:root { color-scheme: light; font-family: Inter, ui-sans-serif, system-ui, sans-serif; color: #18312b; background: #edf3ef; }
* { box-sizing: border-box; }
body { min-height: 100vh; margin: 0; display: grid; place-items: center; padding: 24px; }
.login-card { width: min(420px, 100%); padding: 42px; background: white; border: 1px solid #d7e2dc; border-radius: 16px; box-shadow: 0 18px 50px #18312b1a; text-align: center; }
.brand { color: #227158; font-weight: 800; letter-spacing: .12em; }
h1 { margin: 12px 0 8px; font-size: 1.8rem; }
p { color: #5a6c66; line-height: 1.5; }
#google-button { min-height: 44px; margin: 28px auto 8px; display: flex; justify-content: center; }
.error { color: #a12626; background: #fff0f0; border-radius: 8px; padding: 10px; }