/* ─── Custom properties ─────────────────────────────────────────── */
:root {
  --color-primary:      #6d28d9;  /* indigo-700  */
  --color-primary-dark: #4c1d95;  /* indigo-900  */
  --color-primary-light:#ede9fe;  /* violet-100  */
  --color-surface:      #ffffff;
  --color-bg:           #f5f3ff;  /* violet-50   */
  --color-text:         #1e1b4b;  /* indigo-950  */
  --color-muted:        #6b7280;
  --color-border:       #ddd6fe;  /* violet-200  */
  --color-danger:       #dc2626;
  --color-danger-light: #fee2e2;
  --color-success:      #059669;
  --color-success-light:#d1fae5;
  --color-warning:      #d97706;
  --color-warning-light:#fef3c7;
  --radius-card:        1rem;
  --shadow-card:        0 20px 60px -10px rgba(109,40,217,0.18), 0 4px 16px -4px rgba(109,40,217,0.10);
}

/* ─── Base ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Lato', 'Segoe UI', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background: linear-gradient(135deg, #4c1d95 0%, #6d28d9 40%, #7c3aed 70%, #5b21b6 100%);
  min-height: 100vh;
}

/* ─── Header ────────────────────────────────────────────────────── */
.site-header a {
  text-decoration: none;
}

.site-header {
  text-align: center;
  padding: 3rem 1rem 0;
}

.site-title {
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.02em;
  margin: 0 0 0.25rem;
}

.site-tagline {
  color: rgba(255,255,255,0.72);
  font-size: 1rem;
  margin: 0 0 2rem;
}

/* ─── Main card ─────────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 2rem;
  max-width: 640px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .card { padding: 2.5rem 3rem; }
}

/* ─── Form ──────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 120px;
  gap: 0.75rem;
  align-items: start;
}

.input {
  width: 100%;
  padding: 0.65rem 0.9rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
  background: #fff;
  border: 2px solid var(--color-border);
  border-radius: 0.5rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(109,40,217,0.15);
}

.input--error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.12);
}

.input-error-msg {
  font-size: 0.78rem;
  color: var(--color-danger);
  margin-top: 0.3rem;
}

/* ─── Button ────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 2rem;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background 0.18s, transform 0.1s, box-shadow 0.18s;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid rgba(109,40,217,0.4);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(109,40,217,0.35);
  width: 100%;
  margin-top: 0.5rem;
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 6px 20px rgba(109,40,217,0.45);
  transform: translateY(-1px);
}

.btn--primary:active { transform: translateY(0); }
.btn--primary:disabled { opacity: 0.65; cursor: not-allowed; transform: none; }

/* ─── Spinner ───────────────────────────────────────────────────── */
.spinner {
  width: 1.15em;
  height: 1.15em;
  border: 2.5px solid rgba(255,255,255,0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Result card ───────────────────────────────────────────────── */
.result-card {
  margin-top: 2rem;
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 1.5rem;
  display: none;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.result-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-text);
  word-break: break-all;
  margin: 0;
}

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-muted);
  border-radius: 0.375rem;
  padding: 0.3rem;
  transition: color 0.18s, background 0.18s;
  line-height: 0;
}

.icon-btn:hover { color: var(--color-primary); background: var(--color-primary-light); }
.icon-btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* ─── Status badges row ─────────────────────────────────────────── */
.badges-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

/* ─── Badge ─────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border-radius: 9999px;
  padding: 0.2rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.badge--green   { background: var(--color-success-light); color: #065f46; }
.badge--amber   { background: var(--color-warning-light); color: #78350f; }
.badge--red     { background: var(--color-danger-light);  color: #991b1b; }
.badge--grey    { background: #f3f4f6; color: #4b5563; }
.badge--valid   { background: #dbeafe; color: #1e3a8a; }
.badge--invalid { background: var(--color-danger-light);  color: #991b1b; }
.badge--cached  { background: #f3f4f6; color: #4b5563; }
.badge--leaf    { background: var(--color-primary-light); color: var(--color-primary-dark); font-size: 0.7rem; padding: 0.1rem 0.55rem; }
.badge--tls     { background: #fef9c3; color: #713f12; }

/* ─── Field grid ────────────────────────────────────────────────── */
.fields-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 1.25rem;
}

@media (max-width: 420px) {
  .fields-grid { grid-template-columns: 1fr; }
}

.field {
  margin-bottom: 1.1rem;
}

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

.field__label {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-muted);
  margin-bottom: 0.2rem;
  position: relative;
}

/* Tooltip ─────────────────────────────────────────────────────── */
.tooltip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1em;
  height: 1em;
  border-radius: 50%;
  background: #e5e7eb;
  color: #6b7280;
  font-size: 0.65rem;
  font-weight: 700;
  cursor: default;
  position: relative;
}

.tooltip-icon[data-tip]:hover::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  background: #1e1b4b;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 400;
  white-space: nowrap;
  padding: 0.35rem 0.65rem;
  border-radius: 0.35rem;
  z-index: 10;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
}

.field__value {
  font-size: 0.92rem;
  color: var(--color-text);
  word-break: break-all;
}

.field__value--mono {
  font-family: 'Cascadia Code', 'Fira Code', 'Courier New', monospace;
  font-size: 0.78rem;
  color: #374151;
  word-break: break-all;
}

/* ─── SAN pills ─────────────────────────────────────────────────── */
.san-pill {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: 9999px;
  padding: 0.15rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 600;
  margin: 0.15rem 0.15rem 0.15rem 0;
  word-break: break-word;
}

/* ─── Chain (collapsible) ───────────────────────────────────────── */
.chain-details {
  border: 1.5px solid var(--color-border);
  border-radius: 0.5rem;
  overflow: hidden;
}

.chain-details summary {
  padding: 0.6rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  cursor: pointer;
  list-style: none;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}

.chain-details summary::-webkit-details-marker { display: none; }

.chain-details summary::after {
  content: '▸';
  font-size: 0.85em;
  transition: transform 0.2s;
}

.chain-details[open] summary::after { transform: rotate(90deg); }

.chain-body { padding: 0.5rem 0.75rem 0.75rem; }

.chain-entry {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 0.45rem;
  padding: 0.6rem 0.85rem;
  margin-bottom: 0.45rem;
  font-size: 0.83rem;
}

.chain-entry:last-child { margin-bottom: 0; }

.chain-entry strong { color: var(--color-text); }

.chain-entry .chain-meta {
  color: var(--color-muted);
  font-size: 0.76rem;
  margin-top: 0.25rem;
}

/* ─── Error card ────────────────────────────────────────────────── */
.error-card {
  margin-top: 2rem;
  background: var(--color-danger-light);
  border: 1.5px solid #fca5a5;
  border-radius: 0.75rem;
  padding: 1.25rem 1.5rem;
  display: none;
}

.error-card p {
  margin: 0;
  color: #991b1b;
  font-weight: 600;
  font-size: 0.95rem;
}

/* ─── Cache notice ──────────────────────────────────────────────── */
.cache-notice {
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--color-muted);
  text-align: right;
}

/* ─── Footer ────────────────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 2rem 1rem 3rem;
  color: rgba(255,255,255,0.65);
  font-size: 0.9rem;
}

.site-footer a {
  color: #c4b5fd;
  font-weight: 700;
  text-decoration: none;
}

.site-footer a:hover { text-decoration: underline; }

/* ─── Main layout wrapper ───────────────────────────────────────── */
.page-wrapper {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* ─── Divider ───────────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1.5px solid var(--color-border);
  margin: 1.25rem 0 1rem;
}

/* ─── Skip-to-content (a11y) ────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: #fff;
  color: var(--color-primary);
  font-weight: 700;
  padding: 0.5rem 1rem;
  border-radius: 0 0 0.5rem 0.5rem;
  transition: top 0.2s;
  z-index: 100;
}

.skip-link:focus { top: 0; }