/* =========================================
   1. VARIABLES GLOBALES ET RÉINITIALISATION
   ========================================= */
:root {
    --color-primary: #011F41; /* Bleu marine foncé Acuytiv */
    --color-accent: #E4C441;  /* Jaune BPI France */
    --color-text: #333333;
    --color-text-light: #555555;
    --color-bg: #FFFFFF;
    --color-bg-muted: #F4F4F4;
    --color-bg-accent: #fffdf5; /* Fond jaune très clair */
    --font-family: 'Poppins', sans-serif;
}

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

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

main {
    padding: 40px 0;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 50vh;
}

/* =========================================
   2. CLASSES UTILITAIRES GLOBALES
   ========================================= */
.bg-light { background-color: #f9f9f9; }
.content-wrapper { max-width: 1200px; margin: 0 auto; }
.flex-row { display: flex; gap: 40px; align-items: flex-start; margin-bottom: 40px; }
.flex-col { flex: 1; }
.reverse { flex-direction: row-reverse; align-items: center; }

/* =========================================
   3. EN-TÊTE ET NAVIGATION (HEADER)
   ========================================= */
header {
    background-color: var(--color-bg);
    padding: 10px 0;
    border-bottom: 1px solid #eaeaea;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo img {
    height: 80px;
    width: auto;
    display: block;
}

/* Menu Déroulant (Dropdown) */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.dropbtn {
    background-color: transparent;
    color: var(--color-primary);
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    padding: 10px 15px;
    font-family: var(--font-family);
    display: flex;
    align-items: center;
    gap: 8px;
    border-radius: 8px;
    transition: 0.3s;
}

.dropbtn:hover { background-color: rgba(0,0,0,0.05); }

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    background-color: var(--color-bg);
    min-width: 250px;
    box-shadow: 0px 8px 20px rgba(0,0,0,0.15);
    z-index: 100;
    border-radius: 8px;
    overflow: hidden;
    list-style: none;
    padding: 0;
    margin: 0;
    border: 1px solid #eee;
}

.dropdown-content li a {
    color: var(--color-primary);
    padding: 15px 20px;
    text-decoration: none;
    display: block;
    font-weight: 500;
    border-bottom: 1px solid #f5f5f5;
    transition: 0.2s;
    text-align: left;
}

.dropdown-content li a:hover {
    background-color: #f4f6f8;
    padding-left: 25px;
}

.nav-dropdown:hover .dropdown-content { display: block; }

/* =========================================
   4. PIED DE PAGE (FOOTER)
   ========================================= */
footer {
    background-color: var(--color-primary);
    color: var(--color-bg);
    padding: 40px 20px;
    width: 100%;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.footer-container p { margin-bottom: 15px; font-size: 1rem; }

.footer-nav {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    font-size: 0.9rem;
}

.footer-nav a {
    color: var(--color-bg);
    text-decoration: none;
    opacity: 0.8;
    transition: 0.3s;
}

.footer-nav a:hover {
    opacity: 1;
    color: var(--color-accent);
}

/* =========================================
   5. PAGE ACCUEIL (index.php)
   ========================================= */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    padding: 0 20px;
}

.hero { text-align: left; margin-bottom: 40px; }
.hero h1 { font-size: 2.5rem; font-weight: 700; color: var(--color-primary); margin-bottom: 20px; line-height: 1.2; }
.hero-subtext { font-size: 1.1rem; color: var(--color-text-light); margin-bottom: 30px; }
.hero-note { font-size: 0.85rem; color: var(--color-text-light); margin-top: 15px; font-style: italic; }

.boussole h2 { font-size: 1.6rem; color: var(--color-primary); margin-bottom: 25px; }

.cards-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.card { background-color: var(--color-bg); border: 1px solid #eee; border-radius: 12px; padding: 25px; transition: transform 0.3s ease; }
.card:hover { transform: translateY(-5px); box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
.card h3 { font-size: 1rem; color: var(--color-primary); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.5px; }

.parcours h2 { font-size: 1.8rem; color: var(--color-primary); margin-bottom: 30px; }
.parcours-timeline { list-style: none; position: relative; padding-left: 50px; }
.parcours-timeline::before { content: ''; position: absolute; left: 17px; top: 10px; width: 2px; height: calc(100% - 40px); background-color: var(--color-accent); }
.parcours-timeline li { position: relative; margin-bottom: 35px; }
.parcours-timeline li::before {
    position: absolute; left: -50px; top: 0; width: 36px; height: 36px;
    background-color: var(--color-accent); color: var(--color-primary);
    border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; z-index: 1;
}
.parcours-timeline li:nth-child(1)::before { content: '1'; }
.parcours-timeline li:nth-child(2)::before { content: '2'; }
.parcours-timeline li:nth-child(3)::before { content: '3'; }
.parcours-timeline li:nth-child(4)::before { content: '4'; }

.step-content h3 { font-size: 1.1rem; color: var(--color-primary); margin-bottom: 8px; }

.sectors-section { background-color: var(--color-bg-muted); padding: 50px 20px; text-align: center; }
.sectors-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.sector h3 { font-size: 1.1rem; color: var(--color-primary); margin-bottom: 10px; }

/* =========================================
   6. PAGE DIAGNOSTIC IA
   ========================================= */
.diag-section { padding: 60px 20px; }
.hero-content-center { display: flex; flex-direction: column; align-items: center; text-align: center; width: 100%; }

ul.check-list { list-style: none; padding: 0; text-align: left; }
ul.check-list li { position: relative; padding-left: 30px; margin-bottom: 15px; line-height: 1.6; }
ul.check-list li::before { content: '✓'; position: absolute; left: 0; color: var(--color-accent); font-weight: bold; font-size: 1.2rem; }

/* =========================================
   7. PAGE CAS D'USAGE
   ========================================= */
.article-intro { font-size: 1.15rem; color: var(--color-text-light); line-height: 1.8; margin-bottom: 50px; text-align: center; max-width: 800px; margin-left: auto; margin-right: auto; }
.use-case-card { background: var(--color-bg); border-radius: 12px; padding: 40px; margin-bottom: 40px; box-shadow: 0 5px 20px rgba(0,0,0,0.05); border-left: 5px solid var(--color-primary); text-align: left; }
.use-case-card h2 { color: var(--color-primary); font-size: 1.8rem; margin-bottom: 20px; display: flex; align-items: center; gap: 15px; }
.problem-box { background: var(--color-bg-accent); border-left: 4px solid var(--color-accent); padding: 20px; border-radius: 0 8px 8px 0; margin-bottom: 20px; }
.solution-box { background: #f4f6f8; border-left: 4px solid var(--color-primary); padding: 20px; border-radius: 0 8px 8px 0; margin-bottom: 20px; }
.roi-box { background: #e8f5e9; border-left: 4px solid #4caf50; padding: 20px; border-radius: 0 8px 8px 0; font-weight: 500; color: var(--color-primary); display: flex; align-items: flex-start; gap: 10px; }

/* =========================================
   8. PAGE FAQ & CHARTE IA
   ========================================= */
.faq-page-container { max-width: 1000px; margin: 60px auto; padding: 0 20px; }
.charte-intro { text-align: center; margin-bottom: 50px; max-width: 850px; margin-left: auto; margin-right: auto; }
.charte-intro h1 { color: var(--color-primary); font-size: 2.2rem; margin-bottom: 20px; }
.charte-intro p { color: var(--color-text-light); font-size: 1.1rem; line-height: 1.8; }
.faq-category-title { color: var(--color-primary); font-size: 1.5rem; margin-top: 40px; margin-bottom: 20px; border-bottom: 2px solid var(--color-accent); padding-bottom: 10px; display: inline-block; }

.faq-container { display: flex; flex-direction: column; gap: 15px; margin-bottom: 30px; }
details { background: var(--color-bg); border: 1px solid #eee; border-left: 5px solid var(--color-primary); border-radius: 8px; transition: all 0.3s ease; }
details[open] { border-left-color: var(--color-accent); box-shadow: 0 8px 25px rgba(0,0,0,0.08); }
summary { padding: 20px; font-size: 1.1rem; font-weight: 600; color: var(--color-primary); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; font-size: 1.5rem; color: var(--color-accent); transition: transform 0.3s ease; }
details[open] summary::after { content: '−'; transform: rotate(180deg); }
.faq-answer { padding: 0 20px 20px 20px; color: var(--color-text-light); line-height: 1.7; }
.faq-answer strong { color: var(--color-primary); }

.dynamic-question-box { background-color: var(--color-bg-accent); border: 1px solid var(--color-accent); border-radius: 12px; padding: 40px 30px; text-align: center; margin-top: 50px; margin-bottom: 60px; box-shadow: 0 5px 20px rgba(228, 196, 65, 0.15); }

/* =========================================
   9. PAGE CONTACT
   ========================================= */
.contact-page-container { max-width: 800px; margin: 60px auto; padding: 0 20px; text-align: center; }
.contact-card { background: var(--color-bg); padding: 40px; border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); border: 1px solid #eee; text-align: left; }
.contact-card label { display: block; margin-bottom: 8px; font-weight: 600; color: var(--color-primary); }
.contact-card input, .contact-card textarea { width: 100%; padding: 12px; margin-bottom: 20px; border: 1px solid #ccc; border-radius: 8px; font-family: var(--font-family); }
.btn-submit { background-color: var(--color-accent); color: var(--color-primary); border: none; width: 100%; padding: 18px; font-weight: 700; border-radius: 8px; cursor: pointer; font-size: 1.1rem; transition: 0.3s; }
.btn-submit:hover { opacity: 0.9; transform: translateY(-2px); }

/* =========================================
   10. RESPONSIVITÉ (MOBILES & TABLETTES)
   ========================================= */
@media (max-width: 992px) {
    .main-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .hero, .boussole h2 {
        text-align: center;
    }
}

@media (max-width: 768px) {
    .flex-row { 
        flex-direction: column; 
    }
    .hero h1 {
        font-size: 1.8rem;
    }
    .logo img {
        height: 80px;
    }
    .parcours-timeline {
        padding-left: 40px;
    }
    .parcours-timeline::before {
        left: 17px;
    }
}