:root{--primary:#1e3a5f;--primary-light:#2a5298;--accent:#f0ad4e;--success:#28a745;--danger:#dc3545;--warning:#ffc107;--bg:#f4f6f9;--card:#fff;--text:#333;--text-muted:#6c757d;--border:#dee2e6;--sidebar-w:250px;--radius:8px}
*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Inter',-apple-system,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}a{color:var(--primary-light);text-decoration:none}a:hover{text-decoration:underline}
.app{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar-w);background:var(--primary);color:#fff;position:fixed;top:0;left:0;bottom:0;overflow-y:auto;z-index:100;transition:transform .25s}
.sidebar-brand{padding:20px;font-size:18px;font-weight:700;border-bottom:1px solid rgba(255,255,255,.1);display:flex;align-items:center;gap:10px}.sidebar-brand span{color:var(--accent)}
.sidebar-nav{padding:12px 0}.sidebar-nav a{display:flex;align-items:center;gap:10px;padding:10px 20px;color:rgba(255,255,255,.75);font-size:14px;transition:.15s}
.sidebar-nav a:hover,.sidebar-nav a.active{background:rgba(255,255,255,.1);color:#fff;text-decoration:none}
.sidebar-nav .divider{height:1px;background:rgba(255,255,255,.1);margin:8px 20px}.sidebar-section{padding:8px 20px 4px;font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:rgba(255,255,255,.4)}
.main{margin-left:var(--sidebar-w);flex:1;display:flex;flex-direction:column}
.topbar{background:var(--card);border-bottom:1px solid var(--border);padding:14px 28px;display:flex;align-items:center;justify-content:space-between}
.topbar h1{font-size:18px;font-weight:600}.topbar-user{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-muted)}
.content{padding:24px 28px;flex:1}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px}
.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.card-title{font-size:16px;font-weight:600}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-align:center}
.stat-card .number{font-size:32px;font-weight:700;color:var(--primary)}.stat-card .label{font-size:13px;color:var(--text-muted);margin-top:4px}
.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:14px}
thead th{background:var(--bg);padding:10px 12px;text-align:left;font-weight:600;font-size:13px;color:var(--text-muted);border-bottom:2px solid var(--border)}
tbody td{padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:middle}tbody tr:hover{background:#f8f9fa}
.form-group{margin-bottom:16px}.form-group label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--text-muted)}
.form-control{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;transition:border-color .15s}
.form-control:focus{outline:none;border-color:var(--primary-light);box-shadow:0 0 0 3px rgba(42,82,152,.1)}
select.form-control{cursor:pointer}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;transition:.15s;text-decoration:none;line-height:1.4}
.btn:hover{text-decoration:none;opacity:.9}.btn-primary{background:var(--primary);color:#fff}.btn-success{background:var(--success);color:#fff}
.btn-danger{background:var(--danger);color:#fff}.btn-warning{background:var(--warning);color:#333}.btn-light{background:#e9ecef;color:var(--text)}
.btn-sm{padding:5px 10px;font-size:13px}.btn-group{display:flex;gap:8px;flex-wrap:wrap}
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}
.badge-success{background:#d4edda;color:#155724}.badge-danger{background:#f8d7da;color:#721c24}.badge-warning{background:#fff3cd;color:#856404}.badge-info{background:#d1ecf1;color:#0c5460}.badge-secondary{background:#e2e3e5;color:#383d41}
.alert{padding:12px 16px;border-radius:var(--radius);margin-bottom:16px;font-size:14px}
.alert-success{background:#d4edda;color:#155724;border:1px solid #c3e6cb}.alert-danger{background:#f8d7da;color:#721c24;border:1px solid #f5c6cb}
.menu-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;padding:4px 8px}
.section-divider{border-top:1px solid var(--border);margin:20px 0;padding-top:20px}
@media(max-width:768px){.sidebar{transform:translateX(-100%)}.sidebar.open{transform:translateX(0)}.main{margin-left:0}.menu-toggle{display:block}.form-row{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr}.content{padding:16px}.topbar{padding:12px 16px}}

/* Mobile-first improvements for drivers */
@media(max-width:768px){
  .card{padding:14px}
  .card-title{font-size:15px}
  .form-group label{font-size:12px}
  .form-control{padding:10px 12px;font-size:16px}
  select.form-control{font-size:16px;padding:10px 12px}
  .btn{padding:10px 16px;font-size:15px}
  .btn-sm{padding:8px 12px;font-size:14px}
  table{font-size:13px}
  thead th{padding:8px 6px;font-size:12px}
  tbody td{padding:8px 6px}
  .stat-card .number{font-size:24px}
  .stat-card .label{font-size:11px}
  .stat-card{padding:14px}
  .topbar h1{font-size:15px}
  .yolcu-row{padding:10px}
  .card-header{flex-direction:column;gap:10px;align-items:flex-start}
  .btn-group{width:100%}
  .btn-group .btn{flex:1;justify-content:center}
  .sidebar-brand{padding:16px}
  .sidebar-nav a{padding:12px 20px;font-size:15px}
}
@media(max-width:480px){
  .content{padding:10px}
  .topbar{padding:10px 12px}
  .form-row{grid-template-columns:1fr;gap:8px}
  .stats{grid-template-columns:1fr 1fr;gap:10px}
  .table-wrap{margin:0 -14px}
  table{min-width:auto}
}