body {
    background: #ffffff;
    font-family: Arial, sans-serif;
    color: #111;
}

.navbar {
    background: #fff !important;
    border-bottom: 2px solid #111;
    border-radius: 0;
    padding: 14px 0;
    margin-bottom: 35px;
}

.navbar-brand {
    color: #111 !important;
    font-weight: bold;
    border: 2px solid #111;
    padding: 6px 10px;
    margin-right: 25px;
}

.nav-link {
    color: #111 !important;
    margin-right: 18px;
    font-size: 14px;
}

.nav-link.active,
.nav-link:hover {
    border-bottom: 2px solid #111;
}

.page-card {
    background: #fff;
    border: 2px solid #111;
    padding: 28px;
    margin-bottom: 25px;
    box-shadow: 5px 5px 0 rgba(0,0,0,0.12);
}

.hero {
    background: #fff;
    color: #111;
    border: 2px solid #111;
    padding: 45px;
    box-shadow: 5px 5px 0 rgba(0,0,0,0.15);
    margin-bottom: 25px;
}

h1 {
    font-size: 42px;
    font-weight: 500;
}

h2, h3, h4, h5 {
    color: #111;
    font-weight: 600;
}

.small-text {
    color: #555;
    font-size: 14px;
}

.btn-primary,
.btn-success,
.btn-dark {
    background: #111;
    border-color: #111;
    color: #fff;
}

.btn-primary:hover,
.btn-success:hover,
.btn-dark:hover {
    background: #333;
    border-color: #333;
}

.btn-outline-primary,
.btn-outline-dark {
    color: #111;
    border-color: #111;
}

.btn-outline-primary:hover,
.btn-outline-dark:hover {
    background: #111;
    color: #fff;
}

.btn-warning {
    background: white;
    color: #111;
    border: 2px solid #111;
}

.btn-danger {
    background: #fff;
    color: #b00020;
    border: 2px solid #b00020;
}

.table {
    background: #fff;
    border: 2px solid #111;
}

.table th {
    background: #f5f5f5;
    color: #111;
    border-bottom: 2px solid #111;
    font-size: 13px;
    text-transform: uppercase;
}

.table td {
    vertical-align: middle;
}

.form-control {
    border: 2px solid #111;
    border-radius: 0;
}

.form-control:focus {
    border-color: #111;
    box-shadow: none;
}

.course-card {
    border: 2px solid #111;
    border-radius: 0;
    box-shadow: 5px 5px 0 rgba(0,0,0,0.12);
    height: 100%;
}

.course-card img {
    height: 170px;
    object-fit: cover;
    border-bottom: 2px solid #111;
}

.stat-box {
    border: 2px solid #111;
    padding: 18px;
    background: white;
    margin-bottom: 20px;
}

.stat-number {
    font-size: 28px;
    font-weight: bold;
}

.login-box {
    max-width: 430px;
    margin: 80px auto;
    border: 2px solid #111;
    padding: 35px;
    box-shadow: 6px 6px 0 rgba(0,0,0,0.15);
}

.side-note {
    border: 2px solid #111;
    padding: 20px;
    background: #fff;
    box-shadow: 4px 4px 0 rgba(0,0,0,0.12);
}