/* =========================================================================
   Notes — Cybersécurité & systèmes embarqués
   Habillage commun : accueil, index de rubriques, notes converties depuis .txt
   Les notes HTML importées gardent leur propre style : ce fichier ne les touche pas.
   ========================================================================= */

:root {
  --ink:       #12161c;
  --ink-soft:  #3a4450;
  --ink-mute:  #6b7685;
  --paper:     #f5f3ee;
  --paper-2:   #ece9e1;
  --paper-3:   #e2ded3;
  --line:      #d8d3c7;
  --screen:    #0e1319;
  --screen-2:  #161d26;
  --trace:     #e6b24a;
  --trace-ink: #8a6d1f;
  --danger:    #c0473b;
  --ok:        #4a8a6f;

  --font: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --wrap: 940px;
  --r: 4px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink:      #e7e3da;
    --ink-soft: #b3b9c2;
    --ink-mute: #838d99;
    --paper:    #0e1319;
    --paper-2:  #161d26;
    --paper-3:  #1d252f;
    --line:     #2a333e;
    --screen:   #080b0f;
    --screen-2: #111821;
    --trace-ink:#e6b24a;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
code, .mono { font-family: var(--mono); }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* ---------- Bandeau « écran » ---------- */
.hero {
  background: var(--screen);
  color: #e9e6df;
  border-bottom: 3px solid var(--trace);
  padding: 56px 24px 44px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(230,178,74,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(230,178,74,.06) 1px, transparent 1px);
  background-size: 34px 34px;
}
.hero-inner { max-width: var(--wrap); margin: 0 auto; position: relative; }

.kicker {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--trace);
  margin: 0 0 16px;
  text-transform: uppercase;
}
.kicker a { color: inherit; text-decoration: none; border-bottom: 1px solid rgba(230,178,74,.4); }
.kicker a:hover { border-bottom-color: var(--trace); }

.hero h1 {
  font-size: clamp(1.9rem, 5vw, 3.1rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 700;
  margin: 0 0 16px;
  max-width: 20ch;
}
.hero h1 .thin { color: var(--trace); font-weight: 600; }

.hero p {
  color: #b9b4a8;
  max-width: 62ch;
  margin: 0;
  font-size: 1.02rem;
}

/* ---------- Corps ---------- */
main { padding: 48px 0 72px; }

.eyebrow {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 20px;
}
.eyebrow::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.eyebrow .num { color: var(--trace-ink); }

h2 { font-size: 1.5rem; letter-spacing: -.01em; margin: 0 0 8px; }
h3 { font-size: 1.12rem; margin: 32px 0 8px; }

.lead { color: var(--ink-soft); max-width: 68ch; margin: 0 0 28px; }

/* ---------- Liste d'entrées ---------- */
.entries { list-style: none; margin: 0 0 40px; padding: 0; }

.entry {
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 2.4rem 1fr;
  gap: 4px 16px;
  padding: 16px 0;
  align-items: baseline;
}
.entry:last-child { border-bottom: 1px solid var(--line); }

.entry .idx {
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--ink-mute);
  padding-top: 3px;
}
.entry a {
  text-decoration: none;
  font-weight: 600;
  font-size: 1.02rem;
  border-bottom: 2px solid transparent;
  transition: border-color .12s, color .12s;
}
.entry a:hover { border-bottom-color: var(--trace); }
.entry .desc {
  grid-column: 2;
  color: var(--ink-soft);
  font-size: .93rem;
  margin: 2px 0 0;
  max-width: 70ch;
}
.entry .tags {
  grid-column: 2;
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--ink-mute);
  letter-spacing: .06em;
  margin-top: 6px;
}

.group-title {
  font-family: var(--mono);
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--trace-ink);
  margin: 36px 0 10px;
}

/* ---------- Cartes de rubrique (accueil) ---------- */
.sections { display: grid; gap: 2px; background: var(--line); border: 1px solid var(--line); margin-bottom: 40px; }
@media (min-width: 720px) { .sections { grid-template-columns: 1fr 1fr; } }

.sec {
  background: var(--paper);
  padding: 22px 22px 20px;
  text-decoration: none;
  display: block;
  transition: background .12s;
}
.sec:hover { background: var(--paper-2); }
.sec .n {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--trace-ink);
  letter-spacing: .1em;
}
.sec h3 { margin: 6px 0 6px; font-size: 1.16rem; }
.sec p { margin: 0; color: var(--ink-soft); font-size: .92rem; }
.sec .count {
  font-family: var(--mono);
  font-size: .72rem;
  color: var(--ink-mute);
  margin-top: 12px;
  display: block;
}

/* ---------- Encadré ---------- */
.note-box {
  border-left: 3px solid var(--trace);
  background: var(--paper-2);
  padding: 14px 18px;
  margin: 28px 0;
  font-size: .93rem;
  color: var(--ink-soft);
}
.note-box.warn { border-left-color: var(--danger); }
.note-box strong { color: var(--ink); }

/* ---------- Article converti depuis .txt ---------- */
.article { max-width: 74ch; }
.article h2 { margin: 40px 0 10px; font-size: 1.35rem; }
.article h3 { margin: 30px 0 8px; font-size: 1.08rem; color: var(--ink); }
.article p { margin: 0 0 14px; }
.article ul, .article ol { margin: 0 0 16px; padding-left: 1.35em; }
.article li { margin-bottom: 6px; }
.article hr { border: 0; border-top: 1px solid var(--line); margin: 30px 0; }
.article code {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 1px 5px;
  font-size: .88em;
}
.article pre {
  background: var(--screen);
  color: #e9e6df;
  border-radius: var(--r);
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: .86rem;
  line-height: 1.55;
}
.article pre code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; }
.article strong { font-weight: 600; }

/* ---------- Pied de page ---------- */
footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 48px;
  font-family: var(--mono);
  font-size: .74rem;
  color: var(--ink-mute);
}
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
footer a { color: var(--ink-soft); }

/* ---------- Fil d'ariane ---------- */
.crumb {
  font-family: var(--mono);
  font-size: .74rem;
  letter-spacing: .06em;
  color: var(--ink-mute);
  margin: 0 0 24px;
}
.crumb a { color: var(--ink-soft); text-decoration: none; border-bottom: 1px solid var(--line); }
.crumb a:hover { border-bottom-color: var(--trace); }