/* Modern responsive styles: glass + gradients + animations
   Mobile-first. Hamburger fixed, accessible, and animated.
*/

/* Prevent transitions during page load */
.is-loading * {
  transition: none !important;
  animation: none !important;
}

/* ===== Variables ===== */
:root{
  --bg: #0d1117;
  --panel: #161b22;
  --muted: #8b949e;
  --accent: #58a6ff;
  --accent-2: #79c0ff;
  --accent-dark: #06b6d4;
  --accent-light: rgba(88,166,255,0.15);
  --accent-border: rgba(88,166,255,0.25);
  --card: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.01));
  --radius: 16px;
  --shadow-sm: 0 8px 28px rgba(13,17,23,0.75);
  --glass: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.05);
  --container: 1200px;
  --focus: 3px solid rgba(88,166,255,0.5);
  --transition: 300ms cubic-bezier(0.2, 0, 0, 1);
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --scrollbar-width: 8px;
  color-scheme: dark;
}

/* ===== Reset & base ===== */
*{box-sizing:border-box;margin:0;padding:0}
html{
  height:100%;
  scroll-behavior:smooth;
  scroll-padding-top: 84px; /* Account for sticky header */
}
body{
  min-height:100%;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial;
  background: linear-gradient(135deg, #0d1117 0%, #0a0e27 50%, #101419 100%);
  color: #e6edf3;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.6;
  padding:8px 16px 48px;
  position: relative;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: var(--scrollbar-width);
  height: var(--scrollbar-width);
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--muted);
  border-radius: var(--scrollbar-width);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

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

/* Skip link */
.skip-link{position:absolute;left:-999px}
.skip-link:focus{left:24px;top:24px;background:var(--bg);color:var(--accent);padding:12px 16px;border-radius:8px;z-index:999;border:1px solid var(--accent-border)}

/* Header */
.site-header {
  position: sticky;
  top: 8px;
  z-index: 60;
  background: linear-gradient(90deg, var(--glass), var(--glass-border));
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 16px 28px;
  box-shadow: 0 8px 32px rgba(2,6,23,0.2);
  margin: 0 12px;
  border: 1px solid var(--glass-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.site-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(88,166,255,0.08),
    transparent 40%
  );
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.site-header:hover::before {
  opacity: 1;
}
.site-header:hover {
  background: linear-gradient(90deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  border-color: var(--accent-border);
}
.header-grid {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding: 0;
}
.brand {
  flex: 0 0 auto;
  margin-right: auto;
  padding-right: 120px;  /* Increased spacing */
}
.brand-link {
  text-decoration: none;
  color: inherit;
  transition: all var(--transition);
  position: relative;
  padding: 4px 12px;
  margin: -4px -12px;
  border-radius: 8px;
  display: inline-block;
  overflow: hidden;
}
.brand-link::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, 
    rgba(88,166,255,0.15), 
    rgba(121,192,255,0.1)
  );
  border-radius: inherit;
  opacity: 0;
  transform: translateY(100%) scale(1.5);
  transition: all var(--transition);
}
.brand-link:hover::before {
  opacity: 1;
  transform: translateY(0) scale(1);
}
.brand-name {
  font-weight: 700;
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  background: linear-gradient(90deg, #fff, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  position: relative;
  color: transparent;
  letter-spacing: -0.01em;
}
.brand-sub {
  display: block;
  font-size: clamp(0.75rem, 1.8vw, 0.88rem);
  color: var(--muted);
  margin-top: 6px;
  letter-spacing: 0.01em;
  font-weight: 400;
  line-height: 1.4;
}

@media (max-width: 600px) {
  .brand-sub {
    display: -webkit-box;
    display: box;
    -webkit-line-clamp: 1;
    line-clamp: 1;
    -webkit-box-orient: vertical;
    box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    transition: all var(--transition);
  }
  .brand-sub:hover, .brand-sub:focus {
    -webkit-line-clamp: 2;
    line-clamp: 2;
  }
  .brand-link {
    touch-action: manipulation;
  }
}

/* Top nav (desktop) */
.top-nav {
  display: flex;
  align-items: center;
  gap: 32px;  /* Space between nav items */
  margin-right: 48px;  /* Add space before hamburger */
}
.top-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius);
  transition: all var(--transition);
  position: relative;
  border: 1px solid transparent;
}
.top-nav a::before {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 20px;
  right: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: scaleX(0);
  transition: transform var(--transition-fast);
  border-radius: 2px;
  opacity: 0.8;
}
.top-nav a:hover {
  color: #fff;
  background: var(--accent-light);
  border-color: var(--accent-border);
}
.top-nav a:hover::before {
  transform: scaleX(1);
}

/* Buttons */
.btn{
  padding: 14px 28px;
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.04);
  background: transparent;
  color: inherit;
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  font-size: 1rem;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn:hover::before {
  transform: translateX(100%);
}

.btn.primary{
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #002229;
  border: none;
  box-shadow: 0 12px 24px rgba(6,182,212,0.15);
}

.btn.primary:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(6,182,212,0.3);
}

.btn.primary:active {
  transform: translateY(-2px);
}

.btn.outline{
  background: transparent;
  border: 1px solid rgba(255,255,255,0.12);
}

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

/* ===== Hamburger & Mobile Menu ===== */

/* hamburger button */
.hamburger {
  display: none;
  width: 50px;
  height: 50px;
  border-radius: 10px;
  border: none;
  background: transparent;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  z-index: 999;
  flex-direction: column;
  margin-left: auto;
  gap: 4px;
  transition: all 200ms ease-out;
  padding: 0;
}

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

.hamburger:active {
  transform: scale(0.92);
}

.hamburger .bar {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--muted);
  border-radius: 2px;
  transform-origin: center;
  transition: all 350ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  position: relative;
}

.hamburger .bar:nth-child(1) {
  transform: none;
}

.hamburger .bar:nth-child(2) {
  opacity: 1;
}

.hamburger .bar:nth-child(3) {
  transform: none;
}

/* Hamburger open state - Morphing X */
.hamburger.open .bar {
  background: var(--accent);
}

.hamburger.open .bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.hamburger.open .bar:nth-child(2) {
  opacity: 0;
  width: 0;
}

.hamburger.open .bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* full-screen mobile menu overlay (slide down) */
.mobile-menu {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(7,20,40,0.96) 0%, rgba(2,6,23,0.98) 100%);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: -1;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  will-change: opacity, visibility;
  transition: opacity 400ms cubic-bezier(0.34, 1.56, 0.64, 1),
              visibility 0ms linear 400ms,
              z-index 0ms linear 400ms;
}

.mobile-menu[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  z-index: 998;
  transition: opacity 400ms cubic-bezier(0.34, 1.56, 0.64, 1),
              visibility 0ms linear 0ms,
              z-index 0ms linear 0ms;
}

.mobile-inner {
  width: 100%;
  max-width: 100%;
  padding: 0;
  background: transparent;
  border-radius: 0;
  border: none;
  box-shadow: none;
  animation: none;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 64px;
}
.mobile-close {
  position: fixed;
  right: 32px;
  top: 32px;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(88,166,255,0.08);
  border: 1px solid var(--accent-border);
  color: var(--muted);
  font-size: 36px;
  font-weight: 300;
  cursor: pointer;
  transition: all 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
  padding: 0;
  border-radius: 12px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 999;
}

.mobile-close:hover {
  color: var(--accent);
  background: rgba(88,166,255,0.15);
  border-color: rgba(88,166,255,0.4);
  transform: rotate(90deg) scale(1.1);
}

.mobile-close:active {
  transform: rotate(90deg) scale(0.95);
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 40px;
  padding: 0;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 100%;
}

.mobile-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 1.5rem;
  padding: 16px 32px;
  border-radius: 8px;
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  transition: all 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  display: inline-block;
  text-align: center;
  letter-spacing: 0.3px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.mobile-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transform: translateX(-50%);
  transition: width 300ms cubic-bezier(0.34, 1.56, 0.64, 1);
  border-radius: 2px;
}

.mobile-nav a:hover {
  color: var(--accent);
  background: rgba(88,166,255,0.15);
  border-color: rgba(88,166,255,0.35);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(88,166,255,0.2);
}

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

/* ===== Hero ===== */
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 32px;
  align-items: center;
  padding: 48px 0 32px;
}

.hero-title {
  font-family: 'Space Grotesk',sans-serif;
  font-weight: 600;
  font-size: clamp(1.8rem,4vw,2.8rem);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-lead {
  color: var(--muted);
  font-size: clamp(1rem,1.8vw,1.15rem);
  line-height: 1.6;
  max-width: 85ch;
}

@media (max-width: 820px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .profile-visual {
    margin: 24px -16px 0;
  }

  .visual-card {
    border-radius: 12px;
    margin: 0 16px;
  }
}
.hero-ctas{display:flex;gap:16px;margin-top:32px}
.visual-card {
  position: relative;
  border-radius: var(--radius);
  height: 320px;
  overflow: hidden;
  box-shadow: 
    0 25px 50px -12px rgba(2,6,23,0.75),
    0 0 0 1px rgba(255,255,255,0.05);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px;
  background: linear-gradient(135deg, rgba(88,166,255,0.12), rgba(121,192,255,0.08));
  transition: all var(--transition);
  will-change: transform, box-shadow;
}

.profile-link {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  z-index: 2;
  transition: all var(--transition);
  padding-top: 48px;
}

.profile-placeholder {
  width: 96px;
  height: 96px;
  color: var(--accent);
  opacity: 0.7;
  transition: all var(--transition);
  transform: translateY(0);
  filter: drop-shadow(0 4px 12px rgba(88,166,255,0.2));
}

.profile-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, 
    rgba(2,6,23,0.95) 0%, 
    rgba(2,6,23,0.4) 50%,
    rgba(2,6,23,0.1) 100%
  );
  transition: all var(--transition);
  z-index: 1;
}

.profile-link:hover .profile-placeholder {
  transform: translateY(4px) scale(1.1);
  opacity: 1;
  color: #fff;
  filter: drop-shadow(0 8px 24px rgba(88,166,255,0.4));
}

.profile-link:hover ~ .visual-labels {
  transform: translateY(-4px);
  opacity: 1;
}

.profile-link:hover .profile-overlay {
  background: linear-gradient(to top, 
    rgba(2,6,23,0.98) 0%, 
    rgba(2,6,23,0.5) 50%,
    rgba(88,166,255,0.15) 100%
  );
}



.visual-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(255,255,255,0.06),
    transparent 40%
  );
  opacity: 0;
  transition: opacity var(--transition);
}

.visual-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 
    0 30px 60px -12px rgba(2,6,23,0.85),
    0 0 0 1px rgba(255,255,255,0.08);
}

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

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

.visual-labels {
  position: relative;
  z-index: 3;
  transition: transform var(--transition);
  transform: translateY(0);
  margin-top: auto;
  padding-top: 24px;
}

.visual-name {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: #fff;
  letter-spacing: -0.01em;
  text-shadow: 0 2px 10px rgba(2,6,23,0.5);
  opacity: 0.95;
  transition: opacity var(--transition);
}

.visual-role {
  font-size: 1rem;
  color: var(--muted);
  letter-spacing: 0.01em;
  line-height: 1.6;
  max-width: 280px;
  text-shadow: 0 2px 10px rgba(2,6,23,0.5);
  opacity: 0.8;
  transition: opacity var(--transition);
}

.profile-link:hover ~ .visual-labels .visual-role {
  opacity: 1;
  color: var(--accent);
}

/* Decorative elements */
.visual-pattern {
  position: absolute;
  inset: 0;
  z-index: 1;
  mix-blend-mode: soft-light;
  pointer-events: none;
  opacity: 0.4;
}

@media (max-width: 820px) {
  .hero-grid {
    gap: 24px;
  }
  
  .visual-card {
    height: 180px;
    padding: 20px;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 20px;
  }

  .profile-link {
    position: relative;
    inset: auto;
    padding: 0;
    width: auto;
  }

  .profile-placeholder {
    width: 64px;
    height: 64px;
    transform: none;
  }

  .profile-link:hover .profile-placeholder {
    transform: scale(1.1);
  }

  .visual-labels {
    margin-top: 0;
    padding-top: 0;
    flex: 1;
  }

  .visual-name {
    font-size: 1.1rem;
    margin-bottom: 4px;
  }

  .visual-role {
    font-size: 0.9rem;
    opacity: 0.9;
  }

  .profile-overlay {
    display: none;
  }

  /* Adjust card background for better mobile contrast */
  .visual-card {
    background: linear-gradient(135deg, 
      rgba(88,166,255,0.12),
      rgba(121,192,255,0.08)
    );
  }
}

/* ===== Sections & cards ===== */
.section {
  padding: 96px 0;
  position: relative;
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent,
    rgba(255,255,255,0.1) 20%,
    rgba(255,255,255,0.1) 80%,
    transparent
  );
}

.section-title {
  font-size: 2rem;
  color: #fff;
  font-weight: 700;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
  text-align: center;
  font-family: 'Space Grotesk', sans-serif;
  position: relative;
  padding-bottom: 16px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 3px;
  transition: transform var(--transition);
  animation: slideIn 0.6s ease-out forwards;
}

@keyframes slideIn {
  to {
    transform: translateX(-50%) scaleX(1);
  }
}

.grid {
  display: grid;
  gap: 32px;
  max-width: 100%;
}

/* Bento grid layout for projects */
.projects-grid {
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: minmax(240px, auto);
  grid-auto-flow: dense;
  gap: 24px;
}

/* Featured projects - wider cards (asymmetric pattern) */
.projects-grid .card:nth-child(1),
.projects-grid .card:nth-child(8) {
  grid-column: span 2;
}

/* Special feature cards with gradients */
.projects-grid .card:nth-child(4) {
  grid-column: 2 / -1;
  background: linear-gradient(135deg, 
    rgba(88,166,255,0.08),
    rgba(121,192,255,0.04)
  );
}

.projects-grid .card:nth-child(6) {
  grid-column: 1 / 3;
  background: linear-gradient(135deg, 
    rgba(121,192,255,0.08),
    rgba(88,166,255,0.04)
  );
}

@media (max-width: 1200px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .projects-grid .card:nth-child(7) {
    grid-column: auto;
    background: var(--card);
  }
  .projects-grid .card {
    grid-column: auto !important;
    grid-row: auto !important;
  }
}

/* Course grid with alternating sizes */
.courses-grid {
  grid-template-columns: repeat(2, 1fr);
  grid-auto-rows: minmax(220px, auto);
}

.courses-grid .card:nth-child(3n+1) {
  grid-column: span 2;
  background: linear-gradient(135deg, 
    rgba(88,166,255,0.1),
    rgba(121,192,255,0.05)
  );
}

/* card */
.card {
  background: var(--card);
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: 
    0 15px 35px rgba(2,6,23,0.55),
    0 0 0 1px rgba(255,255,255,0.03);
  transition: all var(--transition);
  transform-origin: center;
  opacity: 0;
  transform: translateY(12px) scale(0.98);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(88,166,255,0.08),
    transparent 40%
  );
  opacity: 0;
.card::after {
  content: '';
  position: absolute;
  top: 0;
.card.show {
  opacity: 1;
  transform: none;
  animation: revealCard 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes revealCard {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: none;
  }
} background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left;
  transition: opacity var(--transition), transform var(--transition);
  border-radius: 3px 3px 0 0;
} opacity: 0;
  transition: opacity var(--transition);
  border-radius: 3px 3px 0 0;
}

.card.show {
  opacity: 1;
  transform: none;
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 
    0 25px 45px rgba(2,6,23,0.7),
    0 0 0 1px rgba(255,255,255,0.08);
}

.card:hover h3 {
  color: var(--accent);
}

.card:hover p {
  color: rgba(230,248,255,0.95);
}
.card:hover::before {
  opacity: 1;
}

.card:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

.card h3 {
  margin-bottom: 8px;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  color: #fff;
  font-weight: 600;
  line-height: 1.3;
  position: relative;
  transition: all var(--transition-fast);
}

.card h3:hover {
  color: var(--accent);
}

.meta {
  color: var(--muted);
  font-size: 0.8rem;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
  opacity: 0.65;
  font-weight: 400;
}

.meta strong {
  display: none;
}

.card p {
  line-height: 1.6;
  margin-bottom: 0;
  color: var(--muted);
  transition: color var(--transition-fast);
  font-size: 0.95rem;
}

.card-link {
  display: inline-block;
  margin-top: 14px;
  margin-bottom: 0;
}

/* Tech stack styles */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.tech-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  background: linear-gradient(135deg, 
    rgba(88,166,255,0.15),
    rgba(121,192,255,0.1)
  );
  border: 1px solid var(--accent-border);
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.5px;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-transform: uppercase;
}

.tech-tag:hover {
  background: linear-gradient(135deg, 
    rgba(88,166,255,0.25),
    rgba(121,192,255,0.15)
  );
  border-color: rgba(88,166,255,0.5);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(88,166,255,0.2);
}

/* Global link styles */
a {
  text-decoration: none;
  color: var(--accent);
}

.card a {
  color: var(--accent);
  font-weight: 500;
  padding: 6px 0;
  margin: 0;
  border-radius: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  position: relative;
  transition: all var(--transition-fast);
  background: transparent;
  border: none;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
}

.card a::after {
  content: '→';
  opacity: 0;
  transform: translateX(-4px);
  transition: all var(--transition-fast);
  font-size: 0.9em;
}

.card a:hover {
  background: transparent;
  border-color: transparent;
  color: var(--accent-2);
  transform: none;
}

.card a:hover::after {
  opacity: 1;
  transform: translateX(4px);
}

/* ===== Footer ===== */
.site-footer{
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
  margin-top: 100px;
  padding: 56px 48px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, 
    rgba(88, 166, 255, 0.08) 0%, 
    rgba(121, 192, 255, 0.04) 100%);
  box-shadow: 0 8px 32px rgba(13, 17, 23, 0.5),
              inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(88, 166, 255, 0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(88, 166, 255, 0.1),
    transparent 40%
  );
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.site-footer:hover::before {
  opacity: 1;
}

.footer-left {
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
}

.footer-left p {
  color: var(--muted);
  font-size: 0.95rem;
  transition: all var(--transition);
  position: relative;
  font-weight: 500;
  letter-spacing: 0.5px;
}

.footer-left p:hover {
  color: var(--accent);
}

.resume-link {
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border-radius: 8px;
  background: linear-gradient(135deg, 
    rgba(88, 166, 255, 0.15),
    rgba(121, 192, 255, 0.08));
  border: 1.5px solid rgba(88, 166, 255, 0.3);
  width: fit-content;
  box-shadow: 0 4px 15px rgba(88, 166, 255, 0.15);
}

.resume-link:hover {
  background: linear-gradient(135deg, 
    rgba(88, 166, 255, 0.25),
    rgba(121, 192, 255, 0.15));
  border-color: rgba(88, 166, 255, 0.5);
  color: var(--accent-2);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(88, 166, 255, 0.25);
}

.socials {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.social {
  color: var(--muted);
  transition: all var(--transition-fast);
  padding: 12px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  position: relative;
  background: var(--accent-light);
  border: 1.5px solid var(--accent-border);
  overflow: hidden;
}

.social::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, 
    rgba(88,166,255,0.2),
    transparent 70%
  );
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.social:hover {
  color: var(--accent);
  background: rgba(88,166,255,0.15);
  border-color: rgba(88,166,255,0.35);
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(88,166,255,0.2);
}

.social:hover::before {
  opacity: 1;
}

.social svg {
  width: 24px;
  height: 24px;
  position: relative;
  z-index: 1;
}

/* focus */
:focus{outline:var(--focus);outline-offset:3px;border-radius:8px}

/* reduced motion */
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .projects-grid .card:nth-child(1),
  .projects-grid .card:nth-child(4),
  .projects-grid .card:nth-child(7) {
    grid-column: span 1;
  }
}

@media (max-width: 920px) {
  .courses-grid {
    grid-template-columns: 1fr;
  }
  .courses-grid .card:nth-child(3n+1) {
    grid-column: span 1;
  }
  .section {
    padding: 72px 0;
  }
  .section-title {
    font-size: 1.75rem;
    margin-bottom: 36px;
  }
}

@media (max-width: 820px) {
  .top-nav{display:none}
  .hamburger{display:inline-flex;margin-right:-12px}
  .hero-grid{grid-template-columns:1fr}
  .visual-card{height:160px}
  .projects-grid,.courses-grid{grid-template-columns:1fr}
  .site-header{
    position:sticky;
    top:0;
    margin:0;
    border-radius:0;
    background:linear-gradient(to bottom, rgba(7,20,40,0.95), rgba(7,20,40,0.9));
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
  }
  body{
    padding:0 0 24px;
  }
  .container{
    padding:0 16px;
  }
  
  /* Footer mobile styling */
  .site-footer {
    flex-direction: column;
    gap: 24px;
    text-align: center;
    padding: 32px 16px;
    margin-top: 60px;
    border-radius: 12px;
  }
  .footer-left {
    order: 2;
    width: 100%;
    gap: 12px;
  }
  .footer-left p {
    font-size: 0.9rem;
    margin-bottom: 0;
  }
  .resume-link {
    width: 100%;
    justify-content: center;
    font-size: 0.9rem;
    padding: 10px 16px;
  }
  .socials {
    order: 1;
    justify-content: center;
    width: 100%;
    gap: 12px;
  }
  .social {
    width: 44px;
    height: 44px;
    padding: 10px;
  }
  .social svg {
    width: 22px;
    height: 22px;
  }
  
  /* Optimize mobile spacing */
  .section {
    padding: 48px 0;
  }
  .section-title {
    margin-bottom: 24px;
  }
  .grid {
    gap: 16px;
  }
  .card {
    padding: 20px;
  }
  .card h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
  }
  .card p {
    font-size: 0.95rem;
    margin-bottom: 1rem;
  }
  .meta {
    font-size: 0.85rem;
    margin-bottom: 12px;
  }
  /* Increase touch targets */
  .card a {
    padding: 8px 16px;
    margin: -8px -16px;
  }
  
  /* Tech stack on mobile */
  .tech-stack {
    gap: 6px;
    margin-top: 12px;
    padding-top: 12px;
  }
  
  .tech-tag {
    padding: 5px 10px;
    font-size: 0.75rem;
  }
  
  /* Responsive button sizing */
  .btn {
    padding: 12px 20px;
    font-size: 0.95rem;
    min-width: fit-content;
  }
  
  .cta-buttons {
    flex-direction: column;
    gap: 12px;
  }
  
  .btn.primary,
  .btn.outline {
    width: 100%;
    max-width: none;
  }
}