/* ==========================================================================
   Base — reset, typographie de fond, décor cosmique global
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--color-void);
  color: var(--color-text-soft);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 350;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Nébuleuse de fond : trois nappes radiales fixes derrière tout le document. */
body::before {
  content: "";
  position: fixed;
  inset: -20%;
  z-index: -3;
  pointer-events: none;
  background:
    radial-gradient(58% 44% at 78% 8%, oklch(38% 0.09 232 / 0.5), transparent 68%),
    radial-gradient(48% 40% at 12% 26%, oklch(31% 0.08 292 / 0.42), transparent 70%),
    radial-gradient(70% 52% at 50% 108%, oklch(30% 0.07 244 / 0.55), transparent 72%),
    linear-gradient(178deg, var(--color-void), var(--color-abyss) 55%, var(--color-void));
}

/* Grain fin : sort le fond du dégradé « plastique ». */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: 0.005em;
  color: var(--color-text);
  text-transform: uppercase;
}

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-flame);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out-expo);
}

a:hover {
  color: var(--color-flame-bright);
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

strong,
b {
  color: var(--color-text);
  font-weight: 600;
}

em {
  color: var(--color-flame);
  font-style: normal;
  font-weight: 500;
}

::selection {
  background: var(--color-flame);
  color: var(--color-void);
}

:focus-visible {
  outline: 2px solid var(--color-flame-bright);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 200;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--color-flame);
  color: var(--color-void);
  font-weight: 600;
  transform: translateY(-160%);
  transition: transform var(--duration-fast) var(--ease-out-expo);
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* Barre de défilement accordée à la Flamme. */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-void);
}

::-webkit-scrollbar-thumb {
  border-radius: var(--radius-pill);
  background: linear-gradient(var(--color-flame-ink), var(--color-flame-deep));
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-flame);
}