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#f1f5f9);border-radius:6px;border:1.5px solid var(--border-color, #e2e8f0)}.scroll-hint{font-size:.68rem;color:var(--text-secondary, #94a3b8);text-align:center;line-height:1.4;letter-spacing:.02em}.fretboard-svg{background-color:transparent;border-radius:var(--radius-lg);cursor:crosshair}.vertical-diagram-strip{display:flex!important;flex-direction:row!important;flex-wrap:nowrap!important;align-items:flex-start!important;width:max-content!important}.vertical-diagram-strip .diagram-block{display:inline-flex!important;flex-direction:column!important;flex-shrink:0!important}.mark-text-input{width:80px;height:32px;line-height:normal;background:#000c;border:1px solid var(--accent-primary);color:#fff;text-align:center;border-radius:4px;font-size:14px;font-weight:700;padding:4px;box-sizing:border-box;box-shadow:0 4px 6px #0000004d}.diagram-actions{position:absolute;top:1rem;left:1rem;display:flex;gap:.75rem;z-index:100;-webkit-user-select:none;user-select:none;transition:filter .3s 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h3{margin:0;font-size:1.25rem;color:var(--text-primary);font-weight:700}.close-sidebar-btn{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;padding:.5rem;border-radius:50%;display:flex;transition:background .2s}.close-sidebar-btn:hover{background:var(--bg-tertiary);color:var(--text-primary)}.sidebar-body{padding:1rem;overflow-y:auto;flex:1}.saved-diagrams-list-v2{display:flex;flex-direction:column;gap:.75rem}.diagram-item-v2{display:flex;align-items:center;justify-content:space-between;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1rem;transition:all .2s}.diagram-item-v2:hover{border-color:var(--accent-primary);background:var(--bg-tertiary);transform:translate(-4px)}.diagram-info{flex:1;display:flex;flex-direction:column;cursor:pointer;min-width:0}.diagram-name{font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.diagram-date{font-size:.75rem;color:var(--text-secondary)}.delete-btn{color:#ef4444;background:transparent;border:none;padding:.5rem;cursor:pointer;border-radius:var(--radius-sm);display:flex;transition:all .2s}.delete-btn:hover{background:#ef44441a;transform:scale(1.1)}.empty-state{text-align:center;padding:3rem 1rem;color:var(--text-secondary);font-style:italic;font-size:.95rem}.auth-overlay{position:fixed;inset:0;z-index:4000;display:flex;align-items:center;justify-content:center;padding:1rem;background:#0f172a6b;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.auth-dialog{width:min(390px,100%);padding:1.25rem;background:#fff;border:1px solid #e2e8f0;border-radius:14px;box-shadow:0 24px 70px #0f172a33}.auth-dialog-header{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;margin-bottom:1rem}.auth-dialog-header h2{color:#0f172a;font-size:1.2rem;line-height:1.2}.auth-dialog-header p{margin-top:.3rem;color:#64748b;font-size:.8rem}.auth-close{width:30px;height:30px;display:flex;align-items:center;justify-content:center;flex-shrink:0;background:transparent;border:0;border-radius:6px;color:#64748b}.auth-close:hover{background:#f1f5f9;color:#0f172a}.auth-google-btn,.auth-submit{width:100%;min-height:40px;border-radius:8px;font-size:.88rem;font-weight:700}.auth-google-btn{background:#fff;border:1.5px solid #cbd5e1;color:#334155}.auth-google-btn:hover:not(:disabled){background:#f8fafc;border-color:#94a3b8}.auth-divider{position:relative;margin:1rem 0;color:#94a3b8;font-size:.68rem;text-align:center}.auth-divider:before{content:"";position:absolute;top:50%;left:0;right:0;height:1px;background:#e2e8f0}.auth-divider span{position:relative;padding:0 .55rem;background:#fff}.auth-form{display:flex;flex-direction:column;gap:.75rem}.auth-form label{display:flex;flex-direction:column;gap:.3rem;color:#475569;font-size:.72rem;font-weight:700}.auth-form input{width:100%;min-height:40px;padding:.55rem .65rem;-webkit-user-select:text;user-select:text}.auth-submit{margin-top:.15rem;background:#3b82f6;border:1px solid #3b82f6;color:#fff}.auth-submit:hover:not(:disabled){background:#2563eb}.auth-google-btn:disabled,.auth-submit:disabled,.auth-mode-switch:disabled{cursor:default;opacity:.6}.auth-message{padding:.55rem .65rem;background:#fff7ed;border:1px solid #fed7aa;border-radius:7px;color:#c2410c;font-size:.75rem;line-height:1.35}.auth-mode-switch{width:100%;margin-top:.85rem;padding:.25rem;background:transparent;border:0;color:#2563eb;font-size:.78rem;font-weight:650}