* { box-sizing: border-box; }
:root { color-scheme: light dark; font-family: system-ui, sans-serif; color: #203c34; background: #f6f8f3; }
body { max-width: 960px; margin: auto; padding: 32px; }
header, nav, footer { display: flex; align-items: center; gap: 24px; }
header { justify-content: space-between; }
a { color: inherit; text-underline-offset: 4px; }
.brand { font-size: 26px; font-weight: 750; text-decoration: none; }
.brand span { color: #237a62; }
main { padding: 80px 0; max-width: 680px; min-height: 70vh; }
h1 { font-size: clamp(42px, 7vw, 72px); line-height: 1.08; letter-spacing: -0.05em; margin: 20px 0 28px; }
p { line-height: 1.65; }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: 0.12em; }
.intro { font-size: 21px; margin-bottom: 32px; }
.button, button { display: inline-block; border: 1px solid #b6c7bb; border-radius: 10px; padding: 12px 20px; font: inherit; cursor: pointer; text-decoration: none; background: transparent; color: inherit; }
.button { background: #237a62; color: white; border-color: #237a62; }
button:disabled { opacity: 0.55; cursor: wait; }
:focus-visible { outline: 3px solid #237a62; outline-offset: 4px; }
.hint, footer, #status { font-size: 14px; color: #52685d; }
.examples, .panel { margin-top: 40px; padding: 20px 24px; border: 1px solid #cbd7ca; border-radius: 16px; }
.examples p { margin: 12px 0; }
.danger { color: #a62b28; border-color: currentColor; }
[hidden] { display: none !important; }
@media (max-width: 520px) { body { padding: 24px; } main { padding: 56px 0; } nav { gap: 12px; } }
@media (prefers-color-scheme: dark) { :root { color: #e1ece4; background: #14211c; } .hint, footer, #status { color: #adbdaf; } .danger { color: #ffaaa5; } .panel, .examples, button { border-color: #4e6357; } }