/* CSS Variables for consistent theming */
:root {
  --primary-color: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --secondary-color: #64748b;
  --accent-color: #f59e0b;
  --success-color: #10b981;
  --background-color: #ffffff;
  --background-alt: #f8fafc;
  --text-color: #1e293b;
  --text-light: #64748b;
  --text-dark: #0f172a;
  --border-color: #e2e8f0;
  --shadow-light: rgba(0, 0, 0, 0.05);
  --shadow-medium: rgba(0, 0, 0, 0.1);
  --shadow-heavy: rgba(0, 0, 0, 0.15);
  --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent-color) 0%, #f97316 100%);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --border-radius: 12px;
  --border-radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
  overflow-x: hidden;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-dark);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
  margin-bottom: 1rem;
  color: var(--text-light);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.nav-brand h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 0;
}

.nav-subtitle {
  font-size: 0.875rem;
  color: var(--text-light);
  font-weight: 400;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition);
}

.nav-link:hover::after {
  width: 100%;
}

/* Mobile Navigation */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--text-color);
  transition: var(--transition);
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  padding-top: 80px;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-greeting {
  display: block;
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.hero-name {
  display: block;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

.hero-subtitle {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--accent-color);
  margin: 1rem 0 2rem 0;
  min-height: 2rem;
}

.typewriter {
  border-right: 2px solid var(--accent-color);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { border-color: var(--accent-color); }
  51%, 100% { border-color: transparent; }
}

.hero-description {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: 2rem;
  color: var(--text-color);
}

.hero-stats {
  display: flex;
  gap: 2rem;
  margin: 2rem 0;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-label {
  display: block;
  font-size: 0.875rem;
  color: var(--text-light);
  font-weight: 500;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card {
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 20px 40px var(--shadow-medium);
  text-align: center;
  transform: perspective(1000px) rotateY(-5deg);
  transition: var(--transition);
}

.hero-card:hover {
  transform: perspective(1000px) rotateY(0deg) translateY(-10px);
  box-shadow: 0 30px 60px var(--shadow-heavy);
}

.card-icon {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.hero-scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
}

.hero-scroll a {
  color: var(--text-light);
  font-size: 1.5rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
  background: white;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-alt {
  background: var(--background-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
  transform: translateX(-50%);
}

.timeline-item {
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.timeline-item.animate {
  opacity: 1;
  transform: translateY(0);
}

.timeline-content {
  position: relative;
  display: flex;
  align-items: center;
}

.timeline-marker {
  width: 16px;
  height: 16px;
  background: var(--primary-color);
  border-radius: 50%;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  border: 4px solid white;
  box-shadow: 0 0 0 4px var(--border-color);
}

.timeline-card {
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 10px 30px var(--shadow-light);
  width: calc(50% - 2rem);
  transition: var(--transition);
}

.timeline-item:nth-child(odd) .timeline-card {
  margin-right: auto;
  margin-left: calc(50% + 2rem);
}

.timeline-item:nth-child(even) .timeline-card {
  margin-left: auto;
  margin-right: calc(50% + 2rem);
}

.timeline-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px var(--shadow-medium);
}

.timeline-year {
  display: inline-block;
  background: var(--gradient-accent);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

/* Experience Cards */
.experience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.experience-card {
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 10px 30px var(--shadow-light);
  transition: var(--transition);
  opacity: 0;
  transform: translateY(30px);
}

.experience-card.animate {
  opacity: 1;
  transform: translateY(0);
}

.experience-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 30px 60px var(--shadow-medium);
}

.card-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.card-header .card-icon {
  font-size: 2rem;
  color: var(--primary-color);
  margin-top: 0.25rem;
}

.period {
  display: block;
  color: var(--accent-color);
  font-weight: 600;
  font-size: 0.875rem;
}

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.skill-tag {
  background: var(--background-alt);
  color: var(--primary-color);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Awards Section Styling */
.awards-section {
  margin: 1.5rem 0;
  padding: 1.5rem;
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border-radius: var(--border-radius);
  border-left: 3px solid var(--accent-color);
}

.awards-section h5 {
  color: var(--text-dark);
  margin-bottom: 1rem;
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.awards-section h5::before {
  content: "🏆";
  font-size: 1.2rem;
}

.award-items {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.award-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.8);
  border-radius: var(--border-radius);
  transition: var(--transition);
}

.award-item:hover {
  background: rgba(255, 255, 255, 1);
  transform: translateX(5px);
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.2);
}

.award-item i {
  color: var(--accent-color);
  font-size: 1.25rem;
  min-width: 20px;
}

.award-item span {
  color: var(--text-dark);
  font-size: 0.95rem;
  line-height: 1.4;
}

.award-item strong {
  color: var(--accent-color);
  font-weight: 600;
}

/* Speaking Section */
.speaking-section {
  background: white;
  padding: 3rem;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 10px 30px var(--shadow-light);
  margin-top: 3rem;
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.speaking-section.animate {
  opacity: 1;
  transform: translateY(0);
}

.speaking-intro {
  font-size: 1.125rem;
  margin-bottom: 2rem;
}

.speaking-highlights {
  display: grid;
  gap: 1rem;
}

.speaking-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--background-alt);
  border-radius: var(--border-radius);
}

.speaking-item i {
  color: var(--accent-color);
  font-size: 1.25rem;
}

/* Research Section */
.research-overview {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-bottom: 4rem;
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.research-overview.animate {
  opacity: 1;
  transform: translateY(0);
}

.research-stat {
  text-align: center;
}

.publications {
  display: grid;
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.publication-card {
  display: flex;
  gap: 2rem;
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: 0 5px 20px var(--shadow-light);
  transition: var(--transition);
  opacity: 0;
  transform: translateX(-30px);
}

.publication-card.animate {
  opacity: 1;
  transform: translateX(0);
}

.publication-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px var(--shadow-medium);
}

.pub-year {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  min-width: 80px;
  text-align: center;
  padding: 1rem 0;
  background: var(--background-alt);
  border-radius: var(--border-radius);
}

.pub-content h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.pub-journal {
  color: var(--accent-color);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pub-description {
  margin-bottom: 1rem;
}

.pub-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.pub-link:hover {
  color: var(--primary-dark);
}

.view-more-pubs {
  text-align: center;
  margin-top: 3rem;
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.view-more-pubs.animate {
  opacity: 1;
  transform: translateY(0);
}

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 800px;
  margin: 0 auto;
}

.contact-info {
  opacity: 0;
  transform: translateX(-30px);
  transition: var(--transition);
}

.contact-info.animate {
  opacity: 1;
  transform: translateX(0);
}

.services-list {
  list-style: none;
}

.services-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
}

.services-list i {
  color: var(--success-color);
  font-size: 1.25rem;
}

.social-links {
  opacity: 0;
  transform: translateX(30px);
  transition: var(--transition);
}

.social-links.animate {
  opacity: 1;
  transform: translateX(0);
}

.social-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: white;
  border-radius: var(--border-radius);
  text-decoration: none;
  color: var(--text-color);
  box-shadow: 0 5px 15px var(--shadow-light);
  transition: var(--transition);
}

.social-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px var(--shadow-medium);
}

.social-link.linkedin:hover { color: #0077b5; }
.social-link.github:hover { color: #333; }
.social-link.orcid:hover { color: #a6ce39; }
.social-link.scholar:hover { color: #4285f4; }

.social-link i {
  font-size: 1.5rem;
}

/* Footer */
.footer {
  background: var(--text-dark);
  color: white;
  padding: 2rem 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.footer-text p {
  color: #94a3b8;
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
}

/* Entrepreneurship/Ventures Section */
.ventures-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
}

.venture-card {
  background: white;
  padding: 2.5rem;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 10px 30px var(--shadow-light);
  transition: var(--transition);
  opacity: 0;
  transform: translateY(30px);
  border-left: 4px solid var(--primary-color);
}

.venture-card.animate {
  opacity: 1;
  transform: translateY(0);
}

.venture-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 30px 60px var(--shadow-medium);
  border-left-color: var(--accent-color);
}

.venture-header {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.venture-header .card-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-top: 0.25rem;
}

.venture-type {
  display: block;
  color: var(--accent-color);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 0.5rem;
}

.venture-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.feature-tag {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
  transition: var(--transition);
}

.feature-tag:hover {
  transform: scale(1.05);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

/* Enhanced Experience Cards with AI Projects */
.ai-projects {
  margin: 1.5rem 0;
  padding: 1.5rem;
  background: var(--background-alt);
  border-radius: var(--border-radius);
  border-left: 3px solid var(--accent-color);
}

.ai-projects h5 {
  color: var(--text-dark);
  margin-bottom: 1rem;
  font-size: 1.1rem;
  font-weight: 600;
}

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

.project-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0;
  color: var(--text-color);
  font-size: 0.95rem;
  line-height: 1.5;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

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

.project-list i {
  color: var(--primary-color);
  font-size: 1rem;
  min-width: 16px;
}

/* Timeline enhancements */
.timeline-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 1rem;
  transition: var(--transition);
}

.timeline-link:hover {
  color: var(--primary-dark);
  transform: translateX(5px);
}

.timeline-link i {
  font-size: 0.8rem;
}

/* Skillset Section */
.skillset-content {
  max-width: 1000px;
  margin: 0 auto;
}

.skills-grid {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 4rem;
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.skills-grid.animate {
  opacity: 1;
  transform: translateY(0);
}

.skill-category {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: 1.5rem;
}

.skill-item {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 2rem;
  background: white;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 5px 20px var(--shadow-light);
  transition: var(--transition);
  border-left: 4px solid transparent;
}

.skill-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px var(--shadow-medium);
  border-left-color: var(--primary-color);
}

.skill-icon {
  font-size: 2rem;
  color: var(--primary-color);
  min-width: 2.5rem;
  margin-top: 0.25rem;
  transition: var(--transition);
}

.skill-item:hover .skill-icon {
  color: var(--accent-color);
  transform: scale(1.1);
}

.skill-content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.skill-content p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.5;
  margin: 0;
}

/* Languages Section */
.languages-section {
  background: white;
  padding: 3rem;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 10px 30px var(--shadow-light);
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
  border-top: 4px solid var(--accent-color);
}

.languages-section.animate {
  opacity: 1;
  transform: translateY(0);
}

.languages-section h3 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--text-dark);
  font-size: 1.75rem;
  position: relative;
}

.languages-section h3::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

.languages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.language-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
  background: var(--background-alt);
  border-radius: var(--border-radius);
  transition: var(--transition);
  text-align: center;
}

.language-item:hover {
  background: white;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--shadow-light);
}

.language-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.language-flag {
  font-size: 2rem;
  color: var(--primary-color);
}

.language-header h4 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-dark);
  margin: 0;
}

.language-level {
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.language-level.native {
  background: linear-gradient(135deg, var(--success-color), #059669);
  color: white;
}

.language-level.professional {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  color: white;
}

.language-level.advanced {
  background: linear-gradient(135deg, var(--accent-color), #f97316);
  color: white;
}

.language-level.basic {
  background: linear-gradient(135deg, var(--secondary-color), #475569);
  color: white;
}

/* Responsive Design for Skillset */
@media (max-width: 1024px) {
  .skill-category {
    grid-template-columns: 1fr;
  }
  
  .languages-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  }
}

@media (max-width: 768px) {
  .skill-item {
    flex-direction: column;
    text-align: center;
    padding: 1.5rem;
  }
  
  .skill-icon {
    margin-top: 0;
  }
  
  .languages-section {
    padding: 2rem;
  }
  
  .languages-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .language-item {
    padding: 1.25rem;
  }
}

@media (max-width: 480px) {
  .skill-item {
    padding: 1.25rem;
  }
  
  .skill-content h4 {
    font-size: 1rem;
  }
  
  .skill-content p {
    font-size: 0.9rem;
  }
  
  .languages-section {
    padding: 1.5rem;
  }
}

/* Animation delays for skill items */
.skill-item:nth-child(1) { transition-delay: 0.05s; }
.skill-item:nth-child(2) { transition-delay: 0.1s; }
.skill-item:nth-child(3) { transition-delay: 0.15s; }
.skill-item:nth-child(4) { transition-delay: 0.2s; }
.skill-item:nth-child(5) { transition-delay: 0.25s; }
.skill-item:nth-child(6) { transition-delay: 0.3s; }
.skill-item:nth-child(7) { transition-delay: 0.35s; }
.skill-item:nth-child(8) { transition-delay: 0.4s; }
.skill-item:nth-child(9) { transition-delay: 0.45s; }
.skill-item:nth-child(10) { transition-delay: 0.5s; }
.skill-item:nth-child(11) { transition-delay: 0.55s; }
.skill-item:nth-child(12) { transition-delay: 0.6s; }
.skill-item:nth-child(13) { transition-delay: 0.65s; }
.skill-item:nth-child(14) { transition-delay: 0.7s; }

/* Language items animation delays */
.language-item:nth-child(1) { transition-delay: 0.1s; }
.language-item:nth-child(2) { transition-delay: 0.2s; }
.language-item:nth-child(3) { transition-delay: 0.3s; }
.language-item:nth-child(4) { transition-delay: 0.4s; }

/* Alternative flag icons using CSS */
.fas.fa-flag-spain::before { content: "🇪🇸"; font-family: "Apple Color Emoji", "Segoe UI Emoji"; }
.fas.fa-flag-usa::before { content: "🇺🇸"; font-family: "Apple Color Emoji", "Segoe UI Emoji"; }
.fas.fa-flag-italy::before { content: "🇮🇹"; font-family: "Apple Color Emoji", "Segoe UI Emoji"; }
.fas.fa-flag-germany::before { content: "🇩🇪"; font-family: "Apple Color Emoji", "Segoe UI Emoji"; }

/* Print styles */
@media print {
  .navbar,
  .hero-scroll,
  .btn {
    display: none;
  }
  
  .section {
    padding: 2rem 0;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.4;
  }
}

/* Chatbot Styles */
.chatbot-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  font-family: var(--font-family);
}

.chatbot-toggle {
  display: flex;
  align-items: center;
  background: var(--gradient-primary);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: 50px;
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.3);
  cursor: pointer;
  transition: var(--transition);
  max-width: 280px;
  position: relative;
}

.chatbot-toggle:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 35px rgba(37, 99, 235, 0.4);
}

.chatbot-toggle.expanded {
  border-radius: 20px 20px 0 0;
  max-width: none;
  width: 350px;
}

.chatbot-icon {
  font-size: 1.5rem;
  margin-right: 1rem;
  animation: pulse 2s infinite;
}

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

.chatbot-text {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.chatbot-title {
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.2rem;
}

.chatbot-subtitle {
  font-size: 0.85rem;
  opacity: 0.9;
}

.chatbot-close-icon {
  margin-left: 1rem;
  font-size: 1.2rem;
  opacity: 0;
  transition: var(--transition);
  cursor: pointer;
}

.chatbot-toggle.expanded .chatbot-close-icon {
  opacity: 1;
}

.chatbot-close-icon:hover {
  transform: rotate(90deg);
}

.chatbot-window {
  width: 350px;
  height: 500px;
  background: white;
  border-radius: 0 0 20px 20px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
  display: none;
  flex-direction: column;
  overflow: hidden;
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chatbot-window.open {
  display: flex;
}

.chatbot-header {
  background: var(--gradient-primary);
  color: white;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.chatbot-avatar {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.chatbot-info {
  flex: 1;
}

.chatbot-info h4 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.chatbot-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  opacity: 0.9;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: #10b981;
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.chatbot-minimize {
  background: none;
  border: none;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: var(--transition);
}

.chatbot-minimize:hover {
  background: rgba(255, 255, 255, 0.1);
}

.chatbot-messages {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: #f8fafc;
}

.chatbot-messages::-webkit-scrollbar {
  width: 4px;
}

.chatbot-messages::-webkit-scrollbar-track {
  background: #f1f1f1;
}

.chatbot-messages::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

.message {
  display: flex;
  gap: 0.75rem;
  animation: fadeInUp 0.3s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.user-message {
  flex-direction: row-reverse;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
  margin-top: 0.5rem;
}

.bot-message .message-avatar {
  background: var(--primary-color);
  color: white;
}

.user-message .message-avatar {
  background: var(--accent-color);
  color: white;
}

.message-content {
  max-width: 80%;
  position: relative;
}

.bot-message .message-content {
  background: white;
  padding: 0.75rem 1rem;
  border-radius: 0 18px 18px 18px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.user-message .message-content {
  background: var(--primary-color);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 18px 0 18px 18px;
}

.message-content p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.4;
  color: inherit;
}

.message-time {
  font-size: 0.75rem;
  opacity: 0.7;
  margin-top: 0.5rem;
  display: block;
}

.quick-questions {
  margin-top: 1rem;
  padding: 1rem;
  background: white;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
}

.quick-questions-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dark);
  margin: 0 0 0.75rem 0;
}

.quick-question-btn {
  display: block;
  width: 100%;
  background: var(--background-alt);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  font-size: 0.85rem;
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 0.5rem;
}

.quick-question-btn:last-child {
  margin-bottom: 0;
}

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

.chatbot-input-container {
  background: white;
  border-top: 1px solid var(--border-color);
  position: relative;
}

.chatbot-typing {
  padding: 0.75rem 1rem;
  background: #f8fafc;
  border-top: 1px solid #e2e8f0;
  display: none;
  align-items: center;
  gap: 0.75rem;
}

.chatbot-typing.show {
  display: flex;
}

.typing-indicator {
  display: flex;
  gap: 4px;
}

.typing-indicator span {
  width: 6px;
  height: 6px;
  background: var(--primary-color);
  border-radius: 50%;
  animation: typing 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

@keyframes typing {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

.typing-text {
  font-size: 0.85rem;
  color: var(--text-light);
  font-style: italic;
}

.chatbot-input-area {
  padding: 1rem;
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

#chatbot-input {
  flex: 1;
  border: 1px solid var(--border-color);
  border-radius: 25px;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
  background: var(--background-alt);
}

#chatbot-input:focus {
  border-color: var(--primary-color);
  background: white;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

#chatbot-send {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

#chatbot-send:disabled {
  background: var(--border-color);
  cursor: not-allowed;
}

#chatbot-send:not(:disabled):hover {
  background: var(--primary-dark);
  transform: scale(1.05);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .chatbot-container {
    bottom: 1rem;
    right: 1rem;
    left: 1rem;
  }
  
  .chatbot-toggle {
    max-width: none;
    width: 100%;
  }
  
  .chatbot-toggle.expanded {
    width: 100%;
  }
  
  .chatbot-window {
    width: 100%;
    height: 400px;
  }
  
  .chatbot-messages {
    padding: 0.75rem;
  }
  
  .message-content {
    max-width: 85%;
  }
}

@media (max-width: 480px) {
  .chatbot-window {
    height: 350px;
  }
  
  .chatbot-input-area {
    padding: 0.75rem;
  }
  
  .quick-questions {
    padding: 0.75rem;
  }
}