/* === Reset & Tokens === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0d1117;
  --surface:  #161b22;
  --card:     #21262d;
  --card-hover: #282e36;
  --border:   #30363d;
  --text:     #e6edf3;
  --text-muted: #8b949e;
  --text-dim: #484f58;

  --triage:      #d29922;
  --todo:        #58a6ff;
  --in-progress: #bc8cff;
  --in-review:   #3fb950;
  --done:        #8b949e;

  --radius:   8px;
  --radius-lg: 12px;
  --shadow:   0 4px 24px rgba(0,0,0,0.4);
}

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

/* === Header === */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-left { display: flex; align-items: baseline; gap: 8px; }
.logo { font-size: 20px; font-weight: 700; letter-spacing: -0.5px; }
.logo-sub { font-size: 13px; color: var(--text-muted); font-weight: 400; }

/* === Buttons === */
.btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { background: var(--card-hover); border-color: var(--text-muted); }

.btn-primary {
  background: #238636;
  border-color: #2ea043;
  color: #fff;
}
.btn-primary:hover { background: #2ea043; }

.btn-danger {
  background: #da3633;
  border-color: #f85149;
  color: #fff;
}
.btn-danger:hover { background: #f85149; }

.btn-sm { padding: 4px 10px; font-size: 12px; }

/* === Board === */
.board {
  display: grid;
  grid-template-columns: repeat(5, minmax(260px, 1fr));
  gap: 12px;
  padding: 16px 24px;
  height: calc(100vh - 57px);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-color: var(--border) transparent;
  scrollbar-width: thin;
}

.board::-webkit-scrollbar { height: 6px; }
.board::-webkit-scrollbar-track { background: transparent; }
.board::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.column {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  min-width: 260px;
  min-height: 0;
  transition: border-color 0.2s;
}

.column.drag-over {
  border-color: var(--todo);
  box-shadow: inset 0 0 0 1px var(--todo);
}

.column-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 14px 0;
}

.column-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-triage      { background: var(--triage); }
.dot-todo        { background: var(--todo); }
.dot-in-progress { background: var(--in-progress); }
.dot-in-review   { background: var(--in-review); }
.dot-done        { background: var(--done); }

.column-header h2 {
  font-size: 14px;
  font-weight: 600;
  flex: 1;
}

.column-count {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--card);
  padding: 2px 8px;
  border-radius: 10px;
  min-width: 24px;
  text-align: center;
}

.column-desc {
  font-size: 11px;
  color: var(--text-dim);
  padding: 4px 14px 10px;
}

.column-body {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.column-body::-webkit-scrollbar { width: 4px; }
.column-body::-webkit-scrollbar-track { background: transparent; }
.column-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* === Cards === */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  cursor: grab;
  transition: background 0.15s, border-color 0.15s, transform 0.15s, opacity 0.2s;
  user-select: none;
}
.card:hover {
  background: var(--card-hover);
  border-color: var(--text-muted);
}
.card:active { cursor: grabbing; }
.card.dragging { opacity: 0.4; transform: scale(0.98); }

.card-id {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  font-family: "SF Mono", Monaco, Consolas, monospace;
  margin-bottom: 4px;
}

.card-title {
  font-size: 13px;
  line-height: 1.4;
  word-break: break-word;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 11px;
  color: var(--text-dim);
}

.card-dep-badge {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  color: var(--triage);
}

/* === Modals === */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  justify-content: center;
  align-items: flex-start;
  padding-top: 10vh;
}
.modal-overlay.open { display: flex; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 480px;
  max-height: 80vh;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.modal-lg { width: 640px; }

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 15px; font-weight: 600; }

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 22px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}
.modal-close:hover { color: var(--text); }

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

/* === Forms === */
.form-group { padding: 0 20px; margin-top: 16px; }
.form-group:last-of-type { margin-bottom: 8px; }
.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.optional { font-weight: 400; text-transform: none; letter-spacing: 0; }

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--todo);
}
.form-group textarea { resize: vertical; }

/* === Detail Modal === */
.detail-title-row { display: flex; align-items: center; gap: 10px; }

.detail-id {
  font-family: "SF Mono", Monaco, Consolas, monospace;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}

.detail-column-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.badge-triage      { background: rgba(210,153,34,0.15); color: var(--triage); }
.badge-todo        { background: rgba(88,166,255,0.15); color: var(--todo); }
.badge-in-progress { background: rgba(188,140,255,0.15); color: var(--in-progress); }
.badge-in-review   { background: rgba(63,185,80,0.15); color: var(--in-review); }
.badge-done        { background: rgba(139,148,158,0.15); color: var(--done); }

.detail-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}

.detail-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.detail-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.detail-section { margin-top: 16px; }
.detail-section h4 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.detail-prompt {
  padding: 14px;
  font-size: 13px;
  line-height: 1.6;
  font-family: "SF Mono", Monaco, Consolas, monospace;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-muted);
}

.detail-deps { margin-top: 16px; }
.detail-deps h4 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.detail-dep-list {
  list-style: none;
  font-size: 13px;
}
.detail-dep-list li {
  padding: 4px 0;
  color: var(--todo);
  font-family: "SF Mono", Monaco, Consolas, monospace;
}

/* === Toasts === */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 200;
  display: flex;
  flex-direction: column-reverse;
  gap: 8px;
}

.toast {
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  color: #fff;
  animation: toast-in 0.25s ease-out;
  box-shadow: var(--shadow);
}
.toast-success { background: #238636; }
.toast-error   { background: #da3633; }
.toast-info    { background: #1f6feb; }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* === Empty state === */
.empty-column {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  font-size: 12px;
  color: var(--text-dim);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  margin: 4px;
}

/* === Mobile: horizontal scroll for board columns ===
   On narrow viewports (≤768px) the board switches from a 5-column grid to a
   horizontally-scrollable flex layout. Each column gets a minimum width so
   content remains readable, and snap-scrolling gives a polished swipe feel. */
@media (max-width: 768px) {
  html, body {
    overflow: hidden;
  }

  .board {
    display: flex;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    padding: 12px 12px;
    gap: 12px;
  }

  .board > .column {
    min-width: 280px;
    flex-shrink: 0;
    scroll-snap-align: start;
  }
}