:root {
  --bg-primary: #070a12;
  --bg-secondary: #0f1420;
  --bg-card: rgba(17, 24, 39, 0.65);
  --bg-card-hover: rgba(23, 32, 50, 0.8);
  --text-primary: #edf2f9;
  --text-secondary: #b8c0cd;
  --text-muted: #7b8494;
  --accent: #4d94f5;
  --accent-light: #72abf7;
  --accent-glow: rgba(77, 148, 245, 0.3);
  --border: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.12);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 8px 30px rgba(77, 148, 245, 0.2);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family:
    "Inter",
    system-ui,
    -apple-system,
    sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
.container {
  max-width: 1150px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
a {
  text-decoration: none;
  color: inherit;
}
img {
  max-width: 100%;
  display: block;
}

header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(7, 10, 18, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition:
    background var(--transition),
    box-shadow var(--transition);
}
header.scrolled {
  background: rgba(7, 10, 18, 0.92);
  box-shadow: 0 4px 25px rgba(0, 0, 0, 0.6);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 0;
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transition: opacity var(--transition);
}
.logo:hover {
  opacity: 0.85;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  box-shadow: 0 0 15px var(--accent-glow);
  object-fit: cover;
}
.logo-name {
  font-size: 1.1rem;
  font-weight: 700;
}
.logo-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

nav {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
nav a {
  padding: 0.55rem 1rem;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
nav a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}
nav a.active {
  color: var(--accent-light);
  background: rgba(77, 148, 245, 0.12);
}
.nav-github {
  display: flex !important;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent) !important;
  color: #fff !important;
  font-weight: 600 !important;
  border-radius: 999px !important;
  padding: 0.55rem 1.2rem !important;
  box-shadow: 0 2px 12px rgba(77, 148, 245, 0.35);
  transition: all var(--transition-bounce) !important;
}
.nav-github:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(77, 148, 245, 0.5);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.section {
  display: none;
  padding-top: 7rem;
  padding-bottom: 4rem;
  min-height: 100vh;
}
.section.active {
  display: block;
  animation: fadeIn 0.4s ease;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}
h2 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.about-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 3rem;
}
.about-image-wrapper {
  position: relative;
  width: 180px;
  height: 180px;
  flex-shrink: 0;
}
.about-image {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent);
  box-shadow: 0 0 30px var(--accent-glow);
  position: relative;
  z-index: 1;
}
.image-glow {
  position: absolute;
  inset: -15px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  z-index: 0;
}
.about-text .greeting {
  font-size: 1.1rem;
  color: var(--text-muted);
}
.about-text .name {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
}
.about-text .tagline {
  font-size: 1.25rem;
  color: var(--accent-light);
  margin-bottom: 1rem;
}
.about-text .description {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  max-width: 500px;
}
.about-quote blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1.2rem;
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: 2rem;
}
.about-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: 999px;
  font-weight: 600;
  transition: all var(--transition-bounce);
  cursor: pointer;
  border: none;
  font-size: 0.95rem;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 15px rgba(77, 148, 245, 0.4);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(77, 148, 245, 0.6);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent);
  transform: translateY(-2px);
}
.extra-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}
.info-card {
  background: var(--bg-card);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition:
    transform var(--transition),
    border-color var(--transition);
}
.info-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}
.info-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--accent-light);
}
.info-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}
.skill-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  background: var(--bg-card);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.8rem 1.2rem;
  width: 130px;
  transition: all var(--transition);
}
.skill-card img {
  width: 48px;
  height: 48px;
  object-fit: contain;
}
.skill-card span {
  font-weight: 600;
  color: var(--accent-light);
}
.skill-card small {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 400;
}
.skill-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--bg-card);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}
.project-card h3 {
  font-size: 1.2rem;
  color: var(--accent-light);
}
.project-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
  flex: 1;
}
.project-stats {
  display: flex;
  gap: 1rem;
  font-size: 0.85rem;
  color: #f1c40f;
}

footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 3rem;
  position: relative;
  z-index: 10;
}
.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.footer-right a {
  color: var(--text-secondary);
  margin-left: 1.5rem;
  transition: color var(--transition);
}
.footer-right a:hover {
  color: var(--accent-light);
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 2000;
  padding: 1.5rem;
}
.overlay.open {
  display: flex;
}
.overlay-content {
  background: var(--bg-secondary);
  max-width: 600px;
  width: 100%;
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-hover);
}
.overlay-content h2 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}
.overlay-content p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
.overlay-close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition);
}
.overlay-close:hover {
  color: var(--accent);
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }
  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 280px;
    height: 100vh;
    background: rgba(7, 10, 18, 0.95);
    backdrop-filter: blur(25px);
    flex-direction: column;
    justify-content: center;
    padding: 2rem;
    gap: 1.2rem;
    transition: right 0.4s ease;
    border-left: 1px solid var(--border);
  }
  nav.open {
    right: 0;
  }
  nav a {
    font-size: 1.1rem;
    padding: 0.8rem 1rem;
    width: 100%;
    text-align: center;
  }
  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }
  .about-image-wrapper {
    margin: 0 auto;
    width: 150px;
    height: 150px;
  }
  .about-text .name {
    font-size: 2.4rem;
  }
  .about-actions {
    justify-content: center;
  }
  h2 {
    font-size: 1.8rem;
  }
  .footer-content {
    flex-direction: column;
    gap: 0.8rem;
    text-align: center;
  }
  .footer-right a {
    margin: 0 0.8rem;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 0.6rem 0;
  }
  .logo-icon {
    width: 32px;
    height: 32px;
  }
  .logo-name {
    font-size: 1rem;
  }
}

/* ── Custom Scrollbar ───────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(
    180deg,
    var(--accent) 0%,
    rgba(77, 148, 245, 0.3) 100%
  );
  border-radius: 999px;
  transition: background var(--transition);
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(
    180deg,
    var(--accent-light) 0%,
    var(--accent) 100%
  );
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-primary);
}

/* ── Language Toggle ────────────────────────────────────────── */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.8rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}
.lang-toggle:hover {
  border-color: var(--accent);
  background: rgba(77, 148, 245, 0.08);
}
.lang-sep {
  color: var(--border-light);
}
.lang-opt {
  transition: color var(--transition);
  color: var(--text-muted);
}
.lang-opt.lang-active {
  color: var(--accent-light);
}