:root{
  --blue:#2B4C7E;
  --blue-deep:#1B3A5C;
  --ink:#1C2430;
  --muted:#6B7683;
  --line:#E2E7EE;
  --bg:#F7F8FA;
  --card:#FFFFFF;
  --gold:#B08D57;
}

*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:Optima,"Marcellus","Gill Sans","Gill Sans MT","Segoe UI",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  padding-bottom:86px;
}

/* шапка */
.topbar{
  position:sticky;top:0;z-index:20;
  background:rgba(247,248,250,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
  padding:calc(env(safe-area-inset-top) + 12px) 18px 12px;
}
.brand{
  font-size:13px;letter-spacing:.22em;color:var(--blue);
  text-align:center;cursor:pointer;user-select:none;
}

#main{padding:0 18px}
.screen{padding:22px 0 10px;animation:fade .22s ease}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ВХОД */
.hero{padding:26px 0 30px;text-align:center}
.hero-mark{
  font-size:38px;line-height:1.12;letter-spacing:.13em;
  color:var(--blue-deep);
}
.hero-sub{
  margin:18px auto 0;max-width:19em;
  color:var(--muted);font-size:16px;line-height:1.45;
}

.cards{display:flex;flex-direction:column;gap:12px}
.card{
  position:relative;display:block;width:100%;text-align:left;
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:20px 46px 20px 20px;font:inherit;color:inherit;cursor:pointer;
  transition:transform .12s ease, box-shadow .12s ease;
}
.card:active{transform:scale(.985)}
.card-primary{
  background:var(--blue-deep);border-color:var(--blue-deep);color:#fff;
  box-shadow:0 6px 22px rgba(27,58,92,.22);
}
.card-title{display:block;font-size:20px;line-height:1.25}
.card-note{display:block;margin-top:5px;font-size:14px;color:var(--muted)}
.card-primary .card-note{color:rgba(255,255,255,.72)}
.card-arrow{position:absolute;right:20px;top:50%;transform:translateY(-50%);opacity:.4;font-size:19px}

.footline{margin:26px 0 6px;text-align:center;font-size:13px;color:var(--muted)}

/* типографика */
.h1{font-size:29px;font-weight:400;color:var(--blue-deep);margin:6px 0 8px;letter-spacing:.01em}
.h2{font-size:14px;letter-spacing:.16em;text-transform:uppercase;color:var(--blue);margin:30px 0 12px;font-weight:400}
.lead{color:var(--muted);margin:0 0 22px;font-size:16px}

/* круг метода */
.circle-wrap{margin:6px 0 4px}
.circle{width:100%;height:auto;display:block}
.c-core{fill:#fff;font-size:15px;text-anchor:middle;font-family:inherit}
.c-lab{fill:var(--blue-deep);font-size:11.5px;text-anchor:middle;font-family:inherit}
.circle-note{text-align:center;color:var(--muted);font-size:14px;margin:2px 0 0}

.who{display:flex;flex-direction:column;gap:10px}
.who-item{
  background:var(--card);border:1px solid var(--line);border-radius:13px;padding:14px 16px;
}
.who-item b{display:block;font-weight:400;color:var(--blue-deep);font-size:17px}
.who-item span{display:block;color:var(--muted);font-size:14.5px;margin-top:3px}

/* двери */
.door{
  background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:20px;margin-bottom:16px;
}
.door-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}
.door-name{font-size:19px;font-weight:400;color:var(--blue-deep);margin:0}
.door-price{font-size:19px;color:var(--gold);white-space:nowrap}
.door-price-soft{font-size:15px;color:var(--muted)}
.steps{display:flex;flex-direction:column;gap:9px;margin:16px 0}
.step{display:flex;align-items:center;gap:11px;font-size:15.5px}
.step i{
  flex:0 0 24px;height:24px;border-radius:50%;background:#EEF2F7;color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-style:normal;font-size:13px;
}
.door-q{font-size:15.5px;color:var(--ink);margin:14px 0;line-height:1.45}
.door-note{font-size:14px;color:var(--muted);margin:0 0 16px}
.quote{text-align:center;color:var(--muted);font-size:14.5px;line-height:1.5;margin:24px 0 8px}

/* кнопки */
.btn{
  display:block;width:100%;text-align:center;text-decoration:none;
  background:var(--blue-deep);color:#fff;border:1px solid var(--blue-deep);
  border-radius:13px;padding:15px 18px;font:inherit;font-size:17px;cursor:pointer;
}
.btn:active{opacity:.85}
.btn-ghost{background:transparent;color:var(--blue-deep)}
.btn-wide{margin-top:6px}
.back{
  background:none;border:none;color:var(--blue);font:inherit;font-size:15px;
  padding:0 0 14px;cursor:pointer;
}

/* библиотека */
.shelf{margin-bottom:26px}
.shelf-name{font-size:14px;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin:0 0 11px}
.rail{display:flex;gap:12px;overflow-x:auto;padding-bottom:6px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.rail::-webkit-scrollbar{display:none}
.tile{
  flex:0 0 74%;scroll-snap-align:start;
  background:var(--card);border:1px solid var(--line);border-radius:15px;
  padding:16px;text-align:left;font:inherit;color:inherit;cursor:pointer;
}
.tile-cover{
  height:96px;border-radius:11px;margin:-4px -4px 12px;
  background:linear-gradient(135deg,#2B4C7E,#1B3A5C);
  display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.5);font-size:13px;
}
.tile-title{display:block;font-size:17px;line-height:1.3;color:var(--blue-deep)}
.tile-open{display:block;margin-top:8px;font-size:12.5px;color:var(--gold)}

/* тема */
.topic-cover{height:170px;border-radius:15px;background:linear-gradient(135deg,#2B4C7E,#1B3A5C);
  display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.55);font-size:14px;margin-bottom:18px}
.topic-parts{display:flex;flex-direction:column;gap:10px;margin:18px 0 24px}
.part{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);
  border-radius:13px;padding:14px 16px;font-size:16px;cursor:pointer}
.part span:first-child{font-size:18px;opacity:.6}

/* события */
.events{display:flex;flex-direction:column;gap:10px}
.ev{background:var(--card);border:1px solid var(--line);border-radius:13px;padding:14px 16px;
  display:flex;align-items:center;justify-content:space-between;gap:12px}
.ev-date{font-size:13px;color:var(--gold);letter-spacing:.06em}
.ev-title{font-size:16px;color:var(--blue-deep);margin-top:2px}
.ev-btn{flex:0 0 auto;background:#EEF2F7;border:none;border-radius:9px;padding:9px 15px;
  font:inherit;font-size:14px;color:var(--blue);cursor:pointer}

/* о Наталье */
.about{display:flex;gap:15px;align-items:flex-start}
.about-photo{
  flex:0 0 96px;height:120px;border-radius:13px;background:#E8ECF2;
  display:flex;align-items:center;justify-content:center;color:#A9B3BF;font-size:12px;
  background-size:cover;background-position:center;
}
.about-text p{margin:0 0 7px;font-size:15.5px}
.about-motto{color:var(--blue);font-size:16px !important}
.legal{margin:26px 0 6px;font-size:12px;color:#9AA3AE;text-align:center}

/* нижняя навигация */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:30;
  display:grid;grid-template-columns:repeat(4,1fr);
  background:rgba(255,255,255,.94);backdrop-filter:saturate(180%) blur(12px);
  border-top:1px solid var(--line);
  padding:8px 4px calc(env(safe-area-inset-bottom) + 8px);
}
.tab{
  background:none;border:none;font:inherit;font-size:11px;letter-spacing:.04em;
  color:var(--muted);display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:4px 2px;cursor:pointer;
}
.tab .ti{font-size:17px;line-height:1}
.tab.on{color:var(--blue-deep)}

@media (prefers-color-scheme: dark){
  :root{--bg:#F7F8FA}
}