/* compact reset (approximates Tailwind Preflight for what Sidoku relies on) */
*,*::before,*::after{box-sizing:border-box;}
*{margin:0;}
body{min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;}
h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit;}
ul,ol{list-style:none;padding:0;}
a{color:inherit;text-decoration:inherit;}
button,input,select,textarea{font:inherit;color:inherit;}
img,svg{display:block;max-width:100%;}
hr{border:0;border-top:1px solid currentColor;}
table{border-collapse:collapse;}

/* utility classes used inline in index.html (flattened from Tailwind) */
.flex{display:flex;}
.flex-col{flex-direction:column;}
.flex-wrap{flex-wrap:wrap;}
.grow{flex-grow:1;}
.inline-block{display:inline-block;}
.block{display:block;}
.float-right{float:right;}
.clear-none{clear:none;}
.items-center{align-items:center;}
.justify-center{justify-content:center;}
.content-center{align-content:center;}
.align-bottom{vertical-align:bottom;}
.overflow-hidden{overflow:hidden;}
.hidden{display:none;}
.italic{font-style:italic;}
.font-bold{font-weight:700;}
.font-light{font-weight:300;}
.text-center{text-align:center;}
.border-separate{border-collapse:separate;}
.min-h-svh{min-height:100svh;}
.min-w-full{min-width:100%;}
.h-full{height:100%;}
.mx-auto{margin-left:auto;margin-right:auto;}
.bg-gradient-to-r{background-image:linear-gradient(to right,var(--tw-grad-from,transparent),var(--tw-grad-to,transparent));}
.from-violet-600{--tw-grad-from:#7c3aed;}
.to-indigo-600{--tw-grad-to:#4f46e5;}
.from-red-400{--tw-grad-from:#f87171;}
.to-green-600{--tw-grad-to:#16a34a;}
.border-blue-800{border-color:#1e40af;}
.bg-orange-200{background-color:#fed7aa;}
.bg-sky-500{background-color:#0ea5e9;}
.bg-indigo-300{background-color:#a5b4fc;}
.bg-white{background-color:#fff;}
.bg-slate-400{background-color:#94a3b8;}
.bg-slate-500{background-color:#64748b;}
.bg-slate-600{background-color:#475569;}
.bg-red-300{background-color:#fca5a5;}
.text-blue-950{color:#172554;}
.text-white{color:#fff;}
.text-red-300{color:#fca5a5;}
.text-slate-300{color:#cbd5e1;}
.text-slate-400{color:#94a3b8;}
.text-sm{font-size:0.875rem;line-height:1.25rem;}
.text-3xl{font-size:1.875rem;line-height:2.25rem;}
.text-5xl{font-size:3rem;line-height:1;}
.p-1{padding:0.25rem;}
.p-2{padding:0.5rem;}
.p-4{padding:1rem;}
.p-5{padding:1.25rem;}
.p-6{padding:1.5rem;}
.py-8{padding-top:2rem;padding-bottom:2rem;}