/* -- Color tokens --------------------------------------------- */
:root {
  --bg: #ffffff;
  --fg: #222222;
  --fg-muted: #888888;
  --heading: #333333;
  --link: #007BFF;
  --border: #dddddd;
  --th-bg: #f2f2f2;
  --th-hover: #e6e6e6;
  --row-even: #f9f9f9;
  --row-hover: #e0e0e0;
  --sort-arrow: #999999;
  --sort-arrow-active: #333333;
  --error-fg: #d32f2f;
  --error-bg: #ffebee;
  --error-border: #d32f2f;
  --code-bg: #f5f5f5;
  --toggle-bg: #cccccc;
  --toggle-knob: #ffffff;
}

[data-theme="dark"] {
  --bg: #202020;
  --fg: #e0e0e0;
  --fg-muted: #999999;
  --heading: #e8e8e8;
  --link: #64b5f6;
  --border: #2d2d2d;
  --th-bg: #1f1f1f;
  --th-hover: #2d2d2d;
  --row-even: #1a1a1a;
  --row-hover: #262626;
  --sort-arrow: #777777;
  --sort-arrow-active: #e0e0e0;
  --error-fg: #ef9a9a;
  --error-bg: #3e1c1c;
  --error-border: #ef5350;
  --code-bg: #1f1f1f;
  --toggle-bg: #64b5f6;
  --toggle-knob: #202020;
}

/* -- Base ----------------------------------------------------- */
body {
  font-family: sans-serif;
  margin: 20px;
  line-height: 1.6;
  background-color: var(--bg);
  color: var(--fg);
  transition: background-color 0.3s, color 0.3s;
}

form {
  line-height: 2.2;
}

h1,
h2,
h3 {
  color: var(--heading);
  margin-bottom: 10px;
}

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

a:hover {
  text-decoration: underline;
}

code {
  background-color: var(--code-bg);
  padding: 1px 4px;
  border-radius: 3px;
}

/* -- Table ---------------------------------------------------- */
table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: 20px;
  line-height: 1.3;
}

th {
  border: 1px solid var(--border);
  padding: 4px 8px;
  padding-right: 20px;
  text-align: left;
  background-color: var(--th-bg);
  cursor: pointer;
  user-select: none;
  position: relative;
  white-space: normal;
  color: var(--fg);
}

td {
  border: 1px solid var(--border);
  padding: 4px 8px;
  text-align: left;
  white-space: nowrap;
}

th:hover {
  background-color: var(--th-hover);
}

th::after {
  content: '';
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.7em;
  color: var(--sort-arrow);
}

th.sort-asc::after {
  content: '\25B2';
  color: var(--sort-arrow-active);
}

th.sort-desc::after {
  content: '\25BC';
  color: var(--sort-arrow-active);
}

tr:nth-child(even) {
  background-color: var(--row-even);
}

tr:hover {
  background-color: var(--row-hover);
}

.table-container {
  overflow-x: auto;
  margin-bottom: 15px;
}

/* -- Error block ---------------------------------------------- */
.error {
  color: var(--error-fg);
  font-weight: bold;
  white-space: pre-wrap;
  font-family: 'Courier New', Courier, monospace;
  background-color: var(--error-bg);
  padding: 15px;
  border-left: 5px solid var(--error-border);
  border-radius: 4px;
  margin: 15px 0;
}

/* -- Dark-mode toggle ---------------------------------------- */
.theme-toggle {
  position: fixed;
  top: 14px;
  right: 20px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--fg-muted);
  cursor: pointer;
  user-select: none;
}

.theme-toggle__track {
  width: 40px;
  height: 22px;
  border-radius: 11px;
  background: var(--toggle-bg);
  position: relative;
  transition: background 0.3s;
}

.theme-toggle__knob {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--toggle-knob);
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform 0.3s;
}

[data-theme="dark"] .theme-toggle__knob {
  transform: translateX(18px);
}

.theme-toggle__icon {
  font-size: 1rem;
  line-height: 1;
}

/* -- Utility classes ----------------------------------------- */
.page-footer {
  margin-top: 40px;
  margin-bottom: 20px;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

.warning-text {
  color: #d32f2f;
}

[data-theme="dark"] .warning-text {
  color: #ef9a9a;
}

input,
select {
  color: var(--fg);
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
}

button {
  color: var(--fg);
  background-color: var(--th-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  cursor: pointer;
}

button:hover {
  background-color: var(--th-hover);
}

/* -- Loading Spinner ----------------------------------------- */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-radius: 50%;
  border-top-color: var(--link);
  animation: spin 0.8s linear infinite;
  vertical-align: middle;
  margin-right: 8px;
}

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

/* -- Consolidated Site Header ------------------------------- */
.site-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 14px;
  margin-bottom: 22px;
}

.header-branding {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.header-branding h1 {
  margin: 0;
  font-size: 1.85rem;
  letter-spacing: -0.02em;
}

.header-branding h1 a {
  color: var(--heading);
  text-decoration: none;
}

.header-branding h1 a:hover {
  text-decoration: underline;
}

.header-tagline {
  font-size: 1.05rem;
  color: var(--fg-muted);
}

.header-nav-links {
  margin-top: 8px;
  font-size: 0.95rem;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.header-version-bar {
  margin-top: 8px;
  font-size: 0.88rem;
  color: var(--fg-muted);
}

.header-version-bar code {
  font-size: 0.85rem;
  color: var(--fg);
}

/* -- Two-Column Form Grid ------------------------------------ */
.opt1-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  column-gap: 20px;
  row-gap: 16px;
  align-items: start;
  max-width: 1000px;
  margin-top: 8px;
}

.opt1-grid label {
  font-weight: 500;
  text-align: right;
  padding-top: 4px;
  color: var(--fg);
}

.opt1-valign-center {
  align-self: center;
}

label.opt1-valign-center {
  align-self: center;
  padding-top: 0;
}

.opt1-field-content {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.opt1-gff-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.opt1-actions {
  grid-column: 2 / -1;
  margin-top: 8px;
  display: flex;
  gap: 10px;
  align-items: center;
}

.field-helper {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.4;
}

/* -- Metadata Summary Box & Actions ------------------------- */
.meta-summary-box {
  background-color: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 18px;
  margin-bottom: 22px;
  font-size: 0.92rem;
  line-height: 1.6;
}

.meta-summary-row {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
}

.meta-summary-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.results-actions-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.action-btn-primary {
  background-color: var(--link);
  color: #ffffff;
  border-color: var(--link);
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 4px;
  cursor: pointer;
}

.action-btn-primary:hover {
  opacity: 0.9;
}

.page-disclaimer {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  max-width: 1000px;
  font-size: 0.88rem;
  color: var(--fg-muted);
  line-height: 1.5;
}