/* ===== Переменные и сброс ===== */
:root {
  --bg: #07070d;
  --bg-alt: #0b0b14;
  --surface: #111120;
  --surface-2: #171729;
  --border: rgba(255, 255, 255, 0.09);
  --text: #f5f5fa;
  --muted: #a3a3bd;
  --violet: #7c5cff;
  --blue: #3d8bff;
  --grad: linear-gradient(135deg, var(--violet), var(--blue));
  --radius: 18px;
  --header-h: 72px;
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  overflow-x: hidden;
}

img, svg { max-width: 100%; }
h1, h2, h3, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

:focus-visible {
  outline: 3px solid #a99bff;
  outline-offset: 3px;
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  background: var(--violet);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  z-index: 200;
  transition: top 0.2s;
}
.skip-link:focus { top: 12px; }

/* ===== Кнопки ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 16px;
  line-height: 1.2;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.28);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(124, 92, 255, 0.42);
}
.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.22);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--violet);
  background: rgba(124, 92, 255, 0.12);
  transform: translateY(-2px);
}
.btn-sm { padding: 10px 18px; font-size: 15px; }
.btn-block { width: 100%; }
.btn[disabled], .btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.btn[disabled]:hover, .btn[aria-disabled="true"]:hover {
  transform: none;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.22);
}

/* ===== Шапка ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(7, 7, 13, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.site-header.scrolled {
  border-bottom-color: var(--border);
  background: rgba(7, 7, 13, 0.9);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
  font-size: 18px;
}
.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--grad);
  position: relative;
}
.logo-mark::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 2.5px solid #fff;
  border-top-color: transparent;
  border-right-color: transparent;
  transform: rotate(-45deg) scale(0.8);
  border-radius: 2px;
}

.site-nav ul { display: flex; gap: 6px; }
.site-nav a {
  display: block;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.site-nav a:hover { color: var(--text); background: rgba(255, 255, 255, 0.06); }
.site-nav a.active { color: var(--text); }
.nav-cta-mobile { display: none; }

.header-cta { padding: 11px 20px; font-size: 15px; }

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.2s;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Общие секции ===== */
.section { padding: 110px 0; position: relative; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 16px;
}

h1 { font-size: clamp(38px, 6vw, 68px); line-height: 1.08; letter-spacing: -0.02em; font-weight: 800; }
h2 { font-size: clamp(30px, 4vw, 46px); line-height: 1.15; letter-spacing: -0.015em; font-weight: 750; }
h3 { font-size: 21px; line-height: 1.3; font-weight: 650; }

.section-head { max-width: 680px; margin-bottom: 56px; }
.section-lead { color: var(--muted); margin-top: 16px; font-size: 18px; }

/* ===== Главный экран ===== */
.hero { position: relative; padding: 90px 0 110px; overflow: hidden; }
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 70% 40%, #000 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 70% at 70% 40%, #000 20%, transparent 75%);
  opacity: 0.55;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.hero-text .lead { color: var(--muted); font-size: 19px; margin: 26px 0 36px; max-width: 560px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  width: 100%;
  max-width: 480px;
  margin-left: auto;
}
.glow {
  position: absolute;
  inset: 18%;
  background: radial-gradient(circle, rgba(124, 92, 255, 0.5), rgba(61, 139, 255, 0.18) 55%, transparent 72%);
  filter: blur(30px);
}
.ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(124, 92, 255, 0.35);
}
.ring-1 { inset: 0; animation: spin 40s linear infinite; border-style: dashed; }
.ring-2 { inset: 12%; border-color: rgba(61, 139, 255, 0.3); animation: spin 55s linear infinite reverse; }
.ring-3 { inset: 26%; border-color: rgba(255, 255, 255, 0.1); }

.mock {
  position: absolute;
  inset: 22% 8% 22% 8%;
  background: linear-gradient(160deg, rgba(23, 23, 41, 0.95), rgba(14, 14, 26, 0.95));
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(124, 92, 255, 0.12);
  overflow: hidden;
  animation: float 7s ease-in-out infinite;
}
.mock-bar { display: flex; gap: 6px; padding: 12px 14px; border-bottom: 1px solid var(--border); }
.mock-bar i { width: 9px; height: 9px; border-radius: 50%; background: rgba(255, 255, 255, 0.2); }
.mock-body { padding: 18px 18px 20px; display: grid; gap: 10px; }
.mock-line { height: 9px; border-radius: 6px; background: rgba(255, 255, 255, 0.12); }
.mock-line.accent { background: var(--grad); height: 12px; }
.w60 { width: 60%; } .w75 { width: 75%; } .w90 { width: 90%; }
.mock-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 6px; }
.mock-grid span { height: 44px; border-radius: 8px; background: rgba(124, 92, 255, 0.14); border: 1px solid rgba(124, 92, 255, 0.28); }
.mock-btn { width: 38%; height: 26px; border-radius: 8px; background: var(--grad); margin-top: 6px; }

.chip {
  position: absolute;
  padding: 8px 14px;
  border-radius: 10px;
  background: rgba(17, 17, 32, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.14);
  font-family: Consolas, "Courier New", monospace;
  font-size: 14px;
  color: #cfc6ff;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}
.chip-1 { top: 10%; right: 6%; animation: float 6s ease-in-out infinite; }
.chip-2 { bottom: 12%; left: 2%; color: #a6ceff; animation: float 8s ease-in-out infinite reverse; }
.chip-3 { bottom: 6%; right: 12%; animation: float 7s ease-in-out infinite 0.8s; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ===== Карточки ===== */
.cards { display: grid; gap: 24px; }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 92, 255, 0.5);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}
.card-sm { padding: 28px; }
.card-sm h3 { margin-bottom: 10px; }
.card-sm p { color: var(--muted); font-size: 16px; }
.card-num {
  display: inline-block;
  font-family: Consolas, "Courier New", monospace;
  font-size: 14px;
  color: var(--violet);
  margin-bottom: 14px;
}
.card h3 { margin-bottom: 10px; }
.card > p { color: var(--muted); }

.check-list { margin-top: 20px; display: grid; gap: 10px; }
.check-list li {
  position: relative;
  padding-left: 28px;
  color: #d6d6e6;
  font-size: 16px;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 14px;
  height: 8px;
  border-left: 2.5px solid var(--blue);
  border-bottom: 2.5px solid var(--blue);
  transform: rotate(-45deg);
}

/* ===== Проекты ===== */
.project {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.project:hover {
  transform: translateY(-4px);
  border-color: rgba(61, 139, 255, 0.5);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}
.thumb {
  height: 190px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 32px 32px;
}
.thumb span {
  position: relative;
  font-weight: 800;
  letter-spacing: 0.22em;
  font-size: clamp(20px, 3vw, 28px);
  text-shadow: 0 4px 18px rgba(0, 0, 0, 0.4);
}
.thumb-blackline { background: linear-gradient(135deg, #15151a, #2a2a33); }
.thumb-blackline span { color: #e8e8ee; }
.thumb-shine { background: linear-gradient(135deg, #0c2a4d, #1e6fd0); }
.thumb-prime { background: linear-gradient(135deg, #1a1535, #4a3a8f); }
.thumb-nova { background: linear-gradient(135deg, #2a1a6e, #2459b8); }

.project-body { padding: 28px; display: flex; flex-direction: column; flex: 1; }
.tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #bdb1ff;
  background: rgba(124, 92, 255, 0.14);
  border: 1px solid rgba(124, 92, 255, 0.3);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.project-body h3 { margin-bottom: 10px; }
.project-body > p:not(.tag) { color: var(--muted); font-size: 16px; }
.project-action { margin-top: auto; padding-top: 22px; }
.link-note { display: block; margin-top: 8px; font-size: 13px; color: var(--muted); }

/* ===== Этапы ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  counter-reset: step;
  position: relative;
}
.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: border-color 0.3s, transform 0.3s;
}
.step:hover { border-color: rgba(124, 92, 255, 0.5); transform: translateY(-4px); }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--grad);
  font-weight: 700;
  margin-bottom: 18px;
}
.step h3 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 15px; line-height: 1.55; }

/* ===== Призыв ===== */
.cta-section { padding: 90px 0; }
.cta-box {
  text-align: center;
  padding: 72px 32px;
  border-radius: 28px;
  border: 1px solid rgba(124, 92, 255, 0.35);
  background:
    radial-gradient(ellipse 60% 120% at 20% 0%, rgba(124, 92, 255, 0.25), transparent 60%),
    radial-gradient(ellipse 60% 120% at 80% 100%, rgba(61, 139, 255, 0.2), transparent 60%),
    var(--surface);
}
.cta-box h2 { max-width: 720px; margin: 0 auto 16px; }
.cta-box p { color: var(--muted); max-width: 520px; margin: 0 auto 32px; font-size: 18px; }

/* ===== Форма ===== */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items: start; }
.note {
  margin-top: 26px;
  padding: 16px 18px;
  border-left: 3px solid var(--blue);
  background: rgba(61, 139, 255, 0.08);
  border-radius: 0 10px 10px 0;
  color: #c9d8f5;
  font-size: 15px;
}
.form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px;
  display: grid;
  gap: 20px;
}
.field label { display: block; font-size: 15px; font-weight: 600; margin-bottom: 8px; }
.req { color: #ff8fa3; }
.field input, .field select, .field textarea {
  width: 100%;
  background: #0a0a14;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  padding: 13px 15px;
  font-size: 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input::placeholder, .field textarea::placeholder { color: #6e6e8a; }
.field input:hover, .field select:hover, .field textarea:hover { border-color: rgba(124, 92, 255, 0.55); }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible {
  outline: none;
  border-color: var(--violet);
  box-shadow: 0 0 0 3px rgba(124, 92, 255, 0.35);
}
.field select option { background: #111120; color: var(--text); }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: #ff6b81; }
.error { color: #ff8fa3; font-size: 14px; min-height: 0; margin-top: 6px; }
.error:empty { display: none; }

.form-status {
  font-size: 15px;
  padding: 0;
  border-radius: 10px;
  line-height: 1.55;
}
.form-status:empty { display: none; }
.form-status.show {
  padding: 14px 16px;
  background: rgba(61, 139, 255, 0.1);
  border: 1px solid rgba(61, 139, 255, 0.4);
  color: #d4e3ff;
}

/* ===== FAQ ===== */
.faq-wrap { max-width: 820px; }
.faq-list { display: grid; gap: 12px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: border-color 0.25s;
}
.faq-item:hover, .faq-item.open { border-color: rgba(124, 92, 255, 0.5); }
.faq-item h3 { font-size: inherit; font-weight: inherit; }
.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: 22px 60px 22px 24px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  position: relative;
  border-radius: 14px;
}
.faq-q::before, .faq-q::after {
  content: "";
  position: absolute;
  right: 24px;
  top: 50%;
  width: 16px;
  height: 2px;
  background: var(--violet);
  transition: transform 0.3s;
}
.faq-q::after { transform: rotate(90deg); }
.faq-q[aria-expanded="true"]::after { transform: rotate(0deg); }
.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
}
.faq-a > div { overflow: hidden; }
.faq-a p { padding: 0 24px 24px; color: var(--muted); }
.faq-item.open .faq-a { grid-template-rows: 1fr; }

/* ===== Футер ===== */
.site-footer { border-top: 1px solid var(--border); padding-top: 56px; background: #050509; }
.footer-inner { display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.footer-brand p { color: var(--muted); margin-top: 12px; font-size: 15px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; align-content: flex-start; }
.footer-nav a { color: var(--muted); padding: 4px 0; transition: color 0.2s; }
.footer-nav a:hover { color: var(--text); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 40px;
  padding-top: 24px;
  padding-bottom: 32px;
  border-top: 1px solid var(--border);
  color: #7d7d98;
  font-size: 14px;
}

/* ===== Анимация появления ===== */
.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.js .reveal.visible { opacity: 1; transform: none; }

/* ===== Адаптивность ===== */
@media (max-width: 1060px) {
  .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  :root { --header-h: 66px; }
  .section { padding: 80px 0; }

  .menu-toggle { display: inline-flex; }
  .header-cta { display: none; }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(9, 9, 16, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 24px;
    display: none;
  }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; gap: 2px; }
  .site-nav a { padding: 14px 10px; font-size: 17px; }
  .nav-cta-mobile { display: block; margin-top: 12px; }
  .nav-cta-mobile .btn { color: #fff; width: 100%; }

  .hero { padding: 56px 0 80px; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { margin: 0 auto; max-width: 400px; }

  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 680px) {
  body { font-size: 16px; }
  .container { padding: 0 18px; }
  .cards-2, .cards-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .card, .form { padding: 26px 22px; }
  .btn-row .btn { width: 100%; }
  .cta-box { padding: 52px 22px; }
  .faq-q { font-size: 16px; padding: 18px 52px 18px 18px; }
  .faq-q::before, .faq-q::after { right: 18px; }
  .faq-a p { padding: 0 18px 20px; }
  .footer-bottom { flex-direction: column; }
}

/* ===== Уменьшенная анимация ===== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}