/* VitalSense — публичный сайт. Только системные шрифты и локальные ресурсы (никаких запросов к третьим серверам). */
:root {
  --p: #6C5CE7; --g1: #5B5CF0; --g2: #7A5AF8; --ok: #12B76A; --bad: #D92D20; --blue: #2E90FA;
  --t: #101828; --t2: #667085; --b: #EAECF0; --bg: #FFFFFF; --bg2: #F8FAFC; --card: #FFFFFF; --chip: #F2F4F7;
  --r: 16px; --sh: 0 1px 2px rgba(16,24,40,.04), 0 12px 32px rgba(16,24,40,.06);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --t: #F2F4F7; --t2: #98A2B3; --b: #263042; --bg: #0C111D; --bg2: #111827; --card: #161B26; --chip: #1F2633; --sh: 0 12px 32px rgba(0,0,0,.35); }
}
:root[data-theme="dark"] { --t: #F2F4F7; --t2: #98A2B3; --b: #263042; --bg: #0C111D; --bg2: #111827; --card: #161B26; --chip: #1F2633; }
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body.vs-site { margin: 0; background: var(--bg); color: var(--t); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: var(--p); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { letter-spacing: -.02em; line-height: 1.15; margin: 0; }
h2 { font-size: clamp(26px, 3.4vw, 38px); margin-bottom: 28px; }
h3 { font-size: 18px; margin-bottom: 8px; }
p { margin: 0 0 12px; }
.s-wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.s-narrow { max-width: 780px; margin-left: auto; margin-right: auto; }
.s-center { text-align: center; }
.s-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.s-note { color: var(--t2); font-size: 14px; }
.s-lead { font-size: clamp(17px, 1.6vw, 20px); color: var(--t2); max-width: 640px; }

/* buttons */
.s-btn { display: inline-flex; align-items: center; justify-content: center; height: 42px; padding: 0 18px; border-radius: 12px; border: 0; background: linear-gradient(135deg, var(--g1), var(--g2)); color: #fff; font: inherit; font-weight: 600; font-size: 15px; cursor: pointer; white-space: nowrap; }
.s-btn:hover { text-decoration: none; filter: brightness(1.06); }
.s-btn-lg { height: 52px; padding: 0 26px; font-size: 16px; border-radius: 14px; }
.s-btn-ghost { background: transparent; color: var(--t); box-shadow: inset 0 0 0 1px var(--b); }
.s-btn-white { background: #fff; color: var(--p); }
.s-link { color: var(--t); font-weight: 500; }

/* header */
.s-head { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--b); }
.s-head-in { display: flex; align-items: center; gap: 28px; height: 68px; }
.s-logo { font-size: 22px; font-weight: 500; color: var(--t); letter-spacing: -.02em; }
.s-logo b { color: var(--p); font-weight: 800; }
.s-logo:hover { text-decoration: none; }
.s-nav { display: flex; gap: 24px; font-size: 15px; }
.s-nav a { color: var(--t2); }
.s-head-cta { margin-left: auto; display: flex; gap: 16px; align-items: center; }

/* hero */
.s-hero { padding: 72px 0 80px; background: radial-gradient(1100px 500px at 85% -10%, color-mix(in srgb, var(--p) 16%, transparent), transparent 60%); }
.s-hero-in { display: grid; grid-template-columns: 1.25fr 1fr; gap: 56px; align-items: center; }
.s-kicker { display: inline-block; padding: 5px 12px; border-radius: 999px; background: color-mix(in srgb, var(--p) 12%, transparent); color: var(--p); font-size: 13px; font-weight: 600; margin-bottom: 20px; }
.s-hero h1 { font-size: clamp(34px, 4.6vw, 56px); margin-bottom: 20px; }
.s-hero h1 em { font-style: normal; background: linear-gradient(135deg, var(--g1), var(--g2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.s-hero .s-row { margin: 28px 0 14px; }

.s-demo { background: var(--card); border: 1px solid var(--b); border-radius: 20px; padding: 22px; box-shadow: var(--sh); }
.s-demo-label { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--t2); margin-bottom: 10px; }
.s-demo-q { font-weight: 600; font-size: 17px; margin-bottom: 14px; }
.s-demo-rows { list-style: none; margin: 0 0 16px; padding: 0; }
.s-demo-rows li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-top: 1px solid var(--b); font-size: 15px; }
.s-demo-rows b.hit { color: var(--ok); } .s-demo-rows b.miss { color: var(--bad); }
.s-demo-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.s-demo-kpis div { background: var(--bg2); border-radius: 12px; padding: 12px; }
.s-demo-kpis b { display: block; font-size: 24px; letter-spacing: -.02em; }
.s-demo-kpis span { font-size: 12px; color: var(--t2); line-height: 1.3; display: block; }

/* sections */
.s-sec { padding: 88px 0; }
.s-alt { background: var(--bg2); }
.s-grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.s-card { background: var(--card); border: 1px solid var(--b); border-radius: var(--r); padding: 24px; }
.s-card p { color: var(--t2); margin: 0; }
.s-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: s; }
.s-steps li { background: var(--card); border: 1px solid var(--b); border-radius: var(--r); padding: 24px; }
.s-steps p { color: var(--t2); margin: 0; font-size: 15px; }
.s-num { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 10px; background: linear-gradient(135deg, var(--g1), var(--g2)); color: #fff; font-weight: 700; margin-bottom: 14px; }
.s-sub-h { margin: 48px 0 16px; font-size: 20px; }
.s-engines { display: flex; flex-wrap: wrap; gap: 12px; }
.s-engines div { border: 1px solid var(--b); border-radius: 12px; padding: 12px 16px; background: var(--card); }
.s-engines b { display: block; } .s-engines span { color: var(--t2); font-size: 14px; }

/* free check */
.s-fc { display: flex; flex-direction: column; gap: 10px; }
.s-fc label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; font-weight: 500; }
.s-fc input { height: 42px; border: 1px solid var(--b); border-radius: 10px; padding: 0 12px; font: inherit; background: var(--bg); color: var(--t); }
.s-fc input:focus { outline: 2px solid color-mix(in srgb, var(--p) 40%, transparent); border-color: var(--p); }
.s-fc-q { border-top: 1px solid var(--b); padding: 10px 0 0; margin-top: 4px; font-size: 14px; }
.s-fc-q b.hit { color: var(--ok); } .s-fc-q b.miss { color: var(--bad); }
.s-fc-q .s-note { margin: 4px 0 0; font-size: 13px; }
.s-fc-sum { background: var(--bg2); border-radius: 12px; padding: 12px; margin-top: 8px; font-size: 14px; }
.s-spin { display: inline-block; width: 12px; height: 12px; border: 2px solid var(--b); border-top-color: var(--p); border-radius: 50%; animation: s-spin .8s linear infinite; vertical-align: -1px; margin-right: 6px; }
@keyframes s-spin { to { transform: rotate(360deg); } }
.s-grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.s-price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin: 28px 0 16px; }
.s-ptable { width: 100%; border-collapse: collapse; margin: 6px 0 12px; }
.s-ptable td { padding: 10px 0; border-bottom: 1px solid var(--b); }
.s-ptable tr:last-child td { border-bottom: 0; }
.s-ptable .r { text-align: right; }

/* pricing */
.s-plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 28px 0 20px; }
.s-plan { background: var(--card); border: 1px solid var(--b); border-radius: 20px; padding: 28px; display: flex; flex-direction: column; gap: 10px; }
.s-plan p { color: var(--t2); font-size: 15px; flex: 1; }
.s-plan-hl { border-color: var(--p); box-shadow: 0 0 0 3px color-mix(in srgb, var(--p) 18%, transparent), var(--sh); }
.s-plan-name { font-weight: 700; font-size: 18px; }
.s-plan-price { font-size: 40px; font-weight: 800; letter-spacing: -.03em; line-height: 1; }
.s-plan-price span { font-size: 15px; font-weight: 500; color: var(--t2); letter-spacing: 0; }
.s-plan-cr b { font-size: 18px; }

/* faq */
.s-faq { border-bottom: 1px solid var(--b); padding: 18px 0; }
.s-faq summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.s-faq summary::after { content: '+'; color: var(--p); font-size: 22px; line-height: 1; }
.s-faq[open] summary::after { content: '–'; }
.s-faq summary::-webkit-details-marker { display: none; }
.s-faq p { color: var(--t2); margin: 12px 0 0; }

.s-final { padding: 80px 0; background: linear-gradient(135deg, var(--g1), var(--g2)); color: #fff; }
.s-final h2 { margin-bottom: 12px; } .s-final p { opacity: .9; margin-bottom: 28px; font-size: 18px; }

/* auth */
.s-auth { min-height: calc(100vh - 68px - 200px); display: grid; place-items: center; padding: 56px 16px; background: var(--bg2); }
.s-auth-card { width: min(440px, 100%); background: var(--card); border: 1px solid var(--b); border-radius: 20px; padding: 32px; box-shadow: var(--sh); display: flex; flex-direction: column; gap: 16px; }
.s-auth-card h1 { font-size: 28px; }
.s-auth-card label { display: flex; flex-direction: column; gap: 6px; font-weight: 500; font-size: 14px; }
.s-auth-card input[type=email], .s-auth-card input[type=password] { height: 46px; border: 1px solid var(--b); border-radius: 12px; padding: 0 14px; font: inherit; background: var(--bg); color: var(--t); }
.s-auth-card input:focus { outline: 2px solid color-mix(in srgb, var(--p) 40%, transparent); border-color: var(--p); }
.s-hint { color: var(--t2); font-weight: 400; }
.s-check { flex-direction: row !important; align-items: flex-start; gap: 10px !important; font-weight: 400 !important; color: var(--t2); }
.s-check input { margin-top: 3px; width: 18px; height: 18px; flex: none; }
.s-error { background: color-mix(in srgb, var(--bad) 10%, transparent); color: var(--bad); border-radius: 10px; padding: 10px 14px; font-size: 14px; }
.s-hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* legal */
.s-legal { padding-top: 56px; padding-bottom: 72px; }
.s-legal h1 { font-size: 34px; margin-bottom: 8px; }
.s-legal h2 { font-size: 20px; margin: 32px 0 10px; }
.s-legal p, .s-legal li { color: var(--t); }
.s-legal ul { padding-left: 20px; }

/* footer */
.s-foot { border-top: 1px solid var(--b); padding: 40px 0; background: var(--bg); }
.s-foot-in { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 24px; }
.s-foot-in > div { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.s-foot-h { font-weight: 600; margin-bottom: 4px; }
.s-foot a { color: var(--t2); }

@media (max-width: 960px) {
  .s-hero-in { grid-template-columns: 1fr; gap: 40px; }
  .s-grid3, .s-plans, .s-price-grid { grid-template-columns: 1fr; }
  .s-grid4 { grid-template-columns: 1fr 1fr; }
  .s-steps { grid-template-columns: 1fr 1fr; }
  .s-nav { display: none; }
}
@media (max-width: 600px) {
  .s-wrap { padding: 0 16px; }
  .s-hero { padding: 40px 0 56px; }
  .s-sec { padding: 56px 0; }
  .s-steps, .s-grid4 { grid-template-columns: 1fr; }
  .s-head-cta .s-link { display: none; }
  .s-head-cta .s-btn { height: 38px; padding: 0 14px; font-size: 14px; }
  .s-foot-in { grid-template-columns: 1fr; }
  .s-btn-lg { width: 100%; }
  .s-auth-card { padding: 22px; }
}