.auth-page{max-width:1000px;margin:0 auto;padding:42px 28px 24px}.login-page{max-width:540px}.auth-card{padding:32px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.auth-card h1{font-size:30px;letter-spacing:-.7px}.auth-intro{font-size:14px;color:var(--muted);margin-top:13px;line-height:1.75}.auth-form{display:flex;flex-direction:column;align-items:stretch;margin-top:24px}.auth-form label{font-size:13px;font-weight:650;margin-bottom:7px}.auth-form input{width:100%;border:1px solid #dce2d3;border-radius:9px;background:#fcfdf9;padding:11px 12px;font-size:15px;margin-bottom:19px;min-width:0}.auth-form input:focus{background:white}.auth-form input[aria-describedby]{margin-bottom:7px}.auth-hint{color:var(--muted);font-size:12px;line-height:1.7}.auth-form .auth-hint{margin-bottom:20px}.optional-label{display:block;color:var(--muted);font-size:11px;font-weight:400;margin-top:3px}.auth-button{border:1px solid var(--green);background:var(--green);color:white;border-radius:9px;padding:11px 17px;font-size:13px;font-weight:650;margin-top:3px}.auth-button:hover:not(:disabled){background:#447c1c}.auth-message{font-size:13px;line-height:1.7;color:#97492f;background:#fff3ed;border:1px solid #f3dace;border-radius:9px;padding:12px 14px;margin-top:19px;overflow-wrap:anywhere}.auth-message.is-success{color:#386a19;background:var(--pale);border-color:#dae9ce}.auth-footer{font-size:11px;color:var(--muted);text-align:center;margin:24px 0 0}.account-heading{margin-bottom:26px}.account-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}.account-nav{display:flex;align-items:center;gap:17px;justify-content:flex-end;margin-left:auto;flex-wrap:wrap;font-size:12px}.account-nav a{text-decoration:none;white-space:nowrap}.account-nav a:hover{text-decoration:underline}.account-username{font-weight:650;max-width:180px;text-overflow:ellipsis;overflow:hidden;white-space:nowrap}.account-logout{border:1px solid var(--line);background:white;border-radius:7px;padding:5px 10px;color:var(--muted);font-size:12px;white-space:nowrap}.account-logout:hover:not(:disabled){border-color:#c8d2bc;color:var(--green)}.account-header .centrum-logo{margin-left:0;flex-shrink:0}.mfa-state{font-size:13px;background:var(--pale);border-radius:9px;color:var(--green);padding:11px 13px;margin-top:19px}.mfa-enrollment{border-top:1px solid var(--line);margin-top:24px;padding-top:20px}.mfa-instructions{padding-left:20px;margin:0 0 17px;font-size:13px;color:var(--muted);line-height:1.75}.mfa-instructions li+li{margin-top:9px}.mfa-secret{display:block;background:var(--cream);border:1px solid var(--line);border-radius:9px;padding:12px;font-size:15px;letter-spacing:1px;overflow-wrap:anywhere;margin-top:7px;user-select:all}.auth-text-link{display:inline-block;font-size:12px;margin-top:13px;line-height:1.7}.mfa-help{margin-top:23px}
@media(max-width:850px){.account-header{height:auto;min-height:104px;gap:20px;flex-wrap:wrap}.account-header .centrum-logo{margin-left:auto}.account-header .account-nav{order:3;flex-basis:100%;justify-content:flex-start;margin:0;padding:0 0 10px}.account-grid{gap:18px}.auth-card{padding:26px}}
@media(max-width:640px){.auth-page{padding:27px 15px 20px}.auth-card{padding:25px 22px;border-radius:18px}.auth-card h1{font-size:27px}.account-grid{grid-template-columns:1fr}.account-nav{gap:13px}.account-username{max-width:140px}.account-header{min-height:85px}.auth-intro{font-size:13px}.auth-form input{font-size:16px}.auth-footer{font-size:10px}}
.invite-page{max-width:600px}.invite-loading{margin-top:20px}.invite-identity{background:var(--pale);border:1px solid #dfe9d4;border-radius:11px;margin:23px 0 12px;padding:15px 17px;display:flex;flex-direction:column;gap:9px}.invite-identity>div{display:grid;grid-template-columns:145px minmax(0,1fr);gap:13px;font-size:12px}.invite-identity dt{color:var(--muted)}.invite-identity dd{margin:0;font-weight:650;overflow-wrap:anywhere}.invite-mfa{border-top:1px solid var(--line);padding-top:23px;margin:3px 0 20px}.invite-mfa h2{font-size:19px}.invite-mfa .auth-intro{font-size:13px;margin-top:10px}.invite-mfa>.auth-button{margin-top:17px}.invite-mfa label{display:block;font-size:13px;font-weight:650;margin-bottom:7px}.invite-mfa .invite-secret-label{margin-bottom:0}.invite-mfa .invite-setup-hint{margin-top:14px;margin-bottom:17px}.invite-help{margin-top:19px}.invite-page #invite-form-message{margin-top:0;margin-bottom:17px}.invite-page #invite-submit{margin-top:2px}
@media(max-width:640px){.invite-identity{padding:14px}.invite-identity>div{grid-template-columns:1fr;gap:2px}.invite-mfa h2{font-size:18px}.invite-mfa .auth-intro{font-size:12px}}
/* A signed-in client can arrive before the first course assignment. */
.auth-button.secondary{background:var(--paper);color:var(--green);border-color:#c8d9bc}.auth-button.secondary:hover:not(:disabled){background:var(--pale);color:var(--green)}.mfa-disable-form{border-top:1px solid var(--line);padding-top:21px}
.empty-library { max-width: 720px; margin: 40px auto; }