/* =============================================================
   LANDING — design tokens & fluid layout
   ============================================================= */

:root {
  /* --- Цвета --- */
  --color-bg:           #f4f1ea;
  --color-surface:      #fcfbf9;
  --color-bubble-ai:    #edeae1;
  --color-bubble-user:  #23221f;
  --color-text:         #2b2a27;
  --color-text-muted:   #8c877d;
  --color-border:       #e2dfd6;
  --color-accent:       #23221f;
  --color-white:        #ffffff;
  --color-citation:     #8a2535;
  --color-miss:         #bd6324;

  --color-shadow-sm:         rgba(35, 34, 31, 0.06);
  --color-shadow-md:         rgba(35, 34, 31, 0.05);
  --color-shadow-lg:       rgba(35, 34, 31, 0.13);
  --color-citation-bg-hover: rgba(138, 37, 53, 0.08);
  --color-citation-border:   rgba(138, 37, 53, 0.3);

  /* --- Шрифты --- */
  --font-family:      'Lora', 'Times New Roman', serif;
  --font-family-mono: 'Courier Prime', 'Courier New', Courier, monospace;

  /* --- Размеры шрифта — все fluid (clamp) --- */
  --fs-2xs:     clamp(0.6875rem, 0.3vw + 0.625rem, 0.75rem);
  --fs-sm:      clamp(0.8125rem, 0.45vw + 0.725rem, 0.875rem);
  --fs-base:    clamp(0.875rem,  0.5vw + 0.775rem, 0.9375rem);
  --fs-md:      clamp(0.875rem,  0.6vw + 0.75rem,  1rem);
  --fs-lg:      clamp(1rem,      0.7vw + 0.85rem,  1.125rem);
  --fs-xl:      clamp(1.05rem,   0.8vw + 0.875rem, 1.2rem);
  --fs-2xl:     clamp(1.15rem,   1vw + 0.9rem,    1.375rem);
  --fs-section: clamp(1.75rem,   3.2vw,             3rem);
  --fs-cta:     clamp(1.8rem,    3.5vw,             3rem);
  --fs-hero:    clamp(2.4rem,    5.2vw,             4.6rem);
  --fs-score:   clamp(4.5rem,    10vw,              8rem);

  /* --- Межстрочные --- */
  --lh-tight:   1.1;
  --lh-snug:    1.4;
  --lh-base:    1.55;
  --lh-body:    1.65;

  /* --- Трекинг --- */
  --tr-tight:   -0.04em;
  --tr-display: -0.03em;
  --tr-heading: -0.02em;
  --tr-base:    -0.015em;
  --tr-btn:     -0.005em;
  --tr-body:    0.005em;
  --tr-eyebrow: 0.18em;
  --tr-tag:     0.04em;
  --tr-link:    0.08em;

  /* --- Радиусы --- */
  --r-sm:    clamp(3px,  0.4vw,  5px);
  --r:       clamp(8px,  0.75vw, 12px);
  --r-lg:    clamp(14px, 1.5vw,  20px);
  --r-pill:  clamp(50px, 8vw,   100px);

  /* --- Внутренние отступы (padding) --- */
  --pad-2:   clamp(4px,  0.4vw,  6px);
  --pad-4:   clamp(8px,  0.9vw,  12px);
  --pad-5:   clamp(10px, 1vw,    14px);
  --pad-6:   clamp(12px, 1.3vw,  18px);
  --pad-7:   clamp(14px, 1.5vw,  20px);
  --pad-8:   clamp(18px, 2vw,    26px);
  --pad-9:   clamp(24px, 2.5vw,  36px);

  /* --- Поля и зазоры (margin/gap) --- */
  --gap-3:   clamp(6px,  0.7vw,  10px);
  --gap-4:   clamp(8px,  1vw,    12px);
  --gap-5:   clamp(10px, 1.2vw,  14px);
  --gap-6:   clamp(12px, 1.4vw,  18px);
  --gap-8:   clamp(20px, 2.2vw,  28px);
  --gap-9:   clamp(24px, 2.6vw,  36px);
  --gap-10:  clamp(32px, 3.2vw,  48px);
  --gap-11:  clamp(40px, 5vw,    64px);
  --gap-12:  clamp(60px, 9vw,   140px);

  /* --- Стороны (максимальные ширины, позиционирование) --- */
  --pad-x:        clamp(14px, 2.5vw, 24px);
  --container:    1200px;
  --container-sm: 880px;
  --section-head: 760px;
  --hero-h:       clamp(60px, 7vh, 76px);
  --to-top-size:  clamp(40px, 3.2vw, 48px);
  --to-top-edge:  clamp(16px, 2vw, 28px);

  /* --- Длительности --- */
  --dur-fast: 0.15s;
  --dur-base: 0.25s;
  --dur-reveal: 0.8s;
  --ease:     cubic-bezier(0.22, 0.61, 0.36, 1);

  /* --- Z-индексы --- */
  --z-to-top: 90;
  --z-header: 100;
  --z-skiplink: 999;
}

/* --- RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: clamp(60px, 8vh, 90px);
}

body {
  font-family: var(--font-family);
  font-size: var(--fs-base);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1, "liga" 1, "tnum" 1;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
img, svg { display: block; max-width: 100%; }

::selection { background: var(--color-accent); color: var(--color-bg); }

.skip-link {
  position: absolute; top: -100px; left: 0;
  background: var(--color-accent); color: var(--color-white);
  padding: var(--pad-4) var(--pad-7);
  z-index: var(--z-skiplink);
}
.skip-link:focus { top: 0; }

/* --- TYPOGRAPHY HELPERS --- */
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--gap-5);
  font-size: clamp(0.95rem, 0.7vw + 0.75rem, 1.15rem);
  letter-spacing: var(--tr-eyebrow);
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 500;
}
.eyebrow__mark {
  font-style: italic;
  color: var(--color-citation);
  font-size: 1.1em;
}
.eyebrow--light { color: rgba(252, 251, 249, 0.7); }
.eyebrow--light .eyebrow__mark { color: #d8a8b1; }

.section-title {
  font-size: var(--fs-section);
  line-height: var(--lh-tight);
  font-weight: 500;
  letter-spacing: var(--tr-heading);
  color: var(--color-text);
  max-width: 18ch;
}
.section-title em {
  font-style: italic;
  color: var(--color-citation);
  font-weight: 500;
}
.section-sub {
  max-width: 60ch;
  color: var(--color-text-muted);
  font-size: var(--fs-base);
  line-height: var(--lh-body);
  margin-top: var(--gap-4);
}

.section__head {
  margin-bottom: var(--gap-11);
  max-width: var(--section-head);
}
.section__head--center {
  margin-left: auto; margin-right: auto;
  text-align: center;
}
.section__head--center .section-title,
.section__head--center .section-sub   { margin-left: auto; margin-right: auto; }

/* --- CONTAINER --- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* --- BRAND --- */
.brand {
  display: inline-flex; align-items: center; gap: var(--gap-3);
  font-size: var(--fs-xl);
  font-weight: 500;
  letter-spacing: var(--tr-display);
  color: var(--color-text);
  line-height: 1;
  white-space: nowrap;
}
.brand--sm { font-size: var(--fs-base); letter-spacing: var(--tr-heading); font-weight: 500; }
.brand__dot {
  width: clamp(6px, 0.5vw, 8px);
  height: clamp(6px, 0.5vw, 8px);
  border-radius: 50%;
  background: var(--color-citation);
  box-shadow: 0 0 0 clamp(3px, 0.4vw, 5px) rgba(138, 37, 53, 0.12);
  flex-shrink: 0;
}
.brand__q { color: var(--color-citation); font-weight: 500; }

/* --- BUTTONS --- */
.btn {
  display: inline-flex; align-items: center; gap: var(--gap-3);
  padding: var(--pad-5) var(--pad-7);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: var(--tr-btn);
  border-radius: var(--r);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: opacity var(--dur-base) var(--ease),
              background var(--dur-base) var(--ease),
              color var(--dur-base) var(--ease),
              transform var(--dur-base) var(--ease);
}
.btn svg { width: clamp(14px, 1.1vw, 17px); height: clamp(14px, 1.1vw, 17px); }
.btn-lg {
  padding: var(--pad-7) var(--pad-8);
  font-size: var(--fs-md);
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}
.btn-primary:hover  { background: #3a3935; border-color: #3a3935; }
.btn-primary:active { transform: translateY(1px); }
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-ghost:hover { background: var(--color-surface); border-color: var(--color-text); }

/* --- HEADER --- */
.site-header {
  position: sticky; top: 0; left: 0; right: 0;
  z-index: var(--z-header);
  background: rgba(244, 241, 234, 0.85);
  backdrop-filter: saturate(160%) blur(clamp(6px, 0.7vw, 12px));
  -webkit-backdrop-filter: saturate(160%) blur(clamp(6px, 0.7vw, 12px));
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-base), background var(--dur-base);
}
.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  background: rgba(244, 241, 234, 0.94);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--gap-6);
  height: var(--hero-h);
}
.site-nav {
  display: flex; gap: clamp(20px, 2.5vw, 36px);
}
.site-nav a {
  position: relative;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  padding: var(--pad-2) 0;
  transition: color var(--dur-base);
}
.site-nav a:hover { color: var(--color-text); }
.site-nav a::after {
  content: '';
  position: absolute; left: 0; right: 100%; bottom: 0;
  height: 1px;
  background: var(--color-citation);
  transition: right var(--dur-base) var(--ease);
}
.site-nav a:hover::after { right: 0; }

.site-header__actions {
  display: flex; align-items: center; gap: var(--gap-4);
}
.site-header__actions .btn {
  padding: clamp(5px, 0.5vw, 8px) clamp(10px, 1.1vw, 14px);
  font-size: var(--fs-2xs);
}

.burger {
  display: none;
  width: clamp(38px, 3.2vw, 44px);
  height: clamp(38px, 3.2vw, 44px);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--r);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(3px, 0.4vw, 5px);
  padding: 0;
  transition: border-color var(--dur-base);
}
.burger:hover { border-color: var(--color-text); }
.burger span {
  display: block;
  width: clamp(16px, 1.2vw, 20px);
  height: 1.5px;
  background: var(--color-text);
  transition: transform var(--dur-base), opacity var(--dur-base);
}
.burger.is-open span:nth-child(1) { transform: translateY(clamp(4px, 0.5vw, 7px)) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(clamp(-7px, -0.5vw, -4px)) rotate(-45deg); }

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: var(--gap-4);
  padding: var(--pad-7) var(--pad-x) var(--pad-9);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}
.mobile-nav a {
  padding: var(--pad-5) 0;
  color: var(--color-text);
  font-size: var(--fs-md);
  border-bottom: 1px solid var(--color-border);
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav.is-open { display: flex; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  padding-top: clamp(40px, 8vh, 100px);
  padding-bottom: clamp(60px, 10vh, 120px);
  overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.hero__grain {
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200' viewBox='0 0 200 200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.16 0 0 0 0 0.16 0 0 0 0 0.15 0 0 0 0.45 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  opacity: 0.4;
  mix-blend-mode: multiply;
}
.hero__ornament {
  position: absolute;
  color: var(--color-text);
  opacity: 0.06;
}
.hero__ornament--tl {
  top: clamp(-60px, -4vw, -20px); left: clamp(-80px, -5vw, -30px);
  width: clamp(200px, 24vw, 320px);
  height: auto;
}
.hero__ornament--br {
  bottom: clamp(-30px, -2vw, -10px); right: clamp(-50px, -3vw, -20px);
  width: clamp(140px, 16vw, 220px);
  height: auto;
}

.hero__inner {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(420px, 100%), 1fr));
  gap: clamp(40px, 6vw, 90px);
  align-items: center;
}

.hero__title {
  font-size: var(--fs-hero);
  line-height: 1.04;
  font-weight: 500;
  letter-spacing: var(--tr-display);
  color: var(--color-text);
  margin-top: var(--gap-6);
  max-width: 18ch;
}
.hero__title em {
  font-style: italic;
  color: var(--color-citation);
  font-weight: 500;
}

.hero__lead {
  margin-top: var(--gap-6);
  max-width: 56ch;
  color: var(--color-text-muted);
  font-size: var(--fs-md);
  line-height: var(--lh-body);
}

.hero__lead-name {
  color: var(--color-text);
  font-weight: 600;
  white-space: nowrap;
}

.hero__cta {
  margin-top: var(--gap-9);
  display: flex; flex-wrap: wrap;
  gap: var(--gap-6);
}

.hero__stats {
  margin-top: clamp(40px, 5vw, 64px);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(180px, 100%), 1fr));
  gap: clamp(16px, 2vw, 32px);
  padding-top: var(--gap-6);
  border-top: 1px solid var(--color-border);
}
.stat dt {
  font-size: var(--fs-2xl);
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: var(--tr-heading);
  line-height: var(--lh-tight);
}
.stat dd {
  font-size: var(--fs-2xs);
  color: var(--color-text-muted);
  margin-top: clamp(4px, 0.5vw, 6px);
  line-height: var(--lh-snug);
}

/* --- Chat mockup --- */
.chat-mock { position: relative; perspective: 1500px; }
.chat-mock__panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow:
    0 1px 2px var(--color-shadow-sm),
    0 clamp(16px, 2vw, 28px) clamp(40px, 5vw, 64px) clamp(-14px, -1.5vw, -20px) var(--color-shadow-md),
    0 clamp(28px, 3vw, 48px) clamp(56px, 7vw, 88px) clamp(-22px, -2.5vw, -30px) var(--color-shadow-md);
  transform: rotate(0.6deg);
  position: relative;
  z-index: 1;
}
.chat-mock__head {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--pad-7) var(--pad-8);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}
.badge {
  font-size: var(--fs-2xs);
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--r-pill);
  padding: clamp(2px, 0.3vw, 4px) var(--pad-5);
  letter-spacing: var(--tr-tag);
}

.chat-mock__body {
  padding: var(--pad-8);
  display: flex; flex-direction: column;
  gap: var(--gap-6);
  background: linear-gradient(to bottom, var(--color-surface), var(--color-bg));
  min-height: clamp(160px, 20vh, 220px);
}

.bubble {
  max-width: 88%;
  padding: var(--pad-5) var(--pad-7);
  border-radius: var(--r-lg);
  line-height: var(--lh-base);
  font-size: var(--fs-sm);
  font-family: var(--font-family);
}
.bubble p            { margin-bottom: 0.6em; }
.bubble p:last-child { margin-bottom: 0; }
.bubble--user {
  align-self: flex-end;
  background: var(--color-bubble-user);
  color: var(--color-white);
  border-bottom-right-radius: var(--r-sm);
}
.bubble--ai {
  align-self: flex-start;
  background: var(--color-bubble-ai);
  color: var(--color-text);
  border-bottom-left-radius: var(--r-sm);
  font-size: var(--fs-sm);
}

.citation {
  color: var(--color-citation);
  border-bottom: 1px solid var(--color-citation-border);
  padding: 0 clamp(2px, 0.2vw, 3px);
  transition: background var(--dur-fast);
  cursor: pointer;
}
.citation:hover { background: var(--color-citation-bg-hover); }

.chat-mock__input {
  display: flex; align-items: center;
  gap: var(--gap-3);
  margin: 0 var(--pad-7) var(--pad-7);
  padding: var(--pad-6) var(--pad-7);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--r);
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  font-family: var(--font-family-mono);
}
.chat-mock__caret {
  display: inline-block;
  width: 1.5px; height: 1em;
  background: var(--color-text);
  animation: blink 1.1s steps(2, end) infinite;
  vertical-align: text-bottom;
}
@keyframes blink {
  0%, 50% { opacity: 1; }
  50.01%, 100% { opacity: 0; }
}

/* ============================================================
   SECTION
   ============================================================ */
.section {
  padding-top: var(--gap-12);
  padding-bottom: var(--gap-12);
}
.section + .section { border-top: 1px solid var(--color-border); }

/* ============================================================
   ASK
   ============================================================ */
.tips {
  display: flex; flex-direction: column;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  max-width: var(--container-sm);
  margin: 0 auto;
}
.tip {
  background: var(--color-surface);
  padding: clamp(20px, 2.2vw, 28px) clamp(20px, 2.6vw, 32px);
  display: flex; flex-direction: column;
  gap: clamp(10px, 1.2vw, 16px);
  transition: background var(--dur-base);
}
.tip:hover { background: #fdfcf8; }
.tip__title {
  font-size: var(--fs-md);
  font-weight: 600;
  letter-spacing: var(--tr-base);
  color: var(--color-text);
  line-height: var(--lh-snug);
}
.tip__text {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
  line-height: var(--lh-body);
}
.tip__examples {
  display: flex; flex-direction: column;
  gap: clamp(8px, 0.9vw, 12px);
  padding: clamp(12px, 1.5vw, 18px);
  background: var(--color-bg);
  border-radius: var(--r);
  font-size: var(--fs-sm);
  line-height: var(--lh-base);
  color: var(--color-text);
}
.tip__example {
  display: flex; align-items: flex-start;
  gap: clamp(8px, 1vw, 14px);
}
.tip__example span:last-child { flex: 1; }
.tip__label {
  flex-shrink: 0;
  font-family: var(--font-family-mono);
  font-size: var(--fs-2xs);
  letter-spacing: var(--tr-link);
  text-transform: uppercase;
  padding: clamp(3px, 0.4vw, 5px) clamp(7px, 0.7vw, 10px);
  border-radius: var(--r-pill);
  font-weight: 700;
  line-height: 1;
  margin-top: clamp(1px, 0.2vw, 3px);
}
.tip__label--bad  { background: rgba(189, 99, 36, 0.14); color: var(--color-miss); }
.tip__label--good { background: rgba(35, 34, 31, 0.08);   color: var(--color-accent); }

.ask__note {
  margin: var(--gap-9) auto 0;
  display: flex; align-items: center; justify-content: center;
  width: fit-content;
  max-width: 100%;
  gap: var(--gap-4);
  padding: clamp(8px, 0.8vw, 12px) clamp(14px, 1.5vw, 20px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--r-pill);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  letter-spacing: var(--tr-body);
}
.ask__note-icon {
  width: clamp(14px, 1.1vw, 17px);
  height: clamp(14px, 1.1vw, 17px);
  color: var(--color-citation);
  flex-shrink: 0;
}

/* ============================================================
   RESULTS
   ============================================================ */
.results {
  position: relative;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.results .section__head {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
  max-width: var(--section-head);
  position: relative;
  padding-top: clamp(24px, 3.5vw, 40px);
}
.results .section__head .section-title,
.results .section__head .section-sub,
.results .section__head .eyebrow {
  margin-left: auto;
  margin-right: auto;
}
.results .section__head::before {
  content: '';
  display: block;
  width: clamp(56px, 7vw, 96px);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-citation), transparent);
  margin: 0 auto var(--gap-8);
}

.results__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(360px, 100%), 1fr));
  gap: clamp(20px, 2.5vw, 32px);
}
.score-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--r-lg);
  padding: clamp(28px, 3.5vw, 48px);
  display: flex; flex-direction: column;
  gap: clamp(18px, 2vw, 26px);
  overflow: hidden;
  box-shadow: 0 1px 2px var(--color-shadow-sm),
              0 clamp(8px, 1.2vw, 14px) clamp(20px, 2.5vw, 32px) clamp(-14px, -1.5vw, -20px) var(--color-shadow-md);
  transition: transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
}
.score-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 clamp(16px, 2vw, 28px) clamp(36px, 4.5vw, 56px) clamp(-28px, -3vw, -22px) var(--color-shadow-md);
}
.score-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-citation), transparent);
  opacity: 0.9;
}
.score-card--alt::before {
  background: linear-gradient(90deg, transparent, var(--color-text-muted), transparent);
}
@media (min-width: 768px) {
  .score-card__head { min-height: 7em; }
}
.score-card__track {
  font-size: var(--fs-lg);
  font-weight: 500;
  letter-spacing: var(--tr-base);
  color: var(--color-text);
  line-height: 1.3;
}
.score-card__score {
  display: flex; align-items: baseline;
  gap: clamp(4px, 0.5vw, 6px);
  padding: clamp(10px, 1.2vw, 16px) 0 0;
  border-top: 1px solid var(--color-border);
}
.score-card__num {
  font-style: italic;
  font-size: var(--fs-score);
  font-weight: 500;
  color: var(--color-citation);
  line-height: 0.9;
  letter-spacing: var(--tr-tight);
}
.score-card--alt .score-card__num { color: var(--color-text); }
.score-card__of { font-size: var(--fs-lg); color: var(--color-text-muted); font-weight: 500; }
.score-card__place {
  font-weight: 600;
  border-bottom: 1px solid var(--color-citation);
  margin-right: 0.25em;
}
.score-card__note {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  line-height: var(--lh-base);
}
.score-card__source {
  margin-top: auto;
  padding-top: clamp(10px, 1.2vw, 16px);
  border-top: 1px solid var(--color-border);
  font-size: var(--fs-2xs);
  color: var(--color-text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: clamp(3px, 0.4vw, 5px);
  align-items: center;
}
.score-card__source a {
  color: var(--color-citation);
  text-decoration: none;
  border-bottom: 1px solid var(--color-citation-border);
  padding: 0 clamp(2px, 0.2vw, 3px);
  border-radius: clamp(1px, 0.2vw, 3px);
  transition: background var(--dur-fast);
}
.score-card__source a:hover {
  background: var(--color-citation-bg-hover);
}

/* ============================================================
   STACK
   ============================================================ */
.stack__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
  gap: clamp(20px, 2.5vw, 32px);
}
.tech-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--r-lg);
  padding: clamp(24px, 2.5vw, 36px);
  display: flex; flex-direction: column;
  gap: clamp(8px, 1vw, 12px);
  transition: border-color var(--dur-base), transform var(--dur-base) var(--ease);
}
.tech-card:hover { border-color: var(--color-citation); transform: translateY(-2px); }
.tech-card h3 {
  font-size: var(--fs-xl);
  font-weight: 600;
  letter-spacing: var(--tr-base);
  color: var(--color-text);
}
.tech-card p {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
  line-height: var(--lh-body);
}
.tech-card__step {
  display: block;
  font-size: var(--fs-xl);
  font-weight: 500;
  color: var(--color-citation);
  letter-spacing: var(--tr-base);
  font-feature-settings: "tnum" 1;
  margin-bottom: clamp(4px, 0.5vw, 6px);
  line-height: 1;
}
.how__note {
  margin-top: clamp(20px, 2.5vw, 32px);
  max-width: 64ch;
  margin-left: auto;
  margin-right: auto;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  text-align: center;
  line-height: var(--lh-base);
}

/* ============================================================
   CTA
   ============================================================ */
.cta {
  padding-top: var(--gap-10);
  padding-bottom: var(--gap-12);
}
.cta__card {
  position: relative;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--r-lg);
  padding: clamp(40px, 6vw, 80px);
  text-align: center;
  overflow: hidden;
}
.cta__card::before,
.cta__card::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(252, 251, 249, 0.08);
  pointer-events: none;
}
.cta__card::before {
  top: clamp(-110px, -8vw, -60px); left: clamp(-110px, -8vw, -60px);
  width: clamp(220px, 22vw, 320px);
  height: clamp(220px, 22vw, 320px);
}
.cta__card::after {
  bottom: clamp(-160px, -12vw, -90px); right: clamp(-160px, -12vw, -90px);
  width: clamp(280px, 28vw, 400px);
  height: clamp(280px, 28vw, 400px);
  border-color: rgba(138, 37, 53, 0.25);
}
.cta__title {
  font-size: var(--fs-cta);
  font-weight: 500;
  line-height: var(--lh-tight);
  letter-spacing: var(--tr-display);
  margin-top: var(--gap-6);
  position: relative;
}
.cta__text {
  max-width: 50ch;
  margin: var(--gap-6) auto 0;
  color: rgba(252, 251, 249, 0.7);
  font-size: var(--fs-md);
  line-height: var(--lh-body);
  position: relative;
}
.cta__row {
  margin-top: var(--gap-9);
  display: inline-flex; flex-wrap: wrap; justify-content: center;
  align-items: center;
  gap: clamp(12px, 1.5vw, 20px);
  position: relative;
}
.cta__card .btn-primary {
  background: var(--color-white);
  color: var(--color-accent);
  border-color: var(--color-white);
}
.cta__card .btn-primary:hover { background: #f4f1ea; border-color: #f4f1ea; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: clamp(28px, 4vw, 44px) 0 clamp(24px, 3vw, 36px);
}
.site-footer__inner {
  text-align: right;
}
.site-footer__copy {
  font-size: var(--fs-2xs);
  color: var(--color-text-muted);
  letter-spacing: var(--tr-tag);
}

/* --- TO TOP --- */
.to-top {
  position: fixed;
  bottom: var(--to-top-edge);
  right: var(--to-top-edge);
  width: var(--to-top-size);
  height: var(--to-top-size);
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 clamp(8px, 1vw, 14px) clamp(20px, 2.5vw, 32px) clamp(-12px, -1vw, -8px) var(--color-shadow-lg);
  opacity: 0;
  transform: translateY(clamp(4px, 0.6vw, 10px));
  pointer-events: none;
  transition: opacity var(--dur-base), transform var(--dur-base), background var(--dur-base);
  z-index: var(--z-to-top);
}
.to-top.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { background: var(--color-citation); }
.to-top svg { width: clamp(16px, 1.2vw, 19px); height: clamp(16px, 1.2vw, 19px); }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(clamp(12px, 1.5vw, 24px));
  transition: opacity var(--dur-reveal) var(--ease), transform var(--dur-reveal) var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .chat-mock__caret { animation: none; }
  * { transition: none !important; }
}

/* ============================================================
   ЕДИНСТВЕННЫЙ breakpoint — переключение nav/burger.
   Все остальные адаптации — clamp + auto-fit.
   ============================================================ */
@media (max-width: 720px) {
  .site-nav                                    { display: none; }
  .site-header__actions .btn                   { display: none; }
  .burger                                      { display: flex; }
  .hero__title                                 { max-width: none; }
}