/* Modern Bootstrap 5 Design Enhancements */

:root {
  /* Brand Colors from Logo */
  --primary-red: #dc3545;
  --primary-blue: #0d6efd;
  --primary-green: #198754;
  --primary-orange: #fd7e14;
  --primary-dark: #212529;
  
  /* Brand Gradients */
  --primary-gradient: linear-gradient(135deg, #dc3545 0%, #fd7e14 100%);
  --secondary-gradient: linear-gradient(135deg, #0d6efd 0%, #198754 100%);
  --success-gradient: linear-gradient(135deg, #198754 0%, #20c997 100%);
  --dark-gradient: linear-gradient(135deg, #212529 0%, #495057 100%);
  
  /* Readable Colors */
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-light: #adb5bd;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  
  /* Modern Shadows */
  --shadow-soft: 0 2px 20px rgba(33, 37, 41, 0.08);
  --shadow-medium: 0 8px 30px rgba(33, 37, 41, 0.12);
  --shadow-hard: 0 15px 35px rgba(33, 37, 41, 0.15);
  
  /* Modern Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Modern Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

/* Dark Mode Support */
[data-bs-theme="dark"] {
  --bs-body-bg: #1a1a1a;
  --bs-body-color: #e9ecef;
  --bs-border-color: #404040;
}

/* Modern Typography - Readable */
.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

/* Gradient text only for special elements */
.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Improved text contrast */
body {
  color: var(--text-primary);
  font-size: 1rem;
  line-height: 1.6;
}

.text-muted {
  color: var(--text-secondary) !important;
}

.lead {
  font-size: 1.125rem;
  font-weight: 400;
  color: var(--text-primary);
}

/* Modern Hero Section */
.hero-modern {
  background: var(--primary-gradient);
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-modern::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="white" opacity="0.1"><polygon points="1000,100 1000,0 0,100"/></svg>');
  background-size: cover;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: white;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  opacity: 0.9;
  margin-bottom: var(--spacing-xl);
}

/* Modern Cards */
.card-modern {
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
  background: white;
}

.card-modern:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hard);
}

.card-modern .card-header {
  background: var(--primary-gradient);
  color: white;
  border: none;
  padding: var(--spacing-md);
  font-weight: 600;
}

.card-modern .card-body {
  padding: var(--spacing-lg);
}

/* Glassmorphism Effect */
.glass-card {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-medium);
}

/* Modern Buttons */
.btn-modern {
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn-modern::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn-modern:hover::before {
  left: 100%;
}

.btn-primary-modern {
  background: var(--primary-red);
  border: 2px solid var(--primary-red);
  color: white;
  font-weight: 600;
}

.btn-primary-modern:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: white;
}

.btn-success-modern {
  background: var(--primary-green);
  border: 2px solid var(--primary-green);
  color: white;
  font-weight: 600;
}

.btn-success-modern:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: white;
}

.btn-danger-modern {
  background: var(--primary-orange);
  border: 2px solid var(--primary-orange);
  color: white;
  font-weight: 600;
}

.btn-danger-modern:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: white;
}

/* Modern Navigation - Clean Professional Design */
.navbar {
  background: white !important;
  border-bottom: 2px solid #e9ecef;
  padding: 1rem 0 !important;
  transition: all 0.3s ease;
  min-height: 80px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.navbar.scrolled,
.navbar-shrink {
  background: white !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  padding: 0.75rem 0 !important;
  border-bottom: 2px solid var(--primary-red);
}

/* Brand styling - Keep red logo */
.navbar-brand {
  font-weight: 800 !important;
  font-size: 1.6rem !important;
  color: var(--primary-red) !important;
  text-decoration: none !important;
  text-shadow: none !important;
}

.navbar-brand:hover {
  color: var(--primary-dark) !important;
  text-decoration: none !important;
  transform: scale(1.02);
}

/* Navigation links - Modern clean style */
.navbar-nav {
  align-items: center;
}

.navbar-nav .nav-link {
  position: relative;
  transition: all 0.3s ease;
  padding: 0.8rem 1.5rem !important;
  border-radius: var(--radius-lg);
  font-size: 1rem !important;
  font-weight: 600 !important;
  color: var(--text-primary) !important;
  text-transform: none;
  letter-spacing: 0.3px;
  margin: 0 0.25rem;
  text-align: center;
}

.navbar-nav .nav-link:hover {
  background: var(--primary-red) !important;
  color: white !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(220, 53, 69, 0.3);
}

.navbar-nav .nav-link.active {
  background: var(--primary-red) !important;
  color: white !important;
  font-weight: 700 !important;
  box-shadow: 0 2px 8px rgba(220, 53, 69, 0.25);
}

/* Modern navbar toggler */
.navbar-toggler {
  border: 2px solid var(--primary-red) !important;
  border-radius: var(--radius-md);
  padding: 0.6rem 0.8rem !important;
  transition: all 0.3s ease;
}

.navbar-toggler:hover {
  background: var(--primary-red) !important;
  transform: scale(1.05);
}

.navbar-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28220, 53, 69, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
  transition: all 0.3s ease;
}

.navbar-toggler:hover .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 1%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}

/* Mobile menu improvements */
@media (max-width: 991.98px) {
  .navbar-collapse {
    background: white;
    border-radius: 8px;
    padding: 0.75rem;
    margin-top: 0.5rem;
    border: 2px solid #e9ecef;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  
  .navbar-nav .nav-link {
    padding: 0.6rem 1rem !important;
    margin: 0.2rem 0;
    border-radius: 6px;
    width: 100%;
    text-align: left;
    font-size: 0.9rem !important;
  }
  
  .navbar-nav .nav-link:hover {
    transform: translateX(3px);
  }
  
  /* Compact dropdown menu */
  .dropdown-menu {
    position: static !important;
    transform: none !important;
    border: none;
    box-shadow: none;
    background: rgba(248, 249, 250, 0.8);
    padding: 0.5rem;
    margin: 0.25rem 0;
    border-radius: 6px;
  }
  
  .dropdown-item {
    padding: 0.4rem 0.75rem !important;
    font-size: 0.85rem !important;
    margin: 0.1rem 0;
    border-radius: 4px;
  }
  
  .dropdown-header {
    padding: 0.3rem 0.75rem !important;
    font-size: 0.8rem !important;
    margin: 0.2rem 0;
  }
  
  .dropdown-divider {
    margin: 0.3rem 0;
  }
}

/* Container improvements */
.navbar .container,
.navbar .container-fluid {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Remove old hover effects */
.navbar-nav .nav-link:hover::after {
  display: none;
}

/* Add subtle animation to navbar */
.navbar {
  animation: slideDownNavbar 0.5s ease-out;
}

@keyframes slideDownNavbar {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Modern Form Elements */
.form-control-modern {
  border-radius: var(--radius-md);
  border: 2px solid #e9ecef;
  padding: var(--spacing-sm) var(--spacing-md);
  transition: all 0.3s ease;
  background: white;
}

.form-control-modern:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
  transform: translateY(-2px);
}

/* Modern Tables */
.table-modern {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  border: none;
}

.table-modern thead {
  background: var(--dark-gradient);
  color: white;
}

.table-modern tbody tr:hover {
  background: rgba(13, 110, 253, 0.05);
  transform: scale(1.01);
  transition: all 0.2s ease;
}

/* Current exam highlighting */
.table-modern tbody tr.table-warning {
  background: rgba(255, 193, 7, 0.15) !important;
  border: 2px solid var(--primary-orange);
}

.table-modern tbody tr.table-warning:hover {
  background: rgba(255, 193, 7, 0.25) !important;
}

/* Next exam highlighting */
.table-modern tbody tr.table-info {
  background: rgba(13, 202, 240, 0.1) !important;
  border: 1px solid rgba(13, 202, 240, 0.3);
}

.table-modern tbody tr.table-info:hover {
  background: rgba(13, 202, 240, 0.2) !important;
}

/* Past exam dimming */
.table-modern tbody tr.table-secondary {
  background: rgba(108, 117, 125, 0.1) !important;
  color: #6c757d;
}

.table-modern tbody tr.table-secondary:hover {
  background: rgba(108, 117, 125, 0.15) !important;
}

/* Exam status icons */
.fas.fa-star {
  animation: pulse 2s infinite;
}

.fas.fa-clock {
  animation: tick 1s infinite;
}

@keyframes tick {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(5deg); }
  75% { transform: rotate(-5deg); }
}

/* Flag icons styling */
.flag-icon {
  width: 1.33em;
  line-height: 1;
  display: inline-block;
  border-radius: 2px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.flag-icon-gb {
  background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTAwIiBoZWlnaHQ9IjYwIiB2aWV3Qm94PSIwIDAgMTAwIDYwIiBmaWxsPSJub25lIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPgo8cmVjdCB3aWR0aD0iMTAwIiBoZWlnaHQ9IjYwIiBmaWxsPSIjMDEyMTY5Ii8+CjxwYXRoIGQ9Ik0wIDBoMTAwdjEwSDEwdjQwaDEwdjEwSDB2LTEwaDEwVjEwSDBWMHoiIGZpbGw9IndoaXRlIi8+CjxwYXRoIGQ9Ik0wIDBoMTAwdjZIMTR2NDhoNnYxMEgwdi02aDZ2LTQwSDBWMHoiIGZpbGw9IiNERTI5MUIiLz4KPC9zdmc+');
  background-size: cover;
}

.flag-icon-de {
  background: linear-gradient(to bottom, #000 33.33%, #DD0000 33.33%, #DD0000 66.66%, #FFCE00 66.66%);
  border-radius: 2px;
}

/* Improved readability for table cells */
.table-modern td {
  color: var(--text-primary);
  font-weight: 400;
  vertical-align: middle;
}

.table-modern .fw-bold {
  font-weight: 600 !important;
}

/* Info button improvements */
.table-modern .btn-outline-danger {
  border-color: var(--primary-red);
  color: var(--primary-red);
  font-weight: 600;
}

.table-modern .btn-outline-danger:hover {
  background: var(--primary-red);
  border-color: var(--primary-red);
  color: white;
}

/* Modern Alerts */
.alert-modern {
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border-left: 4px solid;
  box-shadow: var(--shadow-soft);
}

.alert-modern.alert-warning {
  background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
  border-left-color: #ffc107;
}

.alert-modern.alert-info {
  background: linear-gradient(135deg, #d1ecf1 0%, #a8e6cf 100%);
  border-left-color: #17a2b8;
}

.alert-modern.alert-danger {
  background: linear-gradient(135deg, #f8d7da 0%, #ff7675 100%);
  border-left-color: #dc3545;
}

/* Modern Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

.animate-fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

.animate-slide-in-left {
  animation: slideInLeft 0.8s ease-out;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

/* Modern Loading States */
.loading-modern {
  position: relative;
  overflow: hidden;
}

.loading-modern::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Modern Spacing Utilities */
.py-section { padding: var(--spacing-xl) 0; }
.my-section { margin: var(--spacing-xl) 0; }

/* Modern Responsive Design */
@media (max-width: 768px) {
  .hero-modern {
    min-height: 70vh;
    text-align: center;
  }
  
  .card-modern {
    margin-bottom: var(--spacing-md);
  }
  
  .btn-modern {
    width: 100%;
    margin-bottom: var(--spacing-sm);
  }
}

/* Dark Mode Toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1050;
  background: var(--primary-gradient);
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  color: white;
  box-shadow: var(--shadow-medium);
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-hard);
}

/* Modern Icon Styles */
.icon-modern {
  width: 3rem;
  height: 3rem;
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-soft);
}

/* Modern Section Dividers */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, #e9ecef, transparent);
  margin: var(--spacing-xl) 0;
}

/* Year selector buttons - work on both orange and red gradient backgrounds */
.btn-outline-primary {
  border-color: white !important;
  color: white !important;
  background: rgba(255, 255, 255, 0.15);
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-outline-primary:hover {
  background: rgba(255, 255, 255, 0.9) !important;
  border-color: white !important;
  color: var(--primary-dark) !important;
  text-shadow: none;
  transform: translateY(-1px);
}

.btn-outline-primary.active {
  background: white !important;
  border-color: white !important;
  color: var(--primary-dark) !important;
  font-weight: 700;
  text-shadow: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

/* Modern Parallax Background */
.parallax-bg {
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  position: relative;
}

.parallax-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
}