/* ============================================================
   КонтентЗавод — landing styles
   Light B2B SaaS, blue accent, large typography
   ============================================================ */

:root {
  /* tweakable */
  --accent: #2563EB;
  --radius: 16px;

  /* derived accent tints (color-mix keeps them in sync with --accent) */
  --accent-strong: color-mix(in srgb, var(--accent) 82%, #000);
  --accent-ink:    color-mix(in srgb, var(--accent) 70%, #0b1220);
  --accent-tint:   color-mix(in srgb, var(--accent) 8%, #fff);
  --accent-tint-2: color-mix(in srgb, var(--accent) 14%, #fff);
  --accent-line:   color-mix(in srgb, var(--accent) 22%, #fff);

  /* neutrals */
  --ink:   #0B1220;
  --ink-2: #475569;
  --ink-3: #7E8AA0;
  --line:  #E6EAF2;
  --line-2:#EEF1F7;
  --bg:    #FFFFFF;
  --bg-soft: #F6F8FC;
  --bg-deep: #0B1220;

  /* semantic */
  --good: #15A36A;
  --good-tint: #EAF7F0;
  --warn: #B0411A;
  --warn-tint: #FBEDE7;

  --shadow-sm: 0 1px 2px rgba(13,22,40,.05), 0 2px 6px rgba(13,22,40,.04);
  --shadow-md: 0 10px 30px -12px rgba(13,22,40,.18), 0 2px 8px rgba(13,22,40,.05);
  --shadow-lg: 0 40px 80px -32px rgba(13,22,40,.30), 0 8px 24px -12px rgba(13,22,40,.12);
  --shadow-accent: 0 18px 40px -16px color-mix(in srgb, var(--accent) 55%, transparent);

  --maxw: 1200px;
  --gap: 24px;

  --ff-display: "Onest", system-ui, sans-serif;
  --ff-body: "Manrope", system-ui, sans-serif;
  --ff-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--ff-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 17px;
  line-height: 1.6;
  letter-spacing: -0.005em;
}

h1, h2, h3, h4 {
  font-family: var(--ff-display);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0; text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img, svg { display: block; }

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

.section { padding: 104px 0; position: relative; }
.section--soft { background: var(--bg-soft); }
.section--tint { background: var(--accent-tint); }
.section--deep { background: var(--bg-deep); color: #E7ECF6; }

.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--ff-body);
  font-weight: 700; font-size: 13px; letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--accent-ink);
  background: var(--accent-tint-2);
  border: 1px solid var(--accent-line);
  padding: 6px 13px; border-radius: 999px;
  margin-bottom: 22px;
  width: fit-content;
}
.section--deep .eyebrow { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.16); color: #cfe0ff; }

h1.display { font-size: clamp(40px, 5.2vw, 68px); }
h2.title   { font-size: clamp(32px, 3.8vw, 50px); }
h3.subhead { font-size: clamp(22px, 2.2vw, 28px); }

.lead { font-size: clamp(17px, 1.35vw, 21px); color: var(--ink-2); line-height: 1.62; }
.muted { color: var(--ink-2); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--ff-body); font-weight: 700; font-size: 16px;
  padding: 15px 24px; border-radius: 12px; border: 1px solid transparent;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: var(--shadow-accent); }
.btn-primary:hover { background: var(--accent-strong); transform: translateY(-1px); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); box-shadow: var(--shadow-sm); }
.btn-ghost:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); color: var(--accent-ink); transform: translateY(-1px); }
.section--deep .btn-ghost { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.18); color: #fff; }
.section--deep .btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-lg { padding: 18px 30px; font-size: 17px; }
.btn .arrow { transition: transform .2s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- generic card ---------- */
.card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
}

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(22px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1); }
.reveal.d1.in { transition-delay: .07s; }
.reveal.d2.in { transition-delay: .14s; }
.reveal.d3.in { transition-delay: .21s; }
.reveal.d4.in { transition-delay: .28s; }
.reveal.d5.in { transition-delay: .35s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- mono chip ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--ff-body); font-weight: 600; font-size: 14px;
  padding: 7px 12px; border-radius: 9px;
  background: var(--bg-soft); border: 1px solid var(--line); color: var(--ink-2);
}
.chip.kw { background: var(--accent-tint); border-color: var(--accent-line); color: var(--accent-ink); font-family: var(--ff-mono); font-size: 13px; }

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .section { padding: 72px 0; }
  .wrap { padding: 0 22px; }
  .section-head { margin-bottom: 40px; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .section { padding: 60px 0; }
  .btn { width: 100%; }
}