/* ---------- design tokens ---------- */
:root {
  --bg:        #07090F;
  --bg-1:      #0B0F1A;
  --bg-2:      #0F1525;
  --surface:   #131A2E;
  --surface-2: #1A2240;
  --line:      rgba(255,255,255,0.07);
  --line-2:    rgba(255,255,255,0.12);

  --ink:       #EEF2FA;
  --ink-2:     #B6C0D6;
  --ink-3:     #7A8499;
  --ink-4:     #4E5670;

  --brand:     #3056D3;
  --brand-1:   #5B7CF5;
  --brand-2:   #1B3AA3;
  --brand-glow: rgba(91,124,245,0.55);

  --c-relevance: #5B7CF5; /* blue */
  --c-demand:    #F59E0B; /* amber */
  --c-recency:   #34D399; /* mint */
  --c-gap:       #F472B6; /* rose */
  --c-fit:       #67E8F9; /* cyan */

  --ok:    #34D399;
  --warn:  #FBBF24;
  --bad:   #FB7185;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;

  --container: 1200px;
  --gutter: 32px;

  --shadow-card: 0 30px 80px -20px rgba(0,0,0,0.6), 0 2px 0 rgba(255,255,255,0.04) inset;

  --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  --font-disp: 'Inter Tight', 'Inter', 'PingFang SC', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --font-cn:   'Inter Tight', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-feature-settings: 'cv11','ss01','ss03';
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.5;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
code, pre { font-family: var(--font-mono); }

::selection { background: var(--brand); color: white; }

/* ---------- shell ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
section { position: relative; }

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 80;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(7,9,15,0.72);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-disp);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 28px; height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--brand-1), var(--brand));
  box-shadow: 0 0 0 1px rgba(91,124,245,0.4), 0 8px 24px -8px var(--brand-glow);
  color: white;
  font-weight: 800;
  font-size: 14px;
}
.brand-mark::after { content: '✓'; }
.brand-tag {
  margin-left: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--ink-3);
  padding: 3px 7px;
  border-radius: 6px;
  border: 1px solid var(--line);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
  color: var(--ink-2);
}
.nav-links a { transition: color .15s ease; }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  font-size: 13px;
  background: rgba(255,255,255,0.03);
  transition: background .15s ease, transform .15s ease;
}
.nav-cta:hover { background: rgba(255,255,255,0.08); }
.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  font-size: 12px;
  font-family: var(--font-mono);
  background: rgba(255,255,255,0.02);
}
.lang-toggle button {
  padding: 4px 10px;
  border-radius: 999px;
  color: var(--ink-3);
  transition: all .15s ease;
}
.lang-toggle button.active {
  background: var(--ink);
  color: var(--bg);
}
@media (max-width: 720px) {
  .nav-links a:not(.nav-cta) { display: none; }
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: 110px 0 90px;
  overflow: hidden;
  isolation: isolate;
}
.hero::before {
  content: '';
  position: absolute;
  inset: -20% -10% auto auto;
  width: 80%; height: 100%;
  background: radial-gradient(60% 60% at 70% 30%, var(--brand-glow), transparent 70%);
  filter: blur(40px);
  z-index: -1;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black, transparent 70%);
  z-index: -1;
  opacity: 0.5;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
}
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 50px; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 6px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: rgba(255,255,255,0.03);
  font-size: 12.5px;
  color: var(--ink-2);
  letter-spacing: 0.01em;
}
.eyebrow .dot {
  width: 8px; height: 8px;
  border-radius: 999px;
  background: var(--ok);
  box-shadow: 0 0 0 4px rgba(52,211,153,0.18);
  animation: pulse 2s ease-in-out infinite;
}
.eyebrow .pill {
  display: inline-flex;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(91,124,245,0.18);
  color: var(--brand-1);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(52,211,153,0.18); }
  50%      { box-shadow: 0 0 0 8px rgba(52,211,153,0.06); }
}

.h1 {
  font-family: var(--font-disp);
  font-weight: 800;
  font-size: clamp(40px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 24px 0 22px;
}
.h1 .accent {
  background: linear-gradient(120deg, #fff 0%, var(--brand-1) 60%, #C9D7FF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.h1 .strike {
  position: relative;
  display: inline-block;
  color: var(--ink-3);
}
.h1 .strike::after {
  content: '';
  position: absolute;
  left: -2%; right: -2%; top: 52%;
  height: 4px;
  background: var(--bad);
  transform: rotate(-3deg);
  border-radius: 2px;
}
.lede {
  font-size: 19px;
  line-height: 1.6;
  color: var(--ink-2);
  max-width: 560px;
  text-wrap: pretty;
}

.hero-cmd {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 540px;
}
.cmd-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #0B0F1A;
  border: 1px solid var(--line-2);
  border-radius: 14px;
  padding: 4px 4px 4px 16px;
  font-family: var(--font-mono);
  font-size: 14.5px;
  box-shadow: var(--shadow-card);
}
.cmd-row .prompt { color: var(--brand-1); user-select: none; }
.cmd-row code { color: var(--ink); flex: 1; padding: 12px 0; overflow: hidden; text-overflow: ellipsis; }
.cmd-row .copy {
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--brand);
  color: white;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.02em;
  transition: background .15s ease, transform .15s ease;
}
.cmd-row .copy:hover { background: var(--brand-1); }
.cmd-row .copy.copied { background: var(--ok); }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--ink-3);
}
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero-meta .sep { color: var(--ink-4); }

/* hero preview card */
.hero-preview {
  position: relative;
  perspective: 1500px;
}
.preview-card {
  position: relative;
  background: linear-gradient(180deg, #0E1426, #0A0F1E);
  border: 1px solid var(--line-2);
  border-radius: 22px;
  padding: 24px;
  box-shadow: var(--shadow-card);
  transform: rotate(-1deg);
  transition: transform .4s cubic-bezier(.2,.7,.3,1);
}
.preview-card:hover { transform: rotate(0deg) translateY(-4px); }
.preview-card::after {
  content: '';
  position: absolute; inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(160deg, rgba(91,124,245,0.5), transparent 40%, transparent 60%, rgba(91,124,245,0.25));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}
.pv-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.pv-name {
  font-family: var(--font-disp);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.pv-source {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-3);
  margin-top: 4px;
}
.pv-verdict {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(52,211,153,0.14);
  color: var(--ok);
  font-size: 12px;
  font-weight: 600;
}
.pv-score {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 4px;
}
.pv-score .big {
  font-family: var(--font-disp);
  font-weight: 800;
  font-size: 64px;
  letter-spacing: -0.04em;
  line-height: 0.9;
  background: linear-gradient(180deg, var(--ok), #16A34A);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.pv-score .of { color: var(--ink-3); font-size: 16px; font-family: var(--font-mono); }
.pv-reason { color: var(--ink-2); font-size: 13.5px; margin: 4px 0 18px; }
.pv-dims { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.pv-dim .pv-dim-label {
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.pv-dim .pv-bar {
  height: 6px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  overflow: hidden;
}
.pv-dim .pv-bar > i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--c);
  animation: grow 1.4s cubic-bezier(.2,.7,.2,1) .3s both;
  transform-origin: left;
  width: var(--w);
}
.pv-dim .pv-val {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink);
}
@keyframes grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }

.pv-footer {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed var(--line-2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: var(--ink-3);
}
.pv-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: rgba(255,255,255,0.03);
  font-family: var(--font-mono);
  font-size: 11px;
}

.float-tag {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(11,15,26,0.85);
  border: 1px solid var(--line-2);
  color: var(--ink-2);
  backdrop-filter: blur(8px);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 10px 30px -10px rgba(0,0,0,0.6);
}
.float-tag .ic { font-size: 13px; }
.float-tag.tl { top: -14px; left: -18px; transform: rotate(-3deg); }
.float-tag.br { bottom: -14px; right: -20px; transform: rotate(2deg); }
@media (max-width: 980px) {
  .float-tag.tl { left: 0; }
  .float-tag.br { right: 0; }
}

/* ---------- section atoms ---------- */
.sect {
  padding: 110px 0;
  border-top: 1px solid var(--line);
}
.sect-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--brand-1);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.sect-title {
  font-family: var(--font-disp);
  font-weight: 800;
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 0 0 18px;
  max-width: 880px;
  text-wrap: balance;
}
.sect-lede {
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-2);
  max-width: 680px;
  text-wrap: pretty;
}

/* ---------- "what is a skill" ---------- */
.skill-explain {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 64px;
  align-items: stretch;
}
@media (max-width: 900px) {
  .skill-explain { grid-template-columns: 1fr; }
}
.explain-card {
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px;
  position: relative;
}
.explain-card h3 {
  font-family: var(--font-disp);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.explain-card p {
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.65;
  margin: 0 0 12px;
}
.explain-card .badge-emoji {
  font-size: 22px;
  filter: saturate(1.1);
}

.skill-md {
  margin-top: 20px;
  background: #0B0F1A;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.7;
  overflow-x: auto;
}
.skill-md .k { color: var(--brand-1); }
.skill-md .v { color: var(--ink); }
.skill-md .h { color: var(--ink); font-weight: 600; }
.skill-md .c { color: var(--ink-4); }

.problem-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.problem-list li {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
  color: var(--ink-2);
  font-size: 15px;
}
.problem-list li:last-child { border-bottom: 0; }
.problem-list li .num {
  flex: 0 0 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  padding-top: 3px;
}
.problem-list li b { color: var(--ink); font-weight: 600; }

/* ---------- how it works ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 60px;
}
@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; }
}
.step {
  position: relative;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px;
  overflow: hidden;
}
.step::before {
  content: counter(step, decimal-leading-zero);
  counter-increment: step;
  position: absolute;
  top: 22px; right: 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-4);
}
.steps { counter-reset: step; }
.step h4 {
  font-family: var(--font-disp);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}
.step .step-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(91,124,245,0.14);
  border: 1px solid rgba(91,124,245,0.3);
  display: grid; place-items: center;
  font-size: 22px;
  margin-bottom: 18px;
}
.step p { color: var(--ink-2); font-size: 14.5px; line-height: 1.6; margin: 0 0 16px; }
.step .step-visual {
  background: #0A0F1C;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-2);
  min-height: 88px;
}
.step .step-visual .row { display: flex; align-items: center; gap: 8px; padding: 3px 0; }
.step .step-visual .row .dim {
  display: inline-flex;
  width: 56px;
  font-size: 11px;
  color: var(--ink-3);
}
.step .step-visual .row .b {
  flex: 1; height: 5px; background: rgba(255,255,255,0.06); border-radius: 999px; overflow: hidden;
}
.step .step-visual .row .b > i {
  display: block; height: 100%; background: var(--brand-1); border-radius: 999px;
}
.step .step-visual .row .n { color: var(--ink); font-size: 11px; width: 28px; text-align: right; }

/* ---------- 5-dim scroll-driven ---------- */
.dims-section { padding: 110px 0 60px; border-top: 1px solid var(--line); }
.dims-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  margin-top: 80px;
  align-items: start;
}
@media (max-width: 980px) { .dims-grid { grid-template-columns: 1fr; gap: 30px; } }

.dim-list { display: flex; flex-direction: column; gap: 28vh; padding-bottom: 30vh; }
.dim-step {
  position: relative;
  padding: 28px 28px 28px 32px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.018), rgba(255,255,255,0));
  opacity: 0.32;
  transition: opacity .35s ease, transform .35s ease, border-color .35s ease, box-shadow .35s ease;
  transform: translateY(8px);
}
.dim-step.active {
  opacity: 1;
  transform: translateY(0);
  border-color: rgba(255,255,255,0.16);
  box-shadow: 0 30px 80px -40px rgba(0,0,0,0.6), 0 0 0 1px var(--c) inset;
  background:
    radial-gradient(120% 80% at 0% 0%, color-mix(in oklab, var(--c) 18%, transparent), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0));
}
.dim-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.dim-num .swatch {
  width: 10px; height: 10px; border-radius: 3px;
  background: var(--c);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--c) 25%, transparent);
}
.dim-step h3 {
  font-family: var(--font-disp);
  font-weight: 800;
  font-size: 36px;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 10px;
}
.dim-step h3 .cn { color: var(--ink-3); font-size: 22px; margin-left: 8px; font-weight: 500; letter-spacing: 0; }
.dim-step .what { color: var(--ink-2); font-size: 15.5px; line-height: 1.6; margin: 0 0 16px; max-width: 480px; }
.dim-step .formula {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-2);
}
.dim-step .formula b { color: var(--c); font-weight: 600; }

.dim-stage-wrap { position: sticky; top: 80px; height: calc(100vh - 120px); min-height: 560px; }
.dim-stage {
  position: relative;
  height: 100%;
  background:
    radial-gradient(80% 60% at 50% 0%, color-mix(in oklab, var(--c) 18%, transparent), transparent 70%),
    linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--line-2);
  border-radius: var(--r-xl);
  padding: 32px;
  overflow: hidden;
  transition: background .4s ease, border-color .4s ease;
}
.dim-stage::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent 70%);
  pointer-events: none;
  opacity: 0.4;
}
.dim-stage-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-3);
}
.dim-stage-head .lhs { display: inline-flex; align-items: center; gap: 8px; }
.dim-stage-head .swatch { width: 10px; height: 10px; border-radius: 3px; background: var(--c); }
.dim-stage-head .rhs { display: inline-flex; align-items: center; gap: 14px; }

.dim-stage-canvas { position: relative; z-index: 1; height: calc(100% - 38px); }

/* stage variants */
.stage-bigscore {
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: center;
  align-items: center;
  gap: 18px;
  text-align: center;
}
.bs-val {
  font-family: var(--font-disp);
  font-weight: 800;
  font-size: clamp(140px, 18vw, 240px);
  letter-spacing: -0.06em;
  line-height: 0.85;
  color: var(--c);
  text-shadow: 0 0 80px color-mix(in oklab, var(--c) 50%, transparent);
}
.bs-suffix { color: var(--ink-3); font-family: var(--font-mono); font-size: 14px; margin-top: -12px; }
.bs-caption { color: var(--ink-2); font-size: 14px; max-width: 380px; text-wrap: pretty; }

/* relevance stage – token cloud */
.tokens { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; padding: 12px 18px; }
.tok {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 6px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  color: var(--ink-3);
  transition: all .25s ease;
}
.tok.hit {
  color: var(--c);
  border-color: color-mix(in oklab, var(--c) 50%, transparent);
  background: color-mix(in oklab, var(--c) 14%, transparent);
  box-shadow: 0 0 0 1px color-mix(in oklab, var(--c) 30%, transparent);
}

/* demand stage – sparkline bars */
.bars { display: flex; align-items: end; gap: 4px; height: 200px; padding: 12px 0; }
.bars .bar {
  flex: 1;
  background: linear-gradient(180deg, color-mix(in oklab, var(--c) 80%, white 0%), var(--c));
  border-radius: 4px 4px 0 0;
  min-height: 4px;
  opacity: 0.85;
}

/* recency stage – timeline */
.timeline {
  position: relative;
  display: flex;
  align-items: center;
  height: 80px;
  margin-top: 30px;
  padding: 0 12px;
}
.timeline .axis {
  position: absolute; left: 12px; right: 12px; top: 50%;
  height: 2px; background: rgba(255,255,255,0.08);
}
.timeline .pt {
  position: absolute;
  top: 50%;
  width: 8px; height: 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.18);
  transform: translate(-50%, -50%);
}
.timeline .pt.recent {
  width: 16px; height: 16px;
  background: var(--c);
  box-shadow: 0 0 0 6px color-mix(in oklab, var(--c) 25%, transparent), 0 0 24px var(--c);
}
.timeline-meta { display: flex; justify-content: space-between; padding: 0 12px; color: var(--ink-3); font-family: var(--font-mono); font-size: 11px; }

/* gap stage – two columns */
.gap-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; height: 100%; align-items: center; padding: 12px 0; }
.gap-col { background: rgba(0,0,0,0.25); border: 1px dashed var(--line-2); border-radius: var(--r-md); padding: 18px; text-align: center; }
.gap-col .gc-label { font-family: var(--font-mono); font-size: 11px; color: var(--ink-3); margin-bottom: 8px; letter-spacing: 0.04em; }
.gap-col .gc-val { font-family: var(--font-disp); font-weight: 800; font-size: 56px; letter-spacing: -0.04em; color: var(--c); }
.gap-col .gc-sub { color: var(--ink-2); font-size: 12.5px; margin-top: 6px; }

/* fit stage – env chips */
.env-list { display: flex; flex-direction: column; gap: 10px; padding: 12px 0; }
.env-row {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 12px 16px;
  background: rgba(0,0,0,0.22);
  border: 1px solid var(--line);
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
}
.env-row .k { color: var(--ink-3); font-size: 11.5px; letter-spacing: 0.04em; text-transform: uppercase; }
.env-row .v { color: var(--ink); }
.env-row .ok { color: var(--c); font-size: 12px; }

/* ---------- weighted formula band ---------- */
.formula-band {
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 20px 22px;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink-2);
}
.formula-band .term {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 10px; border-radius: 999px;
  border: 1px solid var(--line-2);
}
.formula-band .term .sw { width: 8px; height: 8px; border-radius: 3px; }
.formula-band .eq { color: var(--ink-3); }
.formula-band .out { color: var(--ink); font-weight: 600; }

/* ---------- privacy ---------- */
.privacy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-top: 50px;
}
@media (max-width: 980px) { .privacy { grid-template-columns: 1fr; } }
.privacy-claims { display: flex; flex-direction: column; gap: 18px; }
.claim {
  display: flex;
  gap: 16px;
  padding: 18px 20px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}
.claim .ic {
  flex: 0 0 36px; width: 36px; height: 36px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: rgba(52,211,153,0.15);
  color: var(--ok);
  font-size: 18px;
}
.claim h4 { margin: 0 0 4px; font-family: var(--font-disp); font-size: 17px; font-weight: 700; letter-spacing: -0.01em; }
.claim p { margin: 0; color: var(--ink-2); font-size: 14px; line-height: 1.55; }

.machine {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--r-xl);
  background:
    radial-gradient(60% 60% at 50% 50%, rgba(91,124,245,0.18), transparent 70%),
    linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--line-2);
  padding: 28px;
  overflow: hidden;
}
.machine .laptop {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 64%;
  aspect-ratio: 16 / 10;
  background: #0B0F1A;
  border: 1px solid var(--line-2);
  border-radius: 14px 14px 4px 4px;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.6), inset 0 0 40px rgba(91,124,245,0.06);
  display: flex;
  flex-direction: column;
}
.machine .screen-bar { height: 22px; background: rgba(255,255,255,0.04); border-bottom: 1px solid var(--line); display: flex; align-items: center; gap: 4px; padding: 0 10px; }
.machine .screen-bar i { display: inline-block; width: 7px; height: 7px; border-radius: 999px; background: rgba(255,255,255,0.15); }
.machine .screen-bar i:nth-child(1) { background: #FB7185; }
.machine .screen-bar i:nth-child(2) { background: #FBBF24; }
.machine .screen-bar i:nth-child(3) { background: #34D399; }
.machine .screen-body {
  flex: 1; padding: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-2);
  line-height: 1.5;
  overflow: hidden;
}
.machine .screen-body .ln { display: flex; gap: 8px; }
.machine .screen-body .ln .lc { color: var(--ink-4); width: 18px; text-align: right; flex: 0 0 18px; }
.machine .screen-body .ln .lt { color: var(--ink-2); }
.machine .screen-body .ln .lt b { color: var(--brand-1); font-weight: 600; }
.machine .keyboard {
  height: 6%;
  background: linear-gradient(180deg, rgba(255,255,255,0.08), transparent);
  border-radius: 0 0 14px 14px;
}
.machine .ring {
  position: absolute;
  top: 50%; left: 50%;
  border-radius: 999px;
  border: 1px dashed rgba(91,124,245,0.45);
  transform: translate(-50%, -50%);
  animation: ringPulse 4s ease-in-out infinite;
}
.machine .ring.r1 { width: 80%; aspect-ratio: 1; animation-delay: 0s; }
.machine .ring.r2 { width: 110%; aspect-ratio: 1; animation-delay: 1.3s; }
.machine .ring.r3 { width: 140%; aspect-ratio: 1; animation-delay: 2.6s; }
@keyframes ringPulse {
  0%, 100% { opacity: 0; }
  35% { opacity: 0.5; }
  70% { opacity: 0; }
}
.machine .cloud-x {
  position: absolute;
  bottom: 14px; right: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  background: rgba(251,113,133,0.12);
  border: 1px solid rgba(251,113,133,0.32);
  color: var(--bad);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
}
.machine .cloud-x::before { content: '☁'; text-decoration: line-through; }

/* ---------- sample / verdict-rail ---------- */
.verdicts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 56px;
}
@media (max-width: 760px) { .verdicts { grid-template-columns: 1fr 1fr; } }
.verdict-card {
  position: relative;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 22px;
  overflow: hidden;
}
.verdict-card .badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  background: color-mix(in oklab, var(--c) 18%, transparent);
  color: var(--c);
  border: 1px solid color-mix(in oklab, var(--c) 38%, transparent);
}
.verdict-card h4 {
  font-family: var(--font-disp); font-size: 19px; font-weight: 700; letter-spacing: -0.02em;
  margin: 14px 0 6px;
}
.verdict-card .score {
  font-family: var(--font-disp); font-weight: 800;
  font-size: 38px; letter-spacing: -0.04em; line-height: 1;
  color: var(--c);
  margin-top: 14px;
}
.verdict-card .score small { color: var(--ink-3); font-family: var(--font-mono); font-size: 14px; font-weight: 500; }
.verdict-card p { color: var(--ink-2); font-size: 13.5px; line-height: 1.55; margin: 6px 0 0; }

/* ---------- FAQ ---------- */
.faq {
  margin-top: 50px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 22px;
}
@media (max-width: 820px) { .faq { grid-template-columns: 1fr; } }
.faq details {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 18px 22px;
  transition: border-color .2s ease, background .2s ease;
}
.faq details[open] { border-color: var(--line-2); background: var(--bg-2); }
.faq summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--font-disp);
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--ink-3);
  transition: transform .2s ease;
}
.faq details[open] summary::after { content: '–'; }
.faq details p {
  margin: 14px 0 0;
  color: var(--ink-2);
  font-size: 14.5px;
  line-height: 1.65;
}
.faq details code {
  background: rgba(91,124,245,0.14);
  color: var(--brand-1);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12.5px;
}

/* ---------- install / CTA ---------- */
.cta {
  position: relative;
  margin: 80px auto 0;
  max-width: 980px;
  padding: 60px 48px;
  border-radius: var(--r-xl);
  background:
    radial-gradient(60% 80% at 0% 0%, rgba(91,124,245,0.28), transparent 60%),
    radial-gradient(60% 80% at 100% 100%, rgba(91,124,245,0.18), transparent 60%),
    linear-gradient(180deg, #131A2E, #0C111E);
  border: 1px solid var(--line-2);
  text-align: center;
  overflow: hidden;
}
.cta::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 50%, black, transparent 70%);
  pointer-events: none;
}
.cta h2 {
  position: relative;
  font-family: var(--font-disp);
  font-weight: 800;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0 0 14px;
}
.cta p { position: relative; color: var(--ink-2); font-size: 17px; margin: 0 auto 30px; max-width: 540px; }
.cta .cmd-row { position: relative; margin: 0 auto; }
.cta .alt { position: relative; margin-top: 14px; font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }
.cta .alt code { color: var(--ink); background: rgba(255,255,255,0.05); padding: 2px 6px; border-radius: 4px; }

.cta-links {
  position: relative;
  display: flex;
  gap: 14px;
  justify-content: center;
  margin-top: 28px;
  flex-wrap: wrap;
}
.cta-links a {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  font-size: 14px;
  color: var(--ink-2);
  background: rgba(255,255,255,0.03);
  transition: all .15s ease;
}
.cta-links a:hover { background: rgba(255,255,255,0.08); color: var(--ink); }

/* ---------- footer ---------- */
.foot {
  border-top: 1px solid var(--line);
  padding: 36px 0 50px;
  margin-top: 100px;
  font-size: 13px;
  color: var(--ink-3);
}
.foot-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.foot a { color: var(--ink-2); }
.foot a:hover { color: var(--ink); }
.foot .ascii { font-family: var(--font-mono); color: var(--ink-4); font-size: 11px; }