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

:root {
  --bg: #f8f9fb;
  --surface: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #5f6368;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: rgba(59, 130, 246, 0.08);
  --border: rgba(0, 0, 0, 0.06);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --max-w: 1120px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-bg: rgba(248, 249, 251, 0.82);
}

:root.dark-theme {
  --bg: #0f1115;
  --surface: #1a1c23;
  --text: #e2e8f0;
  --text-secondary: #94a3b8;
  --accent: #60a5fa;
  --accent-hover: #93c5fd;
  --accent-light: rgba(59, 130, 246, 0.15);
  --border: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.2), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.3), 0 2px 4px rgba(0,0,0,0.2);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.4);
  --nav-bg: rgba(15, 17, 21, 0.82);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a.active {
  color: var(--accent);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}

.lang-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-icon-dark { display: none; }
:root.dark-theme .theme-icon-light { display: none; }
:root.dark-theme .theme-icon-dark { display: block; }

.lang-icon {
  display: flex;
  align-items: center;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero .accent {
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

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

.hero-visual {
  position: absolute;
  top: 50%;
  right: -10%;
  width: 600px;
  height: 600px;
  transform: translateY(-50%);
  z-index: 1;
}

.hero-glow {
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(59,130,246,0.12) 0%, rgba(139,92,246,0.06) 40%, transparent 70%);
  border-radius: 50%;
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.1); opacity: 1; }
}

/* ── Sections ── */
.section-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.about, .projects, .contact {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-label {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 16px;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── About Cards ── */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.about-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 32px 24px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.about-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: transparent;
}

.about-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--accent);
}

.about-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.about-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Projects ── */
.projects {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.projects-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.project-card {
  display: flex;
  gap: 28px;
  padding: 32px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.project-card:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.project-icon-wrap {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.project-icon-img {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.project-info {
  flex: 1;
  min-width: 0;
}

.project-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.project-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.project-badge {
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-released {
  background: rgba(34, 197, 94, 0.1);
  color: #16a34a;
}

.badge-beta {
  background: rgba(245, 158, 11, 0.1);
  color: #d97706;
}

.badge-dev {
  background: rgba(99, 102, 241, 0.1);
  color: #4f46e5;
}

.project-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
}

.project-links {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.project-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-xs);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.link-play {
  background: var(--accent);
  color: #fff;
}

.link-play:hover {
  background: var(--accent-hover);
}

.link-github {
  background: #24292f;
  color: #fff;
}

.link-github:hover {
  background: #000000;
}

:root.dark-theme .link-github {
  background: #e5e7eb;
  color: #111827;
}

:root.dark-theme .link-github:hover {
  background: #ffffff;
}

.link-readmore {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-xs);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  transition: var(--transition);
}

.link-readmore:hover {
  background: var(--accent-light);
}

.link-disabled {
  opacity: 0.45;
  pointer-events: none;
}

.project-meta {
  margin-top: 4px;
}

.meta-link {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* ── Team ── */
.team-hero {
  padding: 120px 0 80px;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.team-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}

.team-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: transparent;
}

.team-photo-wrap {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 20px;
  border: 3px solid var(--border);
}

.team-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.team-name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.team-role {
  display: inline-block;
  padding: 3px 10px;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.team-roles {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 12px;
}

.team-roles .team-role {
  margin-bottom: 0;
}

.team-bio {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.team-socials {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.team-socials a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
}

.team-socials a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

.team-empty {
  text-align: center;
  padding: 64px 24px;
}

.team-empty svg {
  margin-bottom: 16px;
}

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

/* ── Contact ── */
.contact-links {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ── Footer ── */
.footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
}

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

.footer-logo {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 4px;
  display: block;
}

.footer-left p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.footer-right {
  display: flex;
  gap: 24px;
}

.footer-right a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.footer-right a:hover {
  color: var(--accent);
}

/* ── Mobile ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    backdrop-filter: blur(20px);
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }

  .hero { padding: 100px 24px 60px; }
  .hero-visual { display: none; }

  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

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

  .project-card {
    flex-direction: column;
    gap: 16px;
    padding: 24px;
  }

  .project-icon-wrap {
    width: 64px;
    height: 64px;
  }

  .project-icon-img {
    width: 44px;
    height: 44px;
  }

  .about, .projects, .contact {
    padding: 64px 0;
  }

  .contact-links {
    flex-direction: column;
    align-items: center;
  }

  .footer-container {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .about-grid {
    grid-template-columns: 1fr;
  }

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

  .hero h1 { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
  .hero-actions { flex-direction: column; }
  .btn { justify-content: center; }
}