/* Delo — site vitrine. Aucune ressource externe : polices système, pas de
   framework. La palette reprend celle de l'application (slate + bleu nuit). */

:root {
  --blue-950: #172554;
  --blue-900: #1e3a8a;
  --blue-800: #1e40af;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-900: #0f172a;
  --mono: ui-monospace, "Cascadia Mono", "Segoe UI Mono", Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--slate-900);
  background: var(--slate-50);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 68rem; margin: 0 auto; padding: 0 1.5rem; }

.mono { font-family: var(--mono); font-size: 0.9em; word-break: break-all; }

h1, h2, h3 { line-height: 1.2; }
h2 { font-size: 1.9rem; font-weight: 650; letter-spacing: -0.015em; }

a { color: var(--blue-800); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

/* ---------- Marque ---------- */

.brand-altekk {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--blue-900);
}
.brand-delo { font-size: 1.5rem; font-weight: 650; color: var(--slate-900); }
.brand-row { display: flex; align-items: center; gap: 0.65rem; }
.brand-mark { display: block; height: 44px; width: auto; }
.brand-delo-sm { font-size: 1.15rem; font-weight: 650; }

/* ---------- Boutons ---------- */

.btn {
  display: inline-block;
  padding: 0.65rem 1.3rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease;
}
.btn-primary { background: var(--blue-900); color: #fff; }
.btn-primary:hover { background: var(--blue-800); }
.btn-outline {
  border-color: var(--slate-200);
  color: var(--slate-900);
  background: #fff;
}
.btn-outline:hover { border-color: var(--blue-900); color: var(--blue-900); }

/* ---------- En-tête ---------- */

.site-header {
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--slate-200);
  position: sticky;
  top: 0;
  z-index: 10;
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.8rem;
  padding-bottom: 0.8rem;
}
.nav { display: flex; align-items: center; gap: 1.4rem; flex-wrap: wrap; }
.nav a {
  color: var(--slate-600);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}
.nav a:hover { color: var(--blue-900); }
.nav .btn { color: var(--slate-900); }

/* ---------- Héro ---------- */

.hero { padding: 5rem 0 4.5rem; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}
.kicker {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--blue-900);
  margin-bottom: 0.9rem;
}
.hero h1 {
  font-size: 2.7rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.lede {
  margin-top: 1.2rem;
  font-size: 1.13rem;
  color: var(--slate-600);
}
.hero-actions { margin-top: 2rem; display: flex; gap: 0.9rem; flex-wrap: wrap; }

/* Le même échange, vu des deux côtés */
.hero-demo { display: grid; gap: 1rem; }
.demo-card {
  border-radius: 0.75rem;
  padding: 1.1rem 1.25rem;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}
.demo-clear { background: #fff; border: 1px solid var(--slate-200); }
.demo-cipher { background: var(--blue-950); color: var(--slate-400); }
.demo-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.7rem;
}
.demo-clear .demo-title { color: var(--slate-500); }
.demo-cipher .demo-title { color: #93c5fd; }
.demo-msg { font-size: 0.92rem; }
.demo-author { font-weight: 600; font-size: 0.8rem; margin-bottom: 0.2rem; }
.demo-clear .demo-author { color: var(--blue-900); }
.demo-doc {
  margin-top: 0.8rem;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  font-size: 0.85rem;
}
.demo-clear .demo-doc { background: var(--slate-100); color: var(--slate-700); }
.demo-cipher .demo-doc { background: rgba(148, 163, 184, 0.12); }

/* ---------- Piliers ---------- */

.pillars { padding: 3.5rem 0; background: #fff; border-block: 1px solid var(--slate-200); }
.three-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
.pillar h3 { font-size: 1.1rem; margin-bottom: 0.6rem; color: var(--blue-900); }
.pillar p { color: var(--slate-600); font-size: 0.97rem; }

/* ---------- Fonctionnalités ---------- */

.features { padding: 4.5rem 0; }
.feature-grid {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}
.feature {
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: 0.75rem;
  padding: 1.4rem 1.5rem;
}
.feature h3 { font-size: 1.02rem; margin-bottom: 0.5rem; }
.feature p { color: var(--slate-600); font-size: 0.93rem; }

/* ---------- Transparence ---------- */

.transparency { padding: 4.5rem 0; background: #fff; border-block: 1px solid var(--slate-200); }
.section-lede { margin-top: 0.9rem; max-width: 44rem; color: var(--slate-600); font-size: 1.05rem; }
.two-cols {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
}
.panel {
  border: 1px solid var(--slate-200);
  border-radius: 0.75rem;
  padding: 1.6rem 1.7rem;
}
.panel h3 { font-size: 1.05rem; margin-bottom: 0.9rem; }
.panel ul { list-style: none; }
.panel li {
  padding: 0.45rem 0 0.45rem 1.5rem;
  position: relative;
  font-size: 0.95rem;
  color: var(--slate-600);
}
.panel li::before { position: absolute; left: 0; }
.panel-dark { background: var(--blue-950); border-color: var(--blue-950); }
.panel-dark h3 { color: #fff; }
.panel-dark li { color: #bfdbfe; }
.panel-dark li::before { content: "🔒"; font-size: 0.8rem; }
.panel:not(.panel-dark) li::before { content: "—"; color: var(--slate-400); }
.transparency-note {
  margin-top: 1.6rem;
  color: var(--slate-500);
  font-size: 0.92rem;
  max-width: 44rem;
}

/* ---------- Tarifs ---------- */

.pricing { padding: 4.5rem 0; }
.pricing-grid {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  align-items: stretch;
}
.price-card {
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: 0.75rem;
  padding: 1.7rem 1.6rem;
}
.price-featured { border: 2px solid var(--blue-900); position: relative; }
.price-card h3 { font-size: 1.1rem; }
.price-target { color: var(--slate-500); font-size: 0.88rem; margin-top: 0.15rem; }
.price { margin-top: 1.1rem; color: var(--slate-600); font-size: 0.9rem; }
.price-amount {
  font-size: 2rem;
  font-weight: 700;
  color: var(--slate-900);
  letter-spacing: -0.02em;
}
.price-card ul { list-style: none; margin-top: 1.2rem; }
.price-card li {
  padding: 0.35rem 0 0.35rem 1.4rem;
  position: relative;
  font-size: 0.92rem;
  color: var(--slate-600);
}
.price-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--blue-900);
  font-weight: 700;
}
.soon {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--slate-500);
  background: var(--slate-100);
  border-radius: 0.5rem;
  padding: 0.1rem 0.45rem;
  vertical-align: 0.1em;
}
.pricing-note {
  margin-top: 1.6rem;
  color: var(--slate-500);
  font-size: 0.92rem;
  max-width: 44rem;
}

/* ---------- Démarrer ---------- */

.start { padding: 4.5rem 0; }
.steps {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
  list-style: none;
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: 0.75rem;
  padding: 1.5rem 1.6rem;
}
.steps li::before {
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  background: var(--blue-900);
  color: #fff;
  font-weight: 650;
  font-size: 0.9rem;
  margin-bottom: 0.9rem;
}
.steps h3 { font-size: 1.02rem; margin-bottom: 0.5rem; }
.steps p { color: var(--slate-600); font-size: 0.93rem; }
.start-cta { margin-top: 2.4rem; text-align: center; }
.start-note { margin-top: 0.7rem; color: var(--slate-500); font-size: 0.9rem; }

/* ---------- Accès ---------- */

.access { padding: 0 0 4.5rem; }
.access-box {
  background: var(--blue-950);
  border-radius: 1rem;
  padding: 3rem 2.5rem;
  color: #fff;
  text-align: center;
}
.access-box h2 { color: #fff; }
.access-box > p { margin-top: 0.7rem; color: #bfdbfe; }
.access-row {
  margin-top: 1.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: center;
}
.access-row input {
  font: inherit;
  font-family: var(--mono);
  padding: 0.6rem 0.9rem;
  border-radius: 0.5rem;
  border: 1px solid var(--blue-800);
  background: var(--blue-900);
  color: #fff;
  width: 13rem;
}
.access-row input::placeholder { color: #93a6d8; }
.access-row input:focus { outline: 2px solid #93c5fd; outline-offset: 1px; }
.access-suffix { font-family: var(--mono); color: #93c5fd; font-size: 0.95rem; }
.access-row .btn-primary { background: #fff; color: var(--blue-950); }
.access-row .btn-primary:hover { background: var(--slate-100); }
.access-hint { margin-top: 1.1rem; font-size: 0.85rem; color: #93a6d8; }

/* ---------- Pied de page ---------- */

.site-footer {
  border-top: 1px solid var(--slate-200);
  padding: 2.5rem 0 3rem;
  background: #fff;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.4fr;
  gap: 2rem;
  font-size: 0.9rem;
  color: var(--slate-600);
}
.footer-fine { font-size: 0.8rem; color: var(--slate-500); }
.footer-fine p + p { margin-top: 0.5rem; }

/* ---------- Écrans étroits ---------- */

@media (max-width: 56rem) {
  .hero { padding-top: 3rem; }
  .hero h1 { font-size: 2.1rem; }
  .hero-grid, .three-cols, .feature-grid, .two-cols, .steps, .footer-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  /* En-tête : ne garder que le bouton d'accès, les ancres s'empilaient. */
  .nav a:not(.btn) { display: none; }
  .access-box { padding: 2.2rem 1.4rem; }
}