diff --git a/hmdooris/static/main.css b/hmdooris/static/main.css
index 3b28ff1..08a526b 100644
--- a/hmdooris/static/main.css
+++ b/hmdooris/static/main.css
@@ -62,18 +62,18 @@ body {
 }
 
 .lock__line button.lock__button__lock,
-.lock__line .lock__state-icon.lock__state-icon--locked {
+.lock__state-icon--locked {
     background-color: #f88;
 }
 
 .lock__line button.lock__button__unlock,
-.lock__line .lock__state-icon.lock__state-icon--unlocked {
+.lock__state-icon--unlocked {
     background-color: #8f8;
 }
 
 .lock__line button.lock__button__lock:disabled,
 .lock__line button.lock__button__unlock:disabled,
-.lock__line .lock__state-icon.lock__state-icon--unknown {
+.lock__state-icon--unknown {
     background-color: #ccc;
     color: #444;
 }