/* =============================================================
   KOPA — Styles de la vitrine
   Palette KOPA :
     --orange        #F97316  (principal, énergie, CTA)
     --nuit          #0F172A  (bleu nuit : textes, éléments sérieux)
     --blanc         #FFFFFF  (arrière-plan)
     --orange-clair  #FDBA74  (secondaire, succès)
   ============================================================= */

:root {
    --orange: #F97316;
    --nuit: #0F172A;
    --blanc: #FFFFFF;
    --orange-clair: #FDBA74;

    --nuit-doux: #1E293B;
    --gris-texte: #475569;
    --fond-alterne: #FFF7ED;
    --rayon: 16px;
    --ombre: 0 10px 30px rgba(15, 23, 42, 0.08);
}

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

body {
    font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
    background: var(--blanc);
    color: var(--nuit);
    line-height: 1.6;
}

.conteneur { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------------- Boutons ---------------- */
.bouton {
    display: inline-block;
    padding: 12px 26px;
    border: none;
    border-radius: 999px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.bouton:hover { transform: translateY(-2px); }
.bouton-principal {
    background: var(--orange);
    color: var(--blanc);
    box-shadow: 0 6px 18px rgba(249, 115, 22, 0.35);
}
.bouton-principal:hover { background: #EA6A0C; }
.bouton-secondaire {
    background: transparent;
    color: var(--nuit);
    border: 2px solid var(--nuit);
}
.bouton-secondaire:hover { background: var(--nuit); color: var(--blanc); }
.bouton-grand { padding: 16px 40px; font-size: 1.1rem; }

/* ---------------- Entête ---------------- */
.entete {
    position: sticky; top: 0; z-index: 10;
    background: var(--nuit);
    box-shadow: var(--ombre);
}
.entete-bande {
    display: flex; align-items: center; gap: 28px;
    padding-top: 12px; padding-bottom: 12px;
}
.entete-marque { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.entete-logo { width: 40px; height: 40px; border-radius: 50%; }
.entete-nom { color: var(--blanc); font-weight: 700; font-size: 1.25rem; letter-spacing: 0.5px; }
.entete-nav { display: flex; gap: 22px; flex: 1; }
.entete-nav a { color: var(--orange-clair); text-decoration: none; font-weight: 500; }
.entete-nav a:hover { color: var(--blanc); }

/* ---------------- Hero ---------------- */
.hero {
    background: linear-gradient(160deg, var(--nuit) 0%, #1E293B 55%, #B45309 130%);
    color: var(--blanc);
    text-align: center;
    padding: 90px 24px 100px;
}
.hero-logo {
    width: 110px; height: 110px; border-radius: 50%;
    box-shadow: 0 0 0 6px rgba(249, 115, 22, 0.35), 0 18px 40px rgba(0, 0, 0, 0.35);
    margin-bottom: 28px;
}
.hero-titre {
    font-size: 3.2rem; font-weight: 800; letter-spacing: 2px;
    color: var(--orange);
}
.hero-slogan {
    font-size: 1.5rem; font-weight: 600; margin-top: 6px;
    color: var(--orange-clair);
}
.hero-description {
    max-width: 640px; margin: 22px auto 0; font-size: 1.08rem;
    color: #CBD5E1;
}
.hero-actions { margin-top: 34px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------------- Sections ---------------- */
.section { padding: 84px 24px; }
.section-alternee { background: var(--fond-alterne); }
.section-titre { text-align: center; font-size: 2.1rem; font-weight: 800; margin-bottom: 12px; }
.section-sous-titre { text-align: center; color: var(--gris-texte); margin-bottom: 46px; }

/* ---------------- Fonctionnalités ---------------- */
.grille-fonctionnalites {
    display: grid; gap: 22px;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.carte {
    background: var(--blanc);
    border: 1px solid #FDE4CE;
    border-radius: var(--rayon);
    padding: 30px 26px;
    box-shadow: var(--ombre);
    transition: transform 0.15s ease;
}
.carte:hover { transform: translateY(-4px); }
.carte-icone { font-size: 2.2rem; }
.carte-titre { margin: 14px 0 8px; font-size: 1.15rem; }
.carte-texte { color: var(--gris-texte); font-size: 0.97rem; }

/* ---------------- Étapes ---------------- */
.grille-etapes {
    list-style: none; display: grid; gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    counter-reset: etape;
}
.etape {
    display: flex; gap: 16px; align-items: flex-start;
    background: var(--blanc);
    border-radius: var(--rayon);
    padding: 24px 20px;
    box-shadow: var(--ombre);
}
.etape-numero {
    flex: 0 0 46px; height: 46px;
    display: flex; align-items: center; justify-content: center;
    background: var(--orange);
    color: var(--blanc);
    border-radius: 50%;
    font-size: 1.25rem; font-weight: 700;
}
.etape-titre { font-size: 1.05rem; margin-bottom: 4px; }
.etape-texte { color: var(--gris-texte); font-size: 0.95rem; }

/* ---------------- Stats ---------------- */
.grille-stats {
    display: grid; gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    text-align: center;
}
.stat {
    background: var(--nuit);
    color: var(--blanc);
    border-radius: var(--rayon);
    padding: 30px 18px;
    box-shadow: var(--ombre);
}
.stat-valeur { display: block; font-size: 2.4rem; font-weight: 800; color: var(--orange-clair); }
.stat-libelle { color: #CBD5E1; font-size: 0.95rem; }

/* ---------------- CTA ---------------- */
.bandeau-cta {
    background: linear-gradient(135deg, var(--orange) 0%, #EA6A0C 100%);
    color: var(--blanc);
    text-align: center;
    border-radius: 22px;
    padding: 56px 30px;
    box-shadow: 0 18px 40px rgba(249, 115, 22, 0.35);
}
.bandeau-cta-titre { font-size: 2rem; font-weight: 800; }
.bandeau-cta-texte { margin: 12px 0 26px; font-size: 1.08rem; }
.bandeau-cta .bouton-principal { background: var(--nuit); box-shadow: none; }
.bandeau-cta .bouton-principal:hover { background: #1E293B; }
.bandeau-cta-sous-texte { margin-top: 14px; font-size: 0.9rem; opacity: 0.9; }

/* ---------------- Pied de page ---------------- */
.pied { background: var(--nuit); color: #CBD5E1; padding: 46px 24px; }
.pied-bande { text-align: center; }
.pied-logo { width: 52px; height: 52px; border-radius: 50%; margin-bottom: 14px; }
.pied-description { max-width: 480px; margin: 0 auto 10px; }
.pied-droits { font-size: 0.85rem; color: #94A3B8; }

/* ---------------- 404 ---------------- */
.page-404 { display: flex; min-height: 100vh; align-items: center; justify-content: center; }
.bloc-404 { text-align: center; padding: 40px; }
.logo-404 { width: 90px; height: 90px; border-radius: 50%; margin-bottom: 18px; }
.bloc-404 h1 { font-size: 4rem; color: var(--orange); }
.bloc-404 p { margin: 10px 0 26px; color: var(--gris-texte); }

/* ---------------- Responsive ---------------- */
@media (max-width: 640px) {
    .entete-nav { display: none; }
    .hero-titre { font-size: 2.4rem; }
    .hero-slogan { font-size: 1.2rem; }
    .hero-logo { width: 90px; height: 90px; }
    .section { padding: 60px 24px; }
    .section-titre { font-size: 1.7rem; }
}