/* ==========================================================================
   DFON — публичный сайт. Тёмная тема, палитра и типографика как в DFON CRM.
   ========================================================================== */

:root{
  --bg:#0a0e1a;
  --bg-soft:#0e1424;
  --surface:rgba(255,255,255,.05);
  --surface-2:rgba(255,255,255,.03);
  --border:rgba(255,255,255,.08);
  --border-strong:rgba(255,255,255,.14);
  --text:#e4e8f0;
  --text-secondary:#a0a8c0;
  --text-muted:#6b7280;
  --accent:#6C2AD2;
  --accent-hover:#7B3DE0;
  --accent-soft:rgba(108,42,210,.12);
  --cyan:#2FCDFF;
  --grad:linear-gradient(135deg,#6C2AD2,#2FCDFF);
  --green:#34d399;
  --red:#f87171;
  --shadow:0 20px 60px rgba(0,0,0,.4);
  --radius:20px;
  --radius-sm:12px;
  --maxw:1140px;
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
/* .f{display:flex} перебивает браузерное правило [hidden]{display:none} — возвращаем его */
[hidden]{display:none!important}
html{scroll-behavior:smooth;scroll-padding-top:84px;-webkit-text-size-adjust:100%}
body{
  font-family:'Manrope',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;position:relative;min-height:100vh;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:rgba(108,42,210,.4)}

/* ---------- фоновые пятна ---------- */
.orbs{position:fixed;inset:0;overflow:hidden;pointer-events:none;z-index:0}
.orbs i{position:absolute;border-radius:50%;filter:blur(90px);display:block}
.orbs i:nth-child(1){width:560px;height:560px;background:rgba(108,42,210,.16);top:-14%;left:-10%;animation:float1 20s ease-in-out infinite}
.orbs i:nth-child(2){width:440px;height:440px;background:rgba(47,205,255,.10);top:38%;right:-12%;animation:float2 26s ease-in-out infinite}
.orbs i:nth-child(3){width:380px;height:380px;background:rgba(108,42,210,.09);bottom:-10%;left:30%;animation:float3 22s ease-in-out infinite}
@keyframes float1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(50px,70px) scale(1.06)}}
@keyframes float2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-60px,-40px) scale(.94)}}
@keyframes float3{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(40px,-50px) scale(1.08)}}
@media (prefers-reduced-motion:reduce){
  .orbs i{animation:none}
  html{scroll-behavior:auto}
  .reveal{opacity:1!important;transform:none!important}
}

/* ---------- каркас ---------- */
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;position:relative;z-index:1}
section{position:relative;z-index:1;padding:96px 0}
section+section{padding-top:0}
.sec-head{max-width:660px;margin:0 0 44px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--cyan);margin-bottom:14px;
}
h1,h2,h3{letter-spacing:-.02em;line-height:1.18;font-weight:700}
h2{font-size:clamp(28px,4vw,40px)}
h3{font-size:19px}
.lead{color:var(--text-secondary);font-size:17px;margin-top:14px}

/* ---------- шапка ---------- */
.hdr{
  position:sticky;top:0;z-index:50;
  background:rgba(10,14,26,.72);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid transparent;transition:border-color .3s ease,background .3s ease;
}
.hdr.stuck{border-bottom-color:var(--border)}
.hdr-in{display:flex;align-items:center;gap:28px;height:70px}
.logo{display:flex;align-items:center;gap:11px;font-weight:700;font-size:18px;letter-spacing:-.02em;flex-shrink:0}
.logo-mark{
  width:36px;height:36px;border-radius:11px;background:var(--grad);
  display:grid;place-items:center;font-family:'JetBrains Mono',monospace;font-size:13px;color:#fff;
  box-shadow:0 4px 18px rgba(108,42,210,.35);
}
.nav{display:flex;gap:26px;margin-left:auto;font-size:14px;font-weight:500}
.nav a{color:var(--text-secondary);transition:color .2s ease}
.nav a:hover{color:var(--text)}
.nav .nav-extra{display:none}   /* «Оплатить» и «Подключить» переезжают в бургер-меню на узких экранах */
.hdr-cta{display:flex;gap:10px;align-items:center;flex-shrink:0}
.burger{display:none;width:40px;height:40px;border:1px solid var(--border);border-radius:10px;
  background:var(--surface);color:var(--text);align-items:center;justify-content:center;cursor:pointer}

/* ---------- кнопки ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:12px;border:1px solid transparent;
  font-family:inherit;font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .2s ease,box-shadow .3s ease,background .25s ease,border-color .25s ease,filter .25s ease;
}
.btn .material-icons-round{font-size:19px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 4px 18px rgba(108,42,210,.28)}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);box-shadow:0 8px 30px rgba(108,42,210,.42)}
.btn-ghost{background:var(--surface);border-color:var(--border);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.09);border-color:var(--border-strong)}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-lg{padding:15px 30px;font-size:16px}
.btn:active{transform:translateY(0) scale(.985)}
.btn[disabled]{opacity:.6;pointer-events:none}

/* ---------- карточки ---------- */
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:28px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:border-color .3s ease,background .3s ease,transform .3s ease;
}
.card:hover{border-color:var(--border-strong);background:rgba(255,255,255,.07)}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}

/* ---------- герой ---------- */
.hero{padding:88px 0 96px}
.hero-in{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(34px,5.4vw,56px);margin-bottom:20px}
.hero h1 .gr{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.lead{font-size:18px;max-width:520px}
.hero-btns{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap}
.badge-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}
.badge{
  display:inline-flex;align-items:center;gap:7px;padding:7px 14px;border-radius:999px;
  background:var(--accent-soft);border:1px solid rgba(108,42,210,.25);
  font-size:13px;font-weight:600;color:#c9b6f0;
}
.badge .material-icons-round{font-size:15px}
.hero-stats{display:flex;gap:34px;margin-top:40px;flex-wrap:wrap}
.hero-stats div span{display:block;font-size:28px;font-weight:700;font-family:'JetBrains Mono',monospace;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-stats div small{color:var(--text-muted);font-size:13px;font-weight:500}

/* ---------- фотографии ---------- */
/* Телефон в герое: свечение под картинкой, чтобы вырезанный PNG не «висел» в пустоте. */
.hero-art{position:relative;display:flex;justify-content:center}
.hero-art::before{
  content:'';position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);
  width:420px;height:420px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(108,42,210,.32),rgba(47,205,255,.10) 45%,transparent 70%);
  filter:blur(30px);
}
.hero-art img{position:relative;width:100%;max-width:400px;height:auto}

/* Снимок панели в блоке «Возможности» */
.shot{
  margin-top:32px;width:100%;max-width:300px;height:auto;border-radius:var(--radius);
  border:1px solid var(--border);box-shadow:var(--shadow);
}

/* Полоса с фотографией подъезда — растворяется в фоне сверху и снизу */
.photo-band{position:relative;z-index:1;overflow:hidden;line-height:0}
.photo-band img{width:100%;height:clamp(200px,26vw,320px);object-fit:cover;opacity:.85}
.photo-band::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(to bottom,var(--bg),transparent 28%,transparent 72%,var(--bg));
}

/* Блок приложения */
.app-band{display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center;padding:40px}
.app-band .app-shot{width:100%;max-width:280px;height:auto;margin:0 auto;filter:drop-shadow(0 24px 50px rgba(0,0,0,.5))}
.badges{display:flex;gap:12px;flex-wrap:wrap}
.badges img{height:48px;width:auto;border-radius:9px;transition:transform .2s ease,box-shadow .3s ease}
.badges a:hover img{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.45)}

/* Заголовок секции с картинкой сбоку */
.sec-head.with-art{
  display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;max-width:none;
}
.sec-head.with-art > div{max-width:660px}
.sec-head.with-art img{width:100%;max-width:190px;height:auto;
  filter:drop-shadow(0 18px 36px rgba(0,0,0,.5))}

/* ---------- преимущества / функции ---------- */
.feat .material-icons-round{
  width:46px;height:46px;border-radius:13px;background:var(--accent-soft);
  border:1px solid rgba(108,42,210,.22);color:#b491ee;
  display:grid;place-items:center;font-size:23px;margin-bottom:16px;
}
.feat h3{margin-bottom:8px}
.feat p{color:var(--text-secondary);font-size:14.5px}

.fn-list{display:grid;gap:2px}
.fn{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--border)}
.fn:last-child{border-bottom:0}
.fn .material-icons-round{color:var(--cyan);font-size:22px;flex-shrink:0;margin-top:2px}
.fn b{display:block;font-size:15.5px;margin-bottom:3px}
.fn span{color:var(--text-secondary);font-size:14.5px}

/* ---------- тарифы ---------- */
.tariff{display:flex;flex-direction:column;position:relative;overflow:hidden}
.tariff.main{border-color:rgba(108,42,210,.45);background:rgba(108,42,210,.07)}
.tariff.main::before{content:'';position:absolute;inset:0 0 auto;height:2px;background:var(--grad)}
.tariff .tag{position:absolute;top:20px;right:20px;font-size:11px;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:var(--cyan);background:rgba(47,205,255,.1);
  border:1px solid rgba(47,205,255,.25);padding:4px 10px;border-radius:999px}
.tariff h3{font-size:17px;color:var(--text-secondary);font-weight:600;margin-bottom:14px}
.price{display:flex;align-items:baseline;gap:6px;margin-bottom:6px}
.price b{font-size:42px;font-weight:700;font-family:'JetBrains Mono',monospace;letter-spacing:-.03em}
.price i{font-style:normal;font-size:15px;color:var(--text-muted);font-weight:600}
.tariff .note{color:var(--text-muted);font-size:13.5px;margin-bottom:22px}
.tariff ul{list-style:none;display:grid;gap:11px;margin-bottom:26px;flex:1}
.tariff li{display:flex;gap:10px;font-size:14.5px;color:var(--text-secondary)}
.tariff li .material-icons-round{font-size:18px;color:var(--green);flex-shrink:0;margin-top:2px}
.pay-note{
  margin-top:22px;display:flex;gap:12px;align-items:flex-start;
  padding:16px 18px;border-radius:var(--radius-sm);background:var(--surface-2);border:1px solid var(--border);
  color:var(--text-secondary);font-size:14px;
}
.pay-note .material-icons-round{color:var(--cyan);font-size:20px;flex-shrink:0}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--border)}
.faq details{border-bottom:1px solid var(--border)}
.faq summary{
  list-style:none;cursor:pointer;padding:20px 44px 20px 0;position:relative;
  font-weight:600;font-size:16px;transition:color .2s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{color:var(--cyan)}
.faq summary::after{
  content:'add';font-family:'Material Icons Round';position:absolute;right:8px;top:19px;
  font-size:22px;color:var(--text-muted);font-weight:400;transition:transform .25s ease,color .2s ease;
}
.faq details[open] summary::after{content:'remove';color:var(--cyan)}
.faq .ans{padding:0 44px 22px 0;color:var(--text-secondary);font-size:15px}
.faq .ans p+p{margin-top:10px}

/* ---------- формы ---------- */
.form-card{padding:32px}
/* align-items:start — иначе ячейка растягивается по соседней (например, с подсказкой),
   и стрелка .f-sel::after, привязанная к низу, уезжает под селект */
.fields{display:grid;gap:16px;grid-template-columns:repeat(2,1fr);align-items:start}
.f{display:flex;flex-direction:column;gap:7px}
.f.full{grid-column:1/-1}
.f label{font-size:13px;font-weight:600;color:var(--text-secondary)}
.f label .req{color:var(--accent);margin-left:2px}
.f input,.f select,.f textarea{
  width:100%;padding:12px 15px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);
  color:var(--text);font-family:inherit;font-size:15px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.f textarea{resize:vertical;min-height:96px}
.f select{appearance:none;cursor:pointer;padding-right:40px}
.f select option{background:#131a2b;color:var(--text)}
.f input:focus,.f select:focus,.f textarea:focus{
  border-color:rgba(108,42,210,.6);box-shadow:0 0 0 4px rgba(108,42,210,.14);background:rgba(255,255,255,.06)}
.f input::placeholder,.f textarea::placeholder{color:var(--text-muted)}
.f .hint{font-size:12.5px;color:var(--text-muted)}
.f-sel{position:relative}
.f-sel::after{
  content:'expand_more';font-family:'Material Icons Round';position:absolute;right:12px;bottom:11px;
  font-size:20px;color:var(--text-muted);pointer-events:none;
}
.hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;opacity:0}

.form-foot{display:flex;align-items:center;gap:18px;margin-top:24px;flex-wrap:wrap}
.form-foot .agree{font-size:12.5px;color:var(--text-muted);max-width:420px}
.form-foot .agree a{color:var(--text-secondary);border-bottom:1px solid var(--border-strong)}
.total{
  display:flex;align-items:baseline;gap:8px;padding:14px 18px;border-radius:var(--radius-sm);
  background:var(--accent-soft);border:1px solid rgba(108,42,210,.25);margin-top:18px;
}
.total small{color:var(--text-secondary);font-size:13.5px;font-weight:600}
.total b{font-size:22px;font-family:'JetBrains Mono',monospace;margin-left:auto}

.alert{
  display:flex;gap:12px;align-items:flex-start;padding:16px 18px;border-radius:var(--radius-sm);
  font-size:14.5px;margin-bottom:22px;
}
.alert .material-icons-round{font-size:20px;flex-shrink:0}
.alert-ok{background:rgba(52,211,153,.08);border:1px solid rgba(52,211,153,.25);color:#a7f3d0}
.alert-ok .material-icons-round{color:var(--green)}
.alert-err{background:rgba(248,113,113,.08);border:1px solid rgba(248,113,113,.22);color:#fecaca}
.alert-err .material-icons-round{color:var(--red)}

/* ---------- контакты ---------- */
.contacts{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.contact{display:flex;gap:14px;align-items:center;padding:22px}
.contact .material-icons-round{
  width:44px;height:44px;border-radius:12px;background:var(--accent-soft);color:#b491ee;
  display:grid;place-items:center;font-size:21px;flex-shrink:0}
.contact small{display:block;color:var(--text-muted);font-size:12.5px;margin-bottom:2px}
.contact b{font-size:15.5px;font-weight:600;word-break:break-word}

/* ---------- футер ---------- */
.ftr{border-top:1px solid var(--border);padding:44px 0 36px;position:relative;z-index:1;margin-top:40px}
.ftr-in{display:flex;gap:28px;justify-content:space-between;flex-wrap:wrap;align-items:flex-start}
.ftr-links{display:flex;gap:22px;flex-wrap:wrap;font-size:14px}
.ftr-links a{color:var(--text-secondary);transition:color .2s ease}
.ftr-links a:hover{color:var(--text)}
.ftr .copy{color:var(--text-muted);font-size:13px;margin-top:14px;max-width:460px}

/* ---------- правовые страницы ---------- */
.doc{max-width:820px;margin:0 auto;padding:56px 0 24px}
.doc h1{font-size:clamp(26px,4vw,36px);margin-bottom:10px}
.doc .meta{color:var(--text-muted);font-size:14px;margin-bottom:38px}
.doc h2{font-size:20px;margin:38px 0 14px;letter-spacing:-.01em}
.doc h3{font-size:16px;margin:24px 0 10px;color:var(--text-secondary)}
.doc p,.doc li{color:var(--text-secondary);font-size:15.5px}
.doc p{margin-bottom:12px}
.doc ul,.doc ol{margin:0 0 14px 22px;display:grid;gap:8px}
.doc .req-box{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;margin-top:20px;font-size:15px;
}
.doc .req-box dl{display:grid;grid-template-columns:auto 1fr;gap:10px 20px}
.doc .req-box dt{color:var(--text-muted);font-size:14px}
.doc .req-box dd{color:var(--text);font-weight:500}
.doc .todo{color:var(--text-muted);font-style:italic}
.back{display:inline-flex;align-items:center;gap:6px;color:var(--text-secondary);font-size:14px;
  font-weight:600;margin-bottom:26px}
.back:hover{color:var(--cyan)}
.back .material-icons-round{font-size:18px}

/* ---------- появление при скролле ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s cubic-bezier(.22,1,.36,1),transform .6s cubic-bezier(.22,1,.36,1)}
.reveal.on{opacity:1;transform:none}

/* ---------- адаптив ---------- */
/* Ссылки в строку помещаются примерно до 1000px — дальше уходят в бургер-меню. */
@media (max-width:1100px){
  .nav{display:none}
  .nav.open{
    display:flex;flex-direction:column;position:absolute;top:70px;left:0;right:0;
    background:rgba(12,17,30,.98);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    border-bottom:1px solid var(--border);padding:18px 24px;gap:16px;margin:0;font-size:15px;
  }
  .nav .nav-extra{display:block;color:var(--cyan)}
  .burger{display:flex}
  .hdr-cta .btn-ghost{display:none}
}
@media (max-width:960px){
  .hero-in{grid-template-columns:1fr;gap:44px}
  .hero-art img{max-width:320px}
  .hero-art::before{width:320px;height:320px}
  .app-band{grid-template-columns:1fr;gap:28px;padding:32px}
  .app-band .app-shot{max-width:230px}
  .g3,.contacts{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:760px){
  section{padding:68px 0}
  .g2,.g3,.contacts,.fields{grid-template-columns:1fr}
  .form-card{padding:24px 20px}
  .hero-stats{gap:24px}
  .wrap{padding:0 18px}
  .hdr-in{gap:14px}
  .shot{max-width:240px}
  .sec-head.with-art{grid-template-columns:1fr;gap:20px}
  .sec-head.with-art img{max-width:150px;justify-self:start}
  .badges img{height:42px}
}
@media (max-width:400px){
  .hdr-cta .btn-primary{display:none}
  .logo span:last-child{display:none}
}