/* ===== SmartWeb 3.0 — тёмная тема, системные шрифты ===== */
:root {
  --bg: #0a0a12;
  --bg-soft: #10101c;
  --surface: #14142260;
  --card: #16162a;
  --border: #2a2a44;
  --text: #eef0ff;
  --muted: #9aa0c0;
  --brand: #a78bfa;
  --brand-2: #6ee7ff;
  --accent: #22d3ee;
  --good: #34d399;
  --bad: #fb7185;
  --grad: linear-gradient(135deg, #6ee7ff 0%, #a78bfa 60%, #f472b6 100%);
  --radius: 18px;
  --shadow: 0 20px 60px -20px rgba(0,0,0,.6);
  --maxw: 1180px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(1200px 700px at 80% -10%, #1a1440 0%, transparent 60%),
              radial-gradient(900px 600px at -10% 20%, #0e2a3a 0%, transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.15; margin: 0; letter-spacing: -.02em; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ===== Кнопки ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 22px; border-radius: 999px; font-weight: 600; font-size: 15px;
  cursor: pointer; border: 1px solid transparent; transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--grad); color: #0a0a12; box-shadow: 0 10px 30px -10px rgba(167,139,250,.7); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--brand); }
.btn-tg { background: rgba(110,231,255,.08); border-color: rgba(110,231,255,.35); color: var(--brand-2); }
.btn-block { width: 100%; justify-content: center; }
.btn-lg { padding: 17px 30px; font-size: 17px; }

/* ===== Шапка ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(10,10,18,.72);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.logo { display: inline-flex; align-items: center; gap: 10px; }
.logo-mark { display: inline-flex; }
.logo-text { font-weight: 700; font-size: 20px; letter-spacing: -.01em; }
.logo-text b { color: var(--brand); }
.main-nav { display: flex; gap: 28px; margin-left: auto; }
.main-nav a { color: var(--muted); font-weight: 500; transition: color .2s; }
.main-nav a:hover { color: var(--text); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 42px; height: 42px; align-items: center; justify-content: center; background: transparent; border: 1px solid var(--border); border-radius: 12px; cursor: pointer; }
.nav-toggle span { width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: .25s var(--ease); }

/* ===== Hero ===== */
.hero { padding: clamp(40px, 6vw, 90px) 0 clamp(30px, 4vw, 60px); }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--brand-2); background: rgba(110,231,255,.08); border: 1px solid rgba(110,231,255,.25);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 20px;
}
.hero-title { font-size: clamp(34px, 5.2vw, 62px); font-weight: 800; }
.hero-sub { color: var(--muted); font-size: clamp(16px, 1.6vw, 19px); margin: 20px 0 28px; max-width: 42ch; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-facts { display: flex; gap: 30px; list-style: none; padding: 0; margin: 38px 0 0; flex-wrap: wrap; }
.hero-facts li { display: flex; flex-direction: column; }
.hero-facts b { font-size: 24px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-facts span { color: var(--muted); font-size: 13px; }

/* ===== Mind-map ===== */
.hero-map { margin: 0; }
.map-caption { text-align: center; font-weight: 700; font-size: clamp(15px, 1.8vw, 20px); margin-bottom: 6px; }
.map-wrap {
  border: 1px solid var(--border); border-radius: 24px;
  background: radial-gradient(600px 500px at 50% 45%, rgba(124,58,237,.14), transparent 70%), var(--bg-soft);
  box-shadow: var(--shadow); padding: 8px; overflow: hidden;
}
#mindmap { width: 100%; height: auto; display: block; }
.map-hint { text-align: center; color: var(--muted); font-size: 13px; margin: 10px 0 0; }

/* центр — ЕДИНСТВЕННАЯ бесконечная анимация: мягкая пульсация свечения */
.core-glow { transform-box: fill-box; transform-origin: center; animation: corePulse 3.4s ease-in-out infinite; }
@keyframes corePulse { 0%,100% { opacity: .5; transform: scale(.9);} 50% { opacity: 1; transform: scale(1.08);} }
.core-ring { } /* статический glow без анимации/фильтра */
.core-title { fill: #fff; font-weight: 800; font-size: 24px; letter-spacing: .02em; }
.core-roles { fill: var(--muted); font-size: 12px; }
.core-group { opacity: 0; }
.core-group.in { animation: fadeIn .6s .2s var(--ease) forwards; }

/* ветки */
.branch-path {
  fill: none; stroke-width: 7; stroke-linecap: round;
  stroke-dasharray: var(--len); stroke-dashoffset: var(--len);
  opacity: .95; transition: stroke-width .25s, filter .25s;
}
.mindmap.run .branch-path { animation: draw 1s var(--ease) forwards; animation-delay: var(--d); }
@keyframes draw { to { stroke-dashoffset: 0; } }
.branch-label { font-weight: 700; font-size: 16px; opacity: 0; }
.mindmap.run .branch-label { animation: fadeIn .5s var(--ease) forwards; animation-delay: calc(var(--d) + .5s); }

/* листья */
.leaf { opacity: 0; }
.mindmap.run .leaf { animation: fadeIn .45s var(--ease) forwards; animation-delay: var(--ld); }
.leaf-dot { }
.leaf-text { fill: var(--muted); font-size: 12.5px; font-weight: 500; }
.leaf-line { stroke-width: 2; opacity: .5; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(6px);} to { opacity: 1; transform: translateY(0);} }

/* hover-подсветка ветки */
.branch-group { cursor: default; }
.branch-group:hover .branch-path { stroke-width: 10; filter: drop-shadow(0 0 10px currentColor); }
.branch-group:hover .branch-label { fill: #fff; }
.branch-group:hover .leaf-text { fill: var(--text); }
.branch-group:hover .leaf-dot { filter: drop-shadow(0 0 6px currentColor); }

/* ===== Секции общие ===== */
.section { padding: clamp(56px, 8vw, 100px) 0; }
.section-title { font-size: clamp(26px, 3.4vw, 42px); font-weight: 800; text-align: center; }
.section-lead { text-align: center; color: var(--muted); max-width: 60ch; margin: 14px auto 46px; font-size: 17px; }

/* карточки 4 */
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* боли */
.pains { background: linear-gradient(180deg, transparent, rgba(20,20,34,.4), transparent); }
.pain-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: transform .3s var(--ease), border-color .3s; }
.pain-card:hover { transform: translateY(-6px); border-color: var(--brand); }
.pain-bad { color: var(--bad); font-weight: 700; font-size: 16px; margin-bottom: 12px; padding-left: 22px; position: relative; }
.pain-bad::before { content: "✕"; position: absolute; left: 0; top: 0; font-size: 14px; }
.pain-good { color: var(--text); padding-left: 22px; position: relative; }
.pain-good::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--good); font-weight: 800; }

/* услуги */
.service-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; transition: transform .3s var(--ease), border-color .3s, box-shadow .3s; }
.service-card:hover { transform: translateY(-6px); border-color: var(--brand-2); box-shadow: var(--shadow); }
.ico { width: 54px; height: 54px; display: grid; place-items: center; border-radius: 14px; color: var(--brand-2); background: rgba(110,231,255,.09); border: 1px solid rgba(110,231,255,.22); margin-bottom: 16px; }
.service-card h3 { font-size: 19px; margin-bottom: 8px; }
.service-card p { color: var(--muted); margin: 0; font-size: 15px; }

/* шаги */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; list-style: none; padding: 0; margin: 0; counter-reset: s; }
.step { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 24px; position: relative; overflow: hidden; }
.step-num { font-size: 40px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; display: block; margin-bottom: 8px; }
.step h3 { font-size: 18px; margin-bottom: 6px; }
.step p { color: var(--muted); margin: 0; font-size: 15px; }

/* тарифы */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: stretch; }
.plan { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; display: flex; flex-direction: column; position: relative; transition: transform .3s var(--ease); }
.plan:hover { transform: translateY(-6px); }
.plan-featured { border-color: var(--brand); box-shadow: 0 24px 70px -30px rgba(167,139,250,.6); background: linear-gradient(180deg, rgba(167,139,250,.1), var(--card)); }
.plan-badge { position: absolute; top: -12px; right: 24px; background: var(--grad); color: #0a0a12; font-weight: 700; font-size: 12px; padding: 5px 14px; border-radius: 999px; }
.plan-name { font-size: 20px; margin-bottom: 8px; }
.plan-price { font-size: 30px; font-weight: 800; margin-bottom: 4px; }
.plan-desc { color: var(--muted); font-size: 14px; margin: 0 0 18px; }
.plan-list { list-style: none; padding: 0; margin: 0 0 24px; display: grid; gap: 10px; flex: 1; }
.plan-list li { padding-left: 26px; position: relative; color: var(--text); font-size: 15px; }
.plan-list li::before { content: "✓"; position: absolute; left: 0; color: var(--good); font-weight: 800; }

/* CTA band */
.cta-band { text-align: center; }
.cta-inner { background: linear-gradient(135deg, rgba(110,231,255,.1), rgba(167,139,250,.14)); border: 1px solid var(--border); border-radius: 26px; padding: clamp(40px, 6vw, 70px) 24px; box-shadow: var(--shadow); }
.cta-inner h2 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; }
.cta-inner p { color: var(--muted); max-width: 50ch; margin: 14px auto 28px; font-size: 17px; }

/* Футер */
.site-footer { border-top: 1px solid var(--border); padding: 56px 0 30px; background: var(--bg-soft); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; }
.footer-note { color: var(--muted); margin: 10px 0 0; max-width: 34ch; }
.footer-col h4 { font-size: 15px; margin-bottom: 12px; color: var(--text); }
.footer-col a { display: block; color: var(--muted); margin-bottom: 8px; transition: color .2s; }
.footer-col a:hover { color: var(--brand-2); }
.footer-bottom { color: var(--muted); font-size: 14px; margin-top: 36px; padding-top: 22px; border-top: 1px solid var(--border); }

/* ===== Scroll-reveal ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ===== Адаптив ===== */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero-copy { text-align: center; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-cta, .hero-facts { justify-content: center; }
  .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .plans { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .plan-featured { order: -1; }
}
@media (max-width: 720px) {
  .main-nav {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; gap: 0; background: var(--bg-soft);
    border-bottom: 1px solid var(--border); padding: 0;
    max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); margin: 0;
  }
  .main-nav.open { max-height: 260px; }
  .main-nav a { padding: 16px 22px; border-top: 1px solid var(--border); }
  .nav-toggle { display: flex; }
  .btn-tg span:last-child { }
  .header-actions .btn-tg { padding: 10px 14px; font-size: 0; gap: 0; }
  .header-actions .btn-tg svg { margin: 0; }
  .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); }
}
@media (max-width: 520px) {
  .cards-4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero-facts { gap: 22px; }
  .core-title { font-size: 20px; }
  .leaf-text { font-size: 15px; }
  .branch-label { font-size: 19px; }
  .core-roles { font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
  .branch-path { stroke-dashoffset: 0 !important; }
  .branch-label, .leaf, .core-group { opacity: 1 !important; }
}