body { font-family:'Segoe UI', sans-serif; margin:0; padding:0; background:#f4f4f4; }
header { display:flex; justify-content:space-between; align-items:center; padding:20px; background:#4CAF50; color:white; }
button { cursor:pointer; border:none; padding:10px 15px; border-radius:5px; background:#2e7d32; color:white; }
.auth, .app { max-width:900px; margin:20px auto; padding:20px; background:white; border-radius:10px; box-shadow:0 0 15px rgba(0,0,0,0.1); }
input { display:block; width:100%; margin:8px 0; padding:10px; border-radius:5px; border:1px solid #ccc; }
.add-assignment, .tonight, .analytics { margin-top:20px; padding:15px; background:#f9f9f9; border-radius:8px; }
.tonight ul { list-style:none; padding-left:0; }
.tonight li { padding:5px 0; }