/* Лендинг Datalogia.AI — вёрстка по макету «Лендинг Datalogia.dc.html» (Claude Design).
   Токены — css/colors.css, css/spacing.css (копия tokens/ дизайн-системы).
   Десктоп ≥ 900px, мобильная версия < 900px. */

:root { --font-sans: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif; }

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font-sans); color: var(--dl-navy); background: var(--dl-white); -webkit-text-size-adjust: 100%; }
a { color: var(--dl-green); text-decoration: none; }
a:hover { color: var(--dl-green-600); text-decoration: underline; }
input, textarea, button { font-family: inherit; }
img { display: block; }
.icon { display: block; flex: none; }

.container { max-width: calc(1200px + 2 * var(--gutter)); margin: 0 auto; padding: 0 var(--gutter); }
.accent { color: var(--dl-green); }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: 0.1em; color: var(--dl-green); }
.h2 { margin: 0; font-size: 36px; line-height: 1.2; font-weight: 700; letter-spacing: -0.01em; text-wrap: balance; }
.section-head { display: flex; flex-direction: column; gap: 14px; }
section[id] { scroll-margin-top: 80px; }

/* Кнопки */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; border-radius: var(--radius-md); font-weight: 600; cursor: pointer; }
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--dl-green); color: var(--dl-white); border: none; }
.btn-primary:hover { background: var(--dl-green-600); color: var(--dl-white); }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; background: var(--dl-green); }
.btn-outline { border: 1.5px solid var(--dl-green); color: var(--dl-green); }
.btn-outline:hover { background: var(--dl-green-050); color: var(--dl-green); }
.btn:focus-visible, .field input:focus-visible, .field textarea:focus-visible, .consent input:focus-visible + .box { outline: 2px solid var(--focus-ring); outline-offset: 2px; }

/* Хедер */
.site-header { position: sticky; top: 0; z-index: 5; background: var(--dl-white); border-bottom: 1px solid var(--border); }
.site-header .container { padding-top: 16px; padding-bottom: 16px; display: flex; align-items: center; gap: 40px; }
.site-header .logo { height: 44px; width: auto; }
.site-nav { flex: 1; display: flex; justify-content: center; gap: 36px; }
.site-nav a { font-size: 15px; font-weight: 500; color: var(--dl-navy); }
.site-nav a:hover { color: var(--dl-green); text-decoration: none; }
.site-header .btn { padding: 10px 18px; font-size: 14px; white-space: nowrap; }

/* Первый экран */
.hero { padding: 80px 0 88px; overflow: hidden; background: linear-gradient(160deg, var(--dl-green-050) 0%, var(--dl-white) 75%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 40px; align-items: center; }
.hero .inner { display: flex; flex-direction: column; align-items: flex-start; gap: 24px; }
.hero h1 { margin: 0; font-size: 46px; line-height: 1.12; font-weight: 700; letter-spacing: -0.015em; text-wrap: balance; }
.hero p { margin: 0; font-size: 17px; line-height: 1.55; color: var(--fg-2); text-wrap: pretty; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; }
.hero-actions .btn-primary { padding: 15px 24px; font-size: 16px; }
.hero-actions .btn-outline { padding: 13.5px 20px; font-size: 16px; }
.hero-media img { width: 125%; max-width: none; height: auto; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
.chip { padding: 6px 14px; border: 1px solid var(--border-strong); border-radius: var(--radius-xs); background: var(--dl-white); font-size: 14px; font-weight: 500; }

/* Назначение */
.purpose { background: var(--bg-subtle); padding: 96px 0; }
.purpose .inner { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 24px; }
.purpose p { margin: 0; font-size: 17px; line-height: 1.65; color: var(--fg-2); text-wrap: pretty; }

/* Возможности */
.capabilities { padding: 104px 0; }
.capabilities .container, .architecture .container { display: flex; flex-direction: column; gap: 48px; }
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.card { background: var(--surface-card-muted); border-radius: var(--radius-md); padding: 36px; display: flex; flex-direction: column; gap: 16px; }
.card .icon { width: 32px; height: 32px; color: var(--dl-green); }
.card h3 { margin: 0; font-size: 22px; line-height: 1.25; font-weight: 600; }
.card p { margin: 0; font-size: 16px; line-height: 1.6; color: var(--fg-2); }

/* Секции с иллюстрацией: ИИ-помощник, дашборды, «Как это работает» */
.ai, .how { background: var(--bg-subtle); }
.ai, .dash, .how, .scenarios { padding: 104px 0; }
.ai .container, .scenarios .container { display: flex; flex-direction: column; gap: 48px; }
.media-split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 64px; align-items: center; }
.media-split.wide-first { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.dash .media-split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.media img { width: 100%; height: auto; }
.ai .media img { max-width: 400px; margin: 0 auto; }
.media-body { display: flex; flex-direction: column; gap: 28px; }
.lead-text { margin: 0; font-size: 17px; line-height: 1.6; color: var(--fg-2); text-wrap: pretty; }
.features { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 20px; }
.features li { display: flex; gap: 16px; align-items: flex-start; }
.features .icon { width: 24px; height: 24px; color: var(--dl-green); }
.features .num { flex: none; width: 28px; font-size: 15px; font-weight: 700; line-height: 1.45; color: var(--dl-green); }
.features h3 { margin: 0; font-size: 17px; line-height: 1.35; font-weight: 600; }
.features p { margin: 4px 0 0; font-size: 15px; line-height: 1.55; color: var(--fg-2); }
.trust { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.trust-card { display: flex; gap: 14px; align-items: flex-start; padding: 24px; background: var(--dl-white); border: 1px solid var(--dl-green-300); border-radius: var(--radius-md); }
.trust-card .icon { width: 24px; height: 24px; color: var(--dl-green); }
.trust-card h3 { margin: 0; font-size: 16px; line-height: 1.35; font-weight: 600; }
.trust-card p { margin: 4px 0 0; font-size: 14px; line-height: 1.5; color: var(--fg-2); }

/* Сценарии использования */
.scenario-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.card.scenario { padding: 28px; }
.scenario h3 { font-size: 19px; }
.scenario dl { margin: 0; display: flex; flex-direction: column; gap: 6px; }
.scenario dt { font-size: 12px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); }
.scenario dd { margin: 0; font-size: 15px; line-height: 1.55; color: var(--fg-2); }
.scenario dd + dt { margin-top: 10px; color: var(--dl-green); }

/* Архитектура */
.architecture { background: var(--dl-navy); color: var(--dl-white); padding: 104px 0; }
.architecture .eyebrow, .architecture .accent { color: var(--dl-green-glow); }
.pipe { display: flex; align-items: stretch; margin: 0; padding: 0; list-style: none; }
.pipe-step { flex: 1 1 0; min-width: 0; min-height: 112px; padding: 18px 16px; border-radius: var(--radius-md); background: var(--bg-dark-raised); border: 1px solid var(--border-dark); display: flex; flex-direction: column; justify-content: center; gap: 6px; font-size: 15px; font-weight: 600; line-height: 1.3; }
.pipe-step b { font-weight: 700; }
.pipe-step.is-accent { background: var(--dl-green); border-color: var(--dl-green); }
.pipe-arrow { flex: none; width: 32px; display: grid; place-items: center; color: var(--dl-green-glow); }
.pipe-arrow .icon { width: 18px; height: 18px; }
.pipe-arrow .down { display: none; }
.arch-notes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; padding-top: 32px; border-top: 1px solid var(--border-dark); }
.arch-notes p { margin: 0; font-size: 15px; line-height: 1.65; color: var(--dl-slate-300); }

/* Развёртывание и заявка — общая сетка 5/7 */
.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 48px; align-items: start; }
.deploy { padding: 104px 0; }
.checklist { margin: 0; padding: 0; list-style: none; }
.checklist li { display: flex; gap: 16px; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--border); font-size: 17px; line-height: 1.4; font-weight: 500; }
.compat { grid-column: 2; display: flex; flex-direction: column; gap: 16px; }
.compat h3 { margin: 0; font-size: 17px; line-height: 1.35; font-weight: 600; }
.compat-row { display: flex; flex-direction: column; gap: 8px; }
.compat-label { font-size: 13px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-3); }
.compat .chips { justify-content: flex-start; margin-top: 0; }
.tick { flex: none; width: 24px; height: 24px; border-radius: 50%; background: var(--dl-green); display: grid; place-items: center; }

.demo { background: var(--dl-green-050); padding: 104px 0; }
.demo .lead { display: flex; flex-direction: column; gap: 18px; }
.demo .lead p { margin: 0; font-size: 18px; line-height: 1.5; font-weight: 600; }
.form-card { background: var(--dl-white); border-radius: var(--radius-md); padding: 40px; border: 1px solid var(--border); }
.lead-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.lead-form .wide { grid-column: 1 / 3; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field span { font-size: 14px; font-weight: 600; }
.field input, .field textarea { font-size: 15px; color: var(--dl-navy); padding: 12px 14px; border: 1.5px solid var(--border); border-radius: var(--radius-md); outline: none; background: var(--dl-white); width: 100%; }
.field textarea { resize: vertical; }
.field input:focus, .field textarea:focus { border-color: var(--dl-green); }
.consent { display: flex; gap: 12px; align-items: flex-start; cursor: pointer; font-size: 14px; line-height: 1.45; color: var(--fg-2); }
.consent input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.consent .box { flex: none; width: 18px; height: 18px; margin-top: 1px; border-radius: var(--radius-sm); border: 1.5px solid var(--border-strong); background: var(--dl-white); display: grid; place-items: center; }
.consent .box svg { visibility: hidden; }
.consent input:checked + .box { background: var(--dl-green); border-color: var(--dl-green); }
.consent input:checked + .box svg { visibility: visible; }
.lead-form button { justify-self: start; padding: 15px 28px; font-size: 16px; }
.form-error { margin: 0; padding: 12px 14px; border-radius: var(--radius-md); background: var(--dl-red-050); color: var(--dl-red); font-size: 14px; line-height: 1.45; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.sent { display: flex; flex-direction: column; gap: 12px; }
.sent .tick { width: 40px; height: 40px; }
.sent strong { font-size: 22px; font-weight: 600; }
.sent a { font-size: 15px; font-weight: 500; }
[hidden] { display: none !important; }

/* Футер */
.site-footer { background: var(--dl-navy); color: var(--dl-white); }
.site-footer .container { padding-top: 56px; padding-bottom: 32px; display: flex; flex-direction: column; gap: 32px; }
.site-footer a { color: var(--dl-white); }
.footer-top { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; }
.footer-brand { display: flex; flex-direction: column; gap: 12px; }
.footer-brand .logo { height: 40px; width: auto; align-self: flex-start; }
.muted { font-size: 14px; color: var(--dl-slate-300); }
.footer-links { display: flex; gap: 28px; font-size: 14px; }
.footer-contacts { display: flex; flex-direction: column; gap: 6px; font-size: 14px; line-height: 1.5; }
.footer-contacts strong { font-weight: 600; }
.footer-contacts div { display: flex; flex-wrap: wrap; gap: 6px 28px; color: var(--dl-slate-300); }
.footer-bottom { display: flex; justify-content: space-between; gap: 40px; padding-top: 24px; border-top: 1px solid var(--border-dark); font-size: 13px; color: var(--dl-slate-300); }

/* Схема архитектуры не помещается в строку раньше, чем включается мобильная версия */
@media (max-width: 1100px) {
  .pipe { flex-direction: column; }
  .pipe-step { min-height: 0; padding: 14px 16px; gap: 4px; }
  .pipe-arrow { width: auto; height: 28px; }
  .pipe-arrow .right { display: none; }
  .pipe-arrow .down { display: block; }
  .scenario-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .media-split, .media-split.wide-first, .dash .media-split { gap: 40px; }
}

/* Мобильная версия (макет 390px) */
@media (max-width: 899px) {
  :root { --gutter: 20px; }
  .eyebrow { font-size: 12px; letter-spacing: 0.08em; }
  .h2 { font-size: 26px; letter-spacing: 0; }
  .section-head { gap: 10px; }
  section[id] { scroll-margin-top: 104px; }

  .site-header .container { flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-top: 12px; padding-bottom: 0; }
  .site-header .logo { height: 32px; }
  .site-header .btn { padding: 9px 14px; }
  .site-nav { order: 3; flex: 1 0 100%; justify-content: flex-start; gap: 24px; margin: 0 calc(-1 * var(--gutter)); padding: 12px var(--gutter); border-top: 1px solid var(--border); }
  .site-nav { overflow-x: auto; scrollbar-width: none; }
  .site-nav::-webkit-scrollbar { display: none; }
  .site-nav a { flex: none; font-size: 14px; }

  .hero { padding: 48px 0 40px; }
  .hero-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero .inner { gap: 20px; }
  .hero-media img { width: 100%; }
  .hero h1 { font-size: 30px; line-height: 1.15; letter-spacing: -0.01em; }
  .hero p { font-size: 16px; }
  .hero-actions { flex-direction: column; align-self: stretch; gap: 10px; }
  .hero-actions .btn-primary { padding: 15px 20px; }
  .hero-actions .btn-outline { padding: 13.5px 16px; font-size: 15px; line-height: 1.3; gap: 8px; }
  .chips { margin-top: 8px; }
  .chip { padding: 6px 12px; font-size: 13px; }

  .purpose { padding: 56px 0; }
  .purpose .inner { align-items: stretch; text-align: left; gap: 16px; }
  .purpose p { font-size: 16px; line-height: 1.6; }

  .capabilities, .architecture, .deploy, .demo { padding: 56px 0; }
  .capabilities .container, .architecture .container { gap: 28px; }
  .cards { grid-template-columns: 1fr; gap: 28px; }
  .card { padding: 24px; gap: 12px; }
  .card .icon { width: 28px; height: 28px; }
  .card h3 { font-size: 19px; }
  .card p { font-size: 15px; line-height: 1.55; }

  .ai, .dash, .how, .scenarios { padding: 56px 0; }
  .ai .container, .scenarios .container { gap: 28px; }
  .media-split, .media-split.wide-first, .dash .media-split { grid-template-columns: 1fr; gap: 28px; }
  .dash .media { order: -1; }
  .ai .media img { max-width: 260px; }
  .media-body { gap: 20px; }
  .lead-text { font-size: 16px; }
  .features { gap: 16px; }
  .features li { gap: 14px; }
  .features h3 { font-size: 16px; }
  .features p { font-size: 14px; }
  .trust { grid-template-columns: 1fr; gap: 12px; }
  .trust-card { padding: 18px; }
  .scenario-grid { grid-template-columns: 1fr; gap: 16px; }
  .card.scenario { padding: 24px; }
  .scenario h3 { font-size: 18px; }
  .compat { grid-column: auto; margin-top: 12px; }

  .arch-notes { grid-template-columns: 1fr; gap: 16px; padding-top: 20px; }
  .arch-notes p { font-size: 14px; line-height: 1.6; }

  .split { grid-template-columns: 1fr; gap: 16px; }
  .demo .split { gap: 24px; }
  .checklist li { gap: 14px; padding: 14px 0; font-size: 16px; }
  .checklist .tick { width: 22px; height: 22px; }
  .demo .lead { gap: 12px; }
  .demo .lead p { font-size: 16px; }
  .form-card { padding: 24px; }
  .lead-form { grid-template-columns: 1fr; gap: 16px; }
  .lead-form .wide { grid-column: auto; }
  .field input, .field textarea { font-size: 16px; }
  .consent { min-height: 44px; }
  .consent .box { width: 20px; height: 20px; }
  .lead-form button { justify-self: stretch; padding: 15px 20px; }
  .sent strong { font-size: 20px; }

  .site-footer .container { padding-top: 40px; padding-bottom: 28px; gap: 24px; }
  .footer-top { flex-direction: column; align-items: stretch; gap: 24px; }
  .footer-brand { gap: 10px; }
  .footer-brand .logo { height: 32px; }
  .footer-links { flex-direction: column; gap: 10px; }
  .footer-contacts div { flex-direction: column; gap: 6px; }
  .footer-bottom { flex-direction: column; gap: 8px; padding-top: 20px; line-height: 1.5; }
}