/* site.css — сайт-витрина AI Digital Service.
   Визуальный язык: неоновый фиолетовый (референс dot.ai/dex.ai) — берём ВИД,
   контент наш (MAS под SMB, спека раздел 3). «Мягкие карточки» на тёмном фоне.
   Шрифты Manrope (текст) + Space Grotesk (заголовки) через Google Fonts. */

:root {
  /* Неоновая фиолетовая палитра */
  --violet: #7c3aed;
  --violet-2: #8b5cf6;
  --violet-glow: rgba(124, 58, 237, 0.55);
  --blue-accent: #60a5fa;
  --bg-0: #0b0518;
  --bg-1: #1a0b2e;
  --bg-2: #2d1b4e;
  --card: #15102a;
  --card-line: rgba(139, 92, 246, 0.22);
  --ink: #f5f3ff;
  --muted: #b8add6;
  --muted-2: #7c719e;
  --card-radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  /* Фон «дышит» фиолетовым — многослойный радиальный + вертикальный градиент */
  background:
    radial-gradient(1100px 600px at 75% -5%, rgba(124,58,237,0.28), transparent 60%),
    radial-gradient(900px 500px at 10% 20%, rgba(96,165,250,0.12), transparent 55%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 45%, var(--bg-2) 100%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}
h1, h2, h3 { font-family: 'Space Grotesk', sans-serif; letter-spacing: -0.02em; }
.section { max-width: 1080px; margin: 0 auto; padding: 96px 24px; }
.section h2 { font-size: 32px; font-weight: 700; margin: 0 0 14px; text-align: center; }
.section .lead { text-align: center; color: var(--muted); max-width: 660px; margin: 0 auto 52px; font-size: 16px; }
.eyebrow {
  text-align: center; font-size: 13px; font-weight: 700; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--violet-2); margin-bottom: 14px;
}

/* Дуга-акцент под ключевым словом заголовка (как синяя кривая в референсе) */
.arc {
  position: relative; display: inline-block; white-space: nowrap;
}
.arc::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -8px; height: 10px;
  background: radial-gradient(60% 120% at 50% 0%, var(--blue-accent), transparent 72%);
  border-radius: 50%; opacity: 0.9;
}

/* ─── Hero ─── */
.hero { text-align: center; padding: 116px 24px 104px; position: relative; overflow: hidden; }
.hero .eyebrow { color: var(--violet-2); }
.hero h1 { font-size: 48px; font-weight: 700; margin: 0 0 20px; line-height: 1.1; }
.hero h1 .accent { color: var(--blue-accent); }
.hero p { color: var(--muted); max-width: 580px; margin: 0 auto 34px; font-size: 17px; }
.hero .micro { margin-top: 22px; font-size: 13px; color: var(--muted-2); }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
/* Hero-визуал — крупная полоса ВЫШЕ кнопок (между подзаголовком и .hero-actions).
   Без рамки, фон слит с hero: анимация «живёт» в герое, а не в коробке.
   <img hero.webp> — базовый fallback-слой; .hero-anim — оверлей с JS-анимацией поверх. */
.hero-visual {
  position: relative;
  width: min(960px, 92vw); height: clamp(360px, 38vw, 440px);
  margin: 36px auto 38px; overflow: hidden;
}
.hero-visual img {
  width: 100%; height: 100%; display: block;
  object-fit: cover; object-position: left top;
  transform: scale(1.15); transform-origin: left top;
}
/* Контейнер анимации перекрывает fallback-картинку, когда JS её запустил. */
.hero-anim {
  position: absolute; inset: 0; z-index: 2;
}
.hero-anim:empty { display: none; }   /* пусто (no-JS / reduced-motion) → виден hero.webp */
@media (max-width: 640px) {
  .hero-visual { height: clamp(220px, 56vw, 260px); margin: 28px auto 30px; }
}

/* ─── Кнопки ─── */
.btn {
  display: inline-block; border-radius: 12px; padding: 15px 30px;
  font-size: 16px; font-weight: 700; cursor: pointer; text-decoration: none;
  border: none; transition: transform .15s, box-shadow .15s, background .15s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--violet) 0%, var(--violet-2) 100%);
  color: #fff; box-shadow: 0 0 0 1px rgba(139,92,246,0.5), 0 10px 30px -8px var(--violet-glow);
}
.btn-primary:hover { box-shadow: 0 0 0 1px var(--violet-2), 0 14px 38px -8px var(--violet-glow); transform: translateY(-2px); }
.btn-outline {
  background: transparent; color: var(--ink);
  border: 1px solid var(--card-line); box-shadow: inset 0 0 0 0 transparent;
}
.btn-outline:hover { border-color: var(--violet-2); box-shadow: 0 0 18px -4px var(--violet-glow); }

/* ─── Карточки ─── */
.cards { display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); }
.cards.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cards.cases { grid-template-columns: repeat(2, 1fr); }
.card {
  background: var(--card); border-radius: var(--card-radius); padding: 28px 26px;
  border: 1px solid var(--card-line);
  box-shadow: 0 18px 44px -26px rgba(0,0,0,0.7);
}
.card h3 { font-size: 19px; font-weight: 700; margin: 0 0 10px; color: var(--ink); }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }
/* 3D-ассет ниши. overflow:hidden + зум кадрируют угловую иконку генератора за рамку. */
.card .asset {
  display: block; width: 100%; aspect-ratio: 1 / 1; margin-bottom: 16px;
  border-radius: 14px; overflow: hidden;
  box-shadow: 0 0 22px -6px var(--violet-glow), inset 0 0 0 1px var(--card-line);
}
.card .asset img {
  width: 100%; height: 100%; display: block;
  object-fit: contain; object-position: center;
}
.card .badge {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .04em;
  text-transform: uppercase; padding: 4px 10px; border-radius: 8px; margin-bottom: 12px;
}
.badge.prod { background: rgba(34,197,94,0.16); color: #4ade80; }
.badge.personal { background: rgba(139,92,246,0.18); color: var(--violet-2); }
.badge.rd { background: rgba(245,158,11,0.16); color: #fbbf24; }

/* ─── Шаги ─── */
.steps .card .num { font-family: 'Space Grotesk', sans-serif; font-size: 14px; font-weight: 700; color: var(--violet-2); margin-bottom: 8px; }

/* ─── Блок выгоды + подвал ─── */
.cta-block { text-align: center; padding: 96px 24px; position: relative; }
.cta-block h2 { font-size: 32px; margin: 0 0 14px; }
.cta-block p { color: var(--muted); max-width: 560px; margin: 0 auto 34px; }
.cta-block .figure { font-size: 44px; font-weight: 700; color: var(--blue-accent); margin: 0 0 8px; font-family: 'Space Grotesk', sans-serif; text-shadow: 0 0 28px rgba(96,165,250,0.5); }

.footer { text-align: center; padding: 44px 24px; font-size: 13px; color: var(--muted-2); border-top: 1px solid rgba(139,92,246,0.14); }
.footer a { color: var(--muted); text-decoration: none; }
.footer a:hover { color: var(--violet-2); }

/* ─── Форма (холодная заявка) ─── */
.form-wrap { max-width: 540px; margin: 0 auto; padding: 80px 24px; }
.form-card {
  background: var(--card); border-radius: var(--card-radius); padding: 36px 32px;
  border: 1px solid var(--card-line); box-shadow: 0 24px 60px -28px rgba(0,0,0,0.8);
}
.field { margin-bottom: 20px; }
.field label { display: block; font-size: 14.5px; font-weight: 600; margin-bottom: 8px; color: var(--ink); }
.field input, .field select {
  width: 100%; padding: 13px 15px; border: 1px solid var(--card-line);
  border-radius: 12px; font-size: 15px; font-family: inherit;
  background: rgba(11,5,24,0.6); color: var(--ink);
  outline: none; transition: border-color .15s, box-shadow .15s;
}
.field input::placeholder { color: var(--muted-2); }
.field input:focus, .field select:focus { border-color: var(--violet-2); box-shadow: 0 0 0 3px rgba(139,92,246,0.25); }
.field .hint { font-size: 12.5px; color: var(--muted-2); margin-top: 6px; }
.field select option { background: var(--bg-1); color: var(--ink); }
.niche-fields { display: none; }
.niche-fields[data-active="true"] { display: block; }
.form-msg { display: none; margin-top: 16px; padding: 14px; border-radius: 12px; font-size: 14px; }
.form-msg.err { display: block; background: rgba(244,63,94,0.16); color: #fb7185; }
.form-msg.ok { display: block; background: rgba(34,197,94,0.16); color: #4ade80; }

/* Модалка результата */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 100;
  background: rgba(11,5,24,0.7); align-items: center; justify-content: center; padding: 24px;
  -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px);
}
.modal-overlay[data-open="true"] { display: flex; }
.modal {
  background: var(--card); border-radius: var(--card-radius); padding: 36px 32px;
  max-width: 440px; width: 100%; text-align: center; position: relative;
  border: 1px solid var(--card-line);
  box-shadow: 0 0 60px -10px var(--violet-glow), 0 24px 60px -12px rgba(0,0,0,0.8);
}
.modal-close { position: absolute; top: 16px; right: 18px; background: none; border: none; cursor: pointer; font-size: 24px; color: var(--muted-2); }
.modal .modal-label { font-size: 15px; color: var(--muted); }
.modal .roi-amount { font-size: 40px; font-weight: 700; color: var(--blue-accent); margin: 12px 0 6px; font-family: 'Space Grotesk', sans-serif; text-shadow: 0 0 26px rgba(96,165,250,0.5); }
.modal .roi-note { font-size: 14px; color: var(--muted); margin: 0 0 8px; }

/* ─── Анимации (уровень 2) ─── */
.reveal.reveal-armed { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.reveal-armed.revealed { opacity: 1; transform: none; }

.card { transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.card:hover {
  transform: translateY(-4px);
  border-color: var(--violet-2);
  box-shadow: 0 0 26px -6px var(--violet-glow), 0 22px 48px -22px rgba(0,0,0,0.8);
}

@media (max-width: 860px) {
  .cards, .cards.cols-2 { grid-template-columns: 1fr; }
  .cards.cases { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 34px; }
  .section { padding: 64px 20px; }
}
@media (max-width: 640px) {
  .cards.cases { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; }
  .cards.cases > .card { flex: 0 0 85%; scroll-snap-align: start; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .card:hover { transform: none; }
  .reveal.reveal-armed { opacity: 1; transform: none; transition: none; }
}

/* ─── Чат-виджет ─── */
.chat-fab {
  position: fixed;
  right: 24px;
  bottom: 28px;
  z-index: 200;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--violet) 0%, var(--violet-2) 100%);
  color: #fff;
  box-shadow: 0 0 0 1px rgba(139,92,246,0.5), 0 8px 28px -6px var(--violet-glow);
  transition: transform .15s, box-shadow .15s;
}
.chat-fab:hover {
  transform: scale(1.08);
  box-shadow: 0 0 0 1px var(--violet-2), 0 12px 36px -6px var(--violet-glow);
}

.chat-panel {
  position: fixed;
  right: 24px;
  bottom: 96px;
  z-index: 201;
  width: 360px;
  max-height: 560px;
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--card-line);
  border-radius: var(--card-radius);
  box-shadow: 0 0 48px -8px var(--violet-glow), 0 24px 64px -16px rgba(0,0,0,0.85);
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px) scale(0.97);
  transform-origin: bottom right;
  transition: opacity .2s ease, transform .2s ease;
}
.chat-panel.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--card-line);
  flex-shrink: 0;
}
.chat-title {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
}
.chat-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--muted-2);
  font-size: 18px;
  line-height: 1;
  padding: 4px;
  transition: color .15s;
}
.chat-close:hover { color: var(--ink); }

/* Экран регистрации */
.chat-reg {
  padding: 20px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 0;
  flex: 1;
  overflow-y: auto;
}
.chat-reg-hint {
  margin: 0 0 14px;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.5;
}
.chat-field {
  margin-bottom: 12px;
}
.chat-inp {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--card-line);
  border-radius: 10px;
  font-size: 14.5px;
  font-family: inherit;
  background: rgba(11,5,24,0.6);
  color: var(--ink);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.chat-inp::placeholder { color: var(--muted-2); }
.chat-inp:focus { border-color: var(--violet-2); box-shadow: 0 0 0 3px rgba(139,92,246,0.22); }

.chat-reg-err {
  display: none;
  margin-bottom: 10px;
  padding: 10px 12px;
  border-radius: 9px;
  font-size: 13px;
  color: #fb7185;
  background: rgba(244,63,94,0.14);
}
.chat-reg-err.visible { display: block; }

.chat-reg-btn {
  width: 100%;
  margin-top: 4px;
  padding: 12px 20px;
  font-size: 15px;
}

/* Экран чата */
.chat-main {
  flex: 1;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.chat-log {
  flex: 1;
  overflow-y: auto;
  padding: 16px 14px 10px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scroll-behavior: smooth;
}

.chat-msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 14px;
  line-height: 1.5;
  word-break: break-word;
}
.chat-msg.user {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--violet) 0%, var(--violet-2) 100%);
  color: #fff;
  border-bottom-right-radius: 4px;
}
.chat-msg.bot {
  align-self: flex-start;
  background: var(--bg-1);
  color: var(--ink);
  border: 1px solid var(--card-line);
  border-bottom-left-radius: 4px;
}
/* Структура ответа бота: абзацы и списки читаются раздельно, не простынёй. */
.chat-msg.bot .chat-p { margin: 0 0 10px; }
.chat-msg.bot .chat-p:last-child { margin-bottom: 0; }
.chat-msg.bot .chat-list {
  margin: 0 0 10px;
  padding-left: 20px;
}
.chat-msg.bot .chat-list:last-child { margin-bottom: 0; }
.chat-msg.bot .chat-list li { margin: 4px 0; }
.chat-msg.bot strong { font-weight: 600; }

/* Индикатор «печатает…» */
.chat-typing { min-width: 56px; }
.typing-dots {
  display: inline-flex;
  gap: 4px;
  align-items: center;
}
.typing-dots span {
  display: inline-block;
  font-size: 18px;
  color: var(--violet-2);
  animation: chatDot 1.2s infinite ease-in-out;
}
.typing-dots span:nth-child(2) { animation-delay: .2s; }
.typing-dots span:nth-child(3) { animation-delay: .4s; }
@keyframes chatDot {
  0%, 80%, 100% { opacity: 0.2; transform: translateY(0); }
  40%            { opacity: 1;   transform: translateY(-4px); }
}

.chat-input-row {
  display: flex;
  gap: 8px;
  padding: 10px 14px 14px;
  border-top: 1px solid var(--card-line);
  flex-shrink: 0;
}
.chat-input {
  flex: 1;
  padding: 10px 13px;
  border: 1px solid var(--card-line);
  border-radius: 10px;
  font-size: 14.5px;
  font-family: inherit;
  background: rgba(11,5,24,0.6);
  color: var(--ink);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.chat-input::placeholder { color: var(--muted-2); }
.chat-input:focus { border-color: var(--violet-2); box-shadow: 0 0 0 3px rgba(139,92,246,0.22); }
.chat-send-btn {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-size: 18px;
  background: linear-gradient(135deg, var(--violet) 0%, var(--violet-2) 100%);
  color: #fff;
  transition: opacity .15s, transform .15s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.chat-send-btn:hover { opacity: 0.9; transform: scale(1.06); }
.chat-send-btn:disabled { opacity: 0.45; cursor: default; transform: none; }

/* Мобайл — панель на весь экран */
@media (max-width: 640px) {
  .chat-panel {
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    max-height: 100dvh;
    border-radius: var(--card-radius) var(--card-radius) 0 0;
  }
  .chat-fab {
    right: 16px;
    bottom: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .chat-panel { transition: none; }
  .chat-fab { transition: none; }
  .typing-dots span { animation: none; opacity: 1; }
  .chat-log { scroll-behavior: auto; }
}