:root {
  --primary-color: #6200ea;
  --primary-light: #9d46ff;
  --primary-dark: #0a00b6;
  --accent-color: #03dac6;
  --background-dark: #121212;
  --surface-dark: #1e1e1e;
  --error-color: #cf6679;
  --text-primary: rgba(255, 255, 255, 0.87);
  --text-secondary: rgba(255, 255, 255, 0.6);
  --border-color: rgba(255, 255, 255, 0.12);
  --shadow-color: rgba(0, 0, 0, 0.5);
  --success-color: #4caf50;
  --warning-color: #ff9800;
  --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--background-dark);
  color: var(--text-primary);
  line-height: 1.6;
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--accent-color);
}

/* Bottoni */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background-color: var(--primary-light);
  box-shadow: 0 2px 10px var(--shadow-color);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--primary-light);
  color: var(--primary-light);
}

.btn-icon {
  padding: 0.5rem;
  border-radius: 50%;
  background-color: transparent;
  color: var(--text-primary);
}

.btn-icon:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Form */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary-light);
  outline: none;
}

.form-error {
  color: var(--error-color);
  font-size: 0.875rem;
  margin-top: 0.5rem;
  min-height: 1.25rem;
}

/* Autenticazione */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 1rem;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--background-dark) 100%);
}

.auth-card {
  background-color: var(--surface-dark);
  border-radius: 8px;
  padding: 2rem;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 4px 20px var(--shadow-color);
  animation: fadeIn 0.5s ease-out;
}

.auth-card .logo {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-card .logo h1 {
  color: var(--primary-light);
  font-size: 2rem;
  letter-spacing: 1px;
}

.auth-card h2 {
  margin-bottom: 1.5rem;
  text-align: center;
}

.auth-card form {
  margin-bottom: 1rem;
}

.auth-card .btn {
  width: 100%;
}

.auth-switch {
  text-align: center;
  margin-top: 1rem;
  color: var(--text-secondary);
}

/* Dashboard */
.dashboard-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-header {
  background-color: var(--surface-dark);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  z-index: 10;
}

.main-header .logo h1 {
  color: var(--primary-light);
  font-size: 1.5rem;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.dashboard-content {
  display: flex;
  flex: 1;
}

.sidebar {
  width: 250px;
  background-color: var(--surface-dark);
  padding: 2rem 0;
  border-right: 1px solid var(--border-color);
}

.sidebar nav ul {
  list-style: none;
}

.sidebar nav ul li a {
  display: flex;
  align-items: center;
  padding: 0.75rem 2rem;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  gap: 0.75rem;
}

.sidebar nav ul li a:hover,
.sidebar nav ul li a.active {
  background-color: rgba(98, 0, 234, 0.1);
  color: var(--primary-light);
  border-left: 3px solid var(--primary-light);
}

.main-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.main-content.full-width {
  width: 100%;
}

.view {
  display: none;
}

.view.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

/* Calendario */
.calendar-container {
  background-color: var(--surface-dark);
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 1.5rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
}

.calendar-day-header {
  text-align: center;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem;
}

.calendar-day {
  aspect-ratio: 1;
  border-radius: 4px;
  padding: 0.5rem;
  background-color: rgba(255, 255, 255, 0.05);
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}

.calendar-day:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.calendar-day.today {
  border: 2px solid var(--primary-light);
}

.calendar-day.has-tasks::after {
  content: '';
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background-color: var(--primary-light);
}

.calendar-day-number {
  font-weight: 500;
}

.calendar-day-tasks {
  margin-top: 0.25rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
  overflow: hidden;
}

/* Task */
.task-actions {
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: flex-end;
}

.tasks-list {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.task-card {
  background-color: var(--surface-dark);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border-left: 4px solid var(--primary-color);
}

.task-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.task-card.completed {
  border-left-color: var(--success-color);
}

.task-card.overdue {
  border-left-color: var(--error-color);
}

.task-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.task-title {
  font-size: 1.25rem;
  font-weight: 500;
  margin-right: 1rem;
}

.task-status {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-weight: 500;
}

.task-status.pending {
  background-color: rgba(255, 152, 0, 0.2);
  color: var(--warning-color);
}

.task-status.completed {
  background-color: rgba(76, 175, 80, 0.2);
  color: var(--success-color);
}

.task-status.overdue {
  background-color: rgba(207, 102, 121, 0.2);
  color: var(--error-color);
}

.task-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.task-description {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.task-actions-buttons {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

/* Collaboratori */
.collaborators-list {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  margin-top: 1.5rem;
}

.collaborator-card {
  background-color: var(--surface-dark);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.collaborator-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.collaborator-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background-color: var(--primary-color);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 500;
  color: white;
  margin-bottom: 1rem;
}

.collaborator-name {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.collaborator-email {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background-color: var(--surface-dark);
  border-radius: 8px;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 4px 20px var(--shadow-color);
  transform: translateY(-20px);
  transition: transform 0.3s ease;
}

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

.modal-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1.25rem;
  font-weight: 500;
}

.close-modal {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.3s ease;
}

.close-modal:hover {
  color: var(--error-color);
}

.modal-body {
  padding: 1.5rem;
}

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

/* Animazioni */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .dashboard-content {
    flex-direction: column;
  }
  
  .sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
  }
  
  .main-content {
    padding: 1.5rem;
  }
  
  .calendar-grid {
    grid-template-columns: repeat(7, 1fr);
    gap: 0.25rem;
  }
  
  .calendar-day {
    padding: 0.25rem;
  }
  
  .collaborators-list {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}