/* chutiye — short-video social web app. Original design; phone-first, works on desktop. */
:root{
  --bg:#0b0b0f; --bg-2:#131318; --bg-3:#1b1b22; --line:#2a2a33;
  --ink:#f5f5f7; --muted:#9a9aa6; --dim:#6c6c78;
  --accent:#ff2d6f; --accent-2:#7b2cff; --ok:#1fcf7a;
  --rail:72px; --maxfeed:480px;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --safe-b:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.5;
  -webkit-font-smoothing:antialiased;overscroll-behavior-y:none}
img,video,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:var(--ink);background:var(--bg-3);border:1px solid var(--line);
  border-radius:12px;padding:12px 14px;width:100%}
input:focus,textarea:focus{outline:2px solid var(--accent);outline-offset:1px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.hide{display:none!important}

/* ---------- shell ---------- */
.app{display:flex;height:100dvh;min-height:100dvh;overflow:hidden}
.rail{display:none;width:var(--rail);flex:none;border-right:1px solid var(--line);background:var(--bg);
  position:sticky;top:0;height:100dvh;flex-direction:column;align-items:center;padding:14px 0;gap:4px;z-index:30}
.rail .brandmark{margin-bottom:14px}
.rail button,.rail a.navbtn{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;color:var(--muted)}
.rail button:hover,.rail a.navbtn:hover{background:var(--bg-3);color:var(--ink)}
.rail .on{color:var(--ink);background:var(--bg-3)}
.rail .spacer{flex:1}
.main{flex:1;min-width:0;display:flex;flex-direction:column;min-height:0}

.topbar{position:sticky;top:0;z-index:25;display:flex;align-items:center;gap:12px;padding:10px 14px;
  background:linear-gradient(180deg,rgba(11,11,15,.96),rgba(11,11,15,.72) 70%,rgba(11,11,15,0));backdrop-filter:blur(8px)}
.topbar .t-title{font-weight:600;font-size:17px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topbar .iconbtn{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;color:var(--ink)}
.topbar .iconbtn:hover{background:var(--bg-3)}

.tabs{display:flex;gap:22px;justify-content:center;padding:4px 0 2px}
.tabs button{color:var(--muted);font-weight:600;font-size:15px;padding:6px 2px;position:relative}
.tabs button.on{color:var(--ink)}
.tabs button.on::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;background:var(--ink)}

.tabbar{position:sticky;bottom:0;z-index:30;display:flex;border-top:1px solid var(--line);background:rgba(11,11,15,.96);
  backdrop-filter:blur(10px);padding-bottom:var(--safe-b)}
.tabbar button{flex:1;padding:9px 0 7px;display:grid;place-items:center;gap:3px;color:var(--dim);font-size:10px;font-weight:600}
.tabbar button.on{color:var(--ink)}
.tabbar .mk{width:46px;height:30px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}

/* ---------- feed ---------- */
.feed{flex:1;min-height:0;overflow-y:auto;scroll-snap-type:y mandatory;overscroll-behavior-y:contain;scrollbar-width:none}
.feed::-webkit-scrollbar{display:none}
.slide{position:relative;height:100%;scroll-snap-align:start;scroll-snap-stop:always;display:grid;place-items:center;
  background:#000;overflow:hidden}
.slide .stage{position:relative;width:100%;height:100%;max-width:var(--maxfeed);margin:0 auto;background:#000;overflow:hidden}
.slide video,.slide .still{width:100%;height:100%;object-fit:cover;background:#000}
.slide .veil{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(0,0,0,.42) 0%,rgba(0,0,0,0) 22%,rgba(0,0,0,0) 54%,rgba(0,0,0,.72) 100%)}
.meta{position:absolute;left:0;right:76px;bottom:0;padding:0 16px 26px;z-index:3}
.meta .who{display:flex;align-items:center;gap:9px;margin-bottom:9px}
.meta .who .av{width:34px;height:34px;border-radius:50%;background:var(--bg-3);object-fit:cover;flex:none}
.meta .who b{font-size:15px}
.meta .follow{margin-left:4px;font-size:12px;font-weight:700;border:1px solid rgba(255,255,255,.55);
  padding:4px 11px;border-radius:999px}
.meta .follow.on{border-color:transparent;background:rgba(255,255,255,.18);color:var(--muted)}
.meta p{margin:0 0 8px;font-size:14.5px;line-height:1.45;max-height:4.4em;overflow:hidden}
.meta .tags{color:#fff;font-weight:600}
.meta .sound{display:flex;align-items:center;gap:7px;font-size:13px;color:#e7e7ee}
.meta .sound .ticker{overflow:hidden;white-space:nowrap;max-width:62vw}

.actions{position:absolute;right:8px;bottom:22px;z-index:4;display:grid;gap:16px;justify-items:center}
.actions .act{display:grid;justify-items:center;gap:4px;font-size:12px;font-weight:600;color:#fff;
  filter:drop-shadow(0 2px 8px rgba(0,0,0,.6))}
.actions .act .ic{width:34px;height:34px;display:grid;place-items:center}
.actions .act.on{color:var(--accent)}
.actions .ring{width:40px;height:40px;border-radius:50%;border:2px solid #fff;overflow:hidden;background:var(--bg-3)}
.actions .ring img{width:100%;height:100%;object-fit:cover}

.playpause{position:absolute;inset:0;z-index:2}
.bigplay{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:74px;height:74px;border-radius:50%;
  background:rgba(0,0,0,.42);display:grid;place-items:center;opacity:0;transition:opacity .18s;pointer-events:none;z-index:5}
.bigplay.show{opacity:1}
.progress{position:absolute;left:0;right:0;bottom:0;height:3px;background:rgba(255,255,255,.18);z-index:5}
.progress i{display:block;height:100%;width:0;background:#fff}

/* ---------- empty / launch state ---------- */
.empty{min-height:72dvh;display:grid;place-items:center;text-align:center;padding:40px 24px}
.empty .inner{max-width:420px}
.empty h2{font-size:26px;margin:18px 0 10px;font-weight:650;letter-spacing:-.02em}
.empty p{color:var(--muted);margin:0 0 20px}
.empty .mkbtn{display:inline-flex;align-items:center;gap:9px;padding:13px 22px;border-radius:999px;font-weight:700;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}

/* ---------- explore grid ---------- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;padding:0 0 18px}
.cell{position:relative;aspect-ratio:9/14;background:var(--bg-3);overflow:hidden}
.cell img,.cell video{width:100%;height:100%;object-fit:cover}
.cell .plays{position:absolute;left:7px;bottom:6px;font-size:12px;font-weight:700;display:flex;align-items:center;gap:4px;
  text-shadow:0 1px 6px rgba(0,0,0,.8)}
@media(min-width:720px){.grid{grid-template-columns:repeat(4,1fr);gap:4px;padding:0 14px 18px}}
@media(min-width:1100px){.grid{grid-template-columns:repeat(5,1fr)}}

/* ---------- profile ---------- */
.prof{padding:6px 16px 10px;max-width:760px;margin:0 auto;width:100%}
.prof .head{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center;padding:10px 0 14px}
.prof .av{width:94px;height:94px;border-radius:50%;background:var(--bg-3);object-fit:cover}
.prof h1{font-size:19px;margin:0;font-weight:650}
.prof .handle{color:var(--muted);font-size:14px}
.prof .stats{display:flex;gap:26px;margin:12px 0 6px}
.prof .stats div{text-align:center}
.prof .stats b{display:block;font-size:17px}
.prof .stats span{font-size:12.5px;color:var(--muted)}
.prof .bio{color:#d7d7e0;font-size:14px;max-width:34em}
.prof .pbtns{display:flex;gap:9px;margin-top:12px}
.btn{padding:10px 20px;border-radius:10px;font-weight:650;background:var(--bg-3);border:1px solid var(--line)}
.btn.primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));border-color:transparent;color:#fff}
.btn:hover{filter:brightness(1.12)}

/* ---------- sheets / modals ---------- */
.sheet{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-end;justify-content:center;
  background:rgba(0,0,0,.6);backdrop-filter:blur(2px)}
.sheet .panel{width:100%;max-width:560px;max-height:86dvh;background:var(--bg-2);border-radius:18px 18px 0 0;
  display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--line);border-bottom:0}
.sheet .ph{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--line)}
.sheet .ph b{flex:1;font-size:15px}
.sheet .pb{overflow-y:auto;padding:14px 16px;flex:1}
.sheet .pf{border-top:1px solid var(--line);padding:11px 12px;display:flex;gap:9px;align-items:center}
.sheet .pf input{border-radius:999px}
.sheet .pf button{flex:none;font-weight:700;color:var(--accent);padding:0 6px}
@media(min-width:720px){.sheet{align-items:center}.sheet .panel{border-radius:18px;border-bottom:1px solid var(--line)}}

.cmt{display:flex;gap:10px;padding:11px 0;border-bottom:1px solid rgba(255,255,255,.05)}
.cmt .av{width:32px;height:32px;border-radius:50%;background:var(--bg-3);flex:none;object-fit:cover}
.cmt .c b{font-size:13.5px}
.cmt .c p{margin:2px 0 0;font-size:14px}
.cmt .c time{font-size:12px;color:var(--dim)}

/* ---------- upload ---------- */
.up{max-width:560px;margin:0 auto;width:100%;padding:12px 16px 40px}
.drop{border:1.5px dashed var(--line);border-radius:16px;padding:34px 18px;text-align:center;background:var(--bg-2)}
.drop.on{border-color:var(--accent);background:rgba(255,45,111,.07)}
.drop p{color:var(--muted);margin:10px 0 0;font-size:14px}
.up label{display:block;font-size:13px;color:var(--muted);font-weight:600;margin:16px 0 6px}
.up .prev{margin-top:14px;border-radius:14px;overflow:hidden;background:#000;max-height:56dvh}
.up .prev video,.up .prev img{width:100%;max-height:56dvh;object-fit:contain}

/* ---------- auth ---------- */
.auth{max-width:380px;margin:0 auto;padding:30px 20px 50px;text-align:center}
.auth h2{font-size:23px;margin:16px 0 6px;font-weight:650}
.auth p.sub{color:var(--muted);margin:0 0 20px;font-size:14px}
.auth label{text-align:left;display:block;font-size:13px;color:var(--muted);font-weight:600;margin:12px 0 6px}
.auth .btn{width:100%;margin-top:16px;padding:13px}
.auth .alt{margin-top:16px;font-size:14px;color:var(--muted)}
.auth .alt button{color:var(--ink);font-weight:650}

/* ---------- misc ---------- */
.toast{position:fixed;left:50%;bottom:calc(84px + var(--safe-b));transform:translateX(-50%);z-index:90;
  background:var(--bg-3);border:1px solid var(--line);padding:11px 18px;border-radius:999px;font-size:14px;
  opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;max-width:88vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(-6px)}
.banner{background:linear-gradient(135deg,rgba(255,45,111,.14),rgba(123,44,255,.14));border-bottom:1px solid var(--line);
  padding:9px 14px;font-size:13px;color:#d9d9e4;text-align:center}
.banner b{color:#fff}
.searchrow{padding:6px 14px 10px;max-width:640px;margin:0 auto;width:100%}
.chips{display:flex;gap:8px;overflow-x:auto;padding:4px 14px 12px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex:none;padding:7px 14px;border-radius:999px;background:var(--bg-3);border:1px solid var(--line);
  font-size:13.5px;font-weight:600;color:var(--muted);white-space:nowrap}
.chip.on{background:var(--ink);color:#0b0b0f;border-color:transparent}
.pagewrap{flex:1;overflow-y:auto}
.foot{padding:26px 16px 40px;color:var(--dim);font-size:12.5px;text-align:center;line-height:1.7}
.foot a{color:var(--muted)}

@media(min-width:900px){
  .rail{display:flex}
  .tabbar{display:none}

  .meta{right:92px}
}