/* konferancie.ru — лендинг агентства деловых мероприятий. Ванильный CSS, без сборки. */
:root{
  --ink:#0b0f16; --ink-2:#111825; --ink-3:#161f2e;
  --paper:#f5f6f8; --paper-2:#ffffff;
  --text:#e9edf3; --text-dark:#141a22; --muted:#93a0b4; --muted-dark:#5c6779;
  --gold:#fdbf00; --gold-2:#ffd451; --red:#d71200;
  --line:rgba(255,255,255,.10); --line-dark:rgba(12,18,28,.12);
  --wrap:1200px; --r:14px;
  --f: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--f);background:var(--ink);color:var(--text);
  font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
section{position:relative}
.sec{padding:84px 0}
.sec--light{background:var(--paper);color:var(--text-dark)}
.sec--light .muted{color:var(--muted-dark)}
.muted{color:var(--muted)}

/* ——— типографика ——— */
h1,h2,h3{margin:0 0 .5em;font-weight:750;letter-spacing:-.02em;line-height:1.12}
h1{font-size:clamp(30px,5.2vw,56px)}
h2{font-size:clamp(26px,3.6vw,42px)}
h3{font-size:clamp(18px,2vw,22px);letter-spacing:-.01em}
p{margin:0 0 1em}
.eyebrow{display:inline-flex;align-items:center;gap:9px;margin:0 0 18px;
  font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--gold);display:block}
.lead{font-size:clamp(17px,1.7vw,20px);color:var(--muted);max-width:62ch}
.sec--light .lead{color:var(--muted-dark)}
.sec-head{max-width:760px;margin-bottom:44px}

/* ——— кнопки ——— */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 26px;border-radius:10px;border:1px solid transparent;cursor:pointer;
  font:inherit;font-size:16px;font-weight:650;letter-spacing:.01em;
  transition:transform .15s ease, background .2s ease, box-shadow .2s ease;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn--gold{background:var(--gold);color:#10161f;box-shadow:0 8px 24px rgba(253,191,0,.22)}
.btn--gold:hover{background:var(--gold-2);box-shadow:0 12px 30px rgba(253,191,0,.3)}
.btn--ghost{background:transparent;color:var(--text);border-color:rgba(255,255,255,.28)}
.btn--ghost:hover{border-color:var(--gold);color:var(--gold)}
.sec--light .btn--ghost{color:var(--text-dark);border-color:rgba(12,18,28,.25)}
.sec--light .btn--ghost:hover{border-color:var(--text-dark)}
.btn--wide{width:100%}

/* ——— шапка ——— */
.hdr{position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(11,15,22,.72);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);transition:background .25s ease}
.hdr__in{display:flex;align-items:center;gap:22px;height:70px}
.logo{display:flex;align-items:center;gap:11px;margin-right:auto}
.logo__mark{width:38px;height:38px;flex:0 0 38px}
.logo__txt{display:flex;flex-direction:column;line-height:1.05}
.logo__name{font-weight:800;font-size:18px;letter-spacing:.01em}
.logo__sub{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.nav{display:flex;gap:24px;font-size:15px;color:#c6cfdc}
.nav a:hover{color:var(--gold)}
.hdr__tel{font-weight:700;font-size:17px;white-space:nowrap}
.hdr__tel:hover{color:var(--gold)}
.hdr__cta{padding:11px 20px;font-size:15px}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:none;cursor:pointer;align-items:center;justify-content:center}
.burger span{display:block;width:20px;height:2px;background:var(--text);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:20px;height:2px;background:var(--text)}
.burger span::before{top:-6px}.burger span::after{top:6px}

/* ——— герой ——— */
.hero{position:relative;min-height:min(96vh,860px);display:flex;align-items:flex-end;
  padding:150px 0 64px;overflow:hidden}
.hero__bg{position:absolute;inset:0;z-index:0}
.hero__bg img{width:100%;height:100%;object-fit:cover}
.hero__bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,15,22,.86) 0%,rgba(11,15,22,.62) 40%,rgba(11,15,22,.95) 100%)}
.hero__in{position:relative;z-index:1;display:grid;grid-template-columns:1.25fr .85fr;gap:52px;align-items:end;width:100%}
.hero h1{margin-bottom:20px;text-wrap:balance}
.hero h1 b{color:var(--gold);font-weight:750}
.hero__facts{list-style:none;margin:26px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.hero__facts li{font-size:14.5px;color:#d5dce6;border:1px solid var(--line);
  border-radius:999px;padding:8px 15px;background:rgba(255,255,255,.04)}
.quickform{background:rgba(17,24,37,.86);backdrop-filter:blur(10px);border:1px solid var(--line);
  border-radius:16px;padding:26px}
.quickform h3{margin-bottom:6px;font-size:20px}
.quickform p{font-size:14px;color:var(--muted);margin-bottom:16px}
.quickform .fine{margin:14px 0 0;font-size:12.5px;line-height:1.45;color:#7f8b9d}
.quickform .fine a{text-decoration:underline}

/* ——— поля ——— */
.f{display:block;width:100%;padding:14px 16px;font:inherit;font-size:16px;color:var(--text);
  background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:10px;margin-bottom:12px;
  transition:border-color .2s ease,background .2s ease}
.f::placeholder{color:#7b8a9c}
.f:focus{outline:none;border-color:var(--gold);background:rgba(255,255,255,.08)}
.f--err{border-color:var(--red)}
textarea.f{min-height:104px;resize:vertical}
select.f{appearance:none;background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2393a0b4' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;background-size:18px;padding-right:44px}
select.f option{background:#111825;color:#e9edf3}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.check{display:flex;gap:10px;align-items:flex-start;font-size:12.5px;line-height:1.45;color:#8b97a9;margin:4px 0 14px}
.check input{margin:2px 0 0;accent-color:var(--gold);width:16px;height:16px;flex:0 0 16px}
.check a{text-decoration:underline}

/* ——— цифры ——— */
.stats{background:var(--ink-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:44px 0}
.stats__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px}
.stat__n{font-size:clamp(30px,4vw,46px);font-weight:800;color:var(--gold);line-height:1;letter-spacing:-.03em}
.stat__t{margin-top:9px;font-size:14.5px;color:var(--muted);max-width:24ch}

/* ——— карточки форматов ——— */
.grid{display:grid;gap:20px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.card{position:relative;border-radius:var(--r);overflow:hidden;background:#0d131c;
  border:1px solid var(--line-dark);transition:transform .22s ease, box-shadow .22s ease}
.sec--light .card{box-shadow:0 2px 14px rgba(14,22,35,.06)}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(12,20,32,.18)}
.card__img{position:relative;aspect-ratio:9/6;overflow:hidden}
.card__img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .card__img img{transform:scale(1.05)}
.card__img::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,15,22,0) 30%,rgba(11,15,22,.86) 100%)}
.card__ttl{position:absolute;left:20px;right:20px;bottom:16px;z-index:2;
  color:#fff;font-weight:700;font-size:19px;letter-spacing:-.01em;line-height:1.2}
.card__body{padding:16px 20px 22px;background:var(--paper-2);color:var(--text-dark)}
.card__body p{margin:0;font-size:15px;line-height:1.55;color:var(--muted-dark)}

/* ——— кейсы (тёмные) ——— */
.sec--dark .card{background:var(--ink-2);border-color:var(--line)}
.sec--dark .card__body{background:var(--ink-2);color:var(--text)}
.sec--dark .card__body p{color:var(--muted)}
.case__tag{display:inline-block;margin-bottom:8px;font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--gold);font-weight:700}

/* ——— чек-лист «что входит» ——— */
.incl{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:var(--line-dark);
  border:1px solid var(--line-dark);border-radius:var(--r);overflow:hidden}
.incl li{list-style:none;background:var(--paper-2);padding:22px 22px;display:flex;gap:13px;align-items:flex-start}
.incl svg{flex:0 0 22px;width:22px;height:22px;color:var(--gold);margin-top:1px}
.incl b{display:block;font-size:16px;font-weight:650;color:var(--text-dark);margin-bottom:3px}
.incl span{font-size:14px;color:var(--muted-dark);line-height:1.5}

/* ——— шаги ——— */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(5,1fr);gap:18px;margin-top:8px}
.step{position:relative;padding:26px 20px 24px;border:1px solid var(--line-dark);border-radius:var(--r);background:var(--paper-2)}
.step::before{counter-increment:s;content:"0" counter(s);display:block;margin-bottom:12px;
  font-size:13px;font-weight:800;letter-spacing:.1em;color:var(--gold)}
.step b{display:block;font-size:17px;margin-bottom:7px;color:var(--text-dark)}
.step span{font-size:14.5px;color:var(--muted-dark);line-height:1.5}
.step em{display:block;margin-top:10px;font-style:normal;font-size:12.5px;letter-spacing:.06em;
  text-transform:uppercase;color:var(--muted-dark);opacity:.75}

/* ——— площадки ——— */
.venues{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.venue{position:relative;border-radius:var(--r);overflow:hidden;aspect-ratio:4/3}
.venue img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.venue:hover img{transform:scale(1.06)}
.venue::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,15,22,0) 40%,rgba(11,15,22,.85) 100%)}
.venue b{position:absolute;left:18px;right:18px;bottom:15px;z-index:2;color:#fff;font-size:17px;font-weight:650}

/* ——— полоса-призыв ——— */
.band{position:relative;padding:96px 0;overflow:hidden;text-align:center}
.band__bg{position:absolute;inset:0}
.band__bg img{width:100%;height:100%;object-fit:cover}
.band__bg::after{content:"";position:absolute;inset:0;background:rgba(9,13,20,.74)}
.band__in{position:relative;z-index:1;max-width:760px;margin:0 auto}
.band h2{margin-bottom:14px}
.band .lead{margin:0 auto 28px}
.band__btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ——— FAQ ——— */
.faq{max-width:900px}
.faq details{border-bottom:1px solid var(--line-dark);padding:4px 0}
.faq summary{list-style:none;cursor:pointer;padding:20px 44px 20px 0;position:relative;
  font-size:clamp(17px,2vw,19px);font-weight:650;color:var(--text-dark)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:8px;top:50%;width:12px;height:12px;
  border-right:2px solid var(--gold);border-bottom:2px solid var(--gold);
  transform:translateY(-70%) rotate(45deg);transition:transform .2s ease}
.faq details[open] summary::after{transform:translateY(-25%) rotate(-135deg)}
.faq p{margin:0 0 20px;color:var(--muted-dark);max-width:74ch}

/* ——— большая форма ——— */
.formsec{background:var(--ink-2)}
.formwrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.contacts{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:18px}
.contacts li{display:flex;gap:14px;align-items:flex-start}
.contacts svg{flex:0 0 20px;width:20px;height:20px;color:var(--gold);margin-top:3px}
.contacts b{display:block;font-size:19px;font-weight:700}
.contacts span{font-size:14.5px;color:var(--muted)}
.msg{margin-top:14px;padding:14px 16px;border-radius:10px;font-size:15px;display:none}
.msg--ok{display:block;background:rgba(253,191,0,.12);border:1px solid rgba(253,191,0,.4);color:var(--gold-2)}
.msg--err{display:block;background:rgba(215,18,0,.12);border:1px solid rgba(215,18,0,.45);color:#ff9c92}

/* ——— подвал ——— */
.ftr{background:var(--ink);border-top:1px solid var(--line);padding:52px 0 108px;font-size:14.5px;color:var(--muted)}
.ftr__in{display:flex;flex-wrap:wrap;gap:26px;justify-content:space-between;align-items:flex-start}
.ftr a:hover{color:var(--gold)}
.ftr__links{display:flex;gap:20px;flex-wrap:wrap}
.ftr__note{margin-top:26px;padding-top:22px;border-top:1px solid var(--line);font-size:12.5px;color:#6f7c8e;line-height:1.6}

/* ——— мобильная панель звонка ——— */
.mobbar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;gap:10px;padding:10px 14px;
  background:rgba(11,15,22,.94);backdrop-filter:blur(12px);border-top:1px solid var(--line)}
.mobbar .btn{flex:1;padding:13px 10px;font-size:15px}

/* ——— адаптив ——— */
@media (max-width:1024px){
  .hero__in{grid-template-columns:1fr;gap:34px;align-items:start}
  .quickform{max-width:520px}
  .grid--3,.venues,.incl{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .stats__grid{grid-template-columns:repeat(2,1fr);gap:22px}
  .formwrap{grid-template-columns:1fr;gap:36px}
  .nav{display:none}
}
@media (max-width:640px){
  body{font-size:16px}
  .sec{padding:56px 0}
  .hero{min-height:auto;padding:120px 0 44px}
  .grid--3,.grid--2,.venues,.incl,.steps,.stats__grid{grid-template-columns:1fr}
  .incl li{padding:18px}
  .hdr__tel,.hdr__cta{display:none}
  .burger{display:none}
  .mobbar{display:flex}
  .band{padding:64px 0}
  .form__row{grid-template-columns:1fr}
  .quickform{padding:20px}
  .ftr{padding-bottom:96px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}html{scroll-behavior:auto}}

/* ——— появление секций ——— */
.rise{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.rise.in{opacity:1;transform:none}

/* ——— сообщения проверки телефона (av-phone.js) ——— */
.av-phone-msg{margin:-6px 0 12px;font-size:13px;line-height:1.35;color:#ff9c92}
.av-phone-invalid{border-color:var(--red)!important}