:root {
  --ink: #1a1a2e;
  --muted: #6b7280;
  --bg: #f7f7fb;
  --card: #ffffff;
  --accent: #2563eb;
  --accent-ink: #ffffff;
  --ok: #16a34a;
  --warn: #d97706;
  --err: #dc2626;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, "Segoe UI", "Noto Sans TC", sans-serif;
  line-height: 1.6;
}

.wrap {
  max-width: 480px;
  margin: 0 auto;
  padding: 20px 16px 40px;
  min-height: 100vh;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  margin-bottom: 16px;
}

h1 { font-size: 1.4rem; margin: 8px 0 4px; }
h2 { font-size: 1.1rem; margin: 0 0 12px; }
p.lead { color: var(--muted); margin-top: 0; }

label { display: block; font-weight: 600; margin: 16px 0 6px; font-size: 0.95rem; }
input[type="text"], input[type="password"] {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fafafa;
}
input:focus { outline: 2px solid var(--accent); background: #fff; }

button, .btn {
  display: block;
  width: 100%;
  padding: 16px;
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: var(--accent-ink);
  margin-top: 20px;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}
button:active, .btn:active { opacity: 0.85; }

.btn-secondary { background: #e5e7eb; color: var(--ink); }

.steps { display: flex; gap: 6px; margin-bottom: 20px; }
.steps .dot { flex: 1; height: 4px; border-radius: 2px; background: var(--border); }
.steps .dot.done { background: var(--ok); }
.steps .dot.current { background: var(--accent); }

.alert { padding: 12px 14px; border-radius: 10px; margin: 12px 0; font-size: 0.95rem; }
.alert-error { background: #fef2f2; color: var(--err); border: 1px solid #fecaca; }
.alert-warn { background: #fffbeb; color: var(--warn); border: 1px solid #fde68a; }
.alert-ok { background: #f0fdf4; color: var(--ok); border: 1px solid #bbf7d0; }

.checklist { list-style: none; padding: 0; margin: 0; }
.checklist li { display: flex; align-items: flex-start; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.checklist li:last-child { border-bottom: none; }
.badge { flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.8rem; color: #fff; }
.badge.PASS { background: var(--ok); }
.badge.FAIL { background: var(--err); }
.badge.SKIPPED { background: var(--muted); }
.item-name { font-weight: 600; }
.item-detail { color: var(--muted); font-size: 0.85rem; }

.eli5 { background: #eff6ff; border-radius: 12px; padding: 14px; font-size: 0.92rem; margin-bottom: 16px; }
.eli5 ol { margin: 6px 0 0; padding-left: 20px; }

footer.tips { text-align: center; color: var(--muted); font-size: 0.8rem; margin-top: 24px; }