:root{--navy: #5C2D91;--navy-light: #7E4FB0;--navy-bg: #F2ECF7;--gray: #444444;--border: #d9d3e3;--bg: #f7f6fa;--success: #1e7e34;--danger: #b02a37;--warning: #b8860b}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:Segoe UI,Arial,sans-serif;background:var(--bg);color:#1a1a1a}a{color:var(--navy)}.app-shell{display:flex;min-height:100vh}.sidebar{width:230px;background:var(--navy);color:#fff;display:flex;flex-direction:column;padding:20px 0;flex-shrink:0}.sidebar .brand{padding:0 20px 20px;font-weight:700;font-size:18px;border-bottom:1px solid rgba(255,255,255,.2);margin-bottom:12px}.sidebar nav{display:flex;flex-direction:column}.sidebar nav a{color:#f0e9f7;text-decoration:none;padding:10px 20px;font-size:14px}.sidebar nav a.active,.sidebar nav a:hover{background:#ffffff1f;color:#fff}.sidebar .user-box{margin-top:auto;padding:14px 20px;font-size:12px;border-top:1px solid rgba(255,255,255,.2)}.sidebar .user-box button{margin-top:8px;background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff;padding:5px 10px;border-radius:4px;cursor:pointer;font-size:12px}.main{flex:1;padding:28px 32px;max-width:1200px}h1{font-size:22px;color:var(--navy);margin:0 0 18px}h2{font-size:17px;color:var(--navy);margin:0 0 12px}.card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:18px 20px;margin-bottom:18px}.section-bar{background:var(--navy);color:#fff;font-weight:700;font-size:13px;padding:7px 12px;border-radius:4px 4px 0 0;margin-top:10px}table.data-table{width:100%;border-collapse:collapse;font-size:13px}table.data-table th,table.data-table td{border:1px solid var(--border);padding:7px 10px;text-align:left}table.data-table th{background:var(--navy-bg);color:var(--navy);font-weight:600}table.data-table tr:hover{background:#faf8fc}.badge{display:inline-block;padding:2px 9px;border-radius:12px;font-size:11px;font-weight:600}.badge.ok{background:#e3f4e6;color:var(--success)}.badge.warn{background:#fdf2e0;color:var(--warning)}.badge.danger{background:#fbe6e8;color:var(--danger)}.badge.neutral{background:#eee;color:#555}.btn{display:inline-block;background:var(--navy);color:#fff;border:none;padding:8px 16px;border-radius:5px;cursor:pointer;font-size:13px;text-decoration:none}.btn:hover{background:var(--navy-light)}.btn.secondary{background:#fff;color:var(--navy);border:1px solid var(--navy)}.btn.secondary:hover{background:var(--navy-bg)}.btn.danger{background:var(--danger)}.btn:disabled{opacity:.5;cursor:not-allowed}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 18px}.form-field{display:flex;flex-direction:column;gap:4px;font-size:13px}.form-field label{font-weight:600;color:#333}.form-field input,.form-field select,.form-field textarea{padding:8px 10px;border:1px solid var(--border);border-radius:5px;font-size:13px;font-family:inherit}.form-field.full{grid-column:1 / -1}.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}.toolbar input,.toolbar select{padding:7px 10px;border:1px solid var(--border);border-radius:5px;font-size:13px}.login-page{display:flex;align-items:center;justify-content:center;height:100vh;background:var(--navy-bg)}.login-box{background:#fff;padding:36px 40px;border-radius:10px;width:360px;box-shadow:0 4px 24px #00000014}.login-box h1{text-align:center}.login-box .logo{text-align:center;margin-bottom:10px;font-size:26px;font-weight:700;color:var(--navy)}.error-text{color:var(--danger);font-size:13px;margin:6px 0}.muted{color:#777;font-size:12px}.readings-table input{width:90px;padding:4px 6px;font-size:12px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:flex;align-items:flex-start;justify-content:center;padding:40px 20px;overflow-y:auto;z-index:50}.modal-box{background:#fff;border-radius:8px;padding:24px 28px;width:100%;max-width:720px}.tabs{display:flex;gap:6px;margin-bottom:14px}.tabs button{padding:7px 14px;border:1px solid var(--border);background:#fff;border-radius:5px;cursor:pointer;font-size:13px}.tabs button.active{background:var(--navy);color:#fff;border-color:var(--navy)}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px}.stat-card{background:#fff;border:1px solid var(--border);border-radius:8px;padding:16px}.stat-card .stat-value{font-size:26px;font-weight:700;color:var(--navy)}.stat-card .stat-label{font-size:12px;color:#666;margin-top:2px}