:root {
    --primary-color: #007BFF; /* Bleu vif */
    --secondary-color: #6c757d; /* Gris */
    --accent-color: #28a745; /* Vert pour CTA */
    --text-color: #343a40; /* Texte foncé */
    --light-bg: #f8f9fa; /* Fond clair */
    --white: #ffffff;
    --shadow: rgba(0, 0, 0, 0.08);
    --border-radius: 8px;
}

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

body {
    font-family: 'Montserrat', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
    scroll-behavior: smooth;
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: var(--white);
    padding: 1rem 0;
    box-shadow: 0 2px 10px var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar { /* Le conteneur .container à l'intérieur du header */
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-color);
}

.logo img {
    height: 40px;
    margin-right: 10px;
}

/* Bouton de bascule du menu mobile */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--primary-color);
    cursor: pointer;
    padding: 5px;
    transition: color 0.3s ease;
}

.menu-toggle:hover {
    color: var(--accent-color);
}

/* Conteneur de navigation principal (liens et bouton de contact) */
.main-nav {
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-links {
    display: flex;
    gap: 25px;
}

.nav-links a {
    font-family: 'Poppins', sans-serif;
    font-weight: 500;
    color: var(--text-color);
    padding: 5px 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.nav-links a:hover::after {
    width: 100%;
}

.contact-btn {
    background-color: var(--accent-color);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 8px rgba(40, 167, 69, 0.2);
}

.contact-btn:hover {
    background-color: #218838;
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(40, 167, 69, 0.3);
}

/* Hero Section - Présentation DigiSousse */
.hero {
    background: linear-gradient(rgba(0, 123, 255, 0.8), rgba(0, 123, 255, 0.8)), url('https://via.placeholder.com/1920x800/007bff/ffffff?text=Sousse+Digitale') no-repeat center center/cover;
    color: var(--white);
    text-align: center;
    padding: 100px 20px;
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    margin: 20px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
    transform: rotate(45deg);
    animation: pulse 10s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1) rotate(45deg); opacity: 0.8; }
    100% { transform: scale(1.1) rotate(47deg); opacity: 1; }
}

.hero h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 700;
    animation: fadeInDown 1s ease-out;
}

.hero p {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto 30px;
    animation: fadeInUp 1s ease-out 0.3s;
}

.hero .hero-logo {
    margin-bottom: 30px;
    animation: zoomIn 1s ease-out 0.6s;
}

.hero .hero-logo img {
    max-height: 120px;
    filter: drop-shadow(0 5px 10px rgba(0,0,0,0.3));
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-50px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(50px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.5); }
    to { opacity: 1; transform: scale(1); }
}

/* Sections générales */
.section {
    padding: 80px 0;
    margin: 20px;
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: 0 5px 20px var(--shadow);
}

.section-title {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: var(--primary-color);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--accent-color);
    border-radius: 2px;
}

/* Applications Grid */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

/* Styles pour les cartes cliquables */
.app-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden; /* Important pour cacher le contenu qui dépasse pendant la transition */
    cursor: pointer; /* Indique que la carte est cliquable */
    padding-bottom: 40px; /* Espace pour le bouton "Voir plus/moins" */
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background-color: var(--primary-color);
    transform: translateX(-100%);
    transition: transform 0.3s ease-out;
}

.app-card:hover::before {
    transform: translateX(0);
}

.app-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.app-card h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.app-card h3 i {
    margin-right: 10px;
    color: var(--accent-color);
}

.app-card > p:first-of-type { /* Style le paragraphe d'introduction */
    margin-bottom: 15px;
}

/* Contenu des détails qui sera affiché/masqué */
.app-card-details-content {
    max-height: 0;
    opacity: 0;
    visibility: hidden; /* Cache les détails pour les lecteurs d'écran aussi */
    transition: max-height 0.5s ease-out, opacity 0.5s ease-out, visibility 0.5s;
    margin-top: 15px;
    overflow: hidden; /* Cache le contenu qui déborde pendant la transition */
    padding-top: 0; /* Pas de padding-top initial */
    border-top: 0px solid rgba(0,0,0,0.05); /* Pas de bordure initiale */
}

.app-card.expanded .app-card-details-content {
    max-height: 500px; /* Une valeur suffisamment grande pour le contenu, ajuster si besoin */
    opacity: 1;
    visibility: visible;
    padding-top: 15px;
    border-top: 1px solid rgba(0,0,0,0.05);
}

.app-card-details-content ul {
    list-style-type: disc;
    margin-left: 20px;
    color: var(--secondary-color);
}
.app-card-details-content ul li {
    margin-bottom: 8px;
}
.app-card-details-content ul li:last-child {
    margin-bottom: 0;
}

/* Indicateur "Voir plus / Voir moins" */
.read-more-toggle {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.9em;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 5px;
    transition: color 0.3s ease;
    background-color: var(--white);
    padding: 0 5px;
    border-radius: 3px;
}

.read-more-toggle i {
    transition: transform 0.3s ease;
}

.app-card.expanded .read-more-toggle i {
    transform: rotate(180deg); /* Flèche vers le haut quand étendu */
}

.app-card.expanded .read-more-toggle {
    color: var(--accent-color);
}

.app-card:hover .read-more-toggle {
    color: var(--accent-color);
}


/* Trend & Analyse Sections */
.info-section {
    text-align: center;
    padding: 60px 20px;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 3px 15px var(--shadow);
    margin-bottom: 30px;
}

.info-section h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.info-section p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-color);
}

/* Footer */
.footer {
    background-color: var(--text-color);
    color: var(--white);
    text-align: center;
    padding: 30px 20px;
    margin-top: 50px;
}

.footer p {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 992px) {
    .navbar {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .menu-toggle {
        display: block;
    }

    .main-nav {
        display: none;
        flex-direction: column;
        width: 100%;
        text-align: center;
        background-color: var(--white);
        box-shadow: 0 5px 10px var(--shadow);
        position: absolute;
        top: 100%;
        left: 0;
        padding: 20px 0;
        gap: 15px;
    }

    .main-nav.active {
        display: flex;
    }

    .nav-links {
        flex-direction: column;
        gap: 15px;
        width: 100%;
    }

    .nav-links a {
        padding: 10px 0;
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    .contact-btn {
        margin-top: 15px;
        width: fit-content;
        align-self: center;
    }

    .hero h1 {
        font-size: 2.8rem;
    }
    .hero p {
        font-size: 1.1rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .app-card h3 {
        font-size: 1.5rem;
    }
    .applications-grid {
        grid-template-columns: 1fr;
    }
    .section {
        padding: 60px 0;
    }
}

@media (max-width: 576px) {
    .hero {
        padding: 80px 15px;
    }
    .hero h1 {
        font-size: 2.2rem;
    }
    .hero p {
        font-size: 1rem;
    }
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 40px;
    }
    .logo {
        font-size: 1.5rem;
    }
    .logo img {
        height: 30px;
    }
    .menu-toggle {
        font-size: 1.5rem;
    }
    .contact-btn {
        padding: 8px 15px;
    }
    .app-card {
        padding: 20px;
    }
}

@media (max-width: 992px) {
.navbar {
flex-direction: column;
align-items: flex-start;
}

.menu-toggle {
display: block;
margin-left: auto;
}

.main-nav {
display: none;
flex-direction: column;
width: 100%;
background-color: var(--white);
box-shadow: 0 5px 10px var(--shadow);
position: absolute;
top: 100%;
left: 0;
padding: 20px 0;
gap: 15px;
}

.main-nav.active {
display: flex;
}

.nav-links {
flex-direction: column;
gap: 15px;
width: 100%;
}

.nav-links a {
padding: 10px 20px;
border-bottom: 1px solid rgba(0,0,0,0.05);
}

.nav-links a:last-child {
border-bottom: none;
}

.contact-btn {
margin-top: 15px;
width: fit-content;
align-self: center;
}
}

@media (max-width: 576px) {
.navbar {
padding: 10px;
}

.logo {
font-size: 1.5rem;
}

.logo img {
height: 30px;
}

.menu-toggle {
font-size: 1.5rem;
}

.nav-links a {
padding: 10px;
}

.contact-btn {
padding: 8px 15px;
}
}