:root{--bg:#f4f7fb;--fg:#13202e;--mut:#5a6b7d;--card:#fff;--line:#dbe3ee;--a:#2563eb;--a2:#1d4fd0;--g:#3fae14;--warn:#d97706;--bad:#dc2626;color-scheme:light}
@media(prefers-color-scheme:dark){:root{--bg:#0b1220;--fg:#eaf1fb;--mut:#92a3b8;--card:#131d2f;--line:#243149;--a:#4b86f7;--a2:#6b9bf9;--g:#7cf03a;color-scheme:dark}}
*{box-sizing:border-box}[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;padding-bottom:env(safe-area-inset-bottom)}
.w{max-width:560px;margin:0 auto;padding:0 16px}
a{color:var(--a)}
.hero{background:#14388f center/cover no-repeat;color:#fff;padding:calc(26px + env(safe-area-inset-top)) 0 52px;position:relative}
.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,20,60,.78),rgba(6,20,60,.1))}
.hero-in{position:relative}
.ic{width:64px;height:64px;border-radius:15px;box-shadow:0 8px 28px rgba(0,0,0,.4);display:block;margin-bottom:10px}
h1{font-size:clamp(30px,8vw,42px);margin:0 0 4px;letter-spacing:-.02em;line-height:1.1}
.tag{font-size:clamp(17px,4.4vw,21px);margin:0 0 4px}.meta{margin:0;font-size:14px;opacity:.85}
.lang{position:absolute;top:calc(12px + env(safe-area-inset-top));right:14px;z-index:2;background:rgba(0,0,0,.4);color:#fff;border:0;border-radius:999px;padding:6px 14px;font:inherit;font-size:14px;cursor:pointer}
main{margin-top:-34px;position:relative}
.app{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:0 10px 30px rgba(10,30,70,.14);overflow:hidden}
.tabs{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--line)}
.tabs button{border:0;background:none;color:var(--mut);font:inherit;font-size:15px;padding:12px 4px 10px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:0;border-bottom:3px solid transparent}
.tabs .ti{font-size:20px;line-height:1.2}
.tabs button[aria-selected=true]{color:var(--a);border-bottom-color:var(--a);font-weight:700}
.panel{padding:20px 18px 22px}
.big{width:100%;display:flex;align-items:center;justify-content:center;gap:14px;border:0;border-radius:20px;padding:22px 16px;font:inherit;font-size:21px;font-weight:700;color:#fff;background:linear-gradient(160deg,#2563eb,#1d4fd0);box-shadow:0 8px 20px rgba(37,99,235,.35);cursor:pointer;transition:transform .1s}
.big:active{transform:scale(.98)}.big[disabled]{opacity:.7}
.big-ic{width:44px;height:44px;border-radius:50%;background:#fff;color:var(--a2);display:grid;place-items:center;font-size:26px;font-weight:800}
.card{background:var(--bg);border:1px solid var(--line);border-radius:16px;padding:14px 16px;margin-top:16px}
.card-h{display:flex;flex-wrap:wrap;justify-content:space-between;gap:2px 12px;align-items:baseline}.card-h b{white-space:nowrap}
.card p{margin:6px 0 0}
.empty{text-align:center;padding:26px 8px 6px}.empty p{margin:6px 0 14px}
.mut{color:var(--mut)}.small{font-size:14px}
.msg{margin:14px 0 0;padding:10px 14px;border-radius:12px;background:var(--bg);border:1px solid var(--line);font-size:15px}
.msg.err{border-color:var(--bad);color:var(--bad)}.msg.warn{border-color:var(--warn);color:var(--warn)}.msg.ok{border-color:var(--g)}
.lbl{display:block;margin:12px 0 6px;font-size:14px;color:var(--mut)}
input[type=text],input[type=number]{width:100%;font:inherit;font-size:17px;padding:11px 12px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--fg)}
.row{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.btn{font:inherit;font-size:16px;font-weight:600;padding:11px 16px;border-radius:12px;border:1px solid var(--line);background:var(--card);color:var(--fg);cursor:pointer;text-decoration:none;display:inline-block;text-align:center}
.btn.pri{background:#2563eb;border-color:#2563eb;color:#fff}.btn.ghost{color:var(--mut)}
.row .btn{flex:1 1 auto}
.dist{text-align:center;margin-bottom:4px}.dist span{font-size:clamp(44px,14vw,64px);font-weight:800;letter-spacing:-.03em;color:var(--a);display:block;line-height:1.1}.dist small{color:var(--mut);font-size:16px}
.finder{position:relative;width:min(100%,340px);aspect-ratio:1;margin:8px auto 0}
.finder canvas{width:100%;height:100%;display:block}
.arrow{position:absolute;left:50%;top:50%;width:34%;height:34%;margin:-17% 0 0 -17%;transition:transform .15s linear;filter:drop-shadow(0 3px 6px rgba(0,0,0,.3))}
.arrow path{fill:var(--g);stroke:#fff;stroke-width:4;stroke-linejoin:round}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{font:inherit;font-weight:600;padding:12px 18px;border-radius:999px;border:1px solid var(--line);background:var(--bg);color:var(--fg);cursor:pointer;flex:1 1 auto}
.chip[aria-pressed=true]{background:#2563eb;border-color:#2563eb;color:#fff}
#presets .chip{font-size:18px}
.cust input{flex:2 1 120px}
h2{font-size:20px;margin:0 0 4px}.how h2{margin-top:30px}
.ring{position:relative;width:min(100%,260px);aspect-ratio:1;margin:6px auto}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:9}.rt{stroke:var(--line)}.rp{stroke:var(--a);stroke-linecap:round;stroke-dasharray:339.3;transition:stroke-dashoffset .5s linear,stroke .3s}
.ring.warn .rp{stroke:var(--warn)}.ring.done .rp{stroke:var(--bad)}
.ring-in{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
#clock{font-size:clamp(40px,12vw,54px);font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.ring-in small{color:var(--mut)}
.how ol{padding-left:22px;margin:8px 0 16px}.how li{margin:6px 0}
footer{padding:18px 16px 44px;color:var(--mut);font-size:14px;text-align:center}footer p{margin:6px 0}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(18px + env(safe-area-inset-bottom));background:#101a2b;color:#fff;border-radius:14px;padding:10px 12px 10px 16px;display:flex;gap:12px;align-items:center;box-shadow:0 8px 24px rgba(0,0,0,.35);z-index:10;max-width:92vw}
.toast button{background:none;border:0;color:#8fb4ff;font:inherit;font-weight:700;cursor:pointer}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}