/* CSS Variables for Theming */
:root {
  /* Light Mode Defaults */
  --body-bg-start: #f5f7fa;
  --body-bg-end: #c3cfe2;
  --text-color: #333;
  --header-bg: #3498db;
  --header-text: white;
  --container-bg: white;
  --section-bg: #f8f9fa;
  --table-header-bg: #3498db;
  --table-header-text: white;
  --table-row-even-bg: #f9f9f9;
  --table-row-hover-bg: #f1f9ff;
  --time-column-color: #555;
  --input-bg: #f0f8ff;
  --input-border: #add8e6;
  --input-focus-shadow: rgba(52, 152, 219, 0.5);
  --modal-bg: white;
  --modal-h2-color: #3498db;
  --modal-input-border: #ddd;
  --error-color: #e74c3c;
  --info-bg: #e3f2fd;
  --info-h2-color: #1565c0;
  --logged-out-msg-bg: #fdf2f2;
  --logged-out-msg-border: #f9dede;
  --task-template-select-bg: #e6f2ff;
  --task-template-select-border: #b3d9ff;
  --task-template-select-color: #3498db;
  --my-task-item-border: #eee;
}

/* Dark Mode Overrides */
body.dark-mode {
  --body-bg-start: #212121;
  --body-bg-end: #323232;
  --text-color: #e0e0e0;
  --header-bg: #1a1a1a;
  --header-text: #f0f0f0;
  --container-bg: #3c3c3c;
  --section-bg: #4a4a4a;
  --table-header-bg: #1a1a1a;
  --table-header-text: #f0f0f0;
  --table-row-even-bg: #424242;
  --table-row-hover-bg: #525252;
  --time-column-color: #c0c0c0;
  --input-bg: #5a5a5a;
  --input-border: #6a6a6a;
  --input-focus-shadow: rgba(100, 181, 246, 0.5); /* Lighter blue for dark mode focus */
  --modal-bg: #3c3c3c;
  --modal-h2-color: #64b5f6; /* Lighter blue for dark mode modal title */
  --modal-input-border: #5a5a5a;
  --error-color: #ff8a80; /* Lighter red for dark mode error */
  --info-bg: #303f9f;
  --info-h2-color: #bbdefb;
  --logged-out-msg-bg: #424242;
  --logged-out-msg-border: #5a5a5a;
  --task-template-select-bg: #424242;
  --task-template-select-border: #64b5f6;
  --task-template-select-color: #bbdefb;
  --my-task-item-border: #5a5a5a;
}

/* Global Styles using variables */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: linear-gradient(135deg, var(--body-bg-start) 0%, var(--body-bg-end) 100%);
  color: var(--text-color);
  min-height: 100vh;
  padding: 20px;
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease; /* Smooth theme transition */
}

/* REMOVED: blur effect for body.modal-open .container */
/* Kept for scroll prevention ONLY: */
body.modal-open {
  overflow: hidden; /* Prevent scrolling of background content */
}

/* General UI Elements */
input, textarea, select, button {
  font-family: inherit; /* Ensure font is inherited for inputs */
  transition: all 0.2s ease-in-out;
  border-radius: 6px;
}

input:focus, textarea:focus, select:focus, button:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--input-focus-shadow);
}

button {
  cursor: pointer;
  padding: 10px 15px;
  border: none;
  font-weight: 500;
  color: var(--header-text); /* Buttons use header text color */
  background: var(--header-bg); /* Buttons use header background color */
}

button:hover:not(:disabled) {
  background: #2980b9; /* Specific hover for primary button */
  transform: translateY(-1px);
}
body.dark-mode button:hover:not(:disabled) { /* Dark mode hover override */
  background: #3a506b;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* Container & Header */
.container {
  max-width: 1400px;
  margin: 0 auto;
  background: var(--container-bg);
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  transition: background-color 0.3s ease; /* Smooth theme transition */
}

header {
  background: var(--header-bg);
  color: var(--header-text);
  padding: 25px 20px;
  text-align: center;
  border-bottom: 5px solid #2980b9;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  transition: background-color 0.3s ease, color 0.3s ease, border-bottom-color 0.3s ease; /* Smooth theme transition */
}
body.dark-mode header {
    border-bottom-color: #2c3e50; /* Darker border for dark mode header */
}


header h1 {
  font-size: 2.5rem;
  margin-bottom: 5px;
  flex-basis: 100%;
}

.subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  flex-basis: 100%;
}

#auth-section {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 10px 0;
  flex-grow: 1;
}

#login-btn { background: #4caf50; }
#login-btn:hover:not(:disabled) { background: #449d48; }
#logout-btn { background: #f44336; }
#logout-btn:hover:not(:disabled) { background: #d03d2f; }

#dark-mode-toggle { /* New Dark Mode Toggle Button */
  background: none;
  color: var(--header-text);
  border: 1px solid var(--header-text);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}
#dark-mode-toggle:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}
body.dark-mode #dark-mode-toggle {
    border-color: #f0f0f0;
    background: rgba(0,0,0,0.2);
}
body.dark-mode #dark-mode-toggle:hover:not(:disabled) {
    background: rgba(0,0,0,0.4);
}


#user-status {
  margin: 0 10px;
  font-weight: 500;
  display: flex;
  align-items: center;
}

#reset-day {
  background: #e74c3c;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.95rem;
}
#reset-day:hover:not(:disabled) {
  background: #c0392b;
}

#quick-add-task-btn, #manage-tasks-btn {
    background: #9b59b6;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.95rem;
}
#quick-add-task-btn:hover:not(:disabled), #manage-tasks-btn:hover:not(:disabled) {
    background: #8e44ad;
}

/* Main Content Layout */
.main-content {
  display: flex;
  flex-direction: column;
  padding: 25px;
  gap: 25px;
}

@media (min-width: 900px) {
  .main-content {
    flex-direction: row;
  }
  header {
    justify-content: space-between;
  }
  header h1, header .subtitle {
    flex-basis: auto;
  }
}

/* Date Selector */
.date-selector {
  background: var(--section-bg);
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: background-color 0.3s ease;
}

.date-selector h2 {
  margin-bottom: 15px;
  color: #2c3e50;
  font-size: 1.6rem;
}
body.dark-mode .date-selector h2 { color: var(--text-color); }


.date-picker {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
  width: 100%;
  max-width: 250px;
  background-color: var(--input-bg);
  color: var(--text-color);
}

.date-display {
  font-size: 1.3rem;
  margin: 15px 0;
  font-weight: 600;
  color: #3498db;
}
body.dark-mode .date-display { color: #64b5f6; } /* Lighter blue for dark mode */


/* Planner Table */
.planner-container {
  flex: 1;
  overflow-x: auto;
}

.planner-table {
  width: 100%;
  border-collapse: collapse;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  min-width: 900px;
}

.planner-table th {
  background: var(--table-header-bg);
  color: var(--table-header-text);
  padding: 18px 12px;
  text-align: center;
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 10;
  font-size: 1.05rem;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.planner-table td {
  padding: 15px 12px;
  border-bottom: 1px solid #eaeaea;
  vertical-align: top;
}
body.dark-mode .planner-table td { border-bottom-color: #5a5a5a; }

.planner-table tr:nth-child(even) {
  background-color: var(--table-row-even-bg);
}

.planner-table tr:hover {
  background-color: var(--table-row-hover-bg);
}

/* Column Widths */
.time-column {
  width: 8%;
  min-width: 80px;
  text-align: center;
  font-weight: 600;
  color: var(--time-column-color);
}
.task-column {
  width: 28%;
  min-width: 280px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.done-column { width: 25%; min-width: 220px; }
.priority-column { width: 12%; min-width: 100px; text-align: center; }
.status-column { width: 12%; min-width: 100px; text-align: center; }

/* Textarea & Inputs */
input, textarea, select {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: inherit;
  background-color: var(--input-bg);
  color: var(--text-color);
}
body.dark-mode input, body.dark-mode select { border-color: var(--input-border); }

textarea {
  min-height: 80px;
  resize: vertical;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  padding: 12px;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

textarea:focus {
  box-shadow: 0 0 5px var(--input-focus-shadow), inset 0 1px 3px rgba(0,0,0,0.1);
}

/* Priority Selector Styles */
.priority-select {
  margin-top: 5px;
  padding: 6px 8px;
  border: 1px solid var(--modal-input-border);
  border-radius: 4px;
  font-size: 0.9rem;
  background-color: var(--container-bg); /* Use container bg for selects */
  color: var(--text-color);
}

/* Visual indicators for priority on task textarea */
.task-textarea.priority-low { border-left: 5px solid #2ecc71; padding-left: 7px; }
.task-textarea.priority-medium { border-left: 5px solid #f39c12; padding-left: 7px; }
.task-textarea.priority-high { border-left: 5px solid #e74c3c; padding-left: 7px; }

/* Task Template Select */
.task-template-select {
  padding: 8px;
  border: 1px solid var(--task-template-select-border);
  background-color: var(--task-template-select-bg);
  color: var(--task-template-select-color);
  font-weight: 500;
  border-radius: 5px;
  cursor: pointer;
}
.task-template-select option {
  color: var(--text-color);
  background-color: var(--input-bg);
}

/* Status Buttons */
.status-buttons {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 5px;
}

.status-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.3rem;
  border: 2px solid transparent;
  transition: all 0.2s;
}

.status-btn:hover:not(.active):not(:disabled) {
  transform: scale(1.05);
  box-shadow: 0 0 5px rgba(0,0,0,0.2);
}
body.dark-mode .status-btn:hover:not(.active):not(:disabled) {
  box-shadow: 0 0 5px rgba(255,255,255,0.2);
}

.completed-btn { background: #e8f5e9; color: #4caf50; }
.completed-btn.active { background: #4caf50; color: white; border-color: #2e7d32; }
.completed-btn.active:hover:not(:disabled) { background: #2e7d32; }

.lost-btn { background: #ffebee; color: #f44336; }
.lost-btn.active { background: #f44336; color: white; border-color: #c62828; }
.lost-btn.active:hover:not(:disabled) { background: #c62828; }

/* Progress Section */
.progress-section {
  background: var(--section-bg);
  padding: 25px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: background-color 0.3s ease;
}

.progress-section h2 {
  margin-bottom: 20px;
  color: #2c3e50;
  font-size: 1.6rem;
}
body.dark-mode .progress-section h2 { color: var(--text-color); }

#period-selector {
  padding: 8px 12px;
  font-size: 1rem;
  border-radius: 6px;
  border: 1px solid #ddd;
  margin-bottom: 15px;
  background-color: var(--container-bg);
  color: var(--text-color);
}

.chart-container {
  position: relative;
  width: 250px;
  height: 250px;
  margin: 0 auto 20px;
}

#progress-text {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-color);
}

.day-status {
  padding: 15px;
  border-radius: 10px;
  font-weight: bold;
  font-size: 1.2rem;
  margin-top: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

.status-done {
  background: #e8f5e9;
  color: #2e7d32;
  border: 2px solid #4caf50;
}

.status-lost {
  background: #ffebee;
  color: #c62828;
  border: 2px solid #f44336;
}

/* Instructions */
.instructions {
  margin-top: 30px;
  padding: 25px;
  background: var(--info-bg);
  border-radius: 10px;
  font-size: 0.95rem;
  line-height: 1.6;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: background-color 0.3s ease;
}

.instructions h2 {
  margin-bottom: 15px;
  color: var(--info-h2-color);
  font-size: 1.4rem;
}
body.dark-mode .instructions h2 { color: var(--text-color); }


.instructions ul {
  padding-left: 25px;
}

.instructions li {
  margin-bottom: 8px;
}

/* Modals (Auth & Quick Add & My Tasks) */
#modalBackdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 999;
  transition: background-color 0.3s ease;
}

#authModal, #quickAddTaskModal, #myTasksModal {
  display: none; /* Ensure modals are hidden by default */
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--modal-bg);
  padding: 25px;
  border-radius: 12px;
  box-shadow: 0 15px 35px rgba(0,0,0,0.2), 0 5px 15px rgba(0,0,0,0.1);
  z-index: 1000;
  text-align: center;
  width: 90%;
  max-width: 450px;
  max-height: 90vh;
  overflow-y: auto;
  transition: background-color 0.3s ease;
}

#authModal h2, #quickAddTaskModal h2, #myTasksModal h2 {
  color: var(--modal-h2-color);
  margin-bottom: 20px;
  font-size: 1.8rem;
}

#authModal form, #quickAddTaskModal form, #myTasksModal div:has(input) {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
#myTasksModal #newTaskTemplateInput {
    margin-top: 10px;
}
#myTasksModal button {
    margin-top: 5px;
}


#authModal input, #quickAddTaskModal input, #quickAddTaskModal select, #myTasksModal input {
  margin: 0;
  padding: 12px;
  border: 1px solid var(--modal-input-border);
  border-radius: 8px;
  font-size: 1rem;
  background-color: var(--input-bg);
  color: var(--text-color);
}

#authModal button, #quickAddTaskModal button, #myTasksModal button {
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 1rem;
  margin-top: 5px;
}

/* Special Close buttons */
#authModal .close-button,
#quickAddTaskModal .close-button,
#myTasksModal .close-button {
  background: #95a5a6;
  margin-top: 15px;
}
#authModal .close-button:hover,
#quickAddTaskModal .close-button:hover,
#myTasksModal .close-button:hover {
  background: #7f8c8d;
}

#authError { color: var(--error-color); margin-top: 10px; font-weight: 500; }
#authLoading { color: #3498db; font-style: italic; margin-top: 10px; }
#not-logged-in-message {
  display: none;
  color: var(--error-color);
  text-align: center;
  margin: 20px;
  padding: 15px;
  background: var(--logged-out-msg-bg);
  border: 1px solid var(--logged-out-msg-border);
  border-radius: 8px;
  font-weight: 500;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
body.dark-mode #not-logged-in-message {
    color: #ff8a80;
}


/* My Tasks List specific styles */
#myTasksList {
    text-align: left;
    margin-top: 15px;
    padding: 0 10px;
    max-height: 250px;
    overflow-y: auto;
    border: 1px solid var(--my-task-item-border);
    border-radius: 8px;
    background-color: var(--section-bg);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}
.my-task-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px dashed var(--my-task-item-border);
    font-size: 0.95rem;
}
.my-task-item:last-child {
    border-bottom: none;
}
.my-task-item span {
    flex-grow: 1;
    margin-right: 10px;
    color: var(--text-color);
}
.my-task-item .delete-task-btn {
    background: none;
    border: none;
    color: var(--error-color);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 5px;
    margin: 0;
    line-height: 1;
    transition: color 0.2s;
}
.my-task-item .delete-task-btn:hover {
    color: #c0392b;
    transform: scale(1.1);
}
body.dark-mode .my-task-item .delete-task-btn:hover {
    color: #ff8a80;
}
.my-task-item .delete-task-btn:focus {
    box-shadow: none;
}


/* Mobile-specific adjustments for Modals */
@media (max-width: 600px) {
  #authModal, #quickAddTaskModal, #myTasksModal {
    top: 50%;
    width: 95%;
    padding: 20px;
    font-size: 1rem;
  }
  #authModal input, #quickAddTaskModal input, #quickAddTaskModal select, #myTasksModal input { font-size: 1rem; padding: 10px; }
  #authModal button, #quickAddTaskModal button, #myTasksModal button { font-size: 1rem; padding: 12px; }
  body.modal-open { overflow: hidden; }
}

/* Custom scrollbar */
.planner-container::-webkit-scrollbar { height: 12px; }
.planner-container::-webkit-scrollbar-track { background: #f1f1f1; border-radius: 10px; }
.planner-container::-webkit-scrollbar-thumb { background: #3498db; border-radius: 10px; }
.planner-container::-webkit-scrollbar-thumb:hover { background: #2980b9; }
body.dark-mode .planner-container::-webkit-scrollbar-track { background: #555; }
body.dark-mode .planner-container::-webkit-scrollbar-thumb { background: #64b5f6; }
body.dark-mode .planner-container::-webkit-scrollbar-thumb:hover { background: #42a5f5; }