/* -------- Design tokens -------- */
:root {
    --bg-dark: #0a0b0d;
    --bg-darker: #060708;
    --bg-elevated: #111318;
    --card-bg: #14161b;
    --card-bg-hover: #1a1d24;
    --text-light: #f0f2f5;
    --text-muted: #9ca3af;
    --text-dim: #6b7280;
    --accent: #22d3ee;
    --accent-soft: rgba(34, 211, 238, 0.15);
    --accent-muted: #67b8d4;
    --border: #2d3239;
    --border-focus: #22d3ee;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 24px rgba(34, 211, 238, 0.2);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --font-medium: Poppins-Medium, "Helvetica Neue", Arial, sans-serif;
    --font-bold-italic: Poppins-BoldItalic, "Helvetica Neue", Arial, sans-serif;
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  }
  
  @font-face {
    font-family: "Poppins-Medium";
    src: url("./fonts/Poppins-Medium.ttf");
  }
  @font-face {
    font-family: "Poppins-BoldItalic";
    src: url("./fonts/Poppins-BoldItalic.ttf");
  }
  
  /* -------- Reset -------- */
  *,
  *::before,
  *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
/* -------- Base -------- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

html,
body {
  font-family: var(--font-medium);
  background: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -ms-overflow-style: none;
  scrollbar-width: none;
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
  display: none;
  width: 0;
  background: transparent;
}

::selection {
  background: var(--accent-soft);
  color: var(--accent);
}

/* -------- Navigation -------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 11, 13, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background 0.3s var(--ease-out);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-logo {
  font-family: var(--font-bold-italic);
  font-size: 1.4rem;
  color: var(--text-light);
  text-decoration: none;
  background: linear-gradient(135deg, var(--text-light) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: opacity 0.2s var(--ease-out);
}

.nav-logo:hover {
  opacity: 0.8;
}

.nav-menu {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: color 0.2s var(--ease-out);
}

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

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

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

.nav-link.active {
  color: var(--accent);
}
  
/* -------- Hero -------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-lg);
  padding-top: calc(70px + var(--spacing-lg));
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(34, 211, 238, 0.3), transparent),
    var(--bg-dark);
}

.hero #githubAvatar {
  width: 10rem;
  height: 10rem;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 3px solid var(--border);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255, 255, 255, 0.04);
  margin-bottom: var(--spacing-md);
  transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.hero #githubAvatar:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: scale(1.02);
}

.hero h1 {
  font-family: var(--font-bold-italic);
  font-size: clamp(2.25rem, 6vw, 4rem);
  color: var(--text-light);
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-xs);
  background: linear-gradient(135deg, var(--text-light) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-tagline {
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--accent);
  font-weight: 600;
  margin: 0 auto var(--spacing-xs);
  min-height: 2em;
}

.cursor-blink {
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-subtitle {
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  color: var(--text-muted);
  max-width: 28em;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.65;
}
  
  /* -------- Link buttons -------- */
  .links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
  }
  
  .link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: border-color 0.25s var(--ease-out), background 0.25s var(--ease-out),
      color 0.25s var(--ease-out), transform 0.2s var(--ease-out), box-shadow 0.25s var(--ease-out);
  }
  
  .link-btn img {
    width: 1.15rem;
    height: 1.15rem;
    flex-shrink: 0;
    filter: invert(1);
    opacity: 0.9;
  }
  
  .link-btn:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }
  
  .link-btn.github:hover img { filter: invert(1); opacity: 1; }
  .link-btn.email:hover img { filter: invert(1); opacity: 1; }
  .link-btn.tiktok:hover img { filter: invert(1); opacity: 1; }
  
.link-btn:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* -------- Skills Section -------- */
.skills {
  padding: var(--spacing-xl) var(--spacing-lg);
  background: var(--bg-dark);
  text-align: center;
}

.skills h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: var(--spacing-xl);
  letter-spacing: -0.02em;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: var(--spacing-md);
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
}

.skill-item {
  background: var(--card-bg);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out),
    transform 0.3s var(--ease-out);
}

.skill-item:hover {
  border-color: rgba(34, 211, 238, 0.4);
  background: var(--card-bg-hover);
  transform: translateY(-4px);
}

.skill-item img {
  width: 2.5rem;
  height: 2.5rem;
  filter: invert(1);
  opacity: 0.9;
}

.skill-item span {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.github-stats {
  margin-top: var(--spacing-xl);
  display: flex;
  justify-content: center;
}

.github-stats img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

/* -------- Projects -------- */
.projects {
  padding: var(--spacing-xl) var(--spacing-lg);
  background: var(--bg-darker);
}
  
  .projects h2 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 600;
    color: var(--text-light);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.02em;
  }
  
  .grid {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    max-width: 1100px;
    margin: 0 auto;
  }
  
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.25s var(--ease-out), background 0.25s var(--ease-out),
    transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
  display: flex;
  flex-direction: column;
  text-align: left;
  overflow: hidden;
}

.card:hover {
  border-color: rgba(34, 211, 238, 0.4);
  background: var(--card-bg-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s var(--ease-out);
}

.card:hover .card-image img {
  transform: scale(1.05);
}

.card-content {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-content h3 {
  font-size: 1.15rem;
  color: var(--accent);
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
}

.card-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
  flex-grow: 1;
  line-height: 1.55;
}

.card-content a {
  color: var(--accent-muted);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.2s var(--ease-out), gap 0.2s var(--ease-out);
}

.card-content a::after {
  content: "→";
  font-weight: 700;
}

.card-content a:hover {
  color: var(--accent);
  gap: 0.5rem;
}

.card:focus-within {
  border-color: rgba(34, 211, 238, 0.5);
}

.card-content a:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}
  
/* -------- Animations -------- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* -------- Footer -------- */
.footer {
  text-align: center;
  padding: var(--spacing-lg);
  font-size: 0.875rem;
  color: var(--text-dim);
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
}

.footer p {
  margin: 0;
}

.footer a {
  color: var(--accent);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}
  
/* -------- Responsive tweaks -------- */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 var(--spacing-sm);
  }

  .nav-menu {
    gap: var(--spacing-md);
  }

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

  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--spacing-sm);
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: calc(70px + var(--spacing-md));
    padding-bottom: var(--spacing-xl);
  }

  .hero #githubAvatar {
    width: 8rem;
    height: 8rem;
  }

  .links {
    gap: var(--spacing-xs);
  }

  .link-btn {
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
  }

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

  .card-image {
    height: 160px;
  }
}