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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 0;
  margin: 0;
}

.app-container {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
  display: flex;
  align-items: center;
  color: white;
  font-size: 24px;
  font-weight: 600;
}

.logo-icon {
  margin-right: 12px;
  font-size: 28px;
}

.nav-tabs {
  display: flex;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  padding: 6px;
  border-radius: 16px;
  backdrop-filter: blur(10px);
  white-space: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-tabs::-webkit-scrollbar {
  display: none;
}

.nav-tab {
  padding: 12px 20px;
  border-radius: 12px;
  color: rgba(255, 255, 255, 0.7);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
}

.nav-tab.active {
  background: rgba(255, 255, 255, 0.9);
  color: #667eea;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.nav-tab:hover:not(.active) {
  background: rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.9);
}

.main-content {
  padding: 30px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-bottom: 30px;
}

.stat-card {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 30px;
  color: white;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #4facfe 0%, #00f2fe 100%);
  border-radius: 20px 20px 0 0;
}

.stat-icon {
  font-size: 36px;
  margin-bottom: 16px;
  opacity: 0.8;
}

.stat-number {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 16px;
  opacity: 0.8;
  font-weight: 500;
}

.content-card {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 24px;
  padding: 32px;
  margin-bottom: 24px;
  color: white;
}

.card-header {
  display: flex;
  justify-content: space-between;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  align-items: center;
  margin-bottom: 24px;
}

.card-title {
  font-size: 20px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 12px;
}

.quick-add-container {
  display: flex;
  gap: 16px;
  align-items: stretch;
}

.quick-input {
  flex: 1;
  padding: 16px 20px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 16px;
  outline: none;
  transition: all 0.3s ease;
}

.quick-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.quick-input:focus {
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.15);
}

.add-button {
  padding: 16px 32px;
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  border: none;
  border-radius: 16px;
  color: white;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 8px 25px rgba(79, 172, 254, 0.3);
  white-space: nowrap;
}

.add-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 35px rgba(79, 172, 254, 0.4);
}

.add-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: rgba(255, 255, 255, 0.7);
}

.empty-icon {
  font-size: 64px;
  margin-bottom: 20px;
  opacity: 0.6;
}

.empty-text {
  font-size: 18px;
  margin-bottom: 8px;
}

.empty-subtext {
  font-size: 14px;
  opacity: 0.8;
}

.todo-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  margin-bottom: 12px;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.todo-item:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-1px);
}

.todo-checkbox {
  width: 24px;
  height: 24px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: all 0.3s ease;
  flex-shrink: 0;
  margin-top: 2px;
}

.todo-checkbox.checked {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  border-color: #4facfe;
}

.todo-checkbox.checked::after {
  content: "✓";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 14px;
  font-weight: bold;
}

.todo-content {
  flex: 1;
  min-width: 0;
}

.todo-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  line-height: 1.4;
}

.todo-description {
  font-size: 14px;
  opacity: 0.8;
  margin-bottom: 6px;
  line-height: 1.4;
}

.todo-time {
  font-size: 12px;
  opacity: 0.6;
  background: rgba(255, 255, 255, 0.1);
  padding: 4px 8px;
  border-radius: 6px;
  display: inline-block;
}

.todo-actions {
  display: flex;
  gap: 8px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.todo-item:hover .todo-actions {
  opacity: 1;
}

.action-button {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.action-button:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.action-button.delete:hover {
  background: rgba(239, 68, 68, 0.8);
}

.completed {
  text-decoration: line-through;
  opacity: 0.6;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-top: 20px;
}

.calendar-header {
  text-align: center;
  padding: 12px 8px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  font-size: 14px;
  font-weight: 500;
}

.calendar-day:hover {
  background: rgba(255, 255, 255, 0.2);
}

.calendar-day.today {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  color: white;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

.calendar-day.other-month {
  opacity: 0.3;
}

.calendar-day.has-todos::after {
  content: "";
  position: absolute;
  bottom: 4px;
  width: 6px;
  height: 6px;
  background: #ffd700;
  border-radius: 50%;
}

.todo-count {
  font-size: 10px;
  opacity: 0.7;
  margin-top: 2px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.form-select {
  padding: 14px 16px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 14px;
  outline: none;
  transition: all 0.3s ease;
}

.form-select:focus {
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.15);
}

.form-select option {
  background: #667eea;
  color: white;
}

.rating-container {
  text-align: center;
  padding: 40px 20px;
}

.rating-emoji {
  font-size: 80px;
  margin-bottom: 20px;
  display: block;
}

.rating-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.rating-message {
  font-size: 16px;
  opacity: 0.8;
  margin-bottom: 24px;
}

.progress-container {
  max-width: 300px;
  margin: 0 auto 16px;
}

.progress-bar {
  width: 100%;
  height: 12px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 12px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #4ade80, #06d6a0);
  border-radius: 6px;
  transition: width 0.8s ease;
}

.progress-text {
  font-size: 14px;
  opacity: 0.7;
}

.history-group {
  margin-bottom: 32px;
}

.history-date {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(255, 255, 255, 0.2);
}

.export-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.export-section {
  text-align: center;
}

.export-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.export-description {
  font-size: 14px;
  opacity: 0.8;
  margin-bottom: 20px;
  line-height: 1.5;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(8px);
}

.modal-content {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 24px;
  padding: 32px;
  max-width: 500px;
  width: 90%;
  color: white;
}

.modal-header {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 24px;
  text-align: center;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 14px;
  outline: none;
  transition: all 0.3s ease;
}

.form-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.form-input:focus {
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.15);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
}

.button {
  flex: 1;
  padding: 14px 24px;
  border: none;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.button-primary {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(79, 172, 254, 0.3);
}

.button-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79, 172, 254, 0.4);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
}

.button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  max-width: 400px;
}

.notification-item {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 16px;
  padding: 16px 20px;
  margin-bottom: 12px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  animation: slideIn 0.3s ease-out;
}

.notification-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  margin-top: 2px;
}

.notification-success .notification-icon {
  background: #10b981;
  color: white;
}

.notification-error .notification-icon {
  background: #ef4444;
  color: white;
}

.notification-warning .notification-icon {
  background: #f59e0b;
  color: white;
}

.notification-info .notification-icon {
  background: #3b82f6;
  color: white;
}

.notification-content {
  flex: 1;
  min-width: 0;
}

.notification-title {
  font-weight: 600;
  margin-bottom: 4px;
  color: #374151;
}

.notification-message {
  font-size: 14px;
  color: #6b7280;
  line-height: 1.4;
}

.notification-close {
  background: rgba(255, 255, 255, 0.8);
  border: 2px solid rgba(102, 126, 234, 0.2);
  color: #667eea;
  cursor: pointer;
  font-size: 15px;
  /* width: 32px;
  height: 32px; */
  padding: 5px;
  border-radius: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
  position: relative;
  overflow: hidden;
}

.notification-close:hover {
  background: #667eea;
  color: white;
  border-color: #667eea;
  transform: scale(1.1);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

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

@media (max-width: 768px) {
  .header {
    padding: 16px 20px;
    flex-direction: column;
    gap: 16px;
  }

  .nav-tabs {
    width: 100%;
    justify-content: space-around;
  }

  .main-content {
    padding: 20px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .quick-add-container {
    flex-direction: column;
  }

  .calendar-grid {
    gap: 2px;
  }

  .modal-content {
    margin: 20px;
    width: calc(100% - 40px);
  }
}