/* ==========================================================================
   FDSN Service Check - Modern CSS
   ========================================================================== */

/* ==========================================================================
   1. CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
  /* Colors - Light Mode */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-success: #16a34a;
  --color-success-bg: #dcfce7;
  --color-fail: #dc2626;
  --color-fail-bg: #fee2e2;
  --color-warning: #ca8a04;
  --color-warning-bg: #fef9c3;
  --color-text: #1f2937;
  --color-text-secondary: #4b5563;
  --color-text-muted: #9ca3af;
  --color-bg: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-bg-tertiary: #f3f4f6;
  --color-border: #e5e7eb;
  --color-border-dark: #d1d5db;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Monaco, Consolas, monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  /* Layout */
  --max-width: 1200px;
  --border-radius-sm: 0.25rem;
  --border-radius: 0.375rem;
  --border-radius-lg: 0.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #60a5fa;
    --color-primary-hover: #93c5fd;
    --color-success: #4ade80;
    --color-success-bg: #14532d;
    --color-fail: #f87171;
    --color-fail-bg: #7f1d1d;
    --color-warning: #facc15;
    --color-warning-bg: #713f12;
    --color-text: #f9fafb;
    --color-text-secondary: #d1d5db;
    --color-text-muted: #9ca3af;
    --color-bg: #111827;
    --color-bg-secondary: #1f2937;
    --color-bg-tertiary: #374151;
    --color-border: #374151;
    --color-border-dark: #4b5563;
  }
}

/* ==========================================================================
   2. Reset & Base Styles
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: var(--space-4);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* ==========================================================================
   3. Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  margin-bottom: var(--space-4);
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-text);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); margin-bottom: var(--space-3); }

p {
  margin-top: 0;
  margin-bottom: var(--space-4);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--border-radius-sm);
}

strong, b {
  font-weight: 600;
}

/* ==========================================================================
   4. Page Layout
   ========================================================================== */

/* Page Header */
.page-header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.page-header h1 {
  margin-bottom: var(--space-2);
}

.page-header .subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* Section Layout */
.section {
  margin-bottom: var(--space-8);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.section-header h2 {
  margin-bottom: 0;
}

/* ==========================================================================
   5. Collapsible Info Section
   ========================================================================== */

.info-section {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--space-6);
  overflow: hidden;
}

.info-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  cursor: pointer;
  user-select: none;
  transition: background-color var(--transition-fast);
}

.info-header:hover {
  background-color: var(--color-bg-tertiary);
}

.info-header:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

.info-header h3 {
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.info-toggle-icon {
  transition: transform var(--transition-base);
  font-size: var(--font-size-sm);
}

.info-section.collapsed .info-toggle-icon {
  transform: rotate(-90deg);
}

.info-content {
  padding: 0 var(--space-4) var(--space-4);
  max-height: 1000px;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.info-section.collapsed .info-content {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
}

.info-content p {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-3);
}

.info-content p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   6. Status Classes (Test Results)
   ========================================================================== */

.fail {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-fail-bg);
  color: var(--color-fail);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius);
  text-decoration: none;
}

.fail:hover {
  text-decoration: none;
  filter: brightness(0.95);
}

.failOpinion {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius);
}

.success {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-success-bg);
  color: var(--color-success);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius);
  text-decoration: none;
}

.success:hover {
  text-decoration: none;
  filter: brightness(0.95);
}

.supported {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  border-radius: var(--border-radius);
  text-decoration: none;
}

.supported:hover {
  text-decoration: none;
  background-color: var(--color-border);
}

.unsupported {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  background-color: transparent;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-style: italic;
  border-radius: var(--border-radius);
}

/* ==========================================================================
   7. Buttons
   ========================================================================== */

button, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: inherit;
  font-size: var(--font-size-sm);
  font-weight: 500;
  line-height: 1;
  color: white;
  background-color: var(--color-primary);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
  min-width: 70px;
}

button:hover, .btn:hover {
  background-color: var(--color-primary-hover);
}

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

button:active, .btn:active {
  transform: scale(0.98);
}

button:disabled, .btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Button with loading state */
button.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

button.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ==========================================================================
   8. Tables
   ========================================================================== */

.table-container {
  overflow-x: auto;
  margin-bottom: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  background-color: var(--color-bg);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

thead {
  background-color: var(--color-bg-secondary);
  position: sticky;
  top: 0;
}

th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

tbody tr {
  transition: background-color var(--transition-fast);
}

tbody tr:hover {
  background-color: var(--color-bg-secondary);
}

tbody tr:nth-child(even) {
  background-color: var(--color-bg-secondary);
}

tbody tr:nth-child(even):hover {
  background-color: var(--color-bg-tertiary);
}

tbody tr:last-child td {
  border-bottom: none;
}

td span {
  min-width: 80px;
  display: inline-block;
}

/* Cell types */
td.testresult {
  min-width: 80px;
  text-align: center;
}

td.runtime {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-align: right;
}

td.testmessage {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ==========================================================================
   9. Loading & Spinner
   ========================================================================== */

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

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 12px;
  height: 12px;
  border-width: 1.5px;
}

.spinner-lg {
  width: 24px;
  height: 24px;
  border-width: 3px;
}

/* Running state for table cells */
.running {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
}

/* Pulse animation for pending items */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.pending {
  animation: pulse 1.5s ease-in-out infinite;
  color: var(--color-text-muted);
}

/* Loading placeholder for initial load */
.loading-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  color: var(--color-text-muted);
  gap: var(--space-4);
}

.loading-placeholder .spinner {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

/* ==========================================================================
   10. Legend
   ========================================================================== */

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: var(--space-4);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-sm);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.legend-label {
  color: var(--color-text-secondary);
}

/* ==========================================================================
   11. Summary Stats
   ========================================================================== */

.summary-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding: var(--space-4);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-4);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  line-height: 1;
}

.stat-value.passed {
  color: var(--color-success);
}

.stat-value.failed {
  color: var(--color-fail);
}

.stat-value.opinion {
  color: var(--color-warning);
}

.stat-value.running {
  color: var(--color-primary);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* Progress bar for running tests */
.progress-container {
  flex: 1;
  min-width: 200px;
}

.progress-bar {
  height: 8px;
  background-color: var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: var(--border-radius);
  transition: width var(--transition-base);
}

.progress-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* ==========================================================================
   12. Footer
   ========================================================================== */

footer {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}

footer p {
  margin-bottom: var(--space-2);
}

footer p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   13. Error Message Tooltips
   ========================================================================== */

.error-hint {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: var(--space-1);
}

.error-hint.cors {
  color: var(--color-warning);
}

/* ==========================================================================
   14. Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
  body {
    padding: var(--space-3);
  }

  .container {
    padding: 0 var(--space-2);
  }

  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }
  h3 { font-size: var(--font-size-lg); }

  .page-header {
    margin-bottom: var(--space-6);
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  /* Table adjustments */
  .table-container {
    border-radius: var(--border-radius);
  }

  table {
    font-size: var(--font-size-xs);
  }

  th, td {
    padding: var(--space-2) var(--space-3);
  }

  /* Hide less important columns on mobile */
  th.hide-mobile, td.hide-mobile {
    display: none;
  }

  button {
    min-width: 60px;
    padding: var(--space-2) var(--space-3);
  }

  .legend {
    gap: var(--space-3);
    padding: var(--space-3);
  }

  .info-content p {
    font-size: var(--font-size-xs);
  }
}

@media (max-width: 480px) {
  .legend {
    flex-direction: column;
    gap: var(--space-2);
  }

  td.testmessage {
    max-width: 150px;
  }
}

/* ==========================================================================
   13. Utility Classes
   ========================================================================== */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: var(--font-size-sm); }
.text-xs { font-size: var(--font-size-xs); }

.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }