:root {
    /* black & white */
    --bg: #FFFFFF;
    --bg-2: #F4F4F4;
    --card: #FAFAFA;
    --ink: #0A0A0A;
    --ink-2: #565656;
    --muted: #8C8C8C;
    --line: #E6E6E6;
    --panel: #0B0B0B;         /* flagship poster — fixed dark */
    --panel-ink: #FFFFFF;
    --panel-line: rgba(255,255,255,0.14);
    --shadow: 0 30px 70px -34px rgba(0,0,0,0.28);
    --shadow-sm: 0 16px 40px -20px rgba(0,0,0,0.24);

    --display: "Helvetica Neue", Helvetica, Arial, "Liberation Sans", sans-serif;
    --sans: "Helvetica Neue", Helvetica, Arial, "Liberation Sans", sans-serif;
    --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  }
  @media (prefers-color-scheme: dark) {
    :root {
      --bg: #0A0A0A; --bg-2: #151515; --card: #141414;
      --ink: #F4F4F4; --ink-2: #B2B2B2; --muted: #767676; --line: #262626;
      --panel: #1B1B1B; --panel-ink: #F4F4F4; --panel-line: rgba(255,255,255,0.16);
      --shadow: 0 30px 70px -34px rgba(0,0,0,0.7);
      --shadow-sm: 0 16px 40px -20px rgba(0,0,0,0.6);
    }
  }
  :root[data-theme="light"] {
    --bg: #FFFFFF; --bg-2: #F4F4F4; --card: #FAFAFA;
    --ink: #0A0A0A; --ink-2: #565656; --muted: #8C8C8C; --line: #E6E6E6;
    --panel: #0B0B0B; --panel-ink: #FFFFFF; --panel-line: rgba(255,255,255,0.14);
    --shadow: 0 30px 70px -34px rgba(0,0,0,0.28);
    --shadow-sm: 0 16px 40px -20px rgba(0,0,0,0.24);
  }
  :root[data-theme="dark"] {
    --bg: #0A0A0A; --bg-2: #151515; --card: #141414;
    --ink: #F4F4F4; --ink-2: #B2B2B2; --muted: #767676; --line: #262626;
    --panel: #1B1B1B; --panel-ink: #F4F4F4; --panel-line: rgba(255,255,255,0.16);
    --shadow: 0 30px 70px -34px rgba(0,0,0,0.7);
    --shadow-sm: 0 16px 40px -20px rgba(0,0,0,0.6);
  }

  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  }
  body {
    margin: 0; background: var(--bg); color: var(--ink);
    font-family: var(--sans); line-height: 1.5; -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }
  .wrap { width: min(1180px, 92vw); margin-inline: auto; }
  a { color: inherit; text-decoration: none; }
  :focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 3px; }

  /* mono utility label */
  .eyebrow, .mono { font-family: var(--mono); }
  .eyebrow {
    font-size: 0.7rem; letter-spacing: 0.05em; text-transform: uppercase;
    color: var(--ink-2); margin: 0;
  }

  /* ---------- top bar ---------- */
  header.bar {
    position: sticky; top: 0; z-index: 40;
    background: color-mix(in oklab, var(--bg) 84%, transparent);
    backdrop-filter: saturate(1.1) blur(14px);
    border-bottom: 1px solid var(--line);
  }
  .bar .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
  .brandmark { display: flex; align-items: center; gap: 11px; }
  .avatar {
    width: 30px; height: 30px; border-radius: 50%; flex: none;
    object-fit: cover; display: block;
    background: var(--bg-2);
    border: 1px solid var(--line);
  }
  .brandmark b { font-family: var(--display); font-weight: 700; font-size: 1rem; letter-spacing: -0.01em; }
  /* stacked name + role; tight leading so both lines clear the 64px bar */
  .brand-text { display: flex; flex-direction: column; line-height: 1.2; }
  .brand-text i { font-family: var(--mono); font-style: normal; font-size: 0.66rem; color: var(--muted); letter-spacing: 0.01em; }
  nav.links { display: flex; gap: 26px; align-items: center; }
  /* :not(.btn) so buttons keep their own colour — otherwise this rule outranks
     .btn-solid and the label goes grey-on-white (invisible in dark mode). */
  nav.links a:not(.btn) { font-family: var(--mono); font-size: 0.78rem; color: var(--ink-2); transition: color .2s; }
  nav.links a:not(.btn):hover { color: var(--ink); }
  .theme-btn {
    font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.04em;
    background: transparent; color: var(--ink-2);
    border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; cursor: pointer;
    transition: border-color .2s, color .2s;
  }
  .theme-btn:hover { color: var(--ink); border-color: var(--ink); }
  @media (max-width: 720px) { nav.links a { display: none; } }

  /* ---------- buttons ---------- */
  .btn {
    display: inline-flex; align-items: center; gap: 9px;
    font-family: var(--display); font-weight: 600; font-size: 0.95rem;
    padding: 12px 20px; border-radius: 999px; transition: transform .18s ease, background .2s, color .2s;
  }
  .btn-solid { background: var(--ink); color: var(--bg); border: 1px solid var(--ink); }
  .btn-solid:hover { transform: translateY(-2px); }
  .btn-ghost { border: 1px solid var(--line); color: var(--ink); }
  .btn-ghost:hover { border-color: var(--ink); }

  /* ---------- hero ---------- */
  .hero { padding: clamp(24px, 3.5vw, 40px) 0 clamp(40px, 6vw, 64px); position: relative; }
  .docbar {
    display: flex; flex-wrap: wrap; gap: 6px 26px; justify-content: space-between; align-items: center;
    font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.09em; text-transform: uppercase;
    color: var(--muted); padding: 13px 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--line);
    margin-bottom: clamp(30px, 5vw, 56px);
  }
  .docbar b { color: var(--ink); font-weight: 400; }
  .hero h1 {
    font-family: var(--display); font-weight: 700;
    font-size: clamp(1.85rem, 4vw, 3.1rem); line-height: 1.04; letter-spacing: -0.03em;
    margin: 0; max-width: 24ch; text-wrap: balance;
  }
  .hero .lede {
    font-family: var(--mono); font-size: clamp(0.95rem, 1.5vw, 1.08rem); line-height: 1.7;
    color: var(--ink-2); max-width: 52ch; margin: 26px 0 0;
  }
  .hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

  .stats {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
    margin-top: clamp(44px, 7vw, 80px); padding-top: 30px; border-top: 1px solid var(--line);
  }
  @media (max-width: 640px) { .stats { grid-template-columns: repeat(2, 1fr); gap: 26px 20px; } }
  .stats .k { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
  .stats .v { font-family: var(--display); font-weight: 700; font-size: clamp(1.02rem, 1.5vw, 1.3rem); letter-spacing: -0.01em; margin-top: 7px; }

  /* ---------- section scaffolding ---------- */
  section { padding: clamp(52px, 8vw, 96px) 0; }
  .section-head { margin-bottom: clamp(28px, 4vw, 44px); }
  .section-head h2 {
    font-family: var(--display); font-weight: 700; letter-spacing: -0.025em;
    font-size: clamp(1.35rem, 2.4vw, 1.9rem); margin: 12px 0 0; line-height: 1.08; text-wrap: balance;
  }

  /* ---------- app cards: Trustworthy + Camino ---------- */
  /* Shared two-column card: whole phone screenshot on the left, copy on the right.
     Stacks to one column on narrow screens. The screenshot is never cropped —
     the frame takes its height from the image's own aspect ratio. */
  .app {
    display: grid;
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 48px);
    align-items: center;
    margin-top: 20px;
    padding: clamp(26px, 4vw, 44px);
    border-radius: 28px;
    border: 1px solid var(--line);
    background: var(--bg-2);
    transition: transform .28s cubic-bezier(.2,.7,.3,1), box-shadow .28s, border-color .28s;
  }
  .app:hover { transform: translateY(-6px); box-shadow: var(--shadow-sm); border-color: var(--ink); }

  /* lead card (Trustworthy) — fixed dark panel; phone column inherited from .app
     so both cards render their screenshot at identical size */
  .app-lead {
    background: radial-gradient(120% 130% at 0% 0%, #1c2026 0%, #0b0b0c 68%);
    border-color: var(--panel-line);
    color: var(--panel-ink);
  }

  /* phone frame — bezel is padding, so the screenshot sits fully inside it */
  .app-shot {
    background: #0a0a0c;
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 40px;
    padding: 10px;
    box-shadow: 0 30px 70px -26px rgba(0,0,0,0.65);
    justify-self: center;
    width: 100%;
  }
  .app-shot img {
    display: block;
    width: 100%;
    height: auto;          /* full screenshot, no crop */
    border-radius: 31px;
  }

  .app-body { min-width: 0; }
  .app .pill {
    display: block; width: fit-content; margin-bottom: 16px;
    font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.08em; text-transform: uppercase;
    background: transparent; color: var(--ink-2); padding: 5px 10px;
    border: 1px solid var(--line); border-radius: 5px;
  }
  .app-lead .pill { color: rgba(255,255,255,0.72); border-color: rgba(255,255,255,0.28); }
  .app-name { font-family: var(--display); font-weight: 700; font-size: clamp(1.5rem, 3vw, 2.2rem); letter-spacing: -0.025em; display: inline-flex; align-items: center; gap: 10px; width: fit-content; }
  a.app-name span { transition: transform .22s cubic-bezier(.2,.7,.3,1); }
  a.app-name:hover span { transform: translateX(4px); }
  a.app-url { display: block; width: fit-content; }
  a.app-url:hover { color: var(--ink); }
  .app-lead a.app-url:hover { color: #fff; }
  .app-plat { font-family: var(--mono); font-size: 0.74rem; color: var(--ink-2); margin-top: 12px; letter-spacing: 0.02em; }
  .app-url { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); margin-top: 4px; }
  .app-desc { font-family: var(--mono); font-size: 0.84rem; line-height: 1.65; color: var(--ink-2); margin-top: 18px; max-width: 60ch; }
  .app-lead .app-plat { color: rgba(255,255,255,0.6); }
  .app-lead .app-url { color: rgba(255,255,255,0.42); }
  .app-lead .app-desc { color: rgba(255,255,255,0.82); }

  /* award laurels — SVGs are ~2:1, sized by height so both sit on one baseline */
  .app-awards { display: flex; flex-wrap: wrap; align-items: center; gap: clamp(16px, 3vw, 28px); margin-top: 26px; }
  .app-awards img { height: 78px; width: auto; display: block; }

  /* stacked: phone on top, capped so it never dominates the viewport */
  @media (max-width: 760px) {
    .app, .app-lead {
      grid-template-columns: 1fr;
      gap: 28px;
      justify-items: center;
      text-align: left;
    }
    .app-shot { width: min(100%, 260px); }
    .app-body { width: 100%; }
  }
  /* ---------- open-source project banner ---------- */
  .oss { display: block; margin-top: 20px; background: var(--bg-2); border: 1px solid var(--line); border-radius: 26px; overflow: hidden; transition: border-color .28s, transform .28s, box-shadow .28s; }
  .oss:hover { border-color: var(--ink); transform: translateY(-4px); box-shadow: var(--shadow-sm); }
  .oss-banner { position: relative; background: #000; line-height: 0; border-bottom: 1px solid var(--line); }
  .oss-banner video { width: 100%; height: auto; display: block; }
  .oss-banner .tag { position: absolute; top: 16px; left: 16px; z-index: 2; font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.08em; text-transform: uppercase; color: #fff; background: rgba(0,0,0,0.55); border: 1px solid rgba(255,255,255,0.28); padding: 5px 11px; border-radius: 6px; -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); }
  .oss-body { padding: 26px 30px 30px; }
  .oss-name { font-family: var(--display); font-weight: 700; font-size: clamp(1.4rem, 2.6vw, 1.9rem); letter-spacing: -0.02em; display: inline-flex; align-items: center; gap: 9px; }
  .oss-tagline { font-family: var(--mono); font-size: 0.8rem; color: var(--ink-2); margin-top: 8px; }
  .oss-tagline code { background: color-mix(in oklab, var(--ink) 10%, transparent); padding: 1px 5px; border-radius: 4px; font-size: 0.94em; }
  .oss-desc { font-family: var(--mono); font-size: 0.84rem; line-height: 1.65; color: var(--ink-2); margin-top: 14px; max-width: 74ch; }
  .oss-meta { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); margin-top: 16px; }

  /* ---------- phone mockup (grayscale in B&W) ---------- */
  .phone { width: 178px; height: 280px; border-radius: 30px; background: #0a0806; padding: 7px 7px 0;
    transform: translateY(16px); box-shadow: 0 18px 40px -22px rgba(0,0,0,0.5); }
  .screen { position: relative; width: 100%; height: 100%; border-radius: 24px 24px 0 0; overflow: hidden;
    background: var(--sbg, #14110d); color: #f3eee4; font-family: var(--sans); display: flex; flex-direction: column;
    filter: grayscale(1) contrast(1.02); }
  .island { position: absolute; top: 8px; left: 50%; transform: translateX(-50%); width: 58px; height: 17px; background: #000; border-radius: 999px; z-index: 6; }
  .statusbar { display: flex; justify-content: space-between; align-items: center; padding: 11px 16px 0; font-size: 0.6rem; font-weight: 600; opacity: 0.9; }
  .statusbar .dots { display: flex; gap: 3px; } .statusbar .dots i { width: 4px; height: 4px; border-radius: 50%; background: currentColor; display: inline-block; }
  .screen-body { flex: 1; padding: 13px 15px; display: flex; flex-direction: column; min-height: 0; }
  .s-title { font-family: var(--display); font-weight: 700; letter-spacing: -0.01em; }
  .row { display: flex; align-items: center; justify-content: space-between; }
  .bar-track { height: 5px; border-radius: 5px; background: rgba(255,255,255,0.14); overflow: hidden; }
  .bar-fill { height: 100%; border-radius: 5px; background: #fff; }
  .card-row { display: flex; align-items: center; gap: 8px; padding: 8px 9px; border-radius: 10px; background: rgba(255,255,255,0.08); font-size: 0.6rem; }
  .dot { width: 22px; height: 22px; border-radius: 7px; flex: none; }
  .wave { display: flex; align-items: flex-end; gap: 3px; height: 30px; }
  .wave i { width: 3px; background: #fff; border-radius: 2px; display: inline-block; }

  /* ---------- experience (résumé timeline) ---------- */
  .xp-row { display: grid; grid-template-columns: 190px 1fr; gap: 32px; padding: 34px 0; border-top: 1px solid var(--line); }
  .xp-row:last-child { border-bottom: 1px solid var(--line); }
  @media (max-width: 720px) { .xp-row { grid-template-columns: 1fr; gap: 12px; } }
  .xp-when { font-family: var(--mono); font-size: 0.82rem; color: var(--muted); letter-spacing: 0.02em; padding-top: 8px; }
  .xp-co { font-family: var(--display); font-weight: 700; font-size: clamp(1.25rem, 2.2vw, 1.65rem); letter-spacing: -0.02em; display: inline-flex; align-items: center; gap: 9px; }
  .xp-role { font-family: var(--display); font-weight: 500; font-size: 1.05rem; margin-top: 10px; color: var(--ink); }
  .xp-plat { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.02em; color: var(--ink-2); margin-top: 8px; }
  .xp-url { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); margin-top: 3px; }
  .xp-desc { font-family: var(--mono); font-size: 0.83rem; line-height: 1.7; color: var(--ink-2); margin-top: 16px; max-width: 68ch; }

  /* ---------- toolkit cards ---------- */
  .cards { display: grid; gap: 20px; margin-top: 22px; }
  .cards.four { grid-template-columns: repeat(4, 1fr); }
  .cards.two { grid-template-columns: repeat(2, 1fr); }
  @media (max-width: 900px) { .cards.four { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 560px) { .cards.four, .cards.two { grid-template-columns: 1fr; } }
  .card {
    background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 22px;
    display: flex; flex-direction: column; gap: 9px;
    transition: transform .28s cubic-bezier(.2,.7,.3,1), border-color .28s;
  }
  .card:hover { transform: translateY(-4px); border-color: var(--ink); }
  .card .lbl { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
  .card .items { font-family: var(--mono); font-size: 0.84rem; line-height: 1.55; color: var(--ink); }
  .card .school { font-family: var(--display); font-weight: 700; font-size: 1.1rem; letter-spacing: -0.01em; }
  .card .yr { font-family: var(--mono); font-size: 0.7rem; color: var(--muted); white-space: nowrap; }
  .card .deg { font-family: var(--mono); font-size: 0.8rem; color: var(--ink-2); line-height: 1.5; }
  .row2 { display: flex; justify-content: space-between; gap: 14px; align-items: baseline; }

  /* ---------- about ---------- */
  .about { border-top: 1px solid var(--line); }
  .about h2 { font-family: var(--display); font-weight: 700; font-size: clamp(1.5rem, 2.8vw, 2.1rem); letter-spacing: -0.025em; margin: 12px 0 0; max-width: 22ch; text-wrap: balance; line-height: 1.08; }
  .about p { font-family: var(--mono); font-size: clamp(0.92rem, 1.4vw, 1.05rem); line-height: 1.75; color: var(--ink-2); max-width: 62ch; margin: 22px 0 0; }

  /* ---------- contact ---------- */
  .cta { text-align: center; border-top: 1px solid var(--line); }
  .cta h2 { font-family: var(--display); font-weight: 700; font-size: clamp(1.7rem, 3.6vw, 2.6rem); letter-spacing: -0.03em; margin: 0 auto; max-width: 18ch; line-height: 1.04; text-wrap: balance; }
  .cta p { font-family: var(--mono); font-size: 0.95rem; line-height: 1.7; color: var(--ink-2); max-width: 44ch; margin: 20px auto 0; }

  footer { border-top: 1px solid var(--line); padding: 36px 0 56px; }
  footer .wrap { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; align-items: center; }
  footer .fnav { display: flex; gap: 22px; flex-wrap: wrap; }
  footer a { font-family: var(--mono); font-size: 0.78rem; color: var(--muted); }
  footer a:hover { color: var(--ink); }
  footer .meta { font-family: var(--mono); font-size: 0.74rem; color: var(--muted); }

  .reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.3,1); }
  .reveal.in { opacity: 1; transform: none; }