/* Global Design Tokens & Variables (DBS Bangkok Light Theme) */
:root {
  /* Colors from school website */
  --bg-primary: #f9f8f7; /* --color-bg from dbs website */
  --bg-card: #ffffff; /* --color-text-white from dbs website */
  --bg-card-hover: #e5ebf4; /* --color-blue-light from dbs website */
  --border-color: rgba(45, 56, 131, 0.16); /* subtle navy borders */
  --border-glow: rgba(196, 171, 121, 0.3);
  
  --text-primary: #232740; /* --color-text-main from dbs website */
  --text-secondary: #585b72; /* --color-text-light from dbs website */
  --text-muted: #8f9fc1; /* --color-blue-4 from dbs website */
  
  /* Status Colors mapped to school theme */
  --color-todo: #2d3883; /* Navy */
  --color-progress: #c4ab79; /* Gold */
  --color-review: #4f57a6; /* Blue-3 */
  --color-done: #2e7d32; /* Green */
  
  /* Alert Colors */
  --color-urgent: #c4ab79;
  --color-overdue: #c62828;
  
  --font-main: 'Poppins', 'Sarabun', sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --glass-blur: blur(8px);
}

/* Base Styles */
* {
  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;
  position: relative;
  overflow-x: hidden;
}

/* Vibrant Animated Background Elements */
.glass-bg {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  background: radial-gradient(circle at 10% 20%, rgba(45, 56, 131, 0.04) 0%, transparent 40%),
              radial-gradient(circle at 90% 80%, rgba(196, 171, 121, 0.04) 0%, transparent 45%),
              #f9f8f7;
}

/* Header Styling */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  font-size: 1.75rem;
  background: linear-gradient(135deg, #c4ab79, #2e3982);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 4px rgba(196, 171, 121, 0.25));
}

.logo-area h1 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.controls-area {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.control-group label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* Custom Select & Buttons */
.custom-select {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  padding: 0.5rem 2rem 0.5rem 1rem;
  font-family: var(--font-main);
  font-size: 0.875rem;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23232740' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1rem;
  transition: var(--transition-smooth);
}

.custom-select:focus {
  border-color: var(--color-progress);
  box-shadow: 0 0 0 2px var(--border-glow);
}

.btn {
  padding: 0.6rem 1.25rem;
  border-radius: 8px;
  font-family: var(--font-main);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  border: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition-smooth);
}

.btn-primary {
  background: linear-gradient(135deg, #c4ab79, #2e3982);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(196, 171, 121, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(196, 171, 121, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

.btn-danger {
  background: rgba(255, 23, 68, 0.15);
  color: #ff5252;
  border: 1px solid rgba(255, 23, 68, 0.3);
}

.btn-danger:hover {
  background: rgba(255, 23, 68, 0.25);
  transform: translateY(-1px);
}

.hide {
  display: none !important;
}

/* App Container and View Switcher */
.app-container {
  max-width: 1400px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.view-panel {
  display: none;
}

.view-panel.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Glass Card styling */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(45, 56, 131, 0.04);
  transition: var(--transition-smooth);
}

.card:hover {
  border-color: rgba(45, 56, 131, 0.2);
  box-shadow: 0 8px 32px rgba(45, 56, 131, 0.08);
}

/* Manager Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 1.5rem;
}

.stats-card {
  grid-column: span 2;
}

.stats-card h2, .alert-card h2, .workload-card h2, .task-list-card h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.stats-container {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}

.stat-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.stat-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--text-secondary);
}

.stat-box.todo::before { background: var(--color-todo); }
.stat-box.progress::before { background: var(--color-progress); }
.stat-box.review::before { background: var(--color-review); }
.stat-box.done::before { background: var(--color-done); }

.stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-box.todo .stat-num { color: var(--color-todo); }
.stat-box.progress .stat-num { color: var(--color-progress); }
.stat-box.review .stat-num { color: var(--color-review); }
.stat-box.done .stat-num { color: var(--color-done); }

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

/* Alert / Overdue Panel styling */
.alert-card {
  max-height: 320px;
  overflow-y: auto;
}

.alerts-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.alert-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  border-left: 4px solid var(--text-muted);
}

.alert-item.overdue {
  border-left-color: var(--color-overdue);
  background: rgba(255, 23, 68, 0.05);
}

.alert-item.urgent {
  border-left-color: var(--color-urgent);
  background: rgba(255, 145, 0, 0.05);
}

.alert-icon {
  font-size: 1.2rem;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: 500;
  font-size: 0.875rem;
  margin-bottom: 0.15rem;
}

.alert-meta {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.alert-badge {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.alert-badge.overdue {
  background: var(--color-overdue);
  color: #fff;
}

.alert-badge.urgent {
  background: var(--color-urgent);
  color: #000;
}

/* Workload Card Styling */
.workload-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.workload-item {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.workload-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}

.workload-name {
  font-weight: 500;
}

.workload-bar-bg {
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.workload-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  background: linear-gradient(90deg, var(--color-todo), var(--color-review));
}

/* Tasks Table Styling */
.task-list-card {
  grid-column: span 2;
}

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

.card-header h2 {
  margin-bottom: 0;
}

.filter-controls {
  display: flex;
  gap: 0.75rem;
}

.filter-select {
  padding: 0.4rem 1.75rem 0.4rem 0.75rem;
  font-size: 0.8rem;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.task-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.task-table th, .task-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.task-table th {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.task-table tbody tr {
  transition: var(--transition-smooth);
}

.task-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

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

.member-profile {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.member-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2d3883, #c4ab79);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  box-shadow: 0 4px 10px rgba(45, 56, 131, 0.12);
}

#lbl-board-member-name {
  font-size: 1.25rem;
  font-weight: 600;
}

#lbl-board-member-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

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

.kanban-column {
  background: rgba(45, 56, 131, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
  min-height: 500px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--border-color);
}

.column-header.todo { border-bottom-color: var(--color-todo); color: var(--color-todo); }
.column-header.progress { border-bottom-color: var(--color-progress); color: var(--color-progress); }
.column-header.review { border-bottom-color: var(--color-review); color: var(--color-review); }
.column-header.done { border-bottom-color: var(--color-done); color: var(--color-done); }

.column-count {
  background: rgba(45, 56, 131, 0.08);
  color: var(--text-primary);
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
}

.kanban-cards {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 450px;
  transition: var(--transition-smooth);
}

.kanban-cards.drag-over {
  background: rgba(45, 56, 131, 0.05);
  outline: 2px dashed rgba(45, 56, 131, 0.25);
  outline-offset: 4px;
  border-radius: 8px;
}

/* Kanban Cards & Overdue/Urgent Indicators */
.task-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1rem;
  box-shadow: 0 4px 12px rgba(45, 56, 131, 0.03);
  cursor: grab;
  user-select: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  position: relative;
}

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

.task-card.dragging {
  opacity: 0.4;
  transform: scale(0.96);
}

.task-card:hover {
  border-color: rgba(255, 255, 255, 0.18);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  transform: translateY(-2px);
}

.task-card.overdue {
  border-left: 3px solid var(--color-overdue);
}

.task-card.urgent {
  border-left: 3px solid var(--color-urgent);
}

.task-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  line-height: 1.4;
}

.task-card p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.task-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.7rem;
}

.task-card-dept {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-weight: 500;
}

.task-card-date {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Overdue and Warning styling inside cards */
.overdue .task-card-date {
  color: var(--color-overdue);
  font-weight: 600;
}

.urgent .task-card-date {
  color: var(--color-urgent);
  font-weight: 600;
}

/* Status Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge.todo { background: rgba(0, 242, 254, 0.1); color: var(--color-todo); }
.badge.in-progress { background: rgba(255, 210, 0, 0.1); color: var(--color-progress); }
.badge.review { background: rgba(189, 0, 255, 0.1); color: var(--color-review); }
.badge.done { background: rgba(0, 230, 118, 0.1); color: var(--color-done); }

/* Dialog modal style */
.glass-dialog {
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 16px;
  margin: auto;
  padding: 2rem;
  width: 90%;
  max-width: 500px;
  color: var(--text-primary);
  box-shadow: 0 20px 50px rgba(45, 56, 131, 0.15);
  outline: none;
}

.glass-dialog::backdrop {
  background: rgba(35, 39, 64, 0.4);
  backdrop-filter: blur(4px);
}

.glass-dialog h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

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

.form-group input[type="text"], .form-group textarea, .form-group input[type="date"], .form-group input[type="email"] {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.875rem;
  outline: none;
  transition: var(--transition-smooth);
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--color-todo);
  box-shadow: 0 0 0 2px var(--border-glow);
}

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

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.75rem;
  border-top: 1px solid var(--border-color);
  padding-top: 1.25rem;
}

/* Custom Table Actions */
.btn-table {
  background: none;
  border: none;
  color: var(--color-todo);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 500;
  text-decoration: underline;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.btn-table:hover {
  background: rgba(0, 242, 254, 0.1);
}

/* Responsive adjustments */
@media (max-width: 1024px) {
  .kanban-board {
    grid-template-columns: repeat(2, 1fr);
  }
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  .stats-card, .task-list-card {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
    padding: 1rem;
  }
  .controls-area {
    flex-wrap: wrap;
    justify-content: space-between;
  }
  .kanban-board {
    grid-template-columns: 1fr;
  }
  .stats-container {
    grid-template-columns: 1fr 1fr;
  }
  .stats-container .stat-box:first-child {
    grid-column: span 2;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}

/* Login screen overlay style */
.login-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(249, 248, 247, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 10000;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login-card {
  width: 90%;
  max-width: 420px;
  padding: 2.5rem 2rem;
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 40px rgba(45, 56, 131, 0.1);
  background: #ffffff;
  animation: loginCardFadeIn 0.4s ease-out;
}

@keyframes loginCardFadeIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}