:root { --accent: #1f4e79; --ink: #1c2430; --muted: #5b6573; --line: #d5dae1; --bg: #fafaf8; --err: #a12622; --radius: 6px; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 40rem; margin: 0 auto; padding: 1.25rem 1rem 2rem; }
.brand { font-weight: 700; color: var(--accent); margin: 0 0 1rem; }
.brand a { color: inherit; text-decoration: none; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: 0 0 .75rem; }
h2 { font-size: 1.3rem; line-height: 1.3; margin: 2.25rem 0 .5rem; }
h3 { font-size: 1rem; margin: 1rem 0 .25rem; color: var(--muted); }
.lead { margin: 0 0 1.25rem; }
blockquote { margin: 0; padding: .75rem 1rem; border-left: 3px solid var(--accent); background: #fff; border-radius: var(--radius); }
form.signup { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; }
label { display: block; font-weight: 600; margin: .75rem 0 .25rem; }
label.check { font-weight: 400; display: flex; gap: .5rem; align-items: flex-start; }
label.check input { margin-top: .35rem; }
input[type=email], select { width: 100%; padding: .65rem .75rem; font: inherit; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
input:hover, select:hover { border-color: var(--muted); }
input:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
button { width: 100%; margin-top: 1rem; padding: .8rem 1rem; font: inherit; font-weight: 600; color: #fff; background: var(--accent); border: 0; border-radius: var(--radius); cursor: pointer; }
button:hover { filter: brightness(1.15); }
button:active { filter: brightness(.9); }
button:disabled { opacity: .6; cursor: progress; }
.error, .status { color: var(--err); margin: .25rem 0 0; min-height: 0; }
.error:empty, .status:empty { display: none; }
.success { margin: 0; font-weight: 600; color: var(--accent); }
.hint { color: var(--muted); font-size: .9rem; margin: .75rem 0 0; }
a { color: var(--accent); }
footer { max-width: 40rem; margin: 0 auto; padding: 1rem; display: flex; gap: 1.25rem; flex-wrap: wrap; border-top: 1px solid var(--line); font-size: .9rem; }