/* TenderAI — дизайн-система.
   Сдержанная палитра, крупная типографика, много воздуха, мягкие карточки. */

:root {
  --ink: #1d1d1f;
  --ink-soft: #424245;
  --muted: #5f6368;
  --line: rgba(0, 0, 0, 0.08);
  --line-strong: rgba(0, 0, 0, 0.14);
  --bg: #ffffff;
  --bg-alt: #f5f5f7;
  --card: #ffffff;
  --brand: #0071e3;
  --brand-ink: #ffffff;
  --green: #1d8a4a;
  --radius-lg: 24px;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
  --shadow-soft: 0 2px 12px rgba(0, 0, 0, 0.05);
  --max: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.47;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

h1, h2, h3, h4 { letter-spacing: -0.022em; line-height: 1.1; margin: 0; font-weight: 600; }
h1 { font-size: clamp(34px, 5.4vw, 60px); letter-spacing: -0.03em; }
h2 { font-size: clamp(26px, 3.6vw, 42px); letter-spacing: -0.025em; }
h3 { font-size: 21px; }
p { margin: 0; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ---------- шапка ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 24px;
  height: 56px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover { text-decoration: none; }

.nav-links { display: flex; gap: 26px; }
.nav-links a { color: var(--ink-soft); font-size: 14px; text-decoration: none; }
.nav-links a:hover { color: var(--ink); }

.topbar-right { display: flex; align-items: center; gap: 14px; }
.who { color: var(--muted); font-size: 14px; }

/* ---------- кнопки ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 16px;
  font-weight: 500;
  border-radius: 980px;
  border: 0;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, transform 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--brand); color: var(--brand-ink); }
.btn-primary:hover { background: #0077ed; text-decoration: none; }
.btn-secondary { background: rgba(0, 113, 227, 0.08); color: var(--brand); }
.btn-secondary:hover { background: rgba(0, 113, 227, 0.14); text-decoration: none; }
.btn-plain { background: transparent; color: var(--ink); padding: 12px 4px; }
.btn-small { padding: 7px 15px; font-size: 14px; }

.link-btn {
  background: none;
  border: 0;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  padding: 4px;
}
.link-btn:hover { color: var(--ink); }

/* ---------- разметка ---------- */
.wrap { flex: 1; width: 100%; max-width: var(--max); margin: 0 auto; padding: 56px 24px 72px; }
.wrap-wide { max-width: 1200px; }
.section { padding: 96px 0; }
.section-alt { background: var(--bg-alt); }
.section > .inner { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 14px;
}
.lead { color: var(--muted); font-size: clamp(18px, 2.1vw, 21px); line-height: 1.5; max-width: 660px; }
.hero .lead, .cta .lead { max-width: 620px; }
.muted { color: var(--muted); }
.center { text-align: center; }

/* ---------- герой ---------- */
.hero { padding: 92px 24px 24px; text-align: center; }
.hero .lead { max-width: 640px; margin: 18px auto 0; }
.hero-form {
  display: flex;
  gap: 10px;
  max-width: 480px;
  margin: 32px auto 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.hero-form input[type="email"] {
  flex: 1 1 240px;
  padding: 14px 18px;
  font-size: 16px;
  border-radius: 980px;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--ink);
  font-family: inherit;
}
.hero-form input[type="email"]:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.15);
}
.fineprint { color: var(--muted); font-size: 13px; }

/* ---------- мокап продукта ---------- */
.mock {
  margin: 56px auto 0;
  max-width: 940px;
  border-radius: 28px;
  background: linear-gradient(160deg, #eef3ff 0%, #f7f8fb 45%, #eef0f4 100%);
  padding: 28px 28px 0;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.mock-window {
  background: #fff;
  border-radius: 18px 18px 0 0;
  border: 1px solid var(--line);
  border-bottom: 0;
  box-shadow: 0 -1px 0 rgba(255, 255, 255, 0.6) inset;
  padding: 18px 20px 0;
}
.mock-bar { display: flex; gap: 7px; margin-bottom: 16px; }
.mock-dot { width: 10px; height: 10px; border-radius: 50%; background: #e3e5ea; }
.mock-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
  font-size: 14px;
}
.mock-row:first-of-type { border-top: 0; }
.mock-row b { font-weight: 600; }
.mock-tag {
  font-size: 11px;
  color: var(--brand);
  background: rgba(0, 113, 227, 0.1);
  border-radius: 999px;
  padding: 2px 9px;
  white-space: nowrap;
}
.mock-price { color: var(--muted); font-variant-numeric: tabular-nums; }

/* ---------- сетки и карточки ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-soft);
}
.card-tall { padding: 32px; }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 15.5px; }

.feature { display: grid; gap: 14px; }
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(0, 113, 227, 0.1);
  color: var(--brand);
  font-size: 20px;
  font-weight: 600;
}

/* ---------- шаги ---------- */
.steps { display: grid; gap: 44px; }
.step-row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 24px;
  align-items: start;
}
.step-num {
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -0.04em;
  color: rgba(0, 0, 0, 0.12);
  line-height: 1;
}
.step-row h3 { margin-bottom: 6px; }
.step-row p { color: var(--muted); font-size: 16px; max-width: 640px; }

/* ---------- список источников ---------- */
.sources { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.source {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 15.5px;
}
.source-soon { color: var(--muted); background: #fafafc; }
.badge {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(29, 138, 74, 0.12);
  color: var(--green);
  font-weight: 500;
}
.badge-soft { background: rgba(0, 0, 0, 0.05); color: var(--muted); }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 0; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); padding: 20px 0; }
.faq summary {
  cursor: pointer;
  font-size: 17px;
  font-weight: 500;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--muted); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq p { color: var(--muted); margin-top: 10px; font-size: 15.5px; max-width: 720px; }

/* ---------- финальный CTA ---------- */
.cta {
  text-align: center;
  padding: 96px 24px;
  background: radial-gradient(120% 120% at 50% 0%, #eaf1ff 0%, #ffffff 60%);
}
.cta h2 { margin-bottom: 12px; }

/* ---------- подвал ---------- */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  padding: 48px 24px 32px;
  font-size: 13px;
  color: var(--muted);
}
.footer-inner { max-width: var(--max); margin: 0 auto; display: grid; gap: 28px; }
.footer-cols { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }
.footer h4 { font-size: 13px; color: var(--ink); margin-bottom: 10px; }
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.footer a { color: var(--muted); }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 20px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- внутренние страницы ---------- */
.page-title { margin-bottom: 8px; }
.page-lead { color: var(--muted); font-size: 17px; margin-bottom: 28px; max-width: 680px; }

.profile-form label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.profile-form textarea {
  width: 100%;
  padding: 16px 18px;
  font: inherit;
  font-size: 16px;
  line-height: 1.5;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  resize: vertical;
  background: #fff;
  color: var(--ink);
}
.profile-form textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.15);
}
.profile-form .row { margin-top: 14px; align-items: center; display: flex; gap: 14px; flex-wrap: wrap; }
.hint { color: var(--muted); font-size: 13px; margin: 12px 0 0; }
.hint.inline { margin: 0; }
.error { color: #b42318; margin: 0 0 16px; }

.parsed { margin-top: 34px; border-top: 1px solid var(--line); padding-top: 26px; }
.parsed h2 { font-size: 22px; margin-bottom: 12px; }
.summary { font-size: 17px; margin: 0 0 18px; }

.kv { display: grid; grid-template-columns: 180px 1fr; gap: 10px 16px; margin: 0; }
.kv dt { color: var(--muted); font-size: 14px; }
.kv dd { margin: 0; font-size: 15.5px; }

.questions {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid #ffe2b8;
  background: #fffaf0;
  border-radius: var(--radius-sm);
}
.questions h3 { margin: 0 0 8px; font-size: 15px; }
.questions ul { margin: 0; padding-left: 20px; }
.questions li { margin-bottom: 4px; }

.changes {
  margin-top: 24px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
}
.changes h3 { margin: 0 0 10px; font-size: 15px; }
.change { margin-bottom: 8px; font-size: 14px; }
.change-label { color: var(--muted); margin-right: 6px; }
.minus { color: #b42318; margin-right: 8px; }
.plus { color: var(--green); margin-right: 8px; }

.notice {
  background: rgba(0, 113, 227, 0.06);
  border: 1px solid rgba(0, 113, 227, 0.15);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 14px;
  margin-bottom: 20px;
}

.tender-list { display: grid; gap: 14px; }
.tender {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  background: #fff;
  box-shadow: var(--shadow-soft);
}
.tender h2 { font-size: 17px; margin: 0 0 6px; font-weight: 600; }
.tender h2 a { color: var(--ink); }
.tender h2 a:hover { color: var(--brand); text-decoration: none; }
.tender-meta { margin: 0 0 10px; color: var(--muted); font-size: 14px; }
.reasons { margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  background: rgba(0, 0, 0, 0.045);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
}

.devbox {
  margin: 20px 0;
  padding: 16px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm);
  background: #fbfcfe;
}
.devbox-title { margin: 0 0 8px; font-weight: 600; font-size: 14px; }

/* ---------- адаптив ---------- */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .sources { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nav-links { display: none; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { padding: 36px 18px 56px; }
  .hero { padding: 56px 18px 16px; }
  .section { padding: 64px 0; }
  .section > .inner { padding: 0 18px; }
  .card { padding: 22px; }
  .step-row { grid-template-columns: 1fr; gap: 8px; }
  .step-num { font-size: 34px; }
  .kv { grid-template-columns: 1fr; gap: 4px; }
  .kv dt { margin-top: 8px; }
  .mock { padding: 14px 14px 0; border-radius: 20px; }
  .mock-row { flex-direction: column; align-items: flex-start; gap: 6px; }
  .mock-tag { align-self: flex-start; }
  .footer-cols { grid-template-columns: 1fr; }
  .cta { padding: 64px 18px; }
}