/* ── Homepage layout ──────────────────────────────── */
section { border-top: 1px solid var(--border); }

/* ── Hero ─────────────────────────────────────────── */
.hero {
  border: none;
  padding: var(--section-gap) 0;
}

.hero h1 {
  font-size: clamp(30px, 5.5vw, 50px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.035em;
  margin-bottom: 20px;
  color: var(--text);
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-sub {
  font-size: 17px;
  color: var(--text-dim);
  line-height: 1.65;
  max-width: 520px;
  margin-bottom: 40px;
}

.ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.btn {
  font-family: var(--mono);
  font-size: 12.5px;
  padding: 10px 20px;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-block;
  border: none;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
}
.btn-primary:hover { opacity: 0.85; }

.btn-ghost {
  background: none;
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--text-dim); color: var(--text); }

/* ── Principle ────────────────────────────────────── */
.principle { padding: var(--section-gap) 0; }

.principle-headline {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  color: var(--text);
}

.principle-body {
  font-size: 15.5px;
  color: var(--text-dim);
  line-height: 1.75;
  max-width: 600px;
}

.principle-body p + p { margin-top: 16px; }

/* ── Pillars ──────────────────────────────────────── */
.pillars { padding: var(--section-gap) 0; }

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.pillar {
  background: var(--bg);
  padding: 28px 24px;
}

.pillar-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--accent);
  border: 1px solid var(--accent-border);
  padding: 3px 8px;
  display: inline-block;
  margin-bottom: 16px;
  background: var(--accent-dim);
}

.pillar h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

.pillar p {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ── Featured experiment card ─────────────────────── */
.experiment-featured { padding: var(--section-gap) 0; }

.exp-card {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  background: var(--surface);
}

.exp-card-header { padding: 28px 28px 0; }

.exp-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.exp-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dimmer);
}

.exp-tags { display: flex; gap: 6px; flex-wrap: wrap; }

.exp-date {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dimmer);
  margin-left: auto;
}

.exp-title {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.exp-problem {
  font-size: 14px;
  color: var(--text-dim);
  line-height: 1.65;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-dim);
}

.exp-code {
  background: #0e0e18;
  padding: 20px 28px;
  overflow-x: auto;
}

.exp-code pre {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* Syntax colours for homepage snippet */
.c-method  { color: #7dd3fc; }
.c-key     { color: #a5b4fc; }
.c-val     { color: #86efac; }
.c-comment { color: #444; }

.exp-card-footer {
  padding: 20px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-dim);
  flex-wrap: wrap;
  gap: 12px;
}

.exp-result {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
}

.exp-result span { color: var(--green); }

.exp-link {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  transition: opacity 0.15s;
}
.exp-link:hover { opacity: 0.7; }

/* ── Live demo ────────────────────────────────────── */
.live-demo { padding: var(--section-gap) 0; }

.demo-intro {
  font-size: 15px;
  color: var(--text-dim);
  margin-bottom: 32px;
  max-width: 480px;
  line-height: 1.65;
}

.demo-form {
  display: flex;
  margin-bottom: 24px;
  max-width: 440px;
}

.demo-input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-right: none;
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  padding: 11px 16px;
  outline: none;
  transition: border-color 0.15s;
  -webkit-appearance: none;
}

.demo-input::placeholder { color: var(--text-dimmer); }
.demo-input:focus { border-color: var(--accent); }

.demo-btn {
  font-family: var(--mono);
  font-size: 12px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 11px 20px;
  cursor: pointer;
  white-space: nowrap;
  font-weight: 500;
  transition: opacity 0.15s;
  flex-shrink: 0;
}
.demo-btn:hover:not(:disabled) { opacity: 0.85; }
.demo-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.demo-status {
  font-family: var(--mono);
  font-size: 12px;
  min-height: 18px;
  margin-bottom: 20px;
  color: var(--text-dimmer);
}
.demo-status.ok  { color: var(--green); }
.demo-status.err { color: var(--red); }

.demo-curl {
  display: none;
  background: #0e0e18;
  border: 1px solid var(--border);
  padding: 20px 24px;
  max-width: 560px;
}
.demo-curl.visible { display: block; }

.demo-curl-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--text-dimmer);
  margin-bottom: 12px;
}

.demo-curl pre {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-dim);
  white-space: pre-wrap;
  word-break: break-all;
}

.demo-note {
  font-size: 12px;
  color: var(--text-dimmer);
  margin-top: 16px;
  font-family: var(--mono);
}

/* ── About micro ──────────────────────────────────── */
.about-micro { padding: var(--section-gap) 0; }

.about-micro p {
  font-size: 15.5px;
  color: var(--text-dim);
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 24px;
}

.about-micro p strong {
  color: var(--text);
  font-weight: 600;
}

.about-tagline {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dimmer);
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}

.about-link {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--accent);
  transition: opacity 0.15s;
}
.about-link:hover { opacity: 0.7; }

/* ── Responsive: homepage ─────────────────────────── */
@media (max-width: 600px) {
  .pillar-grid { grid-template-columns: 1fr; }
  .exp-date { display: none; }
  .exp-card-footer { flex-direction: column; align-items: flex-start; }
  .demo-form { flex-direction: column; max-width: 100%; }
  .demo-input { border-right: 1px solid var(--border); border-bottom: none; }
  .demo-btn { width: 100%; }
}