/* Core layout */
*{box-sizing:border-box}
body{font-family:'Segoe UI',Tahoma,Geneva,Verdana,sans-serif;background:#f5f7fb;margin:0;color:#2c3e50}
.container{max-width:1200px;margin:0 auto;padding:20px}
.header{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.back{background:#95a5a6;color:#fff;border:none;padding:8px 12px;border-radius:8px;cursor:pointer}
.card{background:#fff;border-radius:12px;box-shadow:0 4px 16px rgba(0,0,0,.08);padding:20px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.col{flex:1 1 260px}

/* Forms */
label{display:block;margin-bottom:6px;font-weight:600;color:#2c3e50}
input,select{width:100%;padding:10px;border:2px solid #e0e0e0;border-radius:8px;background:#fff}
input:focus,select:focus{outline:none;border-color:#3498db}
button{font-family:inherit}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;border:none;cursor:pointer;border-radius:8px;padding:10px 14px}
.btn-primary{background:#007bff;color:#fff}
.btn-secondary{background:#95a5a6;color:#fff}
.btn-gradient{background:linear-gradient(45deg,#3498db,#2ecc71);color:#fff}

/* Status */
.status{margin:10px 0}
.success{color:#155724;background:#d4edda;border:1px solid #c3e6cb;padding:8px;border-radius:6px}
.error{color:#721c24;background:#f8d7da;border:1px solid #f5c6cb;padding:8px;border-radius:6px}

/* Table */
.table-wrap{max-height:70vh;overflow:auto;margin-top:12px}
table{width:100%;border-collapse:collapse;background:#fff;border-radius:8px}
th,td{padding:10px;border-bottom:1px solid #e9ecef}
th{background:#f8f9fa;text-align:center}

/* Utility */
.hidden{display:none}
.mt-2{margin-top:8px}
.mt-3{margin-top:12px}
.mt-4{margin-top:16px}