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

:root {
  --navy:    #0D1B2A;
  --navy2:   #132336;
  --slate:   #8892A4;
  --offwhite:#F0EEE9;
  --indigo:  #5C6BC0;
  --indigo-l:#7986CB;
  --amber:   #F2A65A;
  --border:  rgba(255,255,255,0.07);
}

html { scroll-behavior: smooth; }

body {
  background: var(--navy);
  color: var(--offwhite);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 6vw;
  background: rgba(13,27,42,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700; font-size: 1.1rem;
  color: var(--offwhite);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-logo span { color: var(--amber); }
.nav-links { display: flex; gap: 2rem; list-style: none; }
.nav-links a {
  color: var(--slate); font-size: 0.875rem; text-decoration: none;
  transition: color 0.2s;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid transparent;
}
.nav-links a:hover { color: var(--offwhite); }
.nav-links a.active { color: var(--offwhite); border-bottom-color: var(--amber); }

/* mobile nav toggle */
.nav-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  width: 32px; height: 26px; position: relative; z-index: 110;
}
.nav-toggle span {
  display: block; position: absolute; left: 0; right: 0; height: 2px;
  background: var(--offwhite); border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle span:nth-child(1) { top: 4px; }
.nav-toggle span:nth-child(2) { top: 12px; }
.nav-toggle span:nth-child(3) { top: 20px; }
.nav-toggle.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ── HERO (home page) ── */
#hero {
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 10rem 6vw 6rem;
  position: relative; overflow: hidden;
}
.hero-eyebrow {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--amber); margin-bottom: 1.5rem;
}
.hero-name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 700; line-height: 1.0;
  letter-spacing: -0.03em;
  margin-bottom: 0.4rem;
}
.hero-name .line2 { color: var(--indigo-l); }
.hero-tagline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.1rem, 2.5vw, 1.6rem);
  font-weight: 300; color: var(--slate);
  margin-bottom: 2.5rem;
  display: flex; align-items: center; gap: 0.4em;
}
.cursor {
  display: inline-block; width: 2px; height: 1.2em;
  background: var(--amber); vertical-align: middle;
  animation: blink 1.1s step-end infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.9rem; font-weight: 600;
  text-decoration: none; cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  border: none;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--indigo); color: #fff;
  box-shadow: 0 0 0 0 rgba(92,107,192,0);
}
.btn-primary:hover { box-shadow: 0 8px 30px rgba(92,107,192,0.45); }
.btn-ghost {
  border: 1px solid var(--border); color: var(--offwhite);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--indigo-l); }

/* hero grid lines (decorative) */
#hero::before {
  content: '';
  position: absolute; right: -10%; top: 15%; width: 55%; height: 70%;
  background:
    repeating-linear-gradient(90deg, var(--border) 0, var(--border) 1px, transparent 1px, transparent 60px),
    repeating-linear-gradient(0deg,  var(--border) 0, var(--border) 1px, transparent 1px, transparent 60px);
  border-radius: 2px;
  pointer-events: none;
}
.hero-dot {
  position: absolute; right: 12%; top: 38%;
  width: 340px; height: 340px; border-radius: 50%;
  background: radial-gradient(circle, rgba(92,107,192,0.18) 0%, transparent 70%);
  pointer-events: none;
}

/* ── PAGE HEADER (sub-pages) ── */
.page-header {
  padding: 9.5rem 6vw 3rem;
  position: relative; overflow: hidden;
}
.page-header .hero-dot {
  width: 260px; height: 260px; top: 10%; right: 6%;
}
.page-header h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 700; letter-spacing: -0.03em;
  line-height: 1.1;
}
.page-header p {
  color: var(--slate); font-size: 1.05rem; max-width: 640px; margin-top: 1rem;
}

/* ── SECTIONS ── */
section { padding: 6rem 6vw; }
.section-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--amber); margin-bottom: 1rem;
}
.section-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700; letter-spacing: -0.025em;
  line-height: 1.15; margin-bottom: 3rem;
}
.divider { border: none; border-top: 1px solid var(--border); }

/* ── ABOUT ── */
#about { background: var(--navy2); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem; align-items: start;
}
.about-bio p {
  color: var(--slate); margin-bottom: 1.2rem; font-size: 1.05rem;
}
.about-bio p strong { color: var(--offwhite); font-weight: 500; }
.about-bio a { color: var(--indigo-l); text-decoration: none; }
.about-bio a:hover { text-decoration: underline; }

.skills-block h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--slate); margin-bottom: 0.75rem; margin-top: 2rem;
}
.skills-block h3:first-child { margin-top: 0; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  padding: 0.3rem 0.8rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.82rem; color: var(--offwhite);
  font-family: 'Space Grotesk', sans-serif;
}

/* ── PROJECTS ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--navy2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem;
  display: flex; flex-direction: column;
  transition: border-color 0.2s, transform 0.2s;
  text-decoration: none; color: inherit;
}
.project-card:hover {
  border-color: var(--indigo);
  transform: translateY(-4px);
}
.project-card.placeholder {
  border-style: dashed;
  opacity: 0.5; cursor: default;
}
.project-card.placeholder:hover { transform: none; border-color: var(--border); }
.project-icon {
  width: 40px; height: 40px; border-radius: 8px;
  background: rgba(92,107,192,0.15);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.25rem; font-size: 1.2rem;
}
.project-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem; font-weight: 600;
  margin-bottom: 0.5rem; letter-spacing: -0.01em;
}
.project-card p {
  font-size: 0.9rem; color: var(--slate);
  flex: 1; margin-bottom: 1.25rem; line-height: 1.6;
}
.project-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.project-tags .tag {
  font-size: 0.75rem;
  color: var(--indigo-l);
  border-color: rgba(92,107,192,0.3);
  background: rgba(92,107,192,0.08);
}
.project-link {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-size: 0.82rem; font-family: 'Space Grotesk', sans-serif;
  font-weight: 600; color: var(--indigo-l);
  text-decoration: none; margin-top: 1.25rem;
}
.project-link:hover { color: var(--offwhite); }

/* ── EXPERIENCE ── */
#experience { background: var(--navy2); }
.exp-list { display: flex; flex-direction: column; gap: 2.5rem; }
.exp-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 2rem; align-items: start;
}
.exp-date {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.82rem; color: var(--slate);
  padding-top: 0.2rem;
  line-height: 1.5;
}
.exp-date strong { display: block; color: var(--amber); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 0.2rem; }
.exp-body h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem; font-weight: 600;
  letter-spacing: -0.01em; margin-bottom: 0.2rem;
}
.exp-body .org {
  font-size: 0.85rem; color: var(--indigo-l);
  margin-bottom: 0.75rem;
}
.exp-body ul {
  padding-left: 1.1rem; color: var(--slate);
  font-size: 0.92rem; line-height: 1.75;
}
.exp-body ul li { margin-bottom: 0.3rem; }

/* ── EDUCATION ── */
.edu-card {
  background: var(--navy2);
  border: 1px solid var(--border);
  border-radius: 10px; padding: 2.5rem;
  display: flex; gap: 2rem; align-items: flex-start;
}
.edu-icon {
  width: 52px; height: 52px; flex-shrink: 0; border-radius: 10px;
  background: rgba(242,166,90,0.12);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
}
.edu-info h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem; font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: 0.25rem;
}
.edu-info .degree {
  color: var(--indigo-l); font-size: 0.92rem; margin-bottom: 0.75rem;
}
.edu-meta {
  display: flex; flex-wrap: wrap; gap: 1rem;
  font-size: 0.85rem; color: var(--slate);
}
.edu-meta span { display: flex; align-items: center; gap: 0.4rem; }
.edu-meta .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--amber); }

/* ── CONTACT ── */
#contact {
  background: var(--navy2);
  text-align: center;
}
#contact .section-title { margin-bottom: 1rem; }
#contact .sub {
  color: var(--slate); font-size: 1rem; margin-bottom: 2.5rem;
}
.contact-links { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }

/* ── HOME PAGE PREVIEW LINK CARDS ── */
.home-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}
.home-link-card {
  background: var(--navy2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s, transform 0.2s;
}
.home-link-card:hover { border-color: var(--indigo); transform: translateY(-4px); }
.home-link-card h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem; font-weight: 600; margin-bottom: 0.4rem;
}
.home-link-card p { color: var(--slate); font-size: 0.88rem; }
.home-link-card span {
  display: inline-block; margin-top: 0.9rem;
  font-family: 'Space Grotesk', sans-serif; font-size: 0.8rem; font-weight: 600;
  color: var(--indigo-l);
}

/* ── FOOTER ── */
footer {
  padding: 2rem 6vw;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.8rem; color: var(--slate);
  flex-wrap: wrap; gap: 0.5rem;
}

/* ── SCROLL REVEAL ── */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .exp-item { grid-template-columns: 1fr; gap: 0.4rem; }
  .edu-card { flex-direction: column; }
  nav { padding: 1rem 5vw; }
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; top: 0; right: 0; height: 100vh; width: 68%;
    max-width: 300px; background: var(--navy2);
    flex-direction: column; gap: 0; padding: 6rem 2rem 2rem;
    transform: translateX(100%); transition: transform 0.3s ease;
    border-left: 1px solid var(--border);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links li { width: 100%; }
  .nav-links a {
    display: block; padding: 0.9rem 0;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
  }
  .nav-links a.active { border-bottom: 1px solid var(--border); border-left: 2px solid var(--amber); padding-left: 0.6rem; }
  .hero-cta { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; opacity: 1; }
  .reveal { opacity: 1; transform: none; transition: none; }
}