:root {
  --bg: #f6f8ff;
  --bg-soft: #eef2ff;
  --card: #ffffff;
  --text: #0d1530;
  --muted: #5b6b8a;
  --subtle: #8a98b3;
  --accent: #2563ff;
  --accent-hover: #1a52e6;
  --accent-soft: #e9efff;
  --border: #e6eaf3;
  --border-strong: #d6dcec;
  --code-bg: #f1f4fb;
  --ok: #16a34a;
  --ok-soft: #e7f7ee;
  --warn: #c98a00;
  --warn-soft: #fff5dd;
  --danger: #d92d20;
  --danger-soft: #fde8e6;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background:
    radial-gradient(700px 360px at 50% -10%, var(--bg-soft), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 15px/1.5 "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100%;
}

a { color: inherit; }

.wrap {
  min-height: 100vh;
  max-width: 420px;
  margin: 0 auto;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow:
    0 1px 2px rgba(15, 23, 42, 0.04),
    0 8px 28px rgba(15, 23, 42, 0.05);
}

.check-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}
.check-head h2 {
  margin: 0 0 2px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.check-head .dot {
  margin-top: 6px;
  flex: 0 0 auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.badge-ok { color: var(--ok); background: var(--ok-soft); border-color: #cdebd6; }
.badge .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--subtle);
  display: inline-block;
}
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--subtle);
  display: inline-block;
}
.dot-ok      { background: var(--ok) !important; }
.dot-running {
  background: var(--accent) !important;
  box-shadow: 0 0 0 4px rgba(37, 99, 255, 0.16);
  animation: pulse 1.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: scale(0.92); }
  50%      { opacity: 1;   transform: scale(1.08); }
}

.result-card h2 { margin: 12px 0 6px; font-size: 18px; letter-spacing: -0.01em; }

.summary { color: var(--muted); margin: 0; font-size: 13px; }
.result-card .summary { margin-bottom: 16px; }

.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 0 0 16px;
}
.fact {
  margin: 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.fact dt {
  color: var(--subtle);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
  font-weight: 600;
}
.fact dd { margin: 0; font-size: 13px; font-weight: 600; color: var(--text); }
.ok { color: var(--ok); }

.links { display: flex; flex-wrap: wrap; gap: 8px; }

/* Compatibility check panel */
.check-card { transition: opacity .25s ease; }
.check-card.fade-out { opacity: 0; pointer-events: none; }

.checklist {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.check {
  display: grid;
  grid-template-columns: 18px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  font-size: 13px;
  transition: background .2s, border-color .2s;
}
.check[data-state="ok"]   { background: var(--ok-soft);    border-color: #cdebd6; }
.check[data-state="warn"] { background: var(--warn-soft);  border-color: #f4dfa8; }
.check[data-state="fail"] { background: var(--danger-soft); border-color: #f5c6c2; }

.check-icon {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--border-strong);
  position: relative;
  display: inline-block;
  background: #fff;
}
.check[data-state="running"] .check-icon {
  border-color: var(--accent-soft);
  border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
.check[data-state="ok"] .check-icon {
  background: var(--ok);
  border-color: var(--ok);
}
.check[data-state="ok"] .check-icon::after {
  content: "";
  position: absolute;
  left: 2px;
  top: -1px;
  width: 4px;
  height: 7px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.check[data-state="warn"] .check-icon { background: var(--warn); border-color: var(--warn); }
.check[data-state="fail"] .check-icon { background: var(--danger); border-color: var(--danger); }

@keyframes spin { to { transform: rotate(360deg); } }

.check-label { color: var(--text); font-weight: 500; }
.check-status { color: var(--subtle); font-size: 12px; font-weight: 500; }
.check[data-state="ok"]   .check-status { color: var(--ok); }
.check[data-state="warn"] .check-status { color: var(--warn); }
.check[data-state="fail"] .check-status { color: var(--danger); }

.progress {
  height: 4px;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  overflow: hidden;
  margin: 0 0 4px;
}
.progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), #6f96ff);
  transition: width .25s ease;
}

.fade-in { animation: fadeIn .35s ease both; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.error-box {
  margin: 14px 0 0;
  padding: 14px;
  border-radius: 12px;
  background: var(--danger-soft);
  border: 1px solid #f5c6c2;
  animation: fadeIn .35s ease both;
}
.error-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}
.error-icon {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--danger);
  color: #fff;
  font-weight: 700;
  font-size: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 18px;
}
.error-title {
  margin: 0;
  color: var(--danger);
  font-weight: 600;
  font-size: 13px;
}
.error-text {
  margin: 0 0 12px;
  color: var(--text);
  font-size: 13px;
}

.steps { padding-left: 18px; margin: 0 0 16px; color: var(--text); font-size: 13px; }
.steps li { margin-bottom: 6px; }
.steps code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 5px;
  font-size: 12px;
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 14px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
  transition: background .15s ease, color .15s ease, border-color .15s ease, transform .05s ease, box-shadow .15s ease;
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--text);
  font-family: inherit;
}
.btn:hover { background: var(--bg-soft); }
.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 14px rgba(37, 99, 255, 0.22);
}
.btn.primary:hover { background: var(--accent-hover); }
.btn:active { transform: translateY(1px); }

.hint { color: var(--subtle); font-size: 12px; margin: 12px 0 0; }

.foot {
  text-align: center;
  color: var(--subtle);
  font-size: 11px;
  margin: 4px 0 0;
}

@media (max-width: 480px) {
  .wrap { padding: 16px; }
  .card { padding: 16px; border-radius: 14px; }
  .facts { grid-template-columns: 1fr; }
}