:root{
  --bg:#f5f6f7; --surface:#ffffff; --surface-2:#eef0f2;
  --text:#0b0e11; --muted:#8a9099; --line:#e7e9ec;
  --green:#1a9d52; --green-bg:#e8f6ee; --red:#d23b3b;
  --accent:#4f46e5; --accent-ink:#ffffff;
  --radius:18px; --radius-sm:12px;
  --safe-t:env(safe-area-inset-top,0px); --safe-b:env(safe-area-inset-bottom,0px);
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0d0f12; --surface:#15181d; --surface-2:#1e2228;
    --text:#f2f4f6; --muted:#8a9099; --line:#262b31;
    --green:#2ec27e; --green-bg:#12271c; --red:#f16363;
  }
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--text)}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,system-ui,sans-serif;
  padding-top:var(--safe-t);padding-bottom:var(--safe-b);
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
code{background:var(--surface-2);padding:1px 6px;border-radius:6px;font-size:.9em}

/* ---------- auth ---------- */
.auth{min-height:100svh;display:flex;align-items:center;justify-content:center;padding:24px}
.auth-card{width:100%;max-width:360px}
.brand{text-align:center;margin-bottom:28px}
.brand-logo{
  width:64px;height:64px;margin:0 auto 14px;border-radius:20px;
  background:linear-gradient(160deg,#2dd4bf,#4f46e5);
  box-shadow:0 10px 24px rgba(79,70,229,.28);position:relative
}
.brand-logo::before{content:"T";position:absolute;inset:0;display:grid;place-items:center;
  color:#fff;font-weight:800;font-size:34px;letter-spacing:.5px}
.brand-name{font-size:26px;font-weight:800;letter-spacing:-.5px}
.brand-sub{color:var(--muted);font-size:14px;margin-top:2px}
.form{display:flex;flex-direction:column;gap:14px}
.field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}
.field input{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:14px 16px;font-size:16px;color:var(--text);outline:none
}
.field input:focus{border-color:var(--accent)}
.form-error{color:var(--red);font-size:13px;min-height:16px}
.btn{border-radius:14px;padding:15px;font-size:16px;font-weight:600;width:100%}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-ghost{color:var(--muted);background:transparent;margin-top:6px}
.demo-note{
  margin-top:22px;padding:14px;border:1px dashed var(--line);border-radius:var(--radius-sm);
  font-size:13px;color:var(--muted);line-height:1.5;text-align:center
}
.demo-note strong{color:var(--text)}

/* ---------- app shell ---------- */
#app{max-width:480px;margin:0 auto;min-height:100svh}
.screen{padding:12px 18px 96px;min-height:100svh}
.hidden{display:none!important}
.top{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 0 14px}
.icon-btn{
  width:40px;height:40px;border-radius:50%;background:var(--surface);
  display:grid;place-items:center;font-size:20px;color:var(--text);
  box-shadow:0 1px 3px rgba(0,0,0,.05)
}
.top-actions{display:flex;gap:8px}
.wallet-pill{
  display:flex;align-items:center;gap:8px;background:var(--surface);
  padding:8px 14px;border-radius:30px;font-weight:600;font-size:15px;
  box-shadow:0 1px 3px rgba(0,0,0,.05)
}
.wallet-dot{width:18px;height:18px;border-radius:6px;background:linear-gradient(160deg,#f5b53f,#e07a1a)}
.badge-demo{
  font-size:10px;font-weight:800;letter-spacing:.5px;color:#fff;
  background:var(--accent);padding:2px 7px;border-radius:6px
}

.promo{
  display:flex;align-items:center;gap:12px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin-bottom:22px
}
.promo-ico{
  width:38px;height:38px;border-radius:50%;background:var(--green-bg);color:var(--green);
  display:grid;place-items:center;font-weight:800;flex:none
}
.promo-title{font-weight:600;font-size:14px}
.promo-sub{color:var(--muted);font-size:12px;margin-top:2px}

.balance-block{padding:4px 2px 22px}
.balance-total{font-size:46px;font-weight:800;letter-spacing:-1.5px}
.balance-change{font-size:15px;margin-top:6px}
.up{color:var(--green)} .down{color:var(--red)}

.actions{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:26px}
.actions-3{grid-template-columns:repeat(3,1fr)}
.action{
  background:var(--surface-2);border-radius:var(--radius-sm);padding:16px 6px;
  display:flex;flex-direction:column;align-items:center;gap:8px;font-size:13px;font-weight:600
}
.action .a-ico{font-size:20px;font-weight:400}
.action.accent{background:var(--accent);color:var(--accent-ink)}

.section-head{display:flex;align-items:center;justify-content:space-between;
  font-weight:700;font-size:18px;margin:6px 2px 10px}
.link{color:var(--muted);font-size:14px;font-weight:500}

.token-list{list-style:none;margin:0;padding:0}
.token{display:flex;align-items:center;gap:14px;padding:14px 4px;cursor:pointer}
.token:active{opacity:.6}
.t-ico{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  color:#fff;font-weight:700;font-size:15px;flex:none}
.t-main{flex:1;min-width:0}
.t-name{font-weight:600;font-size:16px}
.t-amt{color:var(--muted);font-size:13px;margin-top:2px}
.t-right{text-align:right}
.t-val{font-weight:600;font-size:16px}
.t-chg{font-size:13px;margin-top:2px}

.bottom-nav{
  position:fixed;left:50%;transform:translateX(-50%);bottom:calc(14px + var(--safe-b));
  width:min(92%,440px);background:var(--surface);border:1px solid var(--line);
  border-radius:30px;display:flex;justify-content:space-around;padding:12px 10px;
  box-shadow:0 8px 28px rgba(0,0,0,.10)
}
.nav-item{font-size:20px;color:var(--muted);width:44px;height:28px}
.nav-item.active{color:var(--text)}

/* ---------- coin detail ---------- */
.coin-head{display:flex;align-items:center;gap:10px}
.coin-ico{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700}
.coin-sym{font-weight:800;font-size:18px;line-height:1}
.coin-name{color:var(--muted);font-size:12px;margin-top:3px}
.coin-price{padding:14px 2px 2px}
.cp-value{font-size:30px;font-weight:800;letter-spacing:-.5px}
.cp-change{font-size:14px;margin-top:4px}
.chart-wrap{margin:12px 0}
#chart{width:100%;height:170px;display:block}
.timeframes{display:flex;gap:4px;overflow-x:auto;padding:4px 0 2px;scrollbar-width:none}
.timeframes::-webkit-scrollbar{display:none}
.timeframes button{color:var(--muted);font-size:14px;font-weight:600;padding:7px 12px;border-radius:12px;flex:none}
.timeframes button.on{background:var(--surface-2);color:var(--text)}
.coin-balance{padding:20px 2px 8px}
.cb-label{color:var(--muted);font-size:14px}
.cb-value{font-size:30px;font-weight:800;margin-top:4px}
.cb-sub{color:var(--muted);font-size:14px;margin-top:2px}
.coin-footer{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(14px + var(--safe-b));
  width:min(92%,440px);display:flex;gap:12px}
.btn-buy{background:var(--green);color:#fff}
.btn-sell{background:var(--red);color:#fff}

/* ---------- history ---------- */
.screen-title{font-weight:700;font-size:18px}
.tx-list{list-style:none;margin:0;padding:0}
.tx{display:flex;align-items:center;gap:14px;padding:16px 4px;border-bottom:1px solid var(--line)}
.tx-ico{width:42px;height:42px;border-radius:50%;background:var(--surface-2);display:grid;place-items:center;font-size:18px;flex:none}
.tx-main{flex:1}
.tx-type{font-weight:600;font-size:15px;text-transform:capitalize}
.tx-date{color:var(--muted);font-size:13px;margin-top:2px}
.tx-amt{font-weight:600;text-align:right}

/* ---------- bottom sheet ---------- */
.sheet-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:40}
.sheet{
  position:fixed;left:0;right:0;bottom:0;z-index:50;background:var(--surface);
  border-radius:24px 24px 0 0;padding:10px 20px calc(26px + var(--safe-b));
  max-width:480px;margin:0 auto;max-height:90svh;overflow-y:auto;
  box-shadow:0 -10px 40px rgba(0,0,0,.2);animation:slideUp .22s ease
}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:translateY(0)}}
@media (prefers-reduced-motion:reduce){.sheet{animation:none}}
.sheet-handle{width:40px;height:4px;border-radius:3px;background:var(--line);margin:4px auto 16px}
.sheet h3{margin:0 0 4px;font-size:20px}
.sheet .sub{color:var(--muted);font-size:14px;margin:0 0 18px}
.sheet .field{margin-bottom:14px}
.sheet .btn{margin-top:6px}
.select-row{display:flex;gap:10px}
.select-row .field{flex:1}
select{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:14px 16px;font-size:16px;color:var(--text);width:100%}

.qr{width:200px;height:200px;margin:6px auto 16px;border-radius:16px;background:#fff;
  padding:12px;border:1px solid var(--line)}
.addr-box{display:flex;align-items:center;gap:10px;background:var(--surface-2);
  border-radius:var(--radius-sm);padding:14px;font-size:13px;word-break:break-all}
.addr-box button{color:var(--accent);font-weight:600;flex:none}
.chain-tag{display:inline-block;background:var(--surface-2);color:var(--muted);
  font-size:12px;padding:4px 10px;border-radius:20px;margin-bottom:14px}

.kyc-banner{display:flex;gap:12px;background:var(--green-bg);border-radius:var(--radius-sm);
  padding:14px;margin-bottom:16px;font-size:13px;color:var(--text);line-height:1.45}
.kyc-banner .kb-ico{font-size:20px}
.kyc-ok{color:var(--green);font-weight:600;display:flex;align-items:center;gap:6px;margin-bottom:14px}

.sheet-note{font-size:12px;color:var(--muted);text-align:center;margin-top:14px;line-height:1.5}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;bottom:calc(90px + var(--safe-b));transform:translateX(-50%);
  background:var(--text);color:var(--bg);padding:12px 20px;border-radius:30px;font-size:14px;
  font-weight:600;z-index:60;max-width:88%;text-align:center;box-shadow:0 6px 20px rgba(0,0,0,.25)}

/* ---------- KYC failed state ---------- */
.kyc-fail{display:flex;align-items:center;gap:8px;color:var(--red);font-weight:600;
  background:rgba(210,59,59,.10);border-radius:var(--radius-sm);padding:12px 14px;margin-bottom:16px}
.kyc-fail-big{width:64px;height:64px;margin:6px auto 10px;border-radius:50%;
  background:rgba(210,59,59,.12);color:var(--red);display:grid;place-items:center;
  font-size:30px;font-weight:700}

/* ---------- language toggle ---------- */
.lang-btn{height:40px;padding:0 12px;border-radius:30px;background:var(--surface);
  display:inline-flex;align-items:center;gap:6px;font-weight:700;font-size:13px;color:var(--text);
  box-shadow:0 1px 3px rgba(0,0,0,.05)}
.auth-card{position:relative}
.lang-btn-top{position:absolute;top:0;right:0;height:36px}

/* ---------- auth login/register switch ---------- */
.auth-switch{text-align:center;margin-top:16px;font-size:14px;color:var(--muted)}
.link-btn{color:var(--accent);font-weight:600;background:none;padding:0 4px}