* { box-sizing: border-box; }
body { font-family: system-ui, -apple-system, sans-serif; margin: 0; color: #1f2430;
       background: #f7f8fb; }
.topbar { display: flex; justify-content: space-between; align-items: center;
          flex-wrap: wrap; gap: .5rem; padding: 1rem 1.5rem; background: #1f2a44; color: #fff; }
.topbar a { color: #fff; text-decoration: none; margin-left: 1rem; }
.brand { font-weight: 700; font-size: 1.1rem; margin: 0; }
.topbar .user { margin-left: 1rem; opacity: .8; }
.btn, .btn-ghost, .btn-small { border: 0; border-radius: 6px; cursor: pointer;
          font: inherit; text-decoration: none; display: inline-block; }
.btn { background: #3b82f6; color: #fff; padding: .5rem 1rem; }
.btn-ghost { border: 1px solid #ffffff55; padding: .35rem .8rem; }
.btn-small { background: #e2e8f0; color: #1f2430; padding: .2rem .6rem; margin-left: .2rem; }
.btn-small.danger { background: #fecaca; }
main { padding: 2rem 1.5rem; max-width: 1000px; margin: 0 auto; }
h1 { margin-top: 0; }
.flash { background: #fff7ed; border: 1px solid #fdba74; border-radius: 8px;
         padding: .75rem 1rem; margin-bottom: 1rem; }
.flash p { margin: .2rem 0; }
.block { background: #fff; border: 1px solid #e5e7eb; border-radius: 10px;
         padding: 1.25rem 1.5rem; margin-bottom: 1.25rem; }
.tiles { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1rem 0 2rem; }
.tile { padding: 1.4rem 2rem; background: #eef2ff; border-radius: 10px;
        text-decoration: none; color: #1f2a44; font-weight: 600; }
.grid { display: grid; gap: 1rem;
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
.card { margin: 0; background: #fff; border: 1px solid #e5e7eb; border-radius: 10px;
        padding: .75rem; text-align: center; }
.card img { width: 100%; height: 160px; object-fit: cover; border-radius: 8px; }
table.data { width: 100%; border-collapse: collapse; margin-top: .5rem; }
table.data th, table.data td { border: 1px solid #e5e7eb; padding: .45rem .6rem;
        text-align: left; }
table.data tfoot th { background: #f1f5f9; }
.stack { display: flex; flex-direction: column; gap: .75rem; max-width: 480px; }
.stack label { display: flex; flex-direction: column; gap: .25rem; font-weight: 600; }
.stack input, .stack select, .stack textarea { padding: .5rem; border: 1px solid #cbd5e1;
        border-radius: 6px; font: inherit; }
.inline { display: inline; }
.check { font-weight: 400; display: block; }
.hint { color: #64748b; font-size: .9rem; }
fieldset { border: 1px solid #e5e7eb; border-radius: 8px; }