:root { --ink: #16222e; --accent: #0b6b4f; --bg: #f5f7f9; }
* { box-sizing: border-box; }
body { font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif; margin: 0; color: var(--ink); background: var(--bg); }
header { background: var(--accent); color: #fff; padding: 16px 24px; }
header h1 { margin: 0 0 4px; font-size: 20px; }
header nav a { color: #d7fff0; }
main { padding: 24px; max-width: 880px; }
footer { padding: 16px 24px; color: #5a6b76; font-size: 13px; }
form { display: grid; gap: 12px; max-width: 360px; padding: 24px; }
label { display: grid; gap: 4px; font-size: 14px; }
input { padding: 8px; border: 1px solid #c3ccd3; border-radius: 6px; }
button { padding: 9px 14px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; cursor: pointer; }
code { background: #e9eef1; padding: 1px 5px; border-radius: 4px; }