:root { color-scheme: dark; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
* { box-sizing: border-box; }
body { min-width: 320px; min-height: 100vh; margin: 0; color: #ecfeff; background: radial-gradient(circle at 65% 5%, rgba(0,229,255,.11), transparent 30%), #03070a; }
.sign-in-shell { width: min(100% - 40px, 560px); margin: auto; padding: clamp(55px, 9vh, 100px) 0 28px; }
.mark { display: grid; place-items: center; width: 50px; height: 50px; border: 1px solid rgba(0,229,255,.42); border-radius: 13px; color: #00e5ff; font-size: 28px; font-weight: 900; box-shadow: inset 0 0 23px rgba(0,229,255,.09); }
.eyebrow { margin: 44px 0 14px; color: #c7a75c; font-size: .875rem; font-weight: 750; letter-spacing: .13em; }
h1 { max-width: 550px; margin: 0; font-family: Georgia, 'Times New Roman', serif; font-size: clamp(2.35rem, 5vw, 3.8rem); font-weight: 550; line-height: 1.13; letter-spacing: -.025em; }
.description { max-width: 510px; margin: 22px 0 30px; color: #b8cad3; font-size: 1.075rem; line-height: 1.65; }
.sign-in-button { display: inline-flex; align-items: center; justify-content: space-between; gap: 56px; min-height: 52px; padding: 0 19px; border-radius: 9px; color: #041018; background: #00e5ff; font-size: 1rem; font-weight: 750; text-decoration: none; }
.sign-in-button:hover, .sign-in-button:focus-visible { background: #7df3ff; }
.sign-in-button:focus-visible { outline: 3px solid #c7a75c; outline-offset: 3px; }
.security-note { max-width: 500px; margin: 25px 0 70px; color: #91a8b5; font-size: .9rem; line-height: 1.55; }
footer { padding-top: 20px; border-top: 1px solid rgba(148,163,184,.18); color: #8ea0ac; font-size: .8rem; line-height: 1.5; }