/* TechVision — фейковый сайт IT-компании (тёмная тема) */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #21262d;
  --border: #30363d;
  --text: #c9d1d9;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent2: #3fb950;
  --heading: #f0f6fc;
  --card-bg: #161b22;
  --radius: 8px;
  --nav-h: 64px;
}

html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: -apple-system, 'Segoe UI', sans-serif; font-size: 16px; line-height: 1.6; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: #79c0ff; }

/* КОНТЕЙНЕР */
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ШАПКА */
.header { position: sticky; top: 0; z-index: 100; background: rgba(13,17,23,.92); border-bottom: 1px solid var(--border); backdrop-filter: blur(6px); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); }
.logo { font-size: 20px; font-weight: 700; color: var(--heading); display: flex; align-items: center; gap: 8px; }
.logo-icon { color: var(--accent); font-size: 22px; }
.nav { display: flex; align-items: center; gap: 8px; }
.nav-list { display: flex; list-style: none; gap: 4px; }
.nav-link { display: block; padding: 8px 14px; color: var(--text-muted); border-radius: var(--radius); font-size: 15px; transition: color .2s, background .2s; }
.nav-link:hover, .nav-link.active { color: var(--heading); background: var(--bg3); }
.arrow { font-size: 11px; }
.btn-cta { padding: 8px 18px; background: var(--accent); color: #0d1117; border-radius: var(--radius); font-weight: 600; font-size: 14px; margin-left: 12px; transition: opacity .2s; }
.btn-cta:hover { opacity: .85; color: #0d1117; }
.burger { display: none; background: none; border: none; font-size: 22px; color: var(--text); cursor: pointer; }

/* DROPDOWN */
.dropdown { position: relative; }
.dropdown-menu { display: none; position: absolute; top: calc(100% + 4px); left: 0; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); min-width: 200px; padding: 8px 0; z-index: 200; }
.dropdown-menu li { list-style: none; }
.dropdown-menu a { display: block; padding: 10px 18px; color: var(--text-muted); font-size: 14px; transition: background .15s, color .15s; }
.dropdown-menu a:hover { background: var(--bg3); color: var(--heading); }

/* HERO */
.hero { padding: 80px 0 60px; }
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-tag { font-size: 13px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--accent); margin-bottom: 16px; }
.hero h1 { font-size: 2.6rem; font-weight: 700; color: var(--heading); line-height: 1.25; margin-bottom: 20px; }
.hero-sub { color: var(--text-muted); font-size: 17px; line-height: 1.7; margin-bottom: 32px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary { padding: 12px 24px; background: var(--accent); color: #0d1117; border-radius: var(--radius); font-weight: 600; transition: opacity .2s; }
.btn-primary:hover { opacity: .85; color: #0d1117; }
.btn-ghost { padding: 12px 24px; border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); transition: border-color .2s, color .2s; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.code-card { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.code-dots { padding: 12px 16px; display: flex; gap: 8px; border-bottom: 1px solid var(--border); }
.code-dots span { width: 12px; height: 12px; border-radius: 50%; background: var(--border); }
.code-dots span:nth-child(1) { background: #ff5f57; }
.code-dots span:nth-child(2) { background: #ffbd2e; }
.code-dots span:nth-child(3) { background: #28ca41; }
.code-card pre { padding: 20px 24px; font-family: 'Cascadia Code','Fira Code',monospace; font-size: 14px; line-height: 1.8; }
.kw { color: #ff7b72; } .str { color: #a5d6ff; } .num { color: #79c0ff; }

/* СТАТИСТИКА */
.stats { padding: 40px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg2); }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; text-align: center; }
.stat { padding: 20px; }
.stat-num { display: block; font-size: 2.2rem; font-weight: 700; color: var(--accent); margin-bottom: 4px; }
.stat span:last-child { color: var(--text-muted); font-size: 14px; }

/* СЕКЦИЯ */
.section { padding: 80px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-tag { font-size: 12px; text-transform: uppercase; letter-spacing: 2px; color: var(--accent); display: block; margin-bottom: 12px; }
.section-head h2 { font-size: 2rem; color: var(--heading); margin-bottom: 12px; }
.section-head p { color: var(--text-muted); max-width: 560px; margin: 0 auto; }

/* КАРТОЧКИ */
.cards-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.card { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 32px; transition: border-color .2s, transform .2s; }
.card:hover { border-color: var(--accent); transform: translateY(-3px); }
.card-icon { font-size: 32px; margin-bottom: 16px; }
.card h3 { color: var(--heading); font-size: 1.15rem; margin-bottom: 10px; }
.card p { color: var(--text-muted); font-size: 14px; line-height: 1.7; margin-bottom: 16px; }
.card-link { font-size: 14px; color: var(--accent); font-weight: 600; }

/* CTA */
.cta-section { padding: 80px 0; }
.cta-box { background: linear-gradient(135deg, #1c2b3a 0%, #1a2535 100%); border: 1px solid #264a6e; border-radius: 16px; padding: 60px; text-align: center; }
.cta-box h2 { color: var(--heading); font-size: 1.9rem; margin-bottom: 12px; }
.cta-box p { color: var(--text-muted); margin-bottom: 28px; }

/* ФУТЕР */
.footer { background: var(--bg2); border-top: 1px solid var(--border); padding: 60px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { margin-bottom: 12px; display: inline-flex; }
.footer-brand p { color: var(--text-muted); font-size: 14px; line-height: 1.7; max-width: 260px; }
.footer-col h4 { color: var(--heading); font-size: 14px; font-weight: 600; margin-bottom: 16px; text-transform: uppercase; letter-spacing: 1px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a, .footer-col p { color: var(--text-muted); font-size: 14px; transition: color .2s; }
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 24px; color: var(--text-muted); font-size: 13px; text-align: center; }

/* СТРАНИЦЫ — общие */
.page-hero { padding: 60px 0 40px; border-bottom: 1px solid var(--border); text-align: center; }
.page-hero h1 { font-size: 2.4rem; color: var(--heading); margin-bottom: 12px; }
.page-hero p { color: var(--text-muted); max-width: 580px; margin: 0 auto; }
.service-block { padding: 60px 0; border-bottom: 1px solid var(--border); }
.service-block:nth-child(even) { background: var(--bg2); }
.service-block .container { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.service-block.reverse .container { direction: rtl; }
.service-block.reverse .container > * { direction: ltr; }
.service-tag { font-size: 12px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--accent); margin-bottom: 12px; display: block; }
.service-block h2 { font-size: 1.7rem; color: var(--heading); margin-bottom: 16px; }
.service-block p { color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
.service-list { list-style: none; }
.service-list li { color: var(--text-muted); font-size: 14px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.service-list li::before { content: "✓ "; color: var(--accent2); font-weight: 700; }
.service-visual { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 32px; text-align: center; font-size: 72px; }
.team-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.team-card { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; padding: 28px; text-align: center; }
.team-avatar { width: 80px; height: 80px; border-radius: 50%; background: linear-gradient(135deg,var(--accent),var(--accent2)); display: flex; align-items: center; justify-content: center; font-size: 30px; margin: 0 auto 16px; }
.team-card h3 { color: var(--heading); margin-bottom: 4px; }
.team-card .role { color: var(--accent); font-size: 13px; margin-bottom: 12px; }
.team-card p { color: var(--text-muted); font-size: 13px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; color: var(--text-muted); font-weight: 500; }
.form-group input, .form-group textarea, .form-group select { background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 16px; color: var(--text); font-size: 14px; font-family: inherit; transition: border-color .2s; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--accent); }
.form-group textarea { min-height: 120px; resize: vertical; }
.btn-submit { padding: 14px; background: var(--accent); color: #0d1117; border: none; border-radius: var(--radius); font-weight: 700; font-size: 15px; cursor: pointer; transition: opacity .2s; }
.btn-submit:hover { opacity: .85; }
.contact-info h3 { color: var(--heading); margin-bottom: 20px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 20px; }
.contact-item .ci-icon { font-size: 20px; flex-shrink: 0; margin-top: 2px; }
.contact-item .ci-text p:first-child { color: var(--heading); font-weight: 600; margin-bottom: 2px; }
.contact-item .ci-text p:last-child { color: var(--text-muted); font-size: 14px; }
.map-placeholder { background: var(--bg2); border: 1px solid var(--border); border-radius: 12px; height: 200px; display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 14px; margin-top: 24px; }

/* АДАПТИВ */
@media (max-width: 900px) {
  .hero .container, .service-block .container, .contact-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2rem; }
  .cards-grid, .stats-grid, .team-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-visual { display: none; }
  .service-block.reverse .container { direction: ltr; }
}
@media (max-width: 600px) {
  .nav-list, .btn-cta { display: none; }
  .nav.open .nav-list { display: flex; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0; background: var(--bg2); border-bottom: 1px solid var(--border); padding: 16px; gap: 4px; }
  .burger { display: block; }
  .cards-grid, .stats-grid, .team-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.7rem; }
  .cta-box { padding: 32px 20px; }
}