*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #007bff;--primary-dark: #0056b3;--danger: #dc3545;--success: #28a745;--warning: #ffc107;--bg: #0f1117;--surface: #1a1d27;--surface2: #22253a;--border: #2e3248;--text: #e8eaf6;--text-muted: #8b8fa8;--sidebar-w: 220px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);font-size:14px}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit;font-size:14px}input,select,textarea{font-family:inherit;font-size:14px}.layout{display:flex;min-height:100vh}.main-content{flex:1;margin-left:var(--sidebar-w);padding:32px;min-height:100vh}.sidebar{width:var(--sidebar-w);background:var(--surface);border-right:1px solid var(--border);position:fixed;top:0;left:0;height:100vh;display:flex;flex-direction:column;padding:24px 0;z-index:100}.sidebar-logo{font-size:20px;font-weight:700;color:var(--primary);padding:0 20px 24px;border-bottom:1px solid var(--border)}.sidebar-nav{flex:1;padding:16px 0}.sidebar-nav a{display:flex;align-items:center;gap:10px;padding:10px 20px;color:var(--text-muted);transition:all .15s;border-left:3px solid transparent}.sidebar-nav a:hover{color:var(--text);background:var(--surface2)}.sidebar-nav a.active{color:var(--primary);background:#007bff14;border-left-color:var(--primary)}.sidebar-footer{padding:16px 20px;border-top:1px solid var(--border)}.btn-logout{width:100%;padding:8px;background:transparent;border:1px solid var(--border);color:var(--text-muted);border-radius:6px;transition:all .15s}.btn-logout:hover{border-color:var(--danger);color:var(--danger)}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.page-title{font-size:22px;font-weight:700}.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-bottom:32px}.card{background:var(--surface);border:1px solid 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var(--border);border-radius:16px;padding:40px;width:360px}.login-title{font-size:24px;font-weight:700;text-align:center;margin-bottom:8px}.login-sub{color:var(--text-muted);text-align:center;margin-bottom:28px;font-size:13px}.form-group{margin-bottom:16px}.form-label{display:block;margin-bottom:6px;color:var(--text-muted);font-size:13px}.form-input{width:100%;padding:10px 14px;background:var(--surface2);border:1px solid var(--border);color:var(--text);border-radius:8px;outline:none}.form-input:focus{border-color:var(--primary)}.btn-block{width:100%;justify-content:center;padding:11px;font-size:15px}.error-msg{color:#f06674;text-align:center;margin-top:12px;font-size:13px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:200}.modal{background:var(--surface);border:1px solid 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