/* CSS Variables */
:root {
  /* Colors */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #a5b4fc;
  --secondary: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --dark: #1e293b;
  --light: #f8fafc;

  /* Grays */
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* Task Colors */
  --task-main-color: #0b1bff;
  --task-sub-color: #fbff0b;
  --task-minor-color: #01ff4d;
  --task-text-color: #f0f8ff;
  --subtask-text-color: #000000;
  --section-title-color: #ffffcc;
  --empty-text-color: #f9f0ff;
  --header-color: rgb(6, 252, 252);
  --header-line-color: rgb(6, 228, 217);

  /* Background Opacities */
  --bg-opacity-low: rgba(255, 255, 255, 0.1);
  --bg-opacity-medium: rgba(255, 255, 255, 0.15);
  --bg-opacity-high: rgba(255, 255, 255, 0.2);
  --bg-opacity-higher: rgba(255, 255, 255, 0.3);

  /* Borders */
  --border-light: rgba(255, 255, 255, 0.2);
  --border-medium: rgba(255, 255, 255, 0.3);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

  /* Border Radius */
  --radius-sm: 0.125rem;
  --radius: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;

  /* Transitions */
  --transition: 0.25s ease;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: linear-gradient(135deg, #4158d0, #c850c0, #ffcc70);
  background-attachment: fixed;
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
  padding: var(--space-xl) 0;
  position: relative;
  overflow-x: hidden;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  position: relative;
}

/* Glass Morphism Effect */
.container::before {
  content: "";
  position: absolute;
  top: -20px;
  left: 0;
  right: 0;
  bottom: -20px;
  background: var(--bg-opacity-low);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-light);
  z-index: -1;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  margin: 0 10px;
}

/* Headings */
h1,
h2 {
  position: relative;
  font-weight: 600;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  margin-bottom: var(--space-xl);
  color: var(--header-color);
  font-weight: 700;
  font-size: 2.5rem;
  letter-spacing: -0.025em;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}

h1::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 4px;
  background: var(--header-line-color);
  border-radius: 2px;
  box-shadow: 0 2px 10px rgba(255, 255, 255, 0.5);
}

/* Common container styles */
.time-sections,
.task-input-container,
.tasks-container {
  background: var(--bg-opacity-high);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  position: relative;
}

/* Time Section Tabs */
.time-sections {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
  gap: var(--space-sm);
  padding: 0.75rem;
}

/* Common button styles */
.section-btn,
#addTaskBtn,
.task-add-subtask,
.task-toggle-subtasks,
.task-delete,
.subtask-delete,
.add-subtask-btn {
  cursor: pointer;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), background-color var(--transition), box-shadow var(--transition);
}

.section-btn {
  padding: 0.75rem 1.25rem;
  background-color: var(--bg-opacity-low);
  border-radius: var(--radius-lg);
  font-weight: 500;
  color: #050000;
  position: relative;
  z-index: 1;
  font-size: 0.95rem;
}

.section-btn:hover {
  background-color: var(--bg-opacity-high);
  transform: translateY(-2px);
}

.section-btn.active {
  background-color: var(--bg-opacity-higher);
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.section-btn.active::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgb(0, 0, 0);
  border-radius: 3px 3px 0 0;
}

/* Task Input Container */
.task-input-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  overflow: hidden;
}

.task-input-container::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.2) 100%);
}

/* Input styles */
#taskInput,
.add-subtask-input {
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  background: rgba(255, 255, 255, 0.9);
  transition: border-color var(--transition), box-shadow var(--transition);
}

#taskInput {
  flex: 1;
  padding: var(--space-md) 1.25rem;
  min-width: 200px;
  box-shadow: var(--shadow-sm);
}

#taskInput:focus,
.add-subtask-input:focus {
  outline: none;
  border-color: white;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

#taskInput::placeholder,
.add-subtask-input::placeholder {
  color: var(--gray-400);
}

/* Priority Selector */
.priority-selector {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  background: var(--bg-opacity-medium);
  padding: var(--space-sm);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
}

.priority-label {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  color: white;
  transition: background-color var(--transition), box-shadow var(--transition), color var(--transition);
}

/* Priority label colors */
.priority-label.main {
  background-color: rgba(79, 68, 239, 0.2);
  border: 1px solid rgba(79, 68, 239, 0.3);
}

.priority-label.sub {
  background-color: rgba(245, 158, 11, 0.2);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.priority-label.minor {
  background-color: rgba(16, 185, 129, 0.2);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

input[type="radio"] {
  display: none;
}

input[type="radio"]:checked + .priority-label {
  color: rgb(0, 0, 0);
}

input[type="radio"]:checked + .priority-label.main {
  background-color: var(--primary);
  box-shadow: 0 0 15px rgba(68, 205, 239, 0.5);
  border: 1px solid var(--primary);
}

input[type="radio"]:checked + .priority-label.sub {
  background-color: var(--warning);
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.5);
  border: 1px solid var(--warning);
}

input[type="radio"]:checked + .priority-label.minor {
  background-color: var(--secondary);
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.5);
  border: 1px solid var(--secondary);
}

/* Add Task Button */
#addTaskBtn {
  padding: var(--space-md) 1.5rem;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0.1) 100%);
  color: rgb(252, 0, 0);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  gap: var(--space-sm);
}

#addTaskBtn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.2) 100%);
}

#addTaskBtn:active {
  transform: translateY(0);
}

#addTaskBtn::before {
  content: "+";
  font-size: 1.25rem;
  font-weight: 400;
}

/* Tasks Container */
.tasks-container {
  padding: var(--space-xl);
  min-height: 400px;
}

#currentSection {
  margin-bottom: var(--space-lg);
  color: var(--section-title-color);
  font-size: 1.5rem;
  border-bottom: 2px solid var(--border-light);
  padding-bottom: var(--space-md);
}

#currentSection::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 50px;
  height: 2px;
  background: white;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

/* Task Items */
.task-item {
  display: flex;
  align-items: center;
  padding: var(--space-md);
  border-bottom: 1px solid var(--border-light);
  gap: var(--space-md);
  border-radius: var(--radius);
  margin-bottom: var(--space-sm);
  background: var(--bg-opacity-low);
  transition: background-color var(--transition), transform var(--transition);
}

.task-item:hover {
  background-color: var(--bg-opacity-high);
  transform: translateX(5px);
}

.task-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

/* Custom Checkbox */
.task-checkbox,
.subtask-checkbox {
  appearance: none;
  -webkit-appearance: none;
  border: 2px solid rgba(15, 0, 97, 0.5);
  border-radius: 50%;
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  background: var(--bg-opacity-low);
  transition: border-color var(--transition), background-color var(--transition);
}

.task-checkbox {
  width: 22px;
  height: 22px;
}

.subtask-checkbox {
  width: 18px;
  height: 18px;
}

.task-checkbox:checked,
.subtask-checkbox:checked {
  border-color: rgb(90, 0, 0);
  background-color: var(--bg-opacity-higher);
}

.task-checkbox:checked::after,
.subtask-checkbox:checked::after {
  content: "✓";
  position: absolute;
  color: rgb(90, 0, 0);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.task-checkbox:checked::after {
  font-size: 14px;
}

.subtask-checkbox:checked::after {
  font-size: 12px;
}

/* Task Text */
.task-text,
.subtask-text {
  flex: 1;
  word-break: break-word;
  font-weight: 600;
  padding: 0.25rem 0;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  letter-spacing: 0.01em;
  position: relative;
  z-index: 1;
  transition: color var(--transition), text-decoration var(--transition), opacity var(--transition);
}

.task-text {
  font-size: 1.1rem;
  color: var(--task-text-color);
}

.subtask-text {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--subtask-text-color);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Completed tasks */
.task-item.completed .task-text,
.subtask-item.completed .subtask-text {
  text-decoration: line-through;
  opacity: 0.7;
}

.task-item.completed .task-text {
  font-weight: 500;
  color: rgba(0, 2, 90, 0.8);
}

/* Priority-specific text styling */
.task-priority-main .task-text {
  color: var(--task-main-color);
  text-shadow: 0 0 8px rgba(239, 68, 68, 0.5);
}

.task-priority-sub .task-text {
  color: var(--task-sub-color);
  text-shadow: 0 0 8px rgba(245, 158, 11, 0.5);
}

.task-priority-minor .task-text {
  color: var(--task-minor-color);
  text-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

/* Task action buttons */
.task-delete,
.subtask-delete {
  background: none;
  color: rgba(255, 255, 255, 0.7);
  border-radius: 50%;
  opacity: 0.5;
  transition: opacity var(--transition), background-color var(--transition), color var(--transition);
}

.task-delete {
  font-size: 1rem;
  width: 30px;
  height: 30px;
}

.subtask-delete {
  font-size: 0.8rem;
  width: 24px;
  height: 24px;
}

.task-item:hover .task-delete,
.subtask-item:hover .subtask-delete {
  opacity: 1;
}

.task-delete:hover,
.subtask-delete:hover {
  background-color: rgba(239, 68, 68, 0.2);
  color: white;
}

/* Priority Indicators */
.task-priority-main {
  border-left: 4px solid var(--primary-dark);
  box-shadow: 0 0 15px rgba(94, 68, 239, 0.3);
}

.task-priority-sub {
  border-left: 4px solid var(--warning);
  box-shadow: 0 0 15px rgba(245, 158, 11, 0.3);
}

.task-priority-minor {
  border-left: 4px solid var(--secondary);
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.3);
}

/* Empty State */
#tasksList:empty::after {
  content: "No tasks yet. Add a task to get started!";
  display: block;
  text-align: center;
  color: var(--empty-text-color);
  font-weight: 500;
  padding: var(--space-xl) 0;
  font-style: italic;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Subtask styles */
.task-main {
  display: flex;
  align-items: center;
  width: 100%;
}

.task-actions {
  display: flex;
  gap: var(--space-sm);
  margin-left: auto;
}

/* Subtask buttons */
.task-add-subtask,
.task-toggle-subtasks {
  border: 1px solid var(--border-light);
  color: var(--task-text-color);
  font-size: 1rem;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  opacity: 0.8;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.task-item:hover .task-add-subtask,
.task-item:hover .task-toggle-subtasks {
  opacity: 1;
}

.task-add-subtask:hover,
.task-toggle-subtasks:hover {
  background: var(--bg-opacity-high);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  color: white;
}

.task-add-subtask:active,
.task-toggle-subtasks:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Style for the add button */
.task-add-subtask {
  background: rgba(203, 0, 230, 0.3);
  border: 1px solid rgba(16, 185, 129, 0.3);
  font-weight: bold;
}

.task-add-subtask:hover {
  background: rgba(0, 222, 252, 0.4);
}

/* Style for the toggle button */
.task-toggle-subtasks {
  background: rgba(99, 102, 241, 0.3);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.task-toggle-subtasks:hover {
  background: rgba(99, 102, 241, 0.4);
}

/* Subtasks container */
.subtasks-container {
  margin-left: 2.5rem;
  margin-top: var(--space-sm);
  border-left: 2px dashed var(--border-light);
  padding-left: var(--space-md);
}

.subtasks-list {
  margin-bottom: var(--space-sm);
}

/* Subtask items */
.subtask-item {
  display: flex;
  align-items: center;
  padding: var(--space-sm);
  gap: var(--space-sm);
  border-radius: var(--radius-sm);
  margin-bottom: 0.25rem;
  background: rgba(255, 255, 255, 0.05);
  transition: background-color var(--transition);
}

.subtask-item:hover {
  background-color: var(--bg-opacity-low);
}

/* Add subtask container */
.add-subtask-container {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

/* Subtask input field */
.add-subtask-input {
  flex: 1;
  padding: var(--space-sm) 0.75rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  background: var(--bg-opacity-low);
  color: white;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.add-subtask-input:focus {
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2), inset 0 2px 4px rgba(0, 0, 0, 0.05);
  background: var(--bg-opacity-medium);
}

/* Add subtask button */
.add-subtask-btn {
  padding: var(--space-sm) 0.75rem;
  background: rgba(104, 0, 173, 0.3);
  color: rgb(114, 10, 184);
  border: 1px solid rgba(130, 0, 170, 0.466);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.add-subtask-btn:hover {
  background: rgba(248, 99, 0, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.add-subtask-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(219, 0, 0, 0.1);
}

/* Subtask progress indicator */
.subtask-progress {
  font-size: 0.8rem;
  background: var(--bg-opacity-medium);
  padding: 0.2rem var(--space-sm);
  border-radius: 1rem;
  margin-left: var(--space-sm);
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--border-light);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

/* Offline indicator */
.offline-indicator {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(239, 68, 68, 0.9);
  color: white;
  padding: 10px 20px;
  border-radius: 8px;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  text-align: center;
  animation: fadeIn 0.3s ease;
  max-width: 90%;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translate(-50%, 20px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

/* Debug panel (hidden by default) */
.debug-info {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.8);
  color: #00ff00;
  padding: 10px;
  font-family: monospace;
  z-index: 9999;
  max-height: 50vh;
  overflow-y: auto;
}

.debug-info button {
  background: #333;
  color: white;
  border: 1px solid #555;
  padding: 5px 10px;
  margin-right: 5px;
  border-radius: 4px;
  cursor: pointer;
}

.debug-info button:hover {
  background: #444;
}

.debug-info pre {
  margin-top: 10px;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Responsive Design */
@media (max-width: 768px) {
  body {
    padding: var(--space-md) 0;
  }
  h1 {
    font-size: 2rem;
  }
  .time-sections {
    padding: var(--space-sm);
  }
  .section-btn {
    padding: 0.6rem var(--space-md);
    font-size: 0.85rem;
  }
  .task-input-container {
    padding: 1.25rem;
    flex-direction: column;
  }
  #taskInput,
  #addTaskBtn,
  .priority-selector {
    width: 100%;
  }
  .priority-selector {
    justify-content: space-between;
  }
  .tasks-container {
    padding: var(--space-lg);
  }
  .subtasks-container {
    margin-left: var(--space-lg);
  }
  .task-actions {
    gap: 0.25rem;
  }
  .add-subtask-container {
    flex-direction: column;
  }
  .add-subtask-btn {
    width: 100%;
  }
  .offline-indicator {
    width: 90%;
    padding: 8px 15px;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }
  h1 {
    font-size: 1.75rem;
  }
  .time-sections {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    padding: var(--space-sm);
    margin-bottom: var(--space-lg);
  }
  .section-btn {
    padding: var(--space-sm) 0.75rem;
    font-size: 0.8rem;
    white-space: nowrap;
  }
  .task-input-container {
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
  }
  #taskInput {
    padding: 0.75rem var(--space-md);
  }
  .priority-selector {
    padding: 0.25rem;
    gap: 0.25rem;
  }
  .priority-label {
    padding: 0.4rem 0.75rem;
    font-size: 0.75rem;
  }

  #addTaskBtn {
    padding: 0.75rem var(--space-md);
  }
  .tasks-container {
    padding: var(--space-md);
  }
  .task-item {
    padding: 0.75rem;
  }
  .subtasks-container {
    margin-left: var(--space-md);
    padding-left: var(--space-sm);
  }
  .subtask-item {
    padding: 0.4rem;
  }
  .subtask-text {
    font-size: 0.85rem;
  }
}