:root { font-family: "Segoe UI", Arial, sans-serif; color: #171720; background: #f6f6f9; }
* { box-sizing: border-box; }
body { min-width: 320px; min-height: 100vh; min-height: 100dvh; margin: 0; display: grid; place-items: center; padding: 24px; }
.login-card { width: min(440px,100%); padding: 36px; background: #fff; border: 1px solid #e6e6ee; border-radius: 20px; box-shadow: 0 16px 48px rgba(30,24,54,.06); }
.login-brand { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 28px; color: #171720; font-size: 1.8rem; font-weight: 800; letter-spacing: -.06em; text-decoration: none; }
.login-brand span { padding: 5px 7px; border-radius: 5px; color: #6542d7; background: #f0eaff; font-size: .6rem; letter-spacing: .1em; }
h1 { margin: 0; font-size: 1.45rem; letter-spacing: -.03em; line-height: 1.3; }
.login-copy { margin: 10px 0 26px; color: #747485; font-size: .84rem; line-height: 1.5; }
form { display: grid; }
label { margin: 0 0 7px; color: #555565; font-size: .78rem; font-weight: 650; }
input,button { width: 100%; height: 46px; font: inherit; border-radius: 10px; }
input { margin-bottom: 18px; border: 1px solid #dddde6; padding: 0 13px; outline: none; background: #fff; }
input:focus { border-color: #9f87ff; box-shadow: 0 0 0 3px rgba(116,76,255,.1); }
button { margin-top: 4px; border: 0; background: #744cff; color: #fff; font-size: .85rem; font-weight: 700; cursor: pointer; }
button:hover { background: #6540e8; }
button:disabled { opacity: .65; cursor: wait; }
.login-message { min-height: 20px; margin: 12px 0 0; color: #b23c35; font-size: .78rem; line-height: 1.45; }
@media(max-width:480px) { body { padding: 16px; } .login-card { padding: 28px 24px; } }