/* ============================================================
   DESIGN TOKENS — apertus. diagnostic
   Charte : Blanc cassé #F7F6F2 · Noir #0A0A0A · Blanc #FFFFFF · Jaune #FCCD03
   Typo : Gambarino = titres / Brockmann = tout le reste
   ============================================================ */

:root {
  /* --------- COULEURS (charte officielle) --------- */
  --color-bg:            #F7F6F2;   /* blanc cassé */
  --color-black:         #0A0A0A;   /* noir */
  --color-white:         #FFFFFF;   /* pur blanc */
  --color-accent:        #FCCD03;   /* jaune apertus */

  /* Dérivés fonctionnels */
  --color-fg:            var(--color-black);
  --color-fg-muted:      rgba(10, 10, 10, 0.62);
  --color-fg-subtle:     rgba(10, 10, 10, 0.40);
  --color-fg-inverse:    var(--color-bg);
  --color-fg-inverse-muted: rgba(247, 246, 242, 0.55);

  --color-bg-dark:       var(--color-black);
  --color-surface:       var(--color-white);

  --color-accent-hover:  #EFC000;
  --color-accent-ink:    var(--color-black);

  --color-border:        rgba(10, 10, 10, 0.12);
  --color-border-strong: rgba(10, 10, 10, 0.25);
  --color-border-inverse: rgba(247, 246, 242, 0.16);

  /* --------- TYPOGRAPHIE --------- */
  --font-display: "Gambarino", "Times New Roman", serif;
  --font-sans:    "Brockmann", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;

  /* Échelle display — grands formats éditoriaux */
  --fs-display-hero: clamp(3.4rem, 9.5vw, 9rem);    /* hero fullscreen */
  --fs-display-xl:   clamp(3rem, 6.5vw, 6.4rem);
  --fs-display-l:    clamp(2.4rem, 5vw, 4.4rem);
  --fs-h2:           clamp(2.2rem, 3.8vw, 3.5rem);  /* titres de section uniformisés */
  --fs-display-m:    clamp(1.9rem, 3.5vw, 3rem);
  --fs-display-s:    clamp(1.5rem, 2.2vw, 2rem);

  --fs-body-xl:    clamp(1.05rem, 1.3vw, 1.2rem);
  --fs-body-l:     1rem;
  --fs-body-m:     1rem;
  --fs-body-s:     0.9375rem;
  --fs-body-xs:    0.8125rem;
  --fs-body-2xs:   0.6875rem;

  --lh-tight:  0.98;
  --lh-snug:   1.15;
  --lh-normal: 1.5;
  --lh-relaxed: 1.65;

  --ls-tight:  -0.025em;
  --ls-normal: 0;
  --ls-wide:   0.12em;

  /* --------- ESPACEMENTS --------- */
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.5rem;
  --sp-6:  2rem;
  --sp-7:  2.5rem;
  --sp-8:  3rem;
  --sp-9:  4rem;
  --sp-10: 5.5rem;
  --sp-11: 7rem;
  --sp-12: 9rem;

  /* --------- RAYONS --------- */
  --radius-xs:   4px;
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   24px;
  --radius-xl:   36px;
  --radius-pill: 999px;
  --radius-circle: 50%;

  /* --------- ELEVATION --------- */
  --shadow-sm: 0 1px 2px rgba(10,10,10,0.05);
  --shadow-md: 0 6px 24px rgba(10,10,10,0.06);
  --shadow-lg: 0 20px 60px rgba(10,10,10,0.10);

  /* --------- MOTION --------- */
  --ease-out:      cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-in-out:   cubic-bezier(0.65, 0, 0.35, 1);
  --ease-expo:     cubic-bezier(0.16, 1, 0.3, 1);      /* reveals */
  --ease-expo-in:  cubic-bezier(0.7, 0, 0.84, 0);
  --dur-fast: 180ms;
  --dur-med:  360ms;
  --dur-slow: 700ms;
  --dur-reveal: 1100ms;
  --dur-page: 800ms;

  /* --------- LAYOUT --------- */
  --container-max: 1680px;
  --container-narrow: 880px;
  --container-prose: 680px;
  --gutter: clamp(1.25rem, 3vw, 3.5rem);
  --header-h: 4.5rem;
}

/* ============================================================
   RESET / BASE
   ============================================================ */

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

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-fg);
  font-family: var(--font-sans);
  font-size: var(--fs-body-l);
  line-height: var(--lh-normal);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body.is-loading { overflow: hidden; }

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

button {
  font: inherit;
  cursor: pointer;
  border: 0;
  background: none;
  color: inherit;
  padding: 0;
}

a { color: inherit; }

p { margin: 0 0 var(--sp-4); }
p:last-child { margin-bottom: 0; }

::selection { background: var(--color-accent); color: var(--color-black); }

/* ============================================================
   PRIMITIVES
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: var(--container-narrow); }
.container--prose  { max-width: var(--container-prose); }

/* Éyebrow — étiquette de section, uppercase tracké, dot jaune */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-sans);
  font-size: var(--fs-body-2xs);
  font-weight: 500;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-fg);
}
.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: var(--radius-circle);
  background: var(--color-accent);
  flex-shrink: 0;
}
.eyebrow--inverse { color: var(--color-fg-inverse); }

/* Tag pill — petite étiquette bordée, façon inspiration */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.7rem;
  font-size: var(--fs-body-2xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  color: var(--color-fg-muted);
  white-space: nowrap;
}

/* ============================================================
   BOUTONS — hover animé (texte qui bascule + sweep)
   ============================================================ */

.btn {
  --btn-bg: var(--color-accent);
  --btn-fg: var(--color-black);
  --btn-bg-hover: var(--color-black);
  --btn-fg-hover: var(--color-bg);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1.05rem 1.9rem;
  font-family: var(--font-sans);
  font-size: var(--fs-body-m);
  font-weight: 500;
  line-height: 1;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border-radius: var(--radius-pill);
  overflow: hidden;
  isolation: isolate;
  transition: color var(--dur-med) var(--ease-expo);
}

/* sweep circulaire qui monte depuis le bas */
.btn::before {
  content: "";
  position: absolute;
  inset: -2%;
  z-index: -1;
  background: var(--btn-bg-hover);
  border-radius: 50% 50% 0 0 / 75% 75% 0 0;
  transform: translateY(103%);
  transition: transform var(--dur-slow) var(--ease-expo), border-radius var(--dur-slow) var(--ease-expo);
}
.btn:hover::before {
  transform: translateY(0);
  border-radius: 0;
}
.btn:hover { color: var(--btn-fg-hover); }

/* label double : le texte glisse vers le haut, son clone entre par le bas.
   line-height élargie pour ne pas couper les descentes (g, p…),
   compensée en marge pour garder la même hauteur de bouton. */
.btn__label {
  position: relative;
  display: inline-block;
  overflow: hidden;
  line-height: 1.35;
  margin-block: -0.175em;
}
.btn__label > span {
  display: inline-block;
  transition: transform var(--dur-slow) var(--ease-expo);
}
.btn__label > span::after {
  content: attr(data-text);
  position: absolute;
  left: 0;
  top: 100%;
}
.btn:hover .btn__label > span { transform: translateY(-100%); }

/* flèche dans une pastille */
.btn__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9em;
  height: 1.9em;
  margin: -0.5em -0.6em -0.5em 0;
  border-radius: var(--radius-circle);
  background: rgba(10, 10, 10, 0.10);
  transition: background var(--dur-med) var(--ease-expo), transform var(--dur-slow) var(--ease-expo);
}
.btn__arrow svg {
  width: 0.85em;
  height: 0.85em;
  transition: transform var(--dur-slow) var(--ease-expo);
}
.btn:hover .btn__arrow {
  background: var(--color-accent);
  transform: rotate(45deg);
}
.btn:hover .btn__arrow svg { transform: rotate(-45deg); }

/* Variante sur fond sombre */
.btn--on-dark {
  --btn-bg: var(--color-accent);
  --btn-fg: var(--color-black);
  --btn-bg-hover: var(--color-bg);
  --btn-fg-hover: var(--color-black);
}

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

/* ============================================================
   REVEALS — apparitions au chargement / au scroll
   ============================================================ */

/* Lignes de titre masquées : chaque .reveal-line contient un span qui monte */
.reveal-line {
  display: block;
  overflow: hidden;
}
.reveal-line > .reveal-line__inner {
  display: block;
  transform: translateY(112%);
  transition: transform var(--dur-reveal) var(--ease-expo);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: transform;
}
.is-revealed .reveal-line > .reveal-line__inner,
.reveal-line.is-revealed > .reveal-line__inner { transform: translateY(0); }

/* Fade-up générique */
.reveal-fade {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--dur-reveal) var(--ease-expo),
    transform var(--dur-reveal) var(--ease-expo);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
.is-revealed .reveal-fade,
.reveal-fade.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Clip vertical pour les médias */
.reveal-clip {
  clip-path: inset(100% 0 0 0);
  transition: clip-path var(--dur-reveal) var(--ease-expo);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: clip-path;
}
.is-revealed .reveal-clip,
.reveal-clip.is-revealed { clip-path: inset(0 0 0 0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal-line > .reveal-line__inner { transform: none; }
  .reveal-fade { opacity: 1; transform: none; }
  .reveal-clip { clip-path: none; }
}