@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap";:root{--primary: #6366f1;--primary-hover: #4f46e5;--secondary: #ec4899;--accent: #8b5cf6;--background: #0f172a;--surface: #1e293b;--text: #f8fafc;--text-muted: #94a3b8;--border: #334155;--radius: 12px;--shadow: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,sans-serif;background-color:var(--background);color:var(--text);min-height:100vh;display:flex;flex-direction:column}#root{width:100%}.container{max-width:1200px;margin:0 auto;padding:2rem}.gradient-text{background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;font-weight:800}.card{background:#1e293bb3;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border-radius:var(--radius);font-weight:600;transition:all .2s ease;cursor:pointer;border:none;font-size:1rem}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 4px 14px #6366f163}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px #6366f13b}input[type=number],select{width:100%;padding:.75rem;background:#0f172a80;border:1px solid var(--border);border-radius:var(--radius);color:var(--text);font-size:1rem;margin-top:.5rem;transition:border-color .2s}input[type=number]:focus,select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px #6366f133}.checkbox-group{display:flex;gap:1rem;flex-wrap:wrap}.checkbox-label{display:flex;align-items:center;gap:.5rem;cursor:pointer;-webkit-user-select:none;user-select:none}@media print{body{background-color:#fff;color:#000;-webkit-print-color-adjust:exact;print-color-adjust:exact}.no-print{display:none!important}.container{width:100%;max-width:none;padding:0;margin:0}.worksheet-grid{display:grid!important}.fraction-grid{border:3px solid black!important;background:transparent!important;box-shadow:none!important}.fraction-square{border:1px solid black!important}.fraction-square.filled{background-color:#000!important;background-color:#6366f1!important}}.hero{padding:4rem 1rem;background:radial-gradient(circle at center,rgba(99,102,241,.15),transparent 70%)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;padding:2rem 0}.tool-card{display:flex;flex-direction:column;align-items:center;text-align:center;transition:transform .3s ease,box-shadow .3s ease;height:100%}.tool-card:hover{transform:translateY(-5px);box-shadow:0 20px 25px -5px #0003,0 10px 10px -5px #0000001a;border-color:#6366f14d}.tool-card>*:last-child{margin-top:auto}input::-webkit-outer-spin-button,input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield}