:root {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent-dim: #1f6feb;
  --green: #3fb950;
  --orange: #d2991d;
  --red: #f85149;
  --radius: 8px;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--border);
}
header h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.5px; }
header .subtitle { color: var(--muted); margin-top: 4px; font-size: 0.95rem; }

main { flex: 1; padding: 40px 0 60px; }

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.tool-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 150ms, transform 150ms;
  position: relative;
}
.tool-card:hover { border-color: var(--accent-dim); transform: translateY(-1px); }
.tool-card h2 { font-size: 1.1rem; font-weight: 600; margin: 8px 0 4px; }
.tool-card p { color: var(--muted); font-size: 0.875rem; line-height: 1.5; }
.tool-icon { font-size: 1.75rem; display: block; }

.tool-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.tool-tag.ready { background: rgba(63, 185, 80, 0.15); color: var(--green); }
.tool-tag.wip { background: rgba(210, 153, 29, 0.15); color: var(--orange); }
.tool-tag.guide { background: rgba(88, 166, 255, 0.12); color: var(--accent); }

/* Tool pages */
.tool-header { margin-bottom: 32px; }
.tool-header h1 { font-size: 1.75rem; margin-bottom: 4px; }
.tool-header p { color: var(--muted); }
.back-link { color: var(--accent); text-decoration: none; font-size: 0.875rem; display: inline-block; margin-bottom: 16px; }
.back-link:hover { text-decoration: underline; }

.input-group {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
}
.input-group input {
  flex: 1;
  padding: 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
  font-family: var(--font-mono);
  outline: none;
  transition: border-color 150ms;
}
.input-group input:focus { border-color: var(--accent); }
.input-group button {
  padding: 10px 24px;
  background: var(--accent-dim);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 150ms;
  white-space: nowrap;
}
.input-group button:hover { background: var(--accent); }
.input-group button:disabled { opacity: 0.5; cursor: not-allowed; }

/* Record type pills */
.record-types {
  display: flex;
  gap: 6px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.record-type {
  padding: 4px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--muted);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 150ms;
  font-weight: 500;
}
.record-type:hover { border-color: var(--muted); color: var(--text); }
.record-type.active { border-color: var(--accent); color: var(--accent); background: rgba(88, 166, 255, 0.1); }

/* Result display */
.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.result-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.result-header h3 { font-size: 0.95rem; font-weight: 600; }
.result-time { color: var(--muted); font-size: 0.8rem; }
.result-table {
  width: 100%;
  border-collapse: collapse;
}
.result-table th {
  text-align: left;
  padding: 8px 16px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
}
.result-table td {
  padding: 8px 16px;
  font-size: 0.875rem;
  font-family: var(--font-mono);
  border-bottom: 1px solid rgba(48, 54, 61, 0.5);
  word-break: break-all;
}
.result-table tr:last-child td { border-bottom: none; }

/* WHOIS result */
.whois-output {
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}
.whois-field { margin-bottom: 12px; }
.whois-field .label { color: var(--muted); font-size: 0.8rem; font-weight: 600; text-transform: uppercase; margin-bottom: 2px; }
.whois-field .value { font-family: var(--font-mono); font-size: 0.9rem; }

/* Error / loading states */
.error-msg {
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid rgba(248, 81, 73, 0.25);
  color: var(--red);
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  margin-bottom: 16px;
}
.loading {
  text-align: center;
  padding: 40px;
  color: var(--muted);
}
.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin-bottom: 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--muted);
}
.empty-state p { font-size: 0.9rem; }

/* Status badges for email-dns-checker */
.status-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
}
.status-ok { background: rgba(63, 185, 80, 0.15); color: var(--green); }
.status-warn { background: rgba(210, 153, 29, 0.15); color: var(--orange); }
.status-fail { background: rgba(248, 81, 73, 0.15); color: var(--red); }

/* Info section */
.info-section {
  margin-top: 40px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.info-section h2 { font-size: 1.3rem; margin-bottom: 12px; }
.info-section h3 { font-size: 1rem; margin: 16px 0 8px; color: var(--accent); }
.info-section ul { padding-left: 20px; margin: 8px 0; }
.info-section li { margin-bottom: 6px; font-size: 0.9rem; }
.info-section p { margin-bottom: 8px; font-size: 0.9rem; color: var(--muted); }
.info-section code {
  background: rgba(88, 166, 255, 0.12);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  color: var(--accent);
}

/* Records guide items */
.records-guide { display: flex; flex-direction: column; gap: 16px; }
.guide-item strong { display: block; margin-bottom: 4px; color: var(--text); }
.guide-item p { margin: 0; }

.record-data { word-break: break-all; font-family: var(--font-mono); font-size: 0.85em; max-width: 400px; }

footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}
footer .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* DNSSEC checker */
.dnssec-status { padding: 16px; border-radius: var(--radius); margin-bottom: 16px; }
.dnssec-status h4 { font-size: 1.1rem; margin-bottom: 4px; }
.dnssec-status p { font-size: 0.85rem; opacity: 0.9; }
.dnssec-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; margin-bottom: 16px; }
.dnssec-card { background: rgba(255,255,255,0.03); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; }
.dnssec-card-header { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; font-weight: 600; font-size: 0.9rem; }
.dnssec-indicator { font-size: 0.85rem; }
.dnssec-count { margin-left: auto; font-size: 0.75rem; color: var(--muted); font-weight: 400; }
.dnssec-card p { font-size: 0.8rem; color: var(--muted); margin: 0; }

/* Blacklist results */
.row-warn td { color: var(--orange); }
.status-cell-ok { color: var(--green) !important; }
.truncate { max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.note { font-size: 0.8rem; color: var(--muted); margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }

@media (max-width: 600px) {
  .container { padding: 0 16px; }
  header { padding: 32px 0 24px; }
  header h1 { font-size: 1.5rem; }
  .tool-grid { grid-template-columns: 1fr; }
  .input-group { flex-direction: column; }
  .record-types { gap: 4px; }
  .record-type { font-size: 0.75rem; padding: 3px 10px; }
}