/* ================================================================
   System Development Management Kanban — Dark Theme Stylesheet
   DESIGN.md Section 3: Page/Component Designs
   ================================================================ */

/* ── CSS Custom Properties ── */
:root {
  --bg-primary: #0f1117;
  --bg-card: #1a1d27;
  --bg-column: #141620;
  --bg-hover: #252838;
  --accent: #6c8cff;
  --teal: #4ecdc4;
  --text-primary: #e8e8ed;
  --text-secondary: #8b8fa3;
  --text-muted: #6b6f82;
  --border: #2a2d3a;
  --border-focus: #6c8cff;
  --danger: #ff6b6b;
  --success: #51cf66;
  --priority-high: #ff6b6b;
  --priority-med: #ffa502;
  --priority-low: #57606f;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.5);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  --transition: 0.2s ease;
}

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

html {
  font-size: 14px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* ── Header (fixed, gradient) ── */
.board-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1.25rem 2rem;
  background: linear-gradient(135deg, var(--bg-card) 0%, #1e2140 50%, var(--bg-card) 100%);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.board-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.board-header .subtitle {
  font-size: 0.85rem;
  color: var(--text-secondary);
  flex: 1;
  min-width: 200px;
}

/* ── Buttons ── */
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn-primary:hover {
  background: #5a7ae8;
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-hover);
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition);
}

.btn-secondary:hover {
  background: #2f3345;
}

.btn-advance {
  background: var(--bg-hover);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.btn-advance:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-detail {
  background: var(--bg-hover);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 0.35rem 0.7rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.btn-detail:hover {
  background: var(--teal);
  color: #fff;
  border-color: var(--teal);
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.btn-danger:hover {
  background: rgba(255, 107, 107, 0.15);
}

/* ── Main Layout ── */
.board-wrapper {
  max-width: 1400px;
  margin: 0 auto;
}

/* ── Kanban Board ── */
.kanban {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(200px, 280px);
  gap: 1rem;
  padding: 1.5rem 2rem;
  overflow-x: auto;
  min-height: calc(100vh - 140px);
}

/* ── Columns ── */
.column {
  background: var(--bg-column);
  border-radius: var(--radius);
  padding: 1rem;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 200px;
}

.column h2 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.column h2 .count {
  background: var(--bg-hover);
  color: var(--text-secondary);
  font-size: 0.72rem;
  padding: 0.1rem 0.5rem;
  border-radius: 99px;
  font-weight: 600;
}

/* Column-specific header accent colors */
.col-planned h2          { border-bottom-color: var(--text-muted); }
.col-interviewed h2      { border-bottom-color: var(--accent); }
.col-in-design h2        { border-bottom-color: #a29bfe; }
.col-designed h2         { border-bottom-color: var(--teal); }
.col-in-development h2   { border-bottom-color: var(--priority-med); }
.col-developed h2        { border-bottom-color: var(--success); }
.col-testing h2          { border-bottom-color: #eccc68; }
.col-deployed h2         { border-bottom-color: var(--success); }
.col-failed-halted h2    { border-bottom-color: var(--danger); }

/* ── Cards ── */
.cards {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
  overflow-y: auto;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  margin-bottom: 10px;
  transition: border-color var(--transition), box-shadow var(--transition);
  cursor: default;
}

.card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

/* Priority left border */
.card.priority-high {
  border-left: 3px solid var(--priority-high);
}

.card.priority-medium {
  border-left: 3px solid var(--priority-med);
}

.card.priority-low {
  border-left: 3px solid var(--priority-low);
}

/* Deployed cards: green-tinted background */
.col-deployed .card {
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(81, 207, 102, 0.06) 100%);
  border-color: rgba(81, 207, 102, 0.2);
}

.col-deployed .card:hover {
  border-color: var(--success);
}

/* Failed/halted cards: red-tinted background */
.col-failed-halted .card {
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255, 107, 107, 0.08) 100%);
  border-color: rgba(255, 107, 107, 0.2);
}

.col-failed-halted .card:hover {
  border-color: var(--danger);
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.card-badges {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 0.25rem;
  flex-wrap: wrap;
}

.badge {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.1rem 0.45rem;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge.priority-high {
  background: rgba(255, 107, 107, 0.15);
  color: var(--priority-high);
}

.badge.priority-med {
  background: rgba(255, 165, 2, 0.15);
  color: var(--priority-med);
}

.badge.priority-low {
  background: rgba(87, 96, 111, 0.3);
  color: var(--priority-low);
}

.stage-badge {
  font-weight: 600;
  color: var(--accent);
}

.card-actions {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.6rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

/* ── Empty Column ── */
.empty-column {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 2rem 0.5rem;
  line-height: 1.6;
}

/* ── Dialogs / Modals ── */
dialog {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  max-width: 600px;
  width: 90vw;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.65);
}

dialog form {
  padding: 1.5rem;
}

dialog h2 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

dialog label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

dialog input[type="text"],
dialog input[type="url"],
dialog textarea,
dialog select {
  width: 100%;
  padding: 0.55rem 0.75rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-family: var(--font);
  margin-top: 0.25rem;
  transition: border-color var(--transition);
}

dialog input:focus,
dialog textarea:focus,
dialog select:focus {
  outline: none;
  border-color: var(--border-focus);
}

dialog textarea {
  min-height: 60px;
  resize: vertical;
}

dialog menu {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 1.5rem;
  padding: 0;
  list-style: none;
}

.form-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.form-row label {
  flex: 1;
  margin-bottom: 0;
}

/* ── Detail Modal ── */
#detail-content {
  padding: 1.5rem;
}

.detail-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.detail-header h2 {
  margin-bottom: 0;
  flex: 1;
}

.detail-section {
  margin-bottom: 1rem;
}

.detail-section h3 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.detail-section p {
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.5;
}

.detail-section ul {
  list-style: none;
  padding: 0;
}

.detail-section ul li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 0.15rem 0;
  padding-left: 1rem;
  position: relative;
}

.detail-section ul li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent);
}

.detail-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.detail-field {
  font-size: 0.85rem;
}

.detail-field .label {
  color: var(--text-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.detail-field .value {
  color: var(--text-primary);
  font-weight: 600;
}

.detail-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.detail-close-btn {
  background: var(--bg-hover);
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition);
}

.detail-close-btn:hover {
  background: #2f3345;
}

/* ── Advance Modal ── */
#advance-content {
  padding: 1.5rem;
}

.advance-info {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  margin: 0.75rem 0;
  font-size: 0.9rem;
}

.advance-info .from-to {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.advance-info .from-to .arrow {
  color: var(--accent);
  font-size: 1.2rem;
}

/* ── Command Display (for agent-mediated approach) ── */
.command-box {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  margin: 0.75rem 0;
  font-family: "Courier New", monospace;
  font-size: 0.8rem;
  color: var(--teal);
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.4;
  max-height: 200px;
  overflow-y: auto;
}

.command-box .cmd-label {
  display: block;
  font-family: var(--font);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 0.35rem;
}

/* ── Notification Toast ── */
.notification-toast {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  z-index: 9999;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  max-width: 420px;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Footer ── */
footer {
  text-align: center;
  padding: 1rem 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ── Scrollbar styling ── */
.kanban::-webkit-scrollbar {
  height: 8px;
}

.kanban::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

.kanban::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}

.kanban::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

.cards::-webkit-scrollbar {
  width: 4px;
}

.cards::-webkit-scrollbar-track {
  background: transparent;
}

.cards::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

/* ── Responsive ── */
@media (max-width: 1200px) {
  .kanban {
    grid-auto-columns: minmax(200px, 260px);
  }
}

@media (max-width: 768px) {
  .board-header {
    padding: 1rem;
    flex-direction: column;
    align-items: stretch;
  }

  .board-header h1 {
    font-size: 1.2rem;
  }

  .kanban {
    grid-auto-flow: row;
    grid-template-columns: 1fr;
    padding: 1rem;
    overflow-x: visible;
    min-height: auto;
  }

  dialog {
    width: 95vw;
    max-width: 95vw;
  }

  .form-row {
    flex-direction: column;
    gap: 0.5rem;
  }

  .detail-fields {
    grid-template-columns: 1fr;
  }

  .detail-actions {
    flex-wrap: wrap;
  }
}

/* ── Utility ── */
.hidden {
  display: none !important;
}

.text-muted {
  color: var(--text-muted);
}

.mt-1 { margin-top: 0.5rem; }
.mb-1 { margin-bottom: 0.5rem; }