:root {
  --bg-color: #0a0a0f;
  --text-color: #ffffff;
  --text-secondary: #8b8b9a;
  --accent-primary: #6366f1;
  --accent-secondary: #818cf8;
  --section-bg: #111118;
  --card-bg: #151520;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Space Grotesk', sans-serif;
  --nav-height: 70px;
  --max-width: 1200px;
  --border-color: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 {
  font-size: clamp(36px, 5vw, 64px);
  margin-bottom: 24px;
}

h2 {
  font-size: clamp(28px, 4vw, 42px);
  margin-bottom: 16px;
}

h3 {
  font-size: clamp(24px, 3vw, 32px);
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
}

.nav-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 18px;
  color: #fff;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: #fff;
}

.lang-switcher {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-body);
}

.lang-switcher:hover {
  border-color: var(--accent-primary);
  color: #fff;
  background: rgba(99, 102, 241, 0.1);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  padding-bottom: 80px;
  position: relative;
}

.hero-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.hero-greeting {
  font-size: 16px;
  color: var(--accent-primary);
  margin-bottom: 16px;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 600;
  margin-bottom: 24px;
  color: #fff;
  max-width: 800px;
}

.hero-subtitle {
  font-size: clamp(18px, 2vw, 22px);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 40px;
  font-weight: 400;
}

.hero-cta {
  display: inline-block;
  color: var(--accent-primary);
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.hero-cta:hover {
  color: var(--accent-secondary);
}

/* Projects Section */
.projects-section {
  padding: 120px 0;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.section-header {
  padding: 0 24px;
  margin-bottom: 60px;
  text-align: center;
}

.section-title {
  font-size: clamp(32px, 4vw, 48px);
  margin-bottom: 16px;
  color: #fff;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(500px, 100%), 1fr));
  gap: 32px;
  padding: 0 24px;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.project-card:hover {
  border-color: rgba(99, 102, 241, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.project-category {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.project-status {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.project-status.live {
  background: rgba(34, 197, 94, 0.15);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.project-status.coming-soon {
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.project-name {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 16px;
  color: #fff;
  font-family: var(--font-heading);
}

.project-description {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.tech-tag {
  font-size: 13px;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-secondary);
  font-weight: 500;
}

.project-actions {
  margin-top: 24px;
}

.project-link {
  color: var(--accent-primary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color 0.2s ease;
}

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

/* Footer */
footer {
  background: var(--section-bg);
  border-top: 1px solid var(--border-color);
  padding: 80px 0 40px;
  margin-top: 120px;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.footer-main {
  margin-bottom: 60px;
}

.footer-main h3 {
  font-size: 28px;
  margin-bottom: 16px;
  color: #fff;
}

.footer-description {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 500px;
  margin-bottom: 24px;
}

.contact-email {
  display: inline-block;
  color: var(--accent-primary);
  text-decoration: none;
  font-size: 18px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.contact-email:hover {
  color: var(--accent-secondary);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 40px;
  margin-bottom: 60px;
}

.footer-column h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-family: var(--font-heading);
}

.footer-column a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  margin-bottom: 12px;
  transition: color 0.2s ease;
}

.footer-column a:hover {
  color: #fff;
}

.copyright {
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
}

/* Preloader */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-color);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 0.5s ease;
}

.loader {
  width: 40px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  border-top-color: var(--accent-primary);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.preloader.fade-out {
  opacity: 0;
  pointer-events: none;
}

/* Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.2, 0, 0.2, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.25);
}

::selection {
  background: rgba(99, 102, 241, 0.3);
  color: #fff;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .nav-links {
    gap: 20px;
  }

  .nav-links a {
    font-size: 14px;
  }

  .hero {
    min-height: auto;
    padding-top: 100px;
    padding-bottom: 60px;
  }

  .projects-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .project-card {
    padding: 28px;
  }

  .projects-section {
    padding: 80px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 480px) {
  .projects-grid {
    padding: 0 16px;
  }

  .project-card {
    padding: 24px;
  }

  .hero-content {
    padding: 0 16px;
  }

  .section-header {
    padding: 0 16px;
  }
}