/* ============================================================
   VALETIA ONE — Site vitrine · tokens partagés
   Hérités du système "Le Cahier" (app)
   ============================================================ */

:root {
  /* Papier (light) */
  --paper:      #F1ECE0;
  --paper-hi:   #F8F4EA;
  --paper-lo:   #E5DECC;
  --paper-edge: #D9D1BC;

  /* Encre */
  --ink:        #161B23;
  --ink-soft:   #34394A;
  --ink-muted:  #5E6675;
  --ink-fade:   #9098A6;

  /* Nuit (dark) */
  --night:      #0F141B;
  --night-hi:   #161D27;
  --night-lo:   #0A0E14;
  --night-edge: #2B3340;
  --night-ink:       #ECEEF2;
  --night-ink-soft:  #C5CAD4;
  --night-ink-muted: #8590A0;
  --night-ink-fade:  #5C6473;

  /* Brand */
  --cyan:   #3DC5E8;
  --blue:   #2A6FE8;
  --violet: #9C5BE8;
  --indigo: #2A3DA8;
  --brique: #A0492D;
  --vert-ok:#5B8C5A;

  --grad: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 55%, var(--violet) 100%);
  --grad-soft: linear-gradient(135deg, rgba(61,197,232,0.12) 0%, rgba(42,111,232,0.12) 55%, rgba(156,91,232,0.12) 100%);

  /* Typo */
  --font-serif: "Fraunces", "Times New Roman", Georgia, serif;
  --font-sans:  "Geist", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono:  "Geist Mono", ui-monospace, SFMono-Regular, monospace;

  /* Rayons */
  --r-sm: 8px; --r-md: 14px; --r-lg: 22px; --r-xl: 32px;
}

* { box-sizing: border-box; -webkit-font-smoothing: antialiased; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: -0.005em;
  color: var(--ink);
  background: var(--paper);
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

/* ─── Typo helpers ─── */
.serif {
  font-family: var(--font-serif);
  font-variation-settings: "opsz" 30, "SOFT" 50, "WONK" 0;
  letter-spacing: -0.01em;
}
.serif-display {
  font-family: var(--font-serif);
  font-weight: 420;
  font-variation-settings: "opsz" 144, "SOFT" 100, "WONK" 1;
  letter-spacing: -0.02em;
  line-height: 0.98;
}
.serif-italic {
  font-family: var(--font-serif);
  font-style: italic;
  font-variation-settings: "opsz" 30, "SOFT" 80, "WONK" 1;
}
.mono { font-family: var(--font-mono); }
.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-muted);
}
.brand-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ─── Texture papier ─── */
.paper-noise {
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.10  0 0 0 0 0.12  0 0 0 0 0.10  0 0 0 0.14 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}
.night-noise {
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.85  0 0 0 0 0.90  0 0 0 0 1.00  0 0 0 0.045 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* ─── Boutons ─── */
.btn-grad {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 28px;
  background: var(--grad);
  color: #fff;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 15px;
  text-decoration: none;
  box-shadow: 0 8px 26px -10px rgba(42,111,232,0.55);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-grad:hover { transform: translateY(-2px); box-shadow: 0 14px 36px -12px rgba(156,91,232,0.6); }
.btn-grad .soon {
  font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.16em;
  text-transform: uppercase; opacity: 0.85;
  border: 1px solid rgba(255,255,255,0.45); border-radius: 99px; padding: 3px 8px;
}
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 15px 24px;
  border-radius: 999px;
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.1em; text-transform: uppercase;
  text-decoration: none;
  border: 1px solid currentColor;
  opacity: 0.75;
  transition: opacity 0.2s ease;
}
.btn-ghost:hover { opacity: 1; }

/* ─── Reveals au scroll ─── */
.rv {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.9s cubic-bezier(0.2, 0.65, 0.25, 1), transform 0.9s cubic-bezier(0.2, 0.65, 0.25, 1);
}
.rv.in { opacity: 1; transform: none; }
.rv-d1 { transition-delay: 0.08s; }
.rv-d2 { transition-delay: 0.18s; }
.rv-d3 { transition-delay: 0.28s; }
.rv-d4 { transition-delay: 0.40s; }
.rv-d5 { transition-delay: 0.55s; }

/* Reveal par lignes masquées (titres hero) */
.line-mask { display: block; overflow: hidden; }
.line-mask > span {
  display: block;
  transform: translateY(110%);
  transition: transform 1s cubic-bezier(0.22, 0.8, 0.2, 1);
}
.loaded .line-mask > span, .line-mask.in > span { transform: translateY(0); }
.line-mask:nth-child(2) > span { transition-delay: 0.12s; }
.line-mask:nth-child(3) > span { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  .rv, .line-mask > span { opacity: 1 !important; transform: none !important; transition: none !important; }
  * { animation-duration: 0.01s !important; animation-iteration-count: 1 !important; }
}

/* ─── Placeholder imagerie (rayures subtiles) ─── */
.ph-stripes {
  background: repeating-linear-gradient(135deg, var(--paper-lo) 0px, var(--paper-lo) 6px, var(--paper-hi) 6px, var(--paper-hi) 12px);
  border: 0.75px solid var(--paper-edge);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-muted);
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase;
  text-align: center;
}