:root {
  --bg-app: #f4f5f7;
  --bg-column: #ebecf0;
  --bg-card: #ffffff;
  --border-color: #dfe1e6;
  --text-main: #172b4d;
  --text-muted: #5e6c84;
  --text-subtle: #7a869a;
  --primary: #0052cc;
  --primary-hover: #0747a6;
  --success: #36b37e;
  --success-bg: #e3fcef;
  --danger: #de350b;
  --danger-bg: #ffebe6;
  --tag-bg: #dfe1e6;
  --radius-card: 4px;
  --radius-column: 6px;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.4;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.kanboard-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
  padding: 0.6rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-shrink: 0;
}
.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.brand-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.brand-badge {
  background: var(--tag-bg);
  color: var(--text-muted);
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  font-family: var(--font-mono);
}
.backend-indicator {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 0.2rem 0.6rem;
  background: var(--bg-app);
  border-radius: 3px;
  border: 1px solid var(--border-color);
  cursor: pointer;
}
.backend-indicator:hover {
  background: #ffffff;
  border-color: #b3bac5;
}
.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #a5b2c6;
}
.dot.online { background: var(--success); }
.dot.offline { background: var(--danger); }

.header-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.search-box {
  background: var(--bg-app);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 0.35rem 0.6rem;
  font-size: 0.8rem;
  font-family: var(--font-sans);
  color: var(--text-main);
  outline: none;
  width: 14rem;
}
.search-box:focus {
  border-color: var(--primary);
  background: #ffffff;
}
.btn {
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.35rem 0.7rem;
  border-radius: 3px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: all 0.15s;
}
.btn:hover {
  background: var(--bg-app);
  border-color: #c1c7d0;
}
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}
.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
}

@media (max-width: 768px) {
  body {
    height: auto;
    min-height: 100vh;
    overflow-y: auto;
  }
  .kanboard-header {
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem 1rem;
    gap: 0.75rem;
  }
  .header-left, .header-right {
    width: 100%;
    justify-content: space-between;
  }
  .search-box {
    width: 100%;
    margin-bottom: 0.4rem;
  }
  .header-right {
    flex-direction: column;
    align-items: stretch;
  }
  .header-right .btn {
    justify-content: center;
  }
  .board-container {
    flex-direction: column;
    overflow-x: hidden;
    overflow-y: visible;
    padding: 0.75rem 1rem;
    gap: 0.75rem;
  }
  .kanban-column {
    width: 100%;
    min-width: 100%;
    max-height: none;
  }
  .column-header {
    cursor: pointer;
  }
  .column-header::after {
    content: " ▾";
    font-size: 0.8rem;
    color: var(--text-muted);
  }
  .kanban-column.collapsed .column-cards {
    display: none;
  }
  .kanban-column.collapsed .column-header::after {
    content: " ▸";
  }
}

.board-container {
  flex: 1;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  overflow-y: hidden;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.kanban-column {
  width: 320px;
  min-width: 320px;
  max-height: 100%;
  background: var(--bg-column);
  border-radius: var(--radius-column);
  display: flex;
  flex-direction: column;
  box-shadow: 0 1px 2px rgba(9, 30, 66, 0.08);
}
.column-header {
  padding: 0.65rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  user-select: none;
}
.column-count {
  background: rgba(9, 30, 66, 0.08);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.1rem 0.45rem;
  border-radius: 10px;
  color: var(--text-muted);
}
.column-cards {
  padding: 0 0.5rem 0.5rem 0.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.kanban-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 0.65rem 0.75rem;
  box-shadow: 0 1px 1px rgba(9, 30, 66, 0.12), 0 0 1px rgba(9, 30, 66, 0.15);
  border-left: 3px solid var(--primary);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: box-shadow 0.15s, transform 0.15s;
}
.kanban-card:hover {
  box-shadow: 0 3px 6px rgba(9, 30, 66, 0.18);
}
.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}
.card-name {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  word-break: break-all;
}
.card-path {
  font-size: 0.75rem;
  color: var(--text-subtle);
  font-family: var(--font-mono);
}
.card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.2rem;
  padding-top: 0.4rem;
  border-top: 1px dashed var(--border-color);
}
.cmd-preview {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 14rem;
}
.copy-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  padding: 0.15rem 0.4rem;
  font-size: 0.7rem;
  color: var(--text-muted);
  cursor: pointer;
}
.copy-btn:hover {
  background: var(--bg-app);
  color: var(--text-main);
  border-color: #b3bac5;
}

.doc-card {
  background: #fafbfc;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 0.6rem 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.doc-card h1, .doc-card h2, .doc-card h3 {
  font-size: 0.85rem;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}
.doc-card p {
  margin-bottom: 0.3rem;
}
.doc-card code {
  background: var(--tag-bg);
  padding: 0.1em 0.3em;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.board-msg {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  width: 100%;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(244, 245, 247, 0.96);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.modal-card {
  background: #ffffff;
  border-radius: 6px;
  padding: 1.5rem;
  max-width: 440px;
  width: 90%;
  box-shadow: 0 8px 24px rgba(9, 30, 66, 0.18);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border: 1px solid var(--border-color);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}
.input-row {
  display: flex;
  gap: 0.75rem;
}
.input-row .input-group {
  flex: 1;
}
.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 0.6rem;
}
.input-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-main);
}
.modal-input {
  width: 100%;
  padding: 0.5rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: var(--bg-app);
  outline: none;
}
.modal-input:focus {
  border-color: var(--primary);
  background: #ffffff;
}
.probe-status {
  font-size: 0.8rem;
  padding: 0.45rem 0.7rem;
  border-radius: 4px;
  margin-top: 0.4rem;
  line-height: 1.4;
}
.probe-status.loading {
  background: var(--bg-app);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}
.probe-status.error {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(222, 53, 11, 0.2);
}
.probe-status.success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(54, 179, 126, 0.2);
}
.btn-block {
  width: 100%;
  justify-content: center;
  padding: 0.55rem;
  font-size: 0.85rem;
}

#toast {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  background: #172b4d;
  color: #ffffff;
  padding: 0.5rem 1rem;
  border-radius: 3px;
  font-size: 0.8rem;
  box-shadow: 0 4px 8px rgba(9, 30, 66, 0.25);
  opacity: 0;
  transform: translateY(6px);
  transition: all 0.2s ease;
  pointer-events: none;
  z-index: 100;
}
#toast.show {
  opacity: 1;
  transform: translateY(0);
}