/* ------------------------------------------------------------------ */
/* CSS custom properties -- Phase 4 brand pass                         */
/* OD-5: exact hex values and typefaces should be confirmed from the   */
/* Sonoma brand guide. Current palette approximates the PRD spec:      */
/* greens and warm off-whites, calibrated to WCAG AA contrast ratios.  */
/* --text-faint darkened from #a09d98 to meet 4.5:1 on --bg.          */
/* ------------------------------------------------------------------ */
:root {
  --bg:            #f7f5f0;
  --surface:       #ffffff;
  --border:        #e0dbd2;
  --border-light:  #ede9e2;
  --text:          #191916;
  --text-muted:    #6b6860;
  --text-faint:    #706d68; /* WCAG AA: 4.82:1 on --bg (was #a09d98 at 2.46:1) */

  --green:         #2d6a4f;
  --green-hover:   #1b4332;
  --green-tint:    #d8f3dc;
  --green-tint2:   #b7e4c7;

  --red:           #b91c1c;
  --red-tint:      #fee2e2;

  --amber:         #92400e;
  --amber-tint:    #fef3c7;

  /* OD-5: replace with brand guide typefaces */
  --mono:  'SF Mono', 'Fira Code', 'Consolas', 'Liberation Mono', monospace;
  --sans:  system-ui, -apple-system, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --r:     7px;
  --sh:    0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.04);
}

/* ------------------------------------------------------------------ */
/* Reset                                                                */
/* ------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;    /* fallback for Safari < 15.4 */
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ------------------------------------------------------------------ */
/* Accessibility utilities                                              */
/* ------------------------------------------------------------------ */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute;
  top: -60px;
  left: 1rem;
  padding: .5rem 1.125rem;
  background: var(--green);
  color: #fff;
  font-size: .875rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 var(--r) var(--r);
  z-index: 200;
  transition: top .12s ease;
}
.skip-link:focus { top: 0; outline: 2px solid var(--green-hover); outline-offset: 2px; }

/* ------------------------------------------------------------------ */
/* Header                                                               */
/* ------------------------------------------------------------------ */
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  padding: .875rem 1.5rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .625rem;
  text-decoration: none;
  color: var(--text);
}
.brand-mark {
  width: 26px; height: 26px;
  color: var(--green);
  flex-shrink: 0;
}
.brand-name {
  font-size: .9375rem;
  font-weight: 600;
  letter-spacing: -.01em;
}

/* ------------------------------------------------------------------ */
/* Main content                                                         */
/* ------------------------------------------------------------------ */
main {
  flex: 1;
  padding: 2.5rem 1.5rem 3rem;
  width: 100%;
}

/* ------------------------------------------------------------------ */
/* Hero / search area                                                   */
/* ------------------------------------------------------------------ */
.hero { margin-bottom: 2.5rem; }
.hero h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: .375rem;
}
.hero .tagline {
  color: var(--text-muted);
  font-size: .9375rem;
  margin-bottom: 1.5rem;
  max-width: 540px;
}

/* Form layout */
.lookup-form { width: 100%; }
.input-row {
  display: flex;
  gap: .5rem;
  align-items: stretch;
  flex-wrap: wrap;
}

#domain-input {
  flex: 1 1 240px;
  min-width: 0;
  padding: .625rem .875rem;
  font-size: 1rem;
  font-family: var(--mono);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  outline: none;
  transition: border-color .14s;
}
#domain-input::placeholder { font-family: var(--sans); color: var(--text-faint); }
#domain-input:focus { border-color: var(--green); }
#domain-input:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }

.selects { display: flex; gap: .5rem; }

select {
  padding: .625rem .75rem;
  font-size: .9375rem;
  font-family: var(--sans);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  cursor: pointer;
  outline: none;
  transition: border-color .14s;
  white-space: nowrap;
}
select:focus { border-color: var(--green); }
select:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }

button[type="submit"] {
  padding: .625rem 1.25rem;
  font-size: .9375rem;
  font-weight: 600;
  font-family: var(--sans);
  background: var(--green);
  color: #fff;
  border: none;
  border-radius: var(--r);
  cursor: pointer;
  white-space: nowrap;
  transition: background .14s;
}
button[type="submit"]:hover  { background: var(--green-hover); }
button[type="submit"]:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

/* ------------------------------------------------------------------ */
/* Results section                                                      */
/* ------------------------------------------------------------------ */
.results { min-height: 2rem; }

/* Loading */
.state-loading {
  display: flex;
  align-items: center;
  gap: .75rem;
  color: var(--text-muted);
  font-size: .9375rem;
  padding: 2rem 0;
}
.spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin .65s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Error banner */
.state-error {
  background: var(--red-tint);
  border: 1px solid #fca5a5;
  border-radius: var(--r);
  padding: .875rem 1.125rem;
  color: var(--red);
  font-size: .9375rem;
  display: flex;
  align-items: flex-start;
  gap: .5rem;
}
.state-error::before {
  content: '!';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px; height: 18px;
  background: var(--red);
  color: #fff;
  border-radius: 50%;
  font-size: .6875rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* NXDOMAIN banner */
.state-nxdomain {
  background: var(--amber-tint);
  border: 1px solid #fcd34d;
  border-radius: var(--r);
  padding: .875rem 1.125rem;
  color: var(--amber);
  font-size: .9375rem;
}

/* Results header */
.results-header { margin-bottom: 1.25rem; }
.results-header h2 { font-size: 1.125rem; font-weight: 600; margin-bottom: .25rem; }
.results-meta { font-size: .8125rem; color: var(--text-muted); }
.results-meta code {
  font-family: var(--mono);
  font-size: .8125rem;
  background: var(--green-tint);
  padding: 1px 4px;
  border-radius: 3px;
}

/* Agreement / disagreement badge */
.badge-agree {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 99px;
  background: var(--green-tint);
  color: var(--green);
  margin-left: .5rem;
  vertical-align: middle;
}
.badge-disagree {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 99px;
  background: var(--red-tint);
  color: var(--red);
  margin-left: .5rem;
  vertical-align: middle;
}

/* Comparison grid (Phase 2 will expand this) */
.records-container { display: grid; gap: .875rem; }

/* ------------------------------------------------------------------ */
/* Record cards                                                         */
/* ------------------------------------------------------------------ */
.record-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--sh);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  gap: .625rem;
  padding: .625rem 1rem;
  background: var(--green-tint);
  border-bottom: 1px solid var(--border-light);
}
.card-type {
  font-family: var(--mono);
  font-size: .8125rem;
  font-weight: 700;
  color: var(--green);
  letter-spacing: .03em;
}
.card-resolver {
  font-size: .75rem;
  color: var(--text-muted);
}
.card-dnssec {
  font-size: .6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--green);
  color: #fff;
}
.card-latency {
  margin-left: auto;
  font-size: .75rem;
  font-family: var(--mono);
  color: var(--text-faint);
}

.card-body { padding: .875rem 1rem; }

.card-empty  { color: var(--text-muted); font-size: .9rem; font-style: italic; }
.card-status-error { color: var(--red); font-size: .9rem; }

/* Record table */
.record-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
  table-layout: fixed;
}
.record-table th {
  text-align: left;
  font-size: .6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  padding: 0 .5rem .5rem 0;
  border-bottom: 1px solid var(--border-light);
}
.record-table td {
  padding: .375rem .5rem .375rem 0;
  vertical-align: top;
  border-bottom: 1px solid var(--border-light);
}
.record-table tr:last-child td { border-bottom: none; }

.col-name { width: 30%; }
.col-data { width: 55%; }
.col-ttl  { width: 15%; }

.record-table .col-name td,
.record-table .col-data td {
  font-family: var(--mono);
  word-break: break-all;
}
td.name { font-size: .8125rem; color: var(--text-muted); }
td.data { font-size: .875rem; }
td.ttl  { font-family: var(--mono); font-size: .8rem; color: var(--text-faint); white-space: nowrap; }

/* Disagreement highlight on a resolver column row */
.disagree-row { background: var(--red-tint) !important; }

/* ------------------------------------------------------------------ */
/* Comparison layout (multi-resolver view)                             */
/* ------------------------------------------------------------------ */
.comparison-grid {
  display: grid;
  gap: .875rem;
}
.comparison-type-label {
  font-family: var(--mono);
  font-size: .8125rem;
  font-weight: 700;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: .375rem;
  border-left: 3px solid var(--green-tint2);
  padding-left: .5rem;
}
.comparison-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: .625rem;
}

/* ------------------------------------------------------------------ */
/* Footer                                                               */
/* ------------------------------------------------------------------ */
footer {
  border-top: 1px solid var(--border);
  padding: 1.375rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: .8125rem;
  line-height: 1.8;
}
footer a { color: var(--green); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ------------------------------------------------------------------ */
/* Advanced toggle (Phase 2)                                           */
/* ------------------------------------------------------------------ */
.form-options { margin-top: .625rem; }

.advanced-toggle {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  cursor: pointer;
  font-size: .875rem;
  color: var(--text-muted);
  user-select: none;
}
.advanced-toggle input[type="checkbox"] {
  width: 14px; height: 14px;
  accent-color: var(--green);
  cursor: pointer;
}
.advanced-toggle:hover { color: var(--text); }
.advanced-hint {
  font-size: .8rem;
  color: var(--text-faint);
}

/* ------------------------------------------------------------------ */
/* DNSSEC summary panel (Phase 2)                                      */
/* ------------------------------------------------------------------ */
.dnssec-panel {
  display: flex;
  align-items: flex-start;
  gap: .625rem;
  padding: .75rem 1rem;
  border-radius: var(--r);
  font-size: .875rem;
  margin-bottom: 1rem;
  border: 1px solid;
}
.dnssec-panel.dnssec-validated {
  background: var(--green-tint);
  border-color: var(--green-tint2);
  color: var(--green);
}
.dnssec-panel.dnssec-none {
  background: var(--bg);
  border-color: var(--border);
  color: var(--text-muted);
}
.dnssec-panel.dnssec-bogus {
  background: var(--red-tint);
  border-color: #fca5a5;
  color: var(--red);
}
.dnssec-icon {
  flex-shrink: 0;
  width: 16px; height: 16px;
  margin-top: 1px;
}
.dnssec-body strong { display: block; font-weight: 600; margin-bottom: .2rem; }
.dnssec-body .dnssec-caveat {
  font-size: .8rem;
  opacity: .75;
  margin-top: .25rem;
}

/* ------------------------------------------------------------------ */
/* Disagreeing resolver card highlight (Phase 2)                       */
/* ------------------------------------------------------------------ */
.card-disagree {
  border-color: #fca5a5 !important;
  box-shadow: 0 0 0 2px rgba(185,28,28,.12) !important;
}
.card-disagree .card-header {
  background: var(--red-tint);
}
.disagree-label {
  margin-left: auto;
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--red);
}

/* ------------------------------------------------------------------ */
/* TTL skew note in comparison (Phase 2)                               */
/* ------------------------------------------------------------------ */
.ttl-skew-note {
  font-size: .8rem;
  color: var(--amber);
  background: var(--amber-tint);
  border: 1px solid #fcd34d;
  border-radius: 4px;
  padding: 2px 6px;
  margin-left: .5rem;
}

/* ------------------------------------------------------------------ */
/* Private range label (Phase 2)                                       */
/* ------------------------------------------------------------------ */
.private-range-banner {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .625rem 1rem;
  background: var(--amber-tint);
  border: 1px solid #fcd34d;
  border-radius: var(--r);
  color: var(--amber);
  font-size: .875rem;
  margin-bottom: 1rem;
}
.private-range-banner strong { font-weight: 700; }

/* ------------------------------------------------------------------ */
/* Raw dig-style output (Phase 2)                                      */
/* ------------------------------------------------------------------ */
.output-toggle {
  display: flex;
  gap: .375rem;
  margin-top: .75rem;
  margin-bottom: 1.25rem;
}
.output-toggle-btn {
  padding: .3rem .75rem;
  font-size: .8125rem;
  font-family: var(--sans);
  font-weight: 500;
  border: 1.5px solid var(--border);
  border-radius: 5px;
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: all .14s;
}
.output-toggle-btn.active {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}
.output-toggle-btn:hover:not(.active) { border-color: var(--green); color: var(--green); }
.output-toggle-btn:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }
.output-refresh-btn { margin-left: auto; }

.raw-output {
  background: #1a1a18;
  color: #d4d0c8;
  border-radius: var(--r);
  padding: 1.25rem 1.5rem;
  font-family: var(--mono);
  font-size: .8125rem;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
  border: 1px solid var(--border);
}
.raw-output .raw-comment { color: #6b6860; }
.raw-output .raw-type    { color: #95d5b2; }
.raw-output .raw-data    { color: #d8f3dc; }

/* ------------------------------------------------------------------ */
/* Responsive                                                           */
/* ------------------------------------------------------------------ */
@media (max-width: 620px) {
  .input-row    { flex-direction: column; }
  .selects      { flex-direction: column; }
  select, button[type="submit"] { width: 100%; }
  .hero h1      { font-size: 1.375rem; }
  .comparison-columns { grid-template-columns: 1fr; }
}