/* === CSS Custom Properties === */
:root {
  --bg: #0b1121;
  --bg-alt: #111827;
  --surface: rgba(30, 41, 59, 0.6);
  --surface-hover: rgba(51, 65, 85, 0.7);
  --border: rgba(148, 163, 184, 0.1);
  --border-hover: rgba(148, 163, 184, 0.2);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent: #818cf8;
  --accent-2: #a78bfa;
  --accent-3: #22d3ee;
  --gradient: linear-gradient(135deg, #818cf8 0%, #a78bfa 40%, #22d3ee 100%);
  --gradient-2: linear-gradient(135deg, #22d3ee 0%, #818cf8 60%, #a78bfa 100%);
  --glow: 0 0 40px rgba(129, 140, 248, 0.12);
  --glow-strong: 0 0 60px rgba(129, 140, 248, 0.2);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* === Ambient Aurora Background === */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(129, 140, 248, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 60%, rgba(167, 139, 250, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 90%, rgba(34, 211, 238, 0.05) 0%, transparent 60%);
  animation: aurora-drift 20s ease-in-out infinite alternate;
}

@keyframes aurora-drift {
  0% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
  100% { opacity: 0.7; transform: scale(1.02); }
}

/* === Particle Canvas === */
#particles {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.6;
}

/* === Cursor Glow === */
.cursor-glow {
  position: fixed;
  width: 700px; height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(129,140,248,0.07) 0%, rgba(34,211,238,0.03) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: transform 0.9s ease-out;
}

/* === Navigation === */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(11, 17, 33, 0.8);
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
  padding: 10px 0;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo .logo-img {
  height: 52px;
  width: auto;
  vertical-align: middle;
  transition: var(--transition);
}

.nav-logo .logo-img:hover {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  gap: 4px;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 10px;
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--gradient);
  border-radius: 2px;
  transition: transform 0.3s ease;
}

.nav-links a:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.nav-links a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* === Hero === */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 24px 80px;
}

.hero-grid {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(129, 140, 248, 0.08);
  border: 1px solid rgba(129, 140, 248, 0.2);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
  animation: badge-glow 3s ease-in-out infinite;
}

@keyframes badge-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(129, 140, 248, 0.15); }
  50% { box-shadow: 0 0 0 12px rgba(129, 140, 248, 0); }
}

.pulse-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: #34d399;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.6); }
  50% { box-shadow: 0 0 0 10px rgba(52, 211, 153, 0); }
}

.hero h1 {
  font-size: clamp(3rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  color: #f1f5f9;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% 200%;
  animation: gradient-shift 4s ease-in-out infinite;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 1.5vw, 1.15rem);
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 30px;
  font-weight: 500;
}

.typewriter::after {
  content: '|';
  animation: blink 0.8s step-end infinite;
  color: var(--accent);
  font-weight: 700;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.75;
  margin-bottom: 32px;
}

.hero-desc strong {
  color: var(--text);
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity 0.3s;
}

.btn:hover::after { opacity: 1; }

.btn-primary {
  background: var(--gradient);
  background-size: 200% 200%;
  animation: gradient-shift 4s ease-in-out infinite;
  color: #fff;
  box-shadow: 0 8px 32px rgba(129, 140, 248, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(129, 140, 248, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: var(--surface-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}

/* === Hero Stats === */
.hero-stats {
  display: flex;
  gap: 36px;
}

.stat {
  text-align: center;
}

.stat-num {
  font-size: 2.5rem;
  font-weight: 900;
  background: var(--gradient);
  background-size: 200% 200%;
  animation: gradient-shift 4s ease-in-out infinite;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline;
}

.stat-plus {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent-2);
}

.stat-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

/* === Hero Visual (Photo) === */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.photo-frame {
  position: relative;
  width: 300px;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 32px;
}

.photo-ring {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--gradient) border-box;
  background-size: 200% 200%;
  animation: ring-rotate 8s linear infinite, gradient-shift 4s ease-in-out infinite;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

.ring-2 {
  inset: -20px;
  animation-duration: 14s;
  animation-direction: reverse;
  opacity: 0.4;
}

@keyframes ring-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.profile-photo {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(148, 163, 184, 0.2);
  box-shadow: var(--glow-strong);
  z-index: 2;
  transition: var(--transition);
}

.profile-photo:hover {
  transform: scale(1.04);
  box-shadow: 0 0 80px rgba(129, 140, 248, 0.3);
}

.photo-placeholder {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  font-weight: 900;
  color: #fff;
  border: 3px solid rgba(148, 163, 184, 0.2);
  box-shadow: var(--glow-strong);
  z-index: 2;
}

/* === Floating Tech Badges === */
.floating-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tech-badge {
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.82rem;
  color: var(--text-muted);
  backdrop-filter: blur(10px);
  animation: float-badge 4s ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}

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

/* === Scroll Indicator === */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  animation: fade-in-up 1s 1.5s both;
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.mouse {
  width: 26px;
  height: 40px;
  border: 2px solid var(--border-hover);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}

.mouse-wheel {
  width: 4px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  animation: scroll-wheel 2s ease-in-out infinite;
}

@keyframes scroll-wheel {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

/* === Sections === */
.section {
  position: relative;
  z-index: 1;
  padding: 100px 24px;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  padding: 6px 14px;
  border: 1px solid rgba(129, 140, 248, 0.2);
  border-radius: 6px;
  background: rgba(129, 140, 248, 0.05);
}

.section-header h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: #f1f5f9;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* === About === */
.about-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
}

.about-text p {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 20px;
  line-height: 1.8;
}

.about-text p strong {
  color: var(--text);
}

.about-cards {
  display: grid;
  gap: 12px;
}

.info-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition);
}

.info-card:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: translateX(6px);
  box-shadow: 0 4px 20px rgba(129, 140, 248, 0.08);
}

.info-icon {
  font-size: 1.5rem;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(129, 140, 248, 0.1);
  border-radius: 12px;
  flex-shrink: 0;
}

.info-content {
  display: flex;
  flex-direction: column;
}

.info-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.info-content a, .info-content span {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

.info-content a:hover {
  color: var(--accent);
}

/* === Timeline === */
.timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), var(--accent-2), var(--accent-3), var(--accent));
}

.timeline-item {
  position: relative;
  margin-bottom: 36px;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateX(0);
}

.timeline-dot {
  position: absolute;
  left: -37px;
  top: 28px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--gradient);
  border: 3px solid var(--bg);
  box-shadow: 0 0 16px rgba(129, 140, 248, 0.4);
  z-index: 2;
}

.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition);
}

.timeline-card:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  box-shadow: 0 8px 30px rgba(129, 140, 248, 0.06);
}

.timeline-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  flex-wrap: wrap;
  gap: 10px;
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 500;
}

.timeline-badge {
  font-size: 0.72rem;
  padding: 4px 12px;
  border-radius: 50px;
  font-weight: 600;
  background: rgba(52, 211, 153, 0.12);
  color: #34d399;
  border: 1px solid rgba(52, 211, 153, 0.2);
}

.timeline-badge.concurrent {
  background: rgba(34, 211, 238, 0.12);
  color: #22d3ee;
  border-color: rgba(34, 211, 238, 0.2);
}

.timeline-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: #f1f5f9;
}

.timeline-company {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 16px;
  font-weight: 500;
}

.timeline-body ul {
  list-style: none;
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.timeline-body li {
  position: relative;
  padding-left: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.timeline-body li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.6;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.timeline-tags span {
  padding: 4px 10px;
  background: rgba(129, 140, 248, 0.08);
  border: 1px solid rgba(129, 140, 248, 0.15);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* === Skills === */
.skills-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.skill-category {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition);
}

.skill-category:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(129, 140, 248, 0.06);
}

.skill-category h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #f1f5f9;
}

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

.skill-tags span {
  padding: 6px 14px;
  background: rgba(129, 140, 248, 0.06);
  border: 1px solid rgba(129, 140, 248, 0.12);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.skill-tags span:hover {
  background: rgba(129, 140, 248, 0.16);
  border-color: var(--accent);
  color: var(--text);
  transform: translateY(-2px);
}

/* === Certifications === */
.certs-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.cert-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition);
}

.cert-card:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(129, 140, 248, 0.1);
}

.cert-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.cert-card h3 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: #f1f5f9;
  line-height: 1.3;
}

.cert-card p {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.education-card {
  border-color: rgba(167, 139, 250, 0.2);
}

.education-card:hover {
  border-color: rgba(167, 139, 250, 0.5);
}

/* === Contact === */
.contact-grid {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: var(--transition);
}

.contact-card:hover {
  border-color: var(--accent);
  background: var(--surface-hover);
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(129, 140, 248, 0.08);
}

.contact-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.contact-card h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.contact-card a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.88rem;
  transition: var(--transition);
}

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

/* === Footer === */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 48px 24px;
  background: rgba(11, 17, 33, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-logo .logo-img {
  height: 44px;
  width: auto;
  vertical-align: middle;
  opacity: 0.9;
  transition: var(--transition);
}

.footer-logo .logo-img:hover {
  opacity: 1;
}

.footer p {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.85rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
}

/* === Back to Top === */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 1.3rem;
  cursor: pointer;
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(129, 140, 248, 0.3);
}

/* === Reveal Animations === */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* === Responsive === */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-desc { margin: 0 auto 32px; }
  .hero-cta { justify-content: center; }
  .hero-stats { justify-content: center; }
  .about-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .certs-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .timeline { padding-left: 28px; }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 16px;
    right: 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
  }
  .hero-stats { gap: 20px; }
  .stat-num { font-size: 2rem; }
  .certs-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .photo-frame { width: 240px; height: 240px; }
  .profile-photo, .photo-placeholder { width: 220px; height: 220px; }
  .footer-inner { flex-direction: column; text-align: center; }
  .hero h1 { font-size: 2.5rem; }
  .section { padding: 60px 16px; }
  .hero { padding: 100px 16px 60px; }
}

@media (max-width: 400px) {
  .certs-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: center; }
  .hero-stats { flex-direction: column; align-items: center; gap: 16px; }
}