:root {
  --bg-color: #0c1524;
  --card-bg: #111a2c;
  --text-color: #e0e9f6;
  --primary-color: #64c2ff;
  --secondary-color: #1a233b;
  --border-color: #2b3952;
  --high-priority: #ff6b6b;
  --medium-priority: #ffd166;
  --low-priority: #4ecdc4;
  --success-color: #38c172;
  --delete-color: #ff3b3b;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

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

body {
  font-family: "Poppins", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navigation Bar */
.navbar {
  background-color: var(--card-bg);
  padding: 1.5rem 2rem;
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.logo {
  font-weight: 700;
  font-size: 1.8rem;
  color: var(--primary-color);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease, background-color 0.3s ease;
  padding: 0.75rem 1.2rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--card-bg);
  background-color: var(--primary-color);
}

.nav-links a i {
  margin-right: 8px;
}

/* Main Content Containers */
.task-container,
.notes-container,
.analytics-container {
  max-width: 1200px;
  margin: 2.5rem auto;
  padding: 0 2rem;
  width: 100%;
  flex-grow: 1;
}

.tasks-section,
.notes-section,
.notes-display,
.analytics-section,
.analytics-details {
  background-color: var(--card-bg);
  padding: 2.5rem;
  border-radius: 18px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

/* Headings */
h2 {
  font-size: 1.8rem;
  color: var(--primary-color);
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.8rem;
  display: flex;
  align-items: center;
}

h2 i {
  margin-left: 12px;
  color: var(--text-color);
}

/* Task List */
.task-list {
  list-style: none;
  padding: 0;
  flex-grow: 1;
  overflow-y: auto;
  max-height: 400px;
}

.task-divider {
  border: 0;
  height: 1px;
  background-color: var(--border-color);
  margin: 2rem 0;
}

.task-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 1.5rem;
  background-color: var(--secondary-color);
  border-radius: 12px;
  margin-bottom: 1rem;
  border-left: 5px solid transparent;
  transition: transform 0.3s ease, border-left 0.3s ease;
}

.task-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.task-item.completed {
  border-left-color: var(--success-color);
  background-color: #151e33;
  opacity: 0.8;
}

.task-item.high-priority {
  border-left-color: var(--high-priority);
}
.task-item.medium-priority {
  border-left-color: var(--medium-priority);
}
.task-item.low-priority {
  border-left-color: var(--low-priority);
}

.task-content {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

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

.task-description-text {
  font-size: 0.9rem;
  color: #8b949e;
  margin-top: 4px;
}

.task-item.completed .task-text {
  text-decoration: line-through;
  color: #8b949e;
}

.task-date {
  font-size: 0.9rem;
  color: #8b949e;
  margin-top: 6px;
}

.task-actions {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  margin-left: 1.5rem;
}

.task-actions button {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  color: #8b949e;
  transition: color 0.3s ease, transform 0.2s ease;
}

.task-actions button:hover {
  transform: scale(1.15);
  color: var(--primary-color);
}

.task-actions .complete-btn.completed {
  color: var(--success-color);
}

.task-actions .delete-btn:hover {
  color: var(--delete-color);
}

/* Forms */
.add-task-form,
.add-note-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: auto;
}

.task-input,
.task-description,
.priority-select {
  width: 100%;
}

.task-description,
#note-text {
  resize: vertical;
  min-height: 80px;
}

.task-input,
.task-description,
#note-text,
select {
  padding: 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  font-size: 1rem;
  background-color: var(--secondary-color);
  color: var(--text-color);
  transition: border-color 0.3s;
}

.task-input:focus,
.task-description:focus,
#note-text:focus,
select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.task-input::placeholder,
.task-description::placeholder,
#note-text::placeholder,
select::placeholder {
  color: #555;
}

.add-btn,
.add-note-btn {
  padding: 0.9rem 1.5rem;
  background-color: var(--primary-color);
  color: var(--card-bg);
  border: none;
  border-radius: 10px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s;
  white-space: nowrap;
}

.add-btn:hover,
.add-note-btn:hover {
  background-color: #4493f8;
}

.priority-select {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-color);
}

.priority-select select {
  padding: 0.6rem;
  border-radius: 8px;
  background-color: var(--secondary-color);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  cursor: pointer;
}

/* Notes Page Specific Styles */
.notes-container {
  display: flex;
  flex-direction: column;
}

.notes-display {
  margin-top: 2rem;
}

.notes-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.note-item {
  background-color: var(--secondary-color);
  padding: 1.8rem;
  border-radius: 15px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.note-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.8rem;
  margin-bottom: 1.2rem;
}

.note-date {
  font-size: 0.9rem;
  color: #8b949e;
}

.note-actions button {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  color: #8b949e;
  transition: color 0.3s ease, transform 0.2s ease;
  margin-left: 10px;
}

.note-actions button:hover {
  transform: scale(1.15);
  color: var(--primary-color);
}

.note-actions .delete-btn:hover {
  color: var(--delete-color);
}

.note-content {
  white-space: pre-wrap;
  font-size: 1.1rem;
}

/* Analytics Page Styles */
.analytics-container {
  display: flex;
  flex-direction: column;
}

.analytics-section {
  margin-bottom: 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  text-align: center;
}

.stat-card {
  background-color: var(--secondary-color);
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.stat-card h3 {
  font-size: 1.2rem;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.stat-card p {
  font-size: 2.5rem;
  font-weight: 700;
}

.priority-breakdown {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.priority-bar-container {
  background-color: var(--secondary-color);
  padding: 1rem;
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.priority-label {
  font-weight: 600;
  color: var(--text-color);
}

.priority-count {
  font-weight: 600;
}

.priority-high {
  color: var(--high-priority);
}
.priority-medium {
  color: var(--medium-priority);
}
.priority-low {
  color: var(--low-priority);
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal.show {
  display: flex;
  opacity: 1;
}

.modal-content {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 15px;
  text-align: center;
  box-shadow: var(--shadow);
  transform: translateY(-50px);
  transition: transform 0.3s ease-out;
  width: 90%;
  max-width: 500px;
}

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

.modal-content p {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
}

.modal-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background-color 0.3s;
}

.btn-danger {
  background-color: var(--delete-color);
  color: white;
}

.btn-danger:hover {
  background-color: #d13a3a;
}

.btn-secondary {
  background-color: #6c757d;
  color: white;
}

.btn-secondary:hover {
  background-color: #5a6268;
}

.btn-primary {
  background-color: var(--primary-color);
  color: var(--card-bg);
}

.btn-primary:hover {
  background-color: #4493f8;
}

.modal-input,
.modal-textarea {
  width: 100%;
  padding: 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--secondary-color);
  color: var(--text-color);
  margin-bottom: 1rem;
  font-size: 1rem;
  resize: vertical;
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .navbar {
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }

  .nav-links {
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .task-container,
  .notes-container,
  .analytics-container {
    padding: 0 1rem;
  }

  .tasks-section,
  .notes-section,
  .notes-display,
  .analytics-section,
  .analytics-details {
    padding: 1.5rem;
  }

  .add-task-form,
  .add-note-form {
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
  }

  .add-btn,
  .add-note-btn {
    width: 100%;
  }

  .priority-select {
    justify-content: space-between;
  }
}

@media (max-width: 500px) {
  .logo {
    font-size: 1.5rem;
  }
  .nav-links a {
    font-size: 0.9rem;
  }
  h2 {
    font-size: 1.5rem;
  }
  .task-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .task-actions {
    margin-left: 0;
  }
}