@charset "UTF-8";
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* Skip navigation - accessibilité clavier */
.skip-nav {
  position: absolute; left: -9999px; top: auto; width: 1px; height: 1px;
  overflow: hidden; z-index: 9999;
}
.skip-nav:focus {
  position: fixed; left: 1rem; top: 0; width: auto; height: auto;
  overflow: visible; background: #3b82f6; color: #fff; padding: 0.65rem 1.25rem;
  border-radius: 0 0 0.5rem 0.5rem; font-weight: 700; font-size: 0.9rem;
  text-decoration: none;
}

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

/* ══════════════════════════════
   FOND
══════════════════════════════ */
body {
  min-height: 100vh;
  background: #07111f;
  color: #f8fafc;
  font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
  overflow-x: hidden;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  width: 650px; height: 650px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59,130,246,0.15) 0%, transparent 70%);
  filter: blur(65px);
  top: -200px; left: -200px;
  animation: drift 14s ease-in-out infinite alternate;
  pointer-events: none; z-index: 0;
}
body::after {
  content: '';
  position: fixed;
  width: 550px; height: 550px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139,92,246,0.11) 0%, transparent 70%);
  filter: blur(75px);
  bottom: -180px; right: -180px;
  animation: drift 14s ease-in-out infinite alternate-reverse;
  pointer-events: none; z-index: 0;
}
@keyframes drift {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(55px,40px) scale(1.1); }
}

/* ══════════════════════════════
   TOPNAV
══════════════════════════════ */
/* .topnav, .topnav-brand/-logo/-links/-download/-hamburger : voir css/topnav.css (partagé) */
.topnav-cta { background: linear-gradient(135deg,#3b82f6,#6366f1) !important; color: #fff !important; font-weight: 700 !important; box-shadow: 0 2px 12px rgba(59,130,246,0.3) !important; border: none !important; }
.topnav-cta:hover { filter: brightness(1.08) !important; transform: translateY(-1px); }


/* ══════════════════════════════
   PAGE
══════════════════════════════ */
.page {
  max-width: 108rem;
  margin: 0 auto;
  padding: 5.5rem 1.5rem 1.5rem;
  text-align: center;
  position: relative;
  z-index: 1;
}

/* ══════════════════════════════
   HERO LOGO
══════════════════════════════ */
.hero-logo {
  text-align: center;
  margin: 0 0 1.5rem;
}
.hero-logo img {
  width: 100px; height: 100px;
  object-fit: contain;
  filter: drop-shadow(0 0 24px rgba(59,130,246,0.55)) brightness(1.15);
  animation: float 5s ease-in-out infinite;
  border-radius: 50%;
  overflow: hidden;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-9px); }
}

h1 {
  font-size: 3.3rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  margin-bottom: 0.75rem;
  color: #f8fafc;
  animation: fadeUp 0.6s cubic-bezier(.22,1,.36,1) both;
}
.hero-title-grad {
  background: linear-gradient(270deg, #93c5fd 0%, #a78bfa 25%, #f472b6 50%, #a78bfa 75%, #93c5fd 100%);
  background-size: 300% 300%;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: heroGradShift 5s ease infinite;
  display: inline-block;
}
@keyframes heroGradShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.subtitle {
  color: #f1f5f9;
  font-size: 0.95rem;
  margin-bottom: 3rem;
  line-height: 1.7;
  animation: fadeUp 0.6s 0.08s cubic-bezier(.22,1,.36,1) both;
}

/* ══════════════════════════════
   OS CARDS
══════════════════════════════ */
.os-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
  align-items: stretch;
}
@media (max-width: 640px) {
  .os-grid { grid-template-columns: 1fr; }
}

/* ══════════════════════════════
   RESPONSIVE — MOBILE
══════════════════════════════ */
/* Media query mobile .topnav-hamburger/.topnav-links : voir css/topnav.css (partagé) */

@media (max-width: 520px) {
  h1 { font-size: 1.85rem; }
  .page { padding: 5.5rem 1rem 4rem; }
  .install-steps { padding: 1.25rem; }
  .info-box { padding: 1rem 1.1rem; }
}

@media (max-width: 380px) {
  h1 { font-size: 1.6rem; }
}

/* ── PREFERS-REDUCED-MOTION ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.os-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 1.5rem;
  padding: 2rem 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  backdrop-filter: blur(16px);
  transition: border-color 0.25s, background 0.25s, transform 0.3s cubic-bezier(.34,1.56,.64,1), box-shadow 0.25s;
  position: relative;
  overflow: hidden;
}
.os-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  border-radius: 1.5rem 1.5rem 0 0;
  opacity: 0.8;
}
/* Entrée échelonnée des cartes */
.os-card:nth-child(1) { animation: fadeUp 0.55s 0.10s cubic-bezier(.22,1,.36,1) both; justify-content: center; }
.os-card:nth-child(2) { animation: fadeUp 0.55s 0.20s cubic-bezier(.22,1,.36,1) both; }
.os-card:nth-child(3) { animation: fadeUp 0.55s 0.30s cubic-bezier(.22,1,.36,1) both; }

/* Windows — accent multicolor animé */
.os-card:nth-child(1)::before {
  background: linear-gradient(90deg, #f25022, #ffb900, #7fba00, #00a4ef, #f25022);
  background-size: 300% auto;
  animation: accentSheen 4s linear infinite;
}
.os-card:nth-child(1) { border-color: rgba(0,164,239,0.18); }
.os-card:nth-child(1):hover {
  border-color: rgba(0,164,239,0.35);
  background: rgba(0,164,239,0.05);
  box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(0,164,239,0.15);
}
/* macOS — accent argent animé */
.os-card:nth-child(2)::before {
  background: linear-gradient(90deg, #636366, #e0e0e2, #636366, #aeaeb2);
  background-size: 300% auto;
  animation: accentSheen 5s linear infinite;
}
.os-card:nth-child(2) { border-color: rgba(174,174,178,0.15); }
.os-card:nth-child(2):hover {
  border-color: rgba(174,174,178,0.3);
  background: rgba(174,174,178,0.04);
  box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(174,174,178,0.12);
}
/* Linux — accent orange animé */
.os-card:nth-child(3)::before {
  background: linear-gradient(90deg, #ea580c, #fbbf24, #fb923c, #ea580c);
  background-size: 300% auto;
  animation: accentSheen 4.5s linear infinite;
}
.os-card:nth-child(3) { border-color: rgba(249,115,22,0.18); }
.os-card:nth-child(3):hover {
  border-color: rgba(249,115,22,0.35);
  background: rgba(249,115,22,0.05);
  box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(249,115,22,0.15);
}

@keyframes accentSheen {
  from { background-position: 0% center; }
  to   { background-position: 300% center; }
}

.os-card:hover { transform: translateY(-6px); }
.os-card:hover .os-icon {
  transform: scale(1.1) translateY(-3px);
  transition: transform 0.35s cubic-bezier(.34,1.56,.64,1);
}
.os-icon { transition: transform 0.3s ease; }

.os-icon {
  font-size: 2.5rem;
  line-height: 1;
  width: 4.5rem;
  height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.1rem;
  border-radius: 1.1rem;
  position: relative;
}
.os-card:nth-child(1) .os-icon {
  background: rgba(0,120,212,0.1);
  box-shadow: 0 0 20px rgba(0,164,239,0.15), inset 0 1px 0 rgba(255,255,255,0.06);
}
.os-card:nth-child(2) .os-icon {
  background: rgba(174,174,178,0.07);
  box-shadow: 0 0 20px rgba(174,174,178,0.1), inset 0 1px 0 rgba(255,255,255,0.06);
}
.os-card:nth-child(3) .os-icon {
  background: rgba(249,115,22,0.1);
  box-shadow: 0 0 20px rgba(249,115,22,0.15), inset 0 1px 0 rgba(255,255,255,0.06);
}

.os-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: #f1f5f9;
  letter-spacing: -0.01em;
}

.os-format {
  display: inline-block;
  font-size: 0.68rem;
  color: #f1f5f9;
  font-family: 'Consolas', monospace;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 2rem;
  padding: 0.18rem 0.65rem;
  letter-spacing: 0.02em;
}

/* Bouton téléchargement */
.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.8rem 1rem;
  background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
  color: white;
  text-decoration: none;
  border-radius: 0.875rem;
  font-weight: 700;
  font-size: 0.875rem;
  margin-top: 0.25rem;
  box-shadow: 0 4px 20px rgba(59,130,246,0.35), inset 0 1px 0 rgba(255,255,255,0.18);
  transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
  position: relative;
  overflow: hidden;
  letter-spacing: -0.01em;
}
/* reflet haut permanent */
.btn-download::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.12) 0%, transparent 55%);
  pointer-events: none;
}
/* shimmer au survol */
.btn-download::before {
  content: '';
  position: absolute;
  top: 0; left: -80%;
  width: 55%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.22), transparent);
  transform: skewX(-18deg);
  transition: left 0.55s ease;
  pointer-events: none;
}
.btn-download:hover::before { left: 140%; }
.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(99,102,241,0.5), inset 0 1px 0 rgba(255,255,255,0.18);
  filter: brightness(1.1);
}
.btn-download.unavailable {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.07);
  color: #f1f5f9;
  box-shadow: none;
  cursor: not-allowed;
  pointer-events: none;
  inset: none;
}

/* ══════════════════════════════
   INFO BOX
══════════════════════════════ */
.info-box {
  background: rgba(59,130,246,0.07);
  border: 1px solid rgba(59,130,246,0.18);
  border-radius: 1rem;
  padding: 1.3rem 1.6rem;
  font-size: 0.875rem;
  color: #93c5fd;
  line-height: 1.75;
  text-align: left;
  margin-bottom: 2rem;
  animation: fadeUp 0.6s 0.2s cubic-bezier(.22,1,.36,1) both;
}
.info-box strong { color: #bfdbfe; }
.info-box a { color: #60a5fa; text-decoration: none; }
.info-box a:hover { color: #93c5fd; }

/* ══════════════════════════════
   ÉTAPES D'INSTALLATION
══════════════════════════════ */
.install-steps {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 1rem;
  padding: 1.75rem;
  text-align: left;
  backdrop-filter: blur(8px);
  animation: fadeUp 0.6s 0.26s cubic-bezier(.22,1,.36,1) both;
}

.install-steps h3 {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #3b82f6;
  margin-bottom: 1.25rem;
}

.step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  color: #f1f5f9;
  line-height: 1.65;
}
.step:last-child { margin-bottom: 0; }

.step-num {
  background: linear-gradient(135deg, #3b82f6, #6366f1);
  color: white;
  font-size: 0.7rem;
  font-weight: 800;
  min-width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.1rem;
  box-shadow: 0 2px 8px rgba(59,130,246,0.35);
}

.step strong { color: #e2e8f0; }
.step a { color: #60a5fa; text-decoration: none; }
.step a:hover { color: #93c5fd; }

.version-note {
  font-size: 0.72rem;
  color: #f1f5f9;
  margin-top: 2.5rem;
  animation: fadeUp 0.6s 0.32s cubic-bezier(.22,1,.36,1) both;
}


/* ── AMÉLIORATIONS VISUELLES ── */
/* Dot grid */
body::before {
  background-image: radial-gradient(rgba(59,130,246,0.07) 1px, transparent 1px),
    radial-gradient(circle, rgba(59,130,246,0.12) 0%, transparent 65%);
  background-size: 36px 36px, 700px 700px;
  background-position: 0 0, -200px -200px;
}


/* OS card hover plus riche */
.os-card {
  background: rgba(13,24,41,0.7);
}
.os-card:hover {
  transform: translateY(-8px) scale(1.01);
}

/* Info box améliorée */
.info-box {
  background: rgba(59,130,246,0.06) !important;
  border: 1px solid rgba(59,130,246,0.18) !important;
  border-radius: 1rem !important;
  position: relative; overflow: hidden;
}
.info-box::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, #3b82f6, #6366f1);
}

/* Install steps */
.install-steps {
  background: rgba(13,24,41,0.8) !important;
  border: 1px solid rgba(255,255,255,0.08) !important;
  border-radius: 1rem !important;
}

/* ── FIX body::before (grille dans cercle flou = bug) ── */
body::before {
  background: radial-gradient(circle, rgba(59,130,246,0.15) 0%, transparent 70%);
  background-size: auto;
  background-position: 0 0;
}
/* Grille directement sur body (derrière les pseudo-éléments) */
body {
  background-color: #07111f;
  background-image: radial-gradient(rgba(59,130,246,0.065) 1px, transparent 1px);
  background-size: 36px 36px;
}

/* Sous-titre amélioré */
.subtitle {
  font-size: 1rem !important;
  color: #f1f5f9 !important;
  line-height: 1.75 !important;
  max-width: 960px;
  margin-left: auto; margin-right: auto;
}
.subtitle strong { color: #e2e8f0; }

/* Ligne "Disponible sur…" */
.page > p,
.page .sub-note,
p.sub-note {
  font-size: 0.85rem;
  color: #f1f5f9;
  line-height: 1.65;
}

/* Accentuation des mots clés plateforme */
.subtitle .win  { color: #60a5fa; font-weight: 600; }
.subtitle .mac  { color: #a3a3a3; font-weight: 600; }
.subtitle .lnx  { color: #fb923c; font-weight: 600; }