/* Inspired by brittanychiang.com — clean developer portfolio aesthetic */

:root {
  --navy: #0a192f;
  --light-navy: #112240;
  --lightest-navy: #233554;
  --slate: #8892b0;
  --light-slate: #a8b2d1;
  --lightest-slate: #ccd6f6;
  --white: #e6f1ff;
  --green: #64ffda;
  --green-tint: rgba(100, 255, 218, 0.1);
  --font-sans: 'Calibre', 'Inter', 'San Francisco', 'Segoe UI', sans-serif;
  --font-mono: 'Fira Code', 'SF Mono', 'Fira Mono', 'Roboto Mono', monospace;
  --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
  --nav-height: 100px;
  --nav-scroll-height: 70px;
  --tab-height: 42px;
  --max-width: 1000px;
  --side-padding: 50px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.5;
  color: var(--slate);
  background-color: var(--navy);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* ── Tech background ── */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(100, 255, 218, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100, 255, 218, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black 20%, transparent 75%);
}

.bg-glow {
  position: fixed;
  top: 15%;
  left: 50%;
  width: 800px;
  height: 500px;
  margin-left: -400px;
  background: radial-gradient(ellipse, rgba(100, 255, 218, 0.06) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}

/* ── Mouse follow effects (desktop) ── */
.cursor-glow,
.cursor-dot,
.cursor-ring {
  display: none;
  pointer-events: none;
}

@media (hover: hover) and (pointer: fine) {
  body.mouse-fx { cursor: none; }
  body.mouse-fx a,
  body.mouse-fx button,
  body.mouse-fx .btn { cursor: none; }

  .cursor-glow {
    display: block;
    position: fixed;
    width: 420px;
    height: 420px;
    margin: -210px 0 0 -210px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(100, 255, 218, 0.07) 0%, transparent 65%);
    z-index: 0;
    opacity: 0;
    transition: opacity 0.4s ease;
    will-change: transform;
  }
  body.mouse-fx .cursor-glow { opacity: 1; }

  .cursor-dot {
    display: block;
    position: fixed;
    width: 6px;
    height: 6px;
    margin: -3px 0 0 -3px;
    border-radius: 50%;
    background: var(--green);
    z-index: 9998;
    box-shadow: 0 0 10px rgba(100, 255, 218, 0.8);
    will-change: transform;
  }

  .cursor-ring {
    display: block;
    position: fixed;
    width: 36px;
    height: 36px;
    margin: -18px 0 0 -18px;
    border-radius: 50%;
    border: 1px solid rgba(100, 255, 218, 0.45);
    z-index: 9997;
    transition: width 0.25s ease, height 0.25s ease, margin 0.25s ease, border-color 0.25s ease, background 0.25s ease;
    will-change: transform;
  }

  .cursor-ring.hovering {
    width: 52px;
    height: 52px;
    margin: -26px 0 0 -26px;
    border-color: rgba(100, 255, 218, 0.7);
    background: rgba(100, 255, 218, 0.06);
  }

  .tilt-card {
    transform-style: preserve-3d;
    will-change: transform;
  }
}

main, .nav-shell, .site-footer, .side-links { position: relative; z-index: 1; }

/* Custom scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--navy); }
::-webkit-scrollbar-thumb { background: var(--lightest-navy); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--green); }

/* Scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  z-index: 200;
  background: linear-gradient(90deg, var(--green), rgba(100, 255, 218, 0.5));
  box-shadow: 0 0 12px rgba(100, 255, 218, 0.5);
  transition: width 0.08s linear;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

a:hover { color: var(--green); }

::selection {
  background-color: var(--lightest-navy);
  color: var(--lightest-slate);
}

/* ── Fixed side links (desktop) ── */
.side-links {
  display: none;
  position: fixed;
  bottom: 0;
  z-index: 10;
}
@media (min-width: 768px) {
  .side-links { display: flex; flex-direction: column; align-items: center; }
  .side-links.left { left: var(--side-padding); }
  .side-links.right { right: var(--side-padding); }
}

.side-links ul {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.side-links a {
  display: inline-block;
  padding: 10px;
  color: var(--light-slate);
}
.side-links a:hover { color: var(--green); transform: translateY(-3px); }

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--light-slate);
  transition: var(--transition);
}
.social-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}
.social-icon:hover {
  color: var(--green);
  transform: translateY(-3px);
}

.social-row {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}

.footer-social {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-left: 10px;
  vertical-align: middle;
}
.footer-social .social-icon svg {
  width: 18px;
  height: 18px;
}

.side-links .line {
  width: 1px;
  height: 90px;
  background: var(--light-slate);
  margin-top: 20px;
}

.side-email {
  writing-mode: vertical-rl;
  letter-spacing: 0.1em;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--light-slate);
  padding: 10px;
}
.side-email:hover { color: var(--green); transform: translateY(-3px); }

/* ── Nav ── */
.nav-shell {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(10, 25, 47, 0.85);
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.nav-shell.scrolled {
  height: var(--nav-scroll-height);
  box-shadow: 0 10px 30px -10px rgba(2, 12, 27, 0.7);
}

.nav-inner {
  width: 100%;
  max-width: calc(var(--max-width) + var(--side-padding) * 2);
  margin: 0 auto;
  padding: 0 25px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--green);
  border: 2px solid var(--green);
  border-radius: 4px;
  padding: 8px 10px;
  line-height: 1;
}
.nav-logo:hover {
  background: var(--green-tint);
  color: var(--green);
}
.nav-logo.active {
  box-shadow: 0 0 12px rgba(100, 255, 218, 0.25);
}

.nav-links {
  display: none;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
@media (min-width: 768px) { .nav-links { display: flex; } }

.nav-links li { counter-increment: item; }

.nav-links a {
  display: flex;
  align-items: center;
  padding: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--lightest-slate);
}
.nav-links a::before {
  content: '0' counter(item) '.';
  margin-right: 5px;
  color: var(--green);
  font-size: 12px;
  text-align: right;
}
.nav-links a:hover { color: var(--green); }
.nav-links a.active {
  color: var(--green);
  text-shadow: 0 0 8px rgba(100, 255, 218, 0.4);
}

.nav-resume {
  margin-left: 15px;
  padding: 0.75rem 1rem;
  border: 1px solid var(--green);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--green);
}
.nav-resume:hover {
  background: var(--green-tint);
  color: var(--green);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
}
@media (min-width: 768px) { .nav-toggle { display: none; } }

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--green);
  transition: var(--transition);
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--light-navy);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--lightest-slate);
}
.mobile-menu a:hover { color: var(--green); }

/* ── Main layout ── */
main {
  min-height: 100vh;
  padding-top: var(--nav-height);
}

.page-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 25px 100px;
}

/* ── Hero ── */
.hero {
  min-height: calc(100vh - var(--nav-height));
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px 0;
}

.hero-split {
  display: grid;
  gap: 40px;
  align-items: center;
}
@media (min-width: 900px) {
  .hero-split { grid-template-columns: 1fr 1fr; gap: 48px; }
}

.hero-main { display: flex; flex-direction: column; gap: 0; }

.hero-overline {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 5vw, 16px);
  color: var(--green);
}

.blink {
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-name {
  margin: 0 0 10px;
  font-size: clamp(40px, 8vw, 72px);
  font-weight: 600;
  color: var(--lightest-slate);
  line-height: 1.1;
  text-shadow: 0 0 40px rgba(100, 255, 218, 0.08);
}

.accent-dot { color: var(--green); }

.metrics-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 8px;
}

.metric {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 16px;
  background: rgba(17, 34, 64, 0.8);
  border: 1px solid var(--lightest-navy);
  border-radius: 4px;
  min-width: 100px;
  position: relative;
}
.metric::before {
  content: '[';
  position: absolute;
  top: 6px;
  left: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
  opacity: 0.35;
}
.metric::after {
  content: ']';
  position: absolute;
  bottom: 6px;
  right: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
  opacity: 0.35;
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--green);
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.status-pulse {
  color: var(--green);
  animation: pulse-dot 2s ease infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.btn-ghost-tech {
  padding: 1.25rem 1.75rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 14px;
  border: 1px solid var(--lightest-navy);
  color: var(--light-slate);
  background: rgba(17, 34, 64, 0.5);
}
.btn-ghost-tech:hover {
  border-color: var(--green);
  color: var(--green);
  background: var(--green-tint);
}

/* Terminal window */
.terminal {
  position: relative;
  background: rgba(17, 34, 64, 0.85);
  border: 1px solid var(--lightest-navy);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(2, 12, 27, 0.5), 0 0 0 1px rgba(100, 255, 218, 0.05);
  backdrop-filter: blur(8px);
  transition: var(--transition);
}
.terminal::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
  pointer-events: none;
  z-index: 1;
}
.terminal::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(100, 255, 218, 0.4), transparent);
}
.terminal:hover {
  border-color: rgba(100, 255, 218, 0.25);
  box-shadow: 0 24px 60px rgba(2, 12, 27, 0.6), 0 0 30px rgba(100, 255, 218, 0.06);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(10, 25, 47, 0.9);
  border-bottom: 1px solid var(--lightest-navy);
}

.terminal-bar .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.terminal-title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
}

.terminal-body {
  position: relative;
  z-index: 2;
  padding: 16px 18px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
}

.terminal-body p { margin: 0 0 4px; }

.t-prompt { color: var(--green); }
.t-path { color: var(--light-slate); }
.t-out { color: var(--slate); }
.t-code { color: var(--light-slate); }
.t-indent { padding-left: 16px; }
.t-key { color: var(--green); }
.t-str { color: #a5d6ff; }

#typeTarget { color: var(--lightest-slate); }

.hero-tagline {
  margin: 0 0 20px;
  font-size: clamp(28px, 6vw, 52px);
  font-weight: 600;
  color: var(--slate);
  line-height: 1.1;
}

.hero-desc {
  margin: 0 0 40px;
  max-width: 540px;
  font-size: 18px;
  line-height: 1.6;
  color: var(--slate);
}

/* ── Section headings (numbered) ── */
.section {
  padding: 100px 0;
}
.section:first-of-type { padding-top: 0; }

.section-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 40px;
  font-size: clamp(22px, 4vw, 26px);
  font-weight: 600;
  color: var(--lightest-slate);
  white-space: nowrap;
}
.section-heading::after {
  content: '';
  display: block;
  width: 300px;
  height: 1px;
  margin-left: 14px;
  background: var(--lightest-navy);
}
@media (max-width: 600px) {
  .section-heading::after { width: 80px; }
}

.section-num {
  font-family: var(--font-mono);
  font-size: clamp(16px, 3vw, 20px);
  font-weight: 400;
  color: var(--green);
}

.section-text {
  font-size: 17px;
  line-height: 1.65;
  color: var(--slate);
  max-width: 640px;
}
.section-text p { margin: 0 0 16px; }
.section-text a {
  color: var(--green);
  display: inline-block;
  position: relative;
}
.section-text a:hover {
  color: var(--green);
}
.section-text a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}
.section-text a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.company-inline { color: var(--lightest-slate); }

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 1.25rem 1.75rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  transition: var(--transition);
}

.btn-outline {
  border: 1px solid var(--green);
  color: var(--green);
  background: transparent;
}
.btn-outline:hover {
  background: var(--green-tint);
  color: var(--green);
}

.btn-solid {
  border: none;
  background: var(--green);
  color: var(--navy);
  font-weight: 600;
}
.btn-solid:hover {
  background: rgba(100, 255, 218, 0.85);
  color: var(--navy);
}

.btn-row { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }

/* ── Tags / tech list ── */
.tech-list, .tag-row, .pill-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.tech-list li, .pill, .tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}

.pill, .tag {
  display: inline-block;
  padding: 4px 0;
}

.tag-green { color: var(--green); }

.live-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--green);
  letter-spacing: 0.08em;
  padding: 3px 8px;
  border: 1px solid rgba(100, 255, 218, 0.35);
  border-radius: 3px;
  background: var(--green-tint);
}

/* Tech chip grid */
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tech-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
  padding: 6px 12px;
  border: 1px solid var(--lightest-navy);
  border-radius: 4px;
  background: rgba(17, 34, 64, 0.6);
  transition: var(--transition);
}
.tech-chip::before {
  content: '>';
  margin-right: 6px;
  color: var(--green);
  opacity: 0.6;
}
.tech-chip:hover {
  color: var(--green);
  border-color: rgba(100, 255, 218, 0.4);
  box-shadow: 0 0 12px rgba(100, 255, 218, 0.1);
}
.tech-chip:hover::before { opacity: 1; }

/* Scroll fade-in */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: none;
}

/* Timeline connector */
.timeline .job-item {
  position: relative;
}
@media (min-width: 700px) {
  .timeline .job-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 64px;
    top: 28px;
    bottom: -28px;
    width: 1px;
    background: linear-gradient(var(--lightest-navy), transparent);
  }
}

/* Glow cards + spotlight */
.glow-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--lightest-navy);
  transition: var(--transition), box-shadow 0.3s ease, transform 0.15s ease;
}
.glow-card::before {
  content: '';
  position: absolute;
  width: 280px;
  height: 280px;
  left: var(--spot-x, 50%);
  top: var(--spot-y, 50%);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(100, 255, 218, 0.12) 0%, transparent 65%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s ease;
  z-index: 0;
}
.glow-card:hover::before { opacity: 1; }
.glow-card > * { position: relative; z-index: 1; }
.glow-card:hover {
  transform: translateY(-6px);
  border-color: rgba(100, 255, 218, 0.35);
  box-shadow: 0 8px 30px rgba(100, 255, 218, 0.08), 0 0 0 1px rgba(100, 255, 218, 0.1);
}

.glow-card.project-card:hover { transform: translateY(-6px); }

.project-folder {
  color: var(--green);
  font-size: 28px;
  font-family: var(--font-mono);
  line-height: 1;
}

/* ── About grid ── */
.about-grid {
  display: grid;
  gap: 50px;
}
@media (min-width: 768px) {
  .about-grid { grid-template-columns: 3fr 2fr; align-items: start; }
}

.about-photo {
  position: relative;
  max-width: 280px;
  margin: 0 auto;
}
.about-photo::before {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid var(--green);
  border-radius: 4px;
  transform: translate(16px, 16px);
  z-index: 0;
}
.about-photo img {
  position: relative;
  z-index: 1;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 4px;
  filter: grayscale(100%);
  transition: var(--transition);
  display: block;
}
.about-photo:hover img { filter: none; }

.about-photo-fallback {
  display: none;
  position: relative;
  z-index: 1;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 4px;
  background: var(--light-navy);
  border: 1px solid var(--lightest-navy);
  place-items: center;
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 600;
  color: var(--green);
}
.about-photo-fallback.visible {
  display: grid;
}
.about-photo img.hidden {
  display: none;
}

.info-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.info-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 12px;
  font-size: 17px;
  color: var(--slate);
  line-height: 1.5;
}
.info-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--green);
}

.about-location {
  margin: 0 0 20px;
}
.about-location li {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--light-slate);
}

/* ── Experience (Brittany style) ── */
.jobs-list { display: flex; flex-direction: column; gap: 40px; }

.job-item {
  display: grid;
  gap: 12px;
}
@media (min-width: 700px) {
  .job-item { grid-template-columns: 130px 1fr; gap: 20px; }
}

.job-date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--slate);
  padding-top: 4px;
}

.job-title {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 500;
  color: var(--lightest-slate);
}
.job-title .company { color: var(--green); }

.job-desc {
  margin: 0;
  padding-left: 20px;
  color: var(--slate);
  font-size: 16px;
}
.job-desc li { margin-bottom: 8px; }

/* ── Featured projects ── */
.projects-grid {
  display: grid;
  gap: 30px;
}
@media (min-width: 768px) {
  .projects-grid { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
}

.project-card {
  position: relative;
  background: var(--light-navy);
  border-radius: 4px;
  padding: 28px 28px 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 100%;
}
.project-card:hover { transform: translateY(-5px); }

.project-card.featured {
  border-top: 2px solid var(--green);
}

.project-card:not(.glow-card).featured {
  border-top: 2px solid var(--green);
}

.project-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.project-links a {
  display: inline-block;
  padding: 4px;
  color: var(--light-slate);
  font-size: 18px;
}
.project-links a:hover { color: var(--green); }

.project-title {
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  color: var(--lightest-slate);
}

.project-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--slate);
  flex: 1;
}

.project-role {
  margin: 0;
  font-size: 14px;
  color: var(--light-slate);
}

/* Academic project cards with image */
.proj-archive {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.proj-archive-card {
  position: relative;
  overflow: hidden;
  background: var(--light-navy);
  border: 1px solid transparent;
  border-radius: 4px;
  transition: var(--transition);
}
.proj-archive-card::before {
  content: '';
  position: absolute;
  width: 240px;
  height: 240px;
  left: var(--spot-x, 50%);
  top: var(--spot-y, 50%);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(100, 255, 218, 0.1) 0%, transparent 65%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s ease;
  z-index: 1;
}
.proj-archive-card:hover::before { opacity: 1; }
.proj-archive-card:hover {
  transform: translateY(-4px);
  border-color: rgba(100, 255, 218, 0.2);
}

.proj-archive-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
  opacity: 0.85;
  transition: var(--transition);
}
.proj-archive-card:hover img { opacity: 1; }

.proj-archive-body { padding: 20px; }

.proj-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--green);
  margin-bottom: 8px;
}

/* ── Research cards ── */
.research-grid {
  display: grid;
  gap: 20px;
}
@media (min-width: 768px) { .research-grid { grid-template-columns: 1fr 1fr; } }

.research-card {
  position: relative;
  overflow: hidden;
  background: var(--light-navy);
  border-radius: 4px;
  padding: 28px;
  border-left: 2px solid var(--lightest-navy);
  transition: var(--transition);
}
.research-card::before {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  left: var(--spot-x, 50%);
  top: var(--spot-y, 50%);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(100, 255, 218, 0.08) 0%, transparent 65%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s ease;
}
.research-card:hover::before { opacity: 1; }
.research-card:hover {
  border-left-color: var(--green);
  box-shadow: 0 8px 24px rgba(2, 12, 27, 0.4);
}
.research-card > * { position: relative; z-index: 1; }

.research-card.active { border-left-color: var(--green); }

.research-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green);
  margin-bottom: 8px;
}

.research-title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 600;
  color: var(--lightest-slate);
}

.research-date {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--slate);
}

.research-text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--slate);
}

/* ── Skills matrix (resume) ── */
.skills-matrix {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}
@media (min-width: 600px) {
  .skills-matrix { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .skills-matrix { grid-template-columns: repeat(3, 1fr); }
}

.skill-category {
  background: var(--light-navy);
  border: 1px solid var(--lightest-navy);
  border-radius: 6px;
  padding: 20px 18px 16px;
  transition: var(--transition);
}
.skill-category:hover {
  border-color: rgba(100, 255, 218, 0.25);
  box-shadow: 0 8px 24px rgba(2, 12, 27, 0.35);
}

.skill-category-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--lightest-navy);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--lightest-slate);
}

.skill-category-num {
  color: var(--green);
  font-weight: 500;
}

.skill-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.skill-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
  background: rgba(10, 25, 47, 0.35);
  border: 1px solid transparent;
  transition: var(--transition);
}
.skill-item:hover {
  color: var(--lightest-slate);
  border-color: rgba(100, 255, 218, 0.2);
  background: rgba(100, 255, 218, 0.05);
}

.skill-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  opacity: 0.85;
  transition: var(--transition);
}
.skill-item:hover .skill-icon {
  opacity: 1;
  transform: scale(1.08);
}

/* ── Awards grid (resume) ── */
.awards-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .awards-grid { grid-template-columns: repeat(3, 1fr); }
}

.award-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: var(--light-navy);
  border: 1px solid var(--lightest-navy);
  border-top: 2px solid var(--green);
  border-radius: 6px;
  padding: 22px 20px;
  transition: var(--transition);
}
.award-card:hover {
  transform: translateY(-4px);
  border-color: rgba(100, 255, 218, 0.25);
  box-shadow: 0 10px 28px rgba(2, 12, 27, 0.4);
}

.award-icon-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background: rgba(100, 255, 218, 0.08);
  border: 1px solid rgba(100, 255, 218, 0.2);
}

.award-icon {
  display: block;
  width: 28px;
  height: 28px;
}

.award-title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--lightest-slate);
  line-height: 1.3;
}

.award-meta {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--green);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.award-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--slate);
}

/* ── Resume sidebar ── */
.resume-layout {
  display: grid;
  gap: 40px;
  padding-top: 40px;
}
@media (min-width: 900px) {
  .resume-layout {
    grid-template-columns: 280px 1fr;
    align-items: start;
  }
}

.resume-side {
  position: relative;
  z-index: 1;
}

@media (min-width: 900px) {
  .resume-side {
    position: sticky;
    top: calc(var(--nav-scroll-height) + 30px);
    align-self: start;
    max-height: calc(100vh - var(--nav-scroll-height) - 40px);
    overflow-y: auto;
    padding-bottom: 8px;
  }
}

.resume-main {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.resume-side h1 {
  margin: 0 0 12px;
  font-size: 28px;
  font-weight: 600;
  color: var(--lightest-slate);
}

.resume-side p {
  margin: 0 0 24px;
  font-size: 16px;
  color: var(--slate);
  line-height: 1.6;
}

.contact-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }

.contact-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--light-slate);
  word-break: break-all;
}
.contact-link:hover { color: var(--green); }

/* ── Cert grid ── */
.cert-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.cert-card {
  position: relative;
  overflow: hidden;
  background: var(--light-navy);
  border: 1px solid transparent;
  border-radius: 4px;
  transition: var(--transition);
}
.cert-card::before {
  content: '';
  position: absolute;
  width: 240px;
  height: 240px;
  left: var(--spot-x, 50%);
  top: var(--spot-y, 50%);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(100, 255, 218, 0.1) 0%, transparent 65%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s ease;
  z-index: 1;
}
.cert-card:hover::before { opacity: 1; }
.cert-card:hover {
  transform: translateY(-4px);
  border-color: rgba(100, 255, 218, 0.2);
}

.cert-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  opacity: 0.8;
  transition: var(--transition);
}
.cert-card:hover img { opacity: 1; }

.cert-body { padding: 20px; }
.cert-title { margin: 0 0 6px; font-size: 16px; font-weight: 600; color: var(--lightest-slate); }
.cert-meta { margin: 0; font-family: var(--font-mono); font-size: 12px; color: var(--slate); }

/* ── Page header (inner pages) ── */
.page-hero {
  padding: 60px 0 40px;
}

.page-path {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
}
.page-path-cmd {
  color: var(--light-slate);
  margin-left: 8px;
}
.page-path-cmd::before {
  content: '$ ';
  color: var(--green);
}

.page-hero h1 {
  margin: 10px 0 16px;
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 600;
  color: var(--lightest-slate);
}

.page-hero p {
  margin: 0;
  max-width: 540px;
  font-size: 17px;
  color: var(--slate);
}

/* ── Footer ── */
.site-footer {
  text-align: center;
  padding: 20px 25px 60px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
  line-height: 1.6;
}
.site-footer a { color: var(--green); }
.site-footer a:hover { text-decoration: underline; }

.sys-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  margin-bottom: 20px;
  padding: 10px 16px;
  border: 1px solid var(--lightest-navy);
  border-radius: 4px;
  background: rgba(17, 34, 64, 0.5);
  font-size: 11px;
  color: var(--slate);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}
.sys-key {
  color: var(--green);
  margin-right: 6px;
}
.sys-key::after { content: ':'; }

.footer-badge {
  margin: 0 auto 24px;
  max-width: 255px;
}
.footer-badge a {
  display: inline-block;
  line-height: 0;
  opacity: 0.85;
  transition: var(--transition);
}
.footer-badge a:hover {
  opacity: 1;
  transform: translateY(-2px);
  text-decoration: none;
}
.footer-badge img {
  display: block;
  width: 100%;
  max-width: 255px;
  height: auto;
}

/* ── Loader ── */
.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  background: var(--navy);
  transition: opacity 0.35s ease;
}
.page-loader.hidden { opacity: 0; pointer-events: none; }

.loader-panel {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--slate);
  text-align: left;
}
.loader-line { margin: 0 0 8px; }
.loader-done { color: var(--green); }

@media (max-width: 768px) {
  :root { --side-padding: 25px; }
  body { font-size: 16px; }
  .section { padding: 70px 0; }
  .section-heading::after { width: 60px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  .fade-up { opacity: 1; transform: none; }
  body.mouse-fx { cursor: auto; }
  body.mouse-fx a,
  body.mouse-fx button,
  body.mouse-fx .btn { cursor: pointer; }
  .cursor-glow,
  .cursor-dot,
  .cursor-ring { display: none !important; }
  .tilt-card { transform: none !important; }
}