/* Header & navigation */
header.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.88);
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  backdrop-filter: saturate(180%) blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 15px;
  color: var(--fg);
  flex-shrink: 0;
  transition: opacity var(--transition);
}

.logo:hover { opacity: 0.85; }

.logo img {
  height: 36px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo span {
  display: none;
}

@media (min-width: 640px) {
  .logo span { display: inline; }
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  cursor: pointer;
  color: var(--fg);
  transition: background var(--transition), border-color var(--transition);
}

.nav-toggle:hover { background: var(--gray-bg); }

.nav-toggle:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

.nav-toggle svg { display: block; }

@media (min-width: 900px) {
  .nav-toggle { display: none; }
}

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  flex-direction: column;
  gap: 4px;
  padding: 12px 16px 16px;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

.site-nav.is-open { display: flex; }

@media (min-width: 900px) {
  .site-nav {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 4px;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
  }
}

.site-nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.site-nav a:hover {
  color: var(--fg);
  background: var(--gray-bg);
}

.site-nav a.active,
.site-nav a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-muted);
}

/* Tools dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  font-family: inherit;
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}

.nav-dropdown-toggle:hover {
  color: var(--fg);
  background: var(--gray-bg);
}

.nav-dropdown-toggle:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

.nav-dropdown.active .nav-dropdown-toggle {
  color: var(--accent);
  background: var(--accent-muted);
}

.nav-dropdown-toggle svg {
  transition: transform var(--transition);
}

.nav-dropdown.is-open .nav-dropdown-toggle svg {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  display: none;
  flex-direction: column;
  gap: 2px;
  padding: 4px 0 0 12px;
}

.nav-dropdown.is-open .nav-dropdown-menu {
  display: flex;
}

.nav-dropdown-menu a {
  display: block;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}

.nav-dropdown-menu a:hover {
  color: var(--fg);
  background: var(--gray-bg);
}

.nav-dropdown-menu a.active,
.nav-dropdown-menu a[aria-current="page"] {
  color: var(--accent);
  background: var(--accent-muted);
}

@media (min-width: 900px) {
  .nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    min-width: 220px;
    padding: 6px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
  }

  .nav-dropdown.is-open .nav-dropdown-menu {
    display: flex;
  }
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-left: 4px;
  flex-shrink: 0;
}

.lang-switch a {
  padding: 6px 11px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  transition: background var(--transition), color var(--transition);
}

.lang-switch a:hover { color: var(--fg); }

.lang-switch a.active {
  background: var(--primary);
  color: #fff;
}

header.site-header .header-inner {
  position: relative;
}

/* Breadcrumb */
.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--muted);
  transition: color var(--transition);
}

.breadcrumb a:hover { color: var(--fg); }

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}

/* Forms */
label.field-label,
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
}

input[type="text"],
input[type="number"],
input[type="email"],
select,
textarea {
  width: 100%;
  font: inherit;
  font-size: 14px;
  line-height: 1.5;
  padding: 10px 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  color: var(--fg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--ring);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 600px) {
  .form-grid { grid-template-columns: 1fr; }
}

/* Buttons */
button.primary,
.btn-primary {
  appearance: none;
  cursor: pointer;
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  border-radius: var(--radius-md);
  transition: background var(--transition), transform 0.1s ease, box-shadow var(--transition);
}

button.primary:hover,
.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: var(--shadow-sm);
}

button.primary:active,
.btn-primary:active {
  transform: translateY(1px);
}

button.primary:disabled,
.btn-primary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

button.primary:focus-visible,
.btn-primary:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

button.secondary,
.btn-secondary {
  appearance: none;
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border-strong);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  border-radius: var(--radius-md);
  margin-right: 8px;
  margin-top: 8px;
  transition: background var(--transition), border-color var(--transition);
}

button.secondary:hover,
.btn-secondary:hover {
  background: var(--gray-bg);
  border-color: var(--border);
}

.actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 16px;
  flex-wrap: wrap;
}

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

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 999px;
  border: 1px solid transparent;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.badge.valid     { color: var(--green-fg);  background: var(--green-bg);  border-color: var(--green-border); }
.badge.expiring  { color: var(--yellow-fg); background: var(--yellow-bg); border-color: var(--yellow-border); }
.badge.critical  { color: var(--orange-fg); background: var(--orange-bg); border-color: var(--orange-border); }
.badge.expired   { color: var(--red-fg);    background: var(--red-bg);    border-color: var(--red-border); }
.badge.unreachable { color: var(--gray-fg); background: var(--gray-bg); border-color: var(--gray-border); }
.badge.loading   { color: var(--muted); background: #f8fafc; border-color: var(--border); }

/* Meta grid */
.meta {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 16px;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.meta .k { color: var(--muted); margin-right: 6px; }
.meta .v { color: var(--fg); word-break: break-all; }
.meta .full { grid-column: 1 / -1; }

/* Data tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.data-table th,
.data-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.data-table th {
  color: var(--muted);
  font-weight: 500;
  font-size: 13px;
}

.data-table tr:hover td { background: rgba(247, 249, 251, 0.8); }

.data-table a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-color: var(--border);
  transition: text-decoration-color var(--transition);
}

.data-table a:hover { text-decoration-color: var(--primary); }

.source-tag {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-left: 8px;
}

/* Content pages */
.prose a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-color: var(--border);
  transition: color var(--transition), text-decoration-color var(--transition);
}

.prose a:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

.prose p { margin: 0 0 14px; }

.prose ul, .prose ol {
  margin: 0 0 14px;
  padding-left: 20px;
}

.prose li { margin-bottom: 8px; }

.prose .updated {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 28px;
}

.prose dl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px 0;
}

.prose dt {
  font-weight: 600;
  margin-top: 20px;
  color: var(--fg);
}

.prose dd {
  margin: 4px 0 0;
  color: var(--muted);
}

.prose pre {
  background: var(--gray-bg);
  padding: 14px;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 13px;
  overflow: auto;
  border: 1px solid var(--border);
}

.prose .faq-item {
  border-bottom: 1px solid var(--border);
  padding-bottom: 20px;
  margin-bottom: 20px;
}

.prose .faq-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 28px;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  transition: color var(--transition);
}

.back-link:hover { color: var(--accent); }

/* Tools */
.tool-output {
  font-family: var(--font-mono);
  font-size: 12px;
  min-height: 120px;
  margin-top: 12px;
}

.tool-decode-dl {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 8px 16px;
  font-size: 14px;
  margin-top: 20px;
  font-variant-numeric: tabular-nums;
}

.tool-decode-dl dt { color: var(--muted); }
.tool-decode-dl dd { margin: 0; word-break: break-all; }

@media (max-width: 600px) {
  .tool-decode-dl { grid-template-columns: 1fr; }
  .meta { grid-template-columns: 1fr; }
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  margin-top: 48px;
  color: var(--muted);
  font-size: 13px;
  background: var(--bg-elevated);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.footer-inner a {
  color: var(--muted);
  transition: color var(--transition);
}

.footer-inner a:hover { color: var(--fg); }

.footer-sep { color: var(--border-strong); }

/* Cookie banner */
.cookie-banner {
  position: fixed;
  left: 16px;
  right: 16px;
  bottom: 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 16px 20px;
  display: none;
  z-index: var(--z-banner);
  max-width: 640px;
  margin: 0 auto;
}

.cookie-banner.show {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.cookie-banner p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  flex: 1;
  min-width: 200px;
}

.cookie-banner button { white-space: nowrap; }

/* Spinner */
.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--muted);
  border-radius: 50%;
  display: inline-block;
  animation: spin 0.8s linear infinite;
}

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