/* ---------- Design tokens ---------- */
:root {
  --bg: #ffffff;
  --bg-soft: #fafafa;
  --bg-elev: #ffffff;
  --border: #ebebeb;
  --border-strong: #d4d4d4;
  --text: #0a0a0a;
  --text-2: #525252;
  --text-3: #8a8a8a;
  --accent: #059669;        /* emerald-600 */
  --accent-soft: #ecfdf5;   /* emerald-50 */
  --accent-ink: #064e3b;    /* emerald-900 */
  --shadow-sm: 0 1px 0 rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.03);
  --shadow-md: 0 4px 16px -4px rgba(0,0,0,0.08);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --maxw: 920px;
  --font-sans: "Geist", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --font-serif: "Source Serif 4", Georgia, serif;
}
:root[data-theme="dark"] {
  --bg: #0a0a0a;
  --bg-soft: #111111;
  --bg-elev: #141414;
  --border: #232323;
  --border-strong: #303030;
  --text: #fafafa;
  --text-2: #a3a3a3;
  --text-3: #6b6b6b;
  --accent: #34d399;
  --accent-soft: #052e1e;
  --accent-ink: #d1fae5;
  --shadow-sm: 0 1px 0 rgba(255,255,255,0.04);
  --shadow-md: 0 4px 24px -4px rgba(0,0,0,0.6);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 15px;
  line-height: 1.55;
  letter-spacing: -0.005em;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; }

/* ---------- Layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- Top nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(140%) blur(12px);
  background: color-mix(in oklab, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; gap: 28px;
  height: 60px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 600; letter-spacing: -0.02em;
}
.brand-mark {
  width: 26px; height: 26px; border-radius: 7px;
  background: var(--text); color: var(--bg);
  display: grid; place-items: center;
  font-family: var(--font-mono); font-size: 11px; font-weight: 700;
}
.nav-links { display: flex; gap: 22px; margin-left: 8px; }
.nav-links a {
  color: var(--text-2); font-size: 14px; transition: color .15s ease;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); }
.nav-tools { margin-left: auto; display: flex; align-items: center; gap: 6px; }

.icon-btn {
  height: 32px; min-width: 32px; padding: 0 8px;
  border: 1px solid var(--border); background: var(--bg-elev);
  border-radius: 8px; color: var(--text-2);
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font-size: 13px; transition: all .15s ease;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); }
.icon-btn svg { width: 15px; height: 15px; }
.icon-btn[data-active="true"] { color: var(--text); background: var(--bg-soft); }

/* ---------- Type ---------- */
h1, h2, h3, h4 { letter-spacing: -0.025em; line-height: 1.15; margin: 0; }
h1 { font-size: clamp(34px, 4vw, 44px); font-weight: 600; }
h2 { font-size: 22px; font-weight: 600; }
h3 { font-size: 16px; font-weight: 600; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-3);
}
.lede { color: var(--text-2); font-size: 17px; line-height: 1.55; max-width: 60ch; }

/* ---------- Sections ---------- */
section { padding: 56px 0; border-top: 1px solid var(--border); }
section:first-of-type { border-top: 0; }
.section-head {
  display: grid; grid-template-columns: 140px 1fr; gap: 36px;
  margin-bottom: 28px;
}
.section-head .eyebrow { padding-top: 4px; }
@media (max-width: 720px) {
  .section-head { grid-template-columns: 1fr; gap: 8px; }
}

/* ---------- Hero ---------- */
.hero { padding: 36px 0 56px; }
.hero h1 { margin-bottom: 18px; }
.hero h1 .accent { color: var(--accent); }
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 8px 18px;
  margin-top: 28px; color: var(--text-2); font-size: 14px;
}
.hero-meta .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); display: inline-block; margin-right: 8px; vertical-align: middle; }
.hero-actions { display: flex; gap: 10px; margin-top: 28px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 38px; padding: 0 14px; border-radius: 8px;
  font-size: 14px; font-weight: 500;
  transition: all .15s ease;
}
.btn-primary { background: var(--text); color: var(--bg); }
.btn-primary:hover { background: var(--accent); color: #fff; }
.btn-ghost { border: 1px solid var(--border); color: var(--text); background: var(--bg-elev); }
.btn-ghost:hover { border-color: var(--border-strong); }
.btn svg { width: 14px; height: 14px; }

/* ---------- Cards / grids ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 720px) { .grid-2 { grid-template-columns: 1fr; } }

.card {
  border: 1px solid var(--border); background: var(--bg-elev);
  border-radius: var(--radius); padding: 20px;
  transition: border-color .15s ease, transform .2s ease;
}
.card:hover { border-color: var(--border-strong); }
.card .meta { color: var(--text-3); font-size: 12px; font-family: var(--font-mono); }
.card h3 { margin: 10px 0 6px; }
.card p { color: var(--text-2); margin: 0; font-size: 14px; }
.card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.tag {
  font-family: var(--font-mono); font-size: 11px;
  padding: 3px 7px; border-radius: 5px;
  background: var(--bg-soft); color: var(--text-2);
  border: 1px solid var(--border);
}
.tag.accent { background: var(--accent-soft); color: var(--accent-ink); border-color: transparent; }

/* ---------- Experience timeline ---------- */
.timeline { display: flex; flex-direction: column; gap: 0; }
.exp {
  display: grid; grid-template-columns: 140px 1fr; gap: 36px;
  padding: 24px 0; border-top: 1px solid var(--border);
}
.exp:first-child { border-top: 0; padding-top: 0; }
.exp .when { color: var(--text-3); font-family: var(--font-mono); font-size: 12px; }
.exp h3 { font-size: 16px; }
.exp .where { color: var(--text-2); font-size: 14px; margin-top: 2px; }
.exp p { color: var(--text-2); margin: 10px 0 0; font-size: 14px; }
.exp ul { margin: 10px 0 0; padding-left: 18px; color: var(--text-2); font-size: 14px; }
.exp ul li { margin: 4px 0; }
.exp .tags { margin-top: 12px; }
@media (max-width: 720px) {
  .exp { grid-template-columns: 1fr; gap: 8px; }
}

/* ---------- Skills ---------- */
.skill-group { display: grid; grid-template-columns: 140px 1fr; gap: 36px; padding: 18px 0; border-top: 1px solid var(--border); }
.skill-group:first-child { border-top: 0; padding-top: 0; }
.skill-group h4 { font-size: 13px; font-weight: 600; color: var(--text); margin: 4px 0 0; }
.skill-list { display: flex; flex-wrap: wrap; gap: 6px; }
@media (max-width: 720px) {
  .skill-group { grid-template-columns: 1fr; gap: 10px; }
}

/* ---------- Footer ---------- */
footer { padding: 48px 0 64px; border-top: 1px solid var(--border); color: var(--text-3); font-size: 13px; }
.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.foot a { color: var(--text-2); }
.foot a:hover { color: var(--text); }

/* ---------- i18n helper ---------- */
[data-lang]:not([data-lang="fr"]) { display: none; }
:root[data-locale="en"] [data-lang="fr"] { display: none; }
:root[data-locale="en"] [data-lang="en"] { display: revert; }

/* ---------- Selection ---------- */
::selection { background: var(--accent); color: #fff; }