:root {
    --bg: #0A0D18;
    --bg-soft: #0F1428;
    --surface: #141A2E;
    --ink: #F1F2F8;
    --ink-soft: #98A0C3;
    --accent: #6C5CE7;
    --accent-2: #22D3EE;
    --accent-warm: #E8BC6E;
    --border: #262C46;
    --font-serif: Fraunces, Georgia, 'Times New Roman', serif;
    --font-sans: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
    box-sizing: border-box;
    padding-top: env(safe-area-inset-top, 0px);
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }

  html { scroll-padding-top: env(safe-area-inset-top, 0px); }
  @media (prefers-reduced-motion: no-preference) {
    html { scroll-behavior: smooth; }
  }
  .reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.is-visible { opacity: 1; transform: translateY(0); }
  @media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    background:
      radial-gradient(ellipse 900px 500px at 15% -10%, color-mix(in srgb, var(--accent) 20%, transparent), transparent 60%),
      radial-gradient(ellipse 800px 600px at 100% 10%, color-mix(in srgb, var(--accent-2) 14%, transparent), transparent 55%),
      var(--bg);
    background-attachment: fixed;
    color: var(--ink);
    font-family: var(--font-sans);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; }
  img { max-width: 100%; }

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

  /* Floating nav */
  .floating-nav {
    position: fixed;
    top: 50%;
    right: 22px;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 20px;
    z-index: 20;
    padding-top: env(safe-area-inset-top, 0px);
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
  .floating-nav a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    color: var(--ink-soft);
    opacity: 0.55;
    text-decoration: none;
    transition: opacity 0.2s ease, color 0.2s ease;
  }
  .floating-nav a svg { width: 18px; height: 18px; }
  .floating-nav a:hover, .floating-nav a:focus-visible {
    opacity: 1;
    color: var(--accent);
  }
  .floating-nav a.is-active {
    opacity: 1;
    color: var(--accent-2);
    background: color-mix(in srgb, var(--accent-2) 14%, transparent);
    border-radius: 50%;
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent-2) 14%, transparent);
    animation: navActivate 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  }
  @keyframes navActivate {
    0% { transform: scale(0.6); box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent-2) 30%, transparent); }
    55% { transform: scale(1.22); }
    100% { transform: scale(1); box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent-2) 14%, transparent); }
  }
  @media (prefers-reduced-motion: reduce) {
    .floating-nav a.is-active { animation: none; }
  }
  @media (max-width: 700px) {
    .floating-nav {
      top: auto;
      bottom: 18px;
      right: 50%;
      transform: translateX(50%);
      flex-direction: row;
      gap: 26px;
      background: color-mix(in srgb, var(--bg) 80%, transparent);
      backdrop-filter: blur(6px);
      padding: 10px 18px;
      padding-bottom: calc(10px + env(safe-area-inset-bottom, 0px));
      border-radius: 999px;
    }
  }

  /* Hero */
  .hero {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 48px;
    align-items: center;
    padding: 72px 0 88px;
  }
  @media (max-width: 760px) {
    .hero { grid-template-columns: 1fr; padding: 48px 0 56px; }
  }
  .eyebrow {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--accent);
    margin: 0 0 18px;
  }
  h1 {
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: clamp(2.3rem, 5vw, 3.5rem);
    line-height: 1.1;
    margin: 0 0 18px;
    letter-spacing: -0.02em;
  }
  h1 .name-gradient {
    background: linear-gradient(100deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
  .role-line {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--accent-2);
    margin: 0 0 20px;
  }
  .hero p.lede {
    font-size: 1.05rem;
    color: var(--ink-soft);
    max-width: 48ch;
    margin: 0 auto 34px;
  }
  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
  }
  .hero-actions a {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 13px 22px;
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 500;
    text-decoration: none;
    transition: transform 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
  }
  .hero-actions a svg { width: 17px; height: 17px; flex-shrink: 0; }
  .btn-fill {
    background: linear-gradient(100deg, var(--accent), var(--accent-2));
    color: #0A0D18;
    border: none;
  }
  .btn-fill:hover, .btn-fill:focus-visible { transform: translateY(-1px); opacity: 0.92; }
  .btn-outline {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--border);
  }
  .btn-outline:hover, .btn-outline:focus-visible {
    border-color: var(--accent-2);
    color: var(--accent-2);
  }
  .links-row {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
  }
  .links-row a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border);
    color: var(--ink-soft);
    text-decoration: none;
    transition: color 0.15s ease, border-color 0.15s ease;
  }
  .links-row a:hover, .links-row a:focus-visible {
    color: var(--accent-2);
    border-color: var(--accent-2);
  }
  .links-row svg { width: 18px; height: 18px; flex-shrink: 0; }

  /* Education / experience */
  .credentials-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-top: 56px;
  }
  @media (max-width: 700px) {
    .credentials-grid { grid-template-columns: 1fr; gap: 40px; }
  }
  .credentials-col h3 {
    font-family: var(--font-serif);
    font-weight: 500;
    font-size: 1.15rem;
    margin: 0 0 20px;
  }
  .cred-list { display: flex; flex-direction: column; gap: 14px; }
  .cred-card {
    display: flex;
    gap: 14px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
  }
  .cred-icon {
    width: 38px;
    height: 38px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 0.72rem;
    color: #fff;
    flex-shrink: 0;
    overflow: hidden;
    background: #fff;
  }
  .cred-icon img { width: 100%; height: 100%; object-fit: cover; }
  .cred-icon--zoom-out { padding: 5px; }
  .cred-icon--zoom-out img { object-fit: contain; }
  .cred-icon svg { width: 20px; height: 20px; }
  .cred-body h4 {
    margin: 0 0 3px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.96rem;
  }
  .cred-body .cred-sub {
    font-size: 0.85rem;
    color: var(--ink-soft);
    margin: 0 0 4px;
  }
  .cred-body .cred-date {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    color: var(--accent);
  }
  .cred-body .cred-prev {
    font-size: 0.78rem;
    color: var(--ink-soft);
    margin: 6px 0 0;
    line-height: 1.5;
  }

  /* Scrollable, year-grouped experience */
  .exp-scroll {
    max-height: 460px;
    overflow-y: auto;
    padding-right: 10px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
  }
  .exp-scroll::-webkit-scrollbar { width: 6px; }
  .exp-scroll::-webkit-scrollbar-track { background: transparent; }
  .exp-scroll::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
  .exp-scroll::-webkit-scrollbar-thumb:hover { background: var(--accent); }
  .exp-year-group { margin-bottom: 22px; }
  .exp-year-group:last-child { margin-bottom: 4px; }
  .exp-year {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--accent-2);
    margin: 0 0 12px;
    position: sticky;
    top: 0;
    background: var(--bg);
    padding: 4px 0;
    z-index: 1;
  }

  .sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
  }

  /* Hero centered layout */
  .hero-centered {
    display: block;
    text-align: center;
    padding: 88px 0 96px;
  }
  @media (max-width: 760px) {
    .hero-centered { padding: 56px 0 64px; }
  }
  .hero-centered .lede { margin-left: auto; margin-right: auto; }
  .hero-centered .hero-actions { justify-content: center; }

  /* Sections */
  section { padding: 64px 0; border-top: 1px solid var(--border); }
  h2 {
    font-family: var(--font-serif);
    font-weight: 500;
    font-size: 1.7rem;
    margin: 0 0 26px;
  }
  .about-text {
    max-width: 62ch;
    font-size: 1.03rem;
    color: var(--ink-soft);
  }
  .about-text strong { color: var(--ink); font-weight: 500; }
  .about-text p { margin: 0 0 18px; }

  /* Projects */
  .project {
    padding: 32px 0;
    border-top: 1px solid var(--border);
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 32px;
  }
  .project:first-of-type { border-top: none; padding-top: 0; }
  @media (max-width: 700px) {
    .project { grid-template-columns: 1fr; gap: 12px; }
  }
  .project h3 {
    font-family: var(--font-serif);
    font-weight: 500;
    font-size: 1.32rem;
    margin: 0;
  }
  .project .tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--accent);
    margin-top: 8px;
  }
  .project-body p {
    margin: 0 0 14px;
    color: var(--ink-soft);
  }
  .project-body .stack {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--ink-soft);
    margin: 0 0 14px;
  }
  .project-body a {
    font-size: 0.92rem;
    text-decoration: none;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1px;
  }
  .project-body a:hover, .project-body a:focus-visible { border-color: var(--ink); }

  /* Contact / footer */
  footer {
    border-top: 1px solid var(--border);
    padding: 56px 0 40px;
  }
  footer h2 { margin-bottom: 14px; }
  footer p.note {
    color: var(--ink-soft);
    max-width: 50ch;
    margin: 0 0 26px;
  }
  .foot-bottom {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--ink-soft);
    font-family: var(--font-mono);
  }

  a:focus-visible, button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
  }

  /* About: photo + bio */
  .about-grid {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 40px;
    align-items: start;
    margin-bottom: 44px;
  }
  @media (max-width: 700px) {
    .about-grid { grid-template-columns: 1fr; }
  }
  .photo-frame {
    width: 100%;
    aspect-ratio: 4 / 5;
    border-radius: 8px;
    overflow: hidden;
    background: var(--surface);
  }
  .photo-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  /* Skills */
  .skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(68px, 1fr));
    gap: 18px 14px;
  }
  .skill {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }
  .skill-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 0.78rem;
    color: #fff;
    flex-shrink: 0;
  }
  .skill-icon svg { width: 28px; height: 28px; }
  .skill-name {
    font-size: 0.72rem;
    color: var(--ink-soft);
    text-align: center;
  }

  /* Projects carousel */
  .carousel {
    position: relative;
  }
  .carousel-track {
    display: flex;
    gap: 28px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 8px;
    scrollbar-width: none;
  }
  .carousel-track::-webkit-scrollbar { display: none; }
  .slide {
    flex: 0 0 100%;
    scroll-snap-align: start;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
  }
  @media (max-width: 760px) {
    .slide { grid-template-columns: 1fr; }
  }
  .doc-frame {
    width: 100%;
    aspect-ratio: 16 / 10;
    border: 1.5px dashed var(--border);
    border-radius: 6px;
    background: var(--surface);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--ink-soft);
    text-align: center;
  }
  .doc-frame svg { width: 28px; height: 28px; opacity: 0.55; }
  .doc-frame span { font-family: var(--font-mono); font-size: 0.78rem; }
  .doc-thumbs {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
  }
  .doc-thumbs::-webkit-scrollbar { height: 5px; }
  .doc-thumbs::-webkit-scrollbar-track { background: transparent; }
  .doc-thumbs::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
  .doc-thumb {
    flex: 0 0 84px;
    aspect-ratio: 16 / 10;
    border: 1px dashed var(--border);
    border-radius: 4px;
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--ink-soft);
    cursor: pointer;
    transition: border-color 0.15s ease, opacity 0.15s ease;
  }
  .doc-thumb:hover { border-color: var(--accent-2); opacity: 0.9; }
  .doc-thumb.is-active { border: 1.5px solid var(--accent-2); }
  @media (max-width: 700px) {
    .doc-thumb { flex-basis: 76px; }
  }
  .doc-frame img, .doc-thumb img {
    cursor: zoom-in;
    transition: opacity 0.15s ease;
  }
  .doc-frame img:hover, .doc-thumb img:hover { opacity: 0.85; }

  /* Lightbox */
  .lightbox {
    position: fixed;
    inset: 0;
    background: rgba(6, 8, 16, 0.9);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 32px;
    padding-top: calc(32px + env(safe-area-inset-top, 0px));
    padding-bottom: calc(32px + env(safe-area-inset-bottom, 0px));
    cursor: zoom-out;
  }
  .lightbox.is-open { display: flex; }
  .lightbox img {
    max-width: 100%;
    max-height: 100%;
    border-radius: 8px;
    box-shadow: 0 30px 70px -20px rgba(0,0,0,0.7);
  }
  .lightbox-close {
    position: fixed;
    top: calc(20px + env(safe-area-inset-top, 0px));
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--ink);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }
  .lightbox-close svg { width: 18px; height: 18px; }
  .carousel-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 26px;
  }
  .carousel-arrows { display: flex; gap: 10px; }
  .arrow-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--ink);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color 0.15s ease;
  }
  .arrow-btn:hover, .arrow-btn:focus-visible { border-color: var(--accent); }
  .arrow-btn svg { width: 16px; height: 16px; }
  .dots { display: flex; gap: 8px; }
  .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--border);
    border: none;
    padding: 0;
    cursor: pointer;
    transition: background 0.15s ease;
  }
  .dot[aria-current="true"] { background: var(--accent); }