:root {
  --bg-primary: #121212;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #242424;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --text-disabled: #6c6c6c;
  --gradient-primary: linear-gradient(135deg, #8e2de2, #4a00e0);
  --gradient-secondary: linear-gradient(135deg, #7f00ff, #00ffff);
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 8px 15px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 15px rgba(126, 87, 194, 0.4);
  --border-radius: 8px;
  --transition: all 0.3s ease;

  --priority-low: #4caf50;
  --priority-medium: #ff9800;
  --priority-high: #f44336;
  --priority-urgent: #9c27b0;

  --status-pending: #ff9800;
  --status-in-progress: #2196f3;
  --status-completed: #4caf50;
}

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

body {
  font-family: "Poppins", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-primary);
  background-color: var(--bg-tertiary);
}

.btn i {
  font-size: 0.9rem;
}

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

.btn-primary:hover {
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
  background-color: var(--bg-secondary);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-danger {
  background-color: #f44336;
  color: white;
}

.btn-danger:hover {
  background-color: #d32f2f;
}

.btn-success {
  background-color: #4caf50;
  color: white;
}

.btn-success:hover {
  background-color: #388e3c;
}

.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

input,
select,
textarea {
  background-color: var(--bg-tertiary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  padding: 0.75rem;
  font-family: inherit;
  font-size: 0.9rem;
  width: 100%;
  transition: var(--transition);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 0 0 2px rgba(142, 45, 226, 0.25);
}

textarea {
  min-height: 100px;
  resize: vertical;
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23a0a0a0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.7rem center;
  background-size: 1em;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
}

.form-group {
  margin-bottom: 1.5rem;
  flex: 1;
}

.form-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

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

.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 1000;
  overflow-y: auto;
}

.modal-content {
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-hover);
  animation: fadeIn 0.3s;
}

.confirm-content {
  max-width: 400px;
}

.modal-header {
  padding: 1.25rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background-color: var(--bg-secondary);
  z-index: 1;
}

.close-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 1.2rem;
  transition: var(--transition);
}

.close-btn:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
}

.toast {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  padding: 1rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-hover);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideIn 0.3s ease, fadeOut 0.3s ease 4.7s;
  max-width: 300px;
}

.toast i {
  font-size: 1.2rem;
}

.toast.success i {
  color: var(--status-completed);
}

.toast.error i {
  color: var(--priority-high);
}

.toast.info i {
  color: var(--status-in-progress);
}

.toast.warning i {
  color: var(--status-pending);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }
  to {
    opacity: 0;
  }
}

.undo-notification {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--bg-secondary);
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-hover);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  z-index: 1000;
  min-width: 300px;
  display: none;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    transform: translate(-50%, 100%);
    opacity: 0;
  }
  to {
    transform: translate(-50%, 0);
    opacity: 1;
  }
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #555;
}

@media (max-width: 768px) {
  .form-row {
    flex-direction: column;
  }
}