body { font-family: 'Segoe UI', sans-serif; background: #f4f6f9; margin: 0; }
.login-container { width: 100%; max-width: 400px; margin: 100px auto; padding: 30px; background: white; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.admin-container { display: flex; min-height: 100vh; }
.sidebar { width: 250px; background: #343a40; color: white; padding: 20px; }
.sidebar a { display: block; color: #c2c7d0; text-decoration: none; padding: 10px 0; border-bottom: 1px solid #4b545c; }
.sidebar a:hover { color: white; }
.content { flex: 1; padding: 30px; }
.card { background: white; padding: 20px; border-radius: 5px; box-shadow: 0 0 10px rgba(0,0,0,0.05); margin-bottom: 20px; }
input[type="text"], input[type="password"], textarea { width: 100%; padding: 10px; margin: 10px 0; border: 1px solid #ddd; border-radius: 4px; box-sizing: border-box; }
button { padding: 10px 20px; background: #007bff; color: white; border: none; border-radius: 4px; cursor: pointer; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { padding: 12px; border-bottom: 1px solid #eee; text-align: left; }
.alert { padding: 10px; background: #d4edda; color: #155724; border-radius: 4px; margin-bottom: 15px; }