/* ========================================
   Ranjan Choubey — Portfolio v2
   Modern, animated, premium design
   ======================================== */

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

/* ---------- Root Variables ---------- */
:root {
  --primary: #3b82f6;
  --primary-dark: #2563eb;
  --accent: #06b6d4;
  --accent-2: #8b5cf6;
  --accent-warm: #f59e0b;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --dark-3: #0b1120;
  --gray: #64748b;
  --gray-light: #94a3b8;
  --light: #f8fafc;
  --light-2: #f1f5f9;
  --white: #ffffff;
  --border: #e2e8f0;
  --gradient: linear-gradient(135deg, #3b82f6 0%, #06b6d4 100%);
  --gradient-warm: linear-gradient(135deg, #8b5cf6 0%, #06b6d4 100%);
  --gradient-hero: linear-gradient(135deg, #60a5fa 0%, #38bdf8 40%, #22d3ee 100%);
  --gradient-dark: linear-gradient(135deg, #0b1120 0%, #162032 50%, #0f172a 100%);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --shadow-glow: 0 0 40px rgba(37, 99, 235, 0.15);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Smooth Scroll ---------- */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 2em;
}

/* ---------- Global Typography ---------- */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: #334155;
  line-height: 1.7;
  background: var(--white);
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  color: var(--dark);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.3;
}

a {
  transition: var(--transition);
}

/* ---------- Scroll Animations ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* staggered children */
.stagger > .fade-up:nth-child(1) { transition-delay: 0s; }
.stagger > .fade-up:nth-child(2) { transition-delay: 0.1s; }
.stagger > .fade-up:nth-child(3) { transition-delay: 0.2s; }
.stagger > .fade-up:nth-child(4) { transition-delay: 0.3s; }
.stagger > .fade-up:nth-child(5) { transition-delay: 0.4s; }
.stagger > .fade-up:nth-child(6) { transition-delay: 0.5s; }
.stagger > .fade-up:nth-child(7) { transition-delay: 0.6s; }

/* ============================================================
   HEADER / HERO
   ============================================================ */
#header {
  background: var(--gradient-dark) !important;
  padding: 2.5em 0 5em !important;
  position: relative;
  overflow: hidden;
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Animated background orbs */
#header::before,
#header::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  z-index: 0;
}

#header::before {
  width: 600px;
  height: 600px;
  background: rgba(37, 99, 235, 0.12);
  top: -200px;
  left: -100px;
  animation: orb1 15s ease-in-out infinite;
}

#header::after {
  width: 500px;
  height: 500px;
  background: rgba(6, 182, 212, 0.08);
  bottom: -150px;
  right: -100px;
  animation: orb2 18s ease-in-out infinite;
}

@keyframes orb1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(60px, 40px) scale(1.1); }
  66% { transform: translate(-30px, 60px) scale(0.95); }
}

@keyframes orb2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-50px, -30px) scale(1.05); }
  66% { transform: translate(40px, -50px) scale(0.9); }
}

/* Dot grid pattern overlay */
.hero-pattern {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 30px 30px;
  z-index: 0;
}

#header .inner {
  position: relative;
  z-index: 1;
}

/* Hero icon */
.hero-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient);
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5em;
  font-size: 1.8em;
  color: white;
  box-shadow: 0 10px 40px rgba(37, 99, 235, 0.35);
  animation: heroIconPulse 3s ease-in-out infinite;
}

@keyframes heroIconPulse {
  0%, 100% { box-shadow: 0 10px 40px rgba(37, 99, 235, 0.35); }
  50% { box-shadow: 0 10px 60px rgba(37, 99, 235, 0.5); }
}

#header h1 {
  color: var(--white) !important;
  font-size: 3.2em;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 0.3em;
  line-height: 1.15;
}

#header h1 strong {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#header .hero-subtitle {
  color: #b4c6db;
  font-size: 1.2em;
  font-weight: 400;
  max-width: 550px;
  margin: 0 auto 2em;
  line-height: 1.6;
}

/* Hero CTA buttons */
.hero-cta {
  display: flex;
  gap: 1em;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.5em;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.85em 1.8em;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92em;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.45);
}

.btn-ghost {
  background: rgba(255,255,255,0.06);
  color: #cbd5e1;
  border: 1px solid rgba(255,255,255,0.12);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  color: var(--white);
  border-color: rgba(255,255,255,0.25);
  transform: translateY(-3px);
}

/* Nav bar */
#header nav {
  position: relative;
  z-index: 1;
  padding-top: 1em;
}

.nav-inner {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.3em;
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 14px;
  padding: 0.5em;
  max-width: 600px;
  margin: 0 auto;
}

.nav-link {
  color: #94a3b8 !important;
  text-decoration: none !important;
  padding: 0.45em 0.9em;
  border-radius: 10px;
  font-size: 0.82em;
  font-weight: 500;
  transition: var(--transition);
  display: inline-block;
  border: none !important;
  background: transparent;
}

.nav-link:hover {
  color: var(--white) !important;
  background: rgba(255,255,255,0.08);
}

/* ============================================================
   SECTION BASE
   ============================================================ */
.section {
  padding: 6em 0;
  position: relative;
}

.section-light {
  background: var(--white);
}

.section-gray {
  background: var(--light);
}

.section-dark {
  background: var(--gradient-dark);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.section-dark::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 24px 24px;
}

.section-dark h2,
.section-dark h3 {
  color: var(--white);
}

.section-dark .section-subtitle {
  color: #94a3b8;
}

/* Section header */
.section-header {
  margin-bottom: 3em;
}

.section-label {
  display: inline-block;
  font-size: 0.78em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary);
  background: linear-gradient(135deg, rgba(59,130,246,0.1), rgba(6,182,212,0.1));
  padding: 0.4em 1em;
  border-radius: 20px;
  margin-bottom: 0.8em;
}

.section-dark .section-label {
  color: var(--accent);
  background: rgba(6, 182, 212, 0.1);
}

.section-title {
  font-size: 2.2em;
  margin-bottom: 0.4em;
  position: relative;
}

.section-subtitle {
  color: var(--gray);
  font-size: 1.05em;
  max-width: 500px;
}

/* ---------- Container ---------- */
.container-custom {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 2em;
}

/* ============================================================
   ABOUT ME
   ============================================================ */
.about-content {
  display: flex;
  gap: 3em;
  align-items: flex-start;
}

.about-photo-wrapper {
  flex-shrink: 0;
  position: relative;
}

.about-photo-wrapper::before {
  content: '';
  position: absolute;
  inset: -5px;
  background: var(--gradient);
  border-radius: 24px;
  z-index: 0;
  opacity: 0.6;
}

.about-photo {
  width: 190px;
  height: 190px;
  border-radius: 22px;
  object-fit: cover;
  position: relative;
  z-index: 1;
  border: 4px solid var(--white);
  box-shadow: var(--shadow-lg);
}

.about-text p {
  margin-bottom: 1em;
  font-size: 1.05em;
  color: #475569;
  line-height: 1.8;
}

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

/* Stat highlights */
.about-highlights {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1em;
  margin-top: 2.5em;
}

.highlight-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5em 1em;
  text-align: center;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.highlight-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient);
  opacity: 0;
  transition: var(--transition);
}

.highlight-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

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

.highlight-card .num {
  font-size: 2em;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  line-height: 1.2;
}

.highlight-card:nth-child(2) .num {
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  -webkit-background-clip: text;
  background-clip: text;
}

.highlight-card:nth-child(3) .num {
  background: linear-gradient(135deg, #10b981, #34d399);
  -webkit-background-clip: text;
  background-clip: text;
}

.highlight-card:nth-child(4) .num {
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  background-clip: text;
}

.highlight-card .label {
  font-size: 0.78em;
  color: var(--gray);
  margin-top: 0.3em;
  display: block;
  font-weight: 500;
}

/* ============================================================
   EXPERIENCE TIMELINE
   ============================================================ */
.timeline {
  position: relative;
  padding-left: 2.5em;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--accent), var(--accent-2));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 3em;
  padding: 1.8em;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.timeline-item:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.85em;
  top: 2em;
  width: 16px;
  height: 16px;
  background: var(--white);
  border: 3px solid var(--primary);
  border-radius: 50%;
  z-index: 1;
  transition: var(--transition);
}

.timeline-item:first-child::before {
  background: #10b981;
  box-shadow: 0 0 0 5px rgba(16, 185, 129, 0.2);
  width: 18px;
  height: 18px;
  left: -2.9em;
}

/* connector line from dot to card */
.timeline-item::after {
  content: '';
  position: absolute;
  left: -1.1em;
  top: 2.4em;
  width: 1.1em;
  height: 2px;
  background: var(--border);
}

.timeline-header {
  display: flex;
  align-items: center;
  gap: 0.8em;
  margin-bottom: 0.2em;
  flex-wrap: wrap;
}

.timeline-role {
  font-size: 1.15em;
  font-weight: 700;
  color: var(--dark);
}

.timeline-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gray-light);
  flex-shrink: 0;
}

.timeline-company {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
  font-size: 1em;
}

.timeline-company:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.timeline-date {
  display: inline-block;
  font-size: 0.8em;
  color: var(--gray);
  font-weight: 500;
  background: var(--light);
  padding: 0.2em 0.7em;
  border-radius: 20px;
  margin-top: 0.3em;
  margin-bottom: 0.4em;
}

.timeline-client {
  font-size: 0.88em;
  color: var(--gray);
  font-style: italic;
  margin-bottom: 0.8em;
  padding-bottom: 0.8em;
  border-bottom: 1px solid var(--light-2);
}

.timeline-bullets {
  list-style: none;
  padding: 0;
  margin: 0;
}

.timeline-bullets li {
  position: relative;
  padding-left: 1.5em;
  margin-bottom: 0.6em;
  font-size: 0.93em;
  color: #475569;
  line-height: 1.65;
}

.timeline-bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ============================================================
   EDUCATION
   ============================================================ */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5em;
}

.edu-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 2em;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.edu-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.edu-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.edu-card:hover::before {
  transform: scaleX(1);
}

.edu-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37,99,235,0.08), rgba(6,182,212,0.08));
  color: var(--primary);
  margin-bottom: 1em;
  font-size: 1.1em;
}

.edu-degree {
  font-size: 1.12em;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.2em;
}

.edu-school {
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95em;
}

.edu-school:hover {
  text-decoration: underline;
}

.edu-year {
  font-size: 0.82em;
  color: var(--gray);
  margin: 0.4em 0 0.8em;
  display: block;
}

.edu-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em;
}

.edu-badge {
  display: inline-block;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(251, 191, 36, 0.08));
  color: #b45309;
  padding: 0.35em 0.85em;
  border-radius: 20px;
  font-size: 0.78em;
  font-weight: 600;
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1em;
  position: relative;
  z-index: 1;
}

.skill-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  padding: 1.5em;
  transition: var(--transition);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.skill-card:hover {
  transform: translateY(-4px);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.15);
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.skill-category {
  font-size: 0.72em;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.8em;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35em;
}

.skill-tag {
  background: rgba(255,255,255,0.08);
  color: #e2e8f0;
  padding: 0.35em 0.75em;
  border-radius: 8px;
  font-size: 0.84em;
  font-weight: 500;
  border: 1px solid rgba(255,255,255,0.08);
  transition: var(--transition);
}

.skill-tag:hover {
  background: rgba(59, 130, 246, 0.2);
  border-color: rgba(59, 130, 246, 0.3);
  color: #fff;
}

/* ============================================================
   FEATURED WORK
   ============================================================ */
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5em;
}

.work-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}

.work-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}

/* Gradient top bar on hover */
.work-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient);
  opacity: 0;
  transition: var(--transition);
}

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

.work-card-header {
  padding: 1.8em 1.8em 0.5em;
}

.work-card-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2em;
  color: white;
}

.work-card-icon.blue { background: var(--gradient); }
.work-card-icon.cyan { background: linear-gradient(135deg, #06b6d4, #22d3ee); }
.work-card-icon.purple { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }
.work-card-icon.green { background: linear-gradient(135deg, #10b981, #34d399); }
.work-card-icon.orange { background: linear-gradient(135deg, #f59e0b, #fbbf24); }

.work-card-body {
  padding: 0.8em 1.8em 1.5em;
}

.work-card h3 {
  font-size: 1.1em;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 0.3em;
}

.work-card-company {
  font-size: 0.78em;
  color: var(--primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.7em;
  display: block;
}

.work-card p {
  font-size: 0.9em;
  color: var(--gray);
  line-height: 1.65;
  margin: 0;
}

.work-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35em;
  padding: 1em 1.8em 1.5em;
  border-top: 1px solid var(--light-2);
}

.work-tag {
  background: var(--light);
  color: var(--gray);
  padding: 0.25em 0.65em;
  border-radius: var(--radius-xs);
  font-size: 0.76em;
  font-weight: 600;
  transition: var(--transition);
}

.work-card:hover .work-tag {
  background: linear-gradient(135deg, rgba(37,99,235,0.06), rgba(6,182,212,0.06));
  color: var(--primary);
}

/* ============================================================
   CONTACT / FOOTER
   ============================================================ */
.section-contact {
  background: var(--gradient-dark) !important;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.section-contact::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 24px 24px;
}

.section-contact * {
  position: relative;
  z-index: 1;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 1em;
  margin-top: 2.5em;
  flex-wrap: wrap;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.9em 1.8em;
  border-radius: var(--radius-sm);
  text-decoration: none !important;
  font-weight: 600;
  font-size: 0.92em;
  transition: var(--transition);
}

.contact-btn.primary {
  background: var(--gradient);
  color: var(--white) !important;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

.contact-btn.primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(37, 99, 235, 0.45);
}

.contact-btn.outline {
  background: rgba(255,255,255,0.04);
  color: #cbd5e1 !important;
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
}

.contact-btn.outline:hover {
  background: rgba(255,255,255,0.08);
  color: var(--white) !important;
  border-color: rgba(255,255,255,0.25);
  transform: translateY(-3px);
}

.footer-copy {
  margin-top: 4em;
  padding-top: 2em;
  border-top: 1px solid rgba(255,255,255,0.06);
  color: #475569;
  font-size: 0.82em;
}

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 2em;
  right: 2em;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none !important;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
  opacity: 0;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 100;
  font-size: 0.9em;
}

.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(37, 99, 235, 0.45);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .about-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .about-photo {
    width: 150px;
    height: 150px;
  }

  .about-highlights {
    grid-template-columns: repeat(2, 1fr);
  }

  #header {
    min-height: auto;
    padding: 3em 0 4em !important;
  }

  #header h1 {
    font-size: 2.2em;
  }

  .section {
    padding: 4em 0;
  }

  .section-title {
    font-size: 1.8em;
  }

  .timeline {
    padding-left: 2em;
  }

  .timeline-item::before {
    width: 12px;
    height: 12px;
    left: -2.5em;
  }

  .timeline-item:first-child::before {
    width: 14px;
    height: 14px;
    left: -2.55em;
  }

  .timeline-item::after {
    left: -0.8em;
    width: 0.8em;
  }

  .timeline-header {
    flex-direction: column;
    gap: 0.15em;
  }

  .timeline-dot {
    display: none;
  }

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

  .contact-links {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .nav-inner {
    gap: 0.15em;
  }

  .nav-link {
    font-size: 0.75em;
    padding: 0.4em 0.6em;
  }
}

@media (max-width: 480px) {
  #header h1 {
    font-size: 1.8em;
  }

  .section {
    padding: 3em 0;
  }

  .container-custom {
    padding: 0 1.2em;
  }

  .about-highlights {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6em;
  }

  .highlight-card {
    padding: 1em 0.6em;
  }

  .highlight-card .num {
    font-size: 1.5em;
  }

  .timeline-item {
    padding: 1.2em;
  }
}