/* ════════════════════════════════════════════════════════
   MD. Naimur Rahman – Portfolio CSS
   Premium dark theme · Glassmorphism · Micro-animations
   ════════════════════════════════════════════════════════ */

/* ── DESIGN TOKENS ── */
:root {
  --bg-primary: #060609;
  --bg-secondary: #0d0d14;
  --bg-tertiary: #12121c;
  --surface-1: rgba(255,255,255,0.04);
  --surface-2: rgba(255,255,255,0.07);
  --surface-border: rgba(255,255,255,0.08);

  --accent-blue: #4f8eff;
  --accent-purple: #8b5cf6;
  --accent-cyan: #22d3ee;
  --accent-pink: #f472b6;
  --accent-green: #10b981;

  --gradient-primary: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-purple) 100%);
  --gradient-glow: linear-gradient(135deg, rgba(79,142,255,0.15) 0%, rgba(139,92,246,0.15) 100%);
  --gradient-text: linear-gradient(135deg, #4f8eff 0%, #a78bfa 50%, #f472b6 100%);

  --text-primary: #f0f0f5;
  --text-secondary: #8b8ba0;
  --text-muted: #555568;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.4), 0 1px 2px rgba(0,0,0,.3);
  --shadow-md: 0 4px 24px rgba(0,0,0,.5), 0 2px 8px rgba(0,0,0,.4);
  --shadow-lg: 0 20px 60px rgba(0,0,0,.6), 0 8px 24px rgba(0,0,0,.4);
  --shadow-glow: 0 0 40px rgba(79,142,255,0.15);

  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 0.6s cubic-bezier(0.4,0,0.2,1);
  --transition-spring: 0.5s cubic-bezier(0.34,1.56,0.64,1);

  --nav-h: 68px;
}

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; font: inherit; }
ul { list-style: none; }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: rgba(79,142,255,0.35); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(79,142,255,0.6); }

/* ── CUSTOM CURSOR ── */
.cursor {
  width: 10px; height: 10px;
  background: var(--accent-blue);
  border-radius: 50%;
  position: fixed; top: 0; left: 0;
  pointer-events: none; z-index: 9999;
  transform: translate(-50%,-50%);
  transition: transform 0.1s, background 0.3s;
  mix-blend-mode: difference;
}
.cursor-follower {
  width: 32px; height: 32px;
  border: 1.5px solid rgba(79,142,255,0.45);
  border-radius: 50%;
  position: fixed; top: 0; left: 0;
  pointer-events: none; z-index: 9998;
  transform: translate(-50%,-50%);
  transition: all 0.18s cubic-bezier(0.4,0,0.2,1);
}

/* ── LOADER ── */
#loader {
  position: fixed; inset: 0;
  background: var(--bg-primary);
  z-index: 99999;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s;
}
#loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.loader-inner { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.loader-logo {
  font-size: 2.5rem; font-weight: 800;
  background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  animation: pulseScale 1.2s ease-in-out infinite alternate;
}
@keyframes pulseScale { from { transform: scale(1); } to { transform: scale(1.08); } }
.loader-bar {
  width: 180px; height: 2px;
  background: var(--surface-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.loader-progress {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  animation: loadBar 1.4s cubic-bezier(0.4,0,0.2,1) forwards;
}
@keyframes loadBar { from { width: 0; } to { width: 100%; } }

/* ── CONTAINER ── */
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ── NAVIGATION ── */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  transition: background var(--transition), box-shadow var(--transition);
}
#navbar.scrolled {
  background: rgba(6,6,9,0.85);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--surface-border);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.nav-container {
  max-width: 1160px; margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; gap: 32px;
}
.nav-logo {
  display: flex; align-items: center; gap: 4px;
  font-size: 1.2rem; font-weight: 800;
  background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  flex-shrink: 0;
}
.logo-dot {
  width: 6px; height: 6px;
  background: var(--accent-blue);
  border-radius: 50%;
  animation: blink 2s ease-in-out infinite;
  flex-shrink: 0;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }
.nav-links {
  display: flex; align-items: center; gap: 4px;
  margin-left: auto;
}
.nav-link {
  font-size: 0.875rem; font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 14px; border-radius: var(--radius-full);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: var(--surface-2);
}
.nav-resume {
  margin-left: 8px; flex-shrink: 0;
}
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  padding: 8px; margin-left: auto;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-secondary);
  border-radius: 2px; transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 24px; border-radius: var(--radius-full);
  font-size: 0.9rem; font-weight: 600;
  transition: all var(--transition);
  cursor: pointer; white-space: nowrap;
}
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(79,142,255,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(79,142,255,0.5);
}
.btn-outline {
  border: 1.5px solid var(--surface-border);
  color: var(--text-primary);
  background: transparent;
}
.btn-outline:hover {
  border-color: var(--accent-blue);
  background: rgba(79,142,255,0.08);
  transform: translateY(-2px);
}
.btn-ghost {
  color: var(--text-secondary);
  background: transparent;
}
.btn-ghost:hover { color: var(--text-primary); }
.btn-sm { padding: 8px 16px; font-size: 0.8rem; }
.mt-sm { margin-top: 12px; }

/* ── GLASS CARD ── */
.glass-card {
  background: var(--surface-1);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--transition);
}
.glass-card:hover {
  border-color: rgba(79,142,255,0.2);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

/* ── GRADIENT TEXT ── */
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── SECTION ── */
.section { padding: 100px 0; }
.section-alt { background: var(--bg-secondary); }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--accent-blue);
  background: rgba(79,142,255,0.1);
  border: 1px solid rgba(79,142,255,0.2);
  padding: 6px 14px; border-radius: var(--radius-full);
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800; letter-spacing: -0.02em;
  line-height: 1.15;
}

/* ── SCROLL REVEAL ── */
.reveal {
  opacity: 0; transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ═══════════════════════════════
   HERO SECTION
   ═══════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  position: relative; overflow: hidden;
  padding-top: var(--nav-h);
}
.hero-bg {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
}
.hero-orb {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: 0.35;
  animation: orbFloat 8s ease-in-out infinite alternate;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(79,142,255,0.4), transparent 70%);
  top: -15%; left: -10%;
  animation-duration: 10s;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(139,92,246,0.4), transparent 70%);
  top: 40%; right: -8%;
  animation-duration: 13s; animation-direction: alternate-reverse;
}
.orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(244,114,182,0.25), transparent 70%);
  bottom: 5%; left: 35%;
  animation-duration: 9s;
}
@keyframes orbFloat {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, -40px) scale(1.08); }
}
#particles-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }

.hero-grid {
  position: relative; z-index: 1;
  max-width: 1160px; margin: 0 auto; padding: 80px 24px;
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center; width: 100%;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(16,185,129,0.1);
  border: 1px solid rgba(16,185,129,0.25);
  border-radius: var(--radius-full);
  padding: 8px 16px; margin-bottom: 28px;
  font-size: 0.82rem; font-weight: 500; color: var(--accent-green);
}
.badge-dot {
  width: 8px; height: 8px;
  background: var(--accent-green); border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(16,185,129,0.4);
  animation: ripple 2s ease-out infinite;
}
@keyframes ripple {
  0% { box-shadow: 0 0 0 0 rgba(16,185,129,0.4); }
  70% { box-shadow: 0 0 0 10px rgba(16,185,129,0); }
  100% { box-shadow: 0 0 0 0 rgba(16,185,129,0); }
}
.hero-name {
  font-size: clamp(2.8rem, 5.5vw, 4.2rem);
  font-weight: 900; letter-spacing: -0.03em;
  line-height: 1.05; margin-bottom: 20px;
}
.name-line { display: block; }
.hero-title {
  font-size: 1.2rem; color: var(--text-secondary);
  margin-bottom: 20px; font-weight: 500;
  display: flex; align-items: center; gap: 4px; flex-wrap: wrap;
}
.title-static { color: var(--text-secondary); }
.typed-wrapper { display: flex; align-items: center; }
.typed-text {
  color: var(--accent-blue); font-weight: 600;
  min-width: 2px;
}
.typed-cursor {
  color: var(--accent-blue);
  animation: blink 1.1s step-end infinite;
  font-weight: 300; margin-left: 1px;
}
.hero-subtitle {
  font-size: 1.05rem; color: var(--text-secondary);
  line-height: 1.7; margin-bottom: 36px; max-width: 520px;
}
.hero-subtitle strong { color: var(--text-primary); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 40px; }
.hero-socials { display: flex; gap: 12px; }
.social-link {
  display: flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; border-radius: var(--radius-md);
  background: var(--surface-1);
  border: 1px solid var(--surface-border);
  color: var(--text-secondary);
  transition: all var(--transition);
}
.social-link:hover {
  color: var(--accent-blue);
  border-color: rgba(79,142,255,0.4);
  background: rgba(79,142,255,0.1);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(79,142,255,0.2);
}

/* Profile visual */
.hero-visual {
  display: flex; flex-direction: column;
  align-items: center; gap: 24px;
}
.profile-ring {
  position: relative; width: 320px; height: 320px;
  display: flex; align-items: center; justify-content: center;
}
.profile-ring-inner {
  width: 240px; height: 240px; border-radius: 50%;
  overflow: hidden;
  background: var(--gradient-primary);
  padding: 3px;
  box-shadow: 0 0 60px rgba(79,142,255,0.3), 0 0 120px rgba(139,92,246,0.15);
  animation: rotateBorder 8s linear infinite;
}
@keyframes rotateBorder {
  0%   { box-shadow: 0 0 60px rgba(79,142,255,0.3), 0 0 120px rgba(139,92,246,0.15); }
  50%  { box-shadow: 0 0 60px rgba(139,92,246,0.4), 0 0 120px rgba(79,142,255,0.15); }
  100% { box-shadow: 0 0 60px rgba(79,142,255,0.3), 0 0 120px rgba(139,92,246,0.15); }
}
.profile-img {
  width: 100%; height: 100%; object-fit: cover; border-radius: 50%;
  background: var(--bg-tertiary);
  object-position: center 30%;
  transform: scale(1.15);
}

/* Orbit icons */
.ring-orbit {
  position: absolute; pointer-events: none;
}
.orbit-icon {
  width: 44px; height: 44px;
  background: var(--surface-2);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700;
  color: var(--accent-blue);
  font-family: var(--font-mono);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-sm);
}
.orbit-1 { top: 10%; right: 0; animation: floatOrbit 4s ease-in-out infinite; }
.orbit-2 { bottom: 10%; right: 0; animation: floatOrbit 5s ease-in-out infinite reverse; }
.orbit-3 { top: 10%; left: 0; animation: floatOrbit 6s ease-in-out infinite 1s; }
.orbit-4 { bottom: 10%; left: 0; animation: floatOrbit 4.5s ease-in-out infinite 0.5s reverse; }
@keyframes floatOrbit {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Code card */
.hero-code-card {
  width: 100%; max-width: 340px;
  border-radius: var(--radius-md);
  overflow: hidden;
}
.code-card-header {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--surface-border);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red    { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green  { background: #28c840; }
.code-filename {
  margin-left: auto; font-size: 0.75rem;
  font-family: var(--font-mono); color: var(--text-muted);
}
.code-body {
  padding: 18px; font-family: var(--font-mono);
  font-size: 0.82rem; line-height: 1.75;
  overflow-x: auto;
}
.code-body code { display: block; }
.kw  { color: #7dd3fc; }
.cls { color: #86efac; }
.str { color: #fcd34d; }

/* Scroll indicator */
.scroll-indicator {
  position: absolute; bottom: 36px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 0.75rem; color: var(--text-muted); letter-spacing: 0.1em;
  animation: fadeInUp 1s ease 2s both;
  z-index: 1;
}
.scroll-mouse {
  width: 22px; height: 36px;
  border: 1.5px solid var(--text-muted);
  border-radius: 11px;
  display: flex; justify-content: center; padding-top: 6px;
}
.scroll-wheel {
  width: 3px; height: 8px;
  background: var(--text-muted); border-radius: 2px;
  animation: scrollWheel 1.8s ease-in-out infinite;
}
@keyframes scrollWheel {
  0%   { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(10px); opacity: 0; }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ═══════════════════════════════
   STATS SECTION
   ═══════════════════════════════ */
.stats-section { padding: 60px 0; }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.stat-card {
  padding: 28px; text-align: center;
  border-radius: var(--radius-lg);
}
.stat-number {
  font-size: 2.4rem; font-weight: 900;
  background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1; margin-bottom: 8px;
  font-family: var(--font-sans);
}
.stat-label { font-size: 0.82rem; color: var(--text-secondary); font-weight: 500; }

/* ═══════════════════════════════
   ABOUT SECTION
   ═══════════════════════════════ */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px;
  align-items: start;
}
.about-lead {
  font-size: 1.05rem; line-height: 1.8;
  color: var(--text-secondary); margin-bottom: 16px;
}
.about-lead strong { color: var(--text-primary); }
.about-text p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }
.about-interests h3 {
  font-size: 0.9rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--text-muted);
  margin: 28px 0 14px;
}
.interest-tags, .project-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 6px 14px; border-radius: var(--radius-full);
  font-size: 0.8rem; font-weight: 500;
  background: rgba(79,142,255,0.1);
  border: 1px solid rgba(79,142,255,0.2);
  color: var(--accent-blue);
  transition: all var(--transition);
}
.tag:hover { background: rgba(79,142,255,0.18); }

.about-info-card { padding: 28px; }
.info-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--surface-border);
  color: var(--accent-blue);
}
.info-item:last-child { border-bottom: none; padding-bottom: 0; }
.info-item svg { flex-shrink: 0; margin-top: 2px; }
.info-label { display: block; font-size: 0.75rem; color: var(--text-muted); font-weight: 500; margin-bottom: 2px; }
.info-value { display: block; font-size: 0.9rem; color: var(--text-primary); font-weight: 500; }

/* ═══════════════════════════════
   TIMELINE
   ═══════════════════════════════ */
.timeline {
  position: relative; max-width: 780px; margin: 0 auto;
  display: flex; flex-direction: column; gap: 32px;
}
.timeline::before {
  content: ''; position: absolute;
  left: 27px; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(to bottom, var(--accent-blue), var(--accent-purple));
  border-radius: 2px;
}
.timeline-item {
  display: grid; grid-template-columns: 56px 1fr; gap: 24px;
  align-items: start;
}
.timeline-icon {
  width: 56px; height: 56px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: #fff; flex-shrink: 0;
  box-shadow: 0 4px 20px rgba(79,142,255,0.4);
  position: relative; z-index: 1;
}
.timeline-content { padding: 24px; }
.timeline-meta {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 10px; flex-wrap: wrap;
}
.timeline-date { font-size: 0.8rem; color: var(--text-muted); font-family: var(--font-mono); }
.timeline-badge {
  font-size: 0.7rem; font-weight: 700; padding: 3px 10px;
  border-radius: var(--radius-full); text-transform: uppercase; letter-spacing: 0.08em;
}
.education-badge { background: rgba(79,142,255,0.15); color: var(--accent-blue); border: 1px solid rgba(79,142,255,0.2); }
.experience-badge { background: rgba(139,92,246,0.15); color: var(--accent-purple); border: 1px solid rgba(139,92,246,0.2); }
.timeline-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 4px; }
.timeline-subtitle { font-size: 0.875rem; color: var(--text-secondary); margin-bottom: 16px; }
.timeline-highlights { display: flex; flex-wrap: wrap; gap: 8px; }
.highlight-chip {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 0.78rem; font-weight: 500;
  padding: 4px 12px; border-radius: var(--radius-full);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--surface-border);
  color: var(--text-secondary);
}
.timeline-list {
  list-style: none; display: flex; flex-direction: column; gap: 6px;
}
.timeline-list li {
  font-size: 0.875rem; color: var(--text-secondary);
  display: flex; align-items: flex-start; gap: 10px;
}
.timeline-list li::before {
  content: '→'; color: var(--accent-blue);
  font-size: 0.9rem; flex-shrink: 0; margin-top: 1px;
}

/* ═══════════════════════════════
   SKILLS
   ═══════════════════════════════ */
.skills-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.skill-category { padding: 24px; }
.skill-cat-header {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 20px; padding-bottom: 16px;
  border-bottom: 1px solid var(--surface-border);
}
.skill-cat-icon {
  width: 38px; height: 38px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: #fff; flex-shrink: 0;
}
.skill-cat-header h3 { font-size: 0.9rem; font-weight: 700; }
.skill-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-pill {
  padding: 6px 14px; border-radius: var(--radius-full);
  font-size: 0.8rem; font-weight: 500;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--surface-border);
  color: var(--text-secondary);
  transition: all var(--transition);
}
.skill-pill:hover {
  border-color: rgba(79,142,255,0.4);
  color: var(--accent-blue);
  background: rgba(79,142,255,0.1);
}
.highlight-pill {
  background: rgba(79,142,255,0.12);
  border-color: rgba(79,142,255,0.3);
  color: var(--accent-blue);
}

/* ═══════════════════════════════
   PROJECTS
   ═══════════════════════════════ */
.projects-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}
.project-card {
  padding: 28px; position: relative; overflow: hidden;
  cursor: default;
}
.project-card::before {
  content: ''; position: absolute;
  inset: 0; border-radius: inherit;
  background: var(--gradient-glow);
  opacity: 0; transition: opacity var(--transition);
  pointer-events: none;
}
.project-card:hover::before { opacity: 1; }
.featured-project {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: 1fr auto;
  gap: 20px; align-items: start;
}
.featured-project .project-icon-wrap { grid-column: 1; }
.featured-project .project-title { grid-column: 1; font-size: 1.4rem; }
.featured-project .project-subtitle { grid-column: 1; }
.featured-project .project-desc { grid-column: 1; }
.featured-project .project-tags { grid-column: 1; }
.featured-project .project-header {
  grid-column: 1 / -1;
}

.project-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.project-number {
  font-size: 2rem; font-weight: 900;
  font-family: var(--font-mono);
  background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  opacity: 0.5; line-height: 1;
}
.project-links { display: flex; gap: 8px; }
.project-link {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--surface-border);
  color: var(--text-secondary);
  transition: all var(--transition);
}
.project-link:hover {
  color: var(--accent-blue);
  border-color: rgba(79,142,255,0.4);
  background: rgba(79,142,255,0.1);
}
.project-icon-wrap { margin-bottom: 16px; }
.project-icon-bg {
  width: 52px; height: 52px;
  background: rgba(79,142,255,0.12);
  border: 1px solid rgba(79,142,255,0.2);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-blue);
  transition: all var(--transition);
}
.project-card:hover .project-icon-bg {
  background: rgba(79,142,255,0.2);
  transform: scale(1.05);
}
.project-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.project-subtitle { font-size: 0.85rem; color: var(--accent-purple); font-weight: 600; margin-bottom: 12px; }
.project-desc { font-size: 0.875rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; }
.project-tag {
  padding: 4px 12px; border-radius: var(--radius-full);
  font-size: 0.75rem; font-weight: 600; font-family: var(--font-mono);
  background: rgba(139,92,246,0.1);
  border: 1px solid rgba(139,92,246,0.2);
  color: var(--accent-purple);
  transition: all var(--transition);
}
.project-tag:hover { background: rgba(139,92,246,0.2); }

/* ═══════════════════════════════
   ACHIEVEMENTS
   ═══════════════════════════════ */
.achievements-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.achievement-card {
  padding: 28px; text-align: center; position: relative; overflow: hidden;
}
.achievement-card::after {
  content: ''; position: absolute;
  bottom: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition);
}
.achievement-card:hover::after { transform: scaleX(1); }
.achievement-icon {
  width: 60px; height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: #fff; margin: 0 auto 18px;
  box-shadow: 0 4px 20px rgba(79,142,255,0.3);
  transition: all var(--transition-spring);
}
.achievement-card:hover .achievement-icon { transform: scale(1.1) rotate(-3deg); }
.achievement-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 10px; }
.achievement-card p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.65; }

/* ═══════════════════════════════
   CONTACT
   ═══════════════════════════════ */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px;
  align-items: start;
}
.contact-lead {
  font-size: 1.05rem; color: var(--text-secondary);
  line-height: 1.8; margin-bottom: 36px;
}
.contact-links { display: flex; flex-direction: column; gap: 12px; }
.contact-item {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px; border-radius: var(--radius-md);
  background: var(--surface-1);
  border: 1px solid var(--surface-border);
  transition: all var(--transition);
}
.contact-item:hover {
  border-color: rgba(79,142,255,0.35);
  background: rgba(79,142,255,0.06);
  transform: translateX(6px);
}
.contact-item-icon {
  width: 40px; height: 40px;
  background: rgba(79,142,255,0.12);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-blue); flex-shrink: 0;
}
.contact-item-label { display: block; font-size: 0.72rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 2px; }
.contact-item-value { display: block; font-size: 0.9rem; color: var(--text-primary); font-weight: 500; }

.cta-card {
  padding: 36px; text-align: center;
}
.cta-icon {
  width: 72px; height: 72px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  color: #fff; margin: 0 auto 20px;
  box-shadow: 0 8px 32px rgba(79,142,255,0.35);
  animation: floatOrbit 4s ease-in-out infinite;
}
.cta-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.cta-card p { font-size: 0.875rem; color: var(--text-secondary); margin-bottom: 24px; line-height: 1.7; }
.cta-card .btn { width: 100%; justify-content: center; }

/* ═══════════════════════════════
   FOOTER
   ═══════════════════════════════ */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--surface-border);
  background: var(--bg-primary);
}
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; }
.footer-logo { display: flex; align-items: center; gap: 4px; font-size: 1.3rem; font-weight: 800; background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.footer-copy { font-size: 0.875rem; color: var(--text-secondary); }
.footer-copy strong { color: var(--text-primary); }
.footer-sub { font-size: 0.78rem; color: var(--text-muted); }

/* ═══════════════════════════════
   RESPONSIVE
   ═══════════════════════════════ */
@media (max-width: 1024px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .achievements-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  .section { padding: 70px 0; }

  .hamburger { display: flex; }
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: rgba(6,6,9,0.95); backdrop-filter: blur(24px);
    flex-direction: column; gap: 0; padding: 16px;
    border-bottom: 1px solid var(--surface-border);
    transform: translateY(-110%); opacity: 0;
    transition: all var(--transition); pointer-events: none;
    margin-left: 0;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-link { display: block; padding: 14px 16px; border-radius: var(--radius-md); }
  .nav-resume { display: none; }

  .hero-grid { grid-template-columns: 1fr; padding: 60px 24px; gap: 48px; }
  .hero-visual { order: -1; }
  .profile-ring { width: 260px; height: 260px; }
  .profile-ring-inner { width: 200px; height: 200px; }

  .hero-name { font-size: clamp(2.2rem, 8vw, 3rem); }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-code-card { display: none; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .featured-project { grid-template-columns: 1fr; }
  .achievements-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }

  .timeline::before { left: 23px; }
  .timeline-item { grid-template-columns: 48px 1fr; gap: 16px; }
  .timeline-icon { width: 48px; height: 48px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .section-title { font-size: 1.8rem; }
}

/* ── SELECTION ── */
::selection { background: rgba(79,142,255,0.3); color: var(--text-primary); }

/* ── FOCUS VISIBLE ── */
:focus-visible {
  outline: 2px solid var(--accent-blue);
  outline-offset: 3px;
  border-radius: 4px;
}