:root{--primary-color: #1a237e;--primary-light: #534bae;--accent-color: #2979ff;--success-color: #2e7d32;--danger-color: #d32f2f;--text-main: #37474f;--text-sub: #78909c;--bg-body: #f4f6f8;--bg-card: #ffffff;--border-color: #cfd8dc;--header-height: 40px;--shadow-card: 0 2px 8px rgba(0, 0, 0, .05);--shadow-float: 0 4px 12px rgba(0, 0, 0, .1)}body{margin:0;padding:0;font-family:Roboto,Inter,Helvetica Neue,Arial,sans-serif;-webkit-font-smoothing:antialiased;background-color:var(--bg-body);color:var(--text-main);overflow:hidden}.app-container{display:flex;flex-direction:column;height:100vh;width:100vw}.app-header{height:var(--header-height);background-color:var(--primary-color);color:#fff;display:flex;align-items:center;padding:0 16px;box-shadow:0 2px 4px #0003;z-index:100;flex-shrink:0}.header-logo{font-size:1.2rem;font-weight:700;letter-spacing:.5px;display:flex;align-items:center;gap:12px;line-height:1}.app-body{display:flex;flex:1;overflow:hidden}.graph-area{flex:1;background-color:var(--bg-body);display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding:24px;overflow:auto}.graph-card{background-color:var(--bg-card);padding:24px;border-radius:8px;box-shadow:var(--shadow-float);display:flex;flex-direction:column;align-items:center;margin-bottom:24px}.view-options{width:100%;max-width:840px;display:flex;justify-content:flex-end;gap:16px;margin-bottom:12px}.view-options label{display:flex;align-items:center;font-size:13px;font-weight:500;color:var(--text-sub);cursor:pointer;transition:color .2s}.view-options label:hover{color:var(--primary-color)}.view-options input{margin-right:6px;accent-color:var(--primary-color);cursor:pointer}.sidebar{width:400px;background-color:var(--bg-body);border-left:1px solid var(--border-color);display:flex;flex-direction:column;overflow-y:auto;padding:24px;gap:20px;box-shadow:-4px 0 12px #00000005}.control-card{background-color:var(--bg-card);border-radius:8px;padding:20px;box-shadow:var(--shadow-card);border:1px solid var(--border-color)}.control-card h3{margin:0 0 16px;font-size:14px;font-weight:700;color:var(--primary-color);text-transform:uppercase;letter-spacing:.8px;border-bottom:2px solid #f0f0f0;padding-bottom:10px;display:flex;justify-content:space-between;align-items:center}label.input-label{display:block;font-size:11px;font-weight:700;color:var(--text-sub);margin-bottom:6px;text-transform:uppercase}input[type=text],input[type=number],select{width:100%;padding:10px 12px;border:1px solid var(--border-color);border-radius:6px;font-size:13px;color:var(--text-main);background-color:#fff;transition:all .2s ease;box-sizing:border-box}input:focus,select:focus{outline:none;border-color:var(--accent-color);box-shadow:0 0 0 3px #2979ff26}button{cursor:pointer;font-family:inherit;transition:all .2s ease;border:none}.btn-primary{background-color:var(--primary-color);color:#fff;border-radius:6px;padding:10px 16px;font-weight:600;font-size:13px;box-shadow:0 2px 4px #0000001a}.btn-primary:hover{background-color:var(--primary-light);transform:translateY(-1px);box-shadow:0 4px 8px #00000026}.btn-accent{background-color:var(--accent-color);color:#fff;border-radius:6px;padding:8px 12px;font-weight:600;font-size:12px}.btn-accent:hover{background-color:#1565c0}.btn-success{background-color:var(--success-color);color:#fff;border-radius:6px;padding:8px 12px;font-weight:600;font-size:12px}.btn-success:hover{background-color:#1b5e20}.btn-outline{background-color:transparent;border:1px solid var(--border-color);color:var(--text-main);border-radius:6px;padding:8px 12px;font-size:12px;font-weight:500}.btn-outline:hover{background-color:#f5f5f5;border-color:#bbb}.btn-icon{background:transparent;border:1px solid var(--border-color);border-radius:4px;width:28px;height:28px;display:flex;align-items:center;justify-content:center;color:var(--text-sub);font-size:14px}.btn-icon:hover{background-color:#eceff1;color:var(--primary-color);border-color:var(--primary-color)}.btn-icon.delete:hover{background-color:#ffebee;color:var(--danger-color);border-color:var(--danger-color)}.btn-reset-link{background:none;border:none;color:var(--text-sub);font-size:11px;text-decoration:none;padding:4px;margin-top:12px;display:flex;align-items:center;justify-content:flex-end;width:100%;gap:4px;opacity:.7}.btn-reset-link:hover{color:var(--danger-color);opacity:1;text-decoration:underline}.point-list{display:flex;flex-direction:column;gap:12px}.point-item{background-color:#fafafa;border:1px solid var(--border-color);border-radius:6px;padding:12px;transition:border-color .2s}.point-item:hover{border-color:var(--accent-color)}.point-header{display:flex;gap:10px;margin-bottom:10px;align-items:center}.point-inputs{display:flex;gap:8px;margin-bottom:8px}.point-results{background-color:#fff;border:1px solid #eee;padding:8px 10px;border-radius:4px;font-size:11px;color:var(--text-main);line-height:1.5;font-family:Roboto Mono,monospace}.mixing-tool-container{display:flex;flex-direction:column;gap:12px}.mixing-row{display:flex;gap:8px;align-items:center}.mixing-label{font-size:12px;font-weight:600;color:var(--text-sub)}.mixing-ratio-group{flex:1;display:flex;align-items:center;background-color:#fff;border:1px solid var(--border-color);border-radius:6px;padding:4px 8px}.mixing-ratio-group input{border:none;padding:6px;text-align:right;font-weight:700;color:var(--primary-color)}.mixing-ratio-group input:focus{box-shadow:none}.line-row{display:flex;gap:8px;align-items:center;margin-bottom:10px}.line-list{margin-top:15px;display:flex;flex-direction:column;gap:8px}.line-item{display:flex;justify-content:space-between;align-items:center;background-color:#f8f9fa;border:1px solid var(--border-color);padding:8px 12px;border-radius:4px;font-size:12px}.line-info{display:flex;align-items:center;gap:6px}.arrow-icon{color:var(--text-sub);font-size:14px}.app-footer{background-color:var(--bg-body);color:var(--text-sub);padding:12px 24px;font-size:11px;text-align:center;border-top:1px solid #e0e0e0;flex-shrink:0}.app-footer a{color:var(--text-sub);text-decoration:none;margin:0 8px;transition:color .2s}.app-footer a:hover{color:var(--primary-color);text-decoration:underline}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0009;z-index:200;display:flex;justify-content:center;align-items:center;overflow:hidden}.modal-content{background:#fff;border-radius:10px;max-width:700px;max-height:80vh;padding:30px;box-shadow:var(--shadow-float);position:relative;overflow-y:auto}.modal-header{font-size:1.5rem;font-weight:700;color:var(--primary-color);border-bottom:2px solid #eee;padding-bottom:10px;margin-bottom:20px}.modal-body p,.modal-body li{font-size:13px;line-height:1.6;color:var(--text-main);margin-bottom:10px}.modal-close-btn{position:absolute;top:15px;right:15px;background:none;border:none;font-size:24px;color:var(--text-sub)}.modal-close-btn:hover{color:var(--danger-color)}