/* ─── Variables ─────────────────────────────────────────────────────── */
:root {
  --bg:        #FFFFFF;
  --bg-alt:    #EEF2FA;
  --surface:   #D8E5F5;
  --navy:      #0D2045;
  --navy-70:   rgba(13, 32, 69, 0.68);
  --navy-40:   rgba(13, 32, 69, 0.38);
  --royal:     #1D4ED8;
  --royal-bg:  rgba(29, 78, 216, 0.09);
  --rule:      #B5C8E5;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  --nav-h: 64px;
  --max-w: 1100px;
}

/* ─── Reset ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--navy);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; }

/* ─── Nav ────────────────────────────────────────────────────────────── */
#nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}
#nav.scrolled {
  border-bottom-color: var(--rule);
  box-shadow: 0 1px 24px rgba(13, 32, 69, .07);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: 0.06em;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: 2rem;
  flex: 1;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--navy-70);
  position: relative;
  transition: color 0.2s;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--royal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s;
}
.nav-links a:hover { color: var(--royal); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-social {
  display: flex;
  gap: 1.1rem;
  align-items: center;
  margin-left: auto;
}
.nav-social a {
  color: var(--navy-40);
  transition: color 0.2s;
  display: flex;
  align-items: center;
}
.nav-social a:hover { color: var(--royal); }
.nav-social svg { width: 17px; height: 17px; }

/* ─── Hero ───────────────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-h) + 4rem) 2rem 4rem;
  position: relative;
  overflow: hidden;
}
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(45deg,  transparent, transparent 40px, rgba(29,78,216,.018) 40px, rgba(29,78,216,.018) 41px),
    repeating-linear-gradient(-45deg, transparent, transparent 40px, rgba(29,78,216,.018) 40px, rgba(29,78,216,.018) 41px);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 300px;
  align-items: center;
  gap: 5rem;
  position: relative;
}
.hero-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--royal);
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.15s ease-out forwards;
}
.hero-text h1 {
  font-family: var(--font-display);
  font-size: clamp(72px, 10.5vw, 148px);
  font-weight: 300;
  line-height: 0.88;
  letter-spacing: -0.025em;
  color: var(--navy);
  margin-bottom: 2.2rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.3s ease-out forwards;
}
.hero-tagline {
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.65;
  color: var(--navy-70);
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.7s 0.45s ease-out forwards;
}
.hero-social {
  display: flex;
  gap: 1.4rem;
  align-items: center;
  opacity: 0;
  animation: fadeUp 0.7s 0.6s ease-out forwards;
}
.hero-social a {
  color: var(--navy-40);
  transition: color 0.2s, transform 0.2s;
  display: flex;
}
.hero-social a:hover { color: var(--royal); transform: translateY(-2px); }
.hero-social svg { width: 22px; height: 22px; }
.hero-image {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  animation: fadeIn 1s 0.5s ease-out forwards;
}
.hero-image-ring {
  position: absolute;
  inset: -10px;
  border-radius: 50%;
  border: 1px solid var(--royal);
  opacity: 0.18;
  animation: pulse 4s ease-in-out infinite;
}
.hero-image img {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  position: relative;
  z-index: 1;
  box-shadow: 0 20px 60px rgba(13, 32, 69, .14);
}
.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--navy-40);
  opacity: 0;
  animation: fadeIn 1s 1.2s ease-out forwards;
  transition: opacity 0.4s;
}
.hero-scroll.hidden { opacity: 0 !important; }
.scroll-dot { animation: scrollBob 1.8s ease-in-out infinite; }

/* ─── Sections ───────────────────────────────────────────────────────── */
.section { padding: 110px 2rem; }
.section--alt { background: var(--bg-alt); }
.section-inner { max-width: var(--max-w); margin: 0 auto; }
.section-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 4rem;
}
.section-number {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--royal);
  letter-spacing: 0.1em;
  line-height: 1;
  margin-top: 0.1em;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(38px, 5.5vw, 62px);
  font-weight: 300;
  letter-spacing: -0.015em;
  line-height: 1;
  color: var(--navy);
}

/* ─── About ──────────────────────────────────────────────────────────── */
.about-body { max-width: 700px; }
.about-body p {
  font-size: 1.05rem;
  line-height: 1.82;
  color: var(--navy-70);
  margin-bottom: 1.4rem;
}
.skills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 2rem 0;
}
.skill-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  color: var(--navy);
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.skill-tag:hover {
  background: var(--royal-bg);
  border-color: var(--royal);
  color: var(--royal);
}
.resume-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--royal);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  transition: opacity 0.2s;
  margin-top: 0.5rem;
}
.resume-link:hover { opacity: 0.65; }

/* ─── Education ──────────────────────────────────────────────────────── */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.edu-card {
  background: #fff;
  border: 1px solid var(--rule);
  padding: 2.2rem 2.5rem;
  transition: box-shadow 0.25s;
}
.edu-card:hover {
  box-shadow: 0 6px 28px rgba(13, 32, 69, .09);
}
.edu-card-top {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  margin-bottom: 1.4rem;
}
.edu-logo-wrap {
  width: 110px;
  height: 110px;
  flex-shrink: 0;
  border: 1px solid var(--rule);
  background: #fff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.edu-logo-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 10px;
}
.edu-info { flex: 1; }
.edu-school {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin-bottom: 0.3rem;
}
.edu-degree {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--navy);
  margin-bottom: 0.15rem;
}
.edu-subtext {
  font-size: 0.88rem;
  color: var(--navy-70);
  font-style: italic;
  margin-bottom: 0.3rem;
}
.edu-date {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--royal);
  letter-spacing: 0.08em;
}
.edu-courses {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  color: var(--navy-70);
  line-height: 1.75;
  letter-spacing: 0.03em;
  border-top: 1px solid var(--rule);
  padding-top: 1.1rem;
}

/* ─── Timeline ───────────────────────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: 1.5rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 2.5rem;
  width: 1px;
  background: var(--rule);
}
.timeline-item {
  position: relative;
  padding-left: 2.5rem;
  padding-bottom: 3rem;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease-out, transform 0.55s ease-out;
}
.timeline-item.visible { opacity: 1; transform: none; }
.timeline-item::before {
  content: '◆';
  position: absolute;
  left: -0.55rem;
  top: 18px;
  font-size: 0.5rem;
  color: var(--royal);
  background: #fff;
  line-height: 1;
  padding: 3px 0;
}
.timeline-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.4rem;
}
.timeline-logo-wrap {
  width: 72px;
  height: 72px;
  flex-shrink: 0;
  border: 1px solid var(--rule);
  background: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.timeline-logo-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 7px;
}
.timeline-meta {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.8rem;
  flex: 1;
}
.timeline-company {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--navy);
}
.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.06em;
  color: var(--royal);
  margin-left: auto;
  white-space: nowrap;
}
.timeline-role {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--navy-70);
  margin-bottom: 0.65rem;
  font-weight: 500;
}
.timeline-desc {
  font-size: 0.97rem;
  line-height: 1.75;
  color: var(--navy-70);
  max-width: 680px;
}

/* ─── Projects ───────────────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.project-card {
  background: #fff;
  border: 1px solid var(--rule);
  padding: 3rem 3rem 2.5rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(13, 32, 69, .1);
}
.project-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--royal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.project-card:hover::after { transform: scaleX(1); }
.project-org {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--royal);
  margin-bottom: 1rem;
}
.project-title {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 300;
  line-height: 1.15;
  color: var(--navy);
  margin-bottom: 1.1rem;
  letter-spacing: -0.01em;
}
.project-desc {
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--navy-70);
  margin-bottom: 2rem;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1rem;
}
.project-tag {
  font-family: var(--font-mono);
  font-size: 0.63rem;
  letter-spacing: 0.07em;
  padding: 0.28rem 0.6rem;
  border: 1px solid var(--rule);
  background: var(--surface);
  color: var(--navy);
}
.project-link-disabled {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--navy-40);
  font-style: italic;
  display: block;
  margin-top: 1rem;
}

/* ─── Articles ───────────────────────────────────────────────────────── */
.writing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}
.article-card {
  background: #fff;
  padding: 2rem 1.8rem;
  color: inherit;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  transition: background 0.2s;
}
.article-card:hover { background: var(--bg-alt); }
.article-date {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--royal);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}
.article-title {
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 400;
  line-height: 1.35;
  color: var(--navy);
  margin-bottom: 1.2rem;
}
.article-read {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--navy-40);
  transition: color 0.2s;
  display: inline-block;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.article-card:hover .article-read {
  color: var(--royal);
  border-bottom-color: var(--royal);
}

/* ─── Footer ─────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--rule);
  padding: 2rem;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-name {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--navy-40);
  font-style: italic;
}
.footer-links {
  display: flex;
  gap: 1.3rem;
  align-items: center;
}
.footer-links a { color: var(--navy-40); transition: color 0.2s; display: flex; }
.footer-links a:hover { color: var(--royal); }
.footer-links svg { width: 16px; height: 16px; }

/* ─── Animations ─────────────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: none; }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes pulse {
  0%, 100% { transform: scale(1);    opacity: 0.18; }
  50%       { transform: scale(1.04); opacity: 0.08; }
}
@keyframes scrollBob {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(6px); }
}
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.reveal.visible { opacity: 1; transform: none; }

/* ─── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image { display: none; }
  .projects-grid { grid-template-columns: 1fr; }
  .edu-grid { grid-template-columns: 1fr; }
  .writing-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .writing-grid { grid-template-columns: 1fr; }
  .section { padding: 72px 1.5rem; }
  .project-card { padding: 2rem; }
  .timeline-date { margin-left: 0; }
  .edu-card { padding: 1.5rem; }
}
@media (max-width: 480px) {
  .hero-social { gap: 1rem; }
  .section-header { flex-direction: column; gap: 0.4rem; }
}