/* =====================================================================
   Sections — Hero (oscilloscope) + composants narratifs
   ===================================================================== */

/* ---------------- HERO ---------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: center;
  background:
    radial-gradient(120% 90% at 80% -10%, #14304a 0%, transparent 55%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-abyss) 100%);
  color: var(--on-dark);
  overflow: hidden;
  isolation: isolate;
}

/* Grille type oscilloscope */
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(120,160,200,0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(120,160,200,0.06) 1px, transparent 1px);
  background-size: clamp(38px, 4.5vw, 68px) clamp(38px, 4.5vw, 68px);
  mask-image: radial-gradient(120% 100% at 50% 40%, #000 55%, transparent 100%);
  z-index: -2;
}

/* Trace réflectogramme (SVG plein cadre) */
.hero__signal {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  z-index: -1;
  opacity: 0.9;
}
.hero__signal .trace {
  fill: none;
  stroke: var(--signal);
  stroke-width: 2;
  filter: drop-shadow(0 0 6px var(--glow-petrol));
}
.hero__signal .trace-ghost {
  fill: none;
  stroke: rgba(124, 224, 255, 0.18);
  stroke-width: 1;
}
.hero__signal .peak-label {
  fill: var(--on-dark-soft);
  font-family: var(--font-mono);
  font-size: 12px;
}
.hero__signal .peak-dot { fill: var(--amber); }

.hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: clamp(1.4rem, 3vw, 2.4rem);
  padding-block: 14vh 10vh;
}

.hero__kicker {
  font-family: var(--font-mono);
  font-size: var(--t-small);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--signal);
  display: flex; align-items: center; gap: 0.8rem;
}
.hero__kicker::before {
  content: ""; width: 34px; height: 1px; background: var(--signal); opacity: 0.7;
}

.hero__title {
  font-size: var(--t-hero);
  color: #fff;
  font-weight: 500;
  letter-spacing: -0.02em;
  max-width: 16ch;
}
.hero__title em {
  font-style: italic;
  color: var(--signal-2);
  font-weight: 460;
}

.hero__sub {
  font-size: var(--t-lead);
  color: var(--on-dark-soft);
  max-width: 54ch;
  font-weight: 360;
}

.hero__meta {
  display: flex; flex-wrap: wrap; gap: 1.4rem 2.4rem;
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--t-small);
  color: var(--on-dark-soft);
}
.hero__meta .k { color: var(--on-dark-faint); display: block; font-size: var(--t-micro); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 0.25rem; }
.hero__meta .v { color: var(--on-dark); }

.scroll-cue {
  position: absolute;
  bottom: clamp(1.2rem, 3vh, 2.4rem);
  left: 50%; transform: translateX(-50%);
  z-index: 3;
  display: grid; justify-items: center; gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--t-micro);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--on-dark-faint);
}
.scroll-cue .rail {
  width: 1px; height: 46px;
  background: linear-gradient(var(--signal), transparent);
  position: relative; overflow: hidden;
}
.scroll-cue .rail::after {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 40%;
  background: var(--signal);
  animation: cue 2.1s var(--ease-in-out) infinite;
}

/* ---------------- Statistiques (bandeau) ---------------- */
.stat-band {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
}
/* colonnes réparties automatiquement quel que soit le nombre de chiffres clés */
@media (min-width: 720px) { .stat-band { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: 1fr; } }
.stat {
  background: var(--bg-navy);
  padding: clamp(1.2rem, 2.5vw, 2rem) clamp(1rem, 2vw, 1.5rem);
  display: grid; gap: 0.35rem;
}
.stat .num {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 1.4rem + 3vw, 3.6rem);
  color: #fff; line-height: 1;
  font-variant-numeric: tabular-nums;
}
.stat .num .u { font-size: 0.45em; color: var(--signal); margin-left: 0.15em; }
.stat--trl { container-type: inline-size; min-width: 0; }
.stat--trl .num { white-space: nowrap; font-size: min(3.6rem, 22cqi); }
.stat .cap { font-size: var(--t-small); color: var(--on-dark-soft); }

/* ---------------- Carte de sous-chapitre ---------------- */
.subcards {
  display: grid; gap: 1.25rem;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 2rem;
}
.subcard {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem 1.6rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur);
  overflow: hidden;
}
.subcard::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
  background: var(--accent, var(--petrol)); transform: scaleX(0); transform-origin: 0;
  transition: transform var(--dur) var(--ease-out);
}
.subcard:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.subcard:hover::before { transform: scaleX(1); }
.subcard h4 a { color: inherit; }
.subcard h4 a::after { content: ""; position: absolute; inset: 0; z-index: 1; }
.subcard:has(a:focus-visible) { outline: 2px solid var(--neon); outline-offset: 4px; }
.subcard:has(a:focus-visible)::before { transform: scaleX(1); }
.movement[id], #pa-trajectoire, #pe-strategie, #pe-recherche { scroll-margin-top: 5.5rem; }
.subcard .n {
  font-family: var(--font-mono); font-size: var(--t-micro);
  color: var(--accent, var(--petrol)); letter-spacing: 0.1em;
}
.subcard h4 {
  font-size: clamp(0.95rem, 0.72rem + 0.62vw, 1.15rem);
  margin: 0.5rem 0 0.6rem; color: var(--ink);
  overflow-wrap: break-word; hyphens: auto;
}
.subcard p { font-size: var(--t-small); color: var(--ink-soft); line-height: 1.55; }
.subcard__timeline {
  padding-left: 1.15rem; font-size: var(--t-small);
  color: var(--ink-soft); line-height: 1.55; list-style: disc;
}
.subcard__timeline li + li { margin-top: 0.4rem; }
.subcard__timeline strong { color: var(--ink); }
.subcards:has(> .subcard:nth-child(4)) { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 760px) {
  .subcards, .subcards:has(> .subcard:nth-child(4)) { grid-template-columns: minmax(0, 1fr); }
}

/* Note latérale / encart */
.aside-note {
  border-left: 3px solid var(--amber);
  background: color-mix(in srgb, var(--amber) 8%, var(--paper));
  padding: 1rem 1.25rem; border-radius: 0 10px 10px 0;
  font-size: var(--t-small); color: var(--ink-soft);
}
.aside-note .t { font-family: var(--font-mono); font-size: var(--t-micro); letter-spacing: 0.12em; text-transform: uppercase; color: var(--amber-d); display:block; margin-bottom: 0.4rem; }