.b18-security-tool {
  --b18-ink: var(--text, #132238);
  --b18-muted: var(--muted, #5b6b82);
  --b18-border: var(--border, #d9e1ec);
  --b18-panel: var(--surface-2, #f7f9fc);
  --b18-accent: #3156d3;
  --b18-warning: var(--warning, #8a4d00);
  color: var(--b18-ink);
  display: grid;
  gap: 1rem;
  margin: 0 auto;
  max-width: 1120px;
  padding: 1rem;
}

[data-theme="dark"] .b18-security-tool {
  --b18-accent: #90b4ff;
}

.b18-security-heading {
  align-items: end;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
}

.b18-security-heading > div > span {
  color: var(--b18-accent);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .14em;
}

.b18-security-heading h2,
.b18-security-heading p,
.b18-jwt-result h3 {
  margin: 0;
}

.b18-security-heading h2 {
  font-size: clamp(1.35rem, 3vw, 2rem);
}

.b18-security-heading p {
  color: var(--b18-muted);
  line-height: 1.55;
  max-width: 34rem;
}

.b18-jwt-warning,
.b18-jwt-warning-output {
  background: color-mix(in srgb, var(--b18-warning) 10%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--b18-warning) 36%, var(--b18-border));
  border-radius: .75rem;
  color: var(--b18-warning);
  line-height: 1.55;
  padding: .75rem .9rem;
}

.b18-jwt-controls,
.b18-jwt-editors,
.b18-jwt-output-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.b18-jwt-controls label {
  display: grid;
  font-weight: 700;
  gap: .4rem;
}

.b18-jwt-controls input,
.b18-jwt-controls select,
.b18-jwt-pane textarea {
  border: 1px solid var(--b18-border);
  border-radius: .55rem;
  font: inherit;
  min-width: 0;
  padding: .7rem .75rem;
}

.b18-jwt-pane {
  background: var(--b18-panel);
  border: 1px solid var(--b18-border);
  border-radius: .75rem;
  display: grid;
  gap: .55rem;
  padding: .75rem;
}

.b18-jwt-pane-head,
.b18-jwt-result-head {
  align-items: center;
  display: flex;
  gap: .75rem;
  justify-content: space-between;
}

.b18-jwt-pane-head label {
  font-weight: 800;
}

.b18-jwt-pane-head span,
.b18-jwt-result-head span {
  color: var(--b18-muted);
  font-size: .78rem;
}

.b18-jwt-pane textarea {
  background: var(--surface, #fff);
  color: var(--b18-ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  line-height: 1.5;
  min-height: 10rem;
  resize: vertical;
  width: 100%;
}

.b18-jwt-result {
  background: color-mix(in srgb, var(--b18-accent) 8%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--b18-accent) 30%, var(--b18-border));
  border-radius: .75rem;
  display: grid;
  gap: .7rem;
  padding: .85rem;
}

.b18-jwt-result > textarea {
  background: var(--surface, #fff);
  color: var(--b18-ink);
  border: 1px solid var(--b18-border);
  border-radius: .55rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  line-height: 1.5;
  min-height: 6rem;
  padding: .7rem;
  resize: vertical;
  width: 100%;
}

.b18-jwt-warning-output {
  font-family: inherit;
  margin: 0;
  white-space: pre-wrap;
}

.b18-jwt-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
}

.b18-security-status {
  border-left: 3px solid var(--b18-accent);
  color: var(--b18-muted);
  min-height: 1.5rem;
  padding: .35rem .65rem;
}

.b18-security-status[data-tone="error"] {
  border-color: var(--danger, #bb2f3c);
  color: var(--danger, #982431);
}

.b18-security-status[data-tone="success"] {
  border-color: var(--success, #15875c);
  color: var(--success, #126a4a);
}

.b18-security-tool button:focus-visible,
.b18-security-tool input:focus-visible,
.b18-security-tool select:focus-visible,
.b18-security-tool textarea:focus-visible {
  outline: 3px solid var(--focus, #3156d3);
  outline-offset: 2px;
}

@media (max-width: 700px) {
  .b18-security-heading,
  .b18-jwt-controls,
  .b18-jwt-editors,
  .b18-jwt-output-grid {
    grid-template-columns: 1fr;
  }

  .b18-security-heading {
    align-items: start;
    display: grid;
  }
}

@media (prefers-reduced-motion: reduce) {
  .b18-security-tool * {
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}