/* ============================================================
   SPHAERAPLAS — DESIGN SYSTEM
   Direction : matière brute industrielle. Le vocabulaire visuel
   d'une plaque signalétique d'atelier et de la texture même du
   plastique thermocompressé (grain, mouchetures), pas celui
   d'une start-up SaaS. Un seul accent : le jaune sécurité
   industriel, utilisé avec parcimonie.
   ============================================================ */

/* Polices auto-hébergées (pas d'appel à Google Fonts : plus rapide,
   fonctionne hors-ligne, et évite un transfert de données tiers). */
@font-face {
  font-family: "Big Shoulders Display";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/big-shoulders-display-latin-600-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Big Shoulders Display";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/big-shoulders-display-latin-700-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Big Shoulders Display";
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url("../fonts/big-shoulders-display-latin-800-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/inter-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/inter-latin-500-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/inter-latin-600-normal.woff2") format("woff2");
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/inter-latin-700-normal.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-latin-600-normal.woff2") format("woff2");
}

:root {
  /* Palette — dérivée de la matière réelle, pas d'un nuancier générique */
  --ink: #17140f;          /* noir chaud, quasi-charbon */
  --ink-soft: #4a453d;     /* texte secondaire */
  --bone: #efeae0;         /* fond papier / os */
  --bone-deep: #e2dbc9;    /* fond de section alterné */
  --concrete: #b9b2a4;     /* bordures, filets */
  --concrete-light: #d8d2c4;
  --yellow: #f5c400;       /* accent unique — jaune sécurité industrielle */
  --yellow-deep: #d9a800;
  --rust: #b8441e;         /* alerte / accent secondaire rare */
  --paper-white: #faf8f3;

  --font-display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background-color: var(--bone);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

.scroll-mt-28 { scroll-margin-top: 7rem; }

/* ---------- Typography ---------- */

.font-display { font-family: var(--font-display); }
.font-mono { font-family: var(--font-mono); }

h1, h2, h3, h4, .display {
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  line-height: 0.95;
  color: var(--ink);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--ink-soft);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}

.eyebrow::before {
  content: "";
  width: 1.4em;
  height: 2px;
  background: var(--yellow);
  display: inline-block;
}

.eyebrow--invert { color: var(--bone); }

.lede {
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.65;
  max-width: 42rem;
}

/* ---------- Links / nav ---------- */

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: color 0.15s ease;
}
.nav-link:hover, .nav-link.is-active { color: var(--ink); }
.nav-link.is-active { border-bottom: 2px solid var(--yellow); padding-bottom: 4px; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 1rem 1.75rem;
  border-radius: 3px;
  border: 1.5px solid var(--ink);
  transition: transform 0.15s ease, background-color 0.15s ease, color 0.15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid var(--yellow); outline-offset: 2px; }

.btn-primary { background: var(--ink); color: var(--paper-white); }
.btn-primary:hover { background: var(--yellow); color: var(--ink); border-color: var(--yellow); }

.btn-outline { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-outline:hover { background: var(--ink); color: var(--paper-white); }

.btn-invert { background: var(--yellow); color: var(--ink); border-color: var(--yellow); }
.btn-invert:hover { background: var(--paper-white); border-color: var(--paper-white); }

/* ---------- Surfaces ---------- */

.panel {
  background: var(--paper-white);
  border: 1px solid var(--concrete-light);
}

.panel-dark {
  background: var(--ink);
  color: var(--bone);
  border: 1px solid #33302a;
}

.plate {
  border: 1px solid var(--concrete);
  background: var(--paper-white);
  position: relative;
}

/* Corner ticks — evoke a spec plate / technical drawing, not decoration */
.plate::before, .plate::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-top: 2px solid var(--ink);
  border-left: 2px solid var(--ink);
  top: -1px;
  left: -1px;
}
.plate::after {
  top: auto; left: auto; bottom: -1px; right: -1px;
  border-top: none; border-left: none;
  border-bottom: 2px solid var(--ink);
  border-right: 2px solid var(--ink);
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.35em 0.7em;
  border: 1px solid var(--ink);
  color: var(--ink);
}
.tag--yellow { background: var(--yellow); border-color: var(--yellow); }
.tag--invert { border-color: var(--bone); color: var(--bone); }

/* ---------- Material texture (signature element) ----------
   A speckled / terrazzo pattern approximating the aggregate
   surface of thermo-compressed recycled plastic — this is the
   brand's actual material, not a decorative pattern. */

.material-texture {
  background-color: var(--bone-deep);
  background-image:
    radial-gradient(circle at 8% 22%, var(--ink) 0 3px, transparent 4px),
    radial-gradient(circle at 27% 68%, var(--yellow) 0 4px, transparent 5px),
    radial-gradient(circle at 52% 14%, var(--concrete) 0 3px, transparent 4px),
    radial-gradient(circle at 71% 55%, var(--ink) 0 2px, transparent 3px),
    radial-gradient(circle at 88% 30%, var(--concrete) 0 4px, transparent 5px),
    radial-gradient(circle at 15% 90%, var(--concrete) 0 2px, transparent 3px),
    radial-gradient(circle at 63% 85%, var(--yellow) 0 3px, transparent 4px),
    radial-gradient(circle at 95% 78%, var(--ink) 0 3px, transparent 4px),
    radial-gradient(circle at 40% 40%, var(--concrete) 0 2px, transparent 3px);
  background-size: 220px 220px;
  background-repeat: repeat;
}

.material-texture--dark {
  background-color: var(--ink);
  background-image:
    radial-gradient(circle at 8% 22%, var(--bone) 0 3px, transparent 4px),
    radial-gradient(circle at 27% 68%, var(--yellow) 0 4px, transparent 5px),
    radial-gradient(circle at 52% 14%, #55504a 0 3px, transparent 4px),
    radial-gradient(circle at 71% 55%, var(--bone) 0 2px, transparent 3px),
    radial-gradient(circle at 88% 30%, #55504a 0 4px, transparent 5px),
    radial-gradient(circle at 15% 90%, #55504a 0 2px, transparent 3px),
    radial-gradient(circle at 63% 85%, var(--yellow) 0 3px, transparent 4px),
    radial-gradient(circle at 95% 78%, var(--bone) 0 3px, transparent 4px);
  background-size: 220px 220px;
}

/* ---------- Hazard divider ----------
   A thin diagonal-stripe rule used only at true section
   transitions — echoes industrial hazard marking, used sparingly. */

.hazard-rule {
  height: 6px;
  background-image: repeating-linear-gradient(
    -45deg,
    var(--ink) 0 10px,
    var(--yellow) 10px 20px
  );
}

/* ---------- Numbered process step ---------- */

.step-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* ---------- Utility ---------- */

.text-yellow { color: var(--yellow-deep); }
.bg-yellow { background: var(--yellow); }
.border-hairline { border-color: var(--concrete); }
.sharp { border-radius: 2px; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* Cookie banner + form (kept from prior implementation, restyled) */
#cookie-banner a { color: var(--yellow); }

/* ---------- Site header (fixed, translucent) ----------
   Tailwind's opacity modifier on an arbitrary var() won't reliably
   apply to a hex custom property, so the translucent header uses a
   dedicated rule instead of bg-[var(--paper-white)]/95. */
.site-header {
  background-color: rgba(250, 248, 243, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.radio-card { display:none; }
.radio-card:checked + label {
  border-color: var(--yellow);
  background: #fdf6d8;
}
.radio-card:checked + label .radio-icon {
  transform: scale(1.08);
}