.tool-header{text-align:center;margin-bottom:32px}.header-badge{display:flex;justify-content:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}.badge{background:linear-gradient(135deg, #3b82f6, #1d4ed8);color:white;padding:6px 18px;border-radius:40px;font-size:0.75rem;font-weight:500;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.tool-header h1{font-size:2rem;font-weight:800;background:linear-gradient(135deg, #1e293b, #3b82f6);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:10px}.tool-header p{color:var(--gray-500);font-size:0.95rem}.screen-info-card{background:linear-gradient(135deg, #f8fafc, #fff);border-radius:20px;padding:20px;margin-bottom:24px;border:1px solid var(--gray-200)}.info-header{display:flex;align-items:center;gap:8px;margin-bottom:16px;font-weight:600;color:var(--gray-700)}.info-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px}.info-item{display:flex;flex-direction:column;gap:4px}.info-label{font-size:0.7rem;color:var(--gray-500)}.info-value{font-size:0.9rem;font-weight:600;color:var(--gray-800)}.test-modes{margin-bottom:24px}.mode-title{display:flex;align-items:center;gap:8px;margin-bottom:16px;font-weight:600;color:var(--gray-700)}.mode-buttons{display:flex;flex-wrap:wrap;gap:12px}.mode-btn{background:var(--gray-100);border:1px solid var(--gray-200);padding:14px 24px;border-radius:16px;cursor:pointer;transition:all 0.3s;text-align:center;min-width:120px}.mode-btn i{font-size:1.3rem;display:block;margin-bottom:8px;color:#3b82f6}.mode-btn span{display:block;font-weight:600;margin-bottom:4px}.mode-btn small{font-size:0.65rem;color:var(--gray-500)}.mode-btn.active{background:linear-gradient(135deg, #3b82f6, #1d4ed8);border-color:#3b82f6;color:white}.mode-btn.active i,.mode-btn.active small{color:white}.test-panel{background:var(--gray-50);border-radius:24px;padding:24px;margin-bottom:24px;animation:fadeIn 0.3s ease}.color-palette{text-align:center}.color-title{font-size:0.85rem;color:var(--gray-600);margin-bottom:16px}.color-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(100px, 1fr));gap:12px}.color-box{padding:20px;border-radius:12px;text-align:center;cursor:pointer;font-weight:500;transition:all 0.2s;border:1px solid rgba(0,0,0,0.1)}.color-box:hover{transform:scale(1.02);box-shadow:0 4px 12px rgba(0,0,0,0.15)}.gradient-controls{display:flex;justify-content:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}.gradient-btn{background:white;border:1px solid var(--gray-200);padding:8px 20px;border-radius:40px;cursor:pointer;transition:all 0.2s}.gradient-btn:hover{background:#3b82f6;color:white}.gradient-preview{display:flex;justify-content:center;margin-bottom:20px}#gradientCanvas{border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,0.1)}.grayscale-steps{background:white;border-radius:16px;padding:20px;margin-bottom:20px}.step-row{display:flex;align-items:center;gap:8px;margin-bottom:12px;flex-wrap:wrap}.step-label{width:40px;font-size:0.7rem;font-weight:500;text-align:right}.step-bar{flex:1;height:40px;border-radius:8px}.grayscale-desc{background:#fef3c7;border-radius:12px;padding:12px 16px;font-size:0.8rem;color:#92400e;margin-bottom:20px}.geometry-controls{display:flex;justify-content:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}.geometry-btn{background:white;border:1px solid var(--gray-200);padding:8px 20px;border-radius:40px;cursor:pointer;transition:all 0.2s}.geometry-btn:hover{background:#3b82f6;color:white}.geometry-preview{display:flex;justify-content:center;margin-bottom:20px}#geometryCanvas{background:white;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,0.1)}.text-samples{background:white;border-radius:16px;padding:20px;margin-bottom:20px}.text-sample{margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--gray-200)}.text-sample:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.text-sample h4{margin-bottom:12px;color:var(--gray-700)}.text-sample p{line-height:1.6;color:var(--gray-600)}.text-desc{background:#dbeafe;border-radius:12px;padding:12px 16px;font-size:0.8rem;color:#1e40af;margin-bottom:20px}.fullscreen-btn{background:linear-gradient(135deg, #3b82f6, #1d4ed8);color:white;border:none;padding:12px 28px;border-radius:40px;cursor:pointer;font-weight:500;transition:all 0.3s;width:100%}.fullscreen-btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(59,130,246,0.3)}.fullscreen-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#000;z-index:9999;cursor:pointer}.fullscreen-canvas{width:100%;height:100%;display:block}.fullscreen-controls{position:fixed;bottom:20px;left:0;right:0;display:flex;justify-content:center;align-items:center;gap:20px;z-index:10000}.fullscreen-control-btn{background:rgba(0,0,0,0.7);color:white;border:1px solid rgba(255,255,255,0.2);padding:10px 24px;border-radius:40px;cursor:pointer;font-size:0.9rem;transition:all 0.2s}.fullscreen-control-btn:hover{background:rgba(0,0,0,0.9)}.fullscreen-hint{background:rgba(0,0,0,0.5);color:white;padding:6px 12px;border-radius:20px;font-size:0.7rem}.info-section{margin-top:20px}.divider{display:flex;align-items:center;gap:12px;margin-bottom:16px}.divider span{font-size:0.85rem;font-weight:500;color:var(--gray-600)}.divider::after{content:'';flex:1;height:1px;background:var(--gray-200)}.info-grid-bottom{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px;padding:16px;background:var(--gray-50);border-radius:20px}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:900px){.info-grid{grid-template-columns:repeat(2, 1fr)}.info-grid-bottom{grid-template-columns:repeat(2, 1fr)}.color-grid{grid-template-columns:repeat(auto-fill, minmax(80px, 1fr))}}@media (max-width:768px){.mode-btn{padding:10px 16px;min-width:100px}.info-grid-bottom{grid-template-columns:1fr}.step-row{flex-wrap:wrap}.step-label{width:35px}}