/* ===================================================
   base.css — reset, typographie globale, atmosphère
   =================================================== */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}

body {
  font-family: var(--font-body);
  font-weight: var(--weight-light);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-secondary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

/* Atmosphère : halo bleu profond fixe derrière toute la page */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(47,86,240,0.16), transparent 55%),
    radial-gradient(90% 60% at 85% 110%, rgba(47,86,240,0.10), transparent 60%),
    var(--color-bg);
  pointer-events: none;
}

/* Grain filmique global */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  opacity: 0.045;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

::selection {
  background: var(--brand);
  color: #fff;
}

/* Scrollbar discrète */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: var(--radius-full);
  border: 3px solid var(--color-bg);
}
::-webkit-scrollbar-thumb:hover { background: var(--brand); }

/* ---------- Typographie globale ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-text-primary);
  font-weight: var(--weight-regular);
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
}

p { text-wrap: pretty; }

a { color: inherit; text-decoration: none; }

/* ---------- Largeur de contenu ---------- */
.shell {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Label mono ---------- */
.label-mono {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--brand-light);
}
.label-mono::before {
  content: '';
  width: 2rem;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}
.label-mono.is-centered::after {
  content: '';
  width: 2rem;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--duration-base) var(--ease-power),
              background var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.btn .btn-arrow { transition: transform var(--duration-base) var(--ease-power); }
.btn:hover .btn-arrow { transform: translateX(4px); }

.btn-primary {
  color: #fff;
  background: var(--cta-gradient);
  background-size: 160% 160%;
  background-position: 0% 50%;
  box-shadow: 0 10px 34px var(--cta-glow);
  transition: transform var(--duration-base) var(--ease-power),
              background-position var(--duration-slow) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}
.btn-primary::after {
  content: '';
  position: absolute;
  top: 0; left: -120%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.38), transparent);
  transition: left 0.6s var(--ease-out);
}
.btn-primary:hover {
  background-position: 100% 50%;
  transform: translateY(-2px);
  box-shadow: 0 16px 50px var(--cta-glow);
}
.btn-primary:hover::after { left: 120%; }

.btn-ghost {
  color: var(--color-text-primary);
  background: transparent;
  border-color: var(--color-border-strong);
}
.btn-ghost:hover {
  border-color: var(--brand);
  color: var(--brand-light);
  transform: translateY(-2px);
}

/* ---------- Pattern reveal (scroll) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--duration-enter) var(--ease-power),
              transform var(--duration-enter) var(--ease-power);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }
.reveal[data-delay="5"] { transition-delay: 0.40s; }

/* Texte qui se révèle ligne par ligne (masque) */
.line-mask { overflow: hidden; display: block; }
.line-mask > span {
  display: block;
  transform: translateY(110%);
  transition: transform 0.9s var(--ease-power);
}
.is-loaded .line-mask > span { transform: translateY(0); }

/* Accessibilité : focus visible */
:focus-visible {
  outline: 2px solid var(--brand-light);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}