:root { font-family: system-ui, sans-serif; color: #1a1a1a; }
body { margin: 0; background: #f6f7f9; }
main { max-width: 760px; margin: 3rem auto; padding: 0 1rem; }
main.auth { max-width: 360px; }
h1 { font-size: 1.4rem; }
label { display: block; margin: 0.75rem 0; }
input { width: 100%; padding: 0.5rem; border: 1px solid #cbd2d9; border-radius: 6px; box-sizing: border-box; }
button { padding: 0.5rem 1rem; border: 0; border-radius: 6px; background: #128c7e; color: #fff; cursor: pointer; }
.error { color: #b00020; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.topbar button { background: #6b7280; }