:root{
  --brand:#0f766e; --brand-dark:#115e59; --brand-light:#ccfbf1;
  --danger:#dc2626; --warn:#ea580c; --ok:#16a34a; --info:#0369a1;
  --ink:#0f172a; --ink2:#475569; --ink3:#94a3b8;
  --bg:#f1f5f9; --card:#ffffff; --line:#e2e8f0;
  --r:14px; --r-sm:10px;
  --safe-b: env(safe-area-inset-bottom, 0px);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink); background:var(--bg);
  padding-bottom:calc(64px + var(--safe-b));
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35}
p{margin:0 0 10px}
a{color:var(--brand);text-decoration:none}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px;padding-top:calc(12px + env(safe-area-inset-top,0px));
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;box-shadow:0 2px 12px rgba(0,0,0,.12);
}
.brand{display:flex;align-items:center;gap:8px}
.logo{font-size:20px}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.3px}
.badge{
  background:rgba(255,255,255,.2);color:#fff;border:0;
  padding:4px 10px;border-radius:99px;font-size:12px;font-weight:600
}

/* ---------- layout ---------- */
#view{padding:14px;max-width:720px;margin:0 auto}
.card{
  background:var(--card);border-radius:var(--r);padding:16px;margin-bottom:12px;
  box-shadow:0 1px 3px rgba(15,23,42,.06)
}
.card-title{display:flex;align-items:center;gap:8px;font-size:16px;margin-bottom:10px}
.card-title .ic{font-size:18px}
.muted{color:var(--ink2);font-size:14px}
.tiny{font-size:12.5px;color:var(--ink3);line-height:1.55}
.center{text-align:center}
.mt8{margin-top:8px}.mt12{margin-top:12px}.mt16{margin-top:16px}
.row{display:flex;gap:10px}
.row>*{flex:1}

/* ---------- hero ---------- */
.hero{
  background:linear-gradient(135deg,#0f766e,#0e7490);
  color:#fff;border-radius:var(--r);padding:20px;margin-bottom:14px;
}
.hero h2{font-size:20px;margin-bottom:6px}
.hero p{color:rgba(255,255,255,.9);font-size:14px;margin:0}
.hero .stat{display:flex;gap:18px;margin-top:14px}
.hero .stat div{font-size:12px;color:rgba(255,255,255,.85)}
.hero .stat b{display:block;font-size:19px;color:#fff}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  width:100%;padding:14px 16px;border:0;border-radius:var(--r-sm);
  background:var(--brand);color:#fff;font-size:16px;font-weight:600;
  cursor:pointer;transition:.15s;font-family:inherit
}
.btn:active{transform:scale(.98);background:var(--brand-dark)}
.btn.ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand)}
.btn.gray{background:#e2e8f0;color:var(--ink)}
.btn.sm{padding:10px 14px;font-size:14.5px;width:auto}
.btn.danger{background:var(--danger)}
.btn:disabled{opacity:.5;pointer-events:none}

/* quick actions */
.qa{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.qa button{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:16px 12px;text-align:left;cursor:pointer;font-family:inherit;
  font-size:15px;font-weight:600;color:var(--ink);transition:.15s
}
.qa button:active{background:var(--brand-light);border-color:var(--brand)}
.qa .ic{display:block;font-size:22px;margin-bottom:6px}
.qa .sub{display:block;font-size:12px;color:var(--ink3);font-weight:400;margin-top:2px}

/* ---------- forms ---------- */
label.fld{display:block;margin-bottom:12px}
label.fld span{display:block;font-size:13.5px;font-weight:600;color:var(--ink2);margin-bottom:6px}
input,textarea,select{
  width:100%;padding:12px;border:1.5px solid var(--line);border-radius:var(--r-sm);
  font-size:16px;font-family:inherit;background:#fff;color:var(--ink)
}
input:focus,textarea:focus,select:focus{outline:0;border-color:var(--brand)}
textarea{min-height:120px;resize:vertical;line-height:1.6}

/* ---------- file pick ---------- */
.drop{
  border:2px dashed var(--line);border-radius:var(--r);padding:26px 16px;text-align:center;
  background:#fff;cursor:pointer;transition:.15s
}
.drop:active,.drop.on{border-color:var(--brand);background:var(--brand-light)}
.drop .ic{font-size:34px;display:block;margin-bottom:8px}
.drop b{display:block;font-size:15px;margin-bottom:4px}

/* ---------- results ---------- */
.risk{
  border-radius:var(--r);padding:14px;margin-bottom:10px;border-left:5px solid;
  background:#fff;box-shadow:0 1px 3px rgba(15,23,42,.06)
}
.risk.high{border-color:var(--danger);background:#fef2f2}
.risk.mid{border-color:var(--warn);background:#fff7ed}
.risk.low{border-color:var(--ok);background:#f0fdf4}
.risk .rh{display:flex;align-items:flex-start;gap:8px;margin-bottom:8px}
.risk .lv{
  flex:0 0 auto;font-size:11px;font-weight:700;padding:3px 8px;border-radius:6px;color:#fff
}
.risk.high .lv{background:var(--danger)}
.risk.mid .lv{background:var(--warn)}
.risk.low .lv{background:var(--ok)}
.risk h4{font-size:15px}
.risk .quote{
  background:rgba(0,0,0,.045);border-radius:8px;padding:9px 11px;margin:8px 0;
  font-size:13.5px;color:#334155;font-style:italic;word-break:break-all
}
.risk .why{font-size:13.5px;color:var(--ink2);margin-bottom:8px}
.risk .todo{
  font-size:13.5px;background:#fff;border-radius:8px;padding:9px 11px;
  border:1px solid rgba(0,0,0,.06)
}
.risk .todo b{color:var(--brand)}
.score-wrap{text-align:center;padding:20px 16px}
.score{
  font-size:52px;font-weight:800;line-height:1;letter-spacing:-2px
}
.score.s-high{color:var(--danger)}
.score.s-mid{color:var(--warn)}
.score.s-low{color:var(--ok)}
.score-lbl{font-size:14px;color:var(--ink2);margin-top:6px}

/* pills */
.pills{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0}
.pill{
  font-size:12.5px;padding:5px 11px;border-radius:99px;background:#f1f5f9;
  color:var(--ink2);border:1px solid var(--line);cursor:pointer;font-family:inherit
}
.pill.on{background:var(--brand);color:#fff;border-color:var(--brand)}

/* evidence */
.ev{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}
.ev figure{margin:0;background:#0f172a;border-radius:10px;overflow:hidden;position:relative}
.ev img{width:100%;height:88px;object-fit:cover;display:block}
.ev figcaption{font-size:11px;color:#fff;background:rgba(0,0,0,.55);padding:4px 6px;
  position:absolute;bottom:0;left:0;right:0;text-align:center}

/* seal result */
.seal-card{
  background:linear-gradient(135deg,#0f766e,#0e7490);color:#fff;
  border-radius:var(--r);padding:18px;margin-bottom:12px
}
.seal-card .code{
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:19px;font-weight:700;
  letter-spacing:1px;background:rgba(255,255,255,.16);padding:8px 12px;border-radius:8px;
  display:inline-block;margin:6px 0;word-break:break-all
}
.seal-card .hash{font-family:ui-monospace,monospace;font-size:11px;word-break:break-all;
  color:rgba(255,255,255,.85);line-height:1.5}

/* guide */
.acc{border:1px solid var(--line);border-radius:var(--r-sm);margin-bottom:8px;background:#fff;overflow:hidden}
.acc>.hd{display:flex;justify-content:space-between;align-items:center;padding:14px;cursor:pointer;font-weight:600;font-size:15px}
.acc>.hd .arw{transition:.2s;color:var(--ink3)}
.acc.open>.hd .arw{transform:rotate(90deg)}
.acc>.bd{display:none;padding:0 14px 14px;font-size:14.5px;color:var(--ink2);line-height:1.75}
.acc.open>.bd{display:block}
.acc .bd ul{padding-left:19px;margin:8px 0}
.acc .bd li{margin-bottom:6px}

/* toast & modal */
.toast{
  position:fixed;left:50%;bottom:calc(84px + var(--safe-b));transform:translateX(-50%);
  background:rgba(15,23,42,.94);color:#fff;padding:11px 20px;border-radius:99px;
  font-size:14px;z-index:200;max-width:88vw;text-align:center;animation:up .25s
}
@keyframes up{from{opacity:0;transform:translate(-50%,10px)}to{opacity:1;transform:translate(-50%,0)}}
.modal{position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:300;
  display:flex;align-items:flex-end;justify-content:center;animation:fade .2s}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal-box{
  background:#fff;border-radius:18px 18px 0 0;padding:20px;width:100%;max-width:720px;
  max-height:86vh;overflow:auto;padding-bottom:calc(20px + var(--safe-b));animation:slide .25s
}
@keyframes slide{from{transform:translateY(30px)}to{transform:translateY(0)}}
.modal-box h3{margin-bottom:12px;font-size:18px}

/* tabbar */
.tabbar{
  position:fixed;bottom:0;left:0;right:0;z-index:100;
  display:flex;background:#fff;border-top:1px solid var(--line);
  padding-bottom:var(--safe-b);box-shadow:0 -2px 12px rgba(15,23,42,.06)
}
.tab{
  flex:1;background:none;border:0;padding:8px 2px 7px;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;gap:2px;
  font-size:11px;color:var(--ink3);font-family:inherit;transition:.15s
}
.tab i{font-size:20px;font-style:normal;line-height:1.15}
.tab.active{color:var(--brand);font-weight:600}
.tab.active i{transform:translateY(-1px)}

/* misc */
.divider{height:1px;background:var(--line);margin:14px 0}
.tag-ok{color:var(--ok);font-weight:600}
.kv{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--line);font-size:14px}
.kv:last-child{border:0}
.kv b{color:var(--ink)}