/* iamai.expert — тёмная премиум-тема в палитре презентации */

:root {
  --bg: #0A0E1A;
  --bg-alt: #0D1322;
  --panel: #101727;
  --panel-2: #141B2B;
  --panel-3: #18223A;
  --border: #223049;
  --text: #F1F5F9;
  --text-soft: #CBD5E1;
  --muted: #94A3B8;
  --faint: #64748B;
  --cyan: #22D3EE;
  --violet: #A78BFA;
  --radius: 14px;
  --font: "Inter", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow { max-width: 780px; }

h1, h2, h3 { color: var(--text); line-height: 1.2; font-weight: 700; }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.2rem); letter-spacing: -0.01em; margin-bottom: 16px; }
h3 { font-size: 1.1rem; margin-bottom: 8px; }

.accent-gradient {
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow {
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.lead {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--muted);
  max-width: 640px;
  margin-top: 18px;
}

.section-sub { color: var(--muted); max-width: 640px; margin-bottom: 8px; }
.section-note { color: var(--faint); font-size: 0.92rem; margin-top: 28px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--cyan); color: #06121a; padding: 8px 16px; z-index: 200;
}
.skip-link:focus { left: 0; }

/* ---------- Кнопки ---------- */

.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-lg { padding: 14px 30px; font-size: 1.02rem; }

.btn-primary {
  background: linear-gradient(90deg, var(--cyan), #38BDF8);
  color: #06121A;
}
.btn-primary:hover { box-shadow: 0 6px 24px rgba(34, 211, 238, 0.35); }

.btn-ghost {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ---------- Шапка ---------- */

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; gap: 28px;
  height: 68px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo:hover { text-decoration: none; }
.logo-mark {
  width: 26px; height: 26px; border-radius: 8px;
  background: conic-gradient(from 210deg, var(--cyan), var(--violet), var(--cyan));
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.45);
}
.logo-text { color: var(--text); font-weight: 800; letter-spacing: 0.06em; font-size: 1.02rem; }
.logo-dot { color: var(--cyan); }

.site-nav { margin-left: auto; }
.site-nav ul { display: flex; gap: 6px; list-style: none; }
.site-nav a {
  display: block; padding: 8px 13px; border-radius: 8px;
  color: var(--muted); font-size: 0.94rem; font-weight: 500;
}
.site-nav a:hover { color: var(--text); text-decoration: none; background: var(--panel-2); }
.site-nav a.active { color: var(--cyan); background: rgba(34, 211, 238, 0.08); }

.header-cta { white-space: nowrap; }

.nav-toggle {
  display: none;
  background: none; border: 1px solid var(--border); border-radius: 8px;
  width: 42px; height: 38px; cursor: pointer;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span {
  display: block; width: 18px; height: 2px; background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 110px 0 90px;
  overflow: hidden;
  text-align: left;
}
.hero-glow {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(600px 400px at 78% 10%, rgba(167, 139, 250, 0.16), transparent 65%),
    radial-gradient(700px 500px at 12% 85%, rgba(34, 211, 238, 0.12), transparent 65%);
}
.hero .container { position: relative; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

.page-hero {
  position: relative;
  padding: 80px 0 30px;
  background:
    radial-gradient(500px 300px at 80% 0%, rgba(167, 139, 250, 0.12), transparent 65%),
    radial-gradient(500px 300px at 5% 100%, rgba(34, 211, 238, 0.08), transparent 65%);
}

/* ---------- Секции и карточки ---------- */

.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.cards { display: grid; gap: 18px; margin-top: 32px; }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: rgba(34, 211, 238, 0.45); transform: translateY(-3px); }
.card p { color: var(--muted); font-size: 0.95rem; }
.card-icon { font-size: 1.4rem; color: var(--cyan); margin-bottom: 14px; }
.card-tag {
  color: var(--violet); font-size: 0.8rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 10px;
}

/* ---------- Лестница зрелости ---------- */

.ladder {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  align-items: end;
  margin-top: 40px;
}
.ladder-step {
  background: linear-gradient(180deg, var(--panel-3), var(--panel));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 18px;
  min-height: calc(120px + var(--h) * 34px);
  display: flex; flex-direction: column; justify-content: flex-start;
}
.ladder-step-top {
  border-color: rgba(167, 139, 250, 0.5);
  background: linear-gradient(180deg, rgba(167, 139, 250, 0.14), var(--panel));
}
.ladder-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 50%;
  background: rgba(34, 211, 238, 0.12); color: var(--cyan);
  font-weight: 700; margin-bottom: 12px; font-size: 0.9rem;
}
.ladder-step p { color: var(--muted); font-size: 0.88rem; }

/* ---------- Шаги процесса ---------- */

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  margin-top: 36px;
  counter-reset: step;
}
.steps li {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 18px;
  position: relative;
}
.step-num {
  display: block;
  font-size: 0.85rem; font-weight: 800; letter-spacing: 0.1em;
  color: var(--violet); margin-bottom: 12px;
}
.steps h3 { font-size: 1rem; }
.steps p { color: var(--muted); font-size: 0.88rem; }

/* ---------- Сравнение подходов ---------- */

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 32px; }
.compare-col {
  border-radius: var(--radius);
  padding: 28px 26px;
  border: 1px solid var(--border);
}
.compare-old { background: var(--panel); }
.compare-old h3 { color: var(--muted); }
.compare-new {
  background: linear-gradient(160deg, rgba(34, 211, 238, 0.10), rgba(167, 139, 250, 0.10));
  border-color: rgba(34, 211, 238, 0.4);
}
.compare-col ul { list-style: none; margin-top: 16px; display: grid; gap: 10px; }
.compare-col li { padding-left: 24px; position: relative; color: var(--text-soft); }
.compare-old li::before { content: "—"; position: absolute; left: 0; color: var(--faint); }
.compare-new li::before { content: "✦"; position: absolute; left: 0; color: var(--cyan); }

/* ---------- Сетка ролей ---------- */

.roles-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 32px;
}
.roles-grid li {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  color: var(--text);
  font-weight: 600;
  text-align: center;
}

/* ---------- Отраслевые карточки ---------- */

.industry { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 32px; }
.industry-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
}
.industry-card ul { list-style: none; margin-top: 14px; display: grid; gap: 9px; }
.industry-card li { padding-left: 22px; position: relative; color: var(--muted); font-size: 0.95rem; }
.industry-card li::before { content: "•"; position: absolute; left: 4px; color: var(--cyan); }
.industry-card-your {
  border-style: dashed;
  border-color: rgba(167, 139, 250, 0.5);
  display: flex; flex-direction: column; gap: 14px; align-items: flex-start;
}
.industry-card-your p { color: var(--muted); }

/* ---------- Цены ---------- */

.pricing { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 32px; }
.price-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  display: flex; flex-direction: column;
}
.price-card-featured {
  border-color: rgba(34, 211, 238, 0.55);
  background: linear-gradient(180deg, rgba(34, 211, 238, 0.07), var(--panel));
  box-shadow: 0 10px 40px rgba(34, 211, 238, 0.08);
}
.price { margin: 6px 0 2px; }
.price span {
  font-size: 1.25rem; font-weight: 800; color: var(--text);
}
.price-term { color: var(--faint); font-size: 0.85rem; margin-bottom: 14px; }
.price-card ul { list-style: none; display: grid; gap: 9px; margin-bottom: 22px; flex: 1; }
.price-card li { padding-left: 20px; position: relative; color: var(--muted); font-size: 0.9rem; }
.price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--cyan); font-weight: 700; }
.price-card .btn { align-self: stretch; text-align: center; }

/* ---------- CTA-полоса ---------- */

.cta-band {
  background:
    radial-gradient(500px 260px at 85% 50%, rgba(167, 139, 250, 0.16), transparent 70%),
    var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cta-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px; flex-wrap: wrap;
}
.cta-inner p { color: var(--muted); max-width: 560px; }
.cta-chain { margin-top: 14px; color: var(--text); font-weight: 600; }
.cta-chain span { color: var(--cyan); padding: 0 6px; }

/* ---------- Контакты и форма ---------- */

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 48px;
  align-items: start;
}
.contact-list { list-style: none; margin-top: 24px; display: grid; gap: 18px; }
.contact-label {
  display: block; color: var(--faint); font-size: 0.8rem;
  text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 4px;
}
.contact-list a, .contact-list span:not(.contact-label) { font-size: 1.05rem; }

.contact-form-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 32px;
}
.contact-form { margin-top: 20px; display: grid; gap: 18px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-row label { display: block; color: var(--text); font-weight: 600; font-size: 0.92rem; margin-bottom: 7px; }
.form-row input[type="text"],
.form-row input[type="email"],
.form-row input[type="tel"],
.form-row textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  color: var(--text);
  font: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-row input:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}
.form-row textarea { resize: vertical; min-height: 120px; }

.captcha-row { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.captcha-row img { border-radius: 10px; flex: 0 0 auto; }
.captcha-row input { max-width: 180px; }
.captcha-refresh {
  background: none; border: none; padding: 0; margin-top: 8px;
  color: var(--faint); font: inherit; font-size: 0.85rem;
  cursor: pointer; text-decoration: underline;
}
.captcha-refresh:hover { color: var(--cyan); }

.form-consent label {
  display: flex; gap: 10px; align-items: flex-start;
  font-weight: 400; color: var(--muted); font-size: 0.88rem; cursor: pointer;
}
.form-consent input { margin-top: 3px; accent-color: var(--cyan); }

.field-error { display: block; color: #FB7185; font-size: 0.85rem; margin-top: 6px; }
.form-error {
  background: rgba(251, 113, 133, 0.1);
  border: 1px solid rgba(251, 113, 133, 0.4);
  color: #FDA4AF;
  border-radius: 10px; padding: 12px 16px; margin-top: 16px; font-size: 0.92rem;
}
.form-note { color: var(--faint); font-size: 0.85rem; }
.form-success h2 { margin-bottom: 10px; }
.form-success p { color: var(--muted); margin-bottom: 22px; }

.hp-field { position: absolute !important; left: -9999px !important; height: 0; overflow: hidden; }

/* ---------- Таблица реквизитов ---------- */

.req-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 28px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.req-table th, .req-table td {
  padding: 15px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}
.req-table tr:last-child th, .req-table tr:last-child td { border-bottom: none; }
.req-table th { color: var(--muted); font-weight: 600; width: 40%; }
.req-table td { color: var(--text); }

/* ---------- Прочее ---------- */

.prose h2 { margin-top: 36px; font-size: 1.25rem; }
.prose p { margin-top: 12px; color: var(--muted); }

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 56px 0 0;
  margin-top: 40px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 32px;
  padding-bottom: 40px;
}
.footer-brand p { color: var(--faint); font-size: 0.92rem; margin-top: 16px; max-width: 280px; }
.footer-col h3 {
  font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--faint); margin-bottom: 14px;
}
.footer-col ul { list-style: none; display: grid; gap: 9px; }
.footer-col a { color: var(--muted); font-size: 0.94rem; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 24px;
  color: var(--faint); font-size: 0.85rem;
}

/* ---------- Адаптивность ---------- */

@media (max-width: 980px) {
  .cards-4, .pricing { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .header-cta { display: none; }
}

@media (max-width: 760px) {
  .site-nav {
    display: none;
    position: absolute; top: 68px; left: 0; right: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 20px;
  }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; gap: 2px; }
  .site-nav a { padding: 12px 10px; font-size: 1.05rem; }
  .nav-toggle { display: flex; margin-left: auto; }

  .hero { padding: 70px 0 60px; }
  .cards-2, .cards-3, .compare, .industry, .form-grid,
  .contact-layout { grid-template-columns: 1fr; }
  .ladder { grid-template-columns: repeat(2, 1fr); align-items: stretch; }
  .ladder-step { min-height: 0; }
  .steps { grid-template-columns: 1fr 1fr; }
  .roles-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-form-wrap { padding: 26px 20px; }
  .req-table th { width: auto; }
  .req-table th, .req-table td { display: block; padding: 10px 16px; }
  .req-table th { padding-bottom: 0; border-bottom: none; }
}

@media (max-width: 480px) {
  .cards-4, .pricing, .steps, .roles-grid, .ladder { grid-template-columns: 1fr; }
}