/* ============================================================
   EDGAR - Experimental Design Generator and Randomiser
   Stylesheet
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #2d6a4f;
  --color-primary-dark: #1b4332;
  --color-primary-light: #52b788;
  --color-accent: #40916c;
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #212529;
  --color-text-secondary: #495057;
  --color-text-muted: #6c757d;
  --color-border: #dee2e6;
  --color-border-light: #e9ecef;
  --color-warning-bg: #fff3cd;
  --color-warning-text: #856404;
  --color-warning-border: #ffc107;
  --color-error-bg: #f8d7da;
  --color-error-text: #721c24;
  --color-error-border: #dc3545;
  --color-success-bg: #d4edda;
  --color-success-text: #155724;
  --color-success-border: #28a745;
  --color-info-bg: #d1ecf1;
  --color-info-text: #0c5460;
  --color-info-border: #17a2b8;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --transition: 0.2s ease;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

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

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

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

img {
  max-width: 100%;
  height: auto;
}

/* --- Header --- */
.site-header {
  background: var(--color-primary-dark);
  color: #ffffff;
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.site-header h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0;
}

.site-header h1 a {
  color: #ffffff;
  text-decoration: none;
}

.site-header h1 a:hover {
  text-decoration: none;
  opacity: 0.9;
}

.header-subtitle {
  font-size: 0.8rem;
  opacity: 0.8;
  font-weight: 400;
}

/* --- Container --- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem;
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 1.5rem;
}

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

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

.breadcrumb .separator {
  color: var(--color-text-muted);
  user-select: none;
}

.breadcrumb .current {
  color: var(--color-text);
  font-weight: 500;
}

/* --- Card Grid --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.card:focus-within {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.card h2 a {
  color: inherit;
  text-decoration: none;
}

.card h2 a:hover {
  text-decoration: underline;
}

.card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  flex: 1;
}

.card-badges {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--color-border-light);
  color: var(--color-text-secondary);
}

.badge--layout {
  background: #e8f5e9;
  color: #2e7d32;
}

.badge--blocks {
  background: #e3f2fd;
  color: #1565c0;
}

/* --- Page Title --- */
.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.25rem;
}

.page-description {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

/* --- Form --- */
.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group--full {
  grid-column: 1 / -1;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.35rem;
}

.form-label .optional {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.form-hint {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 0.2rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.55rem 0.75rem;
  font-size: 0.9rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.15);
}

.form-input:invalid:not(:placeholder-shown),
.form-select:invalid:not(:placeholder-shown) {
  border-color: var(--color-error-border);
}

.form-input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.form-textarea {
  resize: vertical;
  min-height: 60px;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236c757d' d='M6 8.825L1.175 4h9.65L6 8.825z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition), opacity var(--transition);
  text-decoration: none;
  line-height: 1.4;
  white-space: nowrap;
}

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

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

.btn--primary {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.btn--primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--secondary:hover:not(:disabled) {
  background: var(--color-bg);
  border-color: var(--color-text-muted);
}

.btn--accent {
  background: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.btn--accent:hover:not(:disabled) {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--small {
  padding: 0.4rem 0.85rem;
  font-size: 0.82rem;
}

.btn-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* --- Loading Spinner --- */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner--dark {
  border-color: rgba(0, 0, 0, 0.1);
  border-top-color: var(--color-primary);
}

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

/* --- Alert / Messages --- */
.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: 1rem;
  border: 1px solid;
}

.alert--warning {
  background: var(--color-warning-bg);
  color: var(--color-warning-text);
  border-color: var(--color-warning-border);
}

.alert--error {
  background: var(--color-error-bg);
  color: var(--color-error-text);
  border-color: var(--color-error-border);
}

.alert--success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
  border-color: var(--color-success-border);
}

.alert--info {
  background: var(--color-info-bg);
  color: var(--color-info-text);
  border-color: var(--color-info-border);
}

.alert ul {
  margin: 0.3rem 0 0 1.2rem;
  padding: 0;
}

.validation-errors {
  margin-top: 0.5rem;
}

/* --- Results Section --- */
.results-section {
  margin-top: 2rem;
}

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.results-header h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.results-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  flex-wrap: wrap;
}

.results-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 1rem;
}

.tab-btn {
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font-sans);
  color: var(--color-text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.tab-btn:hover {
  color: var(--color-text);
}

.tab-btn--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 600;
}

.tab-panel {
  display: none;
}

.tab-panel--active {
  display: block;
}

/* --- Tables --- */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
}

.table-wrapper table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.table-wrapper th,
.table-wrapper td {
  padding: 0.55rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
  white-space: nowrap;
}

.table-wrapper th {
  background: var(--color-bg);
  font-weight: 600;
  color: var(--color-text);
  position: sticky;
  top: 0;
  z-index: 1;
}

.table-wrapper tbody tr:hover {
  background: rgba(45, 106, 79, 0.04);
}

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

/* --- Layout View --- */
.layout-section {
  margin-bottom: 1.5rem;
}

.layout-section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--color-border-light);
}

.layout-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
}

.layout-table-wrapper table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.layout-table-wrapper th,
.layout-table-wrapper td {
  padding: 0.45rem 0.75rem;
  text-align: center;
  border: 1px solid var(--color-border-light);
}

.layout-table-wrapper th {
  background: var(--color-primary-dark);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.8rem;
}

.layout-table-wrapper td {
  background: var(--color-surface);
}

.layout-table-wrapper tbody tr:nth-child(even) td {
  background: #f8fdf9;
}

/* --- Download Section --- */
.download-section {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.download-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

/* --- Footer --- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.75);
  text-align: center;
  padding: 1rem 1.5rem;
  font-size: 0.82rem;
  margin-top: auto;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.9);
}

/* --- Empty / Placeholder States --- */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--color-text-muted);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 1rem;
  opacity: 0.4;
}

.empty-state p {
  font-size: 0.95rem;
}

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

[hidden] {
  display: none !important;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .container,
  .container-narrow {
    padding: 1rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

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

  .site-header h1 {
    font-size: 1.15rem;
  }

  .page-title {
    font-size: 1.25rem;
  }

  .results-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn-group {
    width: 100%;
  }

  .btn-group .btn {
    flex: 1;
    min-width: 0;
  }

  .tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .tab-btn {
    padding: 0.5rem 0.85rem;
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    flex-direction: column;
    text-align: center;
  }

  .card {
    padding: 1.15rem;
  }

  .form-card {
    padding: 1.15rem;
  }
}

/* --- Design Reference / Documentation Panel --- */
.doc-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.doc-panel__toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  cursor: pointer;
  user-select: none;
  list-style: none;
}

.doc-panel__toggle::-webkit-details-marker {
  display: none;
}

.doc-panel__toggle::before {
  content: "▶";
  font-size: 0.7rem;
  color: var(--color-primary);
  transition: transform var(--transition);
  display: inline-block;
  width: 1em;
}

.doc-panel[open] > .doc-panel__toggle::before {
  transform: rotate(90deg);
}

.doc-panel__toggle:hover {
  background: rgba(45, 106, 79, 0.04);
}

.doc-panel__icon {
  font-size: 1rem;
}

.doc-panel__hint {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.doc-panel__body {
  padding: 1.25rem 1.5rem 1.5rem;
  border-top: 1px solid var(--color-border-light);
  color: var(--color-text);
  line-height: 1.7;
}

.doc-panel__loading,
.doc-panel__error {
  color: var(--color-text-muted);
  font-style: italic;
  font-size: 0.9rem;
}

/* Rendered markdown typography inside the panel */
.doc-panel__body h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--color-border);
}

.doc-panel__body h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.doc-panel__body h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
  margin-top: 1.1rem;
  margin-bottom: 0.4rem;
}

.doc-panel__body p {
  margin-bottom: 0.75rem;
}

.doc-panel__body ul,
.doc-panel__body ol {
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.doc-panel__body li {
  margin-bottom: 0.25rem;
}

.doc-panel__body code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 0.1em 0.35em;
  color: var(--color-primary-dark);
}

.doc-panel__body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  overflow-x: auto;
  display: block;
}

.doc-panel__body th {
  background: var(--color-primary-dark);
  color: #ffffff;
  font-weight: 600;
  padding: 0.5rem 0.85rem;
  text-align: left;
  white-space: nowrap;
}

.doc-panel__body td {
  padding: 0.45rem 0.85rem;
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: top;
}

.doc-panel__body tbody tr:nth-child(even) td {
  background: var(--color-bg);
}

.doc-panel__body hr {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin: 1.25rem 0;
}

.doc-panel__body strong {
  font-weight: 600;
  color: var(--color-text);
}

/* --- Print --- */
@media print {
  .site-header,
  .site-footer,
  .btn,
  .tabs,
  .download-section {
    display: none !important;
  }

  body {
    background: #ffffff;
    color: #000000;
  }

  .table-wrapper {
    border: 1px solid #000;
  }

  .table-wrapper th {
    background: #eee;
  }
}