:root {
  --panel-bg: color-mix(in srgb, var(--surface) 92%, var(--accent-soft));
}

.tool-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 20px;
}

.tool-header .lead {
  max-width: 60ch;
}

.trust-line {
  margin-bottom: 1.2rem;
  color: var(--muted);
  font-weight: 600;
}

.mobile-tabs {
  display: none;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.decoder-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.3fr);
  gap: 1.25rem;
  align-items: start;
}

.input-card {
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.input-controls {
  display: grid;
  gap: 0.75rem;
}

.field {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  color: var(--muted);
  font-size: 0.9rem;
}

.field select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.6rem 0.8rem;
  background: var(--surface);
  color: var(--text);
}

.compact-field {
  min-width: 190px;
}

.compact-field span {
  font-size: 0.78rem;
}

.compact-field select {
  padding: 0.45rem 0.6rem;
  font-size: 0.85rem;
}

.input-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.jwt-text {
  min-height: 260px;
  border-radius: 14px;
  border: 1px solid var(--border);
  padding: 0.8rem 1rem;
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  background: var(--panel-bg);
  color: var(--text);
  resize: vertical;
}

.status-row {
  min-height: 1.2rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.status-row.is-error {
  color: var(--danger, #e25555);
  font-weight: 600;
}

.status-row.is-valid {
  color: #2ecc71;
  font-weight: 600;
}

.status-row.is-warn {
  color: #f7b731;
  font-weight: 600;
}

.inspect-stack {
  display: grid;
  gap: 1.2rem;
}

.panel-card {
  padding: 1rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.panel-body {
  display: grid;
  gap: 0.8rem;
}

.json-view {
  display: grid;
  grid-template-columns: 52px 1fr;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel-bg);
  overflow: hidden;
  max-height: 320px;
}

.code-lines {
  padding: 0.6rem 0.8rem;
  display: block;
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text);
  overflow: auto;
}

.line-numbers {
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  color: var(--muted);
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.85rem;
  line-height: 1.55;
  padding: 0.6rem 0.5rem;
  text-align: right;
  user-select: none;
  overflow: hidden;
}

.line-numbers span {
  display: block;
  margin: 0;
  line-height: 1.55;
}

.line-numbers div {
  display: block;
  margin: 0;
  line-height: 1.55;
}

.json-line {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  white-space: pre;
  line-height: 1.55;
  min-height: calc(0.88rem * 1.55);
}

.json-toggle {
  width: 0.95em;
  height: 0.95em;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  color: var(--text);
  font-size: 0.65em;
  line-height: 1;
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  flex: 0 0 auto;
  padding: 0;
}

.json-toggle::before {
  content: "";
  font-size: 0.7rem;
  line-height: 1;
}

.json-toggle[aria-expanded="false"] {
  transform: rotate(-90deg);
}

.json-toggle.placeholder {
  visibility: hidden;
}

.claims-view table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.claims-view th,
.claims-view td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--border);
}

.claims-view th {
  color: var(--muted);
  font-weight: 600;
}

.claims-view tr:last-child td {
  border-bottom: none;
}

.claims-view .status-pill {
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  display: inline-flex;
}

.status-valid { background: color-mix(in srgb, #2ecc71 20%, transparent); color: #2ecc71; }
.status-warn { background: color-mix(in srgb, #f7b731 20%, transparent); color: #f7b731; }
.status-error { background: color-mix(in srgb, #e25555 20%, transparent); color: #e25555; }

.signature-box {
  border-radius: 12px;
  border: 1px dashed var(--border);
  padding: 0.8rem;
  font-family: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.88rem;
  color: var(--text);
  background: var(--panel-bg);
  word-break: break-all;
  min-height: 70px;
}

.signature-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
}

.how-it-works {
  margin-top: 2rem;
  background: var(--surface-muted);
  border-radius: 14px;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border);
}

.how-it-works summary {
  cursor: pointer;
  font-weight: 600;
}

.how-it-works ul {
  margin: 0.8rem 0 0 1.2rem;
  color: var(--muted);
}

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

@media (max-width: 1100px) {
  .decoder-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .panel-actions,
  .input-actions {
    width: 100%;
  }

  .panel-actions .btn,
  .input-actions .btn {
    width: 100%;
  }
}

@media (max-width: 720px) {
  .tool-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .mobile-tabs {
    display: inline-flex;
  }

  .decoder-layout[data-active="input"] .inspect-stack {
    display: none;
  }

  .decoder-layout[data-active="header"] .inspect-stack > :not(#headerPanel) {
    display: none;
  }

  .decoder-layout[data-active="payload"] .inspect-stack > :not(#payloadPanel) {
    display: none;
  }

  .decoder-layout[data-active="signature"] .inspect-stack > :not(#signaturePanel) {
    display: none;
  }

  .decoder-layout[data-active="header"] .input-card,
  .decoder-layout[data-active="payload"] .input-card,
  .decoder-layout[data-active="signature"] .input-card {
    display: none;
  }
}

h1, h2 {
  word-break: break-word;
}