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

:root {
  --navy: #0A1628;
  --navy-mid: #111f3a;
  --slate: #1E2D4A;
  --teal: #00D4C8;
  --teal-dim: rgba(0,212,200,0.12);
  --teal-dim2: rgba(0,212,200,0.06);
  --amber: #F5A623;
  --off-white: #E8E4DC;
  --muted: #7A8BA6;
  --rule: rgba(0,212,200,0.18);
  --rule-soft: rgba(0,212,200,0.09);
  --mat: #16233d;
  --mat-cap: #131f36;
  --prose: #9FB0C9;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Space Mono', monospace;
}

html { scroll-behavior: smooth; }
body { background: var(--navy); color: var(--off-white); font-family: var(--font-body); font-size: 16px; line-height: 1.6; overflow-x: hidden; }

/* 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 3rem; background: rgba(10,22,40,0.85); backdrop-filter: blur(12px); border-bottom: 1px solid var(--rule); }
.nav-logo { font-family: var(--font-mono); font-size: 0.85rem; color: var(--teal); letter-spacing: 0.08em; text-decoration: none; }
.nav-links { display: flex; gap: 2.2rem; list-style: none; }
.nav-links a { font-family: var(--font-body); font-size: 0.82rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); text-decoration: none; transition: color 0.2s; cursor: pointer; }
.nav-links a:hover { color: var(--teal); }

/* HERO */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 8rem 3rem 4rem; overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(0,212,200,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(0,212,200,0.04) 1px, transparent 1px); background-size: 48px 48px; mask-image: radial-gradient(ellipse 80% 80% at 50% 40%, black 30%, transparent 80%); pointer-events: none; }
.hero::after { content: ''; position: absolute; inset: 0; background-image: linear-gradient(rgba(0,212,200,0.09) 1px, transparent 1px), linear-gradient(90deg, rgba(0,212,200,0.09) 1px, transparent 1px); background-size: 240px 240px; mask-image: radial-gradient(ellipse 80% 80% at 50% 40%, black 30%, transparent 80%); pointer-events: none; }
.hero-inner { position: relative; z-index: 1; max-width: 1100px; margin: 0 auto; width: 100%; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4rem; align-items: end; }
.hero-eyebrow { font-family: var(--font-mono); font-size: 0.75rem; color: var(--teal); letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 1.8rem; display: flex; align-items: center; gap: 0.8rem; }
.hero-eyebrow::before { content: ''; display: inline-block; width: 32px; height: 1px; background: var(--teal); }
.hero-name { font-family: var(--font-display); font-size: clamp(3.5rem, 8vw, 7rem); font-weight: 700; line-height: 0.95; letter-spacing: -0.03em; color: var(--off-white); margin-bottom: 0.3rem; }
.hero-name .accent { color: var(--teal); }
.hero-title { font-family: var(--font-display); font-size: clamp(1rem, 2.5vw, 1.5rem); font-weight: 300; color: var(--muted); margin-bottom: 2.4rem; }
.hero-desc { max-width: 540px; font-size: 1.02rem; line-height: 1.8; color: var(--prose); margin-bottom: 3rem; font-weight: 400; }
.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; }
.btn-primary { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.85rem 2rem; background: var(--teal); color: var(--navy); font-family: var(--font-display); font-size: 0.85rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none; transition: opacity 0.2s, transform 0.2s; }
.btn-primary:hover { opacity: 0.88; transform: translateY(-1px); }
.btn-ghost { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.85rem 2rem; border: 1px solid var(--rule); color: var(--off-white); font-family: var(--font-display); font-size: 0.85rem; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none; transition: border-color 0.2s, color 0.2s; }
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); }
.hero-stats { display: flex; flex-direction: column; gap: 1.4rem; min-width: 150px; padding-left: 2.5rem; border-left: 1px solid var(--rule); }
.stat { text-align: right; }
.stat-num { font-family: var(--font-display); font-size: 2rem; font-weight: 700; color: var(--off-white); line-height: 1; }
.stat-label { font-family: var(--font-mono); font-size: 0.65rem; color: var(--muted); letter-spacing: 0.15em; text-transform: uppercase; }
.stat-divider { width: 100%; height: 1px; background: var(--rule); }

/* SECTIONS */
section { padding: 6rem 3rem; max-width: 1100px; margin: 0 auto; }
.section-header { display: flex; align-items: flex-start; gap: 2rem; margin-bottom: 4rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--rule); }
.section-index { font-family: var(--font-mono); font-size: 0.7rem; color: var(--teal); letter-spacing: 0.15em; margin-top: 0.3rem; flex-shrink: 0; }
.section-title { font-family: var(--font-display); font-size: clamp(1.8rem, 4vw, 2.6rem); font-weight: 700; color: var(--off-white); letter-spacing: -0.02em; line-height: 1.1; }
#internships, #projects, #research, #fabrication, #skills { border-top: 1px solid var(--rule); }

/* INTERNSHIPS */
.internship-grid { display: flex; flex-direction: column; gap: 0; }
.internship-item { display: grid; grid-template-columns: 1fr 2.5fr; gap: 3rem; padding: 2.5rem 0; border-bottom: 1px solid var(--rule); transition: background 0.2s; position: relative; }
.internship-item:hover { background: var(--teal-dim2); }
.internship-item:hover .internship-company { color: var(--teal); }
.intern-logo-wrap { margin-bottom: 1rem; }
.intern-logo-img { height: 48px; width: auto; max-width: 180px; display: block; object-fit: contain; border-radius: 4px; }
.intern-logo-white { background: white; padding: 6px 10px; border-radius: 4px; }
.internship-company { font-family: var(--font-display); font-size: 1.15rem; font-weight: 600; color: var(--off-white); margin-bottom: 0.2rem; transition: color 0.2s; }
.internship-role { font-family: var(--font-mono); font-size: 0.7rem; color: var(--teal); letter-spacing: 0.12em; text-transform: uppercase; }
.internship-dates { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); letter-spacing: 0.12em; text-transform: uppercase; margin-top: 0.3rem; }
.internship-body { font-size: 0.95rem; line-height: 1.75; color: var(--prose); font-weight: 400; }
.intern-feature-img { margin-top: 1.2rem; grid-column: 1 / -1; }
.intern-feature-img img { width: 100%; height: 220px; object-fit: cover; object-position: center 40%; display: block; border: 1px solid var(--rule); }
.intern-feature-caption { font-family: var(--font-body); font-size: 0.78rem; font-weight: 300; color: var(--muted); line-height: 1.5; padding: 0.6rem 0.75rem 0.6rem 1rem; background: var(--mat-cap); border: 1px solid var(--rule); border-top: none; position: relative; }
.intern-feature-caption::before { content: ''; position: absolute; left: 0; top: 0.65rem; bottom: 0.65rem; width: 2px; background: var(--teal); opacity: 0.55; }

/* PROJECTS */
.projects-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.project-card { background: var(--slate); padding: 2.5rem; position: relative; overflow: hidden; transition: transform 0.25s; cursor: pointer; }
.project-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--teal); transform: scaleX(0); transform-origin: left; transition: transform 0.3s; }
.project-card:hover { transform: translateY(-3px); }
.project-card:hover::before { transform: scaleX(1); }
.project-tag { font-family: var(--font-mono); font-size: 0.65rem; color: var(--teal); letter-spacing: 0.15em; text-transform: uppercase; margin-bottom: 1rem; }
.project-name { font-family: var(--font-display); font-size: 1.35rem; font-weight: 600; color: var(--off-white); margin-bottom: 0.8rem; letter-spacing: -0.01em; line-height: 1.25; }
.project-desc { font-size: 0.92rem; line-height: 1.7; color: var(--prose); font-weight: 400; }
.project-link { display: inline-flex; align-items: center; gap: 0.4rem; margin-top: 1.4rem; background: none; border: none; cursor: pointer; font-family: var(--font-mono); font-size: 0.72rem; color: var(--teal); letter-spacing: 0.12em; text-transform: uppercase; padding: 0; transition: gap 0.2s, opacity 0.2s; }
.project-link:hover { gap: 0.7rem; opacity: 0.8; }
.project-corner { position: absolute; bottom: 1.5rem; right: 1.5rem; width: 24px; height: 24px; border-right: 1px solid var(--teal); border-bottom: 1px solid var(--teal); opacity: 0.3; transition: opacity 0.2s; }
.project-card:hover .project-corner { opacity: 1; }

/* RESEARCH */
.research-list { display: flex; flex-direction: column; gap: 2px; }
.research-item { display: grid; grid-template-columns: auto 1fr; gap: 0; background: var(--slate); }
.research-accent { width: 4px; background: var(--teal); opacity: 0.5; transition: opacity 0.2s; }
.research-item:hover .research-accent { opacity: 1; }
.research-content { padding: 2rem; }
.research-field { font-family: var(--font-mono); font-size: 0.65rem; color: var(--amber); letter-spacing: 0.15em; text-transform: uppercase; margin-bottom: 0.6rem; }
.research-title { font-family: var(--font-display); font-size: 1.2rem; font-weight: 600; color: var(--off-white); margin-bottom: 0.8rem; letter-spacing: -0.01em; }
.research-desc { font-size: 0.92rem; line-height: 1.7; color: var(--prose); font-weight: 400; }
.research-link { display: inline-flex; align-items: center; gap: 0.4rem; margin-top: 1rem; background: none; border: none; cursor: pointer; font-family: var(--font-mono); font-size: 0.72rem; color: var(--amber); letter-spacing: 0.12em; text-transform: uppercase; padding: 0; transition: gap 0.2s, opacity 0.2s; }
.research-link:hover { gap: 0.7rem; opacity: 0.8; }

/* FABRICATION */
.fab-intro { font-size: 1rem; line-height: 1.8; color: var(--prose); max-width: 620px; margin-bottom: 3rem; font-weight: 400; }
.fab-items { display: grid; grid-template-columns: repeat(5, 1fr); gap: 2px; }
.fab-item { background: var(--slate); padding: 2rem; position: relative; overflow: hidden; cursor: pointer; transition: transform 0.2s; }
.fab-item:hover { transform: translateY(-2px); }
.fab-item::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, var(--teal), transparent); transform: scaleX(0); transform-origin: left; transition: transform 0.3s; }
.fab-item:hover::after { transform: scaleX(1); }
.fab-num { font-family: var(--font-mono); font-size: 2rem; font-weight: 700; color: var(--teal); opacity: 0.18; line-height: 1; margin-bottom: 0.8rem; }
.fab-name { font-family: var(--font-display); font-size: 1rem; font-weight: 600; color: var(--off-white); margin-bottom: 0.4rem; }
.fab-detail { font-size: 0.85rem; color: var(--prose); line-height: 1.65; font-weight: 400; }
.fab-link { display: inline-flex; align-items: center; gap: 0.4rem; margin-top: 1rem; background: none; border: none; cursor: pointer; font-family: var(--font-mono); font-size: 0.68rem; color: var(--teal); letter-spacing: 0.12em; text-transform: uppercase; padding: 0; transition: gap 0.2s, opacity 0.2s; }
.fab-link:hover { gap: 0.7rem; opacity: 0.8; }

/* SKILLS */
.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.skill-group-label { font-family: var(--font-mono); font-size: 0.65rem; color: var(--teal); letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--rule); }
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.skill-tag { padding: 0.3rem 0.75rem; border: 1px solid var(--rule); font-size: 0.78rem; color: var(--muted); font-family: var(--font-body); font-weight: 400; transition: border-color 0.2s, color 0.2s; cursor: default; }
.skill-tag:hover { border-color: var(--teal); color: var(--off-white); }

/* FOOTER */
footer { border-top: 1px solid var(--rule); padding: 3rem; max-width: 1100px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.footer-name { font-family: var(--font-display); font-size: 1rem; font-weight: 600; color: var(--off-white); }
.footer-sub { font-family: var(--font-mono); font-size: 0.65rem; color: var(--muted); letter-spacing: 0.1em; margin-top: 0.2rem; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted); text-decoration: none; letter-spacing: 0.1em; text-transform: uppercase; transition: color 0.2s; }
.footer-links a:hover { color: var(--teal); }

/* PROJECT PAGES */
#project-pages { position: fixed; inset: 0; z-index: 300; pointer-events: none; }
.proj-page { position: absolute; inset: 0; background: var(--navy); overflow-y: auto; opacity: 0; transform: translateX(40px); transition: opacity 0.35s ease, transform 0.35s ease; pointer-events: none; }
.proj-page.active { opacity: 1; transform: none; pointer-events: all; }
.pp-nav { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 1.5rem; padding: 1.1rem 3rem; background: rgba(10,22,40,0.92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--rule); }
.pp-back { background: none; border: none; cursor: pointer; font-family: var(--font-mono); font-size: 0.72rem; color: var(--teal); letter-spacing: 0.1em; text-transform: uppercase; transition: opacity 0.2s; flex-shrink: 0; }
.pp-back:hover { opacity: 0.7; }
.pp-nav-title { font-family: var(--font-display); font-size: 0.9rem; font-weight: 500; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pp-inner { max-width: 900px; margin: 0 auto; padding: 4rem 3rem 6rem; }
.pp-hero { margin-bottom: 3rem; }
.pp-tag { font-family: var(--font-mono); font-size: 0.68rem; color: var(--teal); letter-spacing: 0.18em; text-transform: uppercase; margin-bottom: 0.8rem; display: flex; align-items: center; gap: 0.6rem; }
.pp-tag::before { content: ''; display: inline-block; width: 24px; height: 1px; background: var(--teal); }
.pp-title { font-family: var(--font-display); font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; color: var(--off-white); letter-spacing: -0.03em; line-height: 1.05; margin-bottom: 0.8rem; }
.pp-status { display: inline-block; padding: 0.25rem 0.85rem; background: var(--teal-dim); border: 1px solid var(--teal); font-family: var(--font-mono); font-size: 0.65rem; color: var(--teal); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 1.5rem; }
.pp-status-done { background: rgba(245,166,35,0.1); border-color: var(--amber); color: var(--amber); }
.pp-lead { font-size: 1.12rem; line-height: 1.75; color: var(--prose); font-weight: 400; max-width: 680px; border-left: 2px solid var(--teal); padding-left: 1.4rem; }
.pp-section-label { font-family: var(--font-mono); font-size: 0.65rem; color: var(--amber); letter-spacing: 0.2em; text-transform: uppercase; margin: 2.5rem 0 0.9rem; padding-bottom: 0.6rem; border-bottom: 1px solid var(--rule); }
.pp-subsection-label { font-family: var(--font-display); font-size: 0.95rem; font-weight: 600; color: var(--off-white); margin: 2rem 0 0.8rem; letter-spacing: -0.01em; }
.pp-text { font-size: 1rem; line-height: 1.8; color: var(--prose); font-weight: 400; margin-bottom: 1rem; max-width: 72ch; }
.pp-muted-note { font-size: 0.82rem; font-style: italic; opacity: 0.6; margin-bottom: 1.2rem; }
.pp-bullets { list-style: none; padding: 0; margin: 0; }
.pp-bullets li { font-size: 0.95rem; line-height: 1.75; color: var(--prose); font-weight: 400; padding: 0.6rem 0 0.6rem 1.5rem; position: relative; border-bottom: 1px solid var(--rule-soft); }
.pp-bullets li::before { content: '→'; position: absolute; left: 0; color: var(--teal); font-size: 0.75rem; top: 0.6rem; }
.pp-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pp-chip { padding: 0.3rem 0.85rem; border: 1px solid var(--rule); font-size: 0.78rem; color: var(--muted); font-family: var(--font-body); transition: border-color 0.2s, color 0.2s; }
.pp-chip:hover { border-color: var(--teal); color: var(--off-white); }
.pp-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-top: 0.5rem; }
.pp-gallery-3 { grid-template-columns: 1fr 1fr; }
.pp-gallery-single { grid-template-columns: 1fr; }
.pp-img-slot img { width: 100%; height: 340px; object-fit: contain; object-position: center; background: var(--mat); display: block; border: 1px solid var(--rule); padding: 10px; }
.pp-img-wide { grid-column: 1 / -1; }
.pp-img-wide img { height: 480px !important; }
.pp-img-placeholder { width: 100%; height: 260px; background: var(--slate); border: 1px dashed rgba(0,212,200,0.25); display: flex; flex-direction: column; align-items: center; justify-content: center; font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); letter-spacing: 0.08em; text-align: center; gap: 0.3rem; }
.pp-img-placeholder span { font-size: 0.65rem; opacity: 0.5; letter-spacing: 0.12em; text-transform: uppercase; }
.pp-img-caption { font-family: var(--font-body); font-size: 0.78rem; font-weight: 300; color: var(--muted); line-height: 1.5; letter-spacing: 0; padding: 0.6rem 0.75rem 0.6rem 1rem; background: var(--mat-cap); border: 1px solid var(--rule); border-top: none; position: relative; }
.pp-img-caption::before { content: ''; position: absolute; left: 0; top: 0.65rem; bottom: 0.65rem; width: 2px; background: var(--teal); opacity: 0.55; }
.pp-log { display: flex; flex-direction: column; gap: 0; }
.pp-log-entry { display: grid; grid-template-columns: 180px 1fr; gap: 1.5rem; padding: 1.2rem 0; border-bottom: 1px solid var(--rule); }
.pp-log-placeholder { opacity: 0.5; }
.pp-log-date { font-family: var(--font-mono); font-size: 0.68rem; color: var(--teal); letter-spacing: 0.1em; padding-top: 0.1rem; flex-shrink: 0; }
.pp-log-text { font-size: 0.94rem; line-height: 1.7; color: var(--prose); font-weight: 400; }
.pp-download-btn { display: inline-flex; align-items: center; gap: 0.6rem; margin-top: 0.8rem; padding: 0.75rem 1.5rem; background: var(--teal-dim); border: 1px solid var(--teal); color: var(--teal); font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; text-decoration: none; transition: background 0.2s, color 0.2s; }
.pp-download-btn:hover { background: var(--teal); color: var(--navy); }

/* AWARDS BOX */
.pp-awards-box { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin: 1.5rem 0; }
.pp-award-item { background: var(--slate); border: 1px solid var(--rule); padding: 1rem 1.2rem; display: flex; align-items: center; gap: 1rem; }
.pp-award-top { border-color: var(--amber); background: rgba(245,166,35,0.08); }
.pp-award-year { font-family: var(--font-mono); font-size: 0.75rem; color: var(--teal); font-weight: 700; flex-shrink: 0; }
.pp-award-top .pp-award-year { color: var(--amber); }
.pp-award-desc { font-size: 0.85rem; color: var(--off-white); font-weight: 500; line-height: 1.4; }

/* CONTACT PAGE */
.contact-card { display: flex; align-items: center; gap: 2rem; background: var(--slate); border: 1px solid var(--rule); padding: 2rem; width: 100%; margin: 1.5rem 0; }
.contact-photo { width: 140px; height: 140px; border-radius: 50%; object-fit: cover; object-position: center top; border: 2px solid var(--teal); flex-shrink: 0; }
.contact-card-name { font-family: var(--font-display); font-size: 1.8rem; font-weight: 700; color: var(--off-white); letter-spacing: -0.02em; margin-bottom: 0.4rem; }
.contact-card-school { font-family: var(--font-mono); font-size: 0.72rem; color: var(--teal); letter-spacing: 0.1em; text-transform: uppercase; line-height: 1.6; }
.contact-info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; margin-top: 0.5rem; }
.contact-info-item { background: var(--slate); border: 1px solid var(--rule); padding: 1.2rem 1.4rem; display: flex; align-items: center; gap: 1rem; text-decoration: none; transition: border-color 0.2s; }
.contact-info-item:hover { border-color: var(--teal); }
.contact-info-icon { font-family: var(--font-display); font-size: 1.2rem; color: var(--teal); width: 28px; text-align: center; flex-shrink: 0; }
.contact-info-label { font-family: var(--font-mono); font-size: 0.62rem; color: var(--muted); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 0.2rem; }
.contact-info-value { font-family: var(--font-display); font-size: 0.9rem; font-weight: 500; color: var(--off-white); }

/* SCROLL ANIMATIONS */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* RESPONSIVE */
@media (max-width: 768px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { gap: 1.2rem; }
  section { padding: 4rem 1.5rem; }
  .hero { padding: 7rem 1.5rem 10rem; }
  .hero-stats { position: static; flex-direction: row; margin-top: 3rem; gap: 2rem; }
  .stat { text-align: left; }
  .stat-divider { display: none; }
  .internship-item { grid-template-columns: 1fr; gap: 0.8rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .fab-items { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; align-items: flex-start; }
  .pp-inner { padding: 2.5rem 1.5rem 5rem; }
  .pp-nav { padding: 1rem 1.5rem; }
  .pp-gallery { grid-template-columns: 1fr; }
  .pp-log-entry { grid-template-columns: 1fr; gap: 0.4rem; }
  .contact-card { flex-direction: column; text-align: center; }
  .contact-info-grid { grid-template-columns: 1fr; }
}

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

/* ── FOCUS & SELECTION ─────────────────────────────────────── */
:focus { outline: none; }
:focus-visible,
[role="button"]:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}
.project-card:focus-visible,
.fab-item:focus-visible,
.internship-item:focus-visible,
.research-item:focus-visible { outline-offset: -2px; }
::selection { background: var(--teal); color: var(--navy); }

/* Skip link: keyboard users shouldn't tab the whole nav to reach content. */
.skip-link {
  position: absolute; top: -100%; left: 1rem; z-index: 500;
  padding: 0.7rem 1.2rem; background: var(--teal); color: var(--navy);
  font-family: var(--font-display); font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase; text-decoration: none;
}
.skip-link:focus { top: 1rem; }

/* ── REFINED INTERACTION ───────────────────────────────────── */
.project-card, .fab-item { transition: transform 0.3s var(--ease), background 0.3s var(--ease); }
.project-card:hover, .fab-item:hover { background: var(--mat); }
.internship-item { transition: background 0.3s var(--ease); }
.pp-img-slot img { transition: border-color 0.3s var(--ease); }
.pp-img-slot:hover img { border-color: rgba(0,212,200,0.4); }
.pp-chip, .skill-tag { transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background 0.25s var(--ease); }
.pp-chip:hover, .skill-tag:hover { background: var(--teal-dim2); }

/* Custom scrollbar inside project pages, tuned to the palette. */
.proj-page { scrollbar-width: thin; scrollbar-color: var(--slate) var(--navy); }
.proj-page::-webkit-scrollbar { width: 10px; }
.proj-page::-webkit-scrollbar-track { background: var(--navy); }
.proj-page::-webkit-scrollbar-thumb { background: var(--slate); border: 2px solid var(--navy); }
.proj-page::-webkit-scrollbar-thumb:hover { background: var(--teal-dim); }

/* ── PRINT ─────────────────────────────────────────────────── */
@media print {
  nav, .hero-ctas, .pp-nav, .skip-link, footer .footer-links, video { display: none !important; }
  body { background: #fff; color: #111; }
  .hero { min-height: auto; padding: 2rem 0; }
  .hero::before, .hero::after { display: none; }
  .hero-name, .section-title, .pp-title, .project-name, .internship-company { color: #111; }
  .hero-desc, .pp-text, .pp-lead, .project-desc, .internship-body, .pp-bullets li { color: #333; }
  .project-card, .fab-item, .research-item, .contact-card, .contact-info-item, .pp-award-item { background: #f4f4f4; border: 1px solid #ccc; }
  .proj-page { position: static; opacity: 1; transform: none; overflow: visible; page-break-before: always; }
  #project-pages { position: static; }
  .pp-img-slot img { height: auto; max-height: 420px; background: #fff; border: 1px solid #ccc; }
  .pp-img-caption, .intern-feature-caption { background: #f4f4f4; color: #333; }
  .reveal { opacity: 1 !important; transform: none !important; }
  a { text-decoration: underline; }
}

/* Hero stats sit on the content grid, not the viewport edge. */
.hero-stats .stat-divider { background: var(--rule-soft); }
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-stats { flex-direction: row; align-items: flex-end; gap: 2.5rem; padding-left: 0; padding-top: 2rem; border-left: none; border-top: 1px solid var(--rule); }
  .hero-stats .stat { text-align: left; }
  .hero-stats .stat-divider { display: none; }
}
.proj-page:focus { outline: none; }

/* ── MOBILE NAV ────────────────────────────────────────────── */
.nav-toggle { display: none; background: none; border: 1px solid var(--rule); cursor: pointer; padding: 0.55rem 0.6rem; gap: 4px; flex-direction: column; justify-content: center; align-items: center; width: 40px; height: 36px; }
.nav-toggle span { display: block; width: 18px; height: 1.5px; background: var(--teal); transition: transform 0.3s var(--ease), opacity 0.2s var(--ease); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

@media (max-width: 860px) {
  nav { padding: 0.9rem 1.5rem; }
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; gap: 0; align-items: stretch;
    background: var(--navy);
    border-bottom: 1px solid var(--rule);
    box-shadow: 0 18px 40px rgba(3,8,18,0.55);
    max-height: 0; overflow: hidden; transition: max-height 0.35s var(--ease);
  }
  .nav-links.open { max-height: 70vh; }
  .nav-links li { border-top: 1px solid var(--rule-soft); }
  .nav-links a { display: block; padding: 1rem 1.5rem; font-size: 0.85rem; }
}

/* ── MOBILE GALLERIES ──────────────────────────────────────── */
@media (max-width: 768px) {
  /* Inline grid-template-columns on the galleries would otherwise win. */
  .pp-gallery { grid-template-columns: 1fr !important; }
  /* Natural height on small screens: the artwork fills the width, no matting. */
  .pp-img-slot img,
  .pp-img-wide img { height: auto !important; max-height: 72vh; padding: 6px; }
  .pp-inner { padding: 2.5rem 1.25rem 5rem; }
  .pp-log-entry { grid-template-columns: 1fr; }
  .pp-awards-box, .contact-info-grid { grid-template-columns: 1fr; }
}