/* ===========================
   CSS Custom Properties
   =========================== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --text-primary: #e8e8ed;
  --text-secondary: #9999a8;
  --text-muted: #666680;
  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.15);
  --accent-glow: rgba(0, 212, 170, 0.3);
  --accent-2: #00b4d8;
  --accent-3: #7b61ff;
  --accent-4: #ff6b9d;
  --accent-5: #ffd166;
  --accent-6: #06d6a0;
  --accent-7: #118ab2;
  --accent-rgb: 0, 212, 170;
  --accent-2-rgb: 0, 180, 216;
  --accent-3-rgb: 123, 97, 255;
  --accent-4-rgb: 255, 107, 157;
  --accent-5-rgb: 255, 209, 102;
  --accent-6-rgb: 6, 214, 160;
  --accent-7-rgb: 17, 138, 178;
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --nav-height: 70px;
}

/* ===========================
   Reset & Base
   =========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

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;
}

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

a:hover {
  color: var(--accent-2);
}

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.accent {
  color: var(--accent);
}

/* ===========================
   Skip Link (Accessibility)
   =========================== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 9999;
  padding: 12px 24px;
  background: var(--accent);
  color: var(--bg-primary);
  font-weight: 600;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.skip-link:focus {
  top: 12px;
  color: var(--bg-primary);
}

/* ===========================
   Focus Styles (Accessibility)
   =========================== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ===========================
   Navigation
   =========================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -1px;
}

.nav-logo:hover {
  color: var(--text-primary);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.5px;
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

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

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

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
  border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile nav overlay */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: min(82vw, 300px);
    height: 100vh;
    height: 100dvh;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 96px 30px 32px;
    gap: 24px;
    transform: translateX(100%);
    transition: transform var(--transition);
    border-left: 1px solid var(--border);
    z-index: 1000;
    overflow-y: auto;
    will-change: transform;
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-links a {
    font-size: 1.1rem;
  }
}

/* ===========================
   Hero
   =========================== */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
  will-change: transform;
  animation: float 12s ease-in-out infinite;
}

.glow-1 {
  width: 500px;
  height: 500px;
  background: var(--accent);
  top: -10%;
  left: -5%;
  animation-delay: 0s;
}

.glow-2 {
  width: 400px;
  height: 400px;
  background: var(--accent-3);
  bottom: -10%;
  right: -5%;
  animation-delay: -4s;
}

.glow-3 {
  width: 300px;
  height: 300px;
  background: var(--accent-2);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -8s;
  animation-name: float-center;
}

/* Floating particles */
.particle {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--size);
  height: var(--size);
  background: var(--accent);
  border-radius: 50%;
  opacity: 0;
  animation: particle-float var(--dur) ease-in-out infinite var(--delay);
}

@keyframes particle-float {
  0%, 100% {
    opacity: 0;
    transform: translateY(0) scale(0.5);
  }
  10% {
    opacity: 0.6;
  }
  50% {
    opacity: 0.3;
    transform: translateY(-80px) scale(1);
  }
  90% {
    opacity: 0.5;
  }
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}

@keyframes float-center {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  33% { transform: translate(-45%, -55%) scale(1.1); }
  66% { transform: translate(-55%, -45%) scale(0.9); }
}

.hero-content {
  position: relative;
  text-align: center;
  z-index: 1;
  padding: 0 24px;
}

.hero-photo-wrapper {
  position: relative;
  width: 170px;
  height: 170px;
  margin: 0 auto 36px;
}

.photo-ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: conic-gradient(from 0deg, var(--accent), var(--accent-3), var(--accent-2), var(--accent)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  animation: spin 6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hero-photo {
  width: 170px;
  height: 170px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--bg-primary);
}

.hero-name {
  font-size: clamp(2.4rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-tagline {
  font-size: clamp(0.85rem, 2vw, 1.1rem);
  color: var(--text-secondary);
  margin-bottom: 36px;
  font-weight: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.tagline-sep {
  color: var(--accent);
  font-weight: 300;
}

.cursor {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

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

.hero-links {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 56px;
}

.hero-links a,
.footer-links a {
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
  background: rgba(255, 255, 255, 0.03);
  backface-visibility: hidden;
}

.hero-links a {
  width: 50px;
  height: 50px;
  font-size: 1.25rem;
}

.footer-links a {
  width: 42px;
  height: 42px;
  font-size: 1rem;
}

.hero-links a:hover,
.footer-links a:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

.hero-links a:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 212, 170, 0.2);
}

/* Scroll indicator */
.scroll-indicator {
  margin-top: 16px;
  animation: bounce 2s ease-in-out infinite;
}

.mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  display: inline-block;
  position: relative;
}

.mouse-wheel {
  width: 4px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-wheel 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

@keyframes scroll-wheel {
  0% { opacity: 1; top: 8px; }
  100% { opacity: 0; top: 20px; }
}

/* ===========================
   Sections
   =========================== */
.section {
  padding: 120px 0;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 56px;
  letter-spacing: -0.5px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 2px;
}

.title-accent {
  font-family: var(--font-mono);
  font-weight: 400;
  margin-right: 10px;
  color: var(--accent);
}

/* ===========================
   About
   =========================== */
.about-content {
  max-width: 720px;
}

.about-text {
  font-size: 1.18rem;
  line-height: 1.85;
  color: var(--text-secondary);
  margin-bottom: 48px;
}

.about-text strong {
  color: var(--text-primary);
  font-weight: 600;
}

.about-stats {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 0;
}

.stat-item {
  text-align: center;
  flex: 1;
  min-width: 120px;
  padding: 0 24px;
}

.stat-divider {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, var(--border-hover), transparent);
}

.stat-number {
  display: block;
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--accent);
  font-family: var(--font-mono);
  line-height: 1;
  margin-bottom: 10px;
  text-shadow: 0 0 40px var(--accent-glow);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  font-weight: 600;
}

/* ===========================
   Skills
   =========================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.skill-category:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.skill-category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.skill-category-header i {
  font-size: 1.3rem;
  color: var(--accent);
  width: 40px;
  height: 40px;
  background: var(--accent-dim);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.skill-category-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tag {
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.skill-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ===========================
   Projects
   =========================== */
.section-projects {
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  --project-accent-rgb: var(--accent-rgb);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.4s ease, background var(--transition), transform 0.4s ease, box-shadow 0.4s ease;
  will-change: transform;
}

.project-card[data-accent="1"] { --project-accent-rgb: var(--accent-rgb); }
.project-card[data-accent="2"] { --project-accent-rgb: var(--accent-2-rgb); }
.project-card[data-accent="3"] { --project-accent-rgb: var(--accent-3-rgb); }
.project-card[data-accent="4"] { --project-accent-rgb: var(--accent-4-rgb); }
.project-card[data-accent="5"] { --project-accent-rgb: var(--accent-5-rgb); }
.project-card[data-accent="6"] { --project-accent-rgb: var(--accent-6-rgb); }
.project-card[data-accent="7"] { --project-accent-rgb: var(--accent-7-rgb); }

/* Colored glow behind card on hover */
.project-card-glow {
  position: absolute;
  inset: -1px;
  background: radial-gradient(520px circle at var(--glow-x, 50%) var(--glow-y, 50%), rgba(var(--project-accent-rgb), 0.18), transparent 62%);
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
  z-index: 0;
}

.project-card:hover .project-card-glow {
  opacity: 1;
}

/* Top accent bar — animated slide */
.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: rgb(var(--project-accent-rgb));
  transition: width 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 2;
}

/* Subtle sheen for a little polish */
.project-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 35%, rgba(255, 255, 255, 0.08) 50%, transparent 65%);
  transform: translateX(-120%) skewX(-18deg);
  opacity: 0;
  transition: transform 0.75s ease, opacity 0.4s ease;
  pointer-events: none;
  z-index: 0;
}

.project-card:hover::before {
  width: 100%;
}

.project-card:hover::after {
  transform: translateX(120%) skewX(-18deg);
  opacity: 1;
}

.project-card:hover {
  border-color: rgba(var(--project-accent-rgb), 0.3);
  background: var(--bg-card-hover);
  transform: translateY(-6px);
  box-shadow:
    0 24px 48px rgba(0, 0, 0, 0.4),
    0 0 40px rgba(var(--project-accent-rgb), 0.1);
}

.project-card > *:not(.project-card-glow) {
  position: relative;
  z-index: 1;
}

.project-icon {
  font-size: 2.8rem;
  margin-bottom: 16px;
  line-height: 1;
}

.project-badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: 0.3px;
}

.project-badge.gold {
  background: linear-gradient(135deg, rgba(255, 209, 102, 0.2), rgba(255, 166, 0, 0.15));
  color: var(--accent-5);
  border: 1px solid rgba(255, 209, 102, 0.2);
}

.project-badge.silver {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.project-name {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.project-award {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  font-weight: 500;
}

.project-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 20px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}

.project-tags span {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-weight: 500;
}

.project-links {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.project-btn {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
  white-space: nowrap;
}

.project-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-1px);
}

.project-btn i {
  font-size: 0.75rem;
}

.project-link-placeholder {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: italic;
  padding: 8px 0;
}

/* ===========================
   Experience (Timeline)
   =========================== */
.timeline {
  position: relative;
  padding-left: 48px;
  max-width: 800px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-3), var(--text-muted), transparent);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -44px;
  top: 28px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent);
  z-index: 1;
  transition: background var(--transition), box-shadow var(--transition);
}

.timeline-item:hover .timeline-dot {
  background: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

/* Pulsing dot for current positions */
.timeline-dot-ping {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  animation: ping 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

@keyframes ping {
  0% { transform: scale(1); opacity: 0.6; }
  75%, 100% { transform: scale(2.2); opacity: 0; }
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 24px 28px;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.timeline-item:hover .timeline-content {
  border-color: var(--border-hover);
  border-left-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}

.timeline-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.timeline-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.timeline-company {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
}

.timeline-badge-current {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid rgba(0, 212, 170, 0.2);
}

.timeline-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.timeline-meta span {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.timeline-meta i {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.timeline-content p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===========================
   Education
   =========================== */
.education-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.education-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  text-align: center;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.education-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}

.education-icon {
  font-size: 2.2rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.education-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.education-degree {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.education-year {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 20px;
  font-family: var(--font-mono);
}

.education-details {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}

.edu-badge {
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.edu-badge.highlight {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: rgba(0, 212, 170, 0.2);
}

/* ===========================
   Footer
   =========================== */
.footer {
  padding: 80px 0 48px;
  text-align: center;
  position: relative;
}

.footer-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-2), transparent);
  border-radius: 2px;
}

.footer-back-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 32px;
  transition: color var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
}

.footer-back-top:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-3px);
}

.footer-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 28px;
}

.footer-links a:hover {
  transform: translateY(-2px);
}

.footer-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ===========================
   Reveal Animations
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children in grids */
.skills-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.skills-grid .reveal:nth-child(3) { transition-delay: 0.2s; }
.skills-grid .reveal:nth-child(4) { transition-delay: 0.3s; }
.skills-grid .reveal:nth-child(5) { transition-delay: 0.4s; }

.projects-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.projects-grid .reveal:nth-child(3) { transition-delay: 0.15s; }
.projects-grid .reveal:nth-child(4) { transition-delay: 0.2s; }
.projects-grid .reveal:nth-child(5) { transition-delay: 0.25s; }
.projects-grid .reveal:nth-child(6) { transition-delay: 0.3s; }
.projects-grid .reveal:nth-child(7) { transition-delay: 0.35s; }

.timeline .reveal:nth-child(2) { transition-delay: 0.1s; }
.timeline .reveal:nth-child(3) { transition-delay: 0.2s; }
.timeline .reveal:nth-child(4) { transition-delay: 0.3s; }
.timeline .reveal:nth-child(5) { transition-delay: 0.4s; }

/* ===========================
   Reduced Motion
   =========================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (hover: none) {
  .project-card:hover,
  .skill-category:hover,
  .education-card:hover {
    transform: none;
    box-shadow: none;
  }

  .project-card:hover .project-card-glow,
  .project-card:hover::after {
    opacity: 0;
  }

  .timeline-item:hover .timeline-content,
  .hero-links a:hover,
  .footer-links a:hover,
  .project-btn:hover,
  .footer-back-top:hover {
    transform: none;
    box-shadow: none;
  }
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
  .section {
    padding: 80px 0;
  }

  .section-title {
    margin-bottom: 42px;
  }

  .about-text {
    font-size: 1.05rem;
    line-height: 1.75;
    margin-bottom: 36px;
  }

  .hero-photo-wrapper {
    width: 140px;
    height: 140px;
  }

  .hero-photo {
    width: 140px;
    height: 140px;
  }

  .about-stats {
    flex-direction: column;
    padding: 24px 0;
    gap: 20px;
  }

  .stat-divider {
    width: 48px;
    height: 1px;
    margin: 0 auto;
    background: linear-gradient(90deg, transparent, var(--border-hover), transparent);
  }

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

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

  .project-links {
    gap: 10px;
  }

  .project-btn {
    justify-content: center;
  }

  .timeline {
    padding-left: 36px;
  }

  .timeline-dot {
    left: -32px;
    width: 13px;
    height: 13px;
    top: 26px;
  }

  .timeline::before {
    left: 8px;
  }

  .timeline-header {
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
  }

  .timeline-content {
    padding: 20px 22px;
  }

  .timeline-meta {
    gap: 12px;
  }

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

  /* Reduce glow sizes on mobile for performance */
  .glow {
    filter: blur(80px);
    opacity: 0.25;
  }

  .glow-1 { width: 300px; height: 300px; }
  .glow-2 { width: 250px; height: 250px; }
  .glow-3 { width: 200px; height: 200px; }

  .particle {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-links {
    gap: 12px;
    margin-bottom: 46px;
  }

  .hero-links a {
    width: 46px;
    height: 46px;
    font-size: 1.1rem;
  }

  .hero-tagline {
    flex-direction: column;
    gap: 4px;
  }

  .tagline-sep {
    display: none;
  }

  .cursor {
    display: none;
  }

  .project-card {
    padding: 24px;
  }

  .project-btn {
    width: 100%;
  }

  .timeline {
    padding-left: 30px;
  }

  .timeline::before {
    left: 6px;
  }

  .timeline-dot {
    left: -26px;
  }

  .timeline-content {
    padding: 18px;
  }
}

/* Selection color */
::selection {
  background: var(--accent);
  color: var(--bg-primary);
}

::-moz-selection {
  background: var(--accent);
  color: var(--bg-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}