/* Tokens de la charte graphique KrystLab (thème sombre, préfixe kl-). */
@font-face {
  font-family: "Inter";
  src: url("/commun/inter-latin.woff2") format("woff2");
  font-weight: 400 800;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: dark;

  --kl-bg: #0b1020;
  --kl-surface: rgba(255, 255, 255, .06);
  --kl-surface-2: rgba(255, 255, 255, .09);
  --kl-border: rgba(255, 255, 255, .14);
  --kl-text: rgba(255, 255, 255, .92);
  --kl-text-2: rgba(255, 255, 255, .74);
  --kl-text-3: rgba(255, 255, 255, .58);
  --kl-text-white: #fff;
  --kl-text-dark: #071022;

  --kl-indigo: #6366f1;
  --kl-indigo-2: #4f46e5;
  --kl-teal: #14b8a6;
  --kl-teal-2: #0d9488;
  --kl-amber: #f59e0b;
  --kl-amber-2: #d97706;
  --kl-indigo-rgb: 99, 102, 241;
  --kl-teal-rgb: 20, 184, 166;
  --kl-amber-rgb: 245, 158, 11;

  --kl-bg-gradient:
    radial-gradient(60rem 30rem at 12% -10%, rgba(var(--kl-indigo-rgb), .22), transparent 60%),
    radial-gradient(50rem 26rem at 92% -6%, rgba(var(--kl-teal-rgb), .14), transparent 60%),
    radial-gradient(36rem 22rem at 60% 0%, rgba(var(--kl-amber-rgb), .06), transparent 60%),
    linear-gradient(180deg, #0b1020, #0b1020);
  --kl-card-bg: linear-gradient(180deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .05));
  --kl-nav-bg: rgba(7, 11, 20, .72);
  --kl-shadow: 0 20px 60px rgba(0, 0, 0, .35);
  --kl-shadow-sm: 0 12px 30px rgba(var(--kl-indigo-rgb), .20);

  --kl-font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --kl-fw-regular: 400;
  --kl-fw-medium: 500;
  --kl-fw-semibold: 600;
  --kl-fw-bold: 700;
  --kl-fw-extrabold: 800;
  --kl-fs-h1: clamp(1.5rem, 1.1rem + 1.6vw, 2.1rem);
  --kl-fs-h2: 1.12rem;
  --kl-fs-body: 1rem;
  --kl-fs-small: .95rem;
  --kl-fs-xs: .85rem;
  --kl-lh-tight: 1.08;
  --kl-lh-snug: 1.3;
  --kl-lh-normal: 1.6;

  --kl-space-1: .25rem;
  --kl-space-2: .5rem;
  --kl-space-3: .75rem;
  --kl-space-4: 1rem;
  --kl-space-5: 1.25rem;
  --kl-space-6: 1.5rem;
  --kl-space-8: 2rem;

  --kl-radius: 18px;
  --kl-radius-sm: 12px;
  --kl-radius-full: 999px;
  --kl-transition-fast: 150ms ease;
  --kl-transition-normal: 250ms ease;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--kl-bg);
  color: var(--kl-text);
  font-family: var(--kl-font);
  font-size: var(--kl-fs-body);
  line-height: var(--kl-lh-normal);
}

:focus-visible {
  outline: 3px solid rgba(var(--kl-amber-rgb), .55);
  outline-offset: 2px;
  border-radius: var(--kl-radius-sm);
}

::selection { background: rgba(var(--kl-indigo-rgb), .3); color: #fff; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* Boutons : primaire (dégradé indigo vers teal) et fantôme. */
.btn-kl, .btn-kl-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--kl-space-2);
  min-height: 44px;
  padding: .7rem 1.1rem;
  border: 1px solid transparent;
  border-radius: var(--kl-radius-full);
  font: inherit;
  font-weight: var(--kl-fw-bold);
  line-height: 1.2;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--kl-transition-fast), box-shadow var(--kl-transition-fast), background var(--kl-transition-fast);
}
.btn-kl {
  background: linear-gradient(135deg, var(--kl-indigo), var(--kl-teal));
  color: var(--kl-text-dark);
  box-shadow: var(--kl-shadow-sm);
}
.btn-kl:hover { transform: translateY(-1px); }
.btn-kl:active { transform: translateY(0); }
.btn-kl-ghost {
  background: var(--kl-surface);
  border-color: var(--kl-border);
  color: var(--kl-text-white);
}
.btn-kl-ghost:hover { background: var(--kl-surface-2); }
.btn-kl--sm { min-height: 40px; padding: .45rem .9rem; font-size: var(--kl-fs-small); }