/* CSS Design System & Theme Settings - Team Kanban & Leader Dashboard */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Colors */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent-color: #6366f1;
  --accent-color-hover: #4f46e5;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
  --border-color: rgba(0, 0, 0, 0.08);
  --hover-border: rgba(99, 102, 241, 0.4);
  
  /* Status Colors */
  --color-todo: #64748b;
  --color-inprogress: #2563eb;
  --color-review: #d97706;
  --color-done: #059669;

  --bg-todo-alpha: rgba(100, 116, 139, 0.1);
  --bg-inprogress-alpha: rgba(37, 99, 235, 0.1);
  --bg-review-alpha: rgba(217, 119, 6, 0.1);
  --bg-done-alpha: rgba(5, 150, 105, 0.1);

  /* Priorities */
  --priority-high: #dc2626;
  --priority-medium: #ea580c;
  --priority-low: #2563eb;
  
  /* Fonts & Shadows */
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-premium: 0 20px 25px -5px rgba(0, 0, 0, 0.04), 0 10px 10px -5px rgba(0, 0, 0, 0.02), inset 0 1px 0 rgba(255, 255, 255, 0.8);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-circle: 50%;
  
  /* Layout */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --container-width: 1400px;
}

/* Reset */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.04) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(168, 85, 247, 0.04) 0px, transparent 50%);
  background-attachment: fixed;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-color);
}

/* App Header */
.app-header {
  background-color: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo {
  width: 40px;
  height: 40px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.5rem;
  color: white;
  box-shadow: 0 0 15px rgba(99, 102, 241, 0.4);
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  background: linear-gradient(to right, #0f172a, #475569);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Nav Menu */
.app-nav {
  display: flex;
  background-color: rgba(0, 0, 0, 0.04);
  border: 1px solid var(--border-color);
  padding: 0.25rem;
  border-radius: var(--radius-md);
  gap: 0.25rem;
}

.nav-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-main);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}

.nav-btn:hover {
  color: var(--text-primary);
  background-color: rgba(0, 0, 0, 0.02);
}

.nav-btn.active {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid rgba(0, 0, 0, 0.04);
  box-shadow: var(--shadow-sm);
}

/* Controls (Member selector in header) */
.header-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.member-selector-container {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: rgba(0, 0, 0, 0.03);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-md);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-5px);
  transition: all var(--transition-normal);
}

.member-selector-container.show {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.select-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.custom-select {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.4rem 2rem 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-main);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%239ca3af'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1rem;
}

.custom-select:focus {
  border-color: var(--accent-color);
}

/* Main Content Area */
.app-content {
  flex: 1;
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 2rem;
}

/* Page Views */
.view-panel {
  display: none;
  animation: fadeIn var(--transition-normal) forwards;
}

.view-panel.active {
  display: block;
}

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

/* Leader Dashboard Styles */
.dashboard-title-area {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.dashboard-title-area h2 {
  font-size: 1.75rem;
  font-weight: 800;
  background: linear-gradient(135deg, #0f172a 0%, #475569 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.add-task-btn {
  background: var(--accent-gradient);
  border: none;
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
  transition: all var(--transition-fast);
}

.add-task-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

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

/* KPI Stats Section */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
}

.stat-card.total::after { background: var(--accent-gradient); }
.stat-card.todo::after { background-color: var(--color-todo); }
.stat-card.inprogress::after { background-color: var(--color-inprogress); }
.stat-card.review::after { background-color: var(--color-review); }
.stat-card.done::after { background-color: var(--color-done); }

.stat-info h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 2.25rem;
  font-weight: 800;
}

.stat-icon {
  font-size: 2rem;
  opacity: 0.2;
}

/* Circular Success Chart inside Card */
.stat-card.success-rate {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.circular-progress {
  position: relative;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: conic-gradient(var(--color-done) 0deg, var(--bg-tertiary) 0deg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.circular-progress::before {
  content: "";
  position: absolute;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background-color: var(--bg-secondary);
}

.percentage-value {
  position: relative;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-done);
}

/* Dashboard Core Layout */
.dashboard-layout {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 2rem;
}

@media (max-width: 1024px) {
  .dashboard-layout {
    grid-template-columns: 1fr;
  }
}

.card-container {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-premium);
}

.card-header-area {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.card-header-area h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

/* Workload Table */
.workload-table-wrapper {
  overflow-x: auto;
}

.workload-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.workload-table th {
  padding: 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  text-transform: uppercase;
}

.workload-table td {
  padding: 1rem;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border-color);
}

.workload-table tr:last-child td {
  border-bottom: none;
}

.member-cell {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
}

.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 0.85rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.status-badge-grid {
  display: flex;
  gap: 0.4rem;
}

.mini-badge {
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
}

.mini-badge.todo { background: var(--bg-todo-alpha); color: var(--color-todo); }
.mini-badge.inprogress { background: var(--bg-inprogress-alpha); color: var(--color-inprogress); }
.mini-badge.review { background: var(--bg-review-alpha); color: var(--color-review); }
.mini-badge.done { background: var(--bg-done-alpha); color: var(--color-done); }

.workload-bar-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.workload-progress {
  flex: 1;
  height: 8px;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.workload-progress-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 4px;
  transition: width 0.5s ease;
}

.workload-percent {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  width: 30px;
}

/* Recent Tasks List in Dashboard */
.recent-tasks-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 480px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.recent-task-item {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.recent-task-item:hover {
  border-color: var(--hover-border);
  transform: translateX(4px);
}

.task-item-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.task-item-title {
  font-weight: 600;
  font-size: 0.925rem;
  color: var(--text-primary);
}

.task-item-priority {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 5px;
}

.priority-high { background-color: var(--priority-high); box-shadow: 0 0 6px var(--priority-high); }
.priority-medium { background-color: var(--priority-medium); box-shadow: 0 0 6px var(--priority-medium); }
.priority-low { background-color: var(--priority-low); box-shadow: 0 0 6px var(--priority-low); }

.task-item-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.task-item-assignee {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 500;
}

.task-item-deadline {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Kanban Board view styles */
.board-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.board-user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.board-user-info h2 {
  font-size: 1.75rem;
  font-weight: 800;
}

.board-user-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

/* Kanban Grid */
.kanban-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 1100px) {
  .kanban-board {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .kanban-board {
    grid-template-columns: 1fr;
  }
}

.kanban-column {
  background-color: #f1f5f9;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  min-height: 60vh;
}

.kanban-column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding: 0 0.5rem;
}

.column-title-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.column-bullet {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.column-bullet.todo { background-color: var(--color-todo); }
.column-bullet.inprogress { background-color: var(--color-inprogress); }
.column-bullet.review { background-color: var(--color-review); }
.column-bullet.done { background-color: var(--color-done); }

.column-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.task-count-badge {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.5rem;
  border-radius: 10px;
  border: 1px solid var(--border-color);
}

/* Kanban Zone */
.kanban-cards-zone {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  min-height: 400px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.kanban-cards-zone.drag-over {
  background-color: rgba(99, 102, 241, 0.04);
  outline: 2px dashed rgba(99, 102, 241, 0.4);
  outline-offset: -2px;
}

/* Kanban Card */
.task-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  cursor: grab;
  user-select: none;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1), 
              border-color 0.2s ease, 
              box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}

.task-card:hover {
  transform: translateY(-2px) scale(1.01);
  border-color: var(--hover-border);
  box-shadow: var(--shadow-lg);
}

.task-card:active {
  cursor: grabbing;
}

.task-card.dragging {
  opacity: 0.4;
  transform: scale(0.95);
  box-shadow: none;
}

.card-top-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.priority-tag {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.priority-tag.high { background-color: #fee2e2; color: #dc2626; }
.priority-tag.medium { background-color: #ffedd5; color: #ea580c; }
.priority-tag.low { background-color: #dbeafe; color: #2563eb; }

.task-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 0.5rem;
}

.task-card p.desc {
  font-size: 0.825rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.deadline-badge {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-weight: 500;
}

.deadline-badge.overdue {
  color: var(--priority-high);
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(15, 23, 42, 0.40);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.show {
  opacity: 1;
  pointer-events: all;
}

.modal-content {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  width: 90%;
  max-width: 550px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-premium);
  overflow: hidden;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-normal);
}

.modal-overlay.show .modal-content {
  transform: scale(1) translateY(0);
}

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.close-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  font-family: var(--font-main);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  border-color: var(--accent-color);
}

textarea.form-control {
  resize: vertical;
  min-height: 100px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 480px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.modal-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

.btn {
  padding: 0.6rem 1.25rem;
  font-family: var(--font-main);
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary {
  background-color: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.btn-secondary:hover {
  color: var(--text-primary);
  background-color: rgba(0, 0, 0, 0.04);
}

.btn-primary {
  background: var(--accent-gradient);
  border: none;
  color: white;
}

.btn-primary:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

.btn-danger {
  background-color: #fee2e2;
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #dc2626;
}

.btn-danger:hover {
  background-color: #fecaca;
}

/* Utilities */
.text-center { text-align: center; }
.mt-4 { margin-top: 1rem; }

/* Dragging visual helpers */
.column-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 0.8rem;
  height: 100px;
  pointer-events: none;
}