:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --border: #e2e8f0;
  --border-focus: #3b82f6;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --header-color: #e11d48;
  --header-bg: #fff1f2;
  --header-border: #fecdd3;
  --payload-color: #7c3aed;
  --payload-bg: #f5f3ff;
  --payload-border: #ddd6fe;
  --signature-color: #059669;
  --signature-bg: #ecfdf5;
  --signature-border: #a7f3d0;
  --warning-color: #d97706;
  --warning-bg: #fffbebfb;
  --warning-border: #fde68a;
  --danger-color: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --success-color: #16a34a;
  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

html[data-theme="dark"],
html[data-site-theme="dark"] {
  --bg: #0c111b;
  --surface: #141c29;
  --surface-alt: #101722;
  --border: #263247;
  --border-focus: #60a5fa;
  --text-main: #e8edf6;
  --text-muted: #94a3b8;
  --header-color: #fb7185;
  --header-bg: #2c1219;
  --header-border: #4c1d24;
  --payload-color: #c084fc;
  --payload-bg: #221438;
  --payload-border: #3b1d66;
  --signature-color: #34d399;
  --signature-bg: #0d291e;
  --signature-border: #144a34;
  --warning-color: #fbbf24;
  --warning-bg: #2d2008;
  --warning-border: #4d360d;
  --danger-color: #f87171;
  --danger-bg: #321414;
  --danger-border: #522020;
  --success-color: #4ade80;
  --success-bg: #0f2d1a;
  --success-border: #1a4d2d;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
}

html[data-theme="dark"] body,
html[data-site-theme="dark"] body {
  background-color: #0c111b !important;
  color: #e8edf6 !important;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding: 1rem;
}

.jwt-app {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Header */
.tool-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.tool-heading h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);

}

.tool-heading p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.heading-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-button {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  min-height: 38px;
}

.theme-button:hover {
  border-color: var(--border-focus);
}

/* Panels */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.panel-heading h2 {
  font-size: 1.125rem;
  font-weight: 600;
}

.local-badge {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--surface-alt);
  color: var(--text-muted);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.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;
}

/* Input Area */
textarea {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
  color: var(--text-main);
  resize: vertical;
  word-break: break-all;
}

textarea:focus-visible,
textarea:focus {
  outline: none;
  border-color: var(--border-focus);
}

textarea:focus-visible,
button:focus-visible,
select:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

button:focus-visible,
select:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

.input-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.field-error {
  font-size: 0.875rem;
  color: var(--danger-color);
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.primary-button, .secondary-button {
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.primary-button {
  background: #2563eb;
  color: #ffffff;
}

.primary-button:hover {
  background: #1d4ed8;
}

.secondary-button {
  background: var(--surface-alt);
  border-color: var(--border);
  color: var(--text-main);
}

.secondary-button:hover {
  border-color: var(--border-focus);
}

.sample-control {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.sample-control select {
  font-size: 0.875rem;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--text-main);
  cursor: pointer;
}

/* Empty State */
.empty-state {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 2.5rem 1.5rem;
  background: var(--surface-alt);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
}

.empty-state span {
  font-size: 2.5rem;
  font-weight: 800;
  opacity: 0.4;
  color: var(--border-focus);
}

/* Overview Strip */
.overview-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
}

.overview-strip article {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.overview-strip span {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.overview-strip strong {
  font-size: 1rem;
  font-weight: 700;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.badge-active {
  background: var(--success-bg);
  color: var(--success-color);
  border-color: var(--success-border);
}

.badge-expired {
  background: var(--danger-bg);
  color: var(--danger-color);
  border-color: var(--danger-border);
}

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

.badge-info {
  background: var(--surface-alt);
  color: var(--text-muted);
  border-color: var(--border);
}

/* Workspace Grid */
.workspace-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.25rem;
}

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

.workspace-main {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.diagnostics-column {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Decoded Colored Segments Display */
.raw-segments {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 0.75rem;
  background: var(--surface-alt);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  word-break: break-all;
}

.segment-header {
  color: var(--header-color);
}

.segment-payload {
  color: var(--payload-color);
}

.segment-signature {
  color: var(--signature-color);
}

.segment-dot {
  color: var(--text-muted);
  font-weight: bold;
}

/* Pretty Code Box */
.code-box {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 320px;
}

.code-box.header-box {
  border-left: 4px solid var(--header-color);
}

.code-box.payload-box {
  border-left: 4px solid var(--payload-color);
}

/* Timestamps table */
.timestamps-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

.timestamps-table th,
.timestamps-table td {
  padding: 0.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.timestamps-table th {
  color: var(--text-muted);
  font-weight: 600;
}

.timestamps-table code {
  font-family: var(--font-mono);
}

/* Warnings list */
.warnings-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.warning-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.8125rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--warning-bg);
  color: var(--warning-color);
  border: 1px solid var(--warning-border);
}

.warning-item.danger {
  background: var(--danger-bg);
  color: var(--danger-color);
  border-color: var(--danger-border);
}

.warning-item.info {
  background: var(--surface-alt);
  color: var(--text-main);
  border-color: var(--border);
}

/* Signature status box */
.signature-box {
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  font-size: 0.8125rem;
}

.signature-box strong {
  display: block;
  margin-bottom: 0.25rem;
}

/* Export buttons */
.export-grid {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.export-grid button {
  font-size: 0.8125rem;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--text-main);
  cursor: pointer;
  text-align: left;
  transition: all 0.15s ease;
}

.export-grid button:hover {
  border-color: var(--border-focus);
}

.export-grid button.primary-button {
  background: #2563eb;
  color: #ffffff;
  border-color: transparent;
}

.export-grid button.primary-button:hover {
  background: #1d4ed8;
}

/* Privacy Strip */
.privacy-strip {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.privacy-strip strong {
  color: var(--text-main);

}

/* Dialog / Modal */
dialog {
  margin: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text-main);
  padding: 1.5rem;
  max-width: 600px;
  width: 90vw;
  box-shadow: var(--shadow);
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.5);
}

.context-modal {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.context-modal header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.context-modal footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: #1e293b;
  color: #f8fafc;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow);
  z-index: 9999;
}

html[data-theme="dark"] .toast,
html[data-site-theme="dark"] .toast {
  background: #e2e8f0;
  color: #0f172a;
}