:root{
  --ink:#10243a; --ink-2:#1b3a5c; --paper:#f6f8fb; --card:#ffffff;
  --brand:#1f8a70; --brand-d:#13624f; --accent:#f4a825; --accent-d:#c9871a;
  --line:#dde5ee; --muted:#5b6b7c; --red:#d1453b; --green:#1f8a70;
  --r:16px;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:var(--paper);color:var(--ink);font-family:Roboto,system-ui,sans-serif;font-size:17px;line-height:1.55}
button{font:inherit;color:inherit;cursor:pointer}
.muted{color:var(--muted)}

header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 26px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.brand{background:none;border:0;font-family:Nunito,system-ui,sans-serif;font-weight:900;font-size:24px;color:var(--ink);padding:0}
.brand span{color:var(--brand)}
.tools{display:flex;align-items:center;gap:16px;font-size:14px}
.stat{color:var(--muted);font-weight:700}
.prev{display:flex;align-items:center;gap:7px;color:var(--muted);cursor:pointer}
.prev input{width:16px;height:16px;accent-color:var(--brand)}

main{max-width:980px;margin:0 auto;padding:30px 22px 60px}

.hero{text-align:center;padding:24px 0 10px}
.hero h1{font-family:Nunito,system-ui,sans-serif;font-size:46px;line-height:1.05;margin:0;font-weight:900}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero p{color:var(--muted);font-size:19px;margin:10px 0 0}
.notice{margin:20px auto 0;max-width:620px;background:#fff6e6;border:1px solid var(--accent);border-radius:12px;padding:14px 16px;color:#7a5a12;font-size:15px}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-top:26px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px 18px;text-align:left;transition:transform .08s, box-shadow .15s, border-color .15s;box-shadow:0 1px 2px rgba(16,36,58,.04)}
.card:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(16,36,58,.10);border-color:var(--brand)}
.card.empty{opacity:.55}
.card-ic{font-size:34px}
.card-t{font-family:Nunito,system-ui,sans-serif;font-weight:900;font-size:20px;margin-top:8px}
.card-s{color:var(--muted);font-size:14px}
.card-m{color:var(--brand-d);font-weight:700;font-size:14px;margin-top:10px}

.back{background:none;border:0;color:var(--brand-d);font-weight:700;padding:0;margin-bottom:14px}
.h2{font-family:Nunito,system-ui,sans-serif;font-size:30px;font-weight:900;margin:4px 0 18px}
.h2 .muted{font-size:18px;font-weight:600}

.row-wrap{display:flex;gap:12px;flex-wrap:wrap;margin:6px 0 18px}
.list{display:flex;flex-direction:column;gap:10px}
.rowitem{display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;text-align:left}
.rowitem:hover{border-color:var(--brand)}
.rowitem-t{font-family:Nunito,system-ui,sans-serif;font-weight:800;font-size:18px}
.rowitem-s{color:var(--muted);font-size:14px}
.rowitem-go{color:var(--brand);font-weight:900}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:13px 24px;font-weight:800;font-size:17px;background:var(--brand);color:#fff;box-shadow:0 4px 0 var(--brand-d);transition:transform .07s, box-shadow .07s, opacity .2s}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 var(--brand-d)}
.btn.ghost{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 2px var(--line)}
.btn.big{font-size:18px;padding:15px 28px}
.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none}

.pbarwrap{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.pbar{flex:1;height:10px;border-radius:6px;background:#e7edf4;overflow:hidden}
.pbar i{display:block;height:100%;background:linear-gradient(90deg,var(--brand-d),var(--brand));transition:width .4s}
.pnum{color:var(--muted);font-weight:700;font-size:14px;white-space:nowrap}

.card-q{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px;box-shadow:0 1px 2px rgba(16,36,58,.04)}
.qtext{font-family:Nunito,system-ui,sans-serif;font-size:24px;font-weight:800;margin:0 0 22px;line-height:1.3}
.draft{display:inline-block;vertical-align:middle;background:#fff0f0;color:var(--red);border:1px solid #f3c6c2;font-size:12px;font-weight:800;padding:2px 8px;border-radius:999px;margin-left:6px}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.opt{background:#fff;border:2px solid var(--line);border-radius:12px;padding:16px;text-align:left;font-size:17px;transition:border-color .12s, background .12s}
.opt:hover:not([disabled]){border-color:var(--brand)}
.opt.right{border-color:var(--green);background:#eaf7f2}
.opt.wrong{border-color:var(--red);background:#fdeeec}
.opt[disabled]{cursor:default}
.field{width:100%;font:inherit;font-size:18px;padding:14px 16px;border-radius:12px;border:2px solid var(--line);background:#fff}
.field:focus{outline:none;border-color:var(--brand)}
.why{margin-top:18px;font-size:16px;color:var(--ink-2)}
.why:empty{display:none}
.pfoot{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:18px}
.ref{color:var(--muted);font-size:13px}

.result{text-align:center;padding:30px 0}
.score{font-family:Nunito,system-ui,sans-serif;font-weight:900;font-size:90px;line-height:1;color:var(--brand)}
.score small{font-size:40px;color:var(--muted)}
.result h2{font-family:Nunito,system-ui,sans-serif;font-size:30px;margin:10px 0}

footer{max-width:980px;margin:0 auto;padding:20px 22px 40px;color:var(--muted);font-size:13px;display:flex;flex-direction:column;gap:4px;border-top:1px solid var(--line)}

#toast{position:fixed;left:50%;bottom:26px;transform:translate(-50%,40px);opacity:0;background:var(--ink);color:#fff;padding:13px 20px;border-radius:12px;font-weight:700;font-size:16px;transition:.3s;z-index:50;pointer-events:none}
#toast.show{transform:translate(-50%,0);opacity:1}

@media (max-width:620px){.hero h1{font-size:34px}.opts{grid-template-columns:1fr}.qtext{font-size:20px}main{padding:22px 16px 50px}}

/* tools + insights */
.linkbtn{background:none;border:0;color:var(--brand-d);font-weight:700;cursor:pointer;padding:0}
.hint{color:var(--muted);font-size:15px;margin:2px 0 16px}
.panel2{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;margin:0 0 16px}
.panel2 h3{font-family:Nunito,system-ui,sans-serif;margin:0 0 12px;font-size:19px}
.itable{width:100%;border-collapse:collapse;font-size:15px}
.itable th,.itable td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line)}
.itable th{color:var(--muted);font-family:Nunito,system-ui,sans-serif}
.spark{display:flex;align-items:flex-end;gap:5px;height:90px}
.spark .bar{flex:1;min-height:3px;background:linear-gradient(180deg,var(--brand),var(--brand-d));border-radius:3px 3px 0 0}

/* landing context */
.explain{margin-top:36px;border-top:1px solid var(--line);padding-top:26px}
.explain h3{font-family:Nunito,system-ui,sans-serif;font-size:22px;margin:0 0 14px}
.steps3{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:26px}
.steps3 div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.steps3 b{font-family:Nunito,system-ui,sans-serif}
.steps3 p{margin:6px 0 0;color:var(--muted);font-size:15px}
.why-list{list-style:none;padding:0;margin:0 0 20px;display:grid;gap:10px}
.why-list li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.disclaim{color:var(--muted);font-size:14px;background:#f0f4f8;border-radius:10px;padding:12px 14px}

/* reserved ad slot */
.adslot{margin:26px 0;min-height:90px;border:1px dashed var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;background:#fafcfe}