/* ==========================================================================
   Atmos Group × E.Tofan — Комплексный маркетинг. КП landing.
   Design tokens sourced from DESIGN-2.md (brutalist-editorial, warm canvas),
   typography overridden per brief: Benzin (self-hosted, Bold/ExtraBold) for
   display, Montserrat for body/UI text, JetBrains Mono for micro-labels.
   Mobile is the primary target; desktop is the enhancement.
   ========================================================================== */

@font-face {
  font-family: 'Benzin';
  src: url('fonts/Benzin-Bold.ttf') format('truetype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Benzin';
  src: url('fonts/Benzin-ExtraBold.ttf') format('truetype');
  font-weight: 800;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Colors */
  --color-carbon-black: #000000;
  --color-paper-white: #ffffff;
  --color-warm-canvas: #e5e5e5;
  --color-mist-gray: #f3f3f3;
  --color-ash: #c6c6c6;
  --color-smoke: #979797;
  --color-slate: #3a3a3a;
  --color-graphite: #2f2f2f;
  --color-mint-chip: #d1ffca;
  --color-voltage-yellow: #fff100;

  /* Typography */
  --font-display: 'Benzin', ui-sans-serif, system-ui, sans-serif;
  --font-body: 'Montserrat', ui-sans-serif, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, monospace;

  --text-caption: 12px;
  --text-body-sm: 15px;
  --text-body: 17px;
  --text-subheading: 19px;
  --text-subheading-lg: 21px;
  --text-heading-sm: 28px;
  --text-heading: 40px;
  --text-heading-lg: clamp(1.75rem, 7vw + 0.2rem, 3rem);
  --text-display: clamp(2.75rem, 3.2vw + 1.6rem, 5rem);
  --text-display-xl: clamp(2.75rem, 6vw + 1rem, 4.75rem);

  /* Spacing */
  --spacing-8: 8px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-40: 40px;
  --spacing-64: 64px;
  --spacing-80: 80px;
  --spacing-96: 96px;

  /* Radius */
  --radius-buttons: 8px;
  --radius-cards: 28px;
  --radius-large-cards: 48px;
  --radius-nav-pill: 48px;
  --radius-tags: 64px;

  /* Layout */
  --page-max-width: 1200px;
  --section-gap: 72px;

  /* Surfaces */
  --surface-canvas: #e5e5e5;
  --surface-card: #ffffff;
  --surface-inverted: #000000;
  --surface-mist: #f3f3f3;

  color-scheme: light;
}

@media (min-width: 640px) {
  :root { --section-gap: 80px; --radius-large-cards: 64px; }
}

/* ---- Reset ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}
body {
  margin: 0;
  background: var(--surface-canvas);
  color: var(--color-carbon-black);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--text-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; cursor: pointer; }

.wrap {
  width: 100%;
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 0 20px;
}
@media (min-width: 640px) { .wrap { padding: 0 32px; } }
@media (min-width: 900px) { .wrap { padding: 0 40px; } }

/* ---- Typography ------------------------------------------------------ */
.display {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  line-height: 0.94;
  letter-spacing: -0.01em;
  overflow-wrap: break-word;
  word-break: break-word;
}
.display--xl { font-size: var(--text-display-xl); }
.display--lg { font-size: var(--text-heading-lg); }
h2.display, h3.display { margin: 0; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-slate);
  margin: 0 0 16px;
}

.lede {
  font-size: var(--text-subheading-lg);
  font-weight: 500;
  color: var(--color-slate);
  line-height: 1.45;
  max-width: 46ch;
  margin: 0;
}

.body-copy {
  color: var(--color-slate);
  font-weight: 400;
  font-size: var(--text-body);
  line-height: 1.6;
  max-width: 60ch;
  margin: 0;
}

/* ---- Buttons ----------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  border-radius: var(--radius-buttons);
  padding: 14px 26px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-body);
  text-decoration: none;
  border: none;
  transition: transform 0.15s ease, background 0.15s ease, opacity 0.15s ease;
}
.btn:active { transform: translateY(1px) scale(0.98); }
.btn--dark { background: var(--color-carbon-black); color: var(--color-paper-white); }
.btn--dark:hover { opacity: 0.85; }
.btn--ghost { background: transparent; border: 1.5px solid var(--color-slate); color: var(--color-slate); padding: 12px 24px; }
.btn--ghost:hover { border-color: var(--color-carbon-black); color: var(--color-carbon-black); }
.btn--light { background: var(--color-paper-white); color: var(--color-carbon-black); }
.btn--light:hover { background: var(--color-mint-chip); }
.btn--text { background: none; padding: 0; color: var(--color-carbon-black); font-weight: 600; text-underline-offset: 3px; }
.btn--text:hover { text-decoration: underline; }

/* ---- Nav ---------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 14px 0;
  background: linear-gradient(var(--surface-canvas) 65%, transparent);
}
@media (min-width: 640px) { .nav { padding: 20px 0; } }
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--surface-card);
  border-radius: var(--radius-nav-pill);
  padding: 8px 8px 8px 16px;
  min-height: 58px;
}
@media (min-width: 640px) { .nav__inner { padding: 10px 12px 10px 20px; min-height: 64px; } }
.nav__brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 15px; letter-spacing: -0.01em; white-space: nowrap; overflow: hidden; }
.nav__brand img { height: 22px; width: auto; flex-shrink: 0; filter: brightness(0); }
.nav__brand span { display: none; }
@media (min-width: 480px) { .nav__brand span { display: inline; } }
@media (min-width: 640px) { .nav__brand img { height: 26px; } .nav__brand { font-size: 16px; } }
.nav__links { display: none; gap: 26px; list-style: none; margin: 0; padding: 0; font-size: 15px; font-weight: 500; color: var(--color-slate); }
.nav__links a { text-decoration: none; }
.nav__links a:hover { color: var(--color-carbon-black); }
@media (min-width: 1024px) { .nav__links { display: flex; } }
.nav__actions { display: flex; align-items: center; gap: 8px; }
.lang-toggle {
  display: none;
  background: var(--surface-mist);
  border-radius: var(--radius-tags);
  padding: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  flex-shrink: 0;
}
@media (min-width: 560px) { .lang-toggle { display: flex; } }
.lang-toggle button {
  border: none;
  background: transparent;
  padding: 6px 12px;
  border-radius: var(--radius-tags);
  color: var(--color-smoke);
}
.lang-toggle button[aria-pressed="true"] { background: var(--color-carbon-black); color: var(--color-paper-white); }
.nav .btn--dark { padding: 9px 16px; font-size: 14px; }
@media (min-width: 640px) { .nav .btn--dark { padding: 10px 20px; font-size: 15px; } }

/* ---- Sections shell ------------------------------------------------------ */
section { padding: var(--section-gap) 0; overflow-x: clip; }
.section-canvas { background: var(--surface-canvas); }
.section-mist { background: var(--surface-mist); }
.section-inverted { background: var(--surface-inverted); color: var(--color-paper-white); }
.section-inverted .body-copy { color: var(--color-ash); }
.section-inverted .lede { color: var(--color-ash); }

/* ---- Hero -------------------------------------------------------------- */
.hero { padding-top: 32px; padding-bottom: var(--section-gap); }
@media (min-width: 640px) { .hero { padding-top: 48px; } }
.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}
@media (min-width: 900px) {
  .hero__grid { grid-template-columns: minmax(0, 1.8fr) minmax(280px, 1fr); gap: 48px; }
}
.hero__content { min-width: 0; container-type: inline-size; }
.hero__headline { margin: 0 0 20px; overflow-wrap: break-word; font-size: clamp(2.2rem, 11cqi, 4.75rem); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.hero__figure {
  position: relative;
  border-radius: var(--radius-large-cards);
  overflow: hidden;
  aspect-ratio: 4 / 3.4;
  background: var(--color-graphite);
}
.hero__figure img { width: 100%; height: 100%; object-fit: cover; }
@media (min-width: 900px) { .hero__figure { aspect-ratio: 4 / 5; } }

/* ---- Partner logos (static grid, no auto-scroll: nothing should get missed) -- */
.partners-card {
  background: var(--surface-card);
  border-radius: var(--radius-cards);
  padding: 28px 20px;
}
@media (min-width: 640px) { .partners-card { padding: 32px; } }
.partners-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px 20px;
  align-items: center;
  justify-items: center;
}
@media (min-width: 480px) { .partners-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 768px) { .partners-grid { grid-template-columns: repeat(5, 1fr); gap: 32px 28px; } }
.partners-grid img { height: 30px; width: auto; max-width: 100%; object-fit: contain; filter: grayscale(0.3); opacity: 0.95; }
@media (min-width: 640px) { .partners-grid img { height: 40px; } }

/* ---- Section header ------------------------------------------------------- */
.section-head { max-width: 620px; margin-bottom: 40px; }
@media (min-width: 640px) { .section-head { margin-bottom: 48px; } }
.section-head .display { margin-bottom: 16px; }

/* ---- Service section (image split) ---------------------------------------- */
.service {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}
@media (min-width: 900px) {
  .service { grid-template-columns: minmax(0, 1fr) minmax(260px, 1fr); gap: 56px; align-items: center; }
  .service--reverse .service__media { order: 2; }
}
.service > div:first-child { min-width: 0; }
.service__media { border-radius: var(--radius-large-cards); overflow: hidden; }
.service__media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; }
.service__price {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  background: var(--color-mint-chip);
  border-radius: var(--radius-tags);
  padding: 8px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  margin-bottom: 18px;
}
.service__price strong { font-family: var(--font-body); font-size: 16px; font-weight: 700; }
.service h3.display { font-size: var(--text-heading-lg); margin-bottom: 14px; }
.service__note {
  margin-top: 22px;
  padding: 16px 20px;
  border-radius: 16px;
  background: var(--color-mist-gray);
  font-size: var(--text-body-sm);
  color: var(--color-slate);
  line-height: 1.55;
}
.service__note strong { color: var(--color-carbon-black); font-weight: 700; }
.section-inverted .service__note { background: var(--color-graphite); color: var(--color-ash); }
.section-inverted .service__note strong { color: var(--color-paper-white); }

.chip-grid { display: grid; grid-template-columns: 1fr; gap: 10px; margin: 22px 0 0; padding: 0; list-style: none; }
@media (min-width: 560px) { .chip-grid { grid-template-columns: 1fr 1fr; } }
.chip-grid li {
  background: var(--surface-card);
  border-radius: 18px;
  padding: 16px 18px;
  font-size: var(--text-body-sm);
  font-weight: 500;
  color: var(--color-graphite);
  line-height: 1.5;
}
.section-inverted .chip-grid li { background: var(--color-graphite); color: var(--color-ash); }

.addon-card {
  margin-top: 26px;
  background: var(--color-carbon-black);
  color: var(--color-paper-white);
  border-radius: var(--radius-cards);
  padding: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
}
@media (min-width: 640px) { .addon-card { padding: 28px; } }
.addon-card__text h4 { margin: 0 0 6px; font-family: var(--font-body); font-weight: 700; font-size: var(--text-subheading-lg); }
.addon-card__text p { margin: 0; color: var(--color-ash); font-size: var(--text-body-sm); line-height: 1.55; max-width: 46ch; }
.addon-card__price { font-family: var(--font-mono); font-size: 14px; background: var(--color-voltage-yellow); color: var(--color-carbon-black); padding: 8px 16px; border-radius: var(--radius-tags); white-space: nowrap; }

/* ---- Funnel diagram (target section) --------------------------------------- */
.funnel { display: flex; flex-direction: column; gap: 6px; max-width: 420px; margin: 28px 0; }
.funnel__stage {
  background: var(--color-carbon-black);
  color: var(--color-paper-white);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  padding: 15px 20px;
  text-align: center;
  clip-path: polygon(6% 0, 94% 0, 88% 100%, 12% 100%);
}
.funnel__stage:nth-child(1) { width: 100%; background: var(--color-carbon-black); }
.funnel__stage:nth-child(2) { width: 86%; margin-left: 7%; background: var(--color-graphite); }
.funnel__stage:nth-child(3) { width: 68%; margin-left: 16%; background: var(--color-slate); }
.funnel__stage:nth-child(4) { width: 48%; margin-left: 26%; background: var(--color-voltage-yellow); color: var(--color-carbon-black); clip-path: none; border-radius: 8px; }

.budget-note {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--surface-card);
  border-radius: 18px;
  padding: 18px 20px;
  font-size: var(--text-body-sm);
  color: var(--color-slate);
  max-width: 460px;
}
.budget-note strong { color: var(--color-carbon-black); }

.platform-note {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--color-mint-chip);
  border-radius: 18px;
  padding: 18px 20px;
  font-size: var(--text-body-sm);
  color: var(--color-graphite);
  max-width: 460px;
  margin-top: 18px;
}
.platform-note strong { color: var(--color-carbon-black); font-weight: 700; }

/* ---- Pricing summary ------------------------------------------------------ */
.summary-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.summary-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  background: var(--surface-card);
  padding: 20px 22px;
}
@media (min-width: 640px) { .summary-row { padding: 22px 26px; } }
.summary-row:first-child { border-radius: 20px 20px 4px 4px; }
.summary-row:last-of-type { border-radius: 4px 4px 20px 20px; }
.summary-row__name { font-weight: 700; font-size: var(--text-subheading-lg); }
.summary-row__meta { color: var(--color-smoke); font-size: var(--text-body-sm); }
.summary-row__price { font-family: var(--font-mono); font-size: var(--text-subheading-lg); white-space: nowrap; }
.summary-total {
  margin-top: 4px;
  background: var(--color-carbon-black);
  color: var(--color-paper-white);
  border-radius: 20px;
  padding: 24px 22px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
@media (min-width: 640px) { .summary-total { padding: 26px; } }
.summary-total__label { font-family: var(--font-display); text-transform: uppercase; font-size: var(--text-heading-sm); letter-spacing: -0.01em; }
.summary-total__value { font-family: var(--font-mono); font-size: var(--text-heading-sm); color: var(--color-mint-chip); }
.summary-addons { margin-top: 20px; font-size: var(--text-body-sm); color: var(--color-slate); line-height: 1.6; }
.summary-addons span { display: block; margin-top: 6px; }

/* ---- Process timeline ------------------------------------------------------ */
.timeline { display: grid; grid-template-columns: 1fr; gap: 28px; margin-top: 44px; }
@media (min-width: 560px) { .timeline { grid-template-columns: repeat(2, 1fr); gap: 24px; } }
@media (min-width: 1080px) { .timeline { grid-template-columns: repeat(5, 1fr); } }
.timeline__step { border-top: 2px solid var(--color-carbon-black); padding-top: 18px; }
.timeline__index { font-family: var(--font-mono); font-size: 13px; color: var(--color-smoke); }
.timeline__title { font-family: var(--font-body); font-weight: 700; font-size: var(--text-subheading-lg); margin: 10px 0 8px; }
.timeline__body { color: var(--color-slate); font-size: var(--text-body-sm); line-height: 1.5; margin: 0; }
.timeline__note {
  margin-top: 28px;
  background: var(--surface-card);
  border-radius: 18px;
  padding: 18px 20px;
  font-size: var(--text-body-sm);
  color: var(--color-slate);
  line-height: 1.6;
  max-width: 640px;
}
.timeline__note strong { color: var(--color-carbon-black); }

/* ---- Closing CTA ------------------------------------------------------------ */
.cta-block { border-radius: var(--radius-large-cards) var(--radius-large-cards) 0 0; }
.cta-inner { text-align: center; max-width: 640px; margin: 0 auto; }
.cta-inner .display { margin-bottom: 20px; }
.cta-inner .lede { margin: 0 auto 32px; color: var(--color-ash); }
.cta-actions { display: flex; justify-content: center; }

footer { background: var(--color-carbon-black); color: var(--color-ash); padding: 32px 0 40px; }
.footer-top { font-weight: 700; color: var(--color-paper-white); margin-bottom: 4px; font-size: var(--text-body); }
.footer-brand { font-size: var(--text-body-sm); color: var(--color-smoke); margin-bottom: 24px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; font-size: var(--text-body-sm); }
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--color-paper-white); }

/* ---- Reveal-on-scroll ------------------------------------------------------- */
[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity 0.7s cubic-bezier(.16,1,.3,1), transform 0.7s cubic-bezier(.16,1,.3,1); }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { [data-reveal] { opacity: 1; transform: none; } }

/* ---- Mobile nav --------------------------------------------------------------- */
.nav__toggle { display: inline-flex; background: none; border: none; padding: 8px; flex-shrink: 0; }
@media (min-width: 1024px) { .nav__toggle { display: none; } }
.nav__mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: var(--surface-card);
  border-radius: 24px;
  margin-top: 8px;
  padding: 12px;
}
.nav__mobile.is-open { display: flex; }
.nav__mobile a { padding: 12px 14px; text-decoration: none; border-radius: 12px; color: var(--color-slate); font-weight: 500; }
.nav__mobile a:hover { background: var(--surface-mist); color: var(--color-carbon-black); }
.nav__mobile-lang { display: flex; gap: 8px; padding: 8px 14px 4px; }
.nav__mobile-lang button {
  flex: 1;
  border: 1.5px solid var(--color-ash);
  background: transparent;
  border-radius: var(--radius-tags);
  padding: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-slate);
}
.nav__mobile-lang button[aria-pressed="true"] { background: var(--color-carbon-black); border-color: var(--color-carbon-black); color: var(--color-paper-white); }
@media (min-width: 560px) { .nav__mobile-lang { display: none; } }
@media (min-width: 1024px) { .nav__mobile { display: none !important; } }