/* ================================================================
   BUSINESS GIFTS PRESENTATION — design system v3
   Только чёрный + синий. Левая выключка. Реальные стрелки.
   Лого + название на каждом экране (закреплённая шапка).
   ================================================================ */

:root{
  --p-paper: #ffffff;
  --p-paper-tint: #f7f7f5;
  --p-ink:   #0a0a0a;
  --p-soft:  #6b6b6b;
  --p-faint: #b0b0b0;
  --p-muted: #767676; /* AA-контраст 4.5:1 на белом — для смыслового мелкого текста */
  --p-line:  #e9e9e9;
  --p-blue:  #004098;
  --p-blue-tint: #eef2fa;
  --p-font:  "Montserrat", -apple-system, sans-serif;
  --p-ease:  cubic-bezier(.16,.6,.28,1);
  --p-pad:   clamp(24px, 6vw, 64px);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--p-paper);color:var(--p-ink);font-family:var(--p-font)}

/* ---------- persistent header: логотип + название на каждом экране ---------- */
.pres-header{
  position:fixed;
  top:0;left:0;right:0;
  display:flex;
  align-items:center;
  gap:10px;
  padding:14px var(--p-pad);
  z-index:50;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(0,0,0,.06);
}
.pres-header img{width:32px;height:auto;cursor:pointer;transition:opacity .25s var(--p-ease)}
.pres-header a{display:flex;align-items:center;gap:10px;text-decoration:none}
.pres-header a:hover img{opacity:.6}
.pres-header span{
  font-family:var(--p-font);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--p-ink);
}

/* ---------- scroll container (обычная простая прокрутка, без трюков) ---------- */

.pres-screen{
  display:flex !important;
  flex-direction:column !important;
  justify-content:center !important;
  width:100% !important;
  max-width:none !important;
  min-height:100svh;
  box-sizing:border-box !important;
  padding:140px var(--p-pad) 80px;
  position:relative;
  float:none !important;
}
main.pres-scroller{display:block !important;width:100% !important;max-width:none !important}
.pres-screen-inner{width:100%;max-width:none;margin:0;flex-shrink:0}
.pres-screen.tint{background:var(--p-paper-tint)}
.pres-screen.tint-blue{background:var(--p-blue-tint)}
.pres-screen.is-dark{background:var(--p-ink);color:var(--p-paper)}
.pres-screen.is-dark .pres-body{color:rgba(255,255,255,.62)}
.pres-screen.is-dark .pres-eyebrow{color:rgba(255,255,255,.4)}
.pres-screen.is-dark .pres-line{color:#fff}

/* ---------- split layout: text + visual ---------- */
.pres-split{display:flex;flex-direction:column;gap:28px;width:100%}
@media (min-width:860px){
  .pres-split{flex-direction:row;gap:5vw;align-items:flex-start}
  .pres-split > *{flex:1 1 0;min-width:0;max-width:100%}
}
.pres-split-text{max-width:50ch}

/* ---------- reveal mechanics ---------- */
.pres-line{opacity:0;transform:translateY(12px);transition:opacity .7s var(--p-ease), transform .7s var(--p-ease)}
.is-active .pres-line{opacity:1;transform:translateY(0)}
.pres-line:nth-child(1){transition-delay:.05s}
.pres-line:nth-child(2){transition-delay:.4s}
.pres-line:nth-child(3){transition-delay:.75s}
.pres-line:nth-child(4){transition-delay:1.1s}

.pres-reveal{opacity:0;transform:translateY(10px);transition:opacity .6s var(--p-ease), transform .6s var(--p-ease)}
.is-active .pres-reveal{opacity:1;transform:translateY(0)}

.pres-stagger > *{opacity:0;transform:translateY(8px);transition:opacity .5s var(--p-ease), transform .5s var(--p-ease)}
.is-active .pres-stagger > *{opacity:1;transform:translateY(0)}
.pres-stagger > *:nth-child(1){transition-delay:.05s}
.pres-stagger > *:nth-child(2){transition-delay:.2s}
.pres-stagger > *:nth-child(3){transition-delay:.35s}
.pres-stagger > *:nth-child(4){transition-delay:.5s}
.pres-stagger > *:nth-child(5){transition-delay:.65s}
.pres-stagger > *:nth-child(6){transition-delay:.8s}
.pres-stagger > *:nth-child(7){transition-delay:.95s}
.pres-stagger > *:nth-child(8){transition-delay:1.1s}
.pres-stagger > *:nth-child(9){transition-delay:1.25s}

@media (prefers-reduced-motion: reduce){
  .pres-line,.pres-reveal,.pres-stagger > *{transition:opacity .3s linear;transform:none}
}

/* ---------- typography — всегда по левому краю ---------- */
.pres-h1{font-size:clamp(34px, 5.2vw, 68px);font-weight:700;line-height:1.08;letter-spacing:-.01em;margin:0;text-align:left;max-width:22ch}
.pres-h1 .accent{color:var(--p-blue)}
.pres-screen.is-dark .accent{color:#5b9bff}

.pres-h2{font-size:clamp(26px, 3.6vw, 44px);font-weight:700;line-height:1.12;letter-spacing:-.008em;margin:0;text-align:left;max-width:26ch}
.pres-h2 .accent{color:var(--p-blue)}

.pres-eyebrow{font-size:14px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--p-muted);margin:0 0 14px;text-align:left}

.pres-keyvisual{display:block;width:84px;height:84px;color:var(--p-blue);margin:0 0 24px}
.pres-keyvisual svg{width:100%;height:100%}
.pres-screen.is-dark .pres-keyvisual{color:#5b9bff}

.pres-body{font-family:"Inter",-apple-system,sans-serif;font-size:clamp(16px,1.6vw,19px);line-height:1.6;color:var(--p-soft);max-width:52ch;margin:18px 0 0;text-align:left}

.pres-num{font-size:clamp(32px,4.4vw,52px);font-weight:700;letter-spacing:-.02em;color:var(--p-blue);line-height:1;margin:0}
.pres-num-label{font-family:"Inter",-apple-system,sans-serif;font-size:15px;color:var(--p-soft);margin:6px 0 0}

/* ---------- stacked argument list ---------- */
.pres-arglist{margin:16px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:6px;width:100%}
.pres-arglist li{font-size:clamp(20px,1.8vw,21px);font-weight:600;color:var(--p-ink);padding:11px 0;border-top:1px solid var(--p-line);text-align:left}
.pres-arglist li:first-child{border-top:none;padding-top:0}
.pres-screen.is-dark .pres-arglist li{color:var(--p-paper);border-top-color:rgba(255,255,255,.14)}

/* ---------- stat row ---------- */
.pres-stat-row{display:flex;flex-wrap:wrap;gap:0;width:100%}
.pres-stat-card{padding:0 24px 0 0;margin-right:24px;border-right:1px solid var(--p-line)}
.pres-stat-card:last-child{border-right:none}

/* ---------- real visible arrow (заменяет текстовый ↓) ---------- */
.pres-arrow-down{
  width:16px;height:16px;
  align-self:flex-start;
  margin:3px 0 3px 12px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M8 1v11.5M3 9l5 5 5-5' stroke='%23004098' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round' fill='none'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:center;
  background-size:contain;
}
.pres-screen.is-dark .pres-arrow-down{
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M8 1v11.5M3 9l5 5 5-5' stroke='%235b9bff' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round' fill='none'/%3E%3C/svg%3E");
}

/* ---------- compact flow (умещается в один экран) ---------- */
.pres-flow{display:flex;flex-direction:column;width:100%;max-width:420px}
.pres-flow-step{
  padding:13px 20px;
  border:1px solid var(--p-line);
  font-size:16.5px;
  font-weight:600;
  color:var(--p-ink);
  background:var(--p-paper);
  transition:border-color .25s var(--p-ease), transform .25s var(--p-ease);
}
@media (hover:hover){
  .pres-flow-step:hover{border-color:var(--p-blue);transform:translateX(3px)}
}
.pres-flow-step.is-accent{border-color:var(--p-blue);color:var(--p-blue)}
.pres-screen.is-dark .pres-flow-step{background:transparent;color:#fff;border-color:rgba(255,255,255,.25)}

/* horizontal compact variant for tighter fit */
.pres-flow.is-horizontal{flex-direction:row;flex-wrap:wrap;max-width:none;gap:6px;align-items:center}
.pres-flow.is-horizontal .pres-flow-step{padding:12px 18px;font-size:15.5px}
.pres-flow.is-horizontal .pres-arrow-h{color:var(--p-blue);font-size:15px;font-weight:700}

/* ---------- tag cloud (годовой цикл, реальные ситуации) ---------- */
.pres-tagcloud{display:flex;flex-wrap:wrap;gap:8px;width:100%;margin-top:16px}
.pres-tag{
  padding:12px 18px;
  border:1px solid var(--p-line);
  font-family:"Inter",-apple-system,sans-serif;
  font-size:15.5px;
  color:var(--p-soft);
  transition:border-color .25s var(--p-ease), color .25s var(--p-ease);
}
@media (hover:hover){
  .pres-tag:hover{border-color:var(--p-blue);color:var(--p-ink)}
}
.pres-screen.is-dark .pres-tag{border-color:rgba(255,255,255,.22);color:rgba(255,255,255,.75)}

/* ---------- comparison columns ---------- */
.pres-compare{display:grid;grid-template-columns:repeat(auto-fit, minmax(180px, 1fr));gap:22px;width:100%;margin-top:10px}
.pres-compare-col{border-top:2px solid var(--p-line);padding-top:14px}
.pres-compare-col.is-bg{border-top-color:var(--p-blue)}
.pres-compare-label{font-size:17px;font-weight:700;letter-spacing:.01em;margin:0 0 14px;text-align:left;text-transform:uppercase}
.pres-compare-col.is-bg .pres-compare-label{color:var(--p-blue);font-size:19px}
.pres-compare-steps{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:1px}
.pres-compare-steps li{font-family:"Inter",-apple-system,sans-serif;font-size:17px;color:var(--p-soft);padding:8px 0 8px 18px;position:relative;border-bottom:1px solid var(--p-line);text-align:left}
.pres-compare-steps li:last-child{border-bottom:none}
.pres-compare-steps li::before{content:"";position:absolute;left:0;top:14px;width:9px;height:1px;background:var(--p-faint)}
.pres-compare-col.is-bg .pres-compare-steps li{color:var(--p-ink);font-weight:500}
.pres-compare-col.is-bg .pres-compare-steps li::before{background:var(--p-blue)}

/* ---------- quadrant grid ---------- */
.pres-quad{display:grid;grid-template-columns:repeat(auto-fit, minmax(160px, 1fr));gap:0;width:100%;margin-top:8px;overflow:hidden}
.pres-quad-item{background:var(--p-paper);padding:20px;min-width:0;border-right:1px solid var(--p-line);border-bottom:1px solid var(--p-line)}
.pres-screen.is-dark .pres-quad-item{background:var(--p-ink);border-color:rgba(255,255,255,.14)}
.pres-quad-item-label{font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--p-blue);margin:0 0 8px}
.pres-quad-item-text{font-size:clamp(17px,1.9vw,22px);font-weight:600;color:var(--p-ink);margin:0;line-height:1.3;text-align:left}
.pres-screen.is-dark .pres-quad-item-text{color:#fff}

/* ---------- directions grid ("что мы делаем") ---------- */
.pres-dir-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(210px, 1fr));gap:0;margin-top:20px;width:100%;overflow:hidden}
.pres-dir-item{background:var(--p-paper);padding:18px 20px;display:flex;align-items:center;gap:12px;transition:transform .25s var(--p-ease);min-width:0;border-right:1px solid var(--p-line);border-bottom:1px solid var(--p-line)}
.pres-dir-item > div{min-width:0}
@media (hover:hover){
  .pres-dir-item:hover{transform:translateX(4px)}
  .pres-dir-item:hover .pres-dir-icon{transform:scale(1.12)}
}
.pres-dir-icon{flex-shrink:0;width:26px;height:26px;color:var(--p-blue);transition:transform .25s var(--p-ease)}
.pres-dir-icon svg{width:100%;height:100%}
.pres-dir-name{font-size:14.5px;font-weight:700;color:var(--p-ink);margin:0}
.pres-dir-outcome{font-family:"Inter",-apple-system,sans-serif;font-size:12.5px;color:var(--p-muted);margin:2px 0 0}
.pres-dir-outcome .accent{color:var(--p-blue);font-weight:600}

/* ---------- case tiles ---------- */
.pres-case-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(160px, 1fr));gap:1px;background:var(--p-line);margin-top:20px;width:100%;overflow:hidden}
.pres-case-tile{background:var(--p-paper);padding:24px 18px;display:flex;align-items:center;justify-content:center;min-height:80px;transition:box-shadow .25s var(--p-ease)}
@media (hover:hover){
  .pres-case-tile:hover{box-shadow:inset 0 -3px 0 var(--p-blue)}
}
.pres-case-tile-name{font-size:20px;font-weight:700;color:var(--p-ink);text-align:center}

/* ---------- iceberg ---------- */
.pres-iceberg{width:100%;max-width:420px;position:relative;padding-top:92px}
.pres-iceberg-line{position:relative;height:1px;background:var(--p-ink);margin:0}
.pres-iceberg-tip{position:absolute;left:0;top:92px;transform:translateY(-100%);width:130px;padding:11px 10px;text-align:center;background:var(--p-blue);color:#fff;font-size:12px;font-weight:600}
.pres-iceberg-body{margin-top:1px;padding:20px 0 0;display:flex;flex-direction:column;gap:7px}
.pres-iceberg-body li{list-style:none;font-family:"Inter",-apple-system,sans-serif;font-size:15.5px;color:var(--p-soft);padding-left:16px;position:relative;text-align:left}
.pres-iceberg-body li::before{content:"";position:absolute;left:0;top:7px;width:5px;height:5px;border-radius:50%;background:var(--p-faint)}

/* ---------- battle cards ---------- */
.pres-battle{display:flex;flex-direction:column;width:100%}
.pres-battle-pair{padding:12px 0;border-bottom:1px solid var(--p-line)}
.pres-battle-pair:last-child{border-bottom:none}
.pres-battle-old{font-family:"Inter",-apple-system,sans-serif;font-size:15px;color:var(--p-muted);margin:0;text-align:left}
.pres-battle-new{font-family:var(--p-font);font-size:clamp(17px,1.9vw,21px);font-weight:700;color:var(--p-ink);margin:4px 0 0;text-align:left}
.pres-battle-new .accent{color:var(--p-blue)}
.pres-screen.is-dark .pres-battle-new{color:#fff}

/* ---------- many-to-one ---------- */
.pres-many-one{display:grid;grid-template-columns:1fr;gap:24px;width:100%;align-items:center}
@media (min-width:760px){.pres-many-one{grid-template-columns:1fr auto 1fr}}
.pres-many-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(110px, 1fr));gap:6px}
.pres-many-item{border:1px solid var(--p-line);padding:12px 16px;font-family:"Inter",-apple-system,sans-serif;font-size:15px;color:var(--p-soft);transition:border-color .25s var(--p-ease)}
@media (hover:hover){
  .pres-many-item:hover{border-color:var(--p-blue)}
}
.pres-many-arrow{text-align:center;color:var(--p-faint);font-size:18px}
.pres-one-box{border:2px solid var(--p-blue);padding:20px 18px;text-align:left}
.pres-one-box p{margin:0;font-weight:700;color:var(--p-blue);font-size:17px}
.pres-one-box p+p{margin-top:10px;font-weight:400;color:var(--p-soft);font-size:14.5px;font-family:"Inter",-apple-system,sans-serif}

/* ---------- dot navigation ---------- */
.pres-nav{position:fixed;right:16px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:4px;z-index:40}
.pres-nav-dot{
  width:16px;height:16px;
  display:flex;align-items:center;justify-content:center;
  background:transparent;border:none;padding:0;margin:0;
  cursor:pointer;
}
.pres-nav-dot::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--p-line);
  transition:background .3s var(--p-ease), transform .3s var(--p-ease);
}
.pres-nav-dot.is-current::before{background:var(--p-blue);transform:scale(1.5)}
@media (max-width:700px){.pres-nav{right:6px;gap:2px}.pres-nav-dot{width:14px;height:14px}.pres-nav-dot::before{width:5px;height:5px}}

/* ---------- focus visibility (клавиатурная навигация) ---------- */
.pres-nav-dot:focus-visible{outline:2px solid var(--p-blue);outline-offset:2px;border-radius:50%}
.pres-close:focus-visible,.pres-top:focus-visible{outline:2px solid #fff;outline-offset:3px;border-radius:4px}
.pres-exit:focus-visible,.pres-cta:focus-visible,.pres-header a:focus-visible{outline:2px solid var(--p-blue);outline-offset:3px}
.pres-screen.is-dark .pres-exit:focus-visible,.pres-screen.is-dark .pres-cta:focus-visible{outline-color:#5b9bff}

/* ---------- exit link (DNA) ---------- */
.pres-exit{position:fixed;bottom:20px;left:var(--p-pad);font-size:11.5px;font-weight:600;letter-spacing:.04em;color:var(--p-muted);text-decoration:none;z-index:40}
.pres-exit:hover{color:var(--p-ink)}

/* ---------- close (крест) — только презентация ---------- */
.pres-close{
  position:fixed;
  top:14px;right:20px;
  width:38px;height:38px;
  display:flex;align-items:center;justify-content:center;
  font-size:32px;
  line-height:1;
  color:#fff;
  text-decoration:none;
  font-weight:300;
  z-index:60;
  mix-blend-mode:difference;
  transition:opacity .25s var(--p-ease);
}
.pres-close:hover{opacity:.6}

/* ---------- back to top (стрелка вверх экрана) — только презентация, справа ---------- */
.pres-top{
  position:fixed;
  bottom:20px;right:20px;
  width:38px;height:38px;
  border-radius:50%;
  border:1px solid #fff;
  background:transparent;
  color:#fff;
  font-size:15px;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  z-index:60;
  mix-blend-mode:difference;
  transition:transform .25s var(--p-ease);
}
@media (hover:hover){
  .pres-top:hover{transform:translateY(-2px)}
}

/* ---------- contact / finale ---------- */
.pres-cta{display:inline-block;margin-top:24px;padding:15px 30px;background:var(--p-ink);color:var(--p-paper);text-decoration:none;font-size:14.5px;font-weight:600;letter-spacing:.02em;border-radius:2px;transition:opacity .25s var(--p-ease)}
@media (hover:hover){.pres-cta:hover{opacity:.8}}
.pres-screen.is-dark .pres-cta{background:var(--p-paper);color:var(--p-ink)}

/* ---------- фирменные геометрические паттерны-элементы ---------- */
.pres-orn{position:absolute;pointer-events:none;opacity:.6}
.pres-orn svg{display:block}
.pres-orn-corner{top:110px;right:var(--p-pad)}
@media (max-width:700px){.pres-orn-corner{display:none}}
.pres-dir-fill{
  background:var(--p-paper-tint);
  display:flex;
  align-items:center;
  justify-content:center;
  min-height:90px;
}
.pres-screen.tint .pres-dir-fill{background:var(--p-paper)}

/* ---------- вступительная заставка с лого (не загрузка, а приятный момент) ---------- */
.pres-intro{
  position:fixed;
  inset:0;
  background:var(--p-paper);
  display:flex;
  align-items:center;
  justify-content:center;
  z-index:100;
  opacity:1;
  animation:presIntroOut .5s var(--p-ease) 1.85s forwards;
  pointer-events:none;
}
.pres-intro img{
  width:56px;
  opacity:0;
  transform:scale(.6) rotate(0deg);
  animation:presIntroLogo 1.9s cubic-bezier(.45,0,.4,1) forwards;
}
@keyframes presIntroLogo{
  0%{opacity:0;transform:scale(.6) rotate(0deg)}
  22%{opacity:1}
  62%{opacity:1;transform:scale(1) rotate(-540deg)}
  100%{opacity:0;transform:scale(6.5) rotate(-720deg)}
}
@keyframes presIntroOut{
  to{opacity:0;visibility:hidden}
}
@media (prefers-reduced-motion: reduce){
  .pres-intro{display:none}
}