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

:root {
  --accent: #2563EB;
  --accent-light: #3B82F6;
  --accent-dark: #1D4ED8;
  --dark: #0F172A;
  --dark-2: #1E293B;
  --mid: #475569;
  --light: #F1F5F9;
  --white: #FFFFFF;
  --text: #1E293B;
  --text-muted: #64748B;
  --border: #E2E8F0;
  --font: 'Inter', system-ui, sans-serif;
  --radius: 8px;
  --max-width: 1100px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

/* ===========================
   LAYOUT HELPERS
   =========================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===========================
   NAV
   =========================== */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: box-shadow 0.3s;
}

#nav.scrolled {
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--white);
  letter-spacing: -0.02em;
  background: var(--accent);
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-links a {
  color: rgba(255,255,255,0.75);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
  letter-spacing: 0.02em;
}

.nav-links a:hover {
  color: var(--white);
}

/* ===========================
   HERO
   =========================== */
#hero {
  min-height: 100vh;
  background: var(--dark);
  display: flex;
  align-items: center;
  padding: 8rem 2rem 6rem;
  position: relative;
  overflow: hidden;
}

.hero-accent {
  position: absolute;
  top: -200px;
  right: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.18) 0%, transparent 65%);
  pointer-events: none;
}

.hero-content {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 1.25rem;
}

.hero-name {
  font-size: clamp(3.5rem, 9vw, 7.5rem);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--white);
  margin-bottom: 1.75rem;
}

.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: rgba(255,255,255,0.6);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ===========================
   BUTTONS
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
  cursor: pointer;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.25);
  color: var(--white);
}

.btn-outline:hover {
  border-color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.06);
  transform: translateY(-1px);
}

/* ===========================
   SECTION SHARED
   =========================== */
.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-label.light {
  color: var(--accent-light);
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 3rem;
  line-height: 1.1;
}

/* ===========================
   ABOUT
   =========================== */
#about {
  padding: 7rem 0;
  background: var(--white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-text h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  color: var(--dark);
}

.about-text p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
  line-height: 1.75;
}

.about-skills h3 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.skill-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.skill-list li {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  padding: 0.6rem 1rem;
  background: var(--light);
  border-radius: var(--radius);
  border-left: 3px solid var(--accent);
}

/* ===========================
   EXPERIENCE
   =========================== */
#experience {
  padding: 7rem 0;
  background: var(--light);
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 4rem;
  border-left: 2px solid var(--border);
  padding-left: 2rem;
  margin-left: 1rem;
}

.timeline-item {
  padding-bottom: 3rem;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.6rem;
  top: 0.4rem;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 2.5px solid var(--light);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}

.timeline-date {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.timeline-company {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  padding: 0.15rem 0.65rem;
  background: var(--border);
  border-radius: 999px;
}

.timeline-role {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--dark);
  margin-bottom: 0.75rem;
}

.timeline-body p {
  color: var(--text-muted);
  font-size: 0.97rem;
  margin-bottom: 0.75rem;
  line-height: 1.7;
}

.timeline-body ul {
  padding-left: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.timeline-body ul li {
  color: var(--text-muted);
  font-size: 0.95rem;
  position: relative;
  padding-left: 0.25rem;
  line-height: 1.6;
  list-style: disc;
}

/* Education */
.education {
  border-top: 1px solid var(--border);
  padding-top: 2.5rem;
}

.education h3 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.edu-degree {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
}

.edu-school {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* ===========================
   CONTACT
   =========================== */
#contact {
  padding: 7rem 0;
  background: var(--dark);
  color: var(--white);
}

.contact-inner {
  max-width: 680px;
}

#contact h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  line-height: 1.1;
}

#contact p {
  color: rgba(255,255,255,0.6);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  transition: color 0.2s;
}

.contact-link:hover {
  color: var(--accent-light);
}

.contact-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.08);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-style: normal;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
  transition: background 0.2s;
}

.contact-link:hover .contact-icon {
  background: var(--accent);
}

/* ===========================
   FOOTER
   =========================== */
footer {
  background: #070E1C;
  padding: 1.5rem 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
}

/* ===========================
   ANIMATIONS
   =========================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.nav-links a.active {
  color: var(--white);
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-name {
    font-size: clamp(3rem, 14vw, 5rem);
  }

  .nav-links {
    gap: 1.5rem;
  }

  .timeline {
    padding-left: 1.5rem;
  }

  .timeline-item::before {
    left: -2.1rem;
  }

  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .nav-links {
    gap: 1rem;
  }
}