#design-stages{padding:80px 0;background-color:#f8f9fa}.design-stages-container{max-width:1920px;margin:0 auto;padding:0 15px}.stages-nav{display:flex;justify-content:center;margin-bottom:40px;border-bottom:1px solid #e0e0e0;flex-wrap:wrap}.stage-tab{background:none;border:none;padding:15px 25px;font-size:16px;font-weight:600;color:var(--gray);cursor:pointer;transition:var(--transition);position:relative;border-bottom:3px solid transparent}.stage-tab:hover{color:var(--primary)}.stage-tab.active{color:var(--primary);border-bottom-color:var(--primary)}.stages-content{background:white;border-radius:10px;box-shadow:0 5px 15px rgba(0,0,0,0.05);overflow:hidden}.stage-panel{display:none;padding:40px}.stage-panel.active{display:block;animation:fadeIn 0.5s ease}@keyframes fadeIn{from{opacity:0}to{opacity:1}}.stage-panel h3{font-size:1.8rem;color:var(--primary);margin-bottom:20px}.stage-panel h4{font-size:1.4rem;color:var(--dark);margin:25px 0 15px}.stage-panel h5{font-size:1.2rem;color:var(--dark);margin-bottom:10px}.equipment-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:25px;margin:30px 0}.equipment-item{background:#f8f9fa;border-radius:8px;padding:25px;transition:var(--transition);border-left:4px solid transparent}.equipment-item:hover{transform:translateY(-5px);box-shadow:0 10px 20px rgba(0,0,0,0.1);border-left-color:var(--primary)}.equipment-icon{font-size:2.5rem;color:var(--primary);margin-bottom:15px}.equipment-item h4{font-size:1.2rem;margin-bottom:10px;color:var(--dark)}.equipment-item p{color:var(--gray);line-height:1.5}.calculation-list,.documentation-list{margin:25px 0}.calculation-item,.doc-item{display:flex;align-items:flex-start;margin-bottom:20px;padding:15px;border-radius:8px;transition:var(--transition)}.calculation-item:hover,.doc-item:hover{background:#f8f9fa}.calculation-icon,.doc-icon{font-size:1.5rem;color:var(--primary);margin-right:15px;min-width:40px;text-align:center}.calculation-text h5,.doc-text h5{margin-top:0}.layout-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px;margin:30px 0}.layout-item{display:flex;flex-direction:column;align-items:center;text-align:center;padding:20px;background:#f8f9fa;border-radius:8px;transition:var(--transition)}.layout-item:hover{transform:translateY(-5px);box-shadow:0 10px 20px rgba(0,0,0,0.1)}.layout-icon{font-size:2.5rem;color:var(--primary);margin-bottom:15px}.layout-text h4{margin-top:0}.stage-note{background:#e8f4fd;border-left:4px solid var(--primary);padding:15px 20px;margin-top:30px;border-radius:0 8px 8px 0}.stage-note p{margin:0;color:var(--dark)}.stage-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}.stage-text{display:flex;flex-direction:column}.stage-image{border-radius:10px;overflow:hidden;box-shadow:0 5px 15px rgba(0,0,0,0.1)}.stage-image img{width:100%;height:auto;display:block}@media (max-width:1600px){.design-stages-container{max-width:1400px;padding:0 30px}.stage-panel{padding:35px 30px}.equipment-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}.layout-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}.stage-grid{gap:40px}.stage-tab{padding:14px 20px;font-size:15px}}@media (max-width:1200px){.stage-panel{padding:30px 25px}.stages-nav{flex-direction:row;overflow-x:auto;justify-content:flex-start;border-bottom:1px solid #e0e0e0;padding-bottom:5px;margin-bottom:30px}.stage-tab{border-bottom:3px solid transparent;border-left:none;text-align:center;margin-bottom:0;border-radius:0;white-space:nowrap;flex-shrink:0}.stage-tab.active{border-left-color:transparent;border-bottom-color:var(--primary);background:none}.equipment-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}.layout-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}.stage-grid{grid-template-columns:1fr;gap:30px}.stage-image{order:-1}}@media (max-width:992px){.stage-grid{grid-template-columns:1fr;gap:30px}.stage-image{order:-1}.stage-panel{padding:25px 20px}.equipment-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:15px}.layout-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:15px}.stage-tab{padding:12px 18px;font-size:14px}.calculation-item,.doc-item{padding:12px;margin-bottom:15px}.calculation-icon,.doc-icon{font-size:1.3rem;margin-right:12px;min-width:35px}}@media (max-width:768px){#design-stages{padding:60px 0}.design-stages-container{padding:0 10px}.stage-panel{padding:20px 15px}.stage-panel h3{font-size:1.5rem}.stage-panel h4{font-size:1.3rem}.equipment-grid{grid-template-columns:1fr;gap:15px;margin:20px 0}.equipment-item{padding:20px 15px}.layout-grid{grid-template-columns:1fr;gap:15px;margin:20px 0}.layout-item{padding:15px}.calculation-item,.doc-item{display:flex;align-items:flex-start;margin-bottom:15px;padding:15px 10px;text-align:left}.calculation-icon,.doc-icon{margin-right:15px;margin-bottom:0;font-size:1.3rem;min-width:35px}.stages-nav{margin-bottom:25px}.stage-tab{padding:12px 15px;font-size:14px}}@media (max-width:420px){#design-stages{padding:40px 0}.stage-panel{padding:15px 10px}.stage-panel h3{font-size:1.4rem;margin-bottom:15px}.stage-panel h4{font-size:1.2rem;margin:20px 0 12px}.equipment-grid{grid-template-columns:1fr;gap:12px;margin:15px 0}.equipment-item{padding:15px 12px;margin-bottom:0}.equipment-icon{font-size:2rem;margin-bottom:12px}.layout-grid{grid-template-columns:1fr;gap:12px;margin:15px 0}.layout-item{padding:12px}.layout-icon{font-size:2rem;margin-bottom:12px}.calculation-item,.doc-item{display:flex;align-items:flex-start;padding:12px 8px;margin-bottom:12px;text-align:left}.calculation-icon,.doc-icon{margin-right:12px;margin-bottom:0;font-size:1.2rem;min-width:30px}.stage-note{padding:12px 15px;margin-top:20px}.stages-nav{margin-bottom:20px}.stage-tab{padding:10px 12px;font-size:13px}}@media (max-width:360px){.stage-panel{padding:12px 8px}.stage-panel h3{font-size:1.3rem}.stage-panel h4{font-size:1.1rem}.equipment-item{padding:12px 10px}.layout-item{padding:10px}.stage-tab{padding:8px 10px;font-size:12px}.calculation-item,.doc-item{padding:10px 6px;margin-bottom:10px}.calculation-icon,.doc-icon{margin-right:10px;font-size:1.1rem;min-width:25px}}