:root {
  --primary-color: #6a1b9a; /* UTP Purple */
  --primary-gradient: linear-gradient(135deg, #8e24aa 0%, #4a148c 100%);
  --secondary-color: #f50057; /* Pink accent */
  --bg-light: #f4f6f9;
  --bg-dark: #121212;
  --text-dark: #333;
  --text-light: #fff;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
  
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-light);
  color: var(--text-dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Glassmorphism Classes */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 16px;
}

/* Navbar */
.navbar {
  background: var(--primary-gradient);
  color: var(--text-light);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .brand {
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Mobile Menu Button (Hidden by default) */
.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  color: white;
  cursor: pointer;
  padding: 0.5rem;
}

/* Dropdown Menu Styles */
.nav-dropdown {
  position: relative;
  display: inline-block;
}
.nav-dropdown-content {
  display: none;
  position: absolute;
  background-color: white;
  min-width: 200px;
  box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.15);
  z-index: 1000;
  border-radius: 8px;
  overflow: hidden;
  top: 100%;
  left: 0;
  border: 1px solid #eee;
}
.nav-dropdown-content a {
  color: #333;
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  font-size: 0.9rem;
  transition: background-color 0.2s, color 0.2s;
}
.nav-dropdown-content a:hover, .nav-dropdown-content a.active {
  background-color: #f8f9fa;
  color: var(--primary-color);
  font-weight: 600;
}
.nav-dropdown:hover .nav-dropdown-content {
  display: block;
}
.nav-dropdown-btn {
  background: transparent;
  border: none;
  color: var(--text-light);
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: background-color 0.2s;
}
.nav-dropdown-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-links > a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 500;
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  transition: background-color 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-links > a:hover, .nav-links > a.active {
  background: rgba(255, 255, 255, 0.15);
}

}

/* Containers */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  flex: 1;
}

/* Forms and Inputs */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: #555;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-family: var(--font-family);
  font-size: 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(106, 27, 154, 0.2);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  text-align: center;
  font-size: 1rem;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.95);
}

.btn-primary {
  background: var(--primary-gradient);
  color: white;
  box-shadow: 0 4px 15px rgba(106, 27, 154, 0.4);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(106, 27, 154, 0.6);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--secondary-color);
  color: white;
  box-shadow: 0 4px 15px rgba(245, 0, 87, 0.4);
}

/* Event Cards */
.event-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

@media (max-width: 1024px) {
  .event-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 600px) {
  .event-grid {
    grid-template-columns: 1fr;
  }
}

.event-card {
  background: white;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 20px rgba(0,0,0,0.05);
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.3s;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.event-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(106, 27, 154, 0.15);
}

.event-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background-color: #eee;
}

.event-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Utilities */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Custom Scrollbar for tables */
.table-responsive::-webkit-scrollbar {
  height: 6px;
}
.table-responsive::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 4px;
}
.table-responsive::-webkit-scrollbar-thumb {
  background: #c1c1c1;
  border-radius: 4px;
}
.table-responsive::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}

.event-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.event-card-date {
  color: #888;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.event-card-footer {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid #eee;
  padding-top: 1rem;
}

.badge {
  padding: 0.25rem 0.75rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-free {
  background-color: #e8f5e9;
  color: #2e7d32;
}

.badge-paid {
  background-color: #ffebee;
  color: #c62828;
}

/* Auth Pages */
.auth-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 70px);
  padding: 2rem;
  background: url('https://www.transparenttextures.com/patterns/cubes.png') var(--bg-light);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  padding: 2.5rem;
}

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

.auth-header h2 {
  color: var(--primary-color);
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

/* Periodicity UI */
.day-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background-color: #e0e0e0;
  color: #555;
  font-weight: 600;
  transition: all 0.2s;
  user-select: none;
}
.day-btn.active {
  background-color: var(--primary-color);
  color: white;
}
.periodicity-panel {
  background: #fdfdfd;
  border: 1px solid #eee;
  padding: 1.5rem;
  border-radius: 8px;
  margin-top: 1rem;
}

/* Base Admin Layout */
.admin-layout { display: flex; min-height: calc(100vh - 70px); }
.sidebar { width: 250px; background: var(--bg-light); border-right: 1px solid #ddd; padding: 1.5rem; }
.sidebar a { display: block; padding: 0.75rem 1rem; color: #333; text-decoration: none; border-radius: 8px; margin-bottom: 0.5rem; font-weight: 500; }
.sidebar a:hover, .sidebar a.active { background: rgba(106, 27, 154, 0.1); color: var(--primary-color); }
.content { flex: 1; padding: 2rem; background: #f9f9f9; }

/* Responsive adjustments for Admin Layout */
@media (max-width: 768px) {
  .admin-layout {
    flex-direction: column !important;
  }
  .sidebar {
    width: 100% !important;
    border-right: none !important;
    border-bottom: 1px solid #ddd !important;
    padding: 1rem !important;
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 0.5rem !important;
  }
  .sidebar a {
    flex: 1 1 auto !important;
    text-align: center !important;
    margin-bottom: 0 !important;
    padding: 0.5rem !important;
    font-size: 0.85rem !important;
  }
  .sidebar div {
    width: 100% !important;
    text-align: center !important;
  }
  .content {
    padding: 1rem !important;
  }
  
  /* Hamburger Menu Adjustments */
  .navbar {
    padding: 1rem !important;
    flex-direction: row !important;
    flex-wrap: wrap;
    justify-content: space-between !important;
  }
  .mobile-menu-btn {
    display: flex !important;
  }
  .navbar .nav-links {
    width: 100% !important;
    flex-direction: column;
    align-items: stretch !important;
    display: none !important;
    margin-top: 1rem;
    gap: 0.2rem !important;
  }
  .navbar.menu-open .nav-links {
    display: flex !important;
  }
  .nav-links > a, .nav-dropdown-btn {
    padding: 0.8rem 1rem !important;
    width: 100%;
    justify-content: flex-start !important;
  }
  
  /* Hero Text Adjustments */
  #heroTitle {
    font-size: 2.2rem !important;
  }
  #heroSubtitle {
    font-size: 1rem !important;
    margin-bottom: 1.5rem !important;
  }
  
  /* Mobile Dropdown Adjustments */
  .nav-dropdown-content {
    position: static !important;
    width: 100% !important;
    box-shadow: none !important;
    border: none !important;
    border-left: 2px solid rgba(255,255,255,0.2) !important;
    background: rgba(0,0,0,0.05) !important;
    margin-top: 0 !important;
    padding-left: 1rem;
    border-radius: 0 !important;
  }
  .nav-dropdown-content a {
    color: var(--text-light) !important;
    text-align: left !important;
    padding: 0.8rem 1rem !important;
  }
  .nav-dropdown-content a:hover, .nav-dropdown-content a.active {
    background-color: rgba(255, 255, 255, 0.1) !important;
  }
}