/* Задачник · Синергиум — sinergium-app.ru */

:root{
  --ink:#0f1b2d;
  --ink-2:#3d4b60;
  --ink-3:#6b7a90;
  --line:#e4e9f2;
  --bg:#ffffff;
  --bg-soft:#f5f8fc;
  --bg-deep:#12203a;

  --blue:#3f6bff;
  --blue-d:#2a51d6;
  --teal:#12b39a;
  --violet:#7a5cf0;
  --amber:#e8963a;
  --green:#22a565;

  --r-s:10px;
  --r-m:16px;
  --r-l:24px;
  --shadow-s:0 2px 8px rgba(15,27,45,.06);
  --shadow-m:0 10px 30px rgba(15,27,45,.08);
  --shadow-l:0 26px 60px rgba(15,27,45,.14);
  --wrap:1180px;
  --font:"Inter","Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
h1,h2,h3{line-height:1.18;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2rem,4.6vw,3.35rem);font-weight:800}
h2{font-size:clamp(1.6rem,3vw,2.35rem);font-weight:750}
h3{font-size:1.14rem;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:820px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:12px 18px;z-index:200;border-radius:0 0 8px 0}
.skip:focus{left:0}

/* ---------- ШАПКА ---------- */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s;
}
.site-header.stuck{border-bottom-color:var(--line);box-shadow:0 4px 20px rgba(15,27,45,.05)}
.header-inner{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink);flex:none}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:1.06rem;font-weight:750;letter-spacing:-.02em}
.brand-text small{font-size:.72rem;color:var(--ink-3);letter-spacing:.01em}

.nav{display:flex;gap:26px;margin-left:auto}
.nav a{color:var(--ink-2);font-size:.94rem;font-weight:500;position:relative;padding:4px 0}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--blue);transform:scaleX(0);transition:transform .22s;border-radius:2px}
.nav a:hover{color:var(--ink)}
.nav a:hover::after{transform:scaleX(1)}

.header-actions{display:flex;gap:10px;margin-left:auto;flex:none}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--r-s);font-size:.94rem;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:.18s;white-space:nowrap;
  font-family:inherit;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(63,107,255,.28)}
.btn-primary:hover{background:var(--blue-d);transform:translateY(-1px);box-shadow:0 10px 24px rgba(63,107,255,.34)}
.btn-outline{border-color:var(--line);color:var(--ink);background:#fff}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn-ghost{color:var(--ink-2)}
.btn-ghost:hover{color:var(--blue);background:var(--bg-soft)}
.btn-lg{padding:15px 30px;font-size:1rem;border-radius:12px}
.btn-block{width:100%}

.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:10px;cursor:pointer;margin-left:auto}
.burger span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.22s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- ХИРО ---------- */
.hero{
  padding:78px 0 92px;
  background:
    radial-gradient(900px 460px at 88% -8%,rgba(18,179,154,.13),transparent 62%),
    radial-gradient(760px 420px at 6% 0%,rgba(63,107,255,.13),transparent 60%),
    linear-gradient(180deg,#fbfcff,#fff);
  overflow:hidden;
}
.hero-inner{display:grid;grid-template-columns:1.02fr .98fr;gap:56px;align-items:center}
.eyebrow{
  font-size:.78rem;font-weight:700;letter-spacing:.11em;text-transform:uppercase;
  color:var(--blue);margin:0 0 14px;
}
.lead{font-size:1.09rem;color:var(--ink-2);max-width:34em;margin-bottom:30px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:44px}
.hero-facts{display:flex;gap:38px;flex-wrap:wrap;padding-top:26px;border-top:1px solid var(--line)}
.hero-facts li{display:flex;flex-direction:column}
.hero-facts b{font-size:1.6rem;font-weight:750;letter-spacing:-.02em}
.hero-facts span{font-size:.85rem;color:var(--ink-3)}

/* доска */
.board{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-l);
  box-shadow:var(--shadow-l);overflow:hidden;transform:perspective(1400px) rotateY(-6deg) rotateX(2deg);
}
.board-top{display:flex;align-items:center;gap:7px;padding:13px 18px;border-bottom:1px solid var(--line);background:var(--bg-soft)}
.dot{width:10px;height:10px;border-radius:50%;background:#d8dfea}
.dot:first-child{background:#ff6058}.dot:nth-child(2){background:#ffbd2e}.dot:nth-child(3){background:#28c840}
.board-title{margin-left:10px;font-size:.78rem;color:var(--ink-3);font-weight:600}
.board-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;padding:16px}
.col-h{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--ink-3);margin:0 0 10px;display:flex;gap:6px;align-items:center}
.col-h i{font-style:normal;background:var(--bg-soft);border-radius:20px;padding:1px 7px;font-size:.7rem;color:var(--ink-2)}
.board .card{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 11px;margin-bottom:10px;
  box-shadow:var(--shadow-s);
}
.board .card p{font-size:.78rem;line-height:1.4;margin:7px 0 8px;color:var(--ink);font-weight:500}
.board .card footer{display:flex;align-items:center;gap:6px;font-size:.68rem;color:var(--ink-3)}
.board .card.ghost{opacity:.55;border-style:dashed;box-shadow:none}
.board .card.done{background:linear-gradient(180deg,#f3fbf7,#fff);border-color:#cceedd}
.tag{display:inline-block;font-size:.62rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;padding:2px 7px;border-radius:5px;background:var(--bg-soft);color:var(--ink-3)}
.tag-blue{background:#e8effe;color:#2a51d6}
.tag-teal{background:#e0f7f2;color:#0d8d79}
.tag-violet{background:#efeafe;color:#6244d6}
.tag-amber{background:#fdf0e0;color:#c4741f}
.tag-green{background:#e3f6ec;color:#1a8a53}
.ava{width:17px;height:17px;border-radius:50%;display:inline-block;flex:none}
.a1{background:linear-gradient(135deg,#3f6bff,#7a5cf0)}
.a2{background:linear-gradient(135deg,#12b39a,#3f6bff)}
.a3{background:linear-gradient(135deg,#e8963a,#e05b7a)}
.a4{background:linear-gradient(135deg,#22a565,#12b39a)}
.bar{height:4px;background:var(--bg-soft);border-radius:4px;margin-top:8px;overflow:hidden}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--blue),var(--teal));border-radius:4px}

/* ---------- СЕКЦИИ ---------- */
.section{padding:92px 0}
.section-tight{padding:76px 0}
.section-alt{background:var(--bg-soft);border-block:1px solid var(--line)}
.section-head{max-width:660px;margin:0 auto 52px;text-align:center}
.section-sub{color:var(--ink-2);font-size:1.03rem;margin:0}
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* было/стало */
.pains{grid-template-columns:1fr auto 1fr;align-items:center;gap:28px}
.pain{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:28px 30px}
.pain h3{color:var(--ink-3);font-size:.78rem;text-transform:uppercase;letter-spacing:.09em;margin-bottom:16px}
.pain li{position:relative;padding-left:26px;margin-bottom:11px;color:var(--ink-2);font-size:.97rem}
.pain li::before{content:"";position:absolute;left:6px;top:.62em;width:7px;height:7px;border-radius:50%;background:#c9d3e2}
.pain-arrow{border:0;background:none;color:var(--line);padding:0;display:flex;justify-content:center}
.pain-good{border-color:#cfe0ff;background:linear-gradient(180deg,#f7faff,#fff);box-shadow:var(--shadow-m)}
.pain-good h3{color:var(--blue)}
.pain-good li{color:var(--ink)}
.pain-good li::before{
  content:"";background:none;left:2px;top:.42em;width:14px;height:8px;border-radius:0;
  border-left:2.2px solid var(--teal);border-bottom:2.2px solid var(--teal);transform:rotate(-45deg);
}

/* возможности */
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:26px 24px;transition:.22s}
.section-alt .feature{box-shadow:var(--shadow-s)}
.feature:hover{transform:translateY(-3px);box-shadow:var(--shadow-m);border-color:#d6e0f2}
.feature p{margin:0;color:var(--ink-2);font-size:.94rem}
.ico{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;margin-bottom:16px}
.ico-blue{background:#e8effe;color:var(--blue)}
.ico-teal{background:#e0f7f2;color:#0d8d79}
.ico-violet{background:#efeafe;color:var(--violet)}
.ico-amber{background:#fdf0e0;color:#c4741f}
.ico-green{background:#e3f6ec;color:var(--green)}

/* шаги */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:s}
.step{position:relative;padding-top:30px}
.step::before{content:"";position:absolute;top:12px;left:0;right:-24px;height:2px;background:linear-gradient(90deg,var(--line),transparent)}
.step:last-child::before{right:0}
.step-n{
  display:inline-flex;align-items:center;justify-content:center;
  position:absolute;top:0;left:0;width:26px;height:26px;border-radius:50%;
  background:var(--blue);color:#fff;font-size:.68rem;font-weight:700;letter-spacing:.02em;
}
.step h3{margin-top:8px}
.step p{color:var(--ink-2);font-size:.95rem;margin:0}

/* роли */
.role{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:30px 28px}
.role-sub{color:var(--ink-3);font-size:.88rem;margin:-6px 0 20px}
.role-accent{background:var(--bg-deep);border-color:var(--bg-deep);color:#fff;box-shadow:var(--shadow-l)}
.role-accent .role-sub{color:#93a3bd}
.role-accent .ticks li{color:#dbe3ef}
.ticks li{position:relative;padding-left:28px;margin-bottom:12px;font-size:.96rem;color:var(--ink-2)}
.ticks li::before{
  content:"";position:absolute;left:4px;top:.36em;width:13px;height:7px;
  border-left:2.2px solid var(--teal);border-bottom:2.2px solid var(--teal);transform:rotate(-45deg);
}

/* интеграции */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split-copy .section-sub{margin-bottom:26px}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chips li{
  background:#fff;border:1px solid var(--line);border-radius:30px;padding:10px 18px;
  font-size:.92rem;color:var(--ink-2);box-shadow:var(--shadow-s);transition:.2s;
}
.chips li:hover{border-color:var(--blue);color:var(--blue);transform:translateY(-2px)}

/* цифры */
.band{background:var(--bg-deep);color:#fff;padding:64px 0}
.stats{gap:26px;text-align:center}
.stat b{display:block;font-size:2.5rem;font-weight:800;letter-spacing:-.03em;
  background:linear-gradient(120deg,#7fa3ff,#3ad9be);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:#93a3bd;font-size:.9rem}

/* тарифы */
.plans{align-items:stretch}
.plan{background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:32px 28px;display:flex;flex-direction:column;position:relative}
.plan .ticks{flex:1;margin-bottom:24px}
.price{font-size:1.5rem;font-weight:750;letter-spacing:-.02em;margin:0 0 22px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.price small{font-size:.86rem;font-weight:500;color:var(--ink-3);margin-left:3px}
.plan-best{border-color:var(--blue);box-shadow:var(--shadow-m)}
.badge{
  position:absolute;top:-12px;left:28px;background:var(--blue);color:#fff;
  font-size:.7rem;font-weight:700;padding:4px 12px;border-radius:20px;letter-spacing:.03em;
}
.note{text-align:center;color:var(--ink-3);font-size:.84rem;margin:26px 0 0}

/* FAQ */
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden}
.faq summary{
  padding:19px 52px 19px 22px;font-weight:600;cursor:pointer;position:relative;
  list-style:none;font-size:1rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"";position:absolute;right:24px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--ink-3);border-bottom:2px solid var(--ink-3);
  transform:translateY(-70%) rotate(45deg);transition:transform .22s;
}
.faq details[open] summary::after{transform:translateY(-25%) rotate(-135deg)}
.faq details[open] summary{color:var(--blue)}
.faq p{padding:0 22px 20px;margin:0;color:var(--ink-2);font-size:.96rem}

/* CTA */
.cta{padding-bottom:104px}
.cta-box{
  display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;
  background:
    radial-gradient(700px 340px at 92% 8%,rgba(18,179,154,.22),transparent 60%),
    linear-gradient(135deg,#16264260,#12203a),var(--bg-deep);
  color:#fff;border-radius:var(--r-l);padding:52px 56px;box-shadow:var(--shadow-l);
}
.cta-copy h2{margin-bottom:14px}
.cta-copy p{color:#a9b7cd;margin:0}
.form{background:#fff;border-radius:var(--r-m);padding:26px}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form label{display:block;margin-bottom:14px}
.form label>span{display:block;font-size:.82rem;color:var(--ink-2);font-weight:600;margin-bottom:6px}
.form label>span i{font-style:normal;color:var(--ink-3);font-weight:400}
.form input[type=text],.form textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  font-family:inherit;font-size:.95rem;color:var(--ink);background:#fdfdff;transition:.18s;resize:vertical;
}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(63,107,255,.14);background:#fff}
.form .check{display:flex;align-items:flex-start;gap:9px;margin-bottom:18px}
.form .check input{margin-top:3px;accent-color:var(--blue);width:16px;height:16px;flex:none}
.form .check span{font-size:.84rem;color:var(--ink-3);font-weight:400}
.form-status{margin:14px 0 0;font-size:.88rem;text-align:center;min-height:1.2em}
.form-status.ok{color:var(--green)}
.form-status.err{color:#d64545}

/* подвал */
.site-footer{background:var(--bg-deep);color:#93a3bd;padding:60px 0 26px;font-size:.92rem}
.footer-inner{display:grid;grid-template-columns:1.2fr 2fr;gap:48px;padding-bottom:40px}
.footer-brand b{color:#fff;font-size:1.14rem;font-weight:750;letter-spacing:-.02em}
.footer-brand p{margin:10px 0 0;line-height:1.6}
.footer-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.fh{color:#fff;font-weight:650;font-size:.88rem;margin:0 0 14px}
.footer-nav a,.ftxt{display:block;color:#93a3bd;margin-bottom:9px;transition:color .18s}
.footer-nav a:hover{color:#fff}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.09);padding-top:22px;font-size:.84rem;
}
.up{color:#93a3bd}
.up:hover{color:#fff}

/* появление */
/* прячем только если JS жив — иначе контент остался бы невидимым */
.reveal{transition:opacity .6s ease,transform .6s ease}
.js .reveal{opacity:0;transform:translateY(18px)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  .board{transform:none}
}

/* ---------- АДАПТИВ ---------- */
@media (max-width:1040px){
  .hero-inner,.split,.cta-box{grid-template-columns:1fr;gap:44px}
  .board{transform:none}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr);row-gap:34px}
  .step::before{right:-24px}
  .step:nth-child(2n)::before{right:0}
}
@media (max-width:880px){
  .nav{
    position:fixed;inset:72px 0 auto;flex-direction:column;gap:0;background:#fff;
    border-bottom:1px solid var(--line);padding:8px 24px 20px;box-shadow:var(--shadow-m);
    display:none;
  }
  .nav.open{display:flex}
  .nav a{padding:13px 0;border-bottom:1px solid var(--line);font-size:1rem}
  .nav a::after{display:none}
  .header-actions{display:none}
  .burger{display:flex}
  .pains{grid-template-columns:1fr}
  .pain-arrow{transform:rotate(90deg);margin:-6px auto}
  .grid-3{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr;gap:34px}
}
@media (max-width:640px){
  body{font-size:16px}
  .section{padding:64px 0}
  .hero{padding:52px 0 68px}
  .board-cols{grid-template-columns:1fr;gap:6px}
  .board-cols .col:nth-child(3){display:none}
  .grid-4,.stats{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr}
  .step::before{display:none}
  .hero-facts{gap:24px}
  .hero-facts li{flex:1 1 40%}
  .cta-box{padding:34px 22px}
  .form{padding:20px 18px}
  .form .row{grid-template-columns:1fr}
  .footer-nav{grid-template-columns:1fr 1fr}
  .btn-lg{padding:14px 22px}
  .hero-cta .btn{flex:1 1 100%}
}