/* Reset và biến CSS */
:root {
  --primary-color: #4f46e5;
  --secondary-color: #6366f1;
  --accent-color: #818cf8;
  --text-color: #1e293b;
  --light-text: #64748b;
  --background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  --card-bg: rgba(255, 255, 255, 0.95);
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
  --transition: all 0.3s ease;
}

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

body {
  font-family: "Inter", sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background: var(--background);
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
      circle at 0% 0%,
      rgba(79, 70, 229, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 100% 0%,
      rgba(99, 102, 241, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 100% 100%,
      rgba(129, 140, 248, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 0% 100%,
      rgba(79, 70, 229, 0.1) 0%,
      transparent 50%
    );
  z-index: -1;
}

/* Glass effect */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 16px;
  padding: 2rem;
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.2);
  background: var(--card-bg);
}

/* Navigation */
.glass-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  transition: var(--transition);
}

.glass-nav.scrolled {
  background: var(--card-bg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  position: relative;
}

.brand-link {
  text-decoration: none;
  color: var(--text-color);
  font-size: 1.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 12px;
  transition: var(--transition);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}

.brand-link:hover {
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow);
  background: var(--card-bg);
}

.logo-text {
  position: relative;
  background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 800;
  letter-spacing: 1px;
}

.logo-dot {
  width: 10px;
  height: 10px;
  background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
  border-radius: 50%;
  position: relative;
  animation: pulse 2s infinite;
}

.logo-dot::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  background: var(--primary-color);
  border-radius: 50%;
  animation: pulse 2s infinite;
  opacity: 0.5;
}

@keyframes pulse {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.5;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.5);
    opacity: 0;
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.5;
  }
}

.nav-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
  background: transparent;
}

.nav-link::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
  border-radius: 8px;
  opacity: 0;
  transition: var(--transition);
  z-index: -1;
}

.nav-link:hover {
  color: white;
  transform: translateY(-2px);
}

.nav-link:hover::before {
  opacity: 1;
}

/* Hero Section Improvements */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 2rem;
  overflow: hidden;
}

.hero-content {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.greeting {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.greeting-line {
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), transparent);
}

.name {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin: 0;
  color: var(--text-color);
  position: relative;
  white-space: nowrap;
}

.name span {
  display: inline-block;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.5s ease forwards;
}

.name span:nth-child(1) {
  animation-delay: 0.1s;
}
.name span:nth-child(2) {
  animation-delay: 0.2s;
}
.name span:nth-child(3) {
  animation-delay: 0.3s;
}
.name span:nth-child(4) {
  animation-delay: 0.4s;
}
.name span:nth-child(5) {
  animation-delay: 0.5s;
}
.name span:nth-child(6) {
  animation-delay: 0.6s;
}
.name span:nth-child(7) {
  animation-delay: 0.7s;
}
.name span:nth-child(8) {
  animation-delay: 0.8s;
}
.name span:nth-child(9) {
  animation-delay: 0.9s;
}
.name span:nth-child(10) {
  animation-delay: 1s;
}
.name span:nth-child(11) {
  animation-delay: 1.1s;
}
.name span:nth-child(12) {
  animation-delay: 1.2s;
}
.name span:nth-child(13) {
  animation-delay: 1.3s;
}
.name span:nth-child(14) {
  animation-delay: 1.4s;
}

.highlight {
  display: block;
  font-size: 1.8rem;
  color: var(--primary-color);
  margin-top: 0.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.5s ease forwards 1.3s;
}

.tagline {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.5s ease forwards 1.4s;
}

.tagline-line {
  width: 25px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-color), transparent);
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.5s ease forwards 1.5s;
}

.tech-tag {
  padding: 0.4rem 0.8rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

.tech-tag:hover {
  transform: translateY(-2px);
  background: var(--card-bg);
  color: var(--primary-color);
  box-shadow: var(--glass-shadow);
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.5s ease forwards 1.5s;
}

.cta-button {
  padding: 0.8rem 1.8rem;
  border-radius: 30px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  text-align: center;
  font-size: 0.95rem;
}

.cta-button.primary {
  background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
  color: white;
  border: none;
}

.cta-button.secondary {
  background: var(--glass-bg);
  color: var(--text-color);
  border: 1px solid var(--glass-border);
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--glass-shadow);
}

.hero-code {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--glass-shadow);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.5s ease forwards 1.6s;
}

.code-header {
  background: var(--card-bg);
  padding: 1rem;
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--glass-border);
}

.code-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-secondary);
}

.code-dot:nth-child(1) {
  background: #ff5f56;
}
.code-dot:nth-child(2) {
  background: #ffbd2e;
}
.code-dot:nth-child(3) {
  background: #27c93f;
}

.code-content {
  margin: 0;
  padding: 2rem;
  font-family: "Fira Code", monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-color);
  overflow-x: auto;
  background: var(--glass-bg);
}

.code-content code {
  display: block;
}

.code-content .keyword {
  color: #ff79c6;
}

.code-content .string {
  color: #f1fa8c;
}

.code-content .function {
  color: #8be9fd;
}

.code-content .property {
  color: #bd93f9;
}

.code-content .comment {
  color: #6272a4;
}

.code-content .operator {
  color: #ff79c6;
}

.code-content .number {
  color: #bd93f9;
}

.code-content .promise {
  color: #50fa7b;
}

.code-content .object {
  color: #ffb86c;
}

.code-content .emoji {
  color: #ff79c6;
}

.hero-shapes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.shape {
  position: absolute;
  border-radius: 50%;
  background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
  opacity: 0.1;
  filter: blur(40px);
}

.shape-1 {
  width: 300px;
  height: 300px;
  top: 20%;
  left: 10%;
  animation: float 6s ease-in-out infinite;
}

.shape-2 {
  width: 200px;
  height: 200px;
  top: 60%;
  right: 15%;
  animation: float 8s ease-in-out infinite;
}

.shape-3 {
  width: 150px;
  height: 150px;
  bottom: 10%;
  left: 30%;
  animation: float 7s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

  .greeting,
  .tagline {
    justify-content: center;
  }

  .name {
    font-size: 2rem;
    white-space: normal;
  }

  .highlight {
    font-size: 1.5rem;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-code {
    display: none;
  }
}

/* Sections */
.section-padding {
  padding: 6rem 2rem;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 4rem;
  position: relative;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--primary-color);
  border-radius: 2px;
}

/* About Section */
.about-image {
  position: relative;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.about-image img {
  width: 100%;
  height: auto;
  border-radius: 1rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.about-content {
  padding-top: 3rem;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  align-items: center;
}

.profile-image-container {
  position: relative;
}

.profile-image {
  width: 100%;
  border-radius: 16px;
  position: relative;
  z-index: 1;
}

.profile-image-border {
  position: absolute;
  top: -20px;
  left: -20px;
  right: 20px;
  bottom: 20px;
  border: 2px solid var(--primary-color);
  border-radius: 16px;
  z-index: 0;
}

/* Timeline */
.timeline {
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  padding: 2rem 0;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: linear-gradient(
    to bottom,
    var(--primary-color) 0%,
    var(--accent-color) 50%,
    var(--primary-color) 100%
  );
  border-radius: 2px;
  opacity: 0.4;
  box-shadow: 0 0 20px rgba(79, 70, 229, 0.2);
}

.timeline-item {
  margin-bottom: 4rem;
  position: relative;
  width: 50%;
  padding: 0 2rem;
}

.timeline-item:nth-child(odd) {
  left: 0;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-dot {
  width: 24px;
  height: 24px;
  background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
  border-radius: 50%;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  box-shadow: 0 0 0 4px var(--glass-bg), 0 0 20px rgba(79, 70, 229, 0.3);
  transition: var(--transition);
}

.timeline-item:hover .timeline-dot {
  transform: translateX(-50%) scale(1.2);
  box-shadow: 0 0 0 6px var(--glass-bg);
}

.timeline-item:nth-child(odd) .timeline-dot {
  left: 100%;
}

.timeline-item:nth-child(even) .timeline-dot {
  left: 0;
}

.timeline-content {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 16px;
  padding: 2rem;
  position: relative;
  transition: var(--transition);
}

.timeline-content::before {
  content: "";
  position: absolute;
  top: 20px;
  width: 20px;
  height: 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-width: 1px 1px 0 0;
  transform: rotate(45deg);
}

.timeline-item:nth-child(odd) .timeline-content::before {
  right: -10px;
}

.timeline-item:nth-child(even) .timeline-content::before {
  left: -10px;
}

.timeline-item:hover .timeline-content {
  transform: translateY(-5px);
  box-shadow: var(--glass-shadow);
  background: var(--card-bg);
  box-shadow: 0 12px 40px rgba(79, 70, 229, 0.15);
}

.timeline-date {
  color: var(--primary-color);
  font-weight: 600;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.timeline-company {
  color: var(--text-color);
  font-weight: 500;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.timeline-details {
  list-style: none;
  padding: 0;
}

.timeline-details li {
  margin-bottom: 0.75rem;
  position: relative;
  padding-left: 1.5rem;
  color: var(--light-text);
}

.timeline-details li::before {
  content: "•";
  color: var(--primary-color);
  position: absolute;
  left: 0;
  font-size: 1.2rem;
}

/* Skills Grid */
.skills-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.skill-item {
  text-align: center;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.skill-item:hover {
  background: var(--card-bg);
  box-shadow: 0 12px 40px rgba(79, 70, 229, 0.15);
}

.skill-icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.skill-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--glass-bg);
  border-radius: 20px;
  font-size: 0.875rem;
  margin: 0.25rem;
  color: var(--primary-color);
}

.skill-bar {
  height: 8px;
  background: var(--glass-bg);
  border-radius: 4px;
  margin-top: 1rem;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: 4px;
  transition: width 1s ease-in-out;
  box-shadow: 0 0 20px rgba(79, 70, 229, 0.2);
}

/* Contact Section */
.contact {
  padding: 6rem 2rem;
  background: var(--bg-color);
}

.contact-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  padding: 2rem 0;
}

.contact-info,
.social-links {
  padding: 2rem;
  border-radius: 1rem;
  transition: all 0.3s ease;
}

.contact-info:hover,
.social-links:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.contact-header,
.social-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--accent-color);
}

.contact-header i,
.social-header i {
  font-size: 1.5rem;
  color: var(--accent-color);
}

.contact-header h3,
.social-header h3 {
  font-size: 1.5rem;
  color: var(--text-color);
  font-weight: 600;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-icon {
  width: 45px;
  height: 45px;
  background: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--bg-color);
  transition: all 0.3s ease;
}

.contact-item:hover .contact-icon {
  transform: scale(1.1);
  box-shadow: 0 0 15px var(--accent-color);
}

.contact-details h4 {
  font-size: 1.1rem;
  color: var(--text-color);
  margin-bottom: 0.3rem;
  font-weight: 600;
}

.contact-details p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.social-icons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.social-icon {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 0.5rem;
  color: var(--text-color);
  text-decoration: none;
  transition: all 0.3s ease;
}

.social-icon i {
  font-size: 1.5rem;
  color: var(--accent-color);
  transition: all 0.3s ease;
}

.social-icon span {
  font-size: 1.1rem;
  font-weight: 500;
}

.social-icon:hover {
  background: var(--accent-color);
  transform: translateX(10px);
}

.social-icon:hover i,
.social-icon:hover span {
  color: var(--bg-color);
}

@media (max-width: 768px) {
  .contact {
    padding: 4rem 1rem;
  }

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

  .contact-info,
  .social-links {
    padding: 1.5rem;
  }

  .contact-header h3,
  .social-header h3 {
    font-size: 1.3rem;
  }

  .contact-icon {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .contact-details h4 {
    font-size: 1rem;
  }

  .contact-details p {
    font-size: 0.9rem;
  }

  .social-icon {
    padding: 0.8rem;
  }

  .social-icon i {
    font-size: 1.3rem;
  }

  .social-icon span {
    font-size: 1rem;
  }
}

/* Footer */
.footer {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 1.5rem;
  margin-top: 4rem;
  text-align: center;
}

.footer p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .footer {
    padding: 1rem;
  }
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--text-color);
  margin: 5px 0;
  transition: var(--transition);
  border-radius: 2px;
}

.menu-toggle:hover span {
  background: var(--primary-color);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
  background: var(--primary-color);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
  background: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 2rem;
    flex-direction: column;
    align-items: center;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border-bottom: 1px solid var(--glass-border);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    width: 100%;
    text-align: center;
    padding: 1rem;
  }

  .nav-link::before {
    height: 100%;
  }

  .brand-link {
    font-size: 1.5rem;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-title {
    font-size: 3rem;
  }

  .greeting {
    font-size: 1.5rem;
  }

  .name {
    font-size: 2.5rem;
  }

  .tagline {
    font-size: 1.2rem;
  }

  .tech-stack {
    justify-content: center;
  }

  .cta-buttons {
    justify-content: center;
  }

  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .profile-image-container {
    max-width: 300px;
    margin: 0 auto;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 50px;
    padding-right: 0;
  }

  .timeline-item:nth-child(even) {
    left: 0;
  }

  .timeline-dot {
    left: 20px !important;
  }

  .timeline-content::before {
    left: -10px !important;
    right: auto !important;
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Projects Section */
.projects {
  padding: 6rem 2rem;
  background: var(--bg-color);
  position: relative;
  overflow: hidden;
}

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

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.project-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--glass-shadow);
}

.project-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.project-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.project-card:hover .project-overlay {
  opacity: 1;
}

.project-links {
  display: flex;
  gap: 1rem;
}

.project-link {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  background: var(--glass-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-color);
  text-decoration: none;
  transition: var(--transition);
  opacity: 0;
  transform: translateY(20px);
  font-size: 1.2rem;
}

.project-card:hover .project-link {
  opacity: 1;
  transform: translateY(0);
}

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

.project-content {
  padding: 1.5rem;
}

.project-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: 0.8rem;
}

.project-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1rem;
}

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

.project-tech .tech-tag {
  font-size: 0.8rem;
  padding: 0.3rem 0.8rem;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 15px;
  color: var(--text-secondary);
  transition: var(--transition);
}

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

@media (max-width: 768px) {
  .projects {
    padding: 4rem 1rem;
  }

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

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .project-card {
    max-width: 500px;
    margin: 0 auto;
  }
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0.8rem 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo i {
  color: var(--accent-color);
  font-size: 1.8rem;
}

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

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 1rem;
  transition: all 0.3s ease;
  position: relative;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: width 0.3s ease;
}

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

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

@media (max-width: 768px) {
  .header {
    padding: 0.6rem 1rem;
  }

  .logo {
    font-size: 1.3rem;
  }

  .logo i {
    font-size: 1.5rem;
  }

  .nav-links {
    gap: 1.5rem;
  }

  .nav-link {
    font-size: 0.9rem;
  }
}