* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; line-height: 1.55; color: #1c2430; background: #f5f7fa; }
header, main, footer { max-width: 860px; margin: 0 auto; padding: 1rem 1.25rem; }
header { padding-top: 1.5rem; }
header h1 { margin: 0 0 .25rem; font-size: 1.6rem; }
header p { margin: 0; color: #4a5565; }
nav { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; margin-top: .75rem; }
nav a { color: #0b4f8a; font-weight: 600; }
h2 { font-size: 1.25rem; margin-top: 1.75rem; }
h3 { font-size: 1.05rem; margin-top: 1.25rem; }
.panel { background: #fff; border: 1px solid #d7dde5; border-radius: 8px; padding: 1.1rem 1.25rem; margin: 1rem 0; }
label { display: block; font-weight: 600; margin: .8rem 0 .25rem; }
select, input { width: 100%; padding: .55rem .6rem; font-size: 1rem; border: 1px solid #aab4c2; border-radius: 6px; background: #fff; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1rem; }
button { margin-top: 1rem; padding: .6rem 1.2rem; font-size: 1rem; font-weight: 600; color: #fff; background: #0b4f8a; border: 0; border-radius: 6px; cursor: pointer; }
button.secondary { color: #0b4f8a; background: #e6eef6; }
button:focus, select:focus, input:focus, a:focus { outline: 3px solid #f0a800; outline-offset: 1px; }
.result-label { margin: 0; color: #4a5565; font-weight: 600; }
.result-value { margin: 0 0 .5rem; font-size: 2rem; font-weight: 700; color: #0b4f8a; }
.error { color: #9b1c1c; font-weight: 600; }
table { width: 100%; border-collapse: collapse; margin: .75rem 0; background: #fff; font-size: .95rem; }
th, td { border: 1px solid #d7dde5; padding: .45rem .6rem; text-align: left; vertical-align: top; }
th { background: #eaf0f6; }
tr.current td { background: #fff4d6; font-weight: 600; }
.table-wrap { overflow-x: auto; }
.note { font-size: .92rem; color: #4a5565; }
footer { border-top: 1px solid #d7dde5; margin-top: 2rem; font-size: .9rem; color: #3b4656; }
footer p { margin: .5rem 0; }
.disclaimer { font-weight: 600; }
@media (max-width: 560px) { .row { grid-template-columns: 1fr; } }