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768px){.dash-body{padding:1rem}.dash-info-card{flex-direction:column;text-align:center}.dash-image{width:100%;max-width:250px}.dash-greeting{font-size:1.8rem}.dash-upload-section{width:90%}}.excel-visualizer{font-family:Arial,sans-serif}.upload-section{display:flex;flex-direction:column;align-items:center;padding:2rem;background-color:#fff;border:2px dashed #90caf9;border-radius:12px;margin-bottom:2rem;transition:background-color .3s ease;max-width:600px;margin:0 auto 2rem}.upload-section:hover{background-color:#f1faff}.upload-text{font-size:1.1rem;font-weight:600;color:#1976d2;margin-top:1rem;margin-bottom:1rem}input[type=file]{border:none;padding:10px 12px;font-size:1rem;color:#333;background-color:#e3f2fd;border-radius:8px;cursor:pointer;width:100%;max-width:400px;transition:background-color .2s ease}input[type=file]:hover{background-color:#bbdefb}.upload-button{margin-top:1rem;padding:10px 20px;background-color:#1976d2;color:#fff;font-weight:700;border:none;border-radius:8px;cursor:pointer;font-size:1rem;transition:background-color .3s ease}.upload-button:hover{background-color:#1565c0}.select-section{display:flex;justify-content:center;gap:2rem;margin-bottom:2rem;background-color:#fff;padding:1.5rem;border-radius:12px;box-shadow:0 4px 12px #00000014;max-width:800px;margin-left:auto;margin-right:auto}.select-section label{font-size:1rem;font-weight:600;color:#333;display:flex;flex-direction:column;align-items:flex-start}.dropdown{margin-top:.5rem;padding:10px 12px;font-size:1rem;border:1px solid #ccc;border-radius:8px;background-color:#f5f5f5;min-width:200px;transition:border .3s ease,background-color .3s ease}.dropdown:focus{outline:none;border-color:#1976d2;background-color:#e3f2fd}.chart-container{display:flex;flex-wrap:wrap;gap:2rem;justify-content:start}.chart-box{width:500px;background-color:#fff;padding:1rem;margin-left:10rem;border-radius:12px;box-shadow:0 0 10px #0000001a}.download-btn{margin-top:10px;padding:6px 12px;background-color:#388e3c;color:#fff;border:none;border-radius:6px;cursor:pointer}.download-btn:hover{background-color:#2e7d32}@media (max-width: 480px){.excel-visualizer{max-width:300px}.chart-box{width:250px}}.three-d-toggle{align-self:flex-end;padding:12px 24px;background:linear-gradient(135deg,#1976d2,#64b5f6);color:#fff;border:none;border-radius:12px;font-weight:700;cursor:pointer;box-shadow:0 4px 15px #1976d24d;transition:all .3s cubic-bezier(.175,.885,.32,1.275);display:flex;align-items:center;gap:8px}.three-d-toggle:hover{transform:translateY(-2px);box-shadow:0 6px 20px #1976d266}.three-d-toggle.active{background:linear-gradient(135deg,#43a047,#81c784);box-shadow:0 4px 15px #43a0474d}.chart-box.three-d-mode{transform-style:preserve-3d;perspective:1000px;transition:all .6s ease;background:#ffffffe6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.3)}.chart-box.three-d-mode:hover{transform:rotateX(5deg) rotateY(-5deg) translateZ(10px)}.dashboard-container{display:flex;height:100vh;font-family:Arial,sans-serif;background:#f1f5f9}.sidebar{width:250px;background:#1e3a8a;color:#fff;display:flex;flex-direction:column;padding:20px}.sidebar h2{font-size:1.4rem;margin-bottom:20px;color:#fff}.sidebar a{color:#cbd5e1;text-decoration:none;margin:10px 0;font-size:1rem;padding:10px;border-radius:6px;transition:background .3s ease}.sidebar a:hover{background:#2563eb;color:#fff}.sidebar a.active{background:#3b82f6;color:#fff}.main-content{flex:1;overflow-y:auto}.admin-content{background:#fff;border-radius:12px;padding:30px;box-shadow:0 4px 12px #0000001a}.admin-content h1{font-size:2rem;color:#1e3a8a;margin-bottom:15px}.admin-content p{font-size:1rem;color:#475569;line-height:1.6}.navbar{display:flex;justify-content:space-between;align-items:center;background:#1e3a8a;color:#fff;padding:15px 20px;position:sticky;top:0;z-index:1000}.navbar-title{font-size:1.5rem;font-weight:700}.user-icon{cursor:pointer;font-size:1.4rem;padding:8px;border-radius:50%;background:#3b82f6;color:#fff}.user-icon:hover{background:#2563eb}.user-profile{position:absolute;top:60px;right:20px;background:#fff;border:1px solid #ddd;box-shadow:0 4px 12px #0000001a;border-radius:8px;padding:10px 15px;z-index:2000;width:220px}.user-profile p{margin:6px 0;font-size:.95rem}.user-profile button{width:100%;padding:8px;background:#ef4444;color:#fff;border:none;border-radius:6px;cursor:pointer;margin-top:10px}.user-profile button:hover{background:#dc2626}@media (max-width: 768px){.navbar-title,.user-icon{font-size:1rem}.dashboard-container{flex-direction:column}.admin-content h1{font-size:1.5rem}.sidebar{width:220px;display:flex;overflow-x:auto}.sidebar a{flex:1;margin:0}}@media (max-width:480px){.sidebar{width:200px}}.history-dashboard-container{display:flex;height:100vh;background-color:#f4f6f9;font-family:Segoe UI,sans-serif}.history-main-content{flex:1;display:flex;flex-direction:column;overflow:auto}.history-body{padding:2rem}.history-title{font-size:1.8rem;color:#1e3a8a;margin-bottom:1.5rem}.history-list{list-style:none;padding:0;margin:0}.history-item{background-color:#fff;border-radius:8px;padding:1rem 1.5rem;margin-bottom:1rem;box-shadow:0 2px 6px #0000000d;transition:background-color .3s ease}.history-item:hover{background-color:#f0f0f0}.history-item p{margin:.3rem 0;color:#444}.no-history{font-size:1rem;color:#777}