/* ============================================================
   PyGX home — page-specific styles
   ============================================================ */

.grad {
  background: linear-gradient(100deg, var(--accent-bright), var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---- Hero ---- */
.hero { position: relative; overflow: hidden; padding-block: clamp(56px, 9vw, 110px) clamp(56px, 8vw, 96px); }
.hero-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(60% 70% at 78% 6%, var(--accent-soft), transparent 60%),
    radial-gradient(50% 60% at 8% 100%, var(--accent-soft), transparent 65%);
  -webkit-mask-image: linear-gradient(to bottom, #000, transparent);
  mask-image: linear-gradient(to bottom, #000, transparent);
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none; opacity: .5;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 0%, #000 10%, transparent 62%);
  mask-image: radial-gradient(120% 90% at 70% 0%, #000 10%, transparent 62%);
}
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.04fr 1fr; gap: 52px; align-items: center; }
.hero-copy h1 { font-size: clamp(2.2rem, min(5.6vw, 11.5cqw), 4.6rem); }
.hero-copy h1 .nowrap { white-space: nowrap; }
.hero-copy { container-type: inline-size; }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 32px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 30px; color: var(--faint); font-size: 0.86rem; font-family: var(--font-mono); }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-code { perspective: 1600px; }
.hero-code .code { transform: rotateY(-3deg) rotateX(1.5deg); transform-origin: left center; }

/* ---- Credibility strip ---- */
.strip { border-block: 1px solid var(--border); background: var(--bg-2); }
.strip-inner { display: flex; align-items: center; gap: 30px; padding-block: 18px; flex-wrap: wrap; }
.strip-label { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); }
.strip-items { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; color: var(--muted); font-size: 0.92rem; }
.strip-items strong { color: var(--text-strong); font-weight: 600; }
.strip-sep { width: 5px; height: 5px; border-radius: 50%; background: var(--border-strong); }

/* ---- Section heads ---- */
.sec-head { max-width: 62ch; }
.sec-head h2 { margin-top: 14px; }
.sec-head .lede { margin-top: 16px; }
.sec-head.center { margin-inline: auto; }

/* ---- Slider / capability stepper ---- */
.cap {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-xl);
  box-shadow: var(--shadow-md); overflow: hidden; margin-top: 44px;
}
.cap-track { display: grid; grid-template-columns: repeat(6, 1fr); border-bottom: 1px solid var(--border); position: relative; }
.cap-step {
  position: relative; padding: 20px 14px 22px; text-align: center; background: transparent;
  border: 0; border-right: 1px solid var(--border); color: var(--muted); transition: color .2s, background .2s;
}
.cap-step:last-child { border-right: 0; }
.cap-step:hover { background: var(--surface-2); color: var(--text-strong); }
.cap-step .n { font-family: var(--font-mono); font-size: 0.7rem; color: var(--faint); display: block; margin-bottom: 7px; }
.cap-step .t { font-family: var(--font-display); font-weight: 600; font-size: 0.98rem; }
.cap-step.on { color: var(--accent); background: var(--accent-soft); }
.cap-step.on .n { color: var(--accent); }
.cap-rail { position: absolute; left: 0; bottom: -1px; height: 2px; background: var(--accent); transition: transform .3s cubic-bezier(.3,.7,.2,1), width .3s; }
.cap-body { display: grid; grid-template-columns: 1fr 1.2fr; gap: 0; }
.cap-info { padding: 30px 32px; display: flex; flex-direction: column; }
.cap-info .lbl { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); }
.cap-info h3 { margin: 12px 0 10px; font-size: 1.5rem; }
.cap-info p { color: var(--muted); font-size: 0.97rem; }
.cap-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 22px; }
.cap-code { border-left: 1px solid var(--border); background: var(--code-bg); }
.cap-code .code { box-shadow: none; border: 0; border-radius: 0; height: 100%; }
.cap-code pre { min-height: 230px; }
.cap-out {
  border-top: 1px solid oklch(1 0 0 / 0.07); padding: 12px 20px; font-family: var(--font-mono);
  font-size: 0.82rem; color: oklch(0.72 0.02 285); display: flex; align-items: center; gap: 10px;
}
.cap-out .ar { color: var(--accent-bright); }
.cap-out b { color: oklch(0.92 0.04 150); font-weight: 500; }
.cap-out.err b { color: oklch(0.78 0.13 25); }

/* ---- Feature cards (shared by features.html via home.css? no) ---- */
#feature-cards .card code, #feature-cards .ic { color: var(--accent); }

/* ---- Search-space demo ---- */
.sd { display: grid; grid-template-columns: 1fr; gap: 18px; }
.sd-top {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 8px; box-shadow: var(--shadow-sm);
}
.sd-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 18px; }
@media (max-width: 860px) { .sd-grid { grid-template-columns: 1fr; } }

.sd-panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 24px; box-shadow: var(--shadow-sm);
}
.sd-panel h4 { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: .12em; text-transform: uppercase; color: var(--faint); font-weight: 500; margin-bottom: 18px; }

/* tree */
.tree { display: flex; flex-direction: column; gap: 0; }
.tree-root {
  display: inline-flex; align-self: flex-start; align-items: center; gap: 9px; padding: 9px 15px;
  background: var(--accent-soft); border: 1px solid var(--accent-line); border-radius: var(--r-md);
  font-family: var(--font-mono); font-weight: 500; color: var(--accent); margin-bottom: 4px;
}
.tree-branch { display: flex; flex-direction: column; gap: 14px; padding-left: 22px; margin-top: 14px; border-left: 2px solid var(--border); }
.tree-node { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; position: relative; }
.tree-node::before { content: ""; position: absolute; left: -22px; top: 50%; width: 18px; height: 2px; background: var(--border); }
.tree-field { font-family: var(--font-mono); font-size: 0.9rem; color: var(--text-strong); min-width: 96px; }
.tree-field .of { color: var(--faint); font-size: 0.78rem; }
.opts { display: flex; gap: 8px; flex-wrap: wrap; }
.opt {
  font-family: var(--font-mono); font-size: 0.88rem; font-weight: 500; padding: 7px 14px;
  border-radius: 9px; border: 1px solid var(--border-strong); background: var(--surface-2);
  color: var(--muted); transition: all .15s;
}
.opt:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.opt.sel { background: var(--accent); border-color: var(--accent); color: #fff; box-shadow: var(--shadow-sm); }
[data-theme="dark"] .opt.sel { color: oklch(0.16 0.012 285); }

.sd-controls { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--border); }
.sd-controls .btn { font-size: 0.88rem; padding: .6em 1.05em; }

/* materialized result */
.sd-result { display: flex; flex-direction: column; gap: 14px; }
.result-card {
  background: var(--code-bg); border-radius: var(--r-md); padding: 18px 20px; font-family: var(--font-mono);
  color: var(--code-fg); font-size: 0.9rem; line-height: 1.7; box-shadow: var(--shadow-sm);
}
.result-card .rk { color: var(--code-pg); }
.result-card .rv { color: var(--code-num); }
.dna { display: flex; align-items: center; gap: 12px; font-family: var(--font-mono); font-size: 0.82rem; color: var(--muted); }
.dna .pill { display: inline-flex; gap: 5px; }
.dna b { color: var(--accent); }

/* enumeration list */
.enum-list { display: flex; flex-direction: column; gap: 8px; }
.enum-row {
  display: flex; align-items: center; gap: 14px; padding: 11px 14px; border-radius: var(--r-sm);
  border: 1px solid var(--border); background: var(--surface-2); font-family: var(--font-mono);
  font-size: 0.86rem; color: var(--text); cursor: pointer; transition: all .14s;
}
.enum-row:hover { border-color: var(--accent-line); }
.enum-row.active { border-color: var(--accent); background: var(--accent-soft); }
.enum-row .idx { color: var(--faint); width: 26px; }
.enum-row .dnab { margin-left: auto; color: var(--accent); }
.enum-row .area-tag { color: var(--muted); }

/* ---- Performance ---- */
.perf-grid { display: grid; grid-template-columns: 0.92fr 1.15fr; gap: 48px; align-items: center; }
.perf-note { color: var(--muted); font-size: 0.98rem; margin-top: 16px; max-width: 52ch; }
.perf-note strong { color: var(--text-strong); }
.perf-table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 22px 24px; box-shadow: var(--shadow-md); overflow-x: auto; }
.perf-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.perf-table th { font-family: var(--font-mono); font-size: 0.72rem; font-weight: 500; letter-spacing: .04em; color: var(--faint); text-align: right; padding: 8px 10px; border-bottom: 1px solid var(--border-strong); white-space: nowrap; }
.perf-table th:first-child { text-align: left; text-transform: uppercase; letter-spacing: .1em; }
.perf-table td { padding: 10px; text-align: right; font-family: var(--font-mono); color: var(--muted); border-bottom: 1px solid var(--border); }
.perf-table td:first-child { text-align: left; font-family: var(--font-body); color: var(--text-strong); }
.perf-table tbody tr:last-child td { border-bottom: 0; }
.perf-table td.hi { color: var(--accent); font-weight: 700; background: var(--accent-soft); }
.perf-cap { margin-top: 14px; font-family: var(--font-mono); font-size: 0.74rem; color: var(--faint); }
@media (max-width: 900px) { .perf-grid { grid-template-columns: 1fr; gap: 28px; } }

/* ---- Background section ---- */
.bg-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; align-items: start; }
.bg-body p { color: var(--muted); font-size: 1.02rem; margin-bottom: 16px; max-width: 56ch; }
.bg-body strong { color: var(--text-strong); font-weight: 600; }
.cite { margin-top: 24px; background: var(--code-bg); border-radius: var(--r-md); overflow: hidden; box-shadow: var(--shadow-md); }
.cite-bar { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; border-bottom: 1px solid oklch(1 0 0 / 0.07); font-family: var(--font-mono); font-size: 0.74rem; color: oklch(0.7 0.02 285); }
.cite pre { margin: 0; padding: 16px 18px; overflow-x: auto; color: oklch(0.8 0.02 285); font-family: var(--font-mono); font-size: 0.8rem; line-height: 1.65; }

/* ---- CTA band ---- */
.cta-band { position: relative; overflow: hidden; border-top: 1px solid var(--border); background: var(--bg-2); padding-block: clamp(72px, 9vw, 110px); }
.cta-band::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(50% 90% at 50% 0%, var(--accent-soft), transparent 70%);
}
.cta-inner { position: relative; text-align: center; display: flex; flex-direction: column; align-items: center; }
.cta-inner h2 { font-size: clamp(2.2rem, 4.6vw, 3.4rem); }
.cta-inner .lede { margin-top: 16px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: center; margin-top: 32px; }

/* ---- Mobile menu ---- */
.mobile-menu { display: none; flex-direction: column; padding: 8px 28px 16px; gap: 2px; border-bottom: 1px solid var(--border); background: var(--bg); }
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 11px 6px; color: var(--text); border-bottom: 1px solid var(--border); font-size: 0.96rem; }
.mobile-menu a:last-child { border-bottom: 0; }

/* ---- responsive ---- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-code .code { transform: none; }
  .cap-body { grid-template-columns: 1fr; }
  .cap-code { border-left: 0; border-top: 1px solid var(--border); }
  .cap-track { grid-template-columns: repeat(3, 1fr); }
  .cap-step:nth-child(3n) { border-right: 0; }
  .bg-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 560px) {
  .cap-track { grid-template-columns: repeat(2, 1fr); }
}