:root{
  --ink:#0f1e3d;--ink2:#1f3a6e;--paper:#f5f7fb;--card:#ffffff;--line:#e4e9f2;
  --teal:#0fb5b0;--teal-d:#0a8d89;--coral:#ff6a5a;--coral-d:#e8503f;--amber:#ffb020;
  --muted:#6b7896;--good:#2bb673;--mid:#ffb020;--bad:#ff6a5a;
}
*{box-sizing:border-box;}
[hidden]{display:none !important;}
html,body{margin:0;padding:0;}
body{
  font-family:'Be Vietnam Pro','Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif;
  color:var(--ink);background:var(--paper);min-height:100vh;-webkit-font-smoothing:antialiased;line-height:1.5;
}
.sd-wrap{max-width:760px;margin:0 auto;padding:0 16px 80px;}
.sd-top{position:sticky;top:0;z-index:20;background:rgba(245,247,251,.86);backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line);padding:14px 16px;display:flex;
  align-items:center;justify-content:center;gap:10px;}
.sd-top.between{justify-content:space-between;max-width:760px;margin:0 auto;}
.sd-logo{font-weight:800;letter-spacing:.5px;font-size:18px;color:var(--ink);text-decoration:none;}
.sd-logo span{color:var(--teal);}
.sd-badge{font-size:9px;font-weight:800;background:var(--teal);color:#fff;padding:2px 6px;border-radius:5px;vertical-align:super;margin-left:2px;}
.sd-back{color:var(--teal-d);text-decoration:none;font-weight:700;font-size:14px;}

/* upload */
.sd-hero{padding:48px 0 24px;text-align:center;}
.sd-h1{font-size:30px;font-weight:800;line-height:1.15;letter-spacing:-.5px;margin:0 0 10px;}
.sd-h1 em{font-style:normal;color:var(--teal);}
.sd-sub{color:var(--muted);font-size:15px;max-width:440px;margin:0 auto 28px;line-height:1.5;}
.sd-drop{border:2px dashed var(--line);background:var(--card);border-radius:20px;padding:38px 20px;
  cursor:pointer;transition:.18s;display:block;}
.sd-drop:hover{border-color:var(--teal);background:#f0fbfb;}
.sd-drop.drag{border-color:var(--teal);background:#f0fbfb;transform:scale(.995);}
.sd-dropicon{width:56px;height:56px;border-radius:16px;background:linear-gradient(135deg,var(--teal),var(--teal-d));
  display:flex;align-items:center;justify-content:center;margin:0 auto 14px;color:#fff;}
.sd-droptitle{font-weight:700;font-size:16px;margin-bottom:4px;}
.sd-drophint{color:var(--muted);font-size:13px;}
.sd-or{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:12px;margin:16px 0;}
.sd-or::before,.sd-or::after{content:"";flex:1;height:1px;background:var(--line);}
.sd-cambtn{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;border:1.5px solid var(--line);
  background:#fff;color:var(--ink);border-radius:14px;padding:13px;font-weight:700;font-size:14px;cursor:pointer;font-family:inherit;}
.sd-cambtn:hover{border-color:var(--teal);color:var(--teal-d);}
.sd-cambtn svg{width:18px;height:18px;}
.sd-tips{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:18px;}
.sd-tip{font-size:12px;color:var(--muted);background:var(--card);border:1px solid var(--line);padding:6px 12px;border-radius:999px;}

/* analyzing overlay */
.sd-loading{position:fixed;inset:0;z-index:100;background:rgba(245,247,251,.92);backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center;}
.sd-scan{width:200px;height:200px;margin:0 auto 26px;border-radius:24px;overflow:hidden;position:relative;
  box-shadow:0 10px 40px rgba(15,30,61,.15);background:#0e1424;}
.sd-scan img{width:100%;height:100%;object-fit:cover;}
.sd-scanline{position:absolute;left:0;right:0;height:3px;background:linear-gradient(90deg,transparent,var(--teal),transparent);
  box-shadow:0 0 16px var(--teal);animation:scan 1.8s ease-in-out infinite;}
@keyframes scan{0%{top:6%}50%{top:92%}100%{top:6%}}
.sd-loading h3{font-size:18px;font-weight:700;margin:0 0 6px;}
.sd-loading p{color:var(--muted);font-size:14px;min-height:20px;margin:0;}
.sd-dots{margin-top:10px;}
.sd-dots span{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--teal);margin:0 3px;animation:bnc 1.2s infinite;}
.sd-dots span:nth-child(2){animation-delay:.2s}.sd-dots span:nth-child(3){animation-delay:.4s}
@keyframes bnc{0%,80%,100%{transform:scale(.5);opacity:.4}40%{transform:scale(1);opacity:1}}

/* result blocks */
.sd-sec{margin-top:18px;}
.sd-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;}
.sd-eyebrow{font-size:11px;font-weight:800;letter-spacing:1.4px;text-transform:uppercase;color:var(--teal-d);margin-bottom:10px;}
.sd-title{font-size:17px;font-weight:800;margin:0 0 14px;display:flex;align-items:center;gap:8px;}

/* score hero */
.sd-scorecard{background:linear-gradient(135deg,#0f1e3d,#1f3a6e);color:#fff;border-radius:22px;padding:24px;overflow:hidden;}
.sd-scoretop{display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.sd-ring{position:relative;width:96px;height:96px;flex:0 0 auto;}
.sd-ring svg{transform:rotate(-90deg);}
.sd-ringnum{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;}
.sd-ringnum b{font-size:26px;font-weight:800;line-height:1;}
.sd-ringnum small{font-size:10px;opacity:.7;}
.sd-scoremeta h2{font-size:15px;font-weight:600;opacity:.8;margin:0 0 4px;}
.sd-scoremeta .lvl{font-size:22px;font-weight:800;}
.sd-faceimg{margin-top:18px;border-radius:14px;overflow:hidden;position:relative;background:#000;}
.sd-faceimg img{width:100%;display:block;}
.sd-mk{position:absolute;border:2px solid;border-radius:3px;width:14px;height:14px;transform:translate(-50%,-50%);
  box-shadow:0 0 0 1px rgba(0,0,0,.25);}
.sd-legend{display:flex;gap:14px;flex-wrap:wrap;margin-top:12px;font-size:12px;opacity:.9;}
.sd-legend i{display:inline-block;width:11px;height:11px;border-radius:3px;margin-right:5px;vertical-align:-1px;}

/* overview grid */
.sd-grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.sd-stat{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;}
.sd-stat .k{font-size:12px;color:var(--muted);margin-bottom:4px;}
.sd-stat .v{font-size:20px;font-weight:800;color:var(--ink);}
.sd-stat .v.warn{color:var(--coral-d);}

/* tone swatches */
.sd-sw{display:flex;gap:12px;margin-top:8px;}
.sd-sw div{flex:1;aspect-ratio:1;border-radius:50%;box-shadow:inset 0 0 0 1px rgba(0,0,0,.06);}
.sd-tonerow{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px dashed var(--line);font-size:14px;}
.sd-tonerow:last-child{border:0;}
.sd-tonerow b{color:var(--coral-d);}

/* gauge bars */
.sd-gauge{margin-bottom:20px;}
.sd-gaugehead{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px;font-size:14px;gap:8px;}
.sd-gaugehead b{font-weight:800;}
.sd-gaugehead .tag{font-weight:700;font-size:13px;white-space:nowrap;}
.sd-bar{position:relative;height:10px;border-radius:6px;background:#eef1f7;overflow:visible;}
.sd-barfill{height:100%;border-radius:6px;background:linear-gradient(90deg,#2bb673,#9acd32,#ffb020,#ff6a5a);}
.sd-pin{position:absolute;top:-6px;width:22px;height:22px;border-radius:50%;background:#fff;border:3px solid var(--ink);
  transform:translateX(-50%);box-shadow:0 4px 10px rgba(15,30,61,.18);}
.sd-pinlabel{position:absolute;top:-30px;transform:translateX(-50%);font-size:10px;font-weight:800;
  background:var(--ink);color:#fff;padding:2px 6px;border-radius:5px;white-space:nowrap;}
.sd-axis{display:flex;justify-content:space-between;color:var(--muted);font-size:11px;margin-top:8px;}

/* detail rows */
.sd-dl{display:grid;grid-template-columns:1fr auto;gap:6px 12px;font-size:13.5px;}
.sd-dl .lab{color:var(--muted);}
.sd-dl .val{font-weight:700;color:var(--coral-d);text-align:right;}
.sd-detailimg{width:96px;height:96px;border-radius:12px;object-fit:cover;float:left;margin:0 14px 8px 0;border:1px solid var(--line);}

/* advice */
.sd-advice p{font-size:14px;line-height:1.6;color:#33405e;margin:0 0 12px;}
.sd-route{display:flex;gap:10px;margin-bottom:10px;align-items:flex-start;}
.sd-routenum{flex:0 0 auto;width:32px;height:32px;border-radius:10px;background:var(--teal);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:12px;}
.sd-route .rc b{display:block;font-size:13px;}
.sd-route .rc span{font-size:13.5px;color:#33405e;line-height:1.5;}
.sd-sub-h{font-weight:800;font-size:14px;margin:16px 0 8px;}
.sd-chip{display:inline-block;background:#f0fbfb;color:var(--teal-d);border:1px solid #bdeae8;
  font-size:12px;font-weight:700;padding:3px 9px;border-radius:8px;margin:0 6px 6px 0;}

/* product */
.sd-prodgroup{margin-bottom:16px;}
.sd-prodgroup>b{font-size:13px;color:var(--ink2);}
.sd-prod{border-left:3px solid var(--teal);padding:8px 0 8px 12px;margin-top:8px;}
.sd-prod .pn{font-weight:700;font-size:14px;}
.sd-prod .pb{font-size:12px;color:var(--teal-d);font-weight:700;}
.sd-prod .pm{font-size:12.5px;color:var(--muted);margin-top:2px;}

/* warn */
.sd-warn{background:#fff5f3;border:1px solid #ffd9d2;border-radius:14px;padding:14px;margin-top:4px;}
.sd-warnrow{display:flex;gap:8px;padding:7px 0;border-bottom:1px dashed #ffd9d2;font-size:13.5px;}
.sd-warnrow:last-child{border:0;}
.sd-warnrow b{color:var(--coral-d);flex:0 0 auto;}

/* food */
.sd-foodgroup{margin-bottom:14px;}
.sd-foodgroup>b{font-size:13px;color:var(--ink2);}
.sd-foodrow{font-size:13.5px;padding:5px 0;color:#33405e;}
.sd-foodrow b{color:var(--ink);}

/* chat */
.sd-chatbox{background:linear-gradient(135deg,#fff6f3,#f3f9ff);border:1px solid var(--line);border-radius:18px;padding:18px;}
.sd-chatq{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0;}
.sd-chatq button{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 13px;
  font-size:12.5px;cursor:pointer;color:var(--ink2);transition:.15s;font-family:inherit;}
.sd-chatq button:hover{border-color:var(--teal);color:var(--teal-d);}
.sd-chatin{display:flex;gap:8px;}
.sd-chatin input{flex:1;border:1px solid var(--line);border-radius:12px;padding:11px 14px;font-size:14px;outline:none;font-family:inherit;}
.sd-chatin input:focus{border-color:var(--teal);}
.sd-send{background:var(--coral);color:#fff;border:0;border-radius:12px;padding:0 18px;font-weight:700;cursor:pointer;font-family:inherit;font-size:14px;}
.sd-send:disabled{opacity:.5;cursor:default;}
.sd-ans{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px;margin-top:12px;font-size:14px;line-height:1.6;color:#33405e;white-space:pre-wrap;}
.sd-ans .qq{font-weight:700;color:var(--ink);margin-bottom:6px;display:block;}

/* buttons */
.sd-actions{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap;}
.sd-btn{flex:1;min-width:160px;border:0;border-radius:14px;padding:14px;font-weight:700;font-size:14px;cursor:pointer;
  font-family:inherit;transition:.15s;text-align:center;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;}
.sd-btn.primary{background:var(--ink);color:#fff;}
.sd-btn.primary:hover{background:var(--ink2);}
.sd-btn.ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line);}
.sd-btn.ghost:hover{border-color:var(--teal);}

.sd-disc{font-size:12px;color:var(--muted);text-align:center;margin-top:24px;line-height:1.5;padding:0 12px;}
.sd-err{background:#fff5f3;border:1px solid #ffd9d2;color:var(--coral-d);border-radius:14px;padding:16px;font-size:14px;text-align:center;margin-top:16px;}
.sd-empty{text-align:center;padding:48px 16px;color:var(--muted);}
.sd-empty a{color:var(--teal-d);font-weight:700;}

/* history */
.sd-hist{margin-top:30px;}
.sd-hist h2{font-size:15px;font-weight:800;margin-bottom:12px;}
.sd-histlist{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}
.sd-histcard{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none;color:var(--ink);transition:.15s;}
.sd-histcard:hover{transform:translateY(-3px);border-color:var(--teal);}
.sd-histcard img{width:100%;aspect-ratio:1;object-fit:cover;display:block;}
.sd-histmeta{padding:7px 9px;}
.sd-histmeta .s{font-weight:800;color:var(--teal-d);display:block;}
.sd-histmeta .d{font-size:11px;color:var(--muted);}

@media (max-width:520px){
  .sd-h1{font-size:25px;}
  .sd-grid2{grid-template-columns:1fr;}
  .sd-scoretop{justify-content:center;text-align:center;}
  .sd-actions{flex-direction:column;}
  .sd-histlist{grid-template-columns:repeat(2,1fr);}
}
@media print{
  .sd-top,.sd-chatbox,.sd-actions,.sd-drop,.no-print{display:none !important;}
  body{background:#fff;}
  .sd-card,.sd-scorecard{break-inside:avoid;}
}