/* Nina Atelier — base styles (partagés landing/pitch/archi/app) */

:root {
  --bg: #0B0D12;
  --bg-elev: #131722;
  --bg-elev-2: #181D2B;
  --border: #232937;
  --border-strong: #2E3648;
  --text: #E6E8EC;
  --text-muted: #8A93A6;
  --text-dim: #5B6479;
  --violet: #7C3AED;
  --cyan: #06B6D4;
  --amber: #F59E0B;
  --emerald: #10B981;
  --rose: #EF4444;
  --grad: linear-gradient(135deg, #7C3AED 0%, #06B6D4 100%);
  --grad-soft: linear-gradient(135deg, rgba(124,58,237,0.16) 0%, rgba(6,182,212,0.16) 100%);
  --glow-violet: 0 20px 60px -30px rgba(124,58,237,0.55);
  --glow-cyan: 0 20px 60px -30px rgba(6,182,212,0.55);
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-1: 0 1px 0 rgba(255,255,255,0.03) inset, 0 12px 32px -20px rgba(0,0,0,0.6);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'JetBrains Mono', Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(ellipse at 15% -5%, rgba(124,58,237,0.14), transparent 55%),
    radial-gradient(ellipse at 85% 8%, rgba(6,182,212,0.10), transparent 55%),
    radial-gradient(ellipse at 50% 100%, rgba(124,58,237,0.06), transparent 50%),
    var(--bg);
}

a { color: inherit; text-decoration: none; }

/* --- Common atoms --- */

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.wrap.narrow { max-width: 900px; }

.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.eyebrow .dot {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--grad);
  vertical-align: middle;
  margin-right: 10px;
  box-shadow: 0 0 12px rgba(124,58,237,0.7);
}

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

h1, h2, h3 { font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: clamp(36px, 5.4vw, 68px); line-height: 1.05; margin: 0; }
h2 { font-size: clamp(24px, 2.6vw, 34px); line-height: 1.2; margin: 0 0 12px; }
h3 { font-size: 18px; margin: 0 0 8px; }

p.lead {
  font-size: clamp(16px, 1.35vw, 20px);
  color: var(--text-muted);
  max-width: 62ch;
  line-height: 1.55;
  margin: 20px 0 0;
}

/* --- Buttons --- */

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  border-radius: 12px;
  font-family: inherit; font-weight: 600; font-size: 15px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  text-decoration: none;
  color: var(--text);
  background: var(--bg-elev);
  border-color: var(--border);
}
.btn:hover { transform: translateY(-1px); border-color: var(--border-strong); }
.btn .arrow { transition: transform .18s ease; }
.btn:hover .arrow { transform: translateX(3px); }

.btn.primary {
  background: var(--grad);
  color: #0B0D12;
  border-color: transparent;
  box-shadow: var(--glow-violet);
}
.btn.primary:hover { box-shadow: 0 24px 70px -25px rgba(124,58,237,0.8); }

.btn.ghost {
  background: transparent;
  border-color: var(--border-strong);
}

/* --- Card --- */

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent 60%), var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-1);
}
.card.accent {
  border-color: rgba(124,58,237,0.35);
  box-shadow: var(--glow-violet), var(--shadow-1);
}

/* --- Header (nav commun) --- */

.topnav {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(11,13,18,0.72);
  border-bottom: 1px solid var(--border);
}
.topnav .inner {
  max-width: 1200px; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; gap: 20px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-weight: 700; letter-spacing: -0.01em;
  color: var(--text);
}
.brand svg { width: 30px; height: 30px; }
.brand .sub {
  font-weight: 500; color: var(--text-muted); font-size: 14px; margin-left: 4px;
}
.brand .divider {
  width: 1px; height: 18px; background: var(--border-strong);
  margin: 0 4px;
}
.topnav .navlinks {
  margin-left: auto;
  display: flex; align-items: center; gap: 6px;
}
.topnav .navlinks a {
  padding: 8px 14px; border-radius: 10px; color: var(--text-muted); font-size: 14px;
  transition: color .15s ease, background .15s ease;
}
.topnav .navlinks a:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.topnav .navlinks a.cta {
  color: #0B0D12; background: var(--grad); font-weight: 600;
  padding: 9px 16px;
  box-shadow: var(--glow-violet);
}

/* --- Footer --- */

.foot {
  border-top: 1px solid var(--border);
  padding: 40px 0 60px;
  color: var(--text-dim);
  font-size: 13px;
  margin-top: 80px;
}
.foot .row {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  flex-wrap: wrap;
}
.foot a { color: var(--text-muted); }
.foot a:hover { color: var(--text); }

/* --- Utility --- */

.hairline {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
  margin: 60px 0;
}

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}
.chip.violet { color: #C4B5FD; border-color: rgba(124,58,237,0.35); background: rgba(124,58,237,0.10); }
.chip.cyan { color: #67E8F9; border-color: rgba(6,182,212,0.35); background: rgba(6,182,212,0.10); }
.chip.emerald { color: #6EE7B7; border-color: rgba(16,185,129,0.35); background: rgba(16,185,129,0.10); }
.chip.amber { color: #FCD34D; border-color: rgba(245,158,11,0.35); background: rgba(245,158,11,0.10); }

/* Scroll appearance */
html { scroll-behavior: smooth; }

::selection { background: rgba(124,58,237,0.55); color: #fff; }

/* ========================================================================
   Responsive — mobile ≤ 640px
   ======================================================================== */

@media (max-width: 640px) {
  .wrap { padding: 0 18px; }

  /* Nav compacte : cacher sub-brand + divider + liens secondaires */
  .topnav .inner { padding: 12px 16px; gap: 10px; }
  .topnav .brand .sub,
  .topnav .brand .divider { display: none; }
  .topnav .navlinks a:not(.cta) { display: none; }
  .topnav .navlinks a.cta {
    padding: 8px 14px;
    font-size: 13px;
  }

  /* Footer plus dense */
  .foot { padding: 28px 0 40px; margin-top: 60px; }
  .foot .row { padding: 0 18px; gap: 12px; flex-direction: column; align-items: flex-start; text-align: left; }

  /* Boutons pleine largeur pour la ligne de CTA */
  .btn { padding: 12px 18px; font-size: 14px; }
  h1 { line-height: 1.08; }
  p.lead { font-size: 15px; }
  .hairline { margin: 44px 0; }
}