:root {
  --bg: #f7f7f5;
  --card: #ffffff;
  --ink: #1a1a1a;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
  --accent-ink: #ffffff;
  --good: #047857;
  --warn: #b45309;
  --bad: #b91c1c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
}

header {
  max-width: 920px;
  margin: 40px auto 24px;
  padding: 0 24px;
}

header h1 {
  font-size: 28px;
  margin: 0 0 6px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

header .sub {
  color: var(--muted);
  margin: 0;
}

main {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 24px 48px;
}

form {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
}

label.full {
  grid-column: 1 / -1;
}

label em {
  font-style: normal;
  color: var(--muted);
  font-weight: 400;
}

input, select, button {
  font: inherit;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  outline: none;
}

input:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

button {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  font-weight: 600;
  cursor: pointer;
  padding: 12px 16px;
  transition: filter 0.15s;
}

button:hover { filter: brightness(0.92); }
button:disabled { opacity: 0.6; cursor: not-allowed; }

#status {
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: 10px;
  background: #fffbe6;
  border: 1px solid #fde68a;
  font-size: 14px;
}

#status.error {
  background: #fef2f2;
  border-color: #fecaca;
  color: var(--bad);
}

#results {
  margin-top: 28px;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.results-header h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

#csvBtn {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 8px 14px;
  font-weight: 500;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  background: #fafafa;
  font-weight: 600;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

tbody tr:last-child td { border-bottom: none; }

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.tag.good { background: #ecfdf5; color: var(--good); }
.tag.warn { background: #fffbeb; color: var(--warn); }
.tag.bad  { background: #fef2f2; color: var(--bad); }
.tag.info { background: #eff6ff; color: var(--accent); }

td.domain a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
td.domain a:hover { text-decoration: underline; }

.desc {
  color: var(--muted);
  font-size: 13px;
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hint {
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

footer {
  max-width: 920px;
  margin: 0 auto;
  padding: 24px;
  color: var(--muted);
  text-align: center;
}

.extra-tools {
  margin-top: 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 20px;
}
.extra-tools summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  color: var(--ink);
  user-select: none;
}
.extra-tools[open] summary { margin-bottom: 16px; }
.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.tool-card {
  padding: 16px;
  background: var(--bg);
  border-radius: 10px;
  border: 1px solid var(--line);
}
.tool-card h3 {
  margin: 0 0 6px;
  font-size: 14px;
  font-weight: 600;
}
.tool-card p {
  margin: 0 0 10px;
  font-size: 13px;
  color: var(--muted);
}
.inline-form {
  display: flex;
  gap: 8px;
}
.inline-form input {
  flex: 1;
  font-size: 13px;
}
.inline-form button {
  font-size: 13px;
  padding: 8px 14px;
}

.row-action {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--line);
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 6px;
}
.row-action:hover { background: var(--bg); }

.context-row {
  background: #f8fafc;
  font-size: 13px;
}
.context-row td { padding: 10px 16px 14px; }

@media (max-width: 640px) {
  .row { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: 1fr; }
}