/* ============================================
   AMARNATH D.J. PORTFOLIO — STYLE SYSTEM
   ============================================ */

/* ---------- RESET & BASE ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-0: #050508;
  --bg-1: #0b0b12;
  --bg-2: #11111e;
  --bg-card: #13131f;
  --bg-card-hover: #1a1a2e;
  --border: rgba(255,255,255,0.07);
  --border-hover: rgba(139,92,246,0.4);

  --accent: #8b5cf6;
  --accent-2: #6366f1;
  --accent-3: #a78bfa;
  --accent-glow: rgba(139,92,246,0.25);
  --cyan: #22d3ee;
  --pink: #ec4899;

  --text-primary: #f1f0ff;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.5), 0 1px 3px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 40px rgba(139,92,246,0.15);

  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 0.6s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

/* ---------- SCROLLBAR ---------- */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-1); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 99px; }

/* ---------- CONTAINER ---------- */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   NAVBAR
   ============================================ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: background var(--transition), backdrop-filter var(--transition), box-shadow var(--transition);
}
#navbar.scrolled {
  background: rgba(5,5,8,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}
.nav-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}
.logo-bracket { color: var(--accent); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  margin-left: auto;
}
.nav-links a {
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
.nav-links a.active { color: var(--accent); }

.nav-cta {
  padding: 8px 20px;
  background: var(--accent);
  border-radius: 99px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-cta:hover {
  background: var(--accent-3);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   HERO
   ============================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: drift 8s ease-in-out infinite;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(139,92,246,0.5) 0%, transparent 70%);
  top: -150px; left: -100px;
  animation-duration: 10s;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(99,102,241,0.4) 0%, transparent 70%);
  bottom: -100px; right: -100px;
  animation-duration: 13s; animation-delay: -3s;
}
.orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(236,72,153,0.25) 0%, transparent 70%);
  top: 40%; right: 20%;
  animation-duration: 9s; animation-delay: -6s;
}
@keyframes drift {
  0%, 100% { transform: translate(0,0) scale(1); }
  33%       { transform: translate(30px,-20px) scale(1.05); }
  66%       { transform: translate(-20px, 15px) scale(0.97); }
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  max-width: 800px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(139,92,246,0.12);
  border: 1px solid rgba(139,92,246,0.3);
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-3);
  letter-spacing: 0.02em;
}
.badge-dot {
  width: 7px; height: 7px;
  background: #22c55e;
  border-radius: 50%;
  box-shadow: 0 0 8px #22c55e;
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(1.3); }
}
.hero-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.hero-name {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(135deg, #fff 0%, var(--accent-3) 50%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  font-weight: 500;
  color: var(--accent);
  min-height: 2rem;
}
.hero-role::after {
  content: '|';
  animation: blink 1s step-start infinite;
  margin-left: 2px;
}
@keyframes blink { 0%,100% { opacity:1 } 50% { opacity:0 } }

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.6;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
.hero-socials {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}
.social-link {
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
  background: rgba(255,255,255,0.03);
}
.social-link svg { width: 18px; height: 18px; }
.social-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-3px);
}
.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  animation: fadeInUp 2s ease forwards 1s;
  opacity: 0;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}
@keyframes scroll-line { 0%,100% { transform: scaleY(1); } 50% { transform: scaleY(0.6); } }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 99px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 4px 20px rgba(139,92,246,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(139,92,246,0.5);
}
.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.09);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-large { padding: 14px 36px; font-size: 1rem; }

/* ============================================
   SECTIONS — SHARED
   ============================================ */
section { padding: 100px 0; }

.section-header {
  margin-bottom: 56px;
}
.section-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-primary);
}

/* ============================================
   ABOUT
   ============================================ */
#about { background: var(--bg-1); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 64px;
  align-items: start;
}
.about-text p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 18px;
  font-size: 1rem;
}
.about-text p strong { color: var(--text-primary); }
.about-lead {
  font-size: 1.08rem !important;
  color: var(--text-primary) !important;
}
.about-stats {
  display: flex;
  gap: 16px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.stat-card {
  flex: 1;
  min-width: 90px;
  padding: 20px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-3), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.about-card-inner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  position: sticky;
  top: 100px;
}
.about-avatar {
  width: 100px; height: 100px;
  margin: 0 auto 24px;
  position: relative;
  display: flex; align-items: center; justify-content: center;
}
.avatar-ring {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: conic-gradient(var(--accent), var(--cyan), var(--pink), var(--accent));
  animation: spin 4s linear infinite;
  z-index: 0;
}
.avatar-initials {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  background: var(--bg-2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  border: 3px solid var(--bg-card);
}
@keyframes spin { to { transform: rotate(360deg); } }

.about-info-list { display: flex; flex-direction: column; gap: 12px; }
.info-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.info-item:last-child { border-bottom: none; }
.info-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  min-width: 70px;
  padding-top: 2px;
}
.info-value {
  font-size: 0.88rem;
  color: var(--text-secondary);
  flex: 1;
}

/* ============================================
   SKILLS
   ============================================ */
#skills { background: var(--bg-0); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}
.skill-category {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
}
.skill-category:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}
.skill-cat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.skill-cat-icon { font-size: 1.4rem; }
.skill-cat-header h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.skill-tag {
  padding: 5px 12px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.skill-tag:hover { border-color: var(--accent); color: var(--accent); }
.skill-tag.highlight {
  background: rgba(139,92,246,0.1);
  border-color: rgba(139,92,246,0.3);
  color: var(--accent-3);
}

/* ============================================
   PROJECTS
   ============================================ */
#projects { background: var(--bg-1); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.project-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--cyan));
  opacity: 0;
  transition: opacity var(--transition);
}
.project-card:hover::before { opacity: 1; }
.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card), 0 8px 40px rgba(139,92,246,0.2);
  background: var(--bg-card-hover);
}
.project-card.featured {
  border-color: rgba(139,92,246,0.2);
  background: linear-gradient(160deg, rgba(139,92,246,0.06) 0%, var(--bg-card) 60%);
}
.project-card.featured::before { opacity: 0.7; }
.project-card.in-progress {
  border-color: rgba(34,211,238,0.2);
  background: linear-gradient(160deg, rgba(34,211,238,0.04) 0%, var(--bg-card) 60%);
}
.project-card.in-progress::before {
  background: linear-gradient(90deg, var(--cyan), var(--pink));
  opacity: 0.5;
}

.project-card-inner { padding: 28px; }
.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}
.project-icon { font-size: 2rem; }
.project-links { display: flex; gap: 8px; }
.project-link {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  transition: var(--transition);
  background: rgba(255,255,255,0.03);
}
.project-link svg { width: 16px; height: 16px; }
.project-link:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-glow); }

.project-title {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.3;
}
.project-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
}
.project-desc strong { color: var(--text-primary); }

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.project-tags span {
  padding: 3px 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.project-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 3px 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 99px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #fff;
}
.in-progress-badge {
  background: linear-gradient(135deg, var(--cyan), #0ea5e9) !important;
}

/* ============================================
   CERTIFICATIONS & EDUCATION
   ============================================ */
#certifications { background: var(--bg-0); }

.timeline-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 64px;
}
.timeline-col-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.timeline { position: relative; }
.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}
.timeline-item {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.timeline-item.visible { opacity: 1; transform: translateX(0); }
.timeline-dot {
  width: 15px; height: 15px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg-0);
  flex-shrink: 0;
  margin-top: 4px;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 12px rgba(139,92,246,0.4);
}
.timeline-dot.accent {
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(34,211,238,0.4);
}
.timeline-content { flex: 1; }
.timeline-period {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 4px;
}
.timeline-dot.accent + .timeline-content .timeline-period { color: var(--cyan); }
.timeline-content h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.timeline-content p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Achievements */
.achievements-strip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.achievements-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
}
.achievements-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.achievement-card {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  min-width: 240px;
  padding: 16px 20px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.achievement-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
}
.ach-trophy { font-size: 1.8rem; }
.achievement-card strong {
  display: block;
  font-size: 0.875rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 2px;
}
.achievement-card span {
  font-size: 0.78rem;
  color: var(--accent-3);
  font-weight: 500;
}

/* ============================================
   CONTACT
   ============================================ */
#contact {
  background: var(--bg-1);
}
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.contact-text p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}
.contact-text p strong { color: var(--text-primary); }
.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
  color: var(--text-secondary);
  font-size: 0.9rem;
}
.contact-item:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  transform: translateX(6px);
  background: var(--bg-card-hover);
}
.contact-item-icon { font-size: 1.1rem; }

.contact-cta-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
}
.contact-cta-box::before {
  content: '';
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--cyan), var(--pink));
}
.contact-cta-box p {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ============================================
   FOOTER
   ============================================ */
#footer {
  background: var(--bg-0);
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
}
.footer-text {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-socials { display: flex; gap: 12px; }
.footer-socials a {
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-muted);
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.footer-socials a:hover { color: var(--accent); border-color: var(--accent); }

/* ============================================
   ANIMATIONS — FADE IN
   ============================================ */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-card { order: -1; }
  .about-card-inner { position: static; }
  .timeline-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-wrapper { grid-template-columns: 1fr; gap: 40px; }
  .projects-grid { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(5,5,8,0.97);
    backdrop-filter: blur(20px);
    justify-content: center;
    align-items: center;
    gap: 0;
    z-index: 999;
  }
  .nav-links.open li { width: 100%; text-align: center; }
  .nav-links.open a {
    display: block;
    padding: 18px;
    font-size: 1.2rem;
    color: var(--text-primary);
  }
  section { padding: 72px 0; }
  .skills-grid { grid-template-columns: 1fr; }
  .achievements-cards { flex-direction: column; }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .about-stats { gap: 10px; }
}