body{font-family:Segoe UI,sans-serif;margin:0;background:linear-gradient(135deg,#667eea,#764ba2)}.hidden{display:none}.login-container{min-height:100vh;display:flex;justify-content:center;align-items:center}.login-box{background:#fff;padding:35px;border-radius:20px;width:380px;box-shadow:0 20px 50px #0000004d}.login-title{text-align:center;font-size:26px;font-weight:700;margin-bottom:10px}.form-group{margin-bottom:15px}.form-input{width:100%;padding:12px;border-radius:10px;border:2px solid #e5e7eb;margin-bottom:10px}.btn{width:100%;padding:12px;border:none;border-radius:10px;font-weight:600;cursor:pointer}.btn-primary{background:#667eea;color:#fff}.btn-secondary{background:none;color:#667eea;margin-top:10px}.dashboard{background:#f5f7fa;min-height:100vh}.header{background:#fff;padding:15px 30px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 3px 10px #0000001a}.main-content{padding:30px;max-width:1200px;margin:auto}.card{background:#fff;padding:20px;border-radius:15px;box-shadow:0 5px 15px #0000001a}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}.alert{background:#dc2626;color:#fff;padding:20px;border-radius:15px;margin-bottom:20px}.chart-container{margin-top:30px;background:#fff;padding:25px;border-radius:15px}.logout-btn{padding:10px 20px;border:none;border-radius:10px;cursor:pointer;background:#667eea;color:#fff}