.color-preview{width:100%;height:120px;border-radius:20px;margin-bottom:30px;position:relative;overflow:hidden;box-shadow:0 4px 20px rgba(0,0,0,0.1)}.preview-overlay{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(transparent, rgba(0,0,0,0.7));padding:16px 24px;display:flex;align-items:center;justify-content:space-between}.preview-overlay span{color:white;font-family:'Fira Code',monospace;font-size:1.1rem;font-weight:600}.copy-color-btn{background:rgba(255,255,255,0.2);border:none;color:white;padding:6px 16px;border-radius:20px;cursor:pointer;font-size:0.8rem;transition:all 0.2s}.copy-color-btn:hover{background:rgba(255,255,255,0.4)}.stats-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px;margin-bottom:30px}.stat-card{background:white;border-radius:20px;padding:20px;display:flex;align-items:center;gap:16px;border:1px solid var(--gray-200);transition:all 0.3s}.stat-card:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(0,0,0,0.1)}.stat-icon{width:50px;height:50px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--primary-color)}.stat-value{font-size:1.2rem;font-weight:700;color:var(--gray-800);word-break:break-all}.stat-label{font-size:0.75rem;color:var(--gray-500)}.direction-tabs{display:flex;gap:12px;margin-bottom:24px;border-bottom:1px solid var(--gray-200);padding-bottom:12px}.direction-btn{background:transparent;border:none;padding:10px 24px;border-radius:40px;cursor:pointer;font-size:0.9rem;transition:all 0.2s;color:var(--gray-600)}.direction-btn i{margin-right:8px}.direction-btn.active{background:var(--primary-color);color:white}.input-section{margin-bottom:24px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:12px}.section-header h3{font-size:1rem;display:flex;align-items:center;gap:8px}.input-actions{display:flex;gap:8px}.hex-input-wrapper{display:flex;align-items:center;gap:8px}.hex-prefix{font-size:1.5rem;font-weight:700;color:var(--gray-500)}.hex-input{flex:1;padding:12px 16px;border:1px solid var(--gray-300);border-radius:12px;font-family:'Fira Code',monospace;font-size:1.1rem;text-transform:uppercase;max-width:200px}.hex-input:focus{outline:none;border-color:var(--primary-color)}.color-picker-btn{background:var(--gray-100);border:1px solid var(--gray-300);padding:10px 16px;border-radius:12px;cursor:pointer;transition:all 0.2s}.color-picker-btn:hover{background:var(--gray-200)}.input-hint{font-size:0.7rem;color:var(--gray-400);margin-top:8px}.rgb-input-group{display:flex;gap:20px;margin-bottom:16px}.rgb-input-item{flex:1;display:flex;align-items:center;gap:10px}.rgb-input-item label{font-weight:700;font-size:1.2rem;min-width:20px}.rgb-input-item .rgb-input{flex:1;padding:10px 12px;border:1px solid var(--gray-300);border-radius:10px;text-align:center;font-family:'Fira Code',monospace;font-size:1rem}.rgb-input-item .rgb-input:focus{outline:none;border-color:var(--primary-color)}.rgb-range{font-size:0.65rem;color:var(--gray-400)}.rgb-sliders{display:flex;flex-direction:column;gap:10px}.slider-item{display:flex;align-items:center;gap:16px}.slider-item label{width:60px;font-weight:500}.slider-item input[type="range"]{flex:1}.slider-item span{min-width:30px;font-weight:600;color:var(--primary-color)}.action-section{display:flex;gap:16px;justify-content:center;margin-bottom:24px}.convert-btn{padding:12px 32px;font-size:1rem}.result-section{background:white;border-radius:20px;border:1px solid var(--gray-200);overflow:hidden;margin-bottom:24px}.result-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:linear-gradient(135deg, var(--gray-50), #fafafa);border-bottom:1px solid var(--gray-200)}.result-header h3{font-size:1rem;display:flex;align-items:center;gap:8px}.result-actions{display:flex;gap:8px}.color-cards{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px;padding:20px}.color-card{background:var(--gray-50);border-radius:16px;padding:16px;text-align:center}.color-swatch{width:60px;height:60px;border-radius:12px;margin:0 auto 12px;border:2px solid white;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.color-label{font-size:0.65rem;color:var(--gray-500)}.color-value{font-family:'Fira Code',monospace;font-size:0.7rem;font-weight:600;word-break:break-all;margin:4px 0}.copy-small{background:transparent;border:none;color:var(--gray-400);cursor:pointer}.copy-small:hover{color:var(--primary-color)}.scheme-section{margin-bottom:24px}.scheme-colors{display:flex;gap:16px;flex-wrap:wrap;margin-top:16px}.scheme-color{width:80px;height:80px;border-radius:16px;cursor:pointer;transition:transform 0.2s;border:2px solid white;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.scheme-color:hover{transform:scale(1.05)}.knowledge-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px;margin-top:20px}.knowledge-card{background:var(--gray-50);border-radius:16px;padding:20px;text-align:center}.knowledge-card i{font-size:28px;color:var(--primary-color);margin-bottom:12px}.knowledge-card h4{font-size:0.85rem;margin-bottom:8px}.knowledge-card p{font-size:0.75rem;color:var(--gray-500);line-height:1.5}@media (max-width:900px){.stats-grid{grid-template-columns:repeat(2, 1fr)}.color-cards{grid-template-columns:repeat(2, 1fr)}.rgb-input-group{flex-direction:column}.knowledge-grid{grid-template-columns:repeat(2, 1fr)}}@media (max-width:600px){.stats-grid{grid-template-columns:1fr}.color-cards{grid-template-columns:1fr}.direction-tabs{flex-wrap:wrap}.action-section{flex-direction:column;align-items:center}.knowledge-grid{grid-template-columns:1fr}}