/* ==========================================================
   AIDEX - Feuille de style principale
   ========================================================== */

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

:root {
    --bleu-fonce: #1e3a8a;
    --bleu-clair: #3b82f6;
    --bleu-tres-clair: #dbeafe;
    --blanc: #ffffff;
    --gris-clair: #f4f6fa;
    --gris-texte: #4b5563;
    --gris-fonce: #1f2937;
    --succes: #10b981;
    --alerte: #f59e0b;
    --danger: #dc2626;
    --ombre-douce: 0 2px 12px rgba(0,0,0,0.06);
    --ombre-forte: 0 8px 30px rgba(30,58,138,0.15);
    --rayon: 12px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, 'Segoe UI', Roboto, sans-serif;
    background: var(--blanc);
    color: var(--gris-fonce);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--bleu-clair); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--bleu-fonce); }
img { max-width: 100%; display: block; }

h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; color: var(--bleu-fonce); }
h1 { font-size: 3rem; margin-bottom: 1.5rem; }
h2 { font-size: 2.25rem; margin-bottom: 1rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
p { font-size: 1.1rem; color: var(--gris-texte); margin-bottom: 1rem; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

header {
    background: var(--blanc);
    box-shadow: 0 2px 20px rgba(0,0,0,0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav { display: flex; justify-content: space-between; align-items: center; padding: 1rem 0; position: relative; }
.nav-logo { height: 48px; }
.nav-menu { display: flex; list-style: none; gap: 2rem; align-items: center; }
.nav-menu a { color: var(--gris-fonce); font-weight: 500; font-size: 1rem; padding: 0.5rem 0; position: relative; }
.nav-menu a:hover { color: var(--bleu-clair); }
.nav-menu a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--bleu-clair); transition: width 0.3s; }
.nav-menu a:hover::after { width: 100%; }
.nav-cta { background: var(--bleu-clair); color: var(--blanc) !important; padding: 0.6rem 1.5rem !important; border-radius: 8px; font-weight: 600 !important; }
.nav-cta:hover { background: var(--bleu-fonce); color: var(--blanc) !important; }

.hero { padding: 6rem 0; background: linear-gradient(135deg, #f8fafc 0%, #dbeafe 100%); text-align: center; }
.hero h1 { font-size: 3.5rem; max-width: 900px; margin: 0 auto 1.5rem; background: linear-gradient(135deg, var(--bleu-fonce), var(--bleu-clair)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 1.35rem; max-width: 700px; margin: 0 auto 2.5rem; color: var(--gris-texte); }
.hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.btn { display: inline-block; padding: 1rem 2rem; border-radius: 10px; font-weight: 600; font-size: 1.05rem; cursor: pointer; border: none; transition: all 0.2s; text-align: center; }
.btn-primary { background: var(--bleu-clair); color: var(--blanc); box-shadow: 0 4px 14px rgba(59,130,246,0.4); }
.btn-primary:hover { background: var(--bleu-fonce); color: var(--blanc); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(30,58,138,0.4); }
.btn-secondary { background: var(--blanc); color: var(--bleu-fonce); border: 2px solid var(--bleu-fonce); }
.btn-secondary:hover { background: var(--bleu-fonce); color: var(--blanc); }

section { padding: 5rem 0; }
.section-title { text-align: center; margin-bottom: 3rem; }
.section-title h2 { font-size: 2.5rem; margin-bottom: 0.75rem; }
.section-title p { font-size: 1.15rem; color: var(--gris-texte); max-width: 700px; margin: 0 auto; }

.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; margin-top: 3rem; }
.card { background: var(--blanc); padding: 2.5rem 2rem; border-radius: var(--rayon); box-shadow: var(--ombre-douce); transition: transform 0.3s, box-shadow 0.3s; border-top: 4px solid var(--bleu-clair); }
.card:hover { transform: translateY(-6px); box-shadow: var(--ombre-forte); }
.card-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.card h3 { color: var(--bleu-fonce); margin-bottom: 0.75rem; }
.card p { font-size: 1rem; color: var(--gris-texte); }

.tarifs-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; margin-top: 3rem; }
.tarif-card { background: var(--blanc); padding: 2.5rem 2rem; border-radius: var(--rayon); box-shadow: var(--ombre-douce); text-align: center; border: 2px solid #e5e7eb; transition: all 0.3s; position: relative; }
.tarif-card:hover { border-color: var(--bleu-clair); box-shadow: var(--ombre-forte); transform: translateY(-4px); }
.tarif-card.populaire { border-color: var(--bleu-clair); border-width: 3px; transform: scale(1.05); box-shadow: var(--ombre-forte); }
.tarif-badge { position: absolute; top: -14px; left: 50%; transform: translateX(-50%); background: var(--bleu-clair); color: var(--blanc); padding: 0.4rem 1.2rem; border-radius: 20px; font-size: 0.85rem; font-weight: 600; letter-spacing: 0.5px; }
.tarif-card h3 { font-size: 1.75rem; margin-bottom: 0.5rem; }
.tarif-card .prix { font-size: 3rem; font-weight: 700; color: var(--bleu-fonce); margin: 1rem 0 0.5rem; }
.tarif-card .prix small { font-size: 1rem; color: var(--gris-texte); font-weight: 400; }
.tarif-card .ttc { color: var(--gris-texte); font-size: 0.95rem; margin-bottom: 2rem; }
.tarif-features { list-style: none; text-align: left; margin: 2rem 0; }
.tarif-features li { padding: 0.6rem 0; color: var(--gris-texte); font-size: 0.95rem; border-bottom: 1px solid #f3f4f6; }
.tarif-features li::before { content: '✅'; margin-right: 0.5rem; }

footer { background: var(--gris-fonce); color: #d1d5db; padding: 3rem 0 1.5rem; margin-top: 4rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; margin-bottom: 2rem; }
.footer-col h4 { color: var(--blanc); margin-bottom: 1rem; font-size: 1.1rem; }
.footer-col ul { list-style: none; }
.footer-col ul li { padding: 0.35rem 0; }
.footer-col a { color: #d1d5db; font-size: 0.95rem; }
.footer-col a:hover { color: var(--blanc); }
.footer-bottom { border-top: 1px solid #374151; padding-top: 1.5rem; text-align: center; color: #9ca3af; font-size: 0.9rem; }

.form-container { max-width: 600px; margin: 3rem auto; background: var(--blanc); padding: 2.5rem; border-radius: var(--rayon); box-shadow: var(--ombre-douce); }
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-weight: 600; margin-bottom: 0.5rem; color: var(--gris-fonce); }
.form-group input, .form-group textarea, .form-group select { width: 100%; padding: 0.85rem 1rem; border: 1px solid #e5e7eb; border-radius: 8px; font-size: 1rem; font-family: inherit; transition: border-color 0.2s; }
.form-group input:focus, .form-group textarea:focus, .form-group select:focus { outline: none; border-color: var(--bleu-clair); box-shadow: 0 0 0 3px rgba(59,130,246,0.1); }
.form-group textarea { min-height: 140px; resize: vertical; }

/* ==========================================================
   RESPONSIVE (Mobiles et tablettes)
   ========================================================== */
@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    .hero h1 { font-size: 2.5rem; }
    .hero p { font-size: 1.1rem; }
    .hero { padding: 4rem 0; }
    section { padding: 3rem 0; }
    .tarif-card.populaire { transform: scale(1); }

    /* Bouton Hamburger */
    .hamburger {
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        width: 30px;
        height: 25px;
        background: transparent;
        border: none;
        cursor: pointer;
        z-index: 1001;
    }
    .hamburger span {
        width: 100%;
        height: 3px;
        background-color: var(--bleu-fonce);
        border-radius: 10px;
        transition: all 0.3s linear;
        transform-origin: 1px;
    }

    /* Menu Mobile (caché par défaut) */
    .nav-menu {
        display: none; 
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--blanc);
        padding: 1rem 0;
        box-shadow: 0 10px 15px rgba(0,0,0,0.05);
        gap: 1rem;
    }

    /* Menu Mobile (ouvert) */
    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        width: 100%;
        text-align: center;
    }
}

/* Cacher le hamburger sur ordinateur */
@media (min-width: 769px) {
    .hamburger { display: none; }
}