:root {
  --brg:       #004225;
  --brg-dark:  #002b18;
  --brg-mid:   #1a5c3a;
  --cream:     #F2EDE3;
  --parchment: #EDE6D8;
  --off-white: #FAF9F6;
  --ink:       #1C1C1A;
  --ink-mid:   #3a3a38;
  --ink-light: #6b6b68;
  --gold:      #B8955A;
  --border:    #DDD8CE;
  --border-light: #EAE6DE;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--off-white);
  color: var(--ink);
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  overflow-x: hidden;
}

/* ── NAV ─────────────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  display: flex; justify-content: space-between; align-items: center;
  padding: 1.1rem 4rem;
  background: rgba(250, 249, 246, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
}
.nav-logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.05rem; font-weight: 700;
  color: var(--brg); letter-spacing: 0.04em;
}
.nav-right { display: flex; align-items: center; gap: 2.5rem; }
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a {
  font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--ink-light); text-decoration: none;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--brg); }

/* Theme toggle button */
.theme-toggle {
  background: none; border: 1px solid var(--border);
  color: var(--ink-light); cursor: pointer;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  transition: color 0.2s, border-color 0.2s;
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--brg); border-color: var(--brg); }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* ── HERO ────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  align-items: center; gap: 4rem;
  padding: 6rem 4rem 4rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: -40px;
  background-image: radial-gradient(circle, var(--brg) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.13;
  pointer-events: none;
  z-index: 0;
  transform: rotate(5deg);
}
.hero > * { position: relative; z-index: 1; }
.hero-skyline {
  position: absolute; bottom: 0; left: 0;
  width: 100%; height: auto;
  z-index: 0; pointer-events: none;
  user-select: none;
}
.hero-eyebrow {
  display: flex; align-items: center; gap: 1rem;
  font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--brg); margin-bottom: 1.6rem;
}
.hero-eyebrow::before {
  content: ''; display: block;
  width: 2.5rem; height: 1px; background: var(--brg);
}
.hero-name {
  font-family: 'Playfair Display', serif;
  font-size: clamp(4rem, 7vw, 7rem);
  font-weight: 900; line-height: 0.95;
  color: var(--ink); margin-bottom: 1.8rem;
  letter-spacing: -0.02em;
}
.hero-name em { font-style: italic; color: var(--brg); }
.hero-desc {
  font-size: 1rem; font-weight: 300;
  line-height: 1.85; color: var(--ink-light);
  max-width: 40ch; margin-bottom: 2.8rem;
}
.hero-desc strong { color: var(--ink); font-weight: 500; }
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.9rem 2rem; font-size: 0.73rem;
  font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase;
  text-decoration: none; transition: all 0.22s;
}
.btn-primary { background: var(--brg); color: #fff; }
.btn-primary:hover { background: var(--brg-dark); }
.btn-outline { border: 1px solid var(--brg); color: var(--brg); }
.btn-outline:hover { background: var(--brg); color: #fff; }

/* Right side visual */
.hero-visual {
  display: flex; flex-direction: column;
  align-items: center; gap: 1.5rem;
}
.photo-frame {
  width: 100%; max-width: 340px;
  aspect-ratio: 4/5;
  background: var(--cream);
  border: 1px solid var(--border);
  position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.photo-frame::after {
  content: '';
  position: absolute; inset: 10px;
  border: 1px solid var(--brg); opacity: 0.25;
  pointer-events: none;
}
.photo-frame img { width: 100%; height: 100%; object-fit: cover; display: block; }
.photo-placeholder {
  font-size: 0.72rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-light); opacity: 0.45;
}

.hero-stats {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0.8rem; width: 100%; max-width: 340px;
}
.stat {
  background: var(--cream);
  border: 1px solid var(--border);
  padding: 1rem 1.2rem;
}
.stat-num {
  font-family: 'Playfair Display', serif;
  font-size: 1.7rem; font-weight: 700;
  color: var(--brg); line-height: 1;
}
.stat-lbl {
  font-size: 0.65rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-light);
  margin-top: 0.3rem;
}

/* ── TICKER ──────────────────────────────────────────── */
.ticker-band {
  background: var(--brg);
  border-top: 1px solid var(--brg-mid);
  border-bottom: 1px solid var(--brg-mid);
  padding: 0.85rem 0; overflow: hidden;
  position: relative;
  margin-top: -2.5rem;
}
.ticker-band::before,
.ticker-band::after {
  content: '';
  position: absolute; top: 0; bottom: 0; width: 80px; z-index: 2;
}
.ticker-band::before { left: 0; background: linear-gradient(90deg, var(--brg), transparent); }
.ticker-band::after  { right: 0; background: linear-gradient(-90deg, var(--brg), transparent); }
.ticker-track {
  display: flex; width: max-content;
  animation: ticker-scroll 40s linear infinite;
}
.ticker-track:hover { animation-play-state: paused; }
.ticker-item {
  display: inline-flex; align-items: center; gap: 1.2rem;
  padding: 0 2.2rem;
  font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: rgba(255,255,255,0.8); white-space: nowrap;
}
.ticker-diamond {
  width: 5px; height: 5px; flex-shrink: 0;
  background: var(--gold);
  transform: rotate(45deg);
}
@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}

/* ── SECTIONS COMMON ─────────────────────────────────── */
section { padding: 5.5rem 4rem; }

.section-header {
  display: flex; align-items: baseline; gap: 1.5rem;
  margin-bottom: 3.5rem;
}
.section-num {
  font-family: 'Playfair Display', serif;
  font-size: 0.85rem; font-weight: 400;
  color: var(--gold); letter-spacing: 0.08em;
}
.section-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700; color: var(--ink);
}
.section-title em { font-style: italic; color: var(--brg); }
.section-rule {
  flex: 1; height: 1px; background: var(--border);
  margin-left: 0.5rem; align-self: center;
}

/* ── ABOUT ───────────────────────────────────────────── */
#about { background: var(--cream); border-top: 1px solid var(--border); }
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 5rem; align-items: start;
}
.about-body p {
  font-size: 0.97rem; line-height: 1.9;
  color: var(--ink-light); margin-bottom: 1.2rem;
}
.about-body p strong { color: var(--ink); font-weight: 500; }
.about-details { display: flex; flex-direction: column; }
.detail-row {
  display: grid; grid-template-columns: 7rem 1fr;
  gap: 1.5rem; align-items: start;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border-light);
}
.detail-key {
  font-size: 0.66rem; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--brg); padding-top: 0.15rem;
}
.detail-val {
  font-size: 0.88rem; color: var(--ink-light); line-height: 1.6;
}
.detail-val a { color: var(--brg); text-decoration: none; }
.detail-val a:hover { text-decoration: underline; }

/* ── PROJECTS ────────────────────────────────────────── */
#projects { border-top: 1px solid var(--border); }

.featured-project {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0; margin-bottom: 2rem;
  border: 1px solid var(--brg);
  overflow: hidden;
}
.featured-text { padding: 2.5rem; background: var(--cream); }
.featured-label {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-size: 0.65rem; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--brg); margin-bottom: 1.2rem;
}
.featured-label::before {
  content: ''; display: block;
  width: 8px; height: 8px;
  background: var(--brg); border-radius: 50%;
}
.featured-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.9rem; font-weight: 700; line-height: 1.15;
  color: var(--ink); margin-bottom: 1rem;
}
.featured-desc {
  font-size: 0.88rem; line-height: 1.8;
  color: var(--ink-light); margin-bottom: 1.5rem;
}
.featured-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  font-size: 0.66rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--border);
  color: var(--ink-mid); background: var(--off-white);
}
.featured-visual {
  background: var(--brg);
  display: flex; flex-direction: column;
  justify-content: center; align-items: flex-start;
  padding: 2.5rem;
  gap: 1.5rem;
}
.attack-chain { display: flex; flex-direction: column; gap: 0.7rem; width: 100%; }
.chain-step {
  display: flex; align-items: center; gap: 0.8rem;
  font-size: 0.72rem; color: rgba(255,255,255,0.8);
  font-weight: 400; letter-spacing: 0.08em;
}
.chain-icon {
  width: 28px; height: 28px; flex-shrink: 0;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
}
.chain-line {
  width: 1px; height: 14px;
  background: rgba(255,255,255,0.2);
  margin-left: 13px;
}
.chain-mitre {
  font-size: 0.6rem; color: var(--gold);
  letter-spacing: 0.08em;
}
.featured-note {
  font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1rem; width: 100%;
}

/* GitHub cards grid */
.projects-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.2rem; margin-bottom: 2.5rem;
}
.project-card {
  display: block; text-decoration: none; color: inherit;
  border: 1px solid var(--border);
  background: #fff; padding: 1.8rem;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--brg);
  box-shadow: 0 8px 30px rgba(0,66,37,0.08);
}
.card-badge {
  font-size: 0.62rem; font-weight: 500;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--brg);
  background: rgba(0,66,37,0.07);
  padding: 0.22rem 0.6rem;
  display: inline-block; margin-bottom: 0.9rem;
}
.card-name {
  font-family: 'Playfair Display', serif;
  font-size: 1.15rem; font-weight: 700;
  color: var(--ink); margin-bottom: 0.5rem; line-height: 1.3;
}
.card-desc {
  font-size: 0.82rem; color: var(--ink-light);
  line-height: 1.7; margin-bottom: 1.2rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-footer {
  display: flex; justify-content: space-between; align-items: center;
}
.card-lang {
  display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.72rem; color: var(--ink-light);
}
.lang-dot {
  width: 9px; height: 9px; border-radius: 50%;
}
.card-stars { font-size: 0.72rem; color: var(--gold); }

/* Skeleton loader */
.skel {
  background: linear-gradient(90deg, var(--border) 25%, var(--parchment) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
  border-radius: 2px;
}
@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}

/* Contribution graph */
.contribution-box {
  border: 1px solid var(--border);
  background: #fff; padding: 2rem 2.5rem;
}
.contribution-header {
  display: flex; justify-content: space-between;
  align-items: center; margin-bottom: 1.5rem;
}
.contribution-label {
  font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--brg);
}
.contribution-link {
  font-size: 0.72rem; color: var(--ink-light);
  text-decoration: none; letter-spacing: 0.06em;
}
.contribution-link:hover { color: var(--brg); }
.graph-img { width: 100%; display: block; }

/* ── SKILLS ──────────────────────────────────────────── */
#skills { background: var(--cream); border-top: 1px solid var(--border); }
.skills-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.2rem;
}
.skill-group {
  background: #fff; border: 1px solid var(--border);
  padding: 1.6rem;
}
.skill-group-name {
  font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--brg); margin-bottom: 1rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--border-light);
}
.skill-pills { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.pill {
  font-size: 0.76rem; padding: 0.3rem 0.65rem;
  border: 1px solid var(--border);
  color: var(--ink-mid); background: var(--cream);
}

/* ── CERTIFICATIONS ──────────────────────────────────── */
#certs { border-top: 1px solid var(--border); }
.cert-table { width: 100%; border-collapse: collapse; }
.cert-row {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto auto;
  gap: 2rem; align-items: center;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--border-light);
}
.cert-num {
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem; font-weight: 400;
  color: var(--border); line-height: 1;
}
.cert-name {
  font-family: 'Playfair Display', serif;
  font-size: 1.05rem; font-weight: 600; color: var(--ink);
}
.cert-issuer {
  font-size: 0.76rem; color: var(--ink-light);
  margin-top: 0.2rem;
}
.badge {
  font-size: 0.63rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.28rem 0.75rem; white-space: nowrap;
}
.badge-done { color: var(--brg); border: 1px solid var(--brg); }
.badge-wip  { color: var(--gold); border: 1px solid var(--gold); }
.cert-year  { font-size: 0.76rem; color: var(--ink-light); text-align: right; }

/* ── FOOTER ──────────────────────────────────────────── */
footer {
  background: var(--brg); color: #fff;
  padding: 5rem 4rem 3rem;
}
.footer-grid {
  display: grid; grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem; align-items: end; margin-bottom: 3rem;
}
.footer-heading {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 900; line-height: 0.95;
  margin-bottom: 1rem;
}
.footer-heading em { font-style: italic; opacity: 0.7; }
.footer-sub {
  font-size: 0.85rem; opacity: 0.55;
  line-height: 1.7; font-weight: 300;
}
.footer-links-col { display: flex; flex-direction: column; gap: 1rem; align-items: flex-end; }
.footer-link {
  display: flex; align-items: center; gap: 0.6rem;
  color: rgba(255,255,255,0.65); text-decoration: none;
  font-size: 0.83rem; letter-spacing: 0.04em;
  transition: color 0.2s;
}
.footer-link:hover { color: #fff; }
.footer-link svg { flex-shrink: 0; }
.footer-divider { border: none; border-top: 1px solid rgba(255,255,255,0.12); margin-bottom: 1.5rem; }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.7rem; opacity: 0.35; letter-spacing: 0.08em;
}

/* ── ANIMATIONS ──────────────────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ── DARK MODE ───────────────────────────────────────── */
[data-theme="dark"] {
  --brg:       #3da06a;
  --brg-dark:  #2d8a56;
  --brg-mid:   #4db87a;
  --cream:     #1e1e1c;
  --parchment: #252523;
  --off-white: #151514;
  --ink:       #E8E6E1;
  --ink-mid:   #C5C5C2;
  --ink-light: #9A9A97;
  --gold:      #C9A86C;
  --border:    #333330;
  --border-light: #2a2a28;
}
[data-theme="dark"] nav {
  background: rgba(21, 21, 20, 0.92);
}
[data-theme="dark"] .project-card,
[data-theme="dark"] .skill-group,
[data-theme="dark"] .contribution-box {
  background: #1e1e1c;
}
[data-theme="dark"] .project-card:hover {
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}
[data-theme="dark"] .card-badge {
  background: rgba(61,160,106,0.12);
}
[data-theme="dark"] footer {
  background: #0a2818;
}
[data-theme="dark"] .hero-skyline {
  background-color: var(--gold);
  -webkit-mask: url('skyline.svg') no-repeat bottom;
  mask: url('skyline.svg') no-repeat bottom;
  mask-size: cover;
  filter: none;
  opacity: 0.8;
}

/* ── RESPONSIVE ──────────────────────────────────────── */
@media (max-width: 960px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { gap: 1.2rem; }
  section { padding: 3.5rem 1.5rem; }
  .hero { grid-template-columns: 1fr; padding: 7rem 1.5rem 3rem; }
  .hero-visual { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .featured-project { grid-template-columns: 1fr; }
  .featured-visual { display: none; }
  footer { padding: 3.5rem 1.5rem 2.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-links-col { align-items: flex-start; }
  .cert-row { grid-template-columns: 1fr auto; }
  .cert-num, .cert-year { display: none; }
}