/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --blue: #F26A2E;
  --blue-dark: #d95820;
  --blue-light: #fff5f0;
  --blue-mid: #fde0cf;
  --accent: #1B2A6B;
  --text: #111827;
  --text-2: #374151;
  --text-3: #6B7280;
  --surface: #ffffff;
  --surface-2: #F9FAFB;
  --border: #E5E7EB;
  --green: #059669;
  --r8: 8px;
  --r12: 12px;
  --r16: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3 { font-family: 'Manrope', sans-serif; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); font-weight: 800; }
h3 { font-size: 1.1rem; font-weight: 700; }

.accent { color: var(--blue); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--r8);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover { background: var(--blue-dark); transform: translateY(-1px); box-shadow: 0 8px 24px rgba(242,106,46,0.35); }
.btn-ghost {
  background: transparent;
  color: var(--blue);
  border: none;
  padding-left: 0;
}
.btn-ghost:hover { opacity: 0.75; }
.btn-outline {
  background: transparent;
  color: var(--blue);
  border: 2px solid var(--blue);
}
.btn-outline:hover { background: var(--blue); color: #fff; }
.btn-nav {
  background: var(--blue);
  color: #fff;
  padding: 10px 20px;
  font-size: 0.9rem;
}
.btn-nav:hover { background: var(--blue-dark); }
.btn-white {
  background: #fff;
  color: var(--blue);
}
.btn-white:hover { background: var(--blue-light); }
.btn-full { width: 100%; }

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.nav.scrolled { box-shadow: var(--shadow); }
.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
}
.logo-img {
  height: 52px;
  width: auto;
  object-fit: contain;
  display: block;
}
.nav-links {
  display: flex;
  gap: 28px;
  flex: 1;
}
.nav-links a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--blue); }
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== HERO ===== */
.hero {
  padding: 100px 24px 80px;
  background: linear-gradient(160deg, #fff4f0 0%, #ffffff 50%, #f0f2fa 100%);
  /* Обёртка в контейнер чтобы ограничить макс-ширину */
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
  max-width: 1160px;
  margin: 0 auto;
}
.hero-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--blue-mid);
  color: var(--blue);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-title {
  margin-bottom: 20px;
  color: var(--text);
}
.hero-sub {
  font-size: 1.1rem;
  color: var(--text-2);
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-stats {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-n {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
}
.stat-l {
  display: block;
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: 4px;
}
.stat-div {
  width: 1px;
  height: 36px;
  background: var(--border);
}

/* ===== CHAT DEMO ===== */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.chat-demo {
  background: #fff;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
  overflow: hidden;
  border: 1px solid var(--border);
  /* Фиксируем общую высоту карточки */
  display: flex;
  flex-direction: column;
}
.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: var(--blue);
  color: #fff;
  flex-shrink: 0;
}
.chat-avatar {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}
.chat-name { font-weight: 600; font-size: 0.95rem; }
.chat-status { font-size: 0.75rem; opacity: 0.85; }
.chat-messages {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  /* Фиксированная высота — не растягивается */
  height: 310px;
  min-height: 310px;
  max-height: 310px;
  overflow: hidden;
  position: relative;
  flex-shrink: 0;
}
.msg {
  max-width: 82%;
  /* Плавное появление */
  animation: fadeMsg 0.3s ease forwards;
}
@keyframes fadeMsg {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.msg p {
  padding: 9px 12px;
  border-radius: 12px;
  font-size: 0.83rem;
  line-height: 1.45;
  margin: 0;
  word-break: break-word;
}
.msg-bot p {
  background: var(--surface-2);
  color: var(--text);
  border-radius: 4px 12px 12px 12px;
}
.msg-user {
  align-self: flex-end;
}
.msg-user p {
  background: var(--blue);
  color: #fff;
  border-radius: 12px 4px 12px 12px;
}
.msg.typing p {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 12px 14px;
}
.msg.typing span {
  width: 6px; height: 6px;
  background: var(--text-3);
  border-radius: 50%;
  animation: bounce 1.2s infinite;
}
.msg.typing span:nth-child(2) { animation-delay: 0.2s; }
.msg.typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
  0%, 100% { transform: translateY(0); opacity: 0.4; }
  50% { transform: translateY(-4px); opacity: 1; }
}

/* ===== SECTIONS ===== */
.section {
  padding: 96px 0;
}
.section-tag {
  display: inline-block;
  background: var(--blue-mid);
  color: var(--blue);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.section-title {
  margin-bottom: 16px;
}
.section-sub {
  font-size: 1rem;
  color: var(--text-3);
  margin-bottom: 40px;
}

/* ===== PROBLEM ===== */
.problem { background: var(--surface-2); }
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.problem-card {
  background: #fff;
  border-radius: var(--r16);
  padding: 32px;
  border: 1px solid var(--border);
}
.problem-icon { font-size: 2rem; margin-bottom: 16px; }
.problem-card h3 { margin-bottom: 10px; }
.problem-card p { color: var(--text-2); font-size: 0.95rem; }

/* ===== HOW IT WORKS ===== */
.steps {
  margin-top: 56px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.step {
  display: flex;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.step:last-child { border-bottom: none; }
.step-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--blue-mid);
  flex-shrink: 0;
  width: 80px;
  line-height: 1;
  font-family: 'Manrope', sans-serif;
}
.step-body h3 { margin-bottom: 8px; font-size: 1.15rem; }
.step-body p { color: var(--text-2); }

/* ===== COMPARE ===== */
.compare { background: var(--surface-2); }
.compare-table {
  margin-top: 48px;
  border-radius: var(--r16);
  overflow: hidden;
  border: 1px solid var(--border);
}
.compare-head {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  background: var(--text);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
}
.compare-col { padding: 16px 20px; }
.compare-col-new { background: var(--blue); }
.compare-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  border-top: 1px solid var(--border);
}
.compare-row:nth-child(even) { background: #FAFAFA; }
.compare-feature, .compare-old, .compare-new { padding: 14px 20px; font-size: 0.9rem; }
.compare-feature { font-weight: 600; color: var(--text-2); }
.compare-old { color: var(--text-3); }
.compare-new { color: var(--green); font-weight: 500; background: #F0FDF4; }

/* ===== ROI CALC ===== */
.results { background: var(--blue); color: #fff; }
.results .section-tag { background: rgba(255,255,255,0.2); color: #fff; }
.results .section-title { color: #fff; }
.results .section-sub { color: rgba(255,255,255,0.8); }
.roi-calc {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 40px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--r16);
  padding: 40px;
  backdrop-filter: blur(8px);
}
.roi-inputs { display: flex; flex-direction: column; gap: 20px; }
.roi-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: rgba(255,255,255,0.85);
}
.roi-field input {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--r8);
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}
.roi-field input::placeholder { color: rgba(255,255,255,0.4); }
.roi-field input:focus { border-color: rgba(255,255,255,0.6); }
.roi-result {
  display: flex;
  flex-direction: column;
  gap: 20px;
  justify-content: center;
}
.roi-block {
  background: rgba(255,255,255,0.1);
  border-radius: var(--r12);
  padding: 20px 24px;
}
.roi-block-main {
  background: rgba(255,255,255,0.2);
}
.roi-label { font-size: 0.85rem; color: rgba(255,255,255,0.75); margin-bottom: 4px; }
.roi-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  font-family: 'Manrope', sans-serif;
}
.roi-note {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.55);
}

/* ===== CASES ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.case-card {
  background: var(--surface-2);
  border-radius: var(--r16);
  padding: 32px;
  border: 1px solid var(--border);
}
.case-niche {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--blue);
  margin-bottom: 12px;
}
.case-metric {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text);
  font-family: 'Manrope', sans-serif;
  line-height: 1;
  margin-bottom: 12px;
}
.case-desc {
  font-size: 0.9rem;
  color: var(--text-2);
  margin-bottom: 16px;
}
.case-tag {
  font-size: 0.8rem;
  color: var(--text-3);
}

/* ===== PRICING ===== */
.pricing { background: var(--surface-2); }
.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
  align-items: start;
}
.plan {
  background: #fff;
  border-radius: var(--r16);
  padding: 32px;
  border: 1px solid var(--border);
  position: relative;
}
.plan-popular {
  border-color: var(--blue);
  box-shadow: 0 0 0 2px var(--blue);
  transform: translateY(-8px);
}
.plan-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--blue);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 100px;
  white-space: nowrap;
}
.plan-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-3);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.plan-price {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  font-family: 'Manrope', sans-serif;
  margin-bottom: 24px;
}
.plan-price span { font-size: 1rem; font-weight: 500; color: var(--text-3); }
.plan-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}
.plan-features li { font-size: 0.88rem; color: var(--text-2); }
.pilot-banner {
  margin-top: 48px;
  background: var(--blue);
  border-radius: var(--r16);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.pilot-banner h3 { color: #fff; font-size: 1.3rem; margin-bottom: 8px; }
.pilot-banner p { color: rgba(255,255,255,0.85); font-size: 0.95rem; max-width: 560px; }
.pilot-text { flex: 1; }

/* ===== FAQ ===== */
.faq-list {
  margin-top: 48px;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  gap: 16px;
  font-family: inherit;
}
.faq-q:hover { color: var(--blue); }
.faq-arrow {
  flex-shrink: 0;
  font-size: 1.2rem;
  color: var(--text-3);
  transition: transform 0.3s;
}
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
}
.faq-item.open .faq-a { max-height: 300px; padding-bottom: 20px; }
.faq-a p { color: var(--text-2); font-size: 0.95rem; line-height: 1.7; }

/* ===== CONTACT ===== */
.contact { background: var(--surface-2); }
.contact-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
  background: #fff;
  border-radius: 24px;
  padding: 56px;
  box-shadow: var(--shadow);
}
.contact-text h2 { margin-bottom: 16px; }
.contact-text p { color: var(--text-2); margin-bottom: 24px; }
.contact-perks {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.contact-perks li { font-size: 0.95rem; color: var(--text-2); }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
}
.form-group input, .form-group textarea {
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--r8);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  outline: none;
  transition: border-color var(--transition);
  background: #fff;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--blue); }
.form-group input.error, .form-group textarea.error { border-color: #EF4444; }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-error { font-size: 0.8rem; color: #EF4444; min-height: 18px; }
.form-privacy {
  font-size: 0.78rem;
  color: var(--text-3);
  text-align: center;
}
.form-privacy a { color: var(--blue); }
.form-success {
  text-align: center;
  padding: 32px;
  background: #F0FDF4;
  border-radius: var(--r12);
  border: 1px solid #BBF7D0;
}
.success-icon { font-size: 2.5rem; margin-bottom: 12px; }
.form-success h3 { color: var(--green); margin-bottom: 8px; }
.form-success p { color: var(--text-2); font-size: 0.9rem; }

/* ===== FOOTER ===== */
.footer {
  background: var(--text);
  padding: 40px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer .logo-img { height: 46px; }
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  color: #9CA3AF;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition);
}
.footer-links a:hover { color: #fff; }
.footer-copy {
  color: #6B7280;
  font-size: 0.85rem;
}

/* ===== ANIMATIONS ===== */
.fade-up {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  /* Чат идёт ПЕРВЫМ — визуальный крючок */
  .hero-visual {
    order: -1;
  }
  .hero-text {
    order: 1;
  }
  .chat-demo {
    max-width: 520px;
    margin: 0 auto;
  }
  .problem-grid, .cases-grid { grid-template-columns: 1fr 1fr; }
  .plans { grid-template-columns: 1fr; max-width: 440px; margin-left: auto; margin-right: auto; }
  .plan-popular { transform: none; }
  .roi-calc { grid-template-columns: 1fr; }
  .contact-box { grid-template-columns: 1fr; padding: 40px; }
}

@media (max-width: 768px) {
  .nav-links, .btn-nav { display: none; }
  .burger { display: flex; }
  .nav-inner { position: relative; }

  /* — Hero — */
  .hero {
    padding: 88px 16px 60px;
  }
  .hero-inner {
    gap: 20px;
  }
  .hero-visual {
    order: -1;
  }
  /* Чат на мобайле — ширина 100%, высота фиксирована */
  .chat-demo {
    max-width: 100%;
    border-radius: 16px;
  }
  .chat-messages {
    height: 210px;
    min-height: 210px;
    max-height: 210px;
    padding: 14px 16px;
    gap: 8px;
  }
  .msg p {
    font-size: 0.82rem;
    padding: 9px 12px;
  }
  .chat-header {
    padding: 14px 16px;
  }
  .hero-title { font-size: clamp(1.6rem, 6vw, 2.4rem); }
  .hero-sub { font-size: 0.95rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; gap: 12px; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  .problem-grid, .cases-grid { grid-template-columns: 1fr; }
  .compare-head, .compare-row {
    grid-template-columns: 1fr;
  }
  .compare-col-empty { display: none; }
  .compare-col-old { background: #F9FAFB; }
  .compare-feature {
    background: var(--surface-2);
    font-weight: 700;
    border-bottom: 1px solid var(--border);
  }
  .pilot-banner {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-stats { gap: 16px; }
  .stat-div { display: none; }
  .contact-box { padding: 28px 20px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: 16px; }
}

/* Mobile nav overlay */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.98);
  z-index: 99;
  flex-direction: column;
  padding: 32px 24px;
  gap: 8px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  color: var(--text);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 600;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}