@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-accent:#334155;--text-primary:#f8fafc;--text-secondary:#cbd5e1;--text-muted:#94a3b8;--primary-color:#3b82f6;--primary-hover:#2563eb;--secondary-color:#10b981;--secondary-hover:#059669;--danger-color:#ef4444;--glass-bg:#1e293bb3;--glass-border:#ffffff1a;--glass-shadow:0 8px 32px 0 #0000004d;--border-radius:12px;--transition-speed:.3s}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;font-family:Inter,sans-serif;line-height:1.6}.glass-panel{background:var(--glass-bg);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-border);border-radius:var(--border-radius);box-shadow:var(--glass-shadow)}.app-container{flex-direction:column;max-width:1200px;min-height:100vh;margin:0 auto;padding:1rem;display:flex}.header{border-bottom:1px solid var(--glass-border);justify-content:center;align-items:center;margin-bottom:2rem;padding:1.5rem 0;display:flex}.header h1{background:linear-gradient(90deg,#3b82f6,#10b981);-webkit-text-fill-color:transparent;letter-spacing:-.5px;-webkit-background-clip:text;font-size:1.8rem;font-weight:700}.tabs-container{flex-wrap:wrap;justify-content:center;gap:1rem;margin-bottom:2rem;display:flex}.tab-btn{background:var(--bg-secondary);color:var(--text-secondary);border:1px solid var(--glass-border);cursor:pointer;transition:all var(--transition-speed) ease;border-radius:30px;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:.95rem;font-weight:500;display:flex}.tab-btn:hover{background:var(--bg-accent);color:var(--text-primary);transform:translateY(-2px)}.tab-btn.active{background:var(--primary-color);color:#fff;border-color:var(--primary-color);box-shadow:0 4px 12px #3b82f666}.content-area{flex-grow:1;padding:2rem;animation:.4s ease-out fadeIn}.input-group{margin-bottom:1.5rem}.input-group label{color:var(--text-secondary);margin-bottom:.5rem;font-size:.9rem;display:block}.form-control{border:1px solid var(--glass-border);width:100%;color:var(--text-primary);transition:border-color var(--transition-speed);background:#0f172a99;border-radius:8px;padding:.75rem 1rem;font-family:Inter,sans-serif;font-size:1rem}.form-control:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 2px #3b82f633}select.form-control option{background:var(--bg-secondary);color:var(--text-primary)}.btn{background:var(--primary-color);color:#fff;cursor:pointer;transition:all var(--transition-speed);border:none;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;display:flex}.btn:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:0 4px 12px #3b82f64d}.btn-secondary{background:var(--bg-accent)}.btn-secondary:hover{background:var(--text-muted);box-shadow:none}.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;display:grid}.result-card{border-radius:var(--border-radius);background:#10b9811a;border:1px solid #10b9814d;margin-top:1.5rem;padding:1.5rem}.result-title{color:var(--secondary-color);text-transform:uppercase;letter-spacing:1px;margin-bottom:.5rem;font-size:.9rem}.result-value{color:var(--text-primary);font-size:2rem;font-weight:700}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.calc-grid{grid-template-columns:repeat(4,1fr);gap:.5rem;display:grid}.calc-btn{background:var(--bg-accent);color:var(--text-primary);cursor:pointer;transition:background var(--transition-speed);border:none;border-radius:8px;padding:1rem;font-size:1.25rem}.calc-btn:hover{background:var(--text-muted)}.calc-btn.op{background:var(--primary-color);color:#fff}.calc-btn.op:hover{background:var(--primary-hover)}.calc-btn.eval{background:var(--secondary-color);grid-column:span 2}.calc-btn.eval:hover{background:var(--secondary-hover)}.calc-display{text-align:right;border:1px solid var(--glass-border);background:#0f172acc;border-radius:8px;margin-bottom:1rem;padding:1.5rem}.calc-exp{color:var(--text-muted);min-height:1.5rem;margin-bottom:.5rem;font-size:1rem}.calc-res{color:var(--text-primary);font-size:2.5rem;font-weight:600;overflow-x:auto}