/* ============================================
   CHARTE GRAPHIQUE - Saas DigitalCard
   Basée sur les couleurs du logo
   ============================================ */

:root {
    /* Couleurs principales - issues du logo */
    --primary-dark: #0a1628;      /* Bleu marine profond */
    --primary-blue: #1a2a4a;       /* Bleu nuit */
    --secondary-blue: #2a7de1;     /* Bleu électrique */
    --accent-blue: #1e5aa7;        /* Bleu moyen */
    --light-blue: #e8f0fe;         /* Bleu très clair */
    
    /* Couleurs de texte */
    --text-white: #ffffff;
    --text-light: #c8d6e5;
    --text-dark: #1a2a4a;
    --text-muted: #6b7f8f;
    
    /* Fond */
    --bg-light: #f0f4f8;
    --bg-white: #ffffff;
    --bg-dark: #0a1628;
    
    /* Ombres */
    --shadow: 0 5px 25px rgba(10, 22, 40, 0.15);
    --shadow-hover: 0 10px 40px rgba(10, 22, 40, 0.25);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Bordures */
    --border-radius: 10px;
}

/* ============================================
   RESET & BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.7;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    text-decoration: none;
    transition: var(--transition);
}

/* ============================================
   BOUTONS
   ============================================ */
.btn {
    display: inline-block;
    padding: 14px 35px;
    background-color: var(--secondary-blue);
    color: var(--text-white);
    border: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(42, 125, 225, 0.3);
}

.btn:hover {
    background-color: var(--accent-blue);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(42, 125, 225, 0.4);
}

.btn-accent {
    background-color: var(--primary-dark);
    box-shadow: 0 4px 15px rgba(10, 22, 40, 0.3);
}

.btn-accent:hover {
    background-color: #1a2a4a;
    box-shadow: 0 8px 30px rgba(10, 22, 40, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--secondary-blue);
    border: 2px solid var(--secondary-blue);
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--secondary-blue);
    color: var(--text-white);
    box-shadow: 0 8px 30px rgba(42, 125, 225, 0.3);
}

/* ============================================
   HEADER
   ============================================ */
header {
    background-color: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 3px solid var(--secondary-blue);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-dark);
    letter-spacing: -0.5px;
}

.logo-text span {
    color: var(--secondary-blue);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 5px;
}

nav ul li a {
    color: var(--text-dark);
    font-weight: 600;
    padding: 8px 18px;
    border-radius: 50px;
    transition: var(--transition);
    font-size: 0.9rem;
}

nav ul li a:hover {
    color: var(--secondary-blue);
    background-color: var(--light-blue);
}

nav ul li a.active {
    color: var(--text-white);
    background-color: var(--secondary-blue);
    box-shadow: 0 4px 15px rgba(42, 125, 225, 0.3);
}

/* ============================================
   SECTION TITRES
   ============================================ */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary-dark);
    position: relative;
    padding-bottom: 18px;
    font-weight: 800;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-blue), var(--primary-dark));
    border-radius: 2px;
}

.section-title p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 650px;
    margin: 15px auto 0;
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    background-color: var(--primary-dark);
    color: var(--text-light);
    padding: 60px 0 30px;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--text-white);
    position: relative;
    padding-bottom: 12px;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--secondary-blue);
    border-radius: 2px;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: var(--text-light);
    transition: var(--transition);
}

.footer-column ul li a:hover {
    color: var(--secondary-blue);
    padding-left: 5px;
}

.footer-column ul li i {
    width: 25px;
    color: var(--secondary-blue);
}

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    color: var(--text-white);
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--secondary-blue);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 992px) {
    .header-container {
        flex-direction: column;
        gap: 15px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li a {
        padding: 6px 14px;
        font-size: 0.85rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 50px 0;
    }
    
    .section-title h2 {
        font-size: 2rem;
    }
    
    .logo-text {
        font-size: 20px;
    }
    
    .logo-img {
        height: 40px;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-column h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .social-links {
        justify-content: center;
    }
}