/* ============================================================
   JLDW — Design System 2026
   Stelair SARL · Charte graphique stricte
   ============================================================ */

:root {
  --c-ink: #1a1a1a;
  --c-paper: #f5f5f5;
  --c-gray: #4a4a4a;
  --c-gray-soft: #6a6a6a;
  --c-gold: #b8860b;

  --rule-on-dark: rgba(245, 245, 245, 0.08);
  --rule-on-light: rgba(26, 26, 26, 0.10);
  --hair-on-dark: rgba(245, 245, 245, 0.14);
  --hair-on-light: rgba(26, 26, 26, 0.18);

  --pad-section: 120px;
  --pad-section-tight: 80px;
  --content-max: 780px;
  --grid-max: 1100px;

  --f-display: "Playfair Display", "Times New Roman", serif;
  --f-text: "Inter", system-ui, -apple-system, sans-serif;
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--f-text);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.7;
  color: var(--c-ink);
  background: var(--c-paper);
  text-rendering: optimizeLegibility;
}

img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; background: none; border: 0; color: inherit; }

/* ------------ Typography ------------ */
.h-display {
  font-family: var(--f-display);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-size: clamp(40px, 6vw, 88px);
}
.h-title {
  font-family: var(--f-display);
  font-weight: 400;
  line-height: 1.12;
  font-size: clamp(32px, 4vw, 56px);
  letter-spacing: -0.005em;
}
.h-sub {
  font-family: var(--f-display);
  font-style: italic;
  font-weight: 400;
  line-height: 1.3;
  font-size: clamp(20px, 2vw, 26px);
  color: var(--c-gray);
}
.lead {
  font-size: 19px;
  line-height: 1.7;
  color: var(--c-gray);
  max-width: 62ch;
}
p { max-width: 68ch; }

/* Labels */
.label {
  font-family: var(--f-text);
  font-weight: 600;
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--c-gold);
  display: inline-flex;
  align-items: center;
  gap: 16px;
}
.label::after {
  content: "";
  display: inline-block;
  width: 40px;
  height: 1px;
  background: var(--c-gold);
}
.label--standalone::after { display: none; }

/* Section framing */
section {
  padding: var(--pad-section) 32px;
  position: relative;
}
section.tight { padding: var(--pad-section-tight) 32px; }

.ink { background: var(--c-ink); color: var(--c-paper); }
.ink .h-sub { color: #bfbfbf; }
.ink .lead { color: #c8c8c8; }
.paper { background: var(--c-paper); color: var(--c-ink); }

.container {
  max-width: var(--content-max);
  margin: 0 auto;
}
.container-wide {
  max-width: var(--grid-max);
  margin: 0 auto;
}

/* Gold separator */
.sep {
  width: 40px;
  height: 1px;
  background: var(--c-gold);
  display: block;
  margin: 32px 0;
}
.sep--center { margin-left: auto; margin-right: auto; }

/* ------------ Buttons ------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 20px 44px;
  font-family: var(--f-text);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  background: var(--c-gold);
  color: var(--c-paper);
  transition: transform .3s ease, background .3s ease, opacity .3s ease;
  border: 1px solid var(--c-gold);
}
.btn:hover { background: #a3760a; border-color: #a3760a; }
.btn--ghost {
  background: transparent;
  color: var(--c-gold);
}
.btn--ghost:hover { background: var(--c-ink); color: var(--c-gold); border-color: var(--c-gold); }
.ink .btn--ghost { color: var(--c-gold); }

.btn-arrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--f-text);
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--c-gold);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, gap .3s ease;
}
.btn-arrow:hover { border-color: var(--c-gold); gap: 18px; }
.btn-arrow::after { content: "→"; font-size: 14px; }

/* ------------ Nav ------------ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 32px;
  background: rgba(26, 26, 26, 0.88);
  backdrop-filter: blur(12px);
  color: var(--c-paper);
  border-bottom: 1px solid var(--rule-on-dark);
  transition: background .4s ease;
}
.nav__brand {
  font-family: var(--f-display);
  font-size: 18px;
  letter-spacing: 0.01em;
}
.nav__brand small {
  display: block;
  font-family: var(--f-text);
  font-size: 9px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-top: 2px;
}

.nav__mono {
  display: inline-flex;
  align-items: baseline;
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--c-paper);
}
.nav__mono-letters { display: inline-block; }
.nav__mono-dot {
  color: var(--c-gold);
  margin-left: 1px;
  font-weight: 700;
}
.nav__links {
  display: flex;
  gap: 36px;
  align-items: center;
  font-family: var(--f-text);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
}
.nav__links a {
  opacity: .75;
  transition: opacity .25s ease, color .25s ease;
}
.nav__links a:hover { opacity: 1; color: var(--c-gold); }
.nav__cta {
  border: 1px solid var(--c-gold);
  color: var(--c-gold);
  padding: 10px 18px;
  font-size: 10px;
  letter-spacing: 0.24em;
  transition: background .3s ease, color .3s ease;
}
.nav__cta:hover { background: var(--c-gold); color: var(--c-paper); opacity: 1 !important; }

@media (max-width: 820px) {
  .nav__links { display: none; }
  .nav__brand small { display: none; }
}

/* ------------ Footer ------------ */
.footer {
  background: var(--c-ink);
  color: var(--c-paper);
  padding: 80px 32px 40px;
  border-top: 1px solid var(--rule-on-dark);
}
.footer__grid {
  max-width: var(--grid-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 60px;
  border-bottom: 1px solid var(--rule-on-dark);
}
.footer h5 {
  font-family: var(--f-text);
  font-weight: 600;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 24px;
}
.footer ul { list-style: none; }
.footer ul li { margin-bottom: 12px; font-size: 14px; color: #bfbfbf; }
.footer ul li a:hover { color: var(--c-gold); }
.footer__brand {
  font-family: var(--f-display);
  font-size: 26px;
  margin-bottom: 14px;
}
.footer__tag {
  font-family: var(--f-display);
  font-style: italic;
  color: #bfbfbf;
  font-size: 16px;
  max-width: 32ch;
  line-height: 1.5;
}
.footer__legal {
  max-width: var(--grid-max);
  margin: 30px auto 0;
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #7a7a7a;
}
@media (max-width: 820px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer__legal { flex-direction: column; gap: 16px; }
}

/* ------------ Placeholder visuals ------------ */
.ph {
  position: relative;
  overflow: hidden;
  background:
    repeating-linear-gradient(
      45deg,
      rgba(245, 245, 245, 0.04) 0,
      rgba(245, 245, 245, 0.04) 1px,
      transparent 1px,
      transparent 14px
    ),
    #111;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(245, 245, 245, 0.5);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border: 1px solid var(--rule-on-dark);
}
.ph--light {
  background:
    repeating-linear-gradient(
      45deg,
      rgba(26, 26, 26, 0.05) 0,
      rgba(26, 26, 26, 0.05) 1px,
      transparent 1px,
      transparent 14px
    ),
    #ececec;
  color: rgba(26, 26, 26, 0.45);
  border-color: var(--rule-on-light);
}

/* Abstract geometry svg */
.geo {
  position: absolute;
  pointer-events: none;
  opacity: .9;
}

/* ------------ Reveal animation ------------ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .9s ease, transform .9s ease;
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }

/* Quote */
.quote {
  border-left: 2px solid var(--c-gold);
  padding: 8px 0 8px 32px;
  font-family: var(--f-display);
  font-style: italic;
  font-size: 22px;
  line-height: 1.55;
  color: inherit;
}
.quote cite {
  display: block;
  margin-top: 18px;
  font-family: var(--f-text);
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-gold);
}

/* Card */
.card {
  padding: 40px;
  border: 1px solid var(--rule-on-light);
  background: var(--c-paper);
  transition: border-color .3s ease, transform .4s ease;
}
.ink .card {
  background: var(--c-ink);
  border-color: var(--rule-on-dark);
}
.card:hover { border-color: var(--c-gold); }

/* Utility */
.center { text-align: center; }
.mt-s { margin-top: 16px; }
.mt-m { margin-top: 32px; }
.mt-l { margin-top: 56px; }
.mt-xl { margin-top: 80px; }
.mb-m { margin-bottom: 32px; }
.mb-l { margin-bottom: 56px; }

/* ============================================================
   Tweak panel
   ============================================================ */
.tweak-panel {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 100;
  background: #0e0e0e;
  color: var(--c-paper);
  border: 1px solid rgba(184, 134, 11, 0.4);
  padding: 20px 22px;
  width: 280px;
  display: none;
  font-family: var(--f-text);
}
.tweak-panel.open { display: block; }
.tweak-panel h4 {
  font-family: var(--f-text);
  font-weight: 600;
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 18px;
}
.tweak-panel label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #bfbfbf;
  margin: 14px 0 6px;
}
.tweak-panel select,
.tweak-panel input[type=range] {
  width: 100%;
  background: #1a1a1a;
  color: var(--c-paper);
  border: 1px solid rgba(245,245,245,0.12);
  padding: 8px 10px;
  font: inherit;
  font-size: 12px;
}
.tweak-panel input[type=range] { padding: 0; }
.tweak-panel .val {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--c-gold);
}