/* =========================================================
   вернём·часы — дизайн-система
   Цвета, типографика, dot-grid, кнопки, карточки, анимации
   ========================================================= */

:root {
  /* ——— LIGHT (день): прохладная нейтральная палитра ——— */
  --paper: #EEF1F6;
  --ink: #15171C;
  --muted: #5E6573;
  --accent: #2540E8;
  --accent-soft: rgba(37, 64, 232, 0.10);
  --accent-softer: rgba(37, 64, 232, 0.055);
  --line: #DEE2EA;
  --card: #FFFFFF;

  /* фоновые эффекты */
  --bg-glow: rgba(37, 64, 232, 0.06);
  --dot-1: rgba(37, 64, 232, 0.11);
  --dot-2: rgba(21, 23, 28, 0.10);
  --grain-blend: multiply;
  --grain-opacity: 0.04;
  --placeholder-stripe: rgba(21, 23, 28, 0.05);

  /* тёмные «band»-секции (футер, CTA, фичовый тариф) */
  --band-bg: #15171C;
  --band-fg: #EDEFF4;
  --band-muted: rgba(237, 239, 244, 0.66);
  --band-line: rgba(237, 239, 244, 0.14);

  --r-btn: 12px;
  --r-card: 18px;
  --r-pill: 999px;

  --shadow-card: 0 30px 60px -30px rgba(21, 23, 28, 0.22);
  --shadow-soft: 0 16px 40px -28px rgba(21, 23, 28, 0.30);
  --shadow-hover: 0 40px 80px -34px rgba(21, 23, 28, 0.32);

  --maxw: 1180px;
  --gut: clamp(20px, 5vw, 64px);

  --ff-display: "Unbounded", system-ui, sans-serif;
  --ff-text: "Onest", system-ui, sans-serif;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

[data-theme="dark"] {
  /* ——— DARK (ночь): глубокий прохладный графит ——— */
  --paper: #0E1015;
  --ink: #EBEDF2;
  --muted: #969CA8;
  --accent: #6E84FF;
  --accent-soft: rgba(110, 132, 255, 0.16);
  --accent-softer: rgba(110, 132, 255, 0.09);
  --line: rgba(255, 255, 255, 0.11);
  --card: #171A21;

  --bg-glow: rgba(110, 132, 255, 0.12);
  --dot-1: rgba(110, 132, 255, 0.16);
  --dot-2: rgba(255, 255, 255, 0.05);
  --grain-blend: overlay;
  --grain-opacity: 0.05;
  --placeholder-stripe: rgba(255, 255, 255, 0.05);

  --band-bg: #171A21;
  --band-fg: #EBEDF2;
  --band-muted: rgba(235, 237, 242, 0.62);
  --band-line: rgba(235, 237, 242, 0.12);

  --shadow-card: 0 30px 60px -30px rgba(0, 0, 0, 0.62);
  --shadow-soft: 0 16px 40px -28px rgba(0, 0, 0, 0.55);
  --shadow-hover: 0 40px 80px -34px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: hidden; overflow-x: clip; }

body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    radial-gradient(105% 78% at 92% -12%, var(--bg-glow), transparent 50%);
  background-attachment: fixed;
  transition: background-color .4s var(--ease), color .4s var(--ease);
  color: var(--ink);
  font-family: var(--ff-text);
  font-size: 17px;
  line-height: 1.6;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  overflow-x: clip;
}

/* layered dot grid — denser toward the top-right, softly present elsewhere */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    radial-gradient(circle at center, var(--dot-1) 1.3px, transparent 1.6px),
    radial-gradient(circle at center, var(--dot-2) 1px, transparent 1.2px);
  background-size: 66px 66px, 22px 22px;
  background-position: 0 0, 0 0;
  opacity: 0.8;
  -webkit-mask-image: radial-gradient(130% 115% at 88% 2%, #000 0%, rgba(0,0,0,0.4) 46%, transparent 76%);
          mask-image: radial-gradient(130% 115% at 88% 2%, #000 0%, rgba(0,0,0,0.4) 46%, transparent 76%);
  pointer-events: none;
}

/* fine grain texture */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 160px 160px;
  opacity: var(--grain-opacity);
  mix-blend-mode: var(--grain-blend);
  pointer-events: none;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

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

/* ---------- Layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.section { padding-block: clamp(56px, 9vw, 120px); }
.section--tight { padding-block: clamp(40px, 6vw, 80px); }

.stack > * + * { margin-top: 1.1em; }

/* ---------- Typography ---------- */
.display {
  font-family: var(--ff-display);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0;
}
h1.display { font-size: clamp(38px, 7.2vw, 84px); }
h2.display { font-size: clamp(30px, 4.6vw, 56px); }
h3.display { font-size: clamp(22px, 2.8vw, 32px); font-weight: 600; }

.lead {
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.55;
  color: var(--muted);
  max-width: 56ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--ff-text);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 7px 14px;
  border-radius: var(--r-pill);
  line-height: 1;
}
.eyebrow::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.section-head { max-width: 60ch; }
.section-head h2 { margin: 18px 0 0; }
.section-head .lead { margin-top: 16px; }

.muted { color: var(--muted); }
.accent { color: var(--accent); }
.metric {
  font-family: var(--ff-display);
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--ff-text);
  font-weight: 600;
  font-size: 16px;
  line-height: 1;
  padding: 16px 24px;
  border-radius: var(--r-btn);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .25s var(--ease), background-color .25s var(--ease),
              color .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
  white-space: nowrap;
  text-align: center;
}
.btn svg { width: 18px; height: 18px; }

.btn--primary {
  background: var(--ink);
  color: var(--paper);
}
.btn--primary:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 18px 34px -16px rgba(37, 64, 232, 0.55);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn--ghost:hover {
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-3px);
}

.btn--accent {
  background: var(--accent);
  color: #fff;
}
.btn--accent:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 34px -16px rgba(37, 64, 232, 0.55);
}

.btn--block { width: 100%; }
.btn--lg { padding: 19px 30px; font-size: 17px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- Chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  padding: 9px 15px;
  border-radius: var(--r-pill);
}
.chip svg { width: 15px; height: 15px; color: var(--accent); }

/* ---------- Cards ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: clamp(22px, 3vw, 34px);
  box-shadow: var(--shadow-card);
}
.card--flat { box-shadow: var(--shadow-soft); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background-color .3s var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  height: 74px;
}

/* Logo */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: var(--ff-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.logo__mark {
  position: relative;
  width: 34px; height: 34px;
  flex: none;
  border-radius: 10px;
  background: var(--ink);
  display: grid;
  place-items: center;
  transition: transform .4s var(--ease), background-color .3s var(--ease);
}
.logo:hover .logo__mark { background: var(--accent); transform: rotate(-8deg); }
.logo__mark svg { width: 20px; height: 20px; color: var(--paper); }
.logo__dot { color: var(--accent); }
.logo__sub { color: var(--ink); }

/* Nav */
.nav { display: flex; align-items: center; gap: 2px; }
.nav a {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  padding: 9px 12px;
  border-radius: 9px;
  white-space: nowrap;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}
.nav a:hover { color: var(--ink); background: var(--accent-softer); }
.nav a.is-active { color: var(--ink); }
.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

.header-cta { display: flex; align-items: center; gap: 12px; }
.header-cta .btn { padding: 12px 20px; font-size: 15px; }

/* Theme toggle */
.theme-toggle {
  width: 46px; height: 46px;
  flex: none;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 11px;
  cursor: pointer;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  transition: background-color .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease), transform .25s var(--ease);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
.theme-toggle svg { width: 20px; height: 20px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* smooth theme transition for surfaces */
.card, .step, .svc, .price, .tl-body, .tl-num, .acc-item, .chip, .proof, .case,
.teaser, .form-card, .contact-item__ico, .integrations .pill, .field input,
.field textarea, .site-header, .shot, .portrait, .dl-cta, .endpoint-note {
  transition: background-color .4s var(--ease), border-color .4s var(--ease), color .4s var(--ease), box-shadow .3s var(--ease);
}

/* Burger */
.burger {
  display: none;
  width: 46px; height: 46px;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 11px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}
.burger span {
  display: block;
  position: relative;
  width: 20px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.burger span::before, .burger span::after {
  content: "";
  position: absolute;
  left: 0; width: 20px; height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .3s var(--ease);
}
.burger span::before { top: -6px; }
.burger span::after { top: 6px; }
body.menu-open .burger span { background: transparent; }
body.menu-open .burger span::before { transform: translateY(6px) rotate(45deg); }
body.menu-open .burger span::after { transform: translateY(-6px) rotate(-45deg); }

/* Mobile menu sheet */
.mobile-menu {
  position: fixed;
  inset: 74px 0 0 0;
  z-index: 99;
  background: var(--paper);
  padding: 22px var(--gut) 40px;
  transform: translateY(-12px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
  overflow-y: auto;
}
body.menu-open .mobile-menu { opacity: 1; transform: translateY(0); visibility: visible; }
.mobile-menu nav { display: flex; flex-direction: column; }
.mobile-menu nav a {
  font-family: var(--ff-display);
  font-weight: 600;
  font-size: 26px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mobile-menu nav a.is-active { color: var(--accent); }
.mobile-menu .btn { margin-top: 26px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--band-bg);
  color: var(--band-fg);
  border-top: 1px solid var(--line);
  margin-top: clamp(40px, 6vw, 80px);
}
.site-footer a { color: var(--band-fg); }
.footer-inner {
  display: grid;
  grid-template-columns: 1.25fr 0.85fr 0.95fr 0.95fr;
  gap: 40px;
  padding-block: clamp(48px, 6vw, 72px);
}
.footer-brand .logo { color: var(--band-fg); }
.footer-brand .logo__mark { background: var(--band-fg); }
.footer-brand .logo__mark svg { color: var(--band-bg); }
.footer-brand .logo:hover .logo__mark { background: var(--accent); }
.footer-brand .logo:hover .logo__mark svg { color: #fff; }
.footer-brand p { color: var(--band-muted); max-width: 34ch; margin-top: 16px; font-size: 15px; }
.footer-col h4 {
  font-family: var(--ff-text);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--band-muted);
  margin: 0 0 16px;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 11px; }
.footer-col a { color: var(--band-fg); opacity: 0.82; font-size: 15px; transition: opacity .2s var(--ease); }
.footer-col a:hover { opacity: 1; }
.footer-col a.tg-link { display: inline-flex; align-items: center; gap: 8px; }
.footer-col a.tg-link svg { width: 16px; height: 16px; }
/* full requisites block in footer */
.footer-req {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-block: 22px;
  border-top: 1px solid var(--band-line);
}
.footer-req__label {
  font-family: var(--ff-text);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--band-fg);
  opacity: 0.5;
  flex: none;
  padding-top: 1px;
}
.footer-req__row {
  flex: 1 1 360px;
  min-width: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--band-muted);
}
.footer-req__row > span { white-space: normal; }
.footer-req__sep { opacity: 0.4; margin: 0 6px; }

.footer-bar {
  border-top: 1px solid var(--band-line);
  padding-block: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  align-items: center;
  justify-content: space-between;
  font-size: 13.5px;
  color: var(--band-muted);
}
.footer-bar .req { max-width: 60ch; }

@media (max-width: 560px) {
  .footer-req { flex-direction: column; gap: 8px; }
}

/* ---------- Scroll-reveal & load animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  will-change: opacity, transform;
}
.reveal.is-in { animation: fadeUp .7s var(--ease) forwards; }

/* staggered children */
[data-stagger] > * {
  opacity: 0;
  transform: translateY(16px);
}
[data-stagger].is-in > * {
  animation: fadeUp .7s var(--ease) forwards;
}

@keyframes fadeUp {
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal, [data-stagger] > * { opacity: 1 !important; transform: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- Utility ---------- */
.grid { display: grid; gap: clamp(16px, 2vw, 24px); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.text-center { text-align: center; }
.mx-auto { margin-inline: auto; }
.divider { height: 1px; background: var(--line); border: 0; margin: 0; }

/* page hero spacing */
.page-hero { padding-top: clamp(48px, 7vw, 88px); padding-bottom: clamp(28px, 4vw, 48px); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 1000px) {
  .nav { display: none; }
  .header-cta .btn { display: none; }
  .burger { display: inline-flex; }
}
@media (max-width: 860px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .btn-row .btn { width: 100%; }
}