/* =============================================
   VARIABLES - Couleurs GROUPE BIOU SA
   ============================================= */
:root {
    /* Bleu institutionnel (à ajuster selon le logo) */
    --primary-blue: #0A3D8F;
    --dark-blue: #052E6B;
    --light-blue: #E8F0FE;
    
    /* Orange d'accent (à ajuster selon le logo) */
    --primary-orange: #F57C00;
    --light-orange: #FFF3E0;
    
    /* Neutres */
    --white: #ffffff;
    --dark: #1a1a2e;
    --gray: #6c757d;
    --light-gray: #f8f9fa;
}

/* =============================================
   TYPOGRAPHIE
   ============================================= */
body {
    font-family: 'Nunito', sans-serif;
    color: var(--dark);
    padding-top: 72px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
}

/* =============================================
   HEADER
   ============================================= */
.header {
    transition: all 0.3s ease;
}

.header.sticky-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--white);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.navbar .nav-link {
    font-weight: 600;
    color: var(--dark);
    transition: color 0.3s ease;
}

.navbar .nav-link:hover {
    color: var(--primary-blue);
}

.btn-orange {
    background: var(--primary-orange);
    color: var(--white);
    font-weight: 600;
    padding: 10px 24px;
    border-radius: 50px;
    transition: all 0.3s ease;
}

.btn-orange:hover {
    background: var(--dark-blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(245, 124, 0, 0.3);
}

/* =============================================
   HERO
   ============================================= */
.hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
    padding: 100px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(245, 124, 0, 0.1) 0%, transparent 70%);
    transform: rotate(-15deg);
}

.hero h1 {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
}

.hero .subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.hero .btn-hero-primary {
    background: var(--primary-orange);
    color: var(--white);
    padding: 14px 40px;
    border-radius: 50px;
    font-weight: 700;
    transition: all 0.3s ease;
    margin-right: 15px;
}

.hero .btn-hero-primary:hover {
    background: var(--white);
    color: var(--primary-blue);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.hero .btn-hero-secondary {
    border: 2px solid var(--white);
    color: var(--white);
    padding: 14px 40px;
    border-radius: 50px;
    font-weight: 700;
    transition: all 0.3s ease;
}

.hero .btn-hero-secondary:hover {
    background: var(--white);
    color: var(--primary-blue);
}

/* =============================================
   SECTIONS
   ============================================= */
.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    color: var(--primary-orange);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: var(--primary-orange);
    margin: 1rem auto;
    border-radius: 2px;
}

/* =============================================
   CARTES D'ACTIVITÉS
   ============================================= */
.activity-card {
    background: var(--white);
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    height: 100%;
    border: 1px solid #eee;
}

.activity-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
    border-color: var(--primary-orange);
}

.activity-card .icon {
    width: 70px;
    height: 70px;
    background: var(--light-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    color: var(--primary-blue);
    transition: all 0.3s ease;
}

.activity-card:hover .icon {
    background: var(--primary-orange);
    color: var(--white);
    transform: scale(1.1);
}

.activity-card h4 {
    font-weight: 700;
    margin-bottom: 15px;
}

.activity-card .btn-outline-primary {
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    border-radius: 50px;
    padding: 8px 25px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.activity-card .btn-outline-primary:hover {
    background: var(--primary-blue);
    color: var(--white);
}

/* =============================================
   FOOTER
   ============================================= */
.footer {
    background: var(--dark-blue) !important;
}

.footer h5 {
    font-weight: 700;
    color: var(--white);
}

.footer a {
    transition: all 0.3s ease;
}

.footer a:hover {
    color: var(--primary-orange) !important;
    text-decoration: none;
}

/* =============================================
   PAGE CONTACT
   ============================================= */
.contact-form .form-control {
    border-radius: 12px;
    padding: 12px 18px;
    border: 2px solid #e0e0e0;
    transition: all 0.3s ease;
}

.contact-form .form-control:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 0.2rem rgba(10, 61, 143, 0.15);
}

.contact-form .btn-submit {
    background: var(--primary-orange);
    color: var(--white);
    padding: 14px 40px;
    border-radius: 50px;
    font-weight: 700;
    border: none;
    transition: all 0.3s ease;
}

.contact-form .btn-submit:hover {
    background: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(245, 124, 0, 0.3);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
    body {
        padding-top: 62px;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero {
        padding: 60px 0 40px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero .btn-hero-primary,
    .hero .btn-hero-secondary {
        display: block;
        width: 100%;
        margin: 10px 0;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2rem;
    }
}

/* =============================================
   ANIMATIONS
   ============================================= */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}