:root { font-family: Inter, ui-sans-serif, system-ui, sans-serif; color: #172033; background: #f5f7fb; font-synthesis: none; }
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; }
button, a { font: inherit; }
.shell { min-height: 100vh; max-width: 760px; margin: auto; padding: 0 24px; }
.header { height: 76px; display: flex; align-items: center; justify-content: space-between; }
.brand { color: #172033; font-size: 1.15rem; font-weight: 750; text-decoration: none; letter-spacing: -.02em; }
.text-button { border: 0; background: transparent; color: #536176; cursor: pointer; padding: 8px; }
.card { margin: 10vh auto 0; max-width: 440px; padding: 40px; background: white; border: 1px solid #e3e8f0; border-radius: 16px; box-shadow: 0 14px 40px #1720330b; }
.auth-card { text-align: center; }
h1 { margin: 10px 0 12px; font-size: clamp(1.7rem, 4vw, 2.25rem); letter-spacing: -.04em; }
p { line-height: 1.6; }
.muted { color: #657286; }
.small { font-size: .875rem; }
.eyebrow { color: #536fc4; font-size: .75rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.google-button, .secondary-button { width: 100%; min-height: 48px; border-radius: 9px; cursor: pointer; font-weight: 650; }
.google-button { margin-top: 22px; border: 1px solid #ccd4e0; color: #172033; background: #fff; }
.google-button:hover { background: #f8fafc; border-color: #9ba8bb; }
.google-button span { margin-right: 10px; color: #4285f4; font-weight: 800; }
.secondary-button { margin-top: 20px; border: 0; background: #edf1f8; color: #344563; }
.error { padding: 10px 12px; border-radius: 8px; color: #a32d2d; background: #fff0f0; font-size: .9rem; }
.profile { margin-top: 24px; padding: 14px; border-radius: 8px; background: #f5f7fb; color: #536176; }
@media (max-width: 480px) { .shell { padding: 0 16px; } .card { padding: 28px 22px; } }