/* Tropai © 2026 Alexandr. Основа программы: OpenCode, MIT, © 2025 opencode */

/* ---------------- цвета: тёмная тема по умолчанию ---------------- */
:root{
  --bg:#0a0c10; --bg-alt:#0f1318; --tile:#141920; --tile-hi:#1b212a; --line:#232a35;
  --text:#e9edf3; --muted:#98a2b3; --dim:#6b7686;
  --accent:#5eead4; --accent-hi:#2dd4bf; --on-accent:#06231f;
  --ok:#3ddc97; --soon:#f59e0b; --bad:#f87171;
  --top-bg:rgb(10 12 16 / .92); --shadow:0 14px 48px rgb(0 0 0 / .55);
  --radius:12px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI Variable","Segoe UI",Roboto,Arial,sans-serif;
  --mono:ui-monospace,"Cascadia Code",Consolas,monospace;
  color-scheme:dark;
}
@media (prefers-color-scheme:light){
  :root:not([data-theme="dark"]){
    --bg:#ffffff; --bg-alt:#f5f7fa; --tile:#ffffff; --tile-hi:#f1f4f8; --line:#dfe4ea;
    --text:#0f172a; --muted:#475569; --dim:#64748b;
    --accent:#0d9488; --accent-hi:#0f766e; --on-accent:#ffffff;
    --ok:#16a34a; --soon:#b45309; --bad:#dc2626;
    --top-bg:rgb(255 255 255 / .92); --shadow:0 14px 48px rgb(15 23 42 / .15);
    color-scheme:light;
  }
}
:root[data-theme="light"]{
  --bg:#ffffff; --bg-alt:#f5f7fa; --tile:#ffffff; --tile-hi:#f1f4f8; --line:#dfe4ea;
  --text:#0f172a; --muted:#475569; --dim:#64748b;
  --accent:#0d9488; --accent-hi:#0f766e; --on-accent:#ffffff;
  --ok:#16a34a; --soon:#b45309; --bad:#dc2626;
  --top-bg:rgb(255 255 255 / .92); --shadow:0 14px 48px rgb(15 23 42 / .15);
  color-scheme:light;
}

/* ---------------- база ---------------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto}
a{color:var(--accent)}
a:hover{color:var(--accent-hi)}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.wrap.narrow{max-width:820px}
.dim{color:var(--dim)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---------------- шапка ---------------- */
.top{position:sticky;top:0;z-index:30;background:var(--top-bg);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;
  font-size:1.12rem;letter-spacing:-.01em}
.logo:hover{color:var(--text)}
.logo img{border-radius:7px}
.nav{display:flex;gap:4px;align-items:center}
.nav a{padding:8px 13px;border-radius:7px;font-size:.9rem;color:var(--muted);text-decoration:none}
.nav a:hover{background:var(--tile-hi);color:var(--text)}
.nav a.on{color:var(--text);font-weight:600}
.nav .ghost{border:1px solid var(--line);margin-left:6px}
.theme{background:none;border:1px solid var(--line);color:var(--muted);border-radius:7px;
  width:36px;height:36px;display:grid;place-items:center;cursor:pointer;margin-left:4px}
.theme:hover{color:var(--text)}
.burger{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.burger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px}

/* ---------------- кнопки ---------------- */
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;background:var(--accent);color:var(--on-accent);font-weight:640;
  font-size:.95rem;padding:12px 26px;border-radius:8px;text-decoration:none;border:1px solid var(--accent)}
.btn:hover{background:var(--accent-hi);border-color:var(--accent-hi);color:var(--on-accent)}
.btn.alt{background:none;color:var(--text);border-color:var(--line);font-weight:500}
.btn.alt:hover{border-color:var(--accent);color:var(--accent)}

/* ---------------- главный экран ---------------- */
.hero{padding:88px 0 72px;text-align:center;
  background:radial-gradient(60% 55% at 50% 0%,rgb(94 234 212 / .13),transparent 70%)}
.hero.small{padding:64px 0 32px}
.kicker{margin:0 0 12px;color:var(--dim);font-size:.82rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.12em}
.hero h1{font-size:clamp(2.2rem,6vw,3.8rem);line-height:1.08;letter-spacing:-.035em;
  margin:0 auto 20px;font-weight:750;max-width:900px}
.lead{color:var(--muted);font-size:1.12rem;max-width:680px;margin:0 auto 32px}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;color:var(--muted);
  border:1px solid var(--line);border-radius:20px;padding:4px 14px;margin:24px 0 0}
.dot{width:7px;height:7px;border-radius:50%;background:var(--ok)}

/* ---------------- блоки ---------------- */
.block{padding:72px 0}
.block.alt{background:var(--bg-alt);border-block:1px solid var(--line)}
.h2{font-size:clamp(1.5rem,3.4vw,2.1rem);letter-spacing:-.025em;margin:0 0 8px;text-align:center}
.sub{color:var(--muted);text-align:center;margin:0 auto 40px;max-width:640px}
.fine{color:var(--dim);font-size:.86rem;margin:14px 0 0}

.cards{display:grid;gap:14px}
.cards.three{grid-template-columns:repeat(3,1fr)}
.cards.four{grid-template-columns:repeat(4,1fr)}
.card{background:var(--tile);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;display:flex;flex-direction:column;gap:8px}
.card h3{margin:0;font-size:1.1rem;letter-spacing:-.01em}
.card p{margin:0;color:var(--muted);font-size:.93rem}
.card .more{margin-top:auto;padding-top:10px;font-weight:600;font-size:.92rem;text-decoration:none}
.card .ico{font-size:1.4rem;width:44px;height:44px;border-radius:10px;display:grid;place-items:center;
  background:var(--tile-hi);color:var(--accent);margin-bottom:6px}
.state{align-self:flex-start;font-size:.74rem;font-weight:600;border-radius:20px;padding:2px 10px;margin:0 0 4px}
.state.ok{color:var(--ok);border:1px solid var(--ok)}
.state.soon{color:var(--soon);border:1px solid var(--soon)}

/* ---------------- схема «приложение → API → провайдеры» ---------------- */
.flow-svg{display:block;width:100%;height:auto;max-width:1000px;margin:0 auto}
.flow-lines path{fill:none;stroke:var(--accent);stroke-width:2;stroke-opacity:.45;
  stroke-dasharray:6 8;animation:flowrun 1.6s linear infinite}
.flow-lines path.own{stroke-width:2.5;stroke-opacity:.8}
@keyframes flowrun{to{stroke-dashoffset:-28}}
.flow-box rect{fill:var(--tile);stroke:var(--line);stroke-width:1.5}
.flow-box text{fill:var(--text);font:500 15px var(--sans)}
.flow-box.own rect{stroke:var(--accent);stroke-width:2}
.flow-box.own text{fill:var(--accent);font-weight:700}
.flow-hub rect{fill:var(--accent)}
.flow-hub .hub-title{fill:var(--on-accent);font:750 22px var(--sans)}
.flow-hub .hub-sub{fill:var(--on-accent);font:500 13px var(--sans);opacity:.85}
.flow-stack{display:none}
.flow-col{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.flow-h{width:100%;text-align:center;margin:0 0 4px;color:var(--dim);font-size:.8rem;
  text-transform:uppercase;letter-spacing:.05em}
.flow-logo{color:var(--text)}
.flow-box .flow-title{font:700 15px var(--sans);fill:var(--text)}
.flow-box .flow-sub{font:500 12.5px var(--sans);fill:var(--muted)}
.flow-chip small{color:var(--muted);font-size:.78rem}

/* куча логотипов программ слева — вразнобой, как оброненная горсть карточек */
.flow-card rect{fill:var(--tile);stroke:var(--line);stroke-width:1.5;
  filter:drop-shadow(0 2px 4px rgb(0 0 0 / .18))}
.flow-card:hover rect{stroke:var(--accent)}
.flow-pile-cap{fill:var(--dim);font:600 11px var(--sans);text-transform:uppercase;letter-spacing:.05em}
.flow-any{width:100%;text-align:center;margin:6px 0 0;color:var(--dim);font-size:.82rem;font-style:italic}
.flow-chip{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);background:var(--tile);
  border-radius:8px;padding:6px 12px;font-size:.9rem}
.flow-chip img{border-radius:4px}
/* чёрно-белые логотипы в столбиках (телефон): на тёмной теме — светлые */
.flow-chip img[src*="openai"],.flow-chip img[src*="anthropic"],.flow-chip img[src*="grok"]{filter:invert(1)}
@media (prefers-color-scheme:light){
  :root:not([data-theme="dark"]) .flow-chip img[src*="openai"],
  :root:not([data-theme="dark"]) .flow-chip img[src*="anthropic"],
  :root:not([data-theme="dark"]) .flow-chip img[src*="grok"]{filter:none}}
:root[data-theme="light"] .flow-chip img[src*="openai"],
:root[data-theme="light"] .flow-chip img[src*="anthropic"],
:root[data-theme="light"] .flow-chip img[src*="grok"]{filter:none}
.flow-chip.own{border-color:var(--accent);color:var(--accent);font-weight:700}
.flow-arrow{text-align:center;color:var(--accent);font-size:1.6rem;line-height:1;margin:10px 0}
.flow-hub-m{background:var(--accent);color:var(--on-accent);border-radius:14px;padding:16px;text-align:center}
.flow-hub-m b{display:block;font-size:1.2rem}
.flow-hub-m span{font-size:.85rem;opacity:.85}
@media (max-width:640px){.flow-svg{display:none}.flow-stack{display:block}}
@media (prefers-reduced-motion:reduce){.flow-lines path{animation:none}}

/* ---------------- установка ---------------- */
.tab-row{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:16px}
.tab-row button{background:none;border:none;border-bottom:2px solid transparent;color:var(--muted);
  font:inherit;font-size:.95rem;padding:10px 16px;cursor:pointer;margin-bottom:-1px}
.tab-row button[aria-selected="true"]{color:var(--text);border-bottom-color:var(--accent);font-weight:600}
.code{display:flex;align-items:center;gap:12px;background:#0b0e13;border:1px solid var(--line);
  border-radius:10px;padding:14px 14px 14px 18px}
.code code{flex:1;font-family:var(--mono);font-size:.9rem;color:#e6edf3;overflow-x:auto;white-space:nowrap}
.copy{flex:0 0 auto;background:var(--tile-hi);color:var(--text);border:1px solid var(--line);
  border-radius:7px;padding:7px 12px;font:inherit;font-size:.82rem;cursor:pointer}
.copy:hover{border-color:var(--accent)}
code.inline{font-family:var(--mono);font-size:.88em;background:var(--tile-hi);padding:1px 6px;border-radius:5px}
.notice{margin:18px 0 0;padding:12px 16px;border:1px solid var(--soon);border-radius:10px;
  color:var(--muted);font-size:.9rem;background:rgb(245 158 11 / .07)}

/* ---------------- модели ---------------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--tile)}
table.models{width:100%;border-collapse:collapse;font-size:.93rem;min-width:640px}
.models th,.models td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
.models th{color:var(--dim);font-weight:600;font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}
.models tr:last-child td{border-bottom:none}
.models .free{color:var(--ok);font-weight:700}

/* ---------------- тарифы ---------------- */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:14px;max-width:820px;margin:0 auto}
.plan{background:var(--tile);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;display:flex;flex-direction:column;gap:14px}
.plan.hot{border-color:var(--accent)}
.plan h3{margin:0;font-size:1.2rem}
.plan .btn{text-align:center}
.v-for{margin:0;color:var(--muted);font-size:.9rem}
.v-price{display:flex;align-items:baseline;gap:8px}
.v-price b{font-size:2rem;letter-spacing:-.03em}
.v-price span{color:var(--muted);font-size:.86rem}
.checks{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.checks li{position:relative;padding-left:26px;font-size:.92rem;color:var(--muted)}
.checks li::before{content:"";position:absolute;left:2px;top:.45em;width:11px;height:6px;
  border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg)}

/* ---------------- вопросы ---------------- */
details{border-bottom:1px solid var(--line);padding:4px 0}
summary{cursor:pointer;padding:16px 0;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--dim);font-size:1.3rem;line-height:1}
details[open] summary::after{content:"−"}
details p{margin:0 0 18px;color:var(--muted)}

/* ---------------- финал ---------------- */
.final{padding:88px 0;text-align:center}
.final h2{font-size:clamp(1.8rem,4.6vw,2.8rem);letter-spacing:-.03em;margin:0 0 10px}
.final p{color:var(--muted);margin:0 0 28px}

/* ---------------- документы ---------------- */
.legal{max-width:820px;padding-top:48px;padding-bottom:40px}
.legal h1{font-size:clamp(1.7rem,4vw,2.3rem);letter-spacing:-.025em;margin:6px 0 4px;line-height:1.2}
.legal h2{font-size:1.15rem;margin:34px 0 10px}
.legal p,.legal li{color:var(--muted)}
.legal ul{padding-left:22px}
.crumbs{font-size:.85rem;color:var(--dim);margin:0}
.crumbs a{color:var(--dim)}
mark.todo{background:rgb(245 158 11 / .2);color:var(--soon);padding:1px 6px;border-radius:4px;font-weight:600}
pre.license{background:var(--bg-alt);border:1px solid var(--line);border-radius:10px;padding:18px;
  font-family:var(--mono);font-size:.8rem;white-space:pre-wrap;color:var(--muted)}

/* ---------------- подвал ---------------- */
footer{border-top:1px solid var(--line);padding:48px 0 64px;background:var(--bg-alt)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1.3fr 1fr;gap:32px}
.foot-grid p{margin:0 0 8px;font-size:.88rem}
.foot-grid a{color:var(--muted);text-decoration:none}
.foot-grid a:hover{color:var(--text)}
.foot-h{color:var(--text);font-weight:600}
.foot-brand{display:flex;align-items:center;gap:8px}
.foot-brand img{border-radius:5px}

/* ---------------- чат ---------------- */
.chat-fab{position:fixed;right:22px;bottom:22px;z-index:60;width:56px;height:56px;border-radius:50%;
  background:var(--accent);color:var(--on-accent);border:none;cursor:pointer;display:grid;place-items:center;
  box-shadow:var(--shadow)}
.chat-fab:hover{background:var(--accent-hi)}
.chat-panel{position:fixed;right:22px;bottom:90px;z-index:61;width:min(370px,calc(100vw - 32px));
  background:var(--tile);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);overflow:hidden}
.chat-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;
  padding:15px 16px;border-bottom:1px solid var(--line)}
.chat-head b{display:block;font-size:.96rem}
.chat-head span{font-size:.78rem;color:var(--muted)}
.chat-x{background:none;border:none;color:var(--dim);font-size:1.5rem;line-height:1;cursor:pointer;padding:0 4px}
.chat-form{padding:15px 16px 16px;display:grid;gap:12px}
.chat-form label{display:block;font-size:.8rem;color:var(--muted)}
.chat-form input[type="text"],.chat-form textarea{width:100%;margin-top:5px;background:var(--bg);
  border:1px solid var(--line);border-radius:8px;padding:9px 11px;color:var(--text);font:inherit;font-size:.9rem;resize:vertical}
.chat-form input[type="text"]:focus,.chat-form textarea:focus{border-color:var(--accent);outline:none}
.chat-form .consent{display:flex;gap:8px;align-items:flex-start;font-size:.78rem;line-height:1.45}
.chat-form .consent input{margin-top:2px;accent-color:var(--accent)}
.chat-form .trap{position:absolute;left:-9999px;width:1px;height:1px}
.chat-send{width:100%;background:var(--accent);color:var(--on-accent);border:none;border-radius:8px;
  padding:11px;font:inherit;font-size:.92rem;font-weight:640;cursor:pointer}
.chat-send:disabled{opacity:.45;cursor:not-allowed}
.chat-note{margin:0;font-size:.82rem;min-height:1.1em}
.chat-note.good{color:var(--ok)}
.chat-note.bad{color:var(--bad)}

/* ---------------- телефон и планшет ---------------- */
@media (max-width:960px){
  .cards.four{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .wrap{padding:0 16px}
  .burger{display:flex}
  .nav{display:none;position:absolute;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:var(--bg);border-bottom:1px solid var(--line);padding:10px 16px 16px}
  .nav.open{display:flex}
  .nav .ghost{margin-left:0}
  .theme{margin:6px 0 0}
  .cards.three,.cards.four{grid-template-columns:1fr}
  .hero{padding:56px 0 48px}
  .block{padding:52px 0}
  .foot-grid{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}