body { font-family: 'Segoe UI', Arial, sans-serif; margin: 0; background: #f4f7f6; color: #333; display: flex; }
.sidebar { width: 240px; background: #2c3e50; color: white; height: 100vh; padding: 20px; position: fixed; box-sizing: border-box; }
.content { margin-left: 240px; padding: 40px; width: 100%; box-sizing: border-box; }

.sidebar img { max-width: 100%; height: auto; display: block; margin-bottom: 30px; }
.nav-link { display: block; color: #bdc3c7; padding: 12px 15px; text-decoration: none; border-radius: 5px; margin-bottom: 5px; transition: 0.3s; }
.nav-link:hover, .nav-link.active { background: #34495e; color: white; }

h1, h2 { color: #2c3e50; margin-top: 0; }
.stats { display: flex; gap: 20px; margin-bottom: 30px; }
.card { background: white; padding: 20px; border-radius: 8px; flex: 1; box-shadow: 0 2px 10px rgba(0,0,0,0.05); text-align: center; }
.card h3 { font-size: 14px; color: #7f8c8d; margin: 0; }
.card p { font-size: 30px; font-weight: bold; margin: 10px 0; color: #2c3e50; }

table { width: 100%; background: white; border-collapse: collapse; border-radius: 10px; overflow: hidden; box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
th, td { padding: 15px; text-align: left; border-bottom: 1px solid #f0f0f0; }
th { background: #f8f9fa; font-weight: 600; color: #555; }

.btn { display: inline-block; padding: 8px 16px; border-radius: 4px; text-decoration: none; font-size: 13px; font-weight: 500; cursor: pointer; border: none; transition: 0.2s; }
.btn-blue { background: #3498db; color: white; }
.btn-red { background: #e74c3c; color: white; }
.btn-purple { background: #9b59b6; color: white; }
.btn:hover { opacity: 0.8; }

input[type="text"], input[type="time"], input[type="number"], select { padding: 10px; border: 1px solid #ddd; border-radius: 4px; margin-right: 5px; }