:root {
  color-scheme: light dark;
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-surface-alt: #101828;
  --color-text: #0f172a;
  --color-text-muted: #475467;
  --color-accent: #2563eb;
  --color-accent-muted: rgba(37, 99, 235, 0.1);
  --color-border: #d0d5dd;
  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

img {
  max-width: 100%;
}

.container {
  width: min(1200px, 90vw);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: #fff;
  z-index: 10;
}

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 5;
}

.header-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-mark {
  font-size: 1.8rem;
}

.brand-label {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.brand-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.site-menu {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

.site-menu a {
  font-weight: 500;
}

.site-menu a.active {
  color: var(--color-accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle-bar {
  width: 1.5rem;
  height: 0.2rem;
  background: var(--color-text);
  display: block;
  position: relative;
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 100%;
  background: inherit;
}

.nav-toggle-bar::before {
  top: -0.4rem;
}

.nav-toggle-bar::after {
  top: 0.4rem;
}

.hero {
  padding: 4rem 0 3rem;
}

.hero-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: stretch;
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin: 0.5rem 0 1rem;
}

.lead {
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  border: 2px solid transparent;
  transition: transform 0.2s ease;
}

.btn.primary {
  background: var(--color-accent);
  color: #fff;
}

.btn.ghost {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn:hover,
.btn:focus {
  transform: translateY(-2px);
  text-decoration: none;
}

.hero-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
}

.hero-panel ul {
  padding-left: 1.25rem;
  margin: 0;
}

.panel-label {
  margin-top: 0;
  font-weight: 600;
  color: var(--color-text-muted);
}

.section {
  padding: 3rem 0;
}

.section-alt {
  background: var(--color-surface);
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.cards-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.05);
}

.card-link {
  font-weight: 600;
}

.split {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: start;
}

.checklist {
  list-style: none;
  padding-left: 0;
}

.checklist li::before {
  content: "✓";
  color: var(--color-accent);
  margin-right: 0.5rem;
}

.doc-links {
  display: grid;
  gap: 0.5rem;
  background: var(--color-accent-muted);
  padding: 1.5rem;
  border-radius: 1rem;
}

.doc-links a {
  background: #fff;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border);
  font-weight: 500;
}

.deploy-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  padding: 1.5rem;
}

pre {
  background: #0f172a;
  color: #f8fafc;
  padding: 1rem;
  border-radius: 0.75rem;
  overflow-x: auto;
}

.hint {
  color: var(--color-text-muted);
}

.cta {
  text-align: center;
  background: var(--color-surface-alt);
  color: #fff;
}

.cta p {
  color: rgba(255, 255, 255, 0.8);
}

.site-footer {
  background: #0b1120;
  color: rgba(255, 255, 255, 0.8);
  padding: 2rem 0;
}

.site-footer a {
  color: #93c5fd;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 720px) {
  .site-menu {
    flex-direction: column;
    background: var(--color-surface);
    position: absolute;
    right: 1rem;
    top: 4.5rem;
    padding: 1rem 1.5rem;
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    display: none;
  }

  .site-menu.open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }
}

/* DNS Monitor Specific Styles */

.hero-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 2rem;
}

.controls-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  padding: 1.5rem;
  background: var(--color-surface);
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.btn-icon {
  display: inline-block;
  margin-right: 0.5rem;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-border);
  animation: pulse 2s ease-in-out infinite;
}

.status-dot.loading {
  background: #f59e0b;
}

.status-dot.success {
  background: #10b981;
}

.status-dot.error {
  background: #ef4444;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.last-update {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 3rem;
  color: var(--color-text-muted);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--color-accent-muted);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.error-state {
  padding: 1.5rem;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 0.75rem;
  color: #991b1b;
  margin: 1rem 0;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.dns-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.dns-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.dns-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.dns-card-header.error {
  background: #fef2f2;
  border-bottom-color: #fecaca;
}

.dns-card-header h3 {
  margin: 0;
  font-size: 1.2rem;
  word-break: break-all;
}

.status-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-badge.success {
  background: #d1fae5;
  color: #065f46;
}

.status-badge.error {
  background: #fee2e2;
  color: #991b1b;
}

.dns-card-body {
  padding: 1.25rem;
}

.records-section {
  margin-bottom: 1.5rem;
}

.records-section h4 {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--color-text-muted);
}

.record-type {
  margin-bottom: 1.5rem;
}

.record-type h5 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
}

.record-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.record-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-bg);
  gap: 1rem;
}

.record-list li:last-child {
  border-bottom: none;
}

.record-list code {
  background: var(--color-bg);
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-size: 0.85rem;
  font-family: "Courier New", monospace;
  word-break: break-all;
  flex: 1;
}

.record-list small {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.subdomains-section {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.subdomains-section h4 {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--color-text-muted);
}

.subdomain-item {
  margin-bottom: 1rem;
}

.subdomain-item h5 {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
}

.no-records {
  color: var(--color-text-muted);
  font-style: italic;
}

.error-message {
  color: #991b1b;
  margin: 0;
}

.dns-card-footer {
  padding: 0.75rem 1.25rem;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.domain-form-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
}

.domain-form {
  background: var(--color-surface);
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-group input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  font-size: 1rem;
  font-family: inherit;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-group small {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.current-domains {
  background: var(--color-surface);
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
}

.current-domains h3 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.domains-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.domains-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem;
  border-bottom: 1px solid var(--color-bg);
}

.domains-list li:last-child {
  border-bottom: none;
}

.domains-list li.empty {
  color: var(--color-text-muted);
  font-style: italic;
  justify-content: center;
}

.domain-name {
  font-family: "Courier New", monospace;
  font-size: 0.9rem;
}

.btn-remove {
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 0.25rem;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 1rem;
  transition: all 0.2s;
}

.btn-remove:hover {
  background: #fef2f2;
  border-color: #fecaca;
  color: #991b1b;
}

.tech-panel {
  background: var(--color-surface);
  padding: 1.5rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border);
  margin-top: 1rem;
}

.tech-panel h3 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.tech-panel p {
  margin: 0.5rem 0;
}

@media (max-width: 900px) {
  .results-grid {
    grid-template-columns: 1fr;
  }

  .domain-form-wrapper {
    grid-template-columns: 1fr;
  }

  .controls-bar {
    flex-direction: column;
    gap: 1rem;
  }
}