/* ============================================================================
   Vectra · Apple-Silicon-style explainer
   ========================================================================== */

:root {
  --bg:           #000005;
  --bg-soft:      #0a0a12;
  --bg-elev:      #11131c;
  --line:         rgba(255,255,255,0.07);
  --line-strong:  rgba(255,255,255,0.16);
  --text:         #f3f4f8;
  --text-mute:    rgba(243,244,248,0.62);
  --text-dim:     rgba(243,244,248,0.36);
  --accent:       #8a6cff;
  --accent-2:     #21d4a3;
  --accent-soft:  rgba(138,108,255,0.12);
  --grad:         linear-gradient(135deg, #a78bff 0%, #21d4a3 100%);
  --grad-soft:    linear-gradient(135deg, rgba(167,139,255,0.4) 0%, rgba(33,212,163,0.3) 100%);
  --font:         'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'JetBrains Mono', SFMono-Regular, Consolas, monospace;
  --easing:       cubic-bezier(0.22, 0.61, 0.36, 1);
  --easing-out:   cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; -webkit-font-smoothing: antialiased; }
html, body { margin: 0; padding: 0; background: var(--bg); }
html { scroll-behavior: smooth; }
body {
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  font-feature-settings: 'ss01', 'ss02', 'cv11';
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
em { color: var(--text); background: var(--accent-soft); font-style: normal; padding: 0 4px; border-radius: 4px; }
code { font-family: var(--font-mono); font-size: 0.88em; color: var(--text-mute); background: rgba(255,255,255,0.04); padding: 1px 6px; border-radius: 4px; }

/* ===================================== Top nav ===================================== */
.topnav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 36px;
  background: rgba(0,0,5,0.6);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
  transition: background .25s var(--easing), border-color .25s var(--easing);
}
.topnav-brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 16px; letter-spacing: -0.01em; }
.topnav-mark { width: 18px; height: 18px; border-radius: 5px; background: var(--grad); box-shadow: 0 0 24px rgba(138,108,255,0.45); }
.topnav-links { display: flex; align-items: center; gap: 28px; }
.topnav-links a { color: var(--text-mute); font-size: 14px; font-weight: 500; transition: color .2s var(--easing); }
.topnav-links a:hover { color: var(--text); }
.topnav-cta {
  background: var(--text); color: #000 !important; font-weight: 600;
  padding: 8px 14px; border-radius: 999px;
  transition: transform .2s var(--easing), filter .2s var(--easing);
}
.topnav-cta:hover { transform: translateY(-1px); filter: brightness(1.08); }
@media (max-width: 720px) {
  .topnav-links a:not(.topnav-cta) { display: none; }
  .topnav { padding: 14px 18px; }
}

/* ===================================== Common section bits ===================================== */
.eyebrow {
  font-family: var(--font-mono); font-size: 12px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--accent-2); margin-bottom: 22px;
}
.bigline {
  font-size: clamp(40px, 6vw, 84px);
  line-height: 0.98; letter-spacing: -0.045em;
  font-weight: 700; margin: 0 0 28px;
  color: var(--text);
}
.bigline.centered { text-align: center; }
.muted { color: var(--text-mute); font-weight: 600; }
.grad {
  background: var(--grad);
  background-clip: text; -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.lede {
  font-size: clamp(17px, 1.35vw, 21px);
  line-height: 1.55; color: var(--text-mute);
  max-width: 600px; margin: 0 0 22px;
  font-weight: 400;
}
.lede.centered { text-align: center; margin-left: auto; margin-right: auto; }
.footnote-inline { color: var(--text-dim); font-size: 13px; max-width: 520px; }
.section-copy { padding: 0 6vw; max-width: 720px; }
.section-copy.single { max-width: 880px; margin: 0 auto; text-align: center; }
.cta-primary, .cta-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 24px; border-radius: 999px;
  font-weight: 600; font-size: 15px;
  transition: transform .2s var(--easing), filter .2s var(--easing), background .2s var(--easing);
}
.cta-primary {
  background: var(--text); color: #000 !important;
  box-shadow: 0 14px 40px rgba(243,244,248,0.18);
}
.cta-primary:hover { transform: translateY(-2px); filter: brightness(1.04); }
.cta-secondary {
  background: transparent; color: var(--text-mute);
  border: 1px solid var(--line-strong);
}
.cta-secondary:hover { color: var(--text); border-color: var(--text-mute); }
.cta-arrow { transition: transform .25s var(--easing); }
.cta-primary:hover .cta-arrow, .cta-secondary:hover .cta-arrow { transform: translateX(4px); }

/* ===================================== Hero ===================================== */
.hero {
  position: relative;
  min-height: 100vh; padding: 14vh 6vw 8vh;
  display: flex; flex-direction: column; justify-content: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(900px 500px at 75% -10%, rgba(138,108,255,0.18), transparent 60%),
    radial-gradient(700px 400px at -10% 30%, rgba(33,212,163,0.10), transparent 65%),
    radial-gradient(1000px 600px at 50% 110%, rgba(138,108,255,0.08), transparent 60%);
}
.hero-inner { position: relative; max-width: 1100px; margin: 0 auto; width: 100%; }
.hero-eyebrow {
  font-family: var(--font-mono); font-size: 13px;
  text-transform: uppercase; letter-spacing: 0.2em;
  color: var(--accent-2);
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 30px;
}
.hero-eyebrow::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-2); box-shadow: 0 0 12px var(--accent-2);
  animation: heroPulse 2.4s ease-in-out infinite;
}
@keyframes heroPulse { 0%,100%{opacity:1} 50%{opacity:0.4} }
.hero-headline {
  font-size: clamp(48px, 8vw, 120px);
  line-height: 0.96; letter-spacing: -0.05em;
  font-weight: 700; margin: 0 0 32px;
}
.hero-sub {
  font-size: clamp(17px, 1.45vw, 23px);
  line-height: 1.5; color: var(--text-mute);
  max-width: 720px; margin: 0 0 50px;
  font-weight: 400;
}
.hero-stats {
  display: flex; align-items: center; gap: 28px;
  margin-bottom: 50px; flex-wrap: wrap;
}
.hstat { display: flex; flex-direction: column; gap: 4px; }
.hstat-num {
  font-family: var(--font-mono); font-size: 26px; font-weight: 500;
  color: var(--text); font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.hstat-lbl { font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.12em; }
.hstat-rule { width: 1px; height: 28px; background: var(--line); }
@media (max-width: 720px) { .hstat-rule { display: none; } }
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.scroll-cue {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: var(--text-dim); font-size: 11px;
  text-transform: uppercase; letter-spacing: 0.2em;
}
.scroll-line {
  width: 1px; height: 32px; background: linear-gradient(to bottom, var(--text-mute) 0%, transparent 100%);
  animation: scrollDrop 2s ease-in-out infinite;
}
@keyframes scrollDrop {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===================================== Problem ===================================== */
.problem {
  position: relative;
  min-height: 110vh;
  padding: 18vh 0;
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; gap: 6vw;
}
@media (max-width: 980px) { .problem { grid-template-columns: 1fr; padding: 14vh 6vw; } }

.problem-doc-field {
  position: relative; height: 70vh;
  min-height: 480px;
}
.doc {
  position: absolute;
  width: 64px; height: 80px;
  left: var(--x); top: var(--y);
  transform: rotate(var(--r));
  border: 1px solid var(--line-strong);
  background: var(--bg-elev);
  border-radius: 6px;
  box-shadow: 0 12px 24px rgba(0,0,0,0.4);
  opacity: 0.85;
  transition: transform 1.2s var(--easing-out), opacity 1s var(--easing-out);
  will-change: transform;
}
.doc::before {
  content: ''; position: absolute;
  top: 12px; left: 10px; right: 10px; height: 2px;
  background: var(--line-strong); border-radius: 2px;
  box-shadow:
    0 6px 0 0 var(--line),
    0 12px 0 0 var(--line),
    0 18px 0 0 var(--line),
    0 24px 0 0 var(--line);
}
.doc[data-kind="email"]::after {
  content: '@'; position: absolute; top: 4px; right: 6px;
  font-family: var(--font-mono); font-size: 10px; color: var(--accent);
}
.doc[data-kind="pdf"]::after {
  content: 'PDF'; position: absolute; top: 4px; right: 4px;
  font-family: var(--font-mono); font-size: 8px; color: #ff6b6b; font-weight: 600;
}
.doc[data-kind="sheet"]::after {
  content: ''; position: absolute; top: 8px; right: 6px;
  width: 14px; height: 10px; background: rgba(33,212,163,0.5); border-radius: 2px;
}
.doc[data-kind="thread"]::after {
  content: ''; position: absolute; top: 8px; right: 6px;
  width: 12px; height: 12px; border-radius: 50%; border: 1.5px solid var(--accent);
}
.doc[data-kind="memo"]::after {
  content: 'M'; position: absolute; top: 4px; right: 5px;
  font-family: var(--font-mono); font-size: 10px; color: var(--text-mute);
}
.problem.converged .doc {
  --tx: calc(50% - var(--x));
  --ty: calc(50% - var(--y));
  transform: translate(var(--tx), var(--ty)) rotate(0deg) scale(0.6);
  opacity: 0;
}

/* ===================================== Pipeline (sticky scroll) ===================================== */
.pipeline-section { position: relative; }
.pipeline-track {
  position: relative;
  display: grid; grid-template-columns: 1fr 1fr;
}
@media (max-width: 980px) { .pipeline-track { grid-template-columns: 1fr; } }
.pipeline-pin {
  position: sticky; top: 0; height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 0 4vw;
  border-right: 1px solid var(--line);
  background: var(--bg-soft);
}
@media (max-width: 980px) { .pipeline-pin { position: relative; height: 60vh; border-right: none; border-bottom: 1px solid var(--line); } }
.pipeline-diagram {
  display: flex; flex-direction: column; gap: 14px;
  width: 100%; max-width: 360px;
}
.stage {
  display: grid; grid-template-columns: 56px 1fr;
  align-items: center; column-gap: 18px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,0.02);
  transition: all .5s var(--easing-out);
}
.stage-num {
  font-family: var(--font-mono); font-weight: 500;
  font-size: 18px; color: var(--text-dim);
  transition: color .5s var(--easing-out);
}
.stage-label {
  font-size: 18px; font-weight: 600; letter-spacing: -0.01em;
  color: var(--text-mute);
  transition: color .5s var(--easing-out);
}
.stage-detail {
  grid-column: 2;
  font-size: 12.5px; color: var(--text-dim);
  margin-top: 2px;
  transition: color .5s var(--easing-out);
}
.stage.active {
  background: var(--accent-soft);
  border-color: rgba(138,108,255,0.4);
  box-shadow: 0 24px 60px rgba(138,108,255,0.15);
}
.stage.active .stage-num { color: var(--accent-2); }
.stage.active .stage-label { color: var(--text); }
.stage.active .stage-detail { color: var(--text-mute); }
.stage-line {
  width: 2px; height: 12px; background: var(--line);
  margin-left: 48px;
  transition: background .5s var(--easing-out);
}
.stage.active + .stage-line { background: var(--accent); }

.pipeline-copy {
  padding: 18vh 6vw 18vh;
  display: flex; flex-direction: column; gap: 0;
}
.stage-block {
  min-height: 80vh;
  padding: 6vh 0;
  display: flex; flex-direction: column; justify-content: center;
  border-top: 1px solid var(--line);
  opacity: 0.35;
  transition: opacity .5s var(--easing-out);
}
.stage-block:first-of-type { border-top: none; }
.stage-block.active { opacity: 1; }
.stage-tag {
  font-family: var(--font-mono); font-size: 12px;
  color: var(--accent-2); letter-spacing: 0.16em; text-transform: uppercase;
  margin-bottom: 18px;
}
.stage-block h3 {
  font-size: clamp(26px, 2.4vw, 38px);
  line-height: 1.15; letter-spacing: -0.02em;
  font-weight: 600; margin: 0 0 22px; color: var(--text);
}
.stage-block p {
  font-size: 17px; line-height: 1.6;
  color: var(--text-mute); margin: 0 0 26px;
  max-width: 540px;
}
.kv {
  display: grid; grid-template-columns: 90px 1fr;
  gap: 16px; align-items: baseline;
  padding: 10px 0;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
}
.kv:first-of-type { margin-top: 8px; }
.kv span:first-child {
  font-family: var(--font-mono); color: var(--text-dim);
  text-transform: uppercase; font-size: 10.5px; letter-spacing: 0.15em;
}
.kv code {
  background: none; padding: 0; color: var(--text-mute);
  font-size: 13px; line-height: 1.5;
}

/* ===================================== Retrieval RRF viz ===================================== */
.retrieval {
  padding: 18vh 6vw;
  display: grid; grid-template-columns: 1fr 1fr; gap: 6vw;
  align-items: center;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
@media (max-width: 980px) { .retrieval { grid-template-columns: 1fr; gap: 8vh; padding: 14vh 6vw; } }
.formula {
  font-family: var(--font-mono); display: flex; flex-direction: column; gap: 6px;
  margin-top: 28px; padding: 18px 22px;
  background: rgba(255,255,255,0.02); border: 1px solid var(--line); border-radius: 10px;
}
.formula-eq { font-size: 15px; color: var(--text); }
.formula-eq sub { font-size: 0.7em; vertical-align: sub; }
.formula-cap { font-size: 11.5px; color: var(--text-dim); }
.rrf-viz {
  position: relative;
  display: grid; grid-template-rows: auto auto auto auto;
  gap: 24px; padding: 32px;
  background: rgba(255,255,255,0.015);
  border: 1px solid var(--line); border-radius: 18px;
  max-width: 540px; margin: 0 auto; width: 100%;
}
.rrf-query {
  display: flex; flex-direction: column; gap: 6px;
  padding: 14px 18px; border-radius: 10px;
  background: var(--accent-soft); border: 1px solid rgba(138,108,255,0.25);
}
.rrf-q-label { font-family: var(--font-mono); font-size: 10.5px; color: var(--accent-2); letter-spacing: 0.18em; text-transform: uppercase; }
.rrf-q-text { font-family: var(--font-mono); font-size: 13.5px; color: var(--text); }
.rrf-lanes { display: flex; flex-direction: column; gap: 8px; }
.rrf-lane {
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px;
  padding: 11px 16px; border-radius: 8px;
  background: rgba(255,255,255,0.025); border: 1px solid var(--line);
  font-size: 13px; transition: all .4s var(--easing-out);
}
.rrf-lane.firing {
  background: rgba(138,108,255,0.06); border-color: rgba(138,108,255,0.3);
  box-shadow: 0 0 0 1px rgba(138,108,255,0.15), 0 10px 24px rgba(138,108,255,0.08);
}
.lane-name { color: var(--text-mute); font-family: var(--font-mono); font-size: 12.5px; }
.rrf-lane.firing .lane-name { color: var(--text); }
.lane-w { font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); }
.rrf-fuse {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 6px 0;
}
.fuse-circle {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 30px rgba(138,108,255,0.45);
  animation: fusePulse 2.6s ease-in-out infinite;
}
@keyframes fusePulse { 0%,100%{transform:scale(1);opacity:1} 50%{transform:scale(1.4);opacity:0.7} }
.fuse-label {
  font-family: var(--font-mono); font-size: 11px; color: var(--accent-2);
  letter-spacing: 0.18em; text-transform: uppercase;
}
.rrf-result { display: flex; flex-direction: column; gap: 6px; }
.rrf-r {
  display: grid; grid-template-columns: 24px 1fr auto; align-items: center; gap: 12px;
  padding: 9px 14px; border-radius: 8px;
  background: rgba(33,212,163,0.05); border: 1px solid rgba(33,212,163,0.15);
  font-size: 12.5px;
}
.rrf-r-rank { font-family: var(--font-mono); color: var(--accent-2); font-weight: 600; }
.rrf-r-file { color: var(--text); font-family: var(--font-mono); }
.rrf-r-type {
  font-family: var(--font-mono); font-size: 10.5px;
  padding: 2px 7px; border-radius: 4px;
  background: var(--accent-soft); color: var(--accent);
}

/* ===================================== Embedding PCA ===================================== */
.embedding {
  padding: 18vh 6vw;
  display: grid; grid-template-columns: 1fr 1fr; gap: 6vw;
  align-items: center; min-height: 100vh;
}
@media (max-width: 980px) { .embedding { grid-template-columns: 1fr; gap: 8vh; padding: 14vh 6vw; } }
.embedding-viz {
  position: relative;
  aspect-ratio: 1; max-width: 560px; width: 100%; margin: 0 auto;
}
#pca-canvas {
  width: 100%; height: 100%;
  background: radial-gradient(circle at 50% 50%, rgba(138,108,255,0.05), transparent 65%);
  border: 1px solid var(--line);
  border-radius: 18px;
  cursor: crosshair;
}
.embedding-legend {
  position: absolute; top: 16px; left: 16px;
  display: flex; flex-direction: column; gap: 5px;
  background: rgba(0,0,5,0.5); backdrop-filter: blur(8px);
  padding: 12px 14px; border-radius: 10px;
  border: 1px solid var(--line);
}
.legend-row { display: flex; align-items: center; gap: 8px; font-size: 11.5px; color: var(--text-mute); font-family: var(--font-mono); }
.legend-dot { width: 8px; height: 8px; border-radius: 50%; }
.embedding-tooltip {
  position: absolute; pointer-events: none;
  background: rgba(0,0,5,0.92); backdrop-filter: blur(10px);
  border: 1px solid var(--line-strong); border-radius: 8px;
  padding: 10px 14px;
  font-size: 12.5px; color: var(--text);
  max-width: 260px;
  opacity: 0; transition: opacity .15s var(--easing);
  z-index: 10;
}
.embedding-tooltip.show { opacity: 1; }
.embedding-tooltip .tt-file { font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); margin-bottom: 4px; }
.embedding-tooltip .tt-type {
  display: inline-block; padding: 1px 6px; border-radius: 4px;
  background: var(--accent-soft); color: var(--accent);
  font-family: var(--font-mono); font-size: 10px;
  margin-bottom: 6px;
}
.embedding-tooltip .tt-summary { color: var(--text-mute); line-height: 1.45; }

/* ===================================== Graph ===================================== */
.graph {
  padding: 18vh 6vw;
  display: grid; grid-template-columns: 1fr 1fr; gap: 6vw;
  align-items: center; min-height: 100vh;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
@media (max-width: 980px) { .graph { grid-template-columns: 1fr; gap: 8vh; padding: 14vh 6vw; } }
.graph-viz {
  position: relative; aspect-ratio: 1;
  max-width: 560px; width: 100%; margin: 0 auto;
}
#graph-svg {
  width: 100%; height: 100%;
  background: radial-gradient(circle at 50% 50%, rgba(33,212,163,0.04), transparent 60%);
  border: 1px solid var(--line);
  border-radius: 18px;
}
.gnode { transition: r .25s var(--easing); }
.gnode:hover { r: 9; }
.gedge { stroke: var(--line-strong); stroke-width: 1; opacity: 0.55; transition: opacity .25s var(--easing); }
.gnode-label { font-family: var(--font-mono); font-size: 9px; fill: var(--text-mute); pointer-events: none; opacity: 0; transition: opacity .2s var(--easing); }
.gnode:hover + .gnode-label, .gnode.hover + .gnode-label { opacity: 1; }

/* ===================================== Try it section ===================================== */
.try-section {
  padding: 18vh 6vw;
  background: var(--bg);
  position: relative;
}
.try-inner { max-width: 1080px; margin: 0 auto; }
.try-form {
  display: flex; gap: 10px; margin: 36px auto 18px;
  max-width: 720px;
  padding: 7px;
  border: 1px solid var(--line-strong);
  background: var(--bg-elev);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.4);
  transition: border-color .25s var(--easing), box-shadow .25s var(--easing);
}
.try-form:focus-within {
  border-color: rgba(138,108,255,0.5);
  box-shadow: 0 24px 60px rgba(0,0,0,0.4), 0 0 0 4px rgba(138,108,255,0.1);
}
#ask-input {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--text); font: inherit; font-size: 16px;
  padding: 14px 18px;
}
#ask-input::placeholder { color: var(--text-dim); }
#ask-btn {
  background: var(--grad); color: #000; border: none;
  font: inherit; font-weight: 600; font-size: 14.5px;
  padding: 0 22px; border-radius: 12px; cursor: pointer;
  transition: transform .2s var(--easing), filter .2s var(--easing);
}
#ask-btn:hover { transform: translateY(-1px); filter: brightness(1.06); }
#ask-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.try-examples {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px;
  max-width: 800px; margin: 0 auto 40px;
}
.try-chip {
  font-size: 13px; color: var(--text-mute);
  background: rgba(255,255,255,0.025); border: 1px solid var(--line);
  padding: 8px 14px; border-radius: 999px; cursor: pointer;
  transition: all .2s var(--easing);
}
.try-chip:hover { color: var(--text); border-color: var(--line-strong); background: rgba(255,255,255,0.06); }

.try-loading {
  display: flex; align-items: center; justify-content: center; gap: 14px;
  margin: 40px auto; color: var(--text-mute);
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.05em;
}
.try-pulse {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  animation: tryPulse 1.4s ease-in-out infinite;
}
@keyframes tryPulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(138,108,255,0.6); }
  50% { box-shadow: 0 0 0 14px rgba(138,108,255,0); }
}

.try-result-grid {
  display: grid; grid-template-columns: 1.15fr 1fr; gap: 22px;
  margin-top: 14px;
}
@media (max-width: 880px) { .try-result-grid { grid-template-columns: 1fr; } }
.try-answer, .try-sources {
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: 16px;
  padding: 22px 24px;
}
.try-pane-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 14px;
  font-size: 14px; font-weight: 600; color: var(--text);
}
.try-pane-head .timing, .try-pane-head .hint {
  font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); font-weight: 400;
}
#try-answer-body { font-size: 15.5px; line-height: 1.65; color: var(--text); }
#try-answer-body p { margin: 0 0 10px; }
#try-answer-body sup.cite {
  vertical-align: super; font-size: 0.72em; cursor: pointer;
  color: var(--accent-2); font-family: var(--font-mono); font-weight: 600;
  padding: 0 2px;
}
#try-answer-body sup.cite:hover { color: var(--text); }
#try-sources-body {
  display: flex; flex-direction: column; gap: 8px;
  max-height: 540px; overflow-y: auto; padding-right: 4px;
}
.t-src {
  background: rgba(255,255,255,0.025); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 14px;
  cursor: pointer; transition: all .2s var(--easing);
}
.t-src:hover { border-color: var(--line-strong); background: rgba(255,255,255,0.05); }
.t-src.flash { box-shadow: 0 0 0 2px var(--accent), 0 0 30px rgba(138,108,255,0.3); }
.t-src-head { display: flex; gap: 8px; align-items: center; margin-bottom: 5px; flex-wrap: wrap; }
.t-src-idx {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  background: var(--accent-soft); color: var(--accent-2);
  padding: 1px 7px; border-radius: 999px;
}
.t-src-file { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-dim); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.t-src-score { font-family: var(--font-mono); font-size: 11px; color: var(--accent-2); }
.t-src-summary { color: var(--text-mute); font-size: 13px; line-height: 1.5; }
.t-src-badges { display: flex; gap: 5px; flex-wrap: wrap; margin: 5px 0; }
.t-badge {
  font-family: var(--font-mono); font-size: 10px;
  padding: 1px 6px; border-radius: 4px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--line);
  color: var(--text-mute);
}
.t-badge.k { background: var(--accent-soft); color: var(--accent); border-color: rgba(138,108,255,0.2); }
.t-badge.s { background: rgba(33,212,163,0.1); color: var(--accent-2); border-color: rgba(33,212,163,0.18); }
.try-cta-row { display: flex; justify-content: center; margin-top: 40px; }

/* ===================================== Vectra 2.0 ===================================== */
.vectra2 {
  padding: 22vh 6vw 18vh;
  background: var(--bg);
  position: relative;
}
.vectra2::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(800px 400px at 50% 0%, rgba(138,108,255,0.1), transparent 60%);
}
.vectra2-cta-row {
  display: flex; gap: 14px; justify-content: center;
  margin-top: 50px; flex-wrap: wrap;
}

/* ===================================== Footer ===================================== */
.foot {
  border-top: 1px solid var(--line);
  padding: 30px 6vw;
}
.foot-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap;
}
.foot-brand { display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--text-mute); }
.foot-tag {
  font-family: var(--font-mono); font-size: 11px;
  padding: 1px 7px; border-radius: 4px;
  background: var(--accent-soft); color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.1em;
}
.foot-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; font-size: 12px; color: var(--text-dim); }
@media (max-width: 720px) { .foot-meta { align-items: flex-start; } }

/* ===================================== Reveal animation ===================================== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .9s var(--easing-out), transform .9s var(--easing-out); }
.reveal.in { opacity: 1; transform: none; }