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

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap');

body {
    font-family: 'Open Sans', sans-serif;
    background-color: #f4f7fc;
    color: #333;
    /* Ensure content doesn't hide under fixed header or footer */
    padding-top: 70px;
    padding-bottom: 60px;
    margin: 0;
}

/* Fixed header */
.navbar {
    background: linear-gradient(45deg, #3949ab, #8e99f3);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 0.5rem 1rem;
}

.navbar-brand {
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff !important;
}

.navbar-nav .nav-link {
    color: #fff !important;
    margin-left: 1rem;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover {
    color: #c5cae9 !important;
}

/* Containers */
.container, .container-fluid {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}

/* Jumbotron */
.jumbotron {
    background: linear-gradient(45deg, #3949ab, #8e99f3);
    color: #fff;
    padding: 40px 20px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    text-align: center;
    margin-bottom: 20px;
}

/* Cards */
.card {
    border: none;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

.card-header {
    background-color: #fff;
    border-bottom: 2px solid #e0e0e0;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 15px;
}

.card-body {
    padding: 20px;
}

.card-footer {
    background-color: #fff;
    border-top: 1px solid #e0e0e0;
    padding: 15px;
    text-align: right;
}

/* Tables */
.table {
    margin-bottom: 0;
}

.table-hover tbody tr:hover {
    background-color: #f1f1f1;
}

.table th, .table td {
    vertical-align: middle;
}

/* Sidebar / List-group */
.list-group-item {
    border: none;
    padding: 12px 16px;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.list-group-item.active {
    background-color: #3949ab;
    border-color: #3949ab;
    font-weight: 600;
}

.list-group-item:hover {
    background-color: #e0e0e0;
}

/* Forms */
.form-control {
    border-radius: 4px;
    padding: 10px;
    font-size: 1rem;
}

.form-control-file {
    font-size: 1rem;
}

.btn {
    border-radius: 4px;
}

/* Footer */
footer {
    background: linear-gradient(45deg, #3949ab, #8e99f3);
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    font-size: 0.9rem;
    box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
}

/* Responsive adjustments */
@media (max-width: 767.98px) {
    .navbar-brand {
        font-size: 1.5rem;
    }
    .navbar-nav .nav-link {
        margin-left: 0;
        font-size: 0.9rem;
    }
    .container, .container-fluid {
        margin: 10px;
        padding: 15px;
    }
    .jumbotron {
        padding: 30px 15px;
    }
    .card-header, .card-body, .card-footer {
        padding: 10px;
    }
}