/* 
  TaskFlow Premium Task Manager Stylesheet
  Aesthetics: Clean, Premium, Modern, Responsive
*/

:root {
  /* Color Palette */
  --bg-app: #f4f7fc;
  --bg-card: #ffffff;
  --bg-input: #f8fafc;
  --bg-hover: #f8fafc;

  /* Text Colors */
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  /* Accents & Brand Colors */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #eff6ff;
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;

  /* Status Colors (Pastel Backgrounds and Solid Texts) */
  --todo-bg: #eff6ff;
  --todo-badge-bg: #dbeafe;
  --todo-accent: #3b82f6;

  --progress-bg: #fff7ed;
  --progress-badge-bg: #ffedd5;
  --progress-accent: #f97316;

  --done-bg: #f0fdf4;
  --done-badge-bg: #dcfce7;
  --done-accent: #22c55e;

  /* Priority Tags */
  --priority-high-bg: #fef2f2;
  --priority-high-text: #ef4444;

  --priority-medium-bg: #fffbeb;
  --priority-medium-text: #d97706;

  --priority-low-bg: #f0fdf4;
  --priority-low-text: #15803d;

  /* Typography & Layout */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px 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(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-app: #0f172a;
  --bg-card: #1e293b;
  --bg-input: #0f172a;
  --bg-hover: #334155;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-light: #64748b;

  --border-color: #334155;
  --border-focus: #3b82f6;

  --color-primary-light: rgba(37, 99, 235, 0.15);

  --todo-bg: rgba(59, 130, 246, 0.08);
  --todo-badge-bg: rgba(59, 130, 246, 0.2);
  --todo-accent: #60a5fa;

  --progress-bg: rgba(249, 115, 22, 0.08);
  --progress-badge-bg: rgba(249, 115, 22, 0.2);
  --progress-accent: #fb923c;

  --done-bg: rgba(34, 197, 90, 0.08);
  --done-badge-bg: rgba(34, 197, 90, 0.2);
  --done-accent: #4ade80;

  --priority-high-bg: rgba(239, 68, 68, 0.15);
  --priority-high-text: #fca5a5;

  --priority-medium-bg: rgba(217, 119, 6, 0.15);
  --priority-medium-text: #fde047;

  --priority-low-bg: rgba(21, 128, 61, 0.15);
  --priority-low-text: #86efac;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Allow text selection inside input fields, textareas, and editable items for smooth editing */
input,
textarea,
[contenteditable="true"] {
  -webkit-user-select: text;
  -moz-user-select: text;
  -ms-user-select: text;
  user-select: text;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-app);
  color: var(--text-main);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Global synchronized theme transitions for all elements */
*, *::before, *::after {
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast) !important;
}

button,
input {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* App Container Layout */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 24px;
  max-width: 1440px;
  margin: 0 auto;
  gap: 20px;
}

/* Header Styles */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 16px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}
.fa-chevron-down {
  margin-left: 6px;
}
.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  font-size: 24px;
  color: var(--color-primary);
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition-fast);
}

.nav-item i {
  font-size: 16px;
}

.nav-item:hover {
  color: var(--text-main);
  background-color: var(--color-primary-light);
}

.nav-item.active {
  color: var(--color-primary);
  background-color: var(--color-primary-light);
}

[data-theme="dark"] .nav-item.active {
  color: #60a5fa; /* High contrast light blue text for dark theme navigation active state */
}

/* Header Right - Search, Notification, Profile */
.search-wrapper {
  position: relative;
  width: 240px;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
  font-size: 14px;
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: 10px 14px 10px 38px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-input);
  color: var(--text-main);
  font-size: 14px;
  transition: var(--transition-fast);
}

.search-input::placeholder {
  color: var(--text-light);
}

.search-input:focus {
  border-color: var(--border-focus);
  background-color: var(--bg-card);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.notification-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  background-color: var(--bg-card);
  transition: var(--transition-fast);
}

.notification-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-main);
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  background-color: var(--bg-card);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-hover);
  color: var(--color-primary);
  border-color: var(--color-primary);
  transform: scale(1.05);
}

.notification-badge {
  position: absolute;
  top: -2px;
  right: -2px;
  background-color: #ef4444;
  color: white;
  font-size: 10px;
  font-weight: 700;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--bg-card);
}

.profile-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition-fast);
}

.profile-avatar:hover {
  transform: scale(1.05);
  border-color: var(--color-primary);
}

.avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Toolbar Styles */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 4px;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.toolbar-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-fast);
}

.toolbar-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-main);
  border-color: var(--text-light);
}

.arrow-icon {
  font-size: 11px;
  margin-left: 4px;
}

.view-toggle {
  display: flex;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 4px;
  box-shadow: var(--shadow-sm);
}

.toggle-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.toggle-btn:hover {
  color: var(--text-main);
}

.toggle-btn.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* Kanban Board Layout */
.kanban-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(300px, 1fr));
  gap: 24px;
  align-items: start;
}

/* Column Styles */
.board-column {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Column Theme Details */
.todo-column {
  border-top: 4px solid var(--todo-accent);
}

.progress-column {
  border-top: 4px solid var(--progress-accent);
}

.done-column {
  border-top: 4px solid var(--done-accent);
}

.column-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.column-title-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
}

.column-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
}

.task-count-badge {
  font-size: 12px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
}

.todo-badge {
  background-color: var(--todo-badge-bg);
  color: var(--todo-accent);
}

.progress-badge {
  background-color: var(--progress-badge-bg);
  color: var(--progress-accent);
}

.done-badge {
  background-color: var(--done-badge-bg);
  color: var(--done-accent);
}

.column-options-btn {
  color: var(--text-light);
  padding: 4px;
  border-radius: 4px;
  transition: var(--transition-fast);
}

.column-options-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-hover);
}

/* Task List */
.task-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 150px;
}

/* Task Card Styles */
.task-card {
  position: relative;
  display: flex;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  cursor: grab;
}

.task-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--text-light);
}

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

/* Drag Handle */
.card-drag-handle {
  display: flex;
  align-items: flex-start;
  color: var(--text-light);
  margin-right: 12px;
  padding-top: 2px;
  font-size: 14px;
  cursor: grab;
  opacity: 0.5;
  transition: opacity var(--transition-fast);
}

.task-card:hover .card-drag-handle {
  opacity: 1;
}

.card-content {
  flex-grow: 1;
  min-width: 0; /* Prevents flex children from stretching the card width */
}

.task-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  word-break: break-word;
  overflow-wrap: break-word;
}

.task-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  letter-spacing: 0.15px;
  margin-bottom: 16px;
  word-break: break-word;
  overflow-wrap: break-word;
}

/* Highlighted/Active Card Style */
.task-card.active-card {
  border: 2px solid var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Card Footer */
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.priority-tag {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: capitalize;
}

.priority-tag.high {
  background-color: var(--priority-high-bg);
  color: var(--priority-high-text);
}

.priority-tag.medium {
  background-color: var(--priority-medium-bg);
  color: var(--priority-medium-text);
}

.priority-tag.low {
  background-color: var(--priority-low-bg);
  color: var(--priority-low-text);
}

.task-date {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.task-date i {
  font-size: 11px;
}

.card-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--transition-fast);
  margin-left: auto;
}

.task-card:hover .card-actions {
  opacity: 1;
}

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  font-size: 11px;
  transition: var(--transition-fast);
}

.action-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-main);
  border-color: var(--text-light);
}

.delete-btn:hover {
  color: var(--priority-high-text);
  background-color: var(--priority-high-bg);
  border-color: #fca5a5;
}

/* Add Task & New Task Buttons */
.add-task-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px;
  border-radius: var(--radius-md);
  border: 1.5px dashed var(--border-color);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 14px;
  background: transparent;
  transition: var(--transition-fast);
}

.add-task-btn:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.floating-new-task-btn {
  position: fixed;
  bottom: 24px;
  left: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 14px 24px;
  border-radius: 30px;
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
  transition: var(--transition-fast);
  z-index: 100;
}

.floating-new-task-btn:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

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

/* Responsive Rules */
@media (max-width: 1024px) {
  .kanban-board {
    grid-template-columns: repeat(2, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  .app-header {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .header-left {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .nav-menu {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .header-right {
    justify-content: space-between;
  }

  .search-wrapper {
    width: 100%;
    max-width: 300px;
  }

  .kanban-board {
    grid-template-columns: 1fr;
  }
}

/* ==========================================
   Task Input Modal Overlay Styling
   ========================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* Modal Card */
.modal-card {
  background-color: var(--bg-card);
  width: 100%;
  max-width: 480px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  padding: 24px;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

/* Modal Header */
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}

.modal-close-btn {
  color: var(--text-light);
  font-size: 20px;
  padding: 4px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

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

/* Form Styles */
.modal-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-input);
  color: var(--text-main);
  font-size: 14px;
  transition: var(--transition-fast);
}

.form-group textarea {
  resize: vertical;
  min-height: 45px;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--border-focus);
  background-color: var(--bg-card);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}


/* Modal Buttons */
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 10px;
}

.modal-btn {
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition-fast);
}

.cancel-btn {
  background-color: var(--bg-input);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
}

.cancel-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-main);
  border-color: var(--text-light);
}

.submit-btn {
  background-color: var(--color-primary);
  color: white;
}

.submit-btn:hover {
  background-color: var(--color-primary-hover);
}

/* In-place editing styles */
.task-card.editing {
  cursor: default;
}

.task-card.editing .card-drag-handle {
  cursor: default;
}

.task-card.editing .task-title,
.task-card.editing .task-desc {
  outline: none;
  background-color: var(--bg-input);
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  border: 1px dashed var(--color-primary);
  cursor: text;
  word-break: break-word;
  overflow-wrap: break-word;
  max-width: 100%;
}

.task-card.editing .priority-tag:hover {
  opacity: 0.8;
  transform: scale(1.05);
}

/* Dragging state styling */
.task-card.dragging {
  opacity: 0.5;
  border: 2px dashed var(--color-primary);
  transform: scale(0.98);
  transition: transform var(--transition-fast);
}

/* Filter Custom Dropdown Specific Styles */
.filter-dropdown {
  width: auto;
  display: inline-block;
}

.filter-dropdown .dropdown-trigger {
  border: none;
  background: transparent;
  padding: 0 4px;
  box-shadow: none;
  font-weight: 600;
  color: var(--text-main);
  width: auto;
  outline: none;
}

.filter-dropdown .dropdown-trigger:focus,
.filter-dropdown.active .dropdown-trigger {
  background: transparent !important;
  box-shadow: none !important;
  border-color: transparent !important;
  outline: none !important;
}

.filter-dropdown .dropdown-options {
  min-width: 140px;
  width: max-content;
  top: calc(100% + 10px);
}

.no-tasks-message {
  display: none;
  text-align: center;
  padding: 20px;
  color: var(--text-light);
  font-size: 14px;
  font-weight: 500;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-input);
  margin: 12px 0;
}

/* In-place edit counters */
.title-char-counter,
.desc-char-counter {
  font-size: 10px;
  font-weight: 700;
  color: var(--text-light);
  margin-top: 4px;
  margin-bottom: 8px;
  text-align: right;
  display: block;
}

/* Custom Dropdown Styling to completely bypass native select dropdown glitches */
.custom-dropdown {
  position: relative;
  width: 100%;
}

.dropdown-trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-input);
  color: var(--text-main);
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.dropdown-trigger:focus,
.custom-dropdown.active .dropdown-trigger {
  border-color: var(--border-focus);
  background-color: var(--bg-card);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.dropdown-options {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  margin-top: 6px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1100;
  overflow: hidden;
}

.custom-dropdown.active .dropdown-options {
  display: block;
}

.option-item {
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-main);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.option-item:hover {
  background-color: var(--bg-hover);
}

.option-item.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}

[data-theme="dark"] .option-item.active {
  color: #60a5fa; /* Higher contrast light blue text for dark theme primary-light backgrounds */
}