/* Design tokens */
:root {
  color-scheme: light;
  --jwt-bg: #f3f6f9;
  --jwt-panel: #ffffff;
  --jwt-soft: #f6f8fb;
  --jwt-border: #cbd5e1;
  --jwt-text: #162033;
  --jwt-muted: #5b677a;
  --jwt-primary: #0969da;
  --jwt-primary-hover: #0757b8;
  --jwt-focus: #60a5fa;
  --jwt-info: #075985;
  --jwt-info-bg: #eaf7ff;
  --jwt-info-border: #a9ddf7;
  --jwt-success: #18794e;
  --jwt-success-bg: #ecfdf3;
  --jwt-success-border: #a7d7bd;
  --jwt-warning: #8a4b08;
  --jwt-warning-bg: #fff7df;
  --jwt-warning-border: #efd28e;
  --jwt-error: #b42318;
  --jwt-error-bg: #fff1f0;
  --jwt-error-border: #f0b4ae;
  --jwt-code-bg: #101827;
  --jwt-code-text: #e5edf7;
  --jwt-header: #7db4ff;
  --jwt-payload: #c4a7ff;
  --jwt-signature: #ffae7a;
  --jwt-font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;
  --jwt-font-code: "Cascadia Code", Consolas, monospace;
  --jwt-content-width: 1200px;
  --jwt-page-gutter: 32px;
  --jwt-border-width: 1px;
  --jwt-radius-panel: 12px;
  --jwt-radius-control: 8px;
  --jwt-radius-inner: 7px;
  --jwt-control-height: 38px;
}

/* Page frame */
.jwt-decoder-page,
.jwt-decoder-page * {
  box-sizing: border-box;
}

.jwt-decoder-page [hidden] {
  display: none !important;
}

.jwt-decoder-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;
}

.jwt-decoder-page {
  margin: 0;
  background: var(--jwt-bg);
  color: var(--jwt-text);
  font-family: var(--jwt-font-ui);
}

.jwt-decoder-main {
  width: min(var(--jwt-content-width), calc(100% - var(--jwt-page-gutter)));
  margin: 0 auto;
  padding: 28px 0 52px;
}

.jwt-decoder-page-header {
  margin-bottom: 18px;
}

.jwt-decoder-page-header h1 {
  margin: 10px 0 6px;
  font-size: clamp(1.65rem, 3vw, 2.2rem);
}

.jwt-decoder-page-header p,
.jwt-decoder-panel-heading p {
  margin: 0;
  color: var(--jwt-muted);
}

.jwt-decoder-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
}

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

/* Shared panels */
.jwt-decoder-notice,
.jwt-decoder-panel {
  border: var(--jwt-border-width) solid var(--jwt-border);
  border-radius: var(--jwt-radius-panel);
  background: var(--jwt-panel);
}

.jwt-decoder-notice {
  margin-bottom: 14px;
  padding: 12px 16px;
  border-color: var(--jwt-info-border);
  background: var(--jwt-info-bg);
  color: var(--jwt-info);
}

.jwt-decoder-panel {
  margin-bottom: 16px;
  padding: 18px;
}

.jwt-decoder-panel-heading,
.jwt-decoder-card-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.jwt-decoder-panel-heading {
  align-items: flex-start;
  margin-bottom: 16px;
}

.jwt-decoder-panel-heading h2,
.jwt-decoder-panel h3 {
  margin-top: 0;
}

.jwt-decoder-panel-heading h2 {
  margin-bottom: 4px;
  font-size: 1.15rem;
}

/* Input and controls */
.jwt-decoder-input-label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 7px;
  font-weight: 700;
}

.jwt-decoder-input-label span {
  color: var(--jwt-muted);
  font-size: 0.82rem;
  font-weight: 400;
}

.jwt-decoder-input,
.jwt-decoder-number-label input,
.jwt-decoder-button {
  border: var(--jwt-border-width) solid var(--jwt-border);
  border-radius: var(--jwt-radius-control);
  background: var(--jwt-panel);
  color: var(--jwt-text);
  font: inherit;
}

.jwt-decoder-input {
  display: block;
  width: 100%;
  min-height: 190px;
  padding: 13px;
  resize: vertical;
  font-family: var(--jwt-font-code);
  font-size: 0.9rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.jwt-decoder-input:focus,
.jwt-decoder-number-label input:focus,
.jwt-decoder-button:focus-visible,
.jwt-decoder-code-card pre:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--jwt-focus) 55%, transparent);
  outline-offset: 2px;
}

.jwt-decoder-toolbar,
.jwt-decoder-action-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.jwt-decoder-toolbar {
  margin-top: 12px;
  padding: 11px 12px;
  border-radius: 9px;
  background: var(--jwt-soft);
}

.jwt-decoder-number-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 700;
}

.jwt-decoder-number-label input {
  width: 88px;
  min-height: 34px;
  padding: 5px 9px;
}

.jwt-decoder-shortcut {
  color: var(--jwt-muted);
  font-size: 0.82rem;
}

.jwt-decoder-action-row {
  margin-top: 14px;
}

/* Actions and status */
.jwt-decoder-button {
  min-height: var(--jwt-control-height);
  padding: 7px 15px;
  font-weight: 700;
  cursor: pointer;
}

.jwt-decoder-button:hover:not(:disabled) {
  background: var(--jwt-soft);
}

.jwt-decoder-button--primary {
  border-color: var(--jwt-primary);
  background: var(--jwt-primary);
  color: #ffffff;
}

.jwt-decoder-button--primary:hover:not(:disabled) {
  background: var(--jwt-primary-hover);
}

.jwt-decoder-button--compact {
  min-height: 32px;
  padding: 4px 10px;
  font-size: 0.82rem;
}

.jwt-decoder-button:disabled {
  opacity: .48;
  cursor: not-allowed;
}

.jwt-decoder-message {
  --jwt-state-border: var(--jwt-info-border);
  --jwt-state-bg: var(--jwt-info-bg);
  --jwt-state-text: var(--jwt-info);
  margin: 14px 0 0;
  padding: 10px 12px;
  border: var(--jwt-border-width) solid var(--jwt-state-border);
  border-radius: var(--jwt-radius-control);
  background: var(--jwt-state-bg);
  color: var(--jwt-state-text);
}

.jwt-decoder-message[data-type="success"],
.jwt-decoder-badge[data-type="success"] {
  --jwt-state-border: var(--jwt-success-border);
  --jwt-state-bg: var(--jwt-success-bg);
  --jwt-state-text: var(--jwt-success);
}

.jwt-decoder-message[data-type="warning"],
.jwt-decoder-badge[data-type="warning"] {
  --jwt-state-border: var(--jwt-warning-border);
  --jwt-state-bg: var(--jwt-warning-bg);
  --jwt-state-text: var(--jwt-warning);
}

.jwt-decoder-message[data-type="error"],
.jwt-decoder-badge[data-type="error"] {
  --jwt-state-border: var(--jwt-error-border);
  --jwt-state-bg: var(--jwt-error-bg);
  --jwt-state-text: var(--jwt-error);
}

/* Result summary */
.jwt-decoder-result-heading {
  align-items: center;
}

.jwt-decoder-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 7px;
}

.jwt-decoder-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 9px;
  border: var(--jwt-border-width) solid var(--jwt-border);
  border-radius: 999px;
  background: var(--jwt-soft);
  font-size: 0.8rem;
  font-weight: 700;
}

.jwt-decoder-badge[data-type="success"],
.jwt-decoder-badge[data-type="warning"],
.jwt-decoder-badge[data-type="error"] {
  border-color: var(--jwt-state-border);
  background: var(--jwt-state-bg);
  color: var(--jwt-state-text);
}

.jwt-decoder-segments {
  margin-bottom: 16px;
  padding: 11px 12px;
  overflow-x: auto;
  border-radius: var(--jwt-radius-control);
  background: var(--jwt-code-bg);
  color: var(--jwt-code-text);
  white-space: nowrap;
}

.jwt-decoder-segment {
  font-family: var(--jwt-font-code);
  font-size: 0.85rem;
}

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

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

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

/* Decoded content */
.jwt-decoder-result-grid,
.jwt-decoder-detail-grid,
.jwt-decoder-about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.jwt-decoder-code-card,
.jwt-decoder-subsection {
  min-width: 0;
  padding: 14px;
  border: var(--jwt-border-width) solid var(--jwt-border);
  border-radius: var(--jwt-radius-control);
  background: var(--jwt-soft);
}

.jwt-decoder-card-heading {
  align-items: center;
  margin-bottom: 9px;
}

.jwt-decoder-card-heading h3,
.jwt-decoder-subsection h3 {
  margin-bottom: 0;
  font-size: 1rem;
}

.jwt-decoder-code-card pre {
  min-height: 260px;
  max-height: 500px;
  margin: 0;
  padding: 13px;
  overflow: auto;
  border-radius: var(--jwt-radius-inner);
  background: var(--jwt-code-bg);
  color: var(--jwt-code-text);
  font-family: var(--jwt-font-code);
  font-size: 0.86rem;
  line-height: 1.55;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.jwt-decoder-subsection {
  margin-top: 14px;
}

.jwt-decoder-subsection > h3 {
  margin-bottom: 12px;
}

/* Claims and signature details */
.jwt-decoder-table-wrap {
  overflow-x: auto;
}

.jwt-decoder-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--jwt-panel);
}

.jwt-decoder-table th,
.jwt-decoder-table td {
  padding: 9px 10px;
  border: var(--jwt-border-width) solid var(--jwt-border);
  text-align: left;
  vertical-align: top;
}

.jwt-decoder-table th {
  background: var(--jwt-soft);
  white-space: nowrap;
}

.jwt-decoder-table td:nth-child(2) {
  font-family: var(--jwt-font-code);
  overflow-wrap: anywhere;
}

.jwt-decoder-empty {
  margin: 9px 0 0;
  color: var(--jwt-muted);
}

.jwt-decoder-details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
}

.jwt-decoder-details > div {
  min-width: 0;
  padding: 9px;
  border: var(--jwt-border-width) solid var(--jwt-border);
  border-radius: var(--jwt-radius-inner);
  background: var(--jwt-panel);
}

.jwt-decoder-details dt {
  color: var(--jwt-muted);
  font-size: 0.78rem;
}

.jwt-decoder-details dd {
  margin: 3px 0 0;
  overflow-wrap: anywhere;
}

.jwt-decoder-signature-value {
  display: block;
  max-height: 85px;
  margin-top: 10px;
  padding: 9px;
  overflow: auto;
  border-radius: var(--jwt-radius-inner);
  background: var(--jwt-code-bg);
  color: var(--jwt-signature);
  font-family: var(--jwt-font-code);
  overflow-wrap: anywhere;
}

.jwt-decoder-warning-list {
  margin: 0;
  padding-left: 1.35rem;
}

.jwt-decoder-warning-list li + li {
  margin-top: 7px;
}

.jwt-decoder-warning-list [data-severity="error"] {
  color: var(--jwt-error);
}

.jwt-decoder-warning-list [data-severity="warning"] {
  color: var(--jwt-warning);
}

/* Tool information */
.jwt-decoder-about h2 {
  margin-top: 0;
  font-size: 1.15rem;
}

.jwt-decoder-about-grid {
  margin-top: 18px;
}

.jwt-decoder-about li + li {
  margin-top: 5px;
}

.jwt-decoder-privacy {
  margin: 18px 0 0;
  padding: 11px 13px;
  border: var(--jwt-border-width) solid var(--jwt-info-border);
  border-radius: var(--jwt-radius-control);
  background: var(--jwt-info-bg);
  color: var(--jwt-info);
}

/* System dark theme */
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --jwt-bg: #0f141b;
    --jwt-panel: #151b23;
    --jwt-soft: #1d2530;
    --jwt-border: #3a4656;
    --jwt-text: #e6edf3;
    --jwt-muted: #9ba8b7;
    --jwt-info: #9cdcff;
    --jwt-info-bg: #10293a;
    --jwt-info-border: #285875;
    --jwt-success: #85d4aa;
    --jwt-success-bg: #123126;
    --jwt-success-border: #2d6549;
    --jwt-warning: #f3c777;
    --jwt-warning-bg: #35290f;
    --jwt-warning-border: #6d5626;
    --jwt-error: #ffaaa3;
    --jwt-error-bg: #3a1b1d;
    --jwt-error-border: #7d383b;
  }
}

/* Responsive layout */
@media (max-width: 780px) {
  /* Reduce the outer gutter and preserve the existing panel density. */
  .jwt-decoder-main {
    width: calc(100% - 20px);
    padding-top: 18px;
  }

  .jwt-decoder-panel {
    padding: 14px;
  }

  /* Stack headings before collapsing the content grids. */
  .jwt-decoder-panel-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .jwt-decoder-badges {
    justify-content: flex-start;
  }

  .jwt-decoder-result-grid,
  .jwt-decoder-detail-grid,
  .jwt-decoder-about-grid {
    grid-template-columns: 1fr;
  }

  .jwt-decoder-input {
    min-height: 220px;
  }
}

@media (max-width: 480px) {
  /* Keep primary actions and detail cards usable on narrow screens. */
  .jwt-decoder-action-row .jwt-decoder-button {
    flex: 1 1 calc(50% - 8px);
  }

  .jwt-decoder-number-label {
    width: 100%;
    justify-content: space-between;
  }

  .jwt-decoder-details {
    grid-template-columns: 1fr;
  }
}