/* ============================================
   SECTIONS STYLESHEET
   ============================================
   Styles for individual page sections:
   - Header/Navigation
   - Hero
   - About
   - Work Experience
   - Certifications
   - Portfolio
   - Skills
   - Contact/Footer
   ============================================ */

/* ========== HEADER / NAVIGATION ========== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-sticky);
  transition: all var(--transition-base);
}

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

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) var(--spacing-lg);
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--text-primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xl);
  align-items: center;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-green);
}

/* Underline effect on active link */
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--primary-green), var(--primary-blue));
  border-radius: var(--radius-full);
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

/* ========== HERO SECTION ========== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(135deg, var(--primary-green), var(--primary-blue));
  background-size: 200% 200%;
  animation: gradientShift 15s ease infinite;
  color: white;
  text-align: center;
  padding: var(--spacing-4xl) var(--spacing-lg);
}

.hero-content {
  max-width: 800px;
  z-index: var(--z-base);
}

.hero-image {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 6px solid rgba(255, 255, 255, 0.3);
  margin: 0 auto var(--spacing-2xl);
  object-fit: cover;
  box-shadow: var(--shadow-2xl);
}

.hero-title {
  font-size: var(--text-6xl);
  margin-bottom: var(--spacing-lg);
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
  font-size: var(--text-2xl);
  font-weight: var(--font-medium);
  margin-bottom: var(--spacing-xl);
  color: rgba(255, 255, 255, 0.95);
}

.hero-description {
  font-size: var(--text-lg);
  margin-bottom: var(--spacing-2xl);
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.hero .btn-primary {
  background: white;
  color: var(--primary-green);
}

.hero .btn-primary:hover {
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary-green-dark);
}

.hero .btn-outline {
  border-color: white;
  color: white;
}

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

/* ========== ABOUT SECTION ========== */

.about {
  padding: var(--spacing-5xl) 0;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

.about-image {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  height: auto;
}

.about-text h2 {
  margin-bottom: var(--spacing-xl);
}

.about-text p {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--spacing-lg);
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.highlight-icon {
  width: 24px;
  height: 24px;
  color: var(--primary-green);
  flex-shrink: 0;
}

.social-links {
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.social-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--gray-100);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  font-weight: var(--font-medium);
}

.social-link:hover {
  background-color: var(--primary-green-light);
  color: var(--primary-green-dark);
  transform: translateY(-2px);
}

/* ========== WORK EXPERIENCE SECTION ========== */

.experience {
  background-color: var(--background-alt);
  padding: var(--spacing-5xl) 0;
}

.timeline {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

/* Vertical timeline line */
.timeline::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary-green), var(--primary-blue));
}

.timeline-item {
  position: relative;
  padding-left: 80px;
  margin-bottom: var(--spacing-3xl);
  cursor: pointer;
}

/* Timeline dot */
.timeline-item::before {
  content: '';
  position: absolute;
  left: 22px;
  top: 8px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--primary-green);
  border: 4px solid var(--background-alt);
  z-index: var(--z-base);
  transition: all var(--transition-base);
}

.timeline-item:hover::before {
  background-color: var(--primary-blue);
  transform: scale(1.3);
}

.experience-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.experience-card:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-xl);
}

.experience-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.experience-title {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-xs);
  line-height: var(--leading-tight);
  font-weight: var(--font-bold);
}

.experience-company {
  color: var(--primary-green);
  font-weight: var(--font-semibold);
  font-size: var(--text-lg);
}

.experience-date {
  color: var(--text-muted);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.experience-description {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.experience-achievements {
  display: none; /* Show in modal */
}

.experience-tools {
  display: none; /* Show in modal */
}

/* ========== EXPERIENCE MODAL ========== */

.experience-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: var(--z-modal-backdrop);
  overflow-y: auto;
  padding: var(--spacing-xl);
}

.experience-modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.experience-modal-content {
  background: white;
  border-radius: var(--radius-xl);
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: fadeIn 0.3s ease-out;
}

.experience-modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 40px;
  height: 40px;
  background: white;
  border: none;
  border-radius: 50%;
  font-size: var(--text-2xl);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-base);
  transition: all var(--transition-base);
}

.experience-modal-close:hover {
  background-color: var(--gray-100);
  transform: rotate(90deg);
}

.experience-modal-header {
  background: linear-gradient(135deg, var(--primary-green), var(--primary-blue));
  color: white;
  padding: var(--spacing-3xl);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.experience-modal-title {
  font-size: var(--text-3xl);
  margin-bottom: var(--spacing-sm);
  color: white;
}

.experience-modal-company {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  margin-bottom: var(--spacing-xs);
  color: rgba(255, 255, 255, 0.95);
}

.experience-modal-date {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.9);
}

.experience-modal-body {
  padding: var(--spacing-3xl);
}

.experience-modal-section {
  margin-bottom: var(--spacing-2xl);
}

.experience-modal-section h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-md);
  color: var(--primary-green);
}

.experience-modal-section p {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
}

.experience-modal-section ul {
  list-style: none;
  padding-left: 0;
}

.experience-modal-section li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: var(--text-base);
}

.experience-modal-section li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-green);
  font-weight: var(--font-bold);
}

.experience-modal-tools {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

/* ========== CERTIFICATIONS SECTION ========== */

.certifications {
  padding: var(--spacing-5xl) 0;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.cert-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.cert-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-green);
}

.cert-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary-green-light), var(--primary-blue-light));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-4xl);
}

.cert-name {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-sm);
}

.cert-issuer {
  color: var(--primary-blue);
  font-weight: var(--font-medium);
  margin-bottom: var(--spacing-sm);
}

.cert-date {
  color: var(--text-muted);
  font-size: var(--text-sm);
}

.cert-link {
  display: inline-block;
  margin-top: var(--spacing-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

/* ========== PORTFOLIO SECTION ========== */

.portfolio {
  background-color: var(--background-alt);
  padding: var(--spacing-5xl) 0;
}

.portfolio-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-3xl);
}

.filter-btn {
  padding: var(--spacing-md) var(--spacing-xl);
  background-color: white;
  border: 2px solid var(--border);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-btn:hover {
  border-color: var(--primary-green);
  color: var(--primary-green);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--primary-green), var(--primary-blue));
  color: white;
  border-color: transparent;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.project-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.project-thumbnail {
  width: 100%;
  height: 250px;
  object-fit: cover;
  background-color: var(--gray-100);
}

.project-content {
  padding: var(--spacing-xl);
}

.project-title {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-md);
}

.project-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-tools {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.project-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.view-project {
  color: var(--primary-green);
  font-weight: var(--font-semibold);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ========== PROJECT MODAL ========== */

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: var(--z-modal-backdrop);
  overflow-y: auto;
  padding: var(--spacing-xl);
}

.modal.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: white;
  border-radius: var(--radius-xl);
  max-width: 1000px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: fadeIn 0.3s ease-out;
}

.modal-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 40px;
  height: 40px;
  background: white;
  border: none;
  border-radius: 50%;
  font-size: var(--text-2xl);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-base);
  transition: all var(--transition-base);
}

.modal-close:hover {
  background-color: var(--gray-100);
  transform: rotate(90deg);
}

.modal-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  background-color: var(--gray-100);
}

.modal-body {
  padding: var(--spacing-3xl);
}

.modal-header {
  margin-bottom: var(--spacing-xl);
}

.modal-title {
  font-size: var(--text-4xl);
  margin-bottom: var(--spacing-lg);
}

.modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.modal-section {
  margin-bottom: var(--spacing-2xl);
}

.modal-section h3 {
  font-size: var(--text-2xl);
  margin-bottom: var(--spacing-md);
  color: var(--primary-green);
}

.modal-section p {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.modal-section ul {
  list-style: none;
  padding-left: 0;
}

.modal-section li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

.modal-section li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary-green);
  font-weight: var(--font-bold);
}

.modal-embed {
  width: 100%;
  height: 600px;
  border: none;
  border-radius: var(--radius-lg);
  margin: var(--spacing-xl) 0;
}

/* ========== SKILLS SECTION ========== */

.skills {
  padding: var(--spacing-5xl) 0;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.skill-category {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.skill-category-title {
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.skill-category-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-green), var(--primary-blue));
  color: white;
  border-radius: var(--radius-md);
  font-size: var(--text-lg);
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.skill-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.skill-name {
  font-weight: var(--font-medium);
  color: var(--text-primary);
}

.skill-level {
  font-size: var(--text-sm);
  color: var(--text-muted);
}

.skill-bar {
  width: 100%;
  height: 8px;
  background-color: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: var(--spacing-xs);
}

.skill-bar-fill {
  height: 100%;
  background: linear-gradient(to right, var(--primary-green), var(--primary-blue));
  border-radius: var(--radius-full);
  transition: width 1s ease-out;
}

/* ========== CONTACT SECTION ========== */

.contact {
  background: linear-gradient(135deg, var(--primary-green), var(--primary-blue));
  color: white;
  padding: var(--spacing-5xl) 0;
  text-align: center;
}

.contact h2 {
  color: white;
  font-size: var(--text-5xl);
  margin-bottom: var(--spacing-lg);
}

.contact p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--text-xl);
  margin-bottom: var(--spacing-3xl);
}

.contact-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-3xl);
}

.contact-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg) var(--spacing-2xl);
  background: white;
  color: var(--primary-green);
  border-radius: var(--radius-lg);
  font-weight: var(--font-semibold);
  font-size: var(--text-lg);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
}

.contact-link:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2xl);
  color: var(--primary-green-dark);
}

/* ========== FOOTER ========== */

.footer {
  background-color: var(--gray-900);
  color: var(--gray-400);
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.footer p {
  color: var(--gray-400);
  margin-bottom: var(--spacing-sm);
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--primary-green);
  font-weight: var(--font-medium);
  margin-top: var(--spacing-lg);
  transition: color var(--transition-fast);
}

.back-to-top:hover {
  color: var(--primary-blue);
}