/* ========== BASE STYLES ========== */
:root {
  --primary: #4361ee;
  --primary-light: #eef1ff;
  --secondary: #3a0ca3;
  --accent: #7209b7;
  --warning: #f72585;
  --success: #4cc9f0;
  --light-gray: #f7f7fc;
  --dark-gray: #4a4b4c;
  --border-radius: 0.5rem;
  --box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f7ff;
  padding-bottom: 2rem;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: var(--dark-gray);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--secondary);
}

.container {
  max-width: 1200px;
}

/* ========== HEADER STYLES ========== */
header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  padding: 3rem 0 2.5rem;
  margin-bottom: 2rem;
  border-bottom-left-radius: 3rem;
  position: relative;
  overflow: hidden;
}

header::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -5%;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

header::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: 10%;
  width: 200px;
  height: 200px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

header h1 {
  font-weight: 700;
  color: white;
  margin-bottom: 1rem;
}

header p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 800px;
  margin: 0 auto;
}

/* ========== CARD STYLES ========== */
.card {
  border: none;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.card:hover {
  box-shadow: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.15);
  transform: translateY(-5px);
}

.card-title {
  font-weight: 600;
  margin-bottom: 1.25rem;
  color: var(--dark-gray);
}

.card-body {
  padding: 1.75rem;
}

/* ========== FEATURE ICONS ========== */
.feature-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.feature-icon-accent {
  background-color: rgba(114, 9, 183, 0.1);
  color: var(--accent);
}

.feature-icon-secondary {
  background-color: rgba(58, 12, 163, 0.1);
  color: var(--secondary);
}

.feature-icon-warning {
  background-color: rgba(247, 37, 133, 0.1);
  color: var(--warning);
}

/* ========== STATISTICS CARDS ========== */
.stat-card {
  text-align: center;
  padding: 1.5rem 1rem;
  position: relative;
  overflow: hidden;
  height: 100%;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--dark-gray);
  margin-bottom: 0;
}

.stat-icon {
  position: absolute;
  bottom: -15px;
  right: -15px;
  font-size: 4rem;
  opacity: 0.1;
  color: var(--primary);
}

/* ========== FEATURE CARDS ========== */
.feature-card {
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.feature-card .card-body {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.feature-card .feature-icon {
  margin-bottom: 1rem;
}

.feature-card h3 {
  margin-bottom: 0.75rem;
}

/* ========== CHARTS ========== */
.chart-container {
  position: relative;
  height: 300px;
  margin-bottom: 1rem;
}

.chart-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
}

.chart-dot-primary {
  background-color: var(--primary);
}

.chart-dot-success {
  background-color: var(--success);
}

.chart-dot-warning {
  background-color: var(--warning);
}

/* ========== FORMS ========== */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--dark-gray);
}

.form-select, .form-control {
  border-radius: var(--border-radius);
  border: 1px solid #dee2e6;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
}

.form-select:focus, .form-control:focus {
  box-shadow: 0 0 0 0.2rem rgba(67, 97, 238, 0.15);
  border-color: var(--primary);
}

.input-group-text {
  background-color: var(--light-gray);
  border-color: #dee2e6;
  font-size: 0.875rem;
}

.btn {
  padding: 0.5rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  transition: var(--transition);
}

.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
}

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--secondary);
  border-color: var(--secondary);
}

.btn-outline-primary {
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline-primary:hover, .btn-outline-primary:focus {
  background-color: var(--primary);
  color: white;
}

/* ========== PUBLICATION ITEMS ========== */
.publication-item {
  padding: 1.5rem;
  border-radius: var(--border-radius);
  background-color: var(--light-gray);
  height: 100%;
  transition: var(--transition);
}

.publication-item:hover {
  background-color: white;
  box-shadow: var(--box-shadow);
}

.publication-item h5 {
  margin-bottom: 0.5rem;
  color: var(--secondary);
}

/* ========== FOOTER ========== */
footer {
  background-color: #2b2d42;
  color: #edf2f4;
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-heading {
  color: white;
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
  font-weight: 600;
}

.footer-links {
  padding-left: 0;
  list-style: none;
}

.footer-link {
  display: block;
  padding: 0.5rem 0;
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}

.footer-link:hover {
  color: white;
  transform: translateX(5px);
}

.footer-social {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
  margin-right: 0.75rem;
  transition: var(--transition);
}

.footer-social:hover {
  background-color: var(--primary);
  color: white;
  transform: translateY(-3px);
}

.footer-divider {
  margin: 2rem 0;
  border-color: rgba(255, 255, 255, 0.1);
}

.copyright {
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

.newsletter-form .form-control {
  background-color: rgba(255, 255, 255, 0.1);
  border: none;
  color: white;
}

.newsletter-form .form-control::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.newsletter-form .btn {
  background-color: var(--primary);
  border-color: var(--primary);
}

/* ========== ANIMATIONS ========== */
.animate-fadeInUp {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 0.6s ease-out forwards;
}

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

/* ========== RESPONSIVE ADJUSTMENTS ========== */
@media (max-width: 992px) {
  header {
    padding: 2rem 0;
    border-bottom-left-radius: 2rem;
  }
  
  .chart-container {
    height: 250px;
  }
}

@media (max-width: 768px) {
  header {
    padding: 1.5rem 0;
    border-bottom-left-radius: 1.5rem;
  }
  
  .feature-icon {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .stat-value {
    font-size: 1.5rem;
  }
  
  .chart-container {
    height: 220px;
  }
}

@media (max-width: 576px) {
  header h1 {
    font-size: 1.75rem;
  }
  
  header p {
    font-size: 1rem;
  }
  
  .card-body {
    padding: 1.25rem;
  }
  
  .publication-item {
    padding: 1.25rem;
  }
}