:root{--primary: #0284c7;--primary-hover: #0369a1;--primary-light: #f0f9ff;--primary-border: #bae6fd;--secondary: #0f172a;--success: #10b981;--success-light: #d1fae5;--warning: #d97706;--warning-light: #fef3c7;--danger: #ef4444;--danger-light: #fee2e2;--bg-main: #f1f5f9;--text-main: #0f172a;--text-muted: #64748b;--card-bg: #ffffff;--card-border: #e2e8f0;--radius-lg: 16px;--radius-md: 10px;--shadow-sm: 0 1px 3px rgba(0,0,0,.05);--shadow-md: 0 4px 12px rgba(0, 0, 0, .05)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-main);color:var(--text-main);min-height:100vh;-webkit-font-smoothing:antialiased}.container{max-width:1160px;margin:0 auto;padding:20px 16px 60px}.app-header{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;background:#fff;border:1px solid var(--card-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);margin-bottom:24px}.brand-logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--primary);font-weight:800;font-size:20px;letter-spacing:-.5px}.nav-links{display:flex;align-items:center;gap:8px}.nav-btn{padding:8px 16px;border-radius:var(--radius-md);border:none;background:transparent;color:var(--text-muted);font-weight:700;font-size:14px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:6px}.nav-btn:hover{background:var(--primary-light);color:var(--primary)}.nav-btn.active{background:var(--primary);color:#fff}.user-menu-dropdown{position:relative}.user-menu-trigger{display:flex;align-items:center;gap:6px;padding:6px 14px;border-radius:var(--radius-md);border:1.5px solid var(--card-border);background:#fff;color:var(--text-main);font-weight:700;font-size:13px;cursor:pointer}.user-menu-trigger:hover{border-color:var(--primary);color:var(--primary)}.user-dropdown-panel{position:absolute;top:100%;right:0;margin-top:8px;width:200px;background:#fff;border:1px solid var(--card-border);border-radius:var(--radius-md);box-shadow:var(--shadow-md);z-index:100;overflow:hidden}.user-dropdown-item{width:100%;padding:10px 14px;display:flex;align-items:center;gap:8px;border:none;background:transparent;font-size:13px;font-weight:600;color:var(--text-main);cursor:pointer;text-align:left}.user-dropdown-item:hover{background:var(--primary-light);color:var(--primary)}.user-dropdown-item.danger{color:var(--danger)}.user-dropdown-item.danger:hover{background:var(--danger-light)}.glass-card{background:#fff;border:1px solid var(--card-border);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-md);margin-bottom:20px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 20px;border-radius:var(--radius-md);font-weight:700;font-size:14px;border:none;cursor:pointer;transition:all .2s ease;text-decoration:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-hover)}.btn-outline{background:#fff;border:1.5px solid var(--card-border);color:var(--text-main)}.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}.btn-sm{padding:6px 12px;font-size:13px}.form-group{margin-bottom:16px}.form-label{display:block;font-size:13px;font-weight:700;color:var(--text-muted);margin-bottom:6px}.form-input,.form-select,.form-textarea{width:100%;padding:10px 14px;border-radius:var(--radius-md);border:1.5px solid var(--card-border);background:#fff;font-size:14px;outline:none;transition:border-color .2s}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px #0284c71f}.level-bar{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}.level-tab-btn{padding:5px 12px;border-radius:var(--radius-md);border:1.5px solid var(--card-border);background:#fff;color:var(--text-main);font-weight:700;font-size:13px;cursor:pointer;white-space:nowrap;transition:all .15s ease}.level-tab-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}.level-tab-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.karaoke-card{padding:20px;border-radius:var(--radius-lg);border:2px solid var(--card-border);background:#fff;margin-bottom:16px;transition:all .3s cubic-bezier(.4,0,.2,1)}.karaoke-card.active-reading{border-color:var(--warning);background:#fffdf5;box-shadow:0 0 16px #d9770633}.karaoke-choice{padding:16px 20px;border-radius:var(--radius-md);border:2px solid var(--card-border);background:#fff;margin-bottom:12px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:space-between}.karaoke-choice:hover{border-color:var(--primary);background:var(--primary-light)}.karaoke-choice.active-reading{border-color:var(--success);background:var(--success-light);box-shadow:0 0 16px #10b98140}.karaoke-choice.selected{border-color:var(--primary);background:var(--primary-light);font-weight:700}.badge-pill{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:700}.badge-warning{background:var(--warning-light);color:#b45309}.badge-success{background:var(--success-light);color:#047857}.data-table{width:100%;border-collapse:collapse;margin-top:12px}.data-table th,.data-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--card-border);font-size:14px}.data-table th{background:#f8fafc;font-weight:700;color:var(--text-muted)}