/**
 * Reusable Component Styles
 * 
 * This file contains styles for reusable UI components across the website.
 * Components are designed to work with Bootstrap 5 and extend its functionality.
 */

/* ===========================
 * Navigation Components
 * =========================== */

.navbar-custom {
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.navbar-custom.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar-custom .navbar-brand {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  font-size: var(--font-size-xl);
}

.navbar-custom .nav-link {
  font-family: var(--font-body);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.navbar-custom .nav-link:hover,
.navbar-custom .nav-link:focus {
  color: var(--color-primary);
  background-color: var(--color-bg-secondary);
}

.navbar-custom .nav-link.active {
  color: var(--color-primary);
  background-color: rgba(var(--color-primary-rgb), 0.1);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  padding: var(--spacing-2);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-secondary);
}

/* ===========================
 * Hero Section
 * =========================== */

.hero-section {
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
  padding: var(--spacing-16) 0;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%231a365d' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
  pointer-events: none;
}

[data-bs-theme="dark"] .hero-section {
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

/* ===========================
 * Profile Image
 * =========================== */

.profile-image {
  border-radius: var(--radius-full);
  border: 4px solid var(--color-bg-primary);
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-slow);
}

.profile-image:hover {
  transform: scale(1.02);
}

.profile-image-wrapper {
  position: relative;
  display: inline-block;
}

.profile-image-wrapper::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  z-index: -1;
  opacity: 0.3;
}

/* ===========================
 * Section Styles
 * =========================== */

.section-title {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-6);
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.section-title i {
  color: var(--color-primary);
}

.section-title::after {
  content: '';
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--color-border), transparent);
  margin-left: var(--spacing-4);
}

.section-subtitle {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-4);
}

/* ===========================
 * Card Components
 * =========================== */

.card-custom {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card-custom:hover {
  box-shadow: var(--shadow-md);
}

/* Hover Lift Effect */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Feature Card */
.feature-card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  text-align: center;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: all var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
  color: inherit;
  text-decoration: none;
}

.feature-card .icon {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-4);
  display: block;
}

.feature-card .icon-primary { color: var(--color-primary); }
.feature-card .icon-success { color: var(--color-success); }
.feature-card .icon-warning { color: var(--color-warning); }
.feature-card .icon-forest { color: var(--color-forest); }

.feature-card h3 {
  font-family: var(--font-heading);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2);
}

.feature-card p {
  color: var(--color-text-muted);
  margin-bottom: 0;
  font-size: var(--font-size-sm);
}

/* Publication Card */
.publication-card {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--spacing-4);
  margin-bottom: var(--spacing-4);
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-4);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.publication-card .title {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-1);
}

.publication-card .authors {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.publication-card .journal {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  font-style: italic;
}

/* ===========================
 * Badge Components
 * =========================== */

.badge-custom {
  font-family: var(--font-body);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-xs);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
}

.badge-research {
  background-color: var(--color-primary);
  color: white;
}

.badge-year {
  background-color: var(--color-success);
  color: white;
}

/* ===========================
 * Button Components
 * =========================== */

.btn-custom {
  font-family: var(--font-body);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

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

.btn-primary-custom:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline-custom {
  background-color: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

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

/* Icon Button */
.btn-icon {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
}

/* ===========================
 * List Components
 * =========================== */

.list-custom {
  list-style: none;
  padding: 0;
  margin: 0;
}

.list-custom li {
  padding: var(--spacing-3) 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
}

.list-custom li:last-child {
  border-bottom: none;
}

.list-custom li::before {
  content: '→';
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
}

/* ===========================
 * Timeline Component
 * =========================== */

.timeline {
  position: relative;
  padding-left: var(--spacing-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-8);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-8) - 1px);
  top: var(--spacing-1);
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  border: 2px solid var(--color-bg-primary);
  box-shadow: var(--shadow-sm);
}

.timeline-item .date {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-1);
}

.timeline-item .title {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-1);
}

.timeline-item .description {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* ===========================
 * Contact Info Component
 * =========================== */

.contact-info-box {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  border: 1px solid var(--color-border);
}

.contact-info-box .info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  margin-bottom: var(--spacing-4);
}

.contact-info-box .info-item:last-child {
  margin-bottom: 0;
}

.contact-info-box .info-item i {
  color: var(--color-primary);
  font-size: var(--font-size-lg);
  margin-top: var(--spacing-1);
}

/* ===========================
 * Footer Component
 * =========================== */

.footer-custom {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
  padding: var(--spacing-12) 0 var(--spacing-6);
}

.footer-custom a {
  color: var(--color-text-inverse);
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer-custom a:hover {
  opacity: 1;
  color: var(--color-accent-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-6);
  margin-top: var(--spacing-8);
}

/* ===========================
 * Highlight Box
 * =========================== */

.highlight-box {
  background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.05), rgba(var(--color-primary-rgb), 0.1));
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
}

.highlight-box.success {
  background: linear-gradient(135deg, rgba(56, 161, 105, 0.05), rgba(56, 161, 105, 0.1));
  border-color: rgba(56, 161, 105, 0.2);
}

/* ===========================
 * Sidebar Navigation
 * =========================== */

.sidebar-nav {
  position: sticky;
  top: calc(var(--navbar-height) + var(--spacing-4));
}

.sidebar-nav .nav-link {
  color: var(--color-text-secondary);
  padding: var(--spacing-2) var(--spacing-4);
  border-left: 2px solid transparent;
  margin-bottom: var(--spacing-1);
  transition: all var(--transition-fast);
}

.sidebar-nav .nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-bg-secondary);
  border-left-color: var(--color-border);
}

.sidebar-nav .nav-link.active {
  color: var(--color-primary);
  background-color: rgba(var(--color-primary-rgb), 0.1);
  border-left-color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

/* ===========================
 * Back to Top Button
 * =========================== */

.back-to-top {
  position: fixed;
  bottom: var(--spacing-6);
  right: var(--spacing-6);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background-color: var(--color-primary);
  color: white;
  border: none;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-fixed);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-4px);
}

/* ===========================
 * Loading Skeleton
 * =========================== */

.skeleton {
  background: linear-gradient(90deg, var(--color-bg-secondary) 25%, var(--color-bg-tertiary) 50%, var(--color-bg-secondary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===========================
 * Responsive Adjustments
 * =========================== */

@media (max-width: 768px) {
  .hero-section {
    padding: var(--spacing-8) 0;
  }
  
  .section-title {
    font-size: var(--font-size-xl);
  }
  
  .section-title::after {
    display: none;
  }
  
  .timeline {
    padding-left: var(--spacing-6);
  }
  
  .timeline-item::before {
    left: calc(-1 * var(--spacing-6) - 1px);
    width: 10px;
    height: 10px;
  }
}