body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at 15% 10%, rgba(37, 99, 235, 0.16), transparent 28%),
        radial-gradient(circle at 85% 12%, rgba(20, 184, 166, 0.14), transparent 24%),
        linear-gradient(135deg, #f8fbff 0%, #eef4ff 48%, #f7fafc 100%);
}

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 460px;
    background: #fff;
    border: 1px solid rgba(148, 163, 184, 0.28);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
}

.login-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
}

.login-brand__logo {
    width: 52px;
    height: 52px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #1d4ed8, #0f766e);
    color: #fff;
    font-size: 22px;
    font-weight: 700;
    box-shadow: 0 14px 28px rgba(37, 99, 235, 0.24);
}

.login-brand__text strong {
    display: block;
    font-size: 20px;
    color: #101828;
}

.login-brand__text span {
    color: #667085;
    font-size: 14px;
}

.login-title {
    margin: 0 0 6px;
    font-size: 28px;
    letter-spacing: 0;
    color: #101828;
}

.login-subtitle {
    margin: 0 0 22px;
    color: #667085;
    font-size: 14px;
}

.login-error {
    margin-bottom: 16px;
    padding: 12px 14px;
    border-radius: 8px;
    background: #fef3f2;
    border: 1px solid #fecdca;
    color: #b42318;
    font-size: 14px;
}

.login-field-gap {
    margin-top: 14px;
}

.login-actions {
    margin-top: 20px;
}

.login-submit-btn {
    width: 100%;
    min-height: 46px;
    border-radius: 8px;
    box-shadow: 0 12px 22px rgba(37, 99, 235, 0.22);
}

.login-note {
    margin-top: 18px;
    padding: 12px 14px;
    border-radius: 8px;
    background: #f8fafc;
    border: 1px dashed #d0d5dd;
    color: #667085;
    font-size: 13px;
}

.login-note strong {
    color: #101828;
}

.login-card .students-field label {
    color: #334155;
    font-weight: 700;
}

.login-card .students-field input {
    min-height: 46px;
    border-radius: 8px;
    border-color: #cbd5e1;
    background: #f8fafc;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.login-card .students-field input:focus {
    background: #ffffff;
    border-color: #2563eb;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
    outline: none;
}

@media (max-width: 520px) {
    .login-page {
        padding: 16px;
    }

    .login-card {
        padding: 22px;
    }

    .login-title {
        font-size: 24px;
    }
}