:root { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #202a28; background: #f7f8f3; line-height: 1.55; color-scheme: light dark; }
* { box-sizing: border-box; }
body { margin: 0; padding: 24px 18px; }
main { max-width: 620px; margin: 5vh auto; padding: clamp(24px, 5vw, 48px); background: #fff; border: 1px solid #dbe0d7; border-radius: 20px; }
.brand { font-weight: 650; letter-spacing: .05em; color: #426947; margin: 0 0 24px; }
h1 { font-size: clamp(1.7rem, 5vw, 2.2rem); line-height: 1.2; overflow-wrap: anywhere; }
.boundary { background: #fff5d5; border-radius: 10px; padding: 14px; font-weight: 600; }
.explanation, .small { color: #53615a; }
.small { font-size: .87rem; margin-top: 28px; }
fieldset { border: 0; padding: 0; margin: 24px 0; }
legend { font-weight: 600; margin-bottom: 12px; }
label { display: flex; align-items: start; gap: 12px; padding: 14px; margin: 8px 0; border: 1px solid #ccd7cb; border-radius: 8px; overflow-wrap: anywhere; }
input { width: 20px; height: 20px; flex: 0 0 20px; margin: 2px 0 0; accent-color: #31583b; }
button { border: 0; border-radius: 9px; padding: 14px 22px; width: 100%; background: #31583b; color: #fff; font: inherit; font-weight: 600; cursor: pointer; }
button:disabled { opacity: .6; cursor: wait; }
button:focus-visible, input:focus-visible, a:focus-visible { outline: 3px solid #8d6f00; outline-offset: 4px; }
a { color: #31583b; font-weight: 600; }
[hidden] { display: none !important; }
@media (prefers-color-scheme: dark) { :root { background: #17201b; color: #e5ece4; } main { background: #202c24; border-color: #445246; } .brand { color: #abcea1; } .boundary { background: #443d20; } .explanation, .small { color: #c0cbbf; } label { border-color: #61705e; } button { background: #a9d09d; color: #16231a; } a { color: #a9d09d; } }