:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #16181d;
  --muted: #646a76;
  --border: #e2e5ea;
  --accent: #2f6bff;
  --accent-text: #ffffff;
  --valid: #12805c;
  --valid-bg: #e3f6ee;
  --warn: #9a6400;
  --warn-bg: #fff3d6;
  --bad: #b42335;
  --bad-bg: #fde7ea;
  --neutral-bg: #eef0f3;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a20;
    --text: #e8eaee;
    --muted: #9aa1ad;
    --border: #2a2f38;
    --accent: #5b8cff;
    --valid: #4cd29b;
    --valid-bg: #11291f;
    --warn: #f2c14e;
    --warn-bg: #2d2412;
    --bad: #ff7b8a;
    --bad-bg: #321419;
    --neutral-bg: #232832;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.hidden { display: none !important; }
code { background: var(--neutral-bg); padding: 1px 5px; border-radius: 4px; font-size: 12px; }
a { color: var(--accent); }

.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 24px; background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 5;
}
.brand { font-weight: 700; font-size: 16px; }
.health { display: flex; gap: 8px; flex-wrap: wrap; flex: 1; }
.pill {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 500;
  background: var(--neutral-bg); color: var(--muted); white-space: nowrap;
}
.pill.ok { background: var(--valid-bg); color: var(--valid); }
.pill.warn { background: var(--warn-bg); color: var(--warn); }
.pill.bad { background: var(--bad-bg); color: var(--bad); }

.tabs {
  display: flex; gap: 4px; padding: 12px 24px 0; overflow-x: auto;
  border-bottom: 1px solid var(--border); background: var(--surface);
}
.tabs button {
  border: 0; background: none; color: var(--muted); padding: 8px 14px; cursor: pointer;
  font: inherit; font-weight: 500; border-bottom: 2px solid transparent; white-space: nowrap;
}
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); }

main { max-width: 1200px; margin: 0 auto; padding: 24px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; box-shadow: var(--shadow); margin-bottom: 18px;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: end; }
.span2 { grid-column: span 2; }
label { display: flex; flex-direction: column; gap: 4px; font-weight: 500; font-size: 13px; }
label.check { flex-direction: row; align-items: center; gap: 8px; font-weight: 400; }
input, select {
  font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; width: 100%;
}
input[type=checkbox] { width: auto; }
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
fieldset.roles {
  border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px;
  display: flex; flex-wrap: wrap; gap: 8px 18px;
}
fieldset.roles legend { font-weight: 500; font-size: 13px; padding: 0 4px; }
fieldset.roles label { flex-direction: row; align-items: center; gap: 6px; font-weight: 400; }
fieldset.roles label.custom { flex-direction: row; flex: 1 1 260px; align-items: center; }
fieldset.roles label.custom input { flex: 1; }

button { font: inherit; cursor: pointer; border-radius: 8px; padding: 9px 16px; border: 1px solid var(--border); background: var(--surface); color: var(--text); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button.primary:disabled { opacity: .6; cursor: progress; }
button.ghost { background: none; }
button.small, .small { padding: 4px 10px; font-size: 12px; }
.muted { color: var(--muted); }
.small-text { font-size: 13px; }
.error { color: var(--bad); }

.summary { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: center; }
.summary .k { color: var(--muted); font-size: 12px; display: block; }
.summary .v { font-weight: 600; }
.note { margin-top: 10px; padding: 8px 12px; border-radius: 8px; background: var(--warn-bg); color: var(--warn); font-size: 13px; }

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
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; color: var(--muted); font-weight: 600; background: var(--bg); position: sticky; top: 0; }
tr:last-child td { border-bottom: 0; }
td .sub { color: var(--muted); font-size: 12px; }
.email { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 13px; }
.copy { border: 0; background: none; padding: 0 4px; color: var(--muted); }
.copy:hover { color: var(--accent); }

.status { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; white-space: nowrap; }
.status.valid, .status.found { background: var(--valid-bg); color: var(--valid); }
.status.likely, .status.catch_all { background: var(--warn-bg); color: var(--warn); }
.status.unverified, .status.unknown, .status.skipped { background: var(--neutral-bg); color: var(--muted); }
.actions { display: flex; gap: 4px; margin-top: 6px; flex-wrap: wrap; }
.actions button { padding: 2px 8px; font-size: 12px; }
.status.not_found, .status.invalid, .status.no_mail { background: var(--bad-bg); color: var(--bad); }
.conf { font-size: 12px; color: var(--muted); }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.toolbar select, .toolbar input { width: auto; flex: 1 1 160px; min-width: 0; max-width: 100%; }
.progress { height: 8px; background: var(--neutral-bg); border-radius: 999px; overflow: hidden; margin: 8px 0; }
.progress > div { height: 100%; background: var(--accent); transition: width .4s; }
.log { font-family: ui-monospace, Consolas, monospace; font-size: 12px; max-height: 220px; overflow: auto; color: var(--muted); white-space: pre-wrap; }
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -2px; margin-right: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }

.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: 100%; max-width: 340px; display: flex; flex-direction: column; gap: 10px; }
.login-card h1 { margin: 0; font-size: 22px; }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 8px 16px; border-radius: 8px; font-size: 13px; z-index: 20;
}

@media (max-width: 720px) {
  .form-grid { grid-template-columns: 1fr; }
  .span2 { grid-column: span 1; }
  main { padding: 16px; }
  .topbar { padding: 10px 16px; flex-wrap: wrap; }
  .tabs { padding: 8px 16px 0; }
}