/* Modern Calendar System - CSS */
:root {
  --primary-color: #667eea;
  --secondary-color: #764ba2;
  --accent-color: #f093fb;
  --success-color: #4facfe;
  --warning-color: #f6d365;
  --danger-color: #fa709a;
  --dark-color: #2c3e50;
  --light-color: #ecf0f1;
  --white: #ffffff;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

.modern-calendar {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  max-width: 400px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}

.modern-calendar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, rgba(255,255,255,0.1), transparent);
  pointer-events: none;
}

.modern-calendar::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color), var(--accent-color));
  border-radius: calc(var(--border-radius) + 2px);
  z-index: -1;
  opacity: 0.3;
  filter: blur(8px);
}

.calendar-header {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 20px;
  text-align: center;
  color: var(--white);
  position: relative;
}

.calendar-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 10px 0;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.calendar-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 15px;
}

.nav-btn {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: var(--white);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

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

.current-date {
  font-size: 1.1rem;
  font-weight: 500;
  min-width: 200px;
}

.calendar-body {
  background: var(--white);
  padding: 20px;
}

.weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
  margin-bottom: 10px;
}

.weekday {
  text-align: center;
  font-weight: 600;
  color: var(--dark-color);
  padding: 10px 5px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.days-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
}

.day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.day:hover {
  transform: scale(1.05);
}

.day.other-month {
  color: #bdc3c7;
}

.day.today {
  background: linear-gradient(135deg, var(--success-color), #00d2ff);
  color: var(--white);
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

.day.selected {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.day.weekend {
  color: var(--danger-color);
}

.day.holiday {
  background: linear-gradient(135deg, var(--warning-color), var(--accent-color));
  color: var(--white);
  font-weight: 600;
  position: relative;
}

.day.holiday::after {
  content: '🎉';
  position: absolute;
  top: -5px;
  right: -5px;
  font-size: 0.7rem;
}

.day:not(.other-month):not(.today):not(.selected):hover {
  background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
  color: var(--white);
  transform: scale(1.1);
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.selected-date-display {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 15px 20px;
  text-align: center;
  color: var(--white);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.selected-date-text {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
}

.calendar-footer {
  background: rgba(255, 255, 255, 0.05);
  padding: 15px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.calendar-type-selector {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--white);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

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

.today-btn {
  background: linear-gradient(135deg, var(--success-color), #00d2ff);
  border: none;
  color: var(--white);
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
  font-size: 0.9rem;
}

.today-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(79, 172, 254, 0.4);
}

/* Date Display Component */
.date-display {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
  padding: 20px;
  border-radius: var(--border-radius);
  margin: 20px 0;
  text-align: center;
  box-shadow: var(--shadow);
}

.date-display-main {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.date-display-details {
  font-size: 1rem;
  opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 480px) {
  .modern-calendar {
    max-width: 100%;
    margin: 10px;
  }
  
  .calendar-header {
    padding: 15px;
  }
  
  .calendar-title {
    font-size: 1.3rem;
  }
  
  .day {
    font-size: 0.9rem;
  }
}

/* Animation Classes */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.calendar-animate {
  animation: slideIn 0.5s ease-out;
}

/* Enhanced Theme Variations */
.theme-dark {
  --primary-color: #2c3e50;
  --secondary-color: #34495e;
  --accent-color: #e74c3c;
  --success-color: #27ae60;
  --warning-color: #f39c12;
  --white: #ecf0f1;
  --dark-color: #2c3e50;
}

.theme-green {
  --primary-color: #11998e;
  --secondary-color: #38ef7d;
  --accent-color: #06d6a0;
  --success-color: #20bf6b;
  --warning-color: #f7b731;
}

.theme-purple {
  --primary-color: #8e44ad;
  --secondary-color: #9b59b6;
  --accent-color: #e056fd;
  --success-color: #00d2d3;
  --warning-color: #ff9ff3;
}

.theme-orange {
  --primary-color: #ff6348;
  --secondary-color: #ff7675;
  --accent-color: #fdcb6e;
  --success-color: #00b894;
  --warning-color: #e17055;
}

.theme-ocean {
  --primary-color: #0984e3;
  --secondary-color: #74b9ff;
  --accent-color: #00cec9;
  --success-color: #00b894;
  --warning-color: #fdcb6e;
}

.theme-sunset {
  --primary-color: #fd79a8;
  --secondary-color: #fdcb6e;
  --accent-color: #e84393;
  --success-color: #00b894;
  --warning-color: #e17055;
}