/* =============================================================
   Kevin Roualec — Design system "Living Machine"
   Dark-first AI aesthetic with glassmorphism, electric cyan.
   No external dependency. RGPD-friendly. WCAG 2.1 AA.
   ============================================================= */

/* ---------- Tokens ---------- */
:root {
  /* HAL dark palette (default) — deep space, red accent on amber accents kept cyan */
  --bg-deep: #02040a;
  --bg-elev: #08111e;
  --bg-card: rgba(10, 18, 36, 0.55);
  --bg-card-hover: rgba(14, 24, 44, 0.72);
  --bg-nav: rgba(4, 8, 18, 0.78);

  --border: rgba(120, 180, 255, 0.14);
  --border-strong: rgba(120, 180, 255, 0.32);

  --text: #e8edf5;
  --text-muted: #a3b0c5;
  --text-soft: #7d8aa1;

  --accent: #5dd4f7;
  --accent-deep: #2189c4;
  --accent-glow: rgba(93, 212, 247, 0.30);
  --accent-soft: rgba(93, 212, 247, 0.10);

  --secondary: #ffb37c;
  --secondary-soft: rgba(255, 130, 60, 0.10);

  --hal-red: #ff2a1a;
  --hal-amber: #ffb070;

  --focus: #ffd24a;

  --shadow: 0 1px 2px rgba(0,0,0,.5), 0 8px 32px -8px rgba(0,0,0,.55);
  --shadow-glow: 0 0 28px -6px var(--accent-glow), 0 8px 32px -10px rgba(0,0,0,.6);

  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 22px;
  --maxw: 1100px;
  --gutter: clamp(1rem, 4vw, 2rem);

  --tween: 200ms cubic-bezier(.2, .8, .2, 1);
  color-scheme: dark light;
}

/* Light tokens — applied either via prefers-color-scheme (auto) or [data-theme="light"] (forced) */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg-deep: #f5f7fb;
    --bg-elev: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.74);
    --bg-card-hover: rgba(255, 255, 255, 0.92);
    --bg-nav: rgba(255, 255, 255, 0.82);

    --border: rgba(40, 90, 170, 0.14);
    --border-strong: rgba(40, 90, 170, 0.34);

    --text: #0a1422;
    --text-muted: #45546e;
    --text-soft: #6c7a92;

    --accent: #0a66c2;
    --accent-deep: #054b8c;
    --accent-glow: rgba(10, 102, 194, 0.18);
    --accent-soft: rgba(10, 102, 194, 0.08);

    --secondary: #c64a1f;
    --secondary-soft: rgba(198, 74, 31, 0.08);

    --hal-red: #d62410;
    --hal-amber: #ff7a3a;

    --shadow: 0 1px 2px rgba(20,30,60,.06), 0 8px 28px -8px rgba(20,30,60,.10);
    --shadow-glow: 0 0 28px -8px var(--accent-glow), 0 8px 28px -10px rgba(20,30,60,.14);
  }
}

/* Forced light (overrides system preference) */
:root[data-theme="light"] {
  --bg-deep: #f5f7fb;
  --bg-elev: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.74);
  --bg-card-hover: rgba(255, 255, 255, 0.92);
  --bg-nav: rgba(255, 255, 255, 0.82);

  --border: rgba(40, 90, 170, 0.14);
  --border-strong: rgba(40, 90, 170, 0.34);

  --text: #0a1422;
  --text-muted: #45546e;
  --text-soft: #6c7a92;

  --accent: #0a66c2;
  --accent-deep: #054b8c;
  --accent-glow: rgba(10, 102, 194, 0.18);
  --accent-soft: rgba(10, 102, 194, 0.08);

  --secondary: #c64a1f;
  --secondary-soft: rgba(198, 74, 31, 0.08);

  --hal-red: #d62410;
  --hal-amber: #ff7a3a;

  --shadow: 0 1px 2px rgba(20,30,60,.06), 0 8px 28px -8px rgba(20,30,60,.10);
  --shadow-glow: 0 0 28px -8px var(--accent-glow), 0 8px 28px -10px rgba(20,30,60,.14);

  color-scheme: light;
}

/* Forced dark (overrides system preference) — keeps default tokens, no override needed */
:root[data-theme="dark"] { color-scheme: dark; }

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; 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;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, "Noto Sans", sans-serif;
  font-size: clamp(1rem, .96rem + .15vw, 1.0625rem);
  line-height: 1.6;
  color: var(--text);
  background: var(--bg-deep);
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; height: auto; display: block; }

a {
  color: var(--accent);
  text-decoration-thickness: .08em;
  text-underline-offset: .15em;
  transition: color var(--tween);
}
a:hover { color: var(--accent-deep); text-decoration-thickness: .15em; }
@media (prefers-color-scheme: dark) { a:hover { color: #a4ecff; } }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}
::selection { background: var(--accent); color: var(--bg-deep); }

/* ---------- HAL background (the eye watches) ---------- */
.neural-bg {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100dvh;
  z-index: -2;
  pointer-events: none;
  display: block;
}
.neural-overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  /* CRT scanlines + vignette to bring the eye forward */
  background:
    repeating-linear-gradient(0deg, rgba(0,0,0,0.10) 0 1px, transparent 1px 3px),
    radial-gradient(ellipse at center, transparent 25%, rgba(0,0,0,0.55) 90%);
  mix-blend-mode: multiply;
}
:root[data-theme="light"] .neural-overlay,
:root:not([data-theme]) .neural-overlay {
  /* default + light : softer overlay so it doesn't darken the page */
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .neural-overlay {
    background:
      repeating-linear-gradient(0deg, rgba(0,0,0,0.04) 0 1px, transparent 1px 3px),
      radial-gradient(ellipse at center, transparent 35%, rgba(0,0,0,0.10) 95%);
  }
}
:root[data-theme="light"] .neural-overlay {
  background:
    repeating-linear-gradient(0deg, rgba(0,0,0,0.04) 0 1px, transparent 1px 3px),
    radial-gradient(ellipse at center, transparent 35%, rgba(0,0,0,0.10) 95%);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  background: var(--accent);
  color: var(--bg-deep);
  padding: .75rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  z-index: 100;
  transition: top .15s;
  text-decoration: none;
}
.skip-link:focus { top: 1rem; color: var(--bg-deep); }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  background: var(--bg-nav);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border);
  z-index: 20;
}
.header-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas: "brand actions" "nav nav";
  gap: .35rem .75rem;
  padding-block: .55rem;
  align-items: center;
}
@media (min-width: 860px) {
  .header-grid {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "brand nav actions";
    gap: 1rem;
  }
}
.brand { grid-area: brand; }
.site-nav { grid-area: nav; min-width: 0; }
.header-actions { grid-area: actions; justify-self: end; display: inline-flex; align-items: center; gap: .35rem; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.0625rem;
  flex-shrink: 0;
}

/* Language switch — small button next to theme toggle */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .45rem .75rem;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: .8125rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  min-height: 40px;
  transition: color var(--tween), background-color var(--tween), border-color var(--tween), box-shadow var(--tween);
}
.lang-switch svg { width: 16px; height: 16px; }
.lang-switch:hover, .lang-switch:focus-visible {
  color: var(--accent);
  border-color: var(--border-strong);
  background: var(--accent-soft);
  text-decoration: none;
  outline: none;
}

/* Theme toggle (segmented control) */
.theme-toggle {
  display: inline-flex;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.theme-toggle button {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--text-muted);
  cursor: pointer;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  transition: background-color var(--tween), color var(--tween), box-shadow var(--tween);
}
.theme-toggle button svg { width: 16px; height: 16px; }
.theme-toggle button:hover { color: var(--text); background: var(--accent-soft); }
.theme-toggle button[aria-pressed="true"] {
  color: var(--accent);
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px var(--border-strong), 0 0 12px -4px var(--accent-glow);
}
.theme-toggle button[aria-pressed="true"]:hover { color: var(--accent); }
.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(140deg, var(--accent), var(--accent-deep));
  color: #04070f;
  font-weight: 800;
  font-size: .9375rem;
  letter-spacing: .02em;
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: -50%;
  background: conic-gradient(from 180deg, transparent 0deg, rgba(255,255,255,.4) 60deg, transparent 120deg);
  animation: brandSpin 8s linear infinite;
  opacity: .4;
}
@keyframes brandSpin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .brand-mark::after { animation: none; } }
.brand:hover .brand-mark { box-shadow: 0 0 32px -4px var(--accent-glow); }

.site-nav {
  margin-left: auto;
  min-width: 0;
}
.site-nav ul {
  display: flex;
  flex-wrap: nowrap;
  gap: .15rem;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: thin;
  -ms-overflow-style: none;
}
.site-nav ul::-webkit-scrollbar { height: 0; }
.site-nav a {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem .8rem;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: .9375rem;
  white-space: nowrap;
  transition: background-color var(--tween), color var(--tween);
}
.site-nav a svg { width: 16px; height: 16px; flex-shrink: 0; opacity: .8; }
.site-nav a:hover, .site-nav a:focus-visible { background: var(--accent-soft); color: var(--text); }
.site-nav a[aria-current="page"] {
  background: linear-gradient(135deg, var(--accent-soft), var(--secondary-soft));
  color: var(--accent);
  font-weight: 600;
  box-shadow: inset 0 0 0 1px var(--border);
}
.site-nav a[aria-current="page"] svg { opacity: 1; }

/* ---------- Hero (page Accueil) ---------- */
.hero {
  padding-block: clamp(2.5rem, 8vw, 5rem) clamp(2rem, 6vw, 3.5rem);
  position: relative;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .35rem .8rem;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid var(--border-strong);
  color: var(--accent);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .01em;
  margin-bottom: 1.25rem;
}
.hero-eyebrow .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
  animation: livingPulse 2.4s ease-in-out infinite;
}
@keyframes livingPulse {
  0%, 100% { opacity: .6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.3); }
}
@media (prefers-reduced-motion: reduce) { .hero-eyebrow .dot { animation: none; } }
.hero h1 {
  font-size: clamp(2rem, 5.5vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  margin: 0 0 1rem;
  background: linear-gradient(120deg, var(--text) 30%, var(--accent) 70%, var(--secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  max-width: 60ch;
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  color: var(--text-muted);
  font-size: .9375rem;
}
.hero-meta li { display: inline-flex; align-items: center; gap: .4rem; }
.hero-meta svg { width: 16px; height: 16px; opacity: .85; }
.hero-meta a { color: var(--text-muted); text-decoration: none; }
.hero-meta a:hover { color: var(--accent); }

.cta-row { display: flex; flex-wrap: wrap; gap: .65rem; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--tween), background-color var(--tween), border-color var(--tween), box-shadow var(--tween);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font-size: .9375rem;
  min-height: 44px;
}
.btn:hover { background: var(--bg-card-hover); transform: translateY(-1px); border-color: var(--accent); box-shadow: var(--shadow-glow); }
.btn svg { width: 18px; height: 18px; }
.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  border-color: transparent;
  color: #04070f;
  box-shadow: var(--shadow-glow);
}
.btn--primary:hover { color: #04070f; filter: brightness(1.08); }

/* ---------- Sections ---------- */
main { padding-block: clamp(2rem, 5vw, 3rem) clamp(3rem, 6vw, 5rem); position: relative; z-index: 1; }
section { margin-block: clamp(1.5rem, 4vw, 2.5rem); scroll-margin-top: 5rem; }
section:first-of-type { margin-top: 0; }

/* ---------- Utility classes (replace recurring inline styles) ---------- */
.svg-sprite { position: absolute; width: 0; height: 0; }
.icon-sm { width: 14px; height: 14px; }
.icon-inline { display: inline; vertical-align: -2px; margin-right: .35rem; }
.icon-ext { display: inline; vertical-align: -1px; margin-left: .25rem; opacity: .6; }
.h-page { font-size: clamp(1.75rem, 4vw, 2.5rem) !important; }
.h-sub { font-size: 1.35rem; margin-top: 2.5rem; }
.h-sub:first-of-type { margin-top: 2rem; }
.footer-heading { font-weight: 600; color: var(--text); }
.footer-links { list-style: none; padding: 0; margin: .25rem 0; display: grid; gap: .4rem; }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin: 0 0 .35rem;
  letter-spacing: -.015em;
  display: flex;
  align-items: center;
  gap: .75rem;
  line-height: 1.15;
}
.section-title .icon {
  width: 1.5em;
  height: 1.5em;
  padding: .35em;
  background: linear-gradient(135deg, var(--accent-soft), var(--secondary-soft));
  border: 1px solid var(--border-strong);
  color: var(--accent);
  border-radius: 12px;
  flex-shrink: 0;
  box-shadow: 0 0 16px -4px var(--accent-glow);
}
.section-lead {
  color: var(--text-muted);
  margin: 0 0 1.5rem;
  max-width: 70ch;
}

/* ---------- Cards / Items ---------- */
.card, .item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1rem, 3vw, 1.5rem);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  transition: border-color var(--tween), background-color var(--tween), transform var(--tween), box-shadow var(--tween);
  position: relative;
  overflow: hidden;
}
.card::before, .item::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 40%, var(--accent-soft) 60%, transparent 80%);
  opacity: 0;
  transition: opacity var(--tween);
  pointer-events: none;
}
.item:hover {
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.item:hover::before { opacity: 1; }

/* ---------- Horizontal interactive timeline rail ---------- */
/* Rendered automatically by neural.js for any .timeline.has-rail */
.hl-rail-wrap {
  margin: 0 0 1.5rem;
  padding: .9rem 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.hl-rail-wrap::before {
  /* horizontal track behind the dots */
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  top: 50%;
  margin-top: -1px;
  height: 2px;
  background: linear-gradient(90deg,
    transparent 0,
    color-mix(in srgb, var(--accent) 60%, transparent) 8%,
    color-mix(in srgb, var(--accent) 60%, transparent) 92%,
    transparent 100%);
  pointer-events: none;
}
.hl-rail {
  display: flex;
  gap: .25rem;
  padding: 0 1rem;
  overflow-x: auto;
  scrollbar-width: thin;
  scroll-behavior: smooth;
}
.hl-rail::-webkit-scrollbar { height: 6px; }
.hl-rail::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
.hl-rail::-webkit-scrollbar-track { background: transparent; }
.hl-node {
  appearance: none;
  background: transparent;
  border: 0;
  padding: .45rem .55rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .3rem;
  flex-shrink: 0;
  color: var(--text-muted);
  text-align: center;
  font-family: inherit;
  transition: color var(--tween), background-color var(--tween), transform var(--tween);
  position: relative;
  z-index: 1;
  min-width: 9ch;
  scroll-snap-align: center;
}
.hl-node:hover, .hl-node:focus-visible {
  color: var(--text);
  background: var(--accent-soft);
  outline: none;
}
.hl-node[aria-current="true"] {
  color: var(--accent);
  background: linear-gradient(135deg, var(--accent-soft), color-mix(in srgb, var(--accent) 6%, transparent));
}
.hl-year {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .04em;
  font-variant-numeric: tabular-nums;
}
.hl-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px var(--bg-card), 0 0 12px -2px var(--accent-glow);
  transition: transform .2s, background-color var(--tween), box-shadow var(--tween);
}
.hl-node:hover .hl-dot,
.hl-node:focus-visible .hl-dot,
.hl-node[aria-current="true"] .hl-dot {
  background: var(--accent);
  transform: scale(1.4);
  box-shadow: 0 0 0 4px var(--bg-card), 0 0 18px -2px var(--accent);
}
.hl-label {
  font-size: .75rem;
  white-space: nowrap;
  max-width: 16ch;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
}

/* Highlight the target card briefly when navigated from the rail */
.flash-highlight {
  animation: flashHighlight 1.4s ease-out;
}
@keyframes flashHighlight {
  0%   { box-shadow: 0 0 0 0 transparent; border-color: var(--border); }
  20%  { box-shadow: 0 0 36px -4px var(--accent), 0 0 0 2px var(--accent); border-color: var(--accent); }
  100% { box-shadow: var(--shadow); border-color: var(--border); }
}
@media (prefers-reduced-motion: reduce) {
  .flash-highlight { animation: none; outline: 2px solid var(--accent); }
}

/* ---------- Timeline (vertebral column) ---------- */
/* The vertical line runs through the centre of every .item-icon along the timeline.
   Icons "punch through" via a halo of bg-deep, so the spine looks broken only by
   each milestone. Adapts to theme via CSS variables. */
.timeline { display: grid; gap: 1rem; position: relative; }
.timeline::before {
  content: "";
  position: absolute;
  /* Item left padding (clamp) + half of the .item-icon width (38/2 = 19) */
  left: calc(clamp(1rem, 3vw, 1.5rem) + 19px);
  top: clamp(1rem, 3vw, 1.5rem);
  bottom: clamp(1rem, 3vw, 1.5rem);
  width: 2px;
  margin-left: -1px;
  background: linear-gradient(180deg,
    var(--accent) 0%,
    color-mix(in srgb, var(--accent) 60%, transparent) 50%,
    color-mix(in srgb, var(--accent) 25%, transparent) 100%);
  border-radius: 2px;
  z-index: 0;
  pointer-events: none;
}
.timeline > .item { position: relative; z-index: 1; }
.timeline > .item .item-icon {
  position: relative;
  z-index: 2;
  /* Halo cuts the line at each marker, then accent glow on top */
  box-shadow:
    0 0 0 5px var(--bg-deep),
    0 0 18px -4px var(--accent-glow);
}
/* Sub-items inherit a smaller dashed connector inside the parent card */
.sub-item { position: relative; padding-left: 1rem; }
.sub-item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: .65rem;
  bottom: .25rem;
  width: 2px;
  background: linear-gradient(180deg, var(--border-strong), var(--border));
  border-radius: 2px;
}
.sub-item:first-child::before { display: none; }

.item-head { display: flex; align-items: flex-start; gap: .85rem; position: relative; }
.item-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent-soft), var(--secondary-soft));
  border: 1px solid var(--border-strong);
  color: var(--accent);
  border-radius: 10px;
  box-shadow: 0 0 12px -4px var(--accent-glow);
}
.item-icon svg { width: 18px; height: 18px; }
.item-body { flex: 1 1 auto; min-width: 0; }
.item :is(h2, h3) { margin: 0 0 .25rem; font-size: 1.0625rem; line-height: 1.4; font-weight: 600; }
.item .org { margin: 0 0 .25rem; color: var(--text-muted); font-weight: 500; font-size: .9375rem; }
.item .meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1rem;
  margin: 0 0 .75rem;
  font-size: .875rem;
  color: var(--text-muted);
}
.item .meta-row span { display: inline-flex; align-items: center; gap: .35rem; }
.item .meta-row svg { width: 14px; height: 14px; flex-shrink: 0; opacity: .85; }
.item p { margin: .5rem 0; }
.item ul, .item ol { margin: .5rem 0 0; padding-left: 1.25rem; }
.item ul li, .item ol li { margin: .35rem 0; }
.sub-item {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
}
.sub-item:first-child { margin-top: 0; padding-top: 0; border-top: 0; }

/* ---------- Tags ---------- */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin: .75rem 0 0;
  padding: 0;
  list-style: none;
}
.tags li, .tag {
  font-size: .8125rem;
  padding: .25rem .65rem;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text);
  font-weight: 500;
}
.tags.tags--accent li {
  background: linear-gradient(135deg, var(--accent-soft), var(--secondary-soft));
  border-color: var(--border-strong);
}

/* ---------- Skill groups ---------- */
.skill-groups { display: grid; gap: 1rem; }
.skill-group h3 { margin: 0 0 .65rem; font-size: 1rem; display: inline-flex; align-items: center; gap: .5rem; }
.skill-group h3::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-glow);
}

/* ---------- Certification highlight + collapsible groups ---------- */
.cert-feature { margin-bottom: 1.25rem; }
.cert-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  margin-bottom: .65rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color var(--tween);
}
.cert-group:hover { border-color: var(--border-strong); }
.cert-group summary {
  cursor: pointer;
  list-style: none;
  padding: .85rem 1rem;
  display: flex;
  align-items: center;
  gap: .65rem;
  font-weight: 500;
  color: var(--text);
  user-select: none;
  min-height: 44px;
}
.cert-group summary::-webkit-details-marker { display: none; }
.cert-group summary::before {
  content: "›";
  display: inline-block;
  font-size: 1.4em;
  line-height: 1;
  color: var(--accent);
  transition: transform .2s;
  transform-origin: 50% 55%;
  flex-shrink: 0;
  width: 1ch;
}
.cert-group[open] summary::before { transform: rotate(90deg); }
.cert-group summary:hover, .cert-group summary:focus-visible {
  background: var(--accent-soft);
  outline: none;
}
.cert-group summary strong {
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}
.cert-group .cert-count {
  margin-left: auto;
  font-size: .75rem;
  font-weight: 600;
  padding: .15rem .55rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid var(--border-strong);
}
.cert-group .cert-list { padding: 0 1rem 1rem; margin: 0; }

/* ---------- Cert list ---------- */
.cert-list { list-style: none; padding: 0; margin: .25rem 0 0; display: grid; gap: .5rem; }
.cert-list li {
  padding: .65rem .85rem;
  background: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9375rem;
  line-height: 1.5;
  transition: border-color var(--tween);
}
.cert-list li:hover { border-color: var(--border-strong); }
.cert-list li strong { display: block; color: var(--text); }
.cert-list li time { color: var(--text-muted); font-size: .875rem; }

/* ---------- Languages ---------- */
.languages { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .75rem; }
.languages li {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .55rem .9rem;
  font-weight: 500;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* ---------- Contact / links ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: .75rem;
  margin-top: 1rem;
}
@media (min-width: 600px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
.contact-card {
  display: flex;
  align-items: center;
  gap: .85rem;
  padding: 1rem 1.15rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: transform var(--tween), border-color var(--tween), background-color var(--tween), box-shadow var(--tween);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  min-height: 44px;
}
.contact-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-glow);
}
.contact-card .ic {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-soft), var(--secondary-soft));
  border: 1px solid var(--border-strong);
  color: var(--accent);
  flex-shrink: 0;
}
.contact-card .ic svg { width: 20px; height: 20px; }
.contact-card .lbl { display: block; font-size: .75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.contact-card .val { display: block; font-weight: 600; }

/* ---------- Contact shield (anti-bot CAPTCHA) ---------- */
.contact-shield {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}
.shield-intro {
  display: flex;
  align-items: flex-start;
  gap: .55rem;
  margin: 0;
  color: var(--text);
}
.shield-intro svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}
.shield-challenge {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  align-items: flex-end;
}
.shield-challenge label {
  flex: 1 1 16ch;
  display: grid;
  gap: .35rem;
  font-weight: 500;
  color: var(--text);
}
.shield-challenge input[type="number"] {
  width: 100%;
  padding: .65rem .85rem;
  background: var(--bg-deep);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font: inherit;
  font-size: 1rem;
  min-height: 44px;
  -moz-appearance: textfield;
}
.shield-challenge input[type="number"]::-webkit-outer-spin-button,
.shield-challenge input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none; margin: 0;
}
.shield-challenge input:focus-visible {
  border-color: var(--accent);
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.shield-challenge .btn { flex-shrink: 0; }
.shield-error {
  margin: 0;
  padding: .55rem .85rem;
  background: color-mix(in srgb, #ff5050 14%, transparent);
  border: 1px solid color-mix(in srgb, #ff5050 35%, transparent);
  color: var(--text);
  border-radius: var(--radius-sm);
  font-size: .9375rem;
}
.shield-q {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  background: var(--accent-soft);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: .15rem .55rem;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--accent);
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 2rem;
  margin-top: 3rem;
  background: var(--bg-nav);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  color: var(--text-muted);
  font-size: .875rem;
  position: relative;
  z-index: 1;
}
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--accent); }
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 720px) { .footer-grid { grid-template-columns: 2fr 1fr; } }

details.legal { margin-top: .75rem; }
details.legal summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text);
  padding: .35rem 0;
  list-style: none;
}
details.legal summary::-webkit-details-marker { display: none; }
details.legal summary::before { content: "▸ "; transition: transform .15s; display: inline-block; }
details.legal[open] summary::before { transform: rotate(90deg); }
details.legal p { margin: .5rem 0; }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text);
  border-radius: 50%;
  box-shadow: var(--shadow);
  cursor: pointer;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .25s, transform .25s, background-color var(--tween);
  z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { background: var(--bg-card-hover); border-color: var(--accent); box-shadow: var(--shadow-glow); }
.to-top svg { width: 20px; height: 20px; }

/* ---------- Page-enter animation ---------- */
@media (prefers-reduced-motion: no-preference) {
  main { animation: pageIn .4s cubic-bezier(.2,.8,.2,1) both; }
  @keyframes pageIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
}

/* ---------- Print ---------- */
@media print {
  .neural-bg, .neural-overlay, .site-nav, .skip-link, .site-footer .legal, .to-top, .hero-eyebrow .dot { display: none !important; }
  body { background: #fff; color: #000; }
  :root {
    --bg-deep: #fff; --bg-card: #fff; --bg-card-hover: #fff; --bg-nav: #fff;
    --border: #ccc; --border-strong: #888; --text: #000; --text-muted: #333; --accent: #003a70;
    --shadow: none; --shadow-glow: none;
  }
  .site-header { padding-block: 1rem; border-bottom: 2px solid #000; }
  section { margin-block: 1rem; page-break-inside: avoid; }
  .item, .card { page-break-inside: avoid; box-shadow: none; backdrop-filter: none; }
  a { color: #000; text-decoration: none; }
  a[href^="http"]::after, a[href^="mailto:"]::after { content: " (" attr(href) ")"; font-size: .8em; color: #555; }
  .hero h1 { color: #000 !important; -webkit-background-clip: initial; background-clip: initial; background: none; }
}

/* ---------- Responsive fine-tune ---------- */
@media (max-width: 540px) {
  .header-grid { padding-block: .5rem; }
  .brand-text { display: none; }
  .site-nav a { padding: .5rem .65rem; font-size: .875rem; }
  .hero { padding-block: 2rem 1.5rem; }
}