:root {
    color-scheme: light;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: #17212b;
    background: #f2f5f7;
}

* { box-sizing: border-box; }

body { margin: 0; min-height: 100vh; }

.access-shell {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
    background: linear-gradient(135deg, #f7f9fa 0 55%, #e7edf0 55% 100%);
}

.access-panel {
    width: min(100%, 420px);
    padding: 36px;
    background: #fff;
    border: 1px solid #d8e0e4;
    border-radius: 8px;
    box-shadow: 0 18px 50px rgba(23, 33, 43, .12);
}

.brand-mark {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    margin-bottom: 22px;
    background: #17212b;
    color: #fff;
    font-size: 22px;
    font-weight: 800;
}

.eyebrow { margin: 0 0 8px; color: #16724a; font-size: 13px; font-weight: 800; text-transform: uppercase; }
h1 { margin: 0; font-size: 32px; line-height: 1.12; }
.intro { margin: 14px 0 26px; color: #52616b; line-height: 1.55; }
label { display: block; margin-bottom: 8px; font-weight: 750; }
input { width: 100%; min-height: 48px; padding: 10px 12px; border: 1px solid #9aa8b0; border-radius: 6px; font: inherit; }
input:focus { outline: 3px solid rgba(22, 114, 74, .2); border-color: #16724a; }
button { width: 100%; min-height: 48px; margin-top: 14px; border: 0; border-radius: 6px; background: #16724a; color: #fff; font: inherit; font-weight: 800; cursor: pointer; }
button:hover { background: #105c3b; }
.error { margin: 10px 0 0; color: #a12622; font-weight: 700; }
.demo-note { margin: 24px 0 0; color: #71808a; font-size: 12px; line-height: 1.45; }

@media (max-width: 480px) {
    .access-shell { padding: 16px; }
    .access-panel { padding: 28px 22px; }
    h1 { font-size: 28px; }
}