body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: #f6f6f4; font: 14px/1.5 "Inter", ui-sans-serif, system-ui, "PingFang SC", "Noto Sans SC", sans-serif; color: #18181b; }
.card { width: 320px; background: #fff; border: 1px solid #e4e4e0; border-radius: 12px; padding: 28px; box-shadow: 0 8px 30px rgba(0,0,0,.05); display: flex; flex-direction: column; gap: 12px; }
h1 { margin: 0; font-size: 18px; }
p { margin: -8px 0 6px; color: #71717a; font-size: 13px; }
input { font: inherit; border: 1px solid #e4e4e0; border-radius: 6px; padding: 8px 10px; outline: none; }
input:focus { border-color: #1f4fd8; box-shadow: 0 0 0 3px #e8eefc; }
button { font: inherit; background: #18181b; color: #fff; border: 0; border-radius: 6px; padding: 9px; cursor: pointer; }
.err { color: #b91c1c; font-size: 13px; }