:root{
  --bg:#f6f8fb; --card:#ffffff; --ink:#0f172a; --muted:#64748b; --line:#e6eaf1;
  --accent:#2563eb; --accent-ink:#1d4ed8; --accent-soft:#eff4ff;
  --green:#059669; --green-soft:#ecfdf5; --amber:#b45309; --amber-soft:#fffbeb;
  --shadow:0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(15,23,42,.06);
  --radius:16px;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
html,body{margin:0}
body{
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  background:radial-gradient(1200px 500px at 50% -10%,#eaf1ff 0%,var(--bg) 55%);
  color:var(--ink); min-height:100vh; -webkit-font-smoothing:antialiased;
}
a{color:var(--accent-ink)}

/* top bar */
.topbar{display:flex;align-items:center;justify-content:space-between;
  padding:16px 22px;max-width:900px;margin:0 auto}
.brand{font-weight:700;font-size:19px;letter-spacing:-.02em}
.brand b{color:var(--accent)}
.logo{filter:drop-shadow(0 2px 6px rgba(37,99,235,.35))}
.top-right{display:flex;gap:8px;align-items:center}
.pill{font-size:12px;font-weight:600;padding:6px 12px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-ink);border:1px solid #dbe6ff}
.pill.live{background:var(--green-soft);color:var(--green);border-color:#bbf7d0}
.pill.sandbox{background:var(--amber-soft);color:var(--amber);border-color:#fde68a}
.pill-ghost{background:#fff;color:var(--muted);border:1px solid var(--line)}

/* layout */
.wrap{max-width:900px;margin:0 auto;padding:12px 22px 40px}
.hero{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:30px}
.hero h1{font-size:30px;line-height:1.1;letter-spacing:-.03em;margin:0 0 8px}
.sub{color:var(--muted);margin:0 0 22px;font-size:15px}

.field{margin-bottom:18px}
.step{display:inline-block;font-size:12px;font-weight:700;text-transform:uppercase;
  letter-spacing:.06em;color:var(--muted);margin-bottom:8px}
.link-row{display:flex;gap:8px}
input#url,textarea{
  width:100%;border:1.5px solid var(--line);border-radius:12px;padding:14px 15px;
  font:inherit;font-size:15px;background:#fbfcfe;color:var(--ink);transition:.15s;
  resize:vertical}
input#url:focus,textarea:focus{outline:none;border-color:var(--accent);
  background:#fff;box-shadow:0 0 0 4px var(--accent-soft)}
.ghost-btn{border:1.5px solid var(--line);background:#fff;border-radius:12px;
  padding:0 16px;font:inherit;font-weight:600;color:var(--muted);cursor:pointer;transition:.15s}
.ghost-btn:hover{border-color:var(--accent);color:var(--accent-ink)}

.examples{display:flex;flex-wrap:wrap;gap:7px;margin-top:10px}
.ex{font-size:12.5px;padding:5px 11px;border-radius:999px;background:#f1f5f9;
  color:var(--muted);cursor:pointer;border:1px solid transparent;transition:.15s}
.ex:hover{background:var(--accent-soft);color:var(--accent-ink);border-color:#dbe6ff}

/* detect box */
.detect{margin-top:12px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;
  padding:12px 14px;background:#fbfcfe;border:1px dashed var(--line);border-radius:12px}
.detect .plat{display:flex;align-items:center;gap:8px;font-weight:700}
.detect .plat .emoji{font-size:20px}
.detect .ctype{font-size:12px;color:var(--muted);background:#fff;border:1px solid var(--line);
  padding:3px 9px;border-radius:999px;text-transform:capitalize}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{font-size:11.5px;padding:4px 9px;border-radius:8px;background:var(--accent-soft);
  color:var(--accent-ink);border:1px solid #dbe6ff;white-space:nowrap}
.chip small{opacity:.7;font-weight:600}

/* buttons */
.primary-btn{width:100%;border:0;border-radius:12px;padding:15px;font:inherit;
  font-weight:700;font-size:15.5px;color:#fff;cursor:pointer;
  background:linear-gradient(180deg,#3b82f6,var(--accent));box-shadow:0 6px 16px rgba(37,99,235,.3);
  transition:.15s}
.primary-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 10px 22px rgba(37,99,235,.36)}
.primary-btn:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}
.primary-btn.loading{position:relative;color:transparent}
.primary-btn.loading::after{content:"";position:absolute;inset:0;margin:auto;width:20px;height:20px;
  border:2.5px solid rgba(255,255,255,.5);border-top-color:#fff;border-radius:50%;
  animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.error-msg{margin-top:12px;color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;
  padding:11px 14px;border-radius:10px;font-size:14px}

/* results */
.results{margin-top:22px}
.understanding{font-size:15px;color:var(--ink);background:var(--accent-soft);
  border:1px solid #dbe6ff;border-radius:12px;padding:13px 16px;margin-bottom:14px}
.understanding b{color:var(--accent-ink)}
.cards{display:flex;flex-direction:column;gap:12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow);padding:16px 18px;transition:.15s}
.card.off{opacity:.5}
.card-head{display:flex;align-items:flex-start;gap:12px}
.card-check{margin-top:3px;width:19px;height:19px;accent-color:var(--accent);cursor:pointer;flex:none}
.card-main{flex:1;min-width:0}
.card-title{font-weight:700;font-size:16px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.badge{font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;
  padding:3px 8px;border-radius:6px;background:#f1f5f9;color:var(--muted)}
.badge.refill{background:var(--green-soft);color:var(--green)}
.badge.type{background:var(--accent-soft);color:var(--accent-ink)}
.svc-name{font-size:12.5px;color:var(--muted);margin-top:3px;line-height:1.4}
.card-price{text-align:right;flex:none}
.card-price .amt{font-weight:800;font-size:19px;color:var(--green)}
.card-price .per{font-size:11px;color:var(--muted)}

.qty-row{display:flex;align-items:center;gap:10px;margin-top:12px;flex-wrap:wrap}
.qty-row label{font-size:12.5px;color:var(--muted);font-weight:600}
.qty-row input{width:120px;border:1.5px solid var(--line);border-radius:9px;padding:8px 10px;
  font:inherit;font-size:14px}
.qty-row input:focus{outline:none;border-color:var(--accent)}
.range{font-size:11.5px;color:var(--muted)}

.comments{margin-top:12px;display:flex;flex-direction:column;gap:7px}
.comments .clabel{font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.comment-in{display:flex;gap:7px;align-items:center}
.comment-in input{flex:1;border:1.5px solid var(--line);border-radius:9px;padding:9px 11px;font:inherit;font-size:14px}
.comment-in input:focus{outline:none;border-color:var(--accent)}
.cdel{border:0;background:#f1f5f9;color:var(--muted);border-radius:8px;width:32px;height:32px;
  cursor:pointer;font-size:15px;flex:none}
.cdel:hover{background:#fee2e2;color:#b91c1c}
.cadd{align-self:flex-start;font-size:12.5px;color:var(--accent-ink);background:none;border:0;
  cursor:pointer;font-weight:600;padding:2px 0}
.mention-list{margin-top:10px;font-size:13px;color:var(--muted)}
.mention-list code{background:#f1f5f9;padding:2px 7px;border-radius:6px;margin:2px;display:inline-block}

.warn{margin-top:10px;font-size:12.5px;color:var(--amber);background:var(--amber-soft);
  border:1px solid #fde68a;border-radius:9px;padding:8px 11px}
.note{margin-top:9px;font-size:12.5px;color:var(--muted);font-style:italic}

.unmatched{margin-top:14px;font-size:13.5px;color:var(--muted);background:#fff;
  border:1px dashed var(--line);border-radius:12px;padding:12px 15px}
.unmatched b{color:var(--ink)}

.summary{position:sticky;bottom:14px;margin-top:16px;background:var(--card);
  border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);
  padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.totals .total-line{display:flex;align-items:baseline;gap:10px;font-size:14px;color:var(--muted)}
.totals .total-line b{font-size:24px;color:var(--ink);font-weight:800}
.total-sub{font-size:12px;color:var(--muted);margin-top:2px}
.summary .submit{width:auto;padding:14px 30px}

/* receipt */
.receipt{margin-top:22px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.receipt h2{margin:0 0 4px;font-size:20px}
.receipt .rsub{color:var(--muted);font-size:14px;margin-bottom:16px}
.order-row{display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 0;border-bottom:1px solid var(--line)}
.order-row:last-child{border-bottom:0}
.order-row .oname{font-weight:600;font-size:14px}
.order-row .oid{font-size:12px;color:var(--muted)}
.ostatus{font-size:12px;font-weight:600;padding:5px 11px;border-radius:999px;
  background:var(--accent-soft);color:var(--accent-ink)}
.ostatus.sb{background:var(--amber-soft);color:var(--amber)}
.ostatus.err{background:#fef2f2;color:#b91c1c}
.receipt-actions{margin-top:18px;display:flex;gap:10px}
.receipt-actions button{flex:1}
.secondary-btn{border:1.5px solid var(--line);background:#fff;border-radius:12px;padding:13px;
  font:inherit;font-weight:600;color:var(--ink);cursor:pointer}
.secondary-btn:hover{border-color:var(--accent);color:var(--accent-ink)}

.foot{text-align:center;color:var(--muted);font-size:12.5px;padding:20px;max-width:900px;margin:0 auto}

@media(max-width:640px){
  .hero{padding:22px 18px}.hero h1{font-size:24px}
  .summary{flex-direction:column;align-items:stretch}.summary .submit{width:100%}
  .card-price{order:-1}
}