569; font-size: .75rem; margin-top: .25rem; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  padding: .5rem 1rem;
  border: 1.5px solid transparent;
  border-radius: 8px;
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s, transform .1s;
  white-space: nowrap;
}
.btn:hover  { opacity: .85; }
.btn:active { transform: scale(.97); }
.btn:disabled { opacity: .4; cursor: not-allowed; transform: none; }
.btn--sm  { padding: .375rem .75rem; font-size: .8125rem; }
.btn--primary { background: #2563eb; color: #fff; }
.btn--outline { background: transparent; border-color: #334155; color: #94a3b8; }
.btn--outline:hover { border-color: #64748b; color: #e2e8f0; }
.btn--rec  { background: #ef4444; color: #fff; }
.btn--stop { background: #475569; color: #fff; }
.btn--play { background: #16a34a; color: #fff; }
.btn--test { background: #d97706; color: #fff; }
.btn--export    { background: #1e293b; color: #7dd3fc; border-color: #334155; }
.btn--export-pw { background: #1e293b; color: #86efac; border-color: #334155; }
.btn--copy { background: #334155; color: #e2e8f0; border-color: #475569; }

/* ── Replay highlight ────────────────────────────────────── */
.replay-highlight {
  outline: 2.5px solid #22c55e !important;
  outline-offset: 2px;
  border-radius: 4px;
  transition: outline .1s;
}

/* ── Assertions callout ──────────────────────────────────── */
.assertions-callout {
  background: #f8fafc;
  border: 1.5px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.25rem 1.375rem;
  margin-top: .5rem;
}
.assertions-callout__title {
  font-size: .9375rem;
  font-weight: 700;
  margin-bottom: .875rem;
  color: #0f172a;
}
.assert-item {
  display: flex;
  align-items: flex-start;
  gap: .625rem;
  padding: .375rem 0;
  font-size: .875rem;
  border-bottom: 1px solid #f1f5f9;
}
.assert-item:last-child { border-bottom: none; }
.assert-action { color: #7dd3fc; font-size: .75rem; font-weight: 600; background: #1e293b; padding: .15rem .5rem; border-radius: 4px; white-space: nowrap; }
.assert-text { color: #334155; font-family: 'Fira Code', monospace; font-size: .78125rem; }

/* ── Try overlay demo ─────────────────────────────────────── */
.overlay-demo {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.overlay-demo .btn { width: fit-content; }
.result-block {
  background: #f8fafc;
  border: 1.5px solid #e2e8f0;
  border-radius: 12px;
  padding: 1.25rem 1.375rem;
  font-size: .9375rem;
  line-height: 1.5;
}
.result-block__title {
  font-weight: 700;
  margin-bottom: .75rem;
  color: #0f172a;
}
.result-block p { margin: .25rem 0; }
.result-block p:first-of-type { margin-top: 0; }

/* ── Test function examples ────────────────────────────────── */
.test-example {
  margin-top: 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid #e2e8f0;
}
.test-example:last-child { border-bottom: none; }

.test-example__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: .75rem;
  color: #0f172a;
}

.test-example__code {
  font-family: 'Fira Code', monospace;
  font-size: .8125rem;
  line-height: 1.5;
  background: #1e293b;
  color: #e2e8f0;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  max-height: 180px;
  overflow-y: auto;
  margin-bottom: .75rem;
  white-space: pre;
}
.test-example__code code { background: none; padding: 0; }

.test-example__run {
  margin-bottom: .5rem;
}

.test-example__result {
  font-size: .875rem;
  padding: .5rem .75rem;
  border-radius: 6px;
  min-height: 1.5rem;
  border: 1px solid #e2e8f0;
  background: #f8fafc;
}
.test-example__result--pass {
  background: #f0fdf4;
  border-color: #bbf7d0;
  color: #166534;
}
.test-example__result--fail {
  background: #fef2f2;
  border-color: #fecaca;
  color: #991b1b;
}