/* ===== Артём — визитка. Стиль: чёрно-бело-серый минимализм (Lamoda-like) ===== */

:root {
  --black: #111111;
  --ink: #1a1a1a;
  --white: #ffffff;
  --gray-50: #fafafa;
  --gray-100: #f4f4f4;
  --gray-200: #ededed;
  --line: #e5e5e5;
  --muted: #8a8a8a;
  --muted-2: #6b6b6b;
  --max-w: 1180px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo { display: inline-flex; align-items: center; gap: 12px; }
.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  background: var(--black);
  color: var(--white);
  font-weight: 600;
  font-size: 15px;
  border-radius: 2px;
}
.logo-text {
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.nav {
  display: flex;
  gap: 38px;
  margin-left: auto;
  margin-right: 32px;
}
.nav a {
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
  transition: color 0.2s var(--ease);
}
.nav a:hover { color: var(--black); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  padding: 14px 28px;
  border-radius: 2px;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-dark { background: var(--black); color: var(--white); border-color: var(--black); }
.btn-dark:hover { background: #000; }
.btn-light { background: var(--white); color: var(--black); border-color: var(--black); }
.btn-light:hover { background: var(--black); color: var(--white); }
.btn-sm { padding: 10px 20px; font-size: 12px; }
.btn-lg { padding: 17px 36px; }
.nav-cta { }

/* ===== Hero ===== */
.hero { padding: 96px 0 80px; border-bottom: 1px solid var(--line); }
.eyebrow {
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 28px;
}
.hero-title {
  font-size: clamp(40px, 7vw, 88px);
  line-height: 1.02;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--black);
  margin-bottom: 30px;
}
.hero-lead {
  max-width: 580px;
  font-size: clamp(16px, 2vw, 19px);
  color: var(--muted-2);
  margin-bottom: 40px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 72px; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
}
.stat {
  padding: 26px 28px;
  border-right: 1px solid var(--line);
}
.stat:first-child { padding-left: 0; }
.stat:last-child { border-right: none; padding-right: 0; }
.stat dt {
  font-weight: 600;
  font-size: 18px;
  color: var(--black);
  letter-spacing: -0.01em;
}
.stat dd {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 6px;
}

/* ===== Sections ===== */
.section { padding: 92px 0; }
.section-head { margin-bottom: 52px; }
.section-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(30px, 4.5vw, 48px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--black);
}

/* ===== Services grid ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.card {
  background: var(--white);
  padding: 44px 40px;
  transition: background 0.3s var(--ease);
}
.card:hover { background: var(--gray-50); }
.card-num {
  display: block;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 22px;
}
.card h3 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  color: var(--black);
}
.card p { color: var(--muted-2); font-size: 16px; }

/* ===== Featured project ===== */
.project { background: var(--gray-100); }
.project-card {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  background: var(--white);
  border: 1px solid var(--line);
}
.project-body { padding: 56px 52px; }
.project-tag {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
}
.project-name {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--black);
  margin-bottom: 20px;
}
.project-desc { color: var(--muted-2); font-size: 17px; margin-bottom: 28px; max-width: 560px; }
.project-features { list-style: none; margin-bottom: 36px; }
.project-features li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 16px;
}
.project-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 12px;
  height: 1px;
  background: var(--black);
}
.project-actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* Фирменный бренд «Эон ИИ»: градиент + белая монограмма (как иконка приложения). */
.project-aside {
  background: linear-gradient(135deg, #4338ca 0%, #6d28d9 52%, #7c3aed 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 26px;
  position: relative;
  overflow: hidden;
}
.project-aside::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 80% at 78% 10%, rgba(255,255,255,0.16), transparent 62%);
}
.eon-badge {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 128px;
  height: 128px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.28);
  box-shadow: 0 18px 44px rgba(40, 12, 90, 0.38);
}
.eon-mono { width: 58%; height: 58%; }
.eon-wordmark {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: baseline;
  gap: 0.28em;
  font-weight: 800;
  font-size: 30px;
  letter-spacing: -0.01em;
  color: #fff;
  line-height: 1;
}
.eon-wordmark i { font-style: normal; color: rgba(255, 255, 255, 0.72); }

/* ===== More work ===== */
.works-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.work-card {
  background: var(--white);
  padding: 46px 42px;
  transition: background 0.3s var(--ease);
}
.work-card:hover { background: var(--gray-50); }
.work-kicker {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 18px;
}
.work-card h3 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  color: var(--black);
}
.work-card > p { color: var(--muted-2); font-size: 16px; margin-bottom: 26px; }
.work-tags { list-style: none; display: flex; flex-direction: column; gap: 11px; }
.work-tags li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
  color: var(--ink);
}
.work-tags li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 12px;
  height: 1px;
  background: var(--black);
}

/* ===== Approach ===== */
.approach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.approach-item { background: var(--white); padding: 40px 36px 44px 0; }
.approach-item:not(:first-child) { padding-left: 36px; }
.approach-num {
  display: block;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 18px;
}
.approach-item h3 { font-size: 21px; font-weight: 600; margin-bottom: 10px; color: var(--black); }
.approach-item p { color: var(--muted-2); font-size: 15px; }

/* ===== Contact ===== */
.contact { background: var(--black); }
.contact-inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
}
.contact-lead { flex: 1 1 360px; }
.contact .section-label { color: rgba(255,255,255,0.5); }
.contact-title {
  font-size: clamp(28px, 4.5vw, 50px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--white);
  line-height: 1.08;
}
.contact-note {
  margin-top: 22px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.55);
}
.contact-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 0 0 auto;
  min-width: 240px;
}
.contact-actions .btn { width: 100%; }
.contact .btn-dark { background: var(--white); color: var(--black); border-color: var(--white); }
.contact .btn-dark:hover { background: var(--gray-200); }
.contact .btn-light { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.5); }
.contact .btn-light:hover { background: var(--white); color: var(--black); border-color: var(--white); }

/* ===== Footer ===== */
.site-footer { padding: 38px 0; border-top: 1px solid var(--line); }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--muted-2);
}
.footer-meta { font-size: 13px; color: var(--muted); letter-spacing: 0.04em; }

/* ===== Reveal animation ===== */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 860px) {
  .nav { display: none; }
  .project-card { grid-template-columns: 1fr; }
  .project-aside { min-height: 220px; order: -1; }
  .approach-grid { grid-template-columns: 1fr; }
  .approach-item { padding: 32px 0 !important; border-bottom: 1px solid var(--line); }
  .approach-item:last-child { border-bottom: none; }
}
@media (max-width: 620px) {
  .container { padding: 0 20px; }
  .hero { padding: 56px 0 52px; }
  .section { padding: 60px 0; }
  .section-head { margin-bottom: 38px; }
  .grid { grid-template-columns: 1fr; }
  .card { padding: 36px 26px; }
  .works-grid { grid-template-columns: 1fr; }
  .work-card { padding: 34px 24px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-right: none; padding: 22px 0; border-bottom: 1px solid var(--line); }
  .stat:nth-child(odd) { border-right: 1px solid var(--line); padding-right: 24px; }
  .project-body { padding: 36px 22px; }
  .nav-cta { display: none; }
  .contact-inner { align-items: stretch; }
  .contact-actions { width: 100%; min-width: 0; }

  /* Кнопки-CTA на узком экране — на всю ширину, удобно нажимать. */
  .hero-actions, .project-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn, .project-actions .btn { width: 100%; }
}