/* ============================================================
     TOKENS
     ============================================================ */
  :root{
    --bg: #F4F6FB;
    --panel: #FFFFFF;
    --panel-2: #EDF0F8;
    --silk: #0F1626;
    --silk-dim: #4B546B;
    --copper: #3355DD;
    --copper-bright: #2946C4;
    --muted: #7C87A3;
    --line: rgba(51,85,221,0.25);
    --line-faint: rgba(15,22,38,0.08);
    --radius: 2px;
    --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, monospace;
    --sans: 'IBM Plex Sans', -apple-system, sans-serif;
    --resume-font: Calibri, Georgia, 'Times New Roman', serif;
  }

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

  html{ scroll-behavior: smooth; }
  @media (prefers-reduced-motion: reduce){
    html{ scroll-behavior: auto; }
    *{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  }

  body{
    background:
      radial-gradient(circle at 1px 1px, rgba(15,22,38,0.05) 1px, transparent 0) 0 0/28px 28px,
      var(--bg);
    color: var(--silk);
    font-family: var(--sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

  a{ color: var(--copper-bright); text-decoration: none; }
  a:hover{ text-decoration: underline; }
  a:focus-visible, button:focus-visible{
    outline: 2px solid var(--copper-bright);
    outline-offset: 3px;
  }

  .wrap{ max-width: 980px; margin: 0 auto; padding: 0 24px; }

  .eyebrow{
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--copper);
  }

  h1, h2, h3{
    font-family: var(--mono);
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--silk);
  }

  /* ============================================================
     NAV
     ============================================================ */
  header.site-nav{
    position: sticky; top: 0; z-index: 50;
    background: rgba(244,246,251,0.86);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line-faint);
  }
  .nav-inner{
    display:flex; align-items:center; justify-content:space-between;
    padding: 14px 24px;
    max-width: 980px; margin: 0 auto;
  }
  .nav-mark{
    font-family: var(--mono); font-size: 13px; font-weight: 600;
    color: var(--silk); display:flex; align-items:center; gap:8px;
  }
  .nav-mark .dot{ width:7px; height:7px; background: var(--copper-bright); border-radius:50%; }
  .nav-links{ display:flex; gap: 22px; font-family: var(--mono); font-size: 12px; }
  .nav-links a{ color: var(--silk-dim); }
  .nav-links a:hover{ color: var(--copper-bright); text-decoration: none; }

  /* ============================================================
     HERO
     ============================================================ */
  .hero{
    position: relative;
    left: 50%;
    width: 100vw;
    margin-left: -50vw;
    padding: 24px 0;
    background: #16233F;
  }
  .hero-inner{
    max-width: 980px;
    margin: 0 auto;
    padding: 0 24px;
  }
  .hero-banner{
    position: relative;
    width: 100%;
    min-height: clamp(260px, 32vw, 340px);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    align-items: center;
    padding: 32px;
  }
  .hero-bg-carousel{ position: absolute; inset: 0; z-index: 0; }
  .hero-bg-slide{
    position: absolute; inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.2s ease;
  }
  .hero-bg-slide.is-active{ opacity: 1; }
  .hero-text{
    position: relative;
    z-index: 1;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px 28px;
  }
  .hero h1{
    font-size: clamp(34px, 6vw, 56px);
    line-height: 1.05;
    max-width: 14ch;
    color: #16233F;
  }
  .hero .role{
    margin-top: 14px;
    font-family: var(--sans);
    font-size: 17px;
    color: var(--silk-dim);
    max-width: 46ch;
  }
  .hero .role strong{ color: var(--silk); font-weight: 600; }

  /* ============================================================
     SECTION HEADERS
     ============================================================ */
  .section{ padding: 72px 0; border-bottom: 1px solid var(--line-faint); }
  .section:last-of-type{ border-bottom: none; }
  .section-head{
    display:flex; align-items: baseline; gap: 14px;
    margin-bottom: 40px;
  }
  .section-head h2{ font-size: 22px; }
  .section-head .rule{ flex:1; height:1px; background: var(--line-faint); }
  .section-head .count{ font-family: var(--mono); font-size: 12px; color: var(--muted); }

  /* ============================================================
     PROJECT SHEETS
     ============================================================ */
  .sheet{
    border: 1px solid var(--line-faint);
    border-radius: var(--radius);
    background: linear-gradient(180deg, var(--panel), var(--panel-2));
    margin-bottom: 28px;
    overflow: hidden;
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.6s ease, transform 0.6s ease;
  }
  .sheet.is-visible{ opacity: 1; transform: translateY(0); }

  .sheet-media{
    position: relative;
    aspect-ratio: 16 / 8;
    border-bottom: 1px dashed var(--line);
    overflow: hidden;
    background: var(--panel-2);
  }

  /* carousel — click-through slides inside a .sheet-media box */
  .carousel-slide{
    position: absolute; inset: 0;
    display:flex; align-items:center; justify-content:center;
    flex-direction: column; gap: 6px;
    opacity: 0; pointer-events: none;
    transition: opacity 0.4s ease;
  }
  .carousel-slide.is-active{ opacity: 1; pointer-events: auto; }
  .carousel-slide img{ width: 100%; height: 100%; object-fit: contain; display: block; cursor: pointer; }
  .carousel-slide video{ width: 100%; height: 100%; object-fit: contain; display: block; }
  .carousel-slide.placeholder{
    background:
      radial-gradient(circle at 1px 1px, rgba(108,140,255,0.18) 1px, transparent 0) 0 0/22px 22px;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 11px;
    text-align: center;
    padding: 20px;
  }
  .carousel-slide .tag{
    font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
    border: 1px dashed var(--line); padding: 3px 8px; border-radius: var(--radius);
  }
  .carousel.has-multiple .carousel-slide{ cursor: pointer; }

  .carousel-btn{
    position: absolute; top: 50%; transform: translateY(-50%);
    width: 30px; height: 30px; border-radius: 50%;
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.88);
    color: var(--silk);
    font-family: var(--mono); font-size: 15px; line-height: 1;
    display:flex; align-items:center; justify-content:center;
    cursor: pointer; z-index: 2;
  }
  .carousel-btn:hover{ background: var(--panel); }
  .carousel-btn.prev{ left: 12px; }
  .carousel-btn.next{ right: 12px; }

  .carousel-dots{
    position: absolute; bottom: 12px; left: 50%; transform: translateX(-50%);
    display:flex; gap: 6px; z-index: 2;
  }
  .carousel-dots .dot{
    width: 7px; height: 7px; border-radius: 50%; padding: 0;
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.7);
    cursor: pointer;
  }
  .carousel-dots .dot.is-active{ background: var(--copper-bright); border-color: var(--copper-bright); }

  /* lightbox — full-size view opened by clicking a carousel image */
  .lightbox{
    position: fixed; inset: 0; z-index: 1000;
    background: rgba(15,22,38,0.86);
    display:flex; align-items:center; justify-content:center;
    padding: 48px;
    opacity: 0; pointer-events: none;
    transition: opacity 0.2s ease;
  }
  .lightbox.is-open{ opacity: 1; pointer-events: auto; }
  .lightbox img{
    max-width: 100%; max-height: 100%;
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0,0,0,0.45);
  }
  .lightbox-close{
    position: absolute; top: 20px; right: 24px;
    width: 38px; height: 38px; border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.35);
    background: rgba(255,255,255,0.08);
    color: #fff; font-size: 20px; line-height: 1;
    display:flex; align-items:center; justify-content:center;
    cursor: pointer;
  }
  .lightbox-close:hover{ background: rgba(255,255,255,0.2); }
  .lightbox-btn{
    position: absolute; top: 50%; transform: translateY(-50%);
    width: 42px; height: 42px; border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.35);
    background: rgba(255,255,255,0.08);
    color: #fff; font-family: var(--mono); font-size: 20px; line-height: 1;
    display:flex; align-items:center; justify-content:center;
    cursor: pointer;
  }
  .lightbox-btn:hover{ background: rgba(255,255,255,0.2); }
  .lightbox-btn.prev{ left: 16px; }
  .lightbox-btn.next{ right: 16px; }

  .sheet-body{ padding: 26px 28px 28px; }
  .sheet-top{
    display:flex; justify-content: space-between; align-items:flex-start; gap: 16px;
    margin-bottom: 6px;
  }
  .sheet-top h3{ font-size: 19px; }
  .status{
    font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
    padding: 4px 9px; border-radius: 999px; white-space: nowrap;
    border: 1px solid var(--line);
  }
  .status.active{ color: var(--copper-bright); border-color: var(--copper); }
  .status.planning{ color: var(--muted); }
  .status.research{ color: var(--silk-dim); }

  .tags{ display:flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
  .org-tag{
    display:inline-flex; align-items:center; gap: 6px;
    font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.04em;
    padding: 3px 10px 3px 3px; border-radius: 999px;
    border: 1px solid var(--line); color: var(--silk-dim);
  }
  .org-tag img{
    width: 18px; height: 18px;
    object-fit: contain;
    border-radius: 50%;
    background: var(--panel);
  }

  .sheet p.desc{ color: var(--silk-dim); font-size: 14.5px; margin: 12px 0 18px; max-width: 68ch; }
  .sheet-body .bullet-list{ margin: 12px 0 18px; padding-left: 20px; max-width: 68ch; }
  .sheet-body .bullet-list li{ color: var(--silk-dim); font-size: 14.5px; margin-bottom: 4px; }

  .specs{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 10px 20px;
    border-top: 1px solid var(--line-faint);
    padding-top: 16px;
  }
  .spec{ font-family: var(--mono); font-size: 12px; }
  .spec .k{ color: var(--muted); display:block; font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 3px; }
  .spec .v{ color: var(--silk); }

  .sheet-links{ margin-top: 18px; display:flex; gap: 18px; font-family: var(--mono); font-size: 12px; }

  /* ============================================================
     ABOUT
     ============================================================ */
  .about-grid{ display:grid; grid-template-columns: 1fr; gap: 32px; }
  .about-grid p{ color: var(--silk-dim); font-size: 15px; margin-bottom: 14px; max-width: 58ch; }
  .about-top{ display:grid; grid-template-columns: 1fr 260px; gap: 32px; align-items: start; }
  @media (max-width: 720px){
    .about-top{ grid-template-columns: 1fr; }
  }
  .about-photo{
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    display: block;
  }

  .skill-list{ list-style:none; }
  .skill-list li{
    display:flex; justify-content: space-between; gap: 12px;
    font-family: var(--mono); font-size: 12.5px;
    padding: 9px 0; border-bottom: 1px solid var(--line-faint);
    color: var(--silk-dim);
  }
  .skill-list li span:first-child{ color: var(--silk); }
  .skill-list li:last-child{ border-bottom: none; }

  /* ============================================================
     RESUME
     ============================================================ */
  .timeline-columns{
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 48px;
  }
  @media (max-width: 720px){
    .timeline-columns{ grid-template-columns: 1fr; }
  }

  .resume-download{
    display:flex; align-items:center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-top: 36px;
    background: linear-gradient(180deg, var(--panel), var(--panel-2));
  }
  .resume-download .fname{ font-family: var(--mono); font-size: 13px; color: var(--silk-dim); }
  .resume-download .dl-btn{
    font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase;
    border: 1px solid var(--copper); color: var(--copper-bright);
    padding: 8px 16px; border-radius: var(--radius);
  }
  .resume-download .dl-btn:hover{ background: var(--line); text-decoration: none; }

  .pdf-preview{
    margin-top: 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--panel);
  }
  .pdf-preview iframe{
    display: block;
    width: 100%;
    height: 1000px;
    border: none;
  }
  @media (max-width: 640px){
    .pdf-preview iframe{ height: 600px; }
  }

  .timeline{ list-style:none; }
  .timeline > li{
    padding: 20px 0; border-bottom: 1px solid var(--line-faint);
  }
  .timeline > li:last-child{ border-bottom: none; }
  .timeline .when{ font-family: var(--resume-font); font-size: 12.5px; color: var(--muted); letter-spacing: 0.02em; }
  .timeline .role-row{ display:flex; flex-direction: column; align-items:center; gap: 8px; margin-bottom: 8px; }
  .timeline .logo{
    width: 240px; height: 240px; flex-shrink: 0;
    object-fit: contain;
  }
  .timeline .what{ text-align: center; }
  .timeline .what h4{ font-family: var(--resume-font); font-size: 20px; color: var(--silk); font-weight: 600; }
  .timeline .what .org{ font-family: var(--resume-font); font-size: 18px; font-weight: 600; color: #000000; margin-bottom: 2px; }
  .timeline .what .org i{ font-weight: 400; font-style: italic; }
  .timeline .what .location{ font-family: var(--resume-font); font-size: 16px; color: var(--muted); margin-bottom: 6px; }
  .timeline .what p{ font-family: var(--resume-font); font-size: 14.5px; color: var(--silk-dim); max-width: 62ch; margin-left: auto; margin-right: auto; }
  .timeline .what .bullet-list{
    text-align: left;
    max-width: 62ch;
    margin: 0 auto;
    padding-left: 20px;
  }
  .timeline .what .bullet-list li{
    font-family: var(--resume-font); font-size: 14.5px; color: var(--silk-dim);
    margin-bottom: 4px;
  }

  .resume-subhead{
    font-family: var(--mono); font-size: 24px; letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--copper); margin: 44px 0 8px;
  }
  .resume-subhead:first-of-type{ margin-top: 0; }

  /* ============================================================
     CONTACT / FOOTER
     ============================================================ */
  footer{ padding: 56px 0 64px; }
  footer .contact-row{
    display:flex; flex-wrap: wrap; gap: 28px; align-items: baseline;
    margin-bottom: 40px;
  }
  footer .contact-row a{ font-family: var(--mono); font-size: 14px; }
  footer .fine{ font-family: var(--mono); font-size: 11px; color: var(--muted); }

  /* ============================================================
     ACTIVE NAV STATE
     ============================================================ */
  .nav-links a.active{ color: var(--copper-bright); }