body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f7f6;
}

.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://via.placeholder.com/1500x800' ) no-repeat center center/cover;
    height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.hero-section p {
    font-size: 1.5rem;
}

.card {
    border: none;
    border-radius: 0.75rem;
    box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.08);
    transition: transform 0.2s ease-in-out;
}

.card:hover {
    transform: translateY(-5px);
}

.card-title {
    color: #007bff;
    font-weight: 600;
}

.list-group-item.active {
    background-color: #007bff !important;
    border-color: #007bff !important;
}

/* Sidebar styles */
#wrapper {
    display: flex;
}

#sidebar-wrapper {
    min-height: 100vh;
    margin-left: -15rem;
    transition: margin .25s ease-out;
    width: 15rem;
}

#sidebar-wrapper .sidebar-heading {
    padding: 0.875rem 1.25rem;
    font-size: 1.2rem;
}

#sidebar-wrapper .list-group {
    width: 15rem;
}

#page-content-wrapper {
    min-width: 100vw;
}

#wrapper.toggled #sidebar-wrapper {
    margin-left: 0;
}

@media (min-width: 768px) {
    #sidebar-wrapper {
        margin-left: 0;
    }

    #page-content-wrapper {
        min-width: 0;
        width: 100%;
    }

    #wrapper.toggled #sidebar-wrapper {
        margin-left: -15rem;
    }
}

/* Chat IA styles */
.chat-message {
    padding: 5px 0;
}

.chat-message.user {
    text-align: right;
    color: #007bff;
}

.chat-message.ai {
    text-align: left;
    color: #28a745;
}

.min-vh-100 {
    min-height: 100vh;
}

.shadow-sm {
    box-shadow: 0 .125rem .25rem rgba(0,0,0,.075)!important;
}