:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: #eff6ff;
  --ok: #15803d;
  --ok-soft: #f0fdf4;
  --warn: #b45309;
  --warn-soft: #fffbeb;
  --bad: #b91c1c;
  --bad-soft: #fef2f2;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.06);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --surface: #111827;
    --surface-2: #0f172a;
    --border: #1f2a3d;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-soft: #172554;
    --ok: #4ade80;
    --ok-soft: #052e16;
    --warn: #fbbf24;
    --warn-soft: #422006;
    --bad: #f87171;
    --bad-soft: #450a0a;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

h2 { margin: 0 0 6px; font-size: 16px; }
b { font-weight: 600; }

/* ---------- Header & tabs ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand small { display: block; color: var(--muted); font-size: 12px; }
.logo {
  width: 34px; height: 34px; border-radius: 9px;
  display: grid; place-items: center;
  background: var(--accent); color: #fff; font-weight: 800;
}
.brand-lg .logo { width: 42px; height: 42px; font-size: 18px; }
.stats { display: flex; gap: 8px; flex-wrap: wrap; margin-left: auto; }
.stat {
  padding: 4px 10px; border-radius: 999px; font-size: 12px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--muted);
}
.stat b { color: var(--text); }
.stat.bad { background: var(--bad-soft); color: var(--bad); border-color: transparent; }
.stat.bad b { color: var(--bad); }

.tabs {
  display: flex; gap: 4px; padding: 0 24px;
  background: var(--surface); border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tab {
  border: 0; background: none; color: var(--muted);
  padding: 12px 14px; font: inherit; font-weight: 600; cursor: pointer;
  border-bottom: 2px solid transparent; white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

main { max-width: 1280px; margin: 0 auto; padding: 24px; }
.panel { display: grid; grid-template-columns: minmax(0, 1fr); gap: 18px; }
.panel > * { min-width: 0; }

/* ---------- Cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 4px; }
.hint { color: var(--muted); margin: 4px 0 14px; }
.muted { color: var(--muted); }

/* ---------- Forms ---------- */
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.tight { gap: 8px; }
.row > input:not([type="number"]):not([type="checkbox"]) { flex: 1 1 260px; }
.stack { display: grid; gap: 12px; }
.stack label > span { display: block; font-weight: 600; margin-bottom: 6px; }
label.inline { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); }
label.check { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); }

input, select, textarea {
  font: inherit; color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  outline: none;
  width: 100%;
}
input[type="number"] { width: 90px; }
input[type="checkbox"] { width: auto; }
select { width: auto; }
textarea { resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.btn {
  font: inherit; font-weight: 600;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.danger { color: var(--bad); }
.btn.danger:hover { background: var(--bad-soft); border-color: var(--bad); }
.btn.ghost { background: transparent; }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn.block { width: 100%; padding: 11px; }
.btn:disabled { opacity: 0.6; cursor: wait; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); background: var(--surface-2); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.actions { text-align: right; white-space: nowrap; }
td.actions .btn + .btn { margin-left: 6px; }
td.mono, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13px; }
td.wrap { max-width: 360px; overflow-wrap: anywhere; }
td.empty { text-align: center; color: var(--muted); padding: 28px; }
.sub { display: block; color: var(--muted); font-size: 12px; }

.badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: 12px; font-weight: 600; white-space: nowrap;
  background: var(--surface-2); color: var(--muted);
}
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.bad { background: var(--bad-soft); color: var(--bad); }
.badge.info { background: var(--accent-soft); color: var(--accent); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--border); border-radius: 999px;
  padding: 4px 6px 4px 12px; background: var(--surface-2);
}
.chip.disabled { opacity: 0.65; padding-right: 12px; }

/* ---------- OTP ---------- */
.otp-results { display: grid; gap: 8px; margin-top: 8px; }
.otp-row {
  display: grid; grid-template-columns: minmax(220px, 1.2fr) 130px minmax(200px, 1fr);
  gap: 12px; align-items: center;
  padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border);
}
.otp-row.ok { background: var(--ok-soft); border-color: transparent; }
.otp-row.fail { background: var(--bad-soft); border-color: transparent; }
.otp-email { font-weight: 600; overflow-wrap: anywhere; }
.otp-code { font: 800 22px/1 ui-monospace, Menlo, Consolas, monospace; letter-spacing: 3px; color: var(--ok); }
.otp-meta { color: var(--muted); font-size: 12px; overflow-wrap: anywhere; }
.otp-row.fail .otp-meta { color: var(--bad); }

/* ---------- Test API ---------- */
.hint, .result-head span { overflow-wrap: anywhere; min-width: 0; }
.result { margin-top: 10px; border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.result-head { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; padding: 8px 12px; background: var(--surface-2); border-bottom: 1px solid var(--border); font-size: 13px; }
.result pre, pre.code {
  margin: 0; padding: 12px; overflow-x: auto; white-space: pre-wrap; overflow-wrap: anywhere;
  font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
pre.code { background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px; }
.spin { display: inline-block; width: 12px; height: 12px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Toast ---------- */
.toast {
  position: fixed; right: 20px; bottom: 20px; max-width: 480px; z-index: 20;
  padding: 12px 16px; border-radius: 10px;
  background: var(--text); color: var(--bg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}
.toast.error { background: var(--bad); color: #fff; }
.toast.success { background: var(--ok); color: #fff; }

/* ---------- Login ---------- */
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card {
  width: 100%; max-width: 380px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; box-shadow: var(--shadow);
  padding: 28px; display: grid; gap: 18px;
}
.alert { margin: 0; padding: 10px 12px; border-radius: 8px; background: var(--bad-soft); color: var(--bad); }

@media (max-width: 720px) {
  .topbar { flex-wrap: wrap; padding: 12px 16px; }
  .stats { order: 3; width: 100%; margin-left: 0; }
  .tabs { padding: 0 8px; }
  main { padding: 16px; }
  .otp-row { grid-template-columns: 1fr; }
}