*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
  background-color: #f3f4f6;
  color: #111827;
}

#root {
  min-height: 100vh;
}

.app-shell {
  display: flex;
  min-height: 100vh;
}

.app-sidebar {
  width: 260px;
  background: #111827;
  color: #e5e7eb;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.app-sidebar h1 {
  font-size: 1.1rem;
  margin: 0;
}

.app-sidebar small {
  color: #9ca3af;
}

.app-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.app-nav button {
  width: 100%;
  text-align: left;
  padding: 0.4rem 0.6rem;
  border-radius: 0.375rem;
  border: none;
  background: transparent;
  color: #d1d5db;
  cursor: pointer;
  font-size: 0.9rem;
}

.app-nav button.active {
  background: #374151;
  color: #f9fafb;
}

.app-nav button:disabled {
  opacity: 0.5;
  cursor: default;
}

.app-main {
  flex: 1;
  padding: 1rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: white;
  border-radius: 0.75rem;
  padding: 1rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.12);
}

.card h2 {
  margin-top: 0;
  font-size: 1rem;
}

button.primary {
  background: #2563eb;
  color: white;
  border-radius: 0.5rem;
  padding: 0.45rem 0.9rem;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
}

button.primary:disabled {
  opacity: 0.6;
  cursor: default;
}

button.secondary {
  background: #e5e7eb;
  color: #111827;
  border-radius: 0.5rem;
  padding: 0.45rem 0.9rem;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.app-root {
  min-height: 100vh;
  background-color: #f3f4f6;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #111827;
  color: #e5e7eb;
  padding: 0.6rem 1rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.4);
}

.app-header-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.app-header h1 {
  font-size: 1rem;
  margin: 0;
}

.app-header small {
  color: #9ca3af;
  font-size: 0.8rem;
}

.app-logo {
  font-size: 1.4rem;
}

.app-main {
  padding: 0.75rem;
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Make cards full-width on mobile */
.card {
  width: 100%;
}

.download-link {
  display: inline-block;
  margin: 0.15rem 0;
  font-size: 0.85rem;
}

.card hr {
  border: none;
  border-top: 1px solid #e5e7eb;
}

.app-header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.app-version {
  flex: 0 0 auto;
  border-radius: 999px;
  background: #374151;
  color: #d1d5db;
  padding: 0.4rem 0.7rem;
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
}

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

.app-help-button {
  border: 1px solid #4b5563;
  border-radius: 999px;
  background: transparent;
  color: #e5e7eb;
  padding: 0.35rem 0.65rem;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  line-height: 1;
}

.app-help-button:hover,
.app-help-button:focus-visible {
  background: #374151;
  outline: none;
}

.help-dialog-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(15, 23, 42, 0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.help-dialog-panel {
  width: min(920px, 100%);
  max-height: min(88vh, 760px);
  overflow: auto;
  background: #ffffff;
  border-radius: 0.9rem;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.4);
}

.help-dialog-header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
}

.help-dialog-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.help-dialog-header p {
  margin: 0.35rem 0 0;
  color: #4b5563;
  font-size: 0.9rem;
  line-height: 1.45;
}

.help-close-button {
  flex: 0 0 auto;
  border: none;
  border-radius: 999px;
  width: 2rem;
  height: 2rem;
  background: #e5e7eb;
  color: #111827;
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
}

.help-dialog-content {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(260px, 0.8fr);
  gap: 1rem;
  padding: 1rem;
}

.help-section {
  border: 1px solid #e5e7eb;
  border-radius: 0.75rem;
  padding: 0.9rem;
  background: #f9fafb;
}

.help-section h3 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
}

.help-step-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.help-step {
  border-radius: 0.65rem;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  padding: 0.75rem;
}

.help-step h4 {
  margin: 0;
  font-size: 0.9rem;
}

.help-step p,
.help-note {
  margin: 0.35rem 0 0;
  color: #4b5563;
  font-size: 0.85rem;
  line-height: 1.45;
}

.shortcut-grid {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 0.45rem 0.75rem;
  align-items: center;
}

.shortcut-grid kbd {
  display: inline-flex;
  justify-content: center;
  border-radius: 0.4rem;
  border: 1px solid #d1d5db;
  background: #ffffff;
  padding: 0.2rem 0.45rem;
  font-size: 0.78rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  color: #111827;
  box-shadow: inset 0 -1px 0 #d1d5db;
  white-space: nowrap;
}

.shortcut-grid span {
  color: #4b5563;
  font-size: 0.85rem;
  line-height: 1.35;
}

.help-concepts {
  grid-column: 1 / -1;
}

.help-concepts dl {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0;
}

.help-concepts dl > div {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 0.65rem;
  padding: 0.75rem;
}

.help-concepts dt {
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
}

.help-concepts dd {
  margin: 0;
  color: #4b5563;
  font-size: 0.82rem;
  line-height: 1.4;
}

@media (max-width: 760px) {
  .help-dialog-content,
  .help-concepts dl {
    grid-template-columns: 1fr;
  }

  .app-header-content {
    align-items: flex-start;
  }
}

.merge-queue-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0.75rem 0;
}

.merge-queue-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid #bfdbfe;
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.8);
  padding: 0.6rem;
}

.merge-queue-order {
  border-radius: 999px;
  background: #dbeafe;
  color: #1e3a8a;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
}

.merge-queue-details {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
  font-size: 0.9rem;
}

.merge-queue-details strong {
  overflow-wrap: anywhere;
}

.merge-queue-details span {
  color: #4b5563;
  font-size: 0.8rem;
}

.merge-queue-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem;
}

.merge-queue-actions button.secondary {
  padding: 0.3rem 0.55rem;
  font-size: 0.8rem;
}

.merge-mode-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

.merge-mode-group label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.merge-warning {
  margin: 0.75rem 0 0;
  border: 1px solid #fed7aa;
  border-radius: 0.5rem;
  background: #fff7ed;
  color: #9a3412;
  padding: 0.55rem 0.65rem;
  font-size: 0.85rem;
}

@media (max-width: 700px) {
  .merge-queue-item {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .merge-queue-actions {
    justify-content: flex-start;
  }
}