/* Modern Portfolio CSS */
:root {
  --primary-color: #0f3460;
  --secondary-color: #00d4ff;
  --accent-color: #e94560;
  --background-color: #ffffff;
  --text-color: #1a1a2e;
  --light-gray: #f5f5f5;
  --medium-gray: #e0e0e0;
  --dark-gray: #666666;
  --border-radius: 12px;
  --box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-color);
  background-color: var(--background-color);
  line-height: 1.6;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background-color: rgba(15, 52, 96, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 1rem 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary-color);
  text-decoration: none;
}

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

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-left: 1rem;
}

.lang-btn {
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  transition: var(--transition);
}

.lang-btn:hover {
  border-color: var(--secondary-color);
}

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

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

.nav-link:after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--secondary-color);
  transition: var(--transition);
}

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

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, #1a5f7a 100%);
  color: white;
  padding: 150px 20px 100px;
  text-align: center;
  margin-top: 60px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(233, 69, 96, 0.1) 0%, transparent 50%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 1rem;
  animation: slideInDown 0.6s ease;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--secondary-color);
  animation: slideInUp 0.6s ease 0.2s backwards;
}

.hero-description {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  animation: slideInUp 0.6s ease 0.4s backwards;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: slideInUp 0.6s ease 0.6s backwards;
}

.btn {
  padding: 12px 30px;
  font-size: 1rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

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

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 212, 255, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: white;
  border: 2px solid white;
}

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

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

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

/* Sections */
.section {
  padding: 80px 20px;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 3rem;
  text-align: center;
  position: relative;
  display: inline-block;
  width: 100%;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(to right, var(--secondary-color), var(--accent-color));
  border-radius: 2px;
}

/* About Section */
.about {
  background-color: var(--light-gray);
}

.about-text {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.about-text p {
  margin-bottom: 1.5rem;
  color: var(--dark-gray);
}

.about-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.info-item {
  background: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.info-label {
  display: block;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 0.5rem;
}

.info-value {
  display: block;
  color: var(--dark-gray);
}

/* Skills Section */
.skills {
  background-color: white;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.skill-category {
  background: linear-gradient(135deg, var(--primary-color) 0%, #1a5f7a 100%);
  color: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.skill-category:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.2);
}

.skill-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--secondary-color);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.skill-tag {
  display: inline-block;
  background-color: rgba(255, 255, 255, 0.2);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  transition: var(--transition);
}

.skill-tag:hover {
  background-color: var(--secondary-color);
  color: var(--primary-color);
  border-color: var(--secondary-color);
}

/* Experience Section */
.experience {
  background-color: var(--light-gray);
}

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

.experience-timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--secondary-color), var(--accent-color));
  border-radius: 2px;
}

.experience-item {
  margin-bottom: 3rem;
  padding-left: 3rem;
  position: relative;
}

.experience-item::before {
  content: '';
  position: absolute;
  left: -9px;
  top: 0;
  width: 18px;
  height: 18px;
  background-color: var(--secondary-color);
  border: 3px solid white;
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--primary-color);
}

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
  gap: 1rem;
}

.experience-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--primary-color);
  margin: 0;
}

.experience-company {
  background-color: var(--primary-color);
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  font-size: 0.9rem;
}

.experience-date {
  font-size: 0.95rem;
  color: var(--dark-gray);
  margin-bottom: 1rem;
}

.experience-description {
  list-style: none;
}

.experience-description li {
  padding: 0.5rem 0;
  color: var(--dark-gray);
  padding-left: 1.5rem;
  position: relative;
}

.experience-description li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--secondary-color);
  font-weight: bold;
}

/* Projects Section */
.projects {
  background-color: white;
}

.featured-project {
  display: grid;
  grid-template-columns: 1.2fr 0.95fr;
  gap: 2rem;
  margin-top: 3rem;
  margin-bottom: 2.5rem;
  padding: 2rem;
  border-radius: 24px;
  background: linear-gradient(135deg, #0f3460 0%, #1a5f7a 50%, #00a8cc 100%);
  color: white;
  box-shadow: 0 20px 50px rgba(15, 52, 96, 0.25);
  overflow: hidden;
  position: relative;
}

.featured-project::before {
  content: '';
  position: absolute;
  inset: auto -10% -35% auto;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.28) 0%, rgba(255, 255, 255, 0) 70%);
  animation: featuredPulse 4s ease-in-out infinite;
}

.featured-project::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -8%;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: featuredFloat 6s ease-in-out infinite;
}

.featured-project-copy,
.featured-project-panel {
  position: relative;
  z-index: 1;
}

.featured-badge {
  display: inline-block;
  padding: 0.45rem 0.9rem;
  margin-bottom: 1rem;
  border-radius: 999px;
  background-color: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.24);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.featured-title {
  font-size: 2.8rem;
  margin-bottom: 0.5rem;
}

.featured-subtitle {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 1.25rem;
}

.featured-description {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 1rem;
}

.featured-actions {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
}

.featured-logo {
  width: 88px;
  height: 88px;
  object-fit: contain;
  padding: 0.6rem;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.featured-link {
  color: white;
}

.featured-project-panel {
  display: grid;
  gap: 1rem;
}

.featured-highlights {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
}

.featured-mini-card,
.featured-flow {
  padding: 1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(8px);
}

.featured-mini-card strong,
.featured-flow h4 {
  display: block;
  margin-bottom: 0.45rem;
}

.featured-mini-card p,
.featured-flow p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.92rem;
  line-height: 1.6;
}

.featured-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.featured-tech-overview h4 {
  margin-bottom: 0.75rem;
  font-size: 1rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.92);
}

.featured-stack .tech-tag {
  background-color: rgba(255, 255, 255, 0.14);
  color: white;
  border-color: rgba(255, 255, 255, 0.2);
}

.featured-stack .tech-tag:hover {
  background-color: white;
  color: var(--primary-color);
}

.featured-quote {
  font-size: 1.15rem;
  font-weight: 600;
  color: #ffffff;
  text-align: left;
}

.projects-subheading {
  margin-bottom: 1.25rem;
  color: var(--primary-color);
  font-size: 1.35rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

@keyframes featuredFloat {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(18px);
  }
}

@keyframes featuredPulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.75;
  }
  50% {
    transform: scale(1.12);
    opacity: 1;
  }
}

.project-card {
  background: white;
  border: 1px solid var(--medium-gray);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  transition: var(--transition);
  box-shadow: var(--box-shadow);
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0, 212, 255, 0.15);
  border-color: var(--secondary-color);
}

.project-header {
  margin-bottom: 1rem;
}

.project-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--primary-color);
  margin: 0 0 0.3rem 0;
}

.project-subtitle {
  font-size: 0.9rem;
  color: var(--secondary-color);
  margin: 0;
}

.project-description {
  color: var(--dark-gray);
  font-size: 0.95rem;
  margin: 1rem 0;
  line-height: 1.6;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.2rem 0;
}

.tech-tag {
  display: inline-block;
  background-color: var(--light-gray);
  color: var(--primary-color);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
  border: 1px solid var(--secondary-color);
  transition: var(--transition);
}

.tech-tag:hover {
  background-color: var(--secondary-color);
  color: white;
  border-color: var(--secondary-color);
}

.project-link {
  display: inline-block;
  color: var(--secondary-color);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  margin-top: 1rem;
}

.project-link:hover {
  color: var(--accent-color);
  transform: translateX(5px);
}

/* Contact Section */
.contact {
  background: linear-gradient(135deg, var(--primary-color) 0%, #1a5f7a 100%);
  color: white;
  text-align: center;
}

.contact-subtitle {
  font-size: 1.2rem;
  margin-bottom: 3rem;
  opacity: 0.9;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
  margin-top: 2rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  text-align: left;
}

.contact-item h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--secondary-color);
}

.contact-item a {
  color: white;
  text-decoration: none;
  transition: var(--transition);
}

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

.contact-item p {
  color: white;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.social-link {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: var(--transition);
  border: 2px solid transparent;
}

.social-link:hover {
  background-color: var(--secondary-color);
  color: var(--primary-color);
  transform: translateY(-5px);
}

.social-link svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* Footer */
.footer {
  background-color: #0a1f36;
  color: white;
  text-align: center;
  padding: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .featured-project {
    grid-template-columns: 1fr;
    padding: 1.5rem;
  }

  .featured-highlights {
    grid-template-columns: 1fr;
  }

  .featured-title {
    font-size: 2.2rem;
  }

  .featured-actions {
    flex-wrap: wrap;
  }

  .nav-menu {
    width: 100%;
    flex-wrap: wrap;
    row-gap: 0.6rem;
    gap: 1rem;
    font-size: 0.9rem;
  }

  .lang-switch {
    margin-left: 0;
    align-self: flex-end;
  }

  .hero {
    margin-top: 110px;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .hero-buttons {
    gap: 1rem;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .experience-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-content {
    grid-template-columns: 1fr;
  }

  .contact-info {
    text-align: center;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .nav-logo {
    font-size: 1.2rem;
  }

  .nav-menu {
    gap: 0.5rem;
    font-size: 0.8rem;
  }

  .lang-switch {
    width: auto;
    justify-content: flex-start;
    margin-top: 0.5rem;
    align-self: flex-start;
  }

  .hero {
    padding: 100px 20px 60px;
    margin-top: 125px;
  }

  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 0.9rem;
  }

  .hero-description {
    font-size: 0.9rem;
  }

  .section {
    padding: 50px 15px;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .experience-timeline::before {
    left: -5px;
  }

  .experience-item {
    padding-left: 1.5rem;
  }

  .experience-item::before {
    left: -11px;
  }
}