body {
    margin: 0;
    font-family: Arial;
    background: #f1f5f9;
}

header {
    display: flex;
    align-items: center;
    background: #0f172a;
    color: white;
    padding: 15px 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 40px;
}

.hero {
    background: url('images/school.jpg') center/cover no-repeat;
    color: white;
    text-align: center;
    padding: 80px 20px;
    background-color: rgba(0,0,0,0.6);
    background-blend-mode: overlay;
}

.card {
    background: white;
    max-width: 800px;
    margin: -40px auto 40px;
    padding: 30px;
    border-radius: 10px;
}

.form {
    display: flex;
    gap: 10px;
}

.form input {
    padding: 10px;
    flex: 1;
}

.form button {
    background: #0f172a;
    color: white;
    padding: 10px 20px;
    border: none;
}

#students-list div {
    margin-top: 10px;
    padding: 10px;
    background: #e2e8f0;
}