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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  color: #333;
  line-height: 1.6;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  animation: fadeIn 0.8s ease-out;
}

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

.header {
  text-align: center;
  margin-bottom: 30px;
  animation: slideDown 0.6s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.title {
  font-size: 2.5rem;
  font-weight: 300;
  color: white;
  margin-bottom: 15px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.month-selector {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 25px;
  padding: 10px 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-btn {
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 5px 10px;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.nav-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.current-month {
  color: white;
  font-size: 1.2rem;
  font-weight: 500;
  min-width: 150px;
}

.summary-card,
.add-expense-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 25px;
  margin-bottom: 25px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.summary-card {
  display: flex;
  justify-content: space-around;
  text-align: center;
}

.summary-item {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.summary-label {
  font-size: 0.9rem;
  color: #666;
  font-weight: 500;
}

.summary-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: #4a5568;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif, "Vazir",
    "Tahoma";
}

.add-expense-card h3 {
  margin-bottom: 20px;
  color: #4a5568;
  font-weight: 600;
}

.input-group {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.input-group input {
  flex: 1;
  min-width: 120px;
  padding: 12px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: white;
}

.input-group input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  transform: translateY(-2px);
}

.add-btn {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.add-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.add-btn:active {
  transform: translateY(0);
}

.calendar-container {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 25px;
  margin-bottom: 25px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: slideUp 0.8s ease-out;
}

.calendar {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  margin-top: 15px;
}

.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;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
}

.calendar-day:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.calendar-day.has-expense {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-weight: 600;
}

.calendar-day.today {
  border: 2px solid #667eea;
  font-weight: 700;
}

.day-number {
  font-size: 1rem;
  margin-bottom: 2px;
}

.day-amount {
  font-size: 0.7rem;
  opacity: 0.8;
  white-space: nowrap;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif, "Vazir",
    "Tahoma";
}

.expenses-list {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 25px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: slideUp 1s ease-out;
}

.expenses-list h3 {
  margin-bottom: 20px;
  color: #4a5568;
  font-weight: 600;
}

.expense-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  margin-bottom: 10px;
  background: #f8fafc;
  border-radius: 12px;
  border-left: 4px solid #667eea;
  transition: all 0.3s ease;
  animation: slideIn 0.5s ease-out;
}

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

.expense-item:hover {
  transform: translateX(5px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.expense-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.expense-description {
  font-weight: 600;
  color: #4a5568;
}

.expense-date {
  font-size: 0.8rem;
  color: #718096;
}

.expense-amount {
  font-weight: 700;
  color: #e53e3e;
  font-size: 1.1rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif, "Vazir",
    "Tahoma";
}

.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  animation: fadeIn 0.3s ease-out;
}

.modal-content {
  background: white;
  margin: 10% auto;
  padding: 0;
  border-radius: 20px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: modalSlide 0.3s ease-out;
}

@keyframes modalSlide {
  from {
    opacity: 0;
    transform: translateY(-50px) scale(0.9);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  border-bottom: 1px solid #e2e8f0;
}

.modal-header h3 {
  color: #4a5568;
  font-weight: 600;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #718096;
  padding: 5px;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.close-btn:hover {
  background: #f7fafc;
  color: #4a5568;
}

.modal-body {
  padding: 25px;
  overflow-y: auto;
  max-height: 70vh;
}

.day-expenses {
  margin-bottom: 20px;
}

.modal-total {
  text-align: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: #4a5568;
  padding: 15px;
  background: #f8fafc;
  border-radius: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif, "Vazir",
    "Tahoma";
}

@media (max-width: 768px) {
  .container {
    padding: 15px;
  }

  .title {
    font-size: 2rem;
  }

  .summary-card {
    flex-direction: column;
    gap: 20px;
  }

  .input-group {
    flex-direction: column;
  }

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

  .calendar {
    gap: 4px;
  }

  .day-number {
    font-size: 0.9rem;
  }

  .day-amount {
    font-size: 0.6rem;
  }
}

.pulse {
  animation: pulse 0.6s ease-in-out;
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}

@media (max-width: 600px) {
  .calendar {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
    overflow-x: auto;
    padding: 10px;
    max-width: 100%;
    box-sizing: border-box;
  }

  .calendar-day {
    min-width: 44px;
    font-size: 0.9rem;
    padding: 6px;
  }
}