/* ============================================================
   Info-Score v2 — Design System
   Minimaliste radical · Space Grotesk · Accent deep navy
   ============================================================ */

/* ---- Design tokens ---- */
:root {
  --font: 'Space Grotesk', system-ui, -apple-system, sans-serif;

  /* Neutrals */
  --ink:       #0a0f1e;
  --ink-2:     #1e293b;
  --ink-3:     #475569;
  --ink-4:     #64748b;
  --surface:   #ffffff;
  --surface-2: #eef2f7;
  --surface-3: #e2e8f2;
  --accent:    #0f2b5b;
  --accent-h:  #1a3a6b;
  --border:    #e2e8f0;
  --border-2:  #cbd5e1;

  /* Grade palette */
  --ga: #16a34a; --ga-bg: #f0fdf4; --ga-bd: #bbf7d0;
  --gb: #2563eb; --gb-bg: #eff6ff; --gb-bd: #bfdbfe;
  --gc: #ca8a04; --gc-bg: #fefce8; --gc-bd: #fef08a;
  --gd: #ea580c; --gd-bg: #fff7ed; --gd-bd: #fed7aa;
  --ge: #dc2626; --ge-bg: #fef2f2; --ge-bd: #fecaca;
  --gn: #64748b; --gn-bg: #f8fafc; --gn-bd: #e2e8f0;

  /* Scale */
  --section:   120px;
  --container: 1100px;
  --r:         6px;
  --r-lg:      12px;
  --r-xl:      20px;

  /* Shadow */
  --sh-sm: 0 1px 4px rgba(10,15,30,.08);
  --sh:    0 2px 12px rgba(10,15,30,.10), 0 1px 3px rgba(10,15,30,.06);
  --sh-lg: 0 12px 36px rgba(10,15,30,.14), 0 4px 8px rgba(10,15,30,.08);

  --ease: cubic-bezier(.4,0,.2,1);
  --t: .2s;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

/* ---- Layout ---- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}
.section       { padding: var(--section) 0; }
.section--alt  { background: var(--surface-2); }
.section--dark { background: var(--ink); color: var(--surface); }

/* ---- Navigation ---- */
.nav {
  position: sticky; top: 0; z-index: 200;
  background: rgba(255,255,255,.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 2px solid var(--surface-3);
  box-shadow: 0 1px 8px rgba(10,15,30,.07);
}
.nav__inner {
  display: flex; align-items: center;
  justify-content: space-between;
  height: 60px; gap: 8px;
}
.nav__logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 17px; color: var(--ink);
  letter-spacing: -.4px; flex-shrink: 0;
}
.nav__logo-mark {
  width: 30px; height: 30px; flex-shrink: 0;
}
.nav__links { display: flex; align-items: center; gap: 2px; }
.nav__link {
  padding: 7px 12px; border-radius: var(--r);
  font-size: 14px; font-weight: 500; color: var(--ink-3);
  transition: color var(--t) var(--ease), background var(--t) var(--ease);
}
.nav__link:hover { color: var(--ink); background: var(--surface-2); }
.nav__link--active { color: var(--ink); }
.nav__cta {
  padding: 8px 16px; border-radius: var(--r);
  font-size: 14px; font-weight: 600;
  background: var(--accent); color: #fff;
  transition: background var(--t) var(--ease);
  margin-left: 6px;
}
.nav__cta:hover { background: var(--accent-h); }
.nav__toggle {
  display: none; background: none; border: none;
  cursor: pointer; color: var(--ink); padding: 4px;
}

/* ---- Hero ---- */
.hero {
  padding: 100px 0 80px;
  border-bottom: 1px solid var(--border);
}
.hero__label {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600; letter-spacing: .5px;
  text-transform: uppercase; color: var(--ink-3);
  padding: 5px 12px; border: 1px solid var(--border);
  border-radius: 100px; margin-bottom: 28px;
}
.hero__title {
  font-size: clamp(40px, 6.5vw, 80px);
  font-weight: 700; line-height: 1.06;
  letter-spacing: -2.5px; color: var(--ink);
  margin-bottom: 24px; max-width: 880px;
}
.hero__sub {
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--ink-3); line-height: 1.7;
  max-width: 560px; margin-bottom: 40px;
}
.hero__actions {
  display: flex; gap: 12px; align-items: center;
  flex-wrap: wrap; margin-bottom: 68px;
}
.hero__stats {
  display: flex; padding-top: 40px;
  border-top: 1px solid var(--border);
}
.hero__stat {
  flex: 1; padding-right: 32px;
  border-right: 1px solid var(--border);
  margin-right: 32px;
}
.hero__stat:last-child {
  border-right: none; margin-right: 0; padding-right: 0;
}
.hero__stat-n {
  font-size: 38px; font-weight: 800; color: var(--accent);
  letter-spacing: -2px; line-height: 1.05;
}
.hero__stat-l {
  font-size: 13px; color: var(--ink-3); margin-top: 6px; font-weight: 500;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: var(--r);
  font-size: 14px; font-weight: 600; font-family: var(--font);
  cursor: pointer; border: none;
  transition: all var(--t) var(--ease); white-space: nowrap;
}
.btn--dark {
  background: var(--ink); color: #fff;
}
.btn--dark:hover { background: var(--ink-2); }
.btn--accent {
  background: var(--accent); color: #fff;
}
.btn--accent:hover { background: var(--accent-h); }
.btn--outline {
  background: transparent; color: var(--ink);
  border: 1px solid var(--border-2);
}
.btn--outline:hover { border-color: var(--ink); background: var(--surface-2); }
.btn--ghost {
  background: transparent; color: var(--ink-3);
  padding-left: 0; padding-right: 0;
}
.btn--ghost:hover { color: var(--ink); }
.btn--sm { padding: 8px 14px; font-size: 13px; }

/* ---- Badges ---- */
.badge {
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 800; letter-spacing: .5px; line-height: 1;
}
.badge--lg { width: 48px; height: 48px; font-size: 22px; border-radius: var(--r-lg); }
.badge--md { width: 36px; height: 36px; font-size: 16px; border-radius: var(--r); }
.badge--sm { width: 26px; height: 26px; font-size: 11px; border-radius: 4px; }
.badge--A { background: var(--ga); color: #fff; }
.badge--B { background: var(--gb); color: #fff; }
.badge--C { background: var(--gc); color: #fff; }
.badge--D { background: var(--gd); color: #fff; }
.badge--E { background: var(--ge); color: #fff; }
.badge--N { background: var(--gn); color: #fff; }

/* ---- Generic card ---- */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 28px;
  box-shadow: var(--sh-sm);
  transition: box-shadow var(--t) var(--ease), border-color var(--t) var(--ease);
}
.card:hover { box-shadow: var(--sh-lg); border-color: var(--border-2); }

/* ---- Section headers ---- */
.section-label {
  font-size: 11px; font-weight: 700; letter-spacing: 1.2px;
  text-transform: uppercase; color: var(--ink-4); margin-bottom: 12px;
}
.section-title {
  font-size: clamp(22px, 3vw, 36px); font-weight: 700;
  letter-spacing: -.8px; line-height: 1.2; margin-bottom: 14px;
}
.section-sub {
  font-size: 16px; color: var(--ink-3); line-height: 1.65;
  max-width: 520px;
}
.section-header         { margin-bottom: 56px; }
.section-header--center { text-align: center; }
.section-header--center .section-sub { margin: 0 auto; }

/* ---- Page header (interior) ---- */
.page-header {
  padding: 72px 0 60px;
  background: var(--surface-2);
  border-bottom: 2px solid var(--surface-3);
}
.page-header h1 {
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 700; letter-spacing: -1.2px;
  line-height: 1.12; margin-bottom: 16px;
}
.page-header p {
  font-size: 17px; color: var(--ink-3);
  max-width: 580px; line-height: 1.7;
}
.page-header-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }

/* ---- TOC bar ---- */
.toc-bar {
  background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 60px; z-index: 100;
}
.toc-bar__inner {
  display: flex; align-items: center; gap: 6px;
  padding: 11px 0; overflow-x: auto; white-space: nowrap;
  font-size: 13px; color: var(--ink-4); scrollbar-width: none;
}
.toc-bar__inner::-webkit-scrollbar { display: none; }
.toc-bar__inner a { color: var(--ink-3); font-weight: 500; transition: color var(--t) var(--ease); }
.toc-bar__inner a:hover { color: var(--accent); }
.toc-sep { color: var(--border-2); user-select: none; }

/* ---- RUB cards ---- */
.rub-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.rub-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 32px 28px;
  position: relative; overflow: hidden;
  box-shadow: var(--sh-sm);
  transition: box-shadow var(--t) var(--ease);
}
.rub-card:hover { box-shadow: var(--sh-lg); }
.rub-card::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
}
.rub-card--R::after { background: var(--gb); }
.rub-card--U::after { background: #059669; }
.rub-card--B::after { background: var(--gc); }
.rub-letter {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 10px; margin-bottom: 20px;
  font-size: 20px; font-weight: 800;
}
.rub-letter--R { background: #dbeafe; color: #1d4ed8; }
.rub-letter--U { background: #d1fae5; color: #065f46; }
.rub-letter--B { background: #fef9c3; color: #854d0e; }
.rub-pct { font-size: 44px; font-weight: 700; letter-spacing: -2px; line-height: 1; margin-bottom: 2px; }
.rub-pct--R { color: var(--gb); }
.rub-pct--U { color: #059669; }
.rub-pct--B { color: var(--gc); }
.rub-name  { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.rub-dim   { font-size: 12px; color: var(--ink-4); font-weight: 500; text-transform: uppercase; letter-spacing: .5px; margin-bottom: 16px; }
.rub-desc  { font-size: 14px; color: var(--ink-3); line-height: 1.65; margin-bottom: 16px; }
.rub-crit  { font-size: 12px; color: var(--ink-4); line-height: 1.7; }

/* ---- Steps ---- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; background: var(--border); border-radius: var(--r-xl); overflow: hidden; }
.step {
  background: var(--surface); padding: 40px 32px;
}
.step__num {
  font-size: 52px; font-weight: 800; letter-spacing: -3px;
  color: var(--ink-4); margin-bottom: 20px; line-height: 1; user-select: none;
}
.step__title { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.step__desc  { font-size: 14px; color: var(--ink-3); line-height: 1.65; }

/* ---- Showcase grid ---- */
.showcase-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: var(--r-xl); overflow: hidden;
}
.showcase-card {
  background: var(--surface); padding: 24px;
  display: flex; gap: 16px; align-items: flex-start;
  transition: background var(--t) var(--ease);
}
.showcase-card:hover { background: var(--surface-2); }
.showcase-content { flex: 1; min-width: 0; }
.showcase-meta   { font-size: 12px; color: var(--ink-4); margin-bottom: 6px; }
.showcase-title  { font-size: 14px; font-weight: 600; color: var(--ink); line-height: 1.45; margin-bottom: 8px; }
.showcase-score  { font-size: 12px; color: var(--ink-3); margin-bottom: 6px; }
.showcase-score strong { color: var(--ink-2); }
.showcase-excerpt { font-size: 13px; color: var(--ink-3); line-height: 1.55; }

/* ---- Grade cards ---- */
.grades-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.grade-card {
  border: 1px solid; border-radius: var(--r-lg); padding: 20px 22px;
}
.grade-card--A { background: var(--ga-bg); border-color: var(--ga-bd); }
.grade-card--B { background: var(--gb-bg); border-color: var(--gb-bd); }
.grade-card--C { background: var(--gc-bg); border-color: var(--gc-bd); }
.grade-card--D { background: var(--gd-bg); border-color: var(--gd-bd); }
.grade-card--E { background: var(--ge-bg); border-color: var(--ge-bd); }
.grade-card--N { background: var(--gn-bg); border-color: var(--gn-bd); }
.grade-card__top { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.grade-card__name { font-size: 15px; font-weight: 700; }
.grade-card__threshold { font-size: 14px; font-weight: 700; margin-left: auto; }
.grade-card--A .grade-card__threshold { color: var(--ga); }
.grade-card--B .grade-card__threshold { color: var(--gb); }
.grade-card--C .grade-card__threshold { color: var(--gc); }
.grade-card--D .grade-card__threshold { color: var(--gd); }
.grade-card--E .grade-card__threshold { color: var(--ge); }
.grade-card--N .grade-card__threshold { color: var(--gn); }
.grade-card__desc { font-size: 13px; color: var(--ink-3); line-height: 1.6; }

/* ---- Pricing ---- */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pricing-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-xl); padding: 32px;
  box-shadow: var(--sh);
}
.pricing-card--featured { border-color: var(--accent); border-width: 2px; }
.pricing-tier { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--ink-4); margin-bottom: 10px; }
.pricing-price {
  font-size: 42px; font-weight: 700; letter-spacing: -2px;
  line-height: 1; margin-bottom: 4px; color: var(--ink);
}
.pricing-price span { font-size: 16px; font-weight: 400; color: var(--ink-3); letter-spacing: 0; }
.pricing-note { font-size: 12px; color: var(--ink-4); margin-bottom: 20px; }
.pricing-desc {
  font-size: 14px; color: var(--ink-3); line-height: 1.65;
  margin-bottom: 24px; padding-bottom: 24px; border-bottom: 1px solid var(--border);
}
.pricing-features { list-style: none; margin-bottom: 28px; }
.pricing-features li {
  display: flex; gap: 10px; font-size: 14px;
  padding: 8px 0; border-bottom: 1px solid var(--surface-3);
}
.pricing-features li:last-child { border-bottom: none; }
.pricing-features li::before {
  content: '✓'; color: var(--ga); font-weight: 700;
  flex-shrink: 0; margin-top: 1px;
}
.pricing-btn {
  display: block; text-align: center; padding: 13px;
  border-radius: var(--r); font-weight: 600; font-size: 14px;
  transition: all var(--t) var(--ease); font-family: var(--font);
}
.pricing-btn--dark    { background: var(--ink); color: #fff; border: none; }
.pricing-btn--dark:hover { background: var(--ink-2); }
.pricing-btn--accent  { background: var(--accent); color: #fff; border: none; }
.pricing-btn--accent:hover { background: var(--accent-h); }
.pricing-btn--outline { border: 1px solid var(--border-2); color: var(--ink); background: none; }
.pricing-btn--outline:hover { border-color: var(--ink); background: var(--surface-2); }

/* ---- Comparison table ---- */
.compare-table th:not(:first-child) { text-align: center; }
.compare-table td:not(:first-child) { text-align: center; }
.check  { color: var(--ga); font-weight: 700; font-size: 16px; }
.cross  { color: var(--border-2); font-size: 16px; }

/* ---- FAQ ---- */
.faq { max-width: 700px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q {
  width: 100%; background: none; border: none; text-align: left;
  cursor: pointer; padding: 20px 0;
  font-size: 15px; font-weight: 600; color: var(--ink);
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  font-family: var(--font); transition: color var(--t) var(--ease);
}
.faq-q:hover { color: var(--accent); }
.faq-q .chevron { flex-shrink: 0; transition: transform var(--t) var(--ease); color: var(--ink-4); }
.faq-a {
  font-size: 14px; color: var(--ink-3); line-height: 1.8;
  padding-bottom: 20px; padding-right: 32px; display: none;
}
.faq-item.open .faq-a   { display: block; }
.faq-item.open .chevron { transform: rotate(180deg); }

/* ---- KPI grid ---- */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 48px; }
.kpi {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 24px 28px;
  box-shadow: var(--sh);
  border-top: 3px solid var(--accent);
}
.kpi__val   { font-size: 40px; font-weight: 800; letter-spacing: -2px; color: var(--accent); margin-bottom: 6px; line-height: 1; }
.kpi__label { font-size: 13px; color: var(--ink-3); font-weight: 500; }

/* ---- Charts ---- */
.charts-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.chart-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 28px;
  box-shadow: var(--sh-sm);
}
.chart-title { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.chart-sub   { font-size: 12px; color: var(--ink-4); margin-bottom: 24px; }

/* ---- Bar rows ---- */
.bar-row   { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.bar-label { font-size: 13px; font-weight: 500; width: 160px; flex-shrink: 0; color: var(--ink-2); }
.bar-track { flex: 1; background: var(--surface-3); border-radius: 4px; overflow: hidden; height: 8px; }
.bar-fill  { height: 100%; border-radius: 4px; transition: width .9s var(--ease); }
.bar-value { font-size: 13px; color: var(--ink-3); width: 44px; text-align: right; flex-shrink: 0; font-weight: 600; }

/* ---- Source rows ---- */
.source-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.source-row:last-child { border-bottom: none; }
.source-name { font-size: 14px; font-weight: 600; color: var(--ink); }
.source-meta { font-size: 12px; color: var(--ink-4); margin-top: 2px; }

/* ---- Table ---- */
.table-wrap { overflow-x: auto; border-radius: var(--r-lg); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead th {
  padding: 12px 16px; background: var(--surface-2); text-align: left;
  font-size: 11px; font-weight: 700; color: var(--ink-3);
  letter-spacing: .4px; text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}
tbody tr { border-bottom: 1px solid var(--surface-3); transition: background var(--t) var(--ease); }
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }
tbody td { padding: 13px 16px; color: var(--ink-2); vertical-align: top; line-height: 1.5; }
tfoot td { padding: 13px 16px; background: var(--ink); color: #fff; font-weight: 700; }
.coeff { font-weight: 700; color: var(--accent); }
.dim-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px; border-radius: 4px;
  font-size: 11px; font-weight: 700;
}
.dim-R { background: #dbeafe; color: #1d4ed8; }
.dim-U { background: #d1fae5; color: #065f46; }
.dim-B { background: #fef9c3; color: #854d0e; }

/* ---- Formula ---- */
.formula-box {
  background: var(--ink); color: #fff;
  border-radius: var(--r-xl); padding: 48px;
  text-align: center; margin: 32px 0;
}
.formula-label { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,.35); margin-bottom: 16px; }
.formula-eq {
  font-family: 'SF Mono', 'Fira Mono', 'Consolas', monospace;
  font-size: clamp(14px, 2.2vw, 22px);
  color: #93c5fd; margin-bottom: 16px; line-height: 1.4;
}
.formula-note { font-size: 14px; color: rgba(255,255,255,.5); line-height: 1.8; }

/* ---- API layout ---- */
.api-layout { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 48px; align-items: start; }
.api-toc {
  position: sticky; top: 76px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 20px;
}
.api-toc-title { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--ink-4); margin-bottom: 12px; }
.api-toc a {
  display: block; font-size: 13px; color: var(--ink-3);
  padding: 6px 0; border-bottom: 1px solid var(--border);
  transition: color var(--t) var(--ease);
}
.api-toc a:last-child { border-bottom: none; }
.api-toc a:hover { color: var(--accent); }
.api-section { margin-bottom: 56px; }
.api-section h2 {
  font-size: 22px; font-weight: 700; letter-spacing: -.5px;
  padding-bottom: 14px; border-bottom: 2px solid var(--surface-3);
  margin-bottom: 20px; color: var(--ink);
}
.api-section h3 { font-size: 15px; font-weight: 700; margin: 20px 0 10px; }
.api-section p  { font-size: 14px; color: var(--ink-3); line-height: 1.75; margin-bottom: 14px; }
code {
  background: var(--surface-3); padding: 2px 6px; border-radius: 4px;
  font-family: 'SF Mono', 'Fira Mono', 'Consolas', monospace;
  font-size: 13px; color: var(--accent);
}
pre {
  background: #0d1117; color: #c9d1d9;
  border-radius: var(--r-lg); padding: 20px 24px;
  overflow-x: auto; font-size: 13px; line-height: 1.7;
  font-family: 'SF Mono', 'Fira Mono', 'Consolas', monospace; margin: 12px 0;
}
pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

/* ---- Endpoint cards ---- */
.endpoint { border: 1px solid var(--border); border-radius: var(--r-lg); overflow: hidden; margin-bottom: 20px; }
.endpoint-header {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 20px; background: var(--surface-2); border-bottom: 1px solid var(--border);
}
.method { font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 4px; letter-spacing: .5px; }
.method--post { background: #d1fae5; color: #065f46; }
.method--get  { background: #dbeafe; color: #1d4ed8; }
.endpoint-path  { font-family: monospace; font-size: 14px; font-weight: 600; color: var(--ink); }
.endpoint-price { margin-left: auto; font-size: 12px; color: var(--ink-4); }
.endpoint-body  { padding: 24px; }
.param-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.param-table th { text-align: left; padding: 8px 12px; background: var(--surface-2); font-weight: 600; color: var(--ink-3); font-size: 11px; text-transform: uppercase; letter-spacing: .3px; }
.param-table td { padding: 10px 12px; border-top: 1px solid var(--border); vertical-align: top; color: var(--ink-2); }
.param-name { font-family: monospace; font-weight: 700; color: var(--accent); }
.param-req  { font-size: 11px; color: var(--ge); font-weight: 700; }
.param-opt  { font-size: 11px; color: var(--ink-4); }

/* ---- Alert boxes ---- */
.note { background: #eff6ff; border-left: 3px solid var(--gb); border-radius: 0 var(--r) var(--r) 0; padding: 14px 18px; font-size: 14px; color: #1e3a8a; margin: 14px 0; line-height: 1.6; }
.warn { background: #fefce8; border-left: 3px solid var(--gc); border-radius: 0 var(--r) var(--r) 0; padding: 14px 18px; font-size: 14px; color: #78350f; margin: 14px 0; line-height: 1.6; }

/* ---- Base URL box ---- */
.base-url { background: var(--ink); color: #93c5fd; padding: 14px 20px; border-radius: var(--r-lg); font-family: monospace; font-size: 15px; margin: 12px 0 20px; letter-spacing: .3px; }

/* ---- CTA block ---- */
.cta-block {
  background: var(--ink); border-radius: var(--r-xl);
  padding: 72px 48px; text-align: center; color: #fff;
}
.cta-block h2 { font-size: clamp(24px, 3vw, 38px); font-weight: 700; letter-spacing: -1px; margin-bottom: 14px; }
.cta-block p  { font-size: 17px; color: rgba(255,255,255,.6); margin-bottom: 32px; line-height: 1.65; }
.cta-block .btn--light { background: #fff; color: var(--ink); }
.cta-block .btn--light:hover { background: #f1f5f9; }
.cta-block .btn--ghost-white { background: none; color: rgba(255,255,255,.7); border: 1px solid rgba(255,255,255,.2); }
.cta-block .btn--ghost-white:hover { border-color: rgba(255,255,255,.5); color: #fff; }

/* ---- Footer ---- */
.footer { background: var(--ink); color: rgba(255,255,255,.6); padding: 64px 0 32px; }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 56px; }
.footer__brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer__brand-name { font-size: 15px; font-weight: 700; color: #fff; }
.footer__brand-desc { font-size: 13px; line-height: 1.7; color: rgba(255,255,255,.4); margin-bottom: 16px; }
.footer__mail { font-size: 13px; color: rgba(255,255,255,.5); transition: color var(--t) var(--ease); }
.footer__mail:hover { color: #fff; }
.footer__col-title { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,.3); margin-bottom: 14px; }
.footer__links { list-style: none; }
.footer__links li { margin-bottom: 10px; }
.footer__links a { font-size: 13px; color: rgba(255,255,255,.5); transition: color var(--t) var(--ease); }
.footer__links a:hover { color: #fff; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08); padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: rgba(255,255,255,.28); flex-wrap: wrap; gap: 8px;
}

/* ---- Scroll animations ---- */
[data-animate] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .65s var(--ease), transform .65s var(--ease);
}
[data-animate].is-visible { opacity: 1; transform: translateY(0); }
[data-delay="1"] { transition-delay: .1s; }
[data-delay="2"] { transition-delay: .2s; }
[data-delay="3"] { transition-delay: .3s; }
[data-delay="4"] { transition-delay: .4s; }

/* ---- Utilities ---- */
.text-center  { text-align: center; }
.flex         { display: flex; }
.flex-wrap    { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-12 { gap: 12px; }
.gap-14 { gap: 14px; }
.mt-8  { margin-top: 8px;  }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.mb-48 { margin-bottom: 48px; }
.w-full { width: 100%; }

/* ---- Responsive ---- */
@media (max-width: 960px) {
  :root { --section: 80px; }
  .rub-grid  { grid-template-columns: 1fr; }
  .charts-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .hero__stats { flex-wrap: wrap; }
  .hero__stat { flex: 1 1 40%; border-right: none; padding-right: 0; margin-right: 0; }
}
@media (max-width: 768px) {
  .steps  { grid-template-columns: 1fr; gap: 1px; border-radius: var(--r-lg); }
  .showcase-grid { grid-template-columns: 1fr; }
  .grades-grid   { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid  { grid-template-columns: 1fr; }
  .kpi-grid      { grid-template-columns: repeat(2, 1fr); }
  .api-layout    { grid-template-columns: 1fr; }
  .api-toc       { display: none; }
  .nav__links    { display: none; }
  .nav__links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 60px; left: 0; right: 0;
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 12px 28px 16px; gap: 2px;
    box-shadow: var(--sh-lg);
  }
  .nav__toggle { display: flex; align-items: center; }
  .nav__inner  { position: relative; }
  .hero { padding: 60px 0 52px; }
  .hero__title { letter-spacing: -1.5px; }
  .hero__stats { gap: 20px; }
  .hero__stat  { flex: 1 1 40%; }
  .cta-block   { padding: 48px 24px; }
  .formula-box { padding: 32px 24px; }
}
@media (max-width: 480px) {
  .grades-grid { grid-template-columns: 1fr; }
  .kpi-grid    { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .hero__stat  { flex: 1 1 100%; }
}

/* ---- Skip link ---- */
.skip-link {
  position: absolute; top: -100%; left: 8px;
  background: var(--accent); color: #fff;
  padding: 8px 16px; border-radius: var(--r);
  font-size: 14px; font-weight: 600; z-index: 1000;
  text-decoration: none; white-space: nowrap;
}
.skip-link:focus { top: 8px; outline: 2px solid #fff; outline-offset: 2px; }

/* ---- Focus visible ---- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}
.nav__cta:focus-visible,
.btn:focus-visible,
.pricing-btn:focus-visible { border-radius: var(--r); }

/* ---- Referentiel layout helpers ---- */
.dim-card {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 32px;
  align-items: start;
}
.formula-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

/* ---- Bar label wide variant ---- */
.bar-label--wide { width: 200px; }

/* ---- API mobile TOC nav ---- */
.api-toc-mobile { display: none; }

@media (max-width: 768px) {
  .api-toc-mobile {
    display: block;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 16px 20px;
    margin-bottom: 32px;
  }
  .api-toc-mobile__title {
    font-size: 11px; font-weight: 700;
    text-transform: uppercase; letter-spacing: 1px;
    color: var(--ink-4); margin-bottom: 10px;
  }
  .api-toc-mobile__links {
    display: flex; flex-wrap: wrap; gap: 6px;
    list-style: none;
  }
  .api-toc-mobile__links a {
    font-size: 13px; color: var(--ink-3);
    padding: 5px 10px; border-radius: var(--r);
    border: 1px solid var(--border);
    transition: all var(--t) var(--ease);
    display: block;
  }
  .api-toc-mobile__links a:hover { color: var(--accent); border-color: var(--accent); }
}
@media (max-width: 600px) {
  .dim-card { grid-template-columns: 1fr; gap: 16px; }
  .formula-stats-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .bar-label { width: 80px; font-size: 12px; }
  .bar-label--wide { width: 120px; }
  .bar-value { width: 36px; font-size: 12px; }
}