/* ---- Design tokens ---- */
:root {
  --bg:           #0a0a0a;
  --bg-card:      #111111;
  --bg-row-alt:   #191919;
  --bg-input:     #161616;
  --bg-hover:     #1e1e1e;
  --accent:       #e8e8e8;
  --accent-hover: #ffffff;
  --accent-dim:   rgba(232,232,232,0.08);
  --text:         #e0e0e0;
  --text-muted:   #888888;
  --text-faint:   #444444;
  --green:        #22c55e;
  --green-dim:    #22c55e14;
  --red:          #ef4444;
  --red-dim:      #ef444414;
  --yellow:       #eab308;
  --yellow-dim:   #eab30814;
  --border:       #1f1f1f;
  --border-light: #2a2a2a;
  --radius:       10px;
  --radius-sm:    6px;
  --font:         -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono:    'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  --shadow:       0 2px 16px #00000060;
}

/* ---- Reset & base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* ---- Header ---- */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  margin-bottom: 32px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}
.logo svg { color: var(--accent); flex-shrink: 0; }

/* ---- Tool navigation ---- */
.tool-nav {
  display: flex;
  gap: 4px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}
.tool-tab {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  padding: 8px 16px;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.15s, border-color 0.15s;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}
.tool-tab:hover { color: var(--text); }
.tool-tab.active { color: var(--accent); border-bottom-color: var(--accent-hover); }

/* ---- Search bar ---- */
.search-form { margin-bottom: 28px; }
.search-bar {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 0 4px 0 14px;
  gap: 8px;
  transition: border-color 0.15s;
}
.search-bar:focus-within { border-color: var(--accent); }
.search-icon { color: var(--text-faint); flex-shrink: 0; }
.search-bar input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  padding: 12px 0;
  min-width: 0;
}
.search-bar input::placeholder { color: var(--text-faint); font-family: var(--font); }
.search-bar.two-input { gap: 0; padding: 0; }
.search-bar.two-input input {
  padding: 12px 14px;
  border-right: 1px solid var(--border);
}
.search-bar.two-input input:first-child { border-left: none; }

.btn-primary {
  background: var(--accent);
  color: #0a0a0a;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 700;
  padding: 8px 18px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
  flex-shrink: 0;
  margin: 4px;
}
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 5px 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.btn-secondary:hover { color: var(--accent); border-color: var(--accent); }

/* ---- Loading & errors ---- */
.loading {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 20px 0;
}
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-light);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-box {
  background: var(--red-dim);
  border: 1px solid var(--red);
  border-radius: var(--radius-sm);
  color: var(--red);
  padding: 12px 16px;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

/* ---- Result cards ---- */
.result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

/* ---- Summary ---- */
#section-summary {
  padding: 20px 24px 16px;
}
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}
.summary-item {}
.summary-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  font-weight: 600;
  margin-bottom: 3px;
}
.summary-value {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 500;
}
.summary-value.mono { font-family: var(--font-mono); font-size: 0.85rem; }

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.02em;
}
.badge.green { background: var(--green-dim); color: var(--green); border: 1px solid #22c55e40; }
.badge.red   { background: var(--red-dim);   color: var(--red);   border: 1px solid #ef444440; }
.badge.yellow { background: var(--yellow-dim); color: var(--yellow); border: 1px solid #eab30840; }
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

/* ---- Collapsible sections ---- */
.section-header {
  width: 100%;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  text-align: left;
  transition: background 0.1s;
}
.section-header:hover { background: var(--bg-hover); }
.section-title { display: flex; align-items: center; gap: 8px; }
.chevron { color: var(--text-muted); transition: transform 0.2s; flex-shrink: 0; }
.collapsed .chevron { transform: rotate(-90deg); }
.section-body {
  border-top: 1px solid var(--border);
  overflow: hidden;
  transition: max-height 0.25s ease;
}
.collapsed .section-body { display: none; }

.count-badge {
  background: rgba(255,255,255,0.07);
  color: var(--text-muted);
  font-size: 0.72rem;
  padding: 1px 7px;
  border-radius: 10px;
  font-weight: 600;
}

/* ---- Tables ---- */
.records-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.records-table th {
  text-align: left;
  padding: 10px 20px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}
.records-table td {
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  word-break: break-all;
}
.records-table tr:last-child td { border-bottom: none; }
.records-table tr:nth-child(even) td { background: var(--bg-row-alt); }
.records-table .mono { font-family: var(--font-mono); font-size: 0.825rem; color: var(--text); }
.records-table .muted { color: var(--text-muted); }
.priority-badge {
  background: rgba(255,255,255,0.07);
  color: var(--text-muted);
  font-size: 0.7rem;
  padding: 1px 7px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-weight: 600;
  white-space: nowrap;
}

/* ---- Record type sub-sections ---- */
.record-type-section { }
.record-type-header {
  padding: 8px 20px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-faint);
  font-weight: 700;
  background: var(--bg-row-alt);
  border-bottom: 1px solid var(--border);
  border-top: 1px solid var(--border);
}
.record-type-section:first-child .record-type-header { border-top: none; }

/* ---- Raw record box with copy ---- */
.raw-record-box {
  position: relative;
  background: var(--bg-row-alt);
  border-radius: var(--radius-sm);
  padding: 12px 48px 12px 16px;
  margin: 0 20px 12px;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: var(--text);
  word-break: break-all;
  line-height: 1.5;
}
.raw-record-box:first-child { margin-top: 16px; }
.copy-btn {
  position: absolute;
  right: 8px;
  top: 8px;
  background: var(--bg-input);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px 9px;
  font-size: 0.7rem;
  font-family: var(--font);
  font-weight: 500;
  transition: color 0.15s, border-color 0.15s, background 0.15s, transform 0.1s;
  user-select: none;
}
.copy-btn:hover { color: var(--text); border-color: var(--text-muted); }
.copy-btn:active { transform: scale(0.92); }
.copy-btn.copied {
  color: #0a0a0a;
  background: var(--accent);
  border-color: var(--accent);
  animation: copy-flash 0.3s ease;
}
@keyframes copy-flash {
  0%   { transform: scale(0.92); }
  60%  { transform: scale(1.06); }
  100% { transform: scale(1); }
}

/* ---- Email section sub-labels ---- */
.email-subsection-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-faint);
  font-weight: 700;
  padding: 10px 20px 6px;
  border-bottom: 1px solid var(--border);
}
.email-subsection-label:not(:first-child) { border-top: 1px solid var(--border); margin-top: 4px; }

/* ---- DKIM section ---- */
.dkim-found-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.dkim-record {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}
.dkim-record:last-child { border-bottom: none; }
.dkim-selector-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
.dkim-selector-name {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent);
}
.dkim-tag {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.07);
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.dkim-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 8px;
}
.dkim-meta-item {}
.dkim-meta-label { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-faint); font-weight: 600; margin-bottom: 2px; }
.dkim-meta-value { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text); }
.dkim-no-records {
  padding: 14px 20px;
  color: var(--text-faint);
  font-size: 0.875rem;
}
.dkim-custom-lookup {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: var(--bg-row-alt);
}
.dkim-custom-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.dkim-custom-lookup input {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 6px 10px;
  outline: none;
  min-width: 0;
  transition: border-color 0.15s;
}
.dkim-custom-lookup input:focus { border-color: var(--accent); }
#dkim-custom-result {
  padding: 0 20px 4px;
  font-size: 0.875rem;
}
#dkim-custom-result:empty { display: none; }
.dkim-custom-hit { color: var(--green); padding: 10px 0; }
.dkim-custom-miss { color: var(--text-muted); padding: 10px 0; }

/* ---- SPF action buttons ---- */
.spf-actions {
  display: flex;
  gap: 8px;
  padding: 10px 20px 14px;
}

/* ---- DMARC parsed grid ---- */
.dmarc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  padding: 16px 20px;
}
.dmarc-item {}
.dmarc-key {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  font-weight: 600;
  margin-bottom: 2px;
}
.dmarc-val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
}
.dmarc-val.policy-reject  { color: var(--green); }
.dmarc-val.policy-quarantine { color: var(--yellow); }
.dmarc-val.policy-none    { color: var(--red); }

/* ---- WHOIS kv grid ---- */
.kv-grid {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 0;
}
.kv-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}
.kv-value {
  font-size: 0.875rem;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border);
  word-break: break-word;
}
.kv-label:last-of-type, .kv-value:last-of-type { border-bottom: none; }
.kv-value .mono { font-family: var(--font-mono); font-size: 0.825rem; }
.kv-value .status-tag {
  display: inline-block;
  background: var(--bg-row-alt);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  font-size: 0.75rem;
  padding: 1px 7px;
  margin: 2px 4px 2px 0;
  font-family: var(--font-mono);
}

/* ---- SPF Flatten ---- */
.spf-meta {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  padding: 20px 24px;
}
.spf-tree {
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.825rem;
}
.spf-tree ul { list-style: none; padding-left: 20px; border-left: 1px solid var(--border); margin-left: 4px; }
.spf-tree > ul { padding-left: 0; border-left: none; margin-left: 0; }
.spf-tree li { margin: 6px 0; }
.tree-node-mech {
  color: var(--accent);
  font-weight: 600;
}
.tree-node-ips {
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-left: 8px;
}
.ip-columns {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 6px;
  padding: 16px 20px;
}
.ip-chip {
  background: var(--bg-row-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 5px 10px;
  color: var(--text);
}
.ip-chip.v6 { color: var(--text-muted); }
.spf-limit-warn {
  background: var(--yellow-dim);
  border: 1px solid var(--yellow);
  color: var(--yellow);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 0.85rem;
  margin: 12px 20px;
}

/* ---- SPF Reverse result ---- */
.reverse-result {
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  margin-bottom: 12px;
}
.reverse-result.pass { background: var(--green-dim); border: 1px solid #22c55e40; }
.reverse-result.fail, .reverse-result.softfail { background: var(--red-dim); border: 1px solid #ef444440; }
.reverse-result.neutral, .reverse-result.none { background: var(--yellow-dim); border: 1px solid #eab30840; }
.reverse-result.permerror { background: var(--red-dim); border: 1px solid #ef444440; }
.result-verdict {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
  text-transform: uppercase;
}
.reverse-result.pass .result-verdict { color: var(--green); }
.reverse-result.fail .result-verdict,
.reverse-result.softfail .result-verdict,
.reverse-result.permerror .result-verdict { color: var(--red); }
.reverse-result.neutral .result-verdict,
.reverse-result.none .result-verdict { color: var(--yellow); }
.result-explanation { color: var(--text-muted); font-size: 0.9rem; line-height: 1.5; max-width: 540px; margin: 0 auto 16px; }
.result-detail { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted); }

/* ---- Utility ---- */
.hidden { display: none !important; }
.no-data { color: var(--text-faint); font-size: 0.875rem; padding: 16px 20px; }
.section-body.padded { padding: 16px 20px; }

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .summary-grid { grid-template-columns: 1fr 1fr; }
  .kv-grid { grid-template-columns: 1fr; }
  .kv-label { padding-bottom: 2px; border-bottom: none; }
  .search-bar.two-input { flex-direction: column; padding: 8px; gap: 6px; }
  .search-bar.two-input input { border-right: none; border-bottom: 1px solid var(--border); width: 100%; }
  .search-bar.two-input .btn-primary { width: 100%; margin: 0; border-radius: var(--radius-sm); }
  .records-table td, .records-table th { padding: 8px 12px; }
}