.auth-modal[hidden]{display:none!important}
.auth-modal{position:fixed;z-index:1500;inset:0;display:grid;place-items:center;padding:20px;background:rgba(3,8,18,.66);backdrop-filter:blur(8px)}
.auth-card{position:relative;box-sizing:border-box;width:min(420px,100%);max-height:calc(100dvh - 32px);overflow:auto;padding:30px;border:1px solid rgba(130,160,210,.23);border-radius:18px;background:#0d1423;color:#e8edf7;box-shadow:0 28px 80px rgba(0,0,0,.5)}
.auth-card small{color:#55dff7;letter-spacing:.16em}.auth-card h2{margin:.4rem 0}.auth-card>p{color:#9aa8bd;line-height:1.55}.auth-close{position:absolute;top:14px;right:14px;border:0;background:transparent;color:#dce5f5;font-size:1.35rem;cursor:pointer}
.auth-email-form button,.auth-guest,.auth-sign-out{box-sizing:border-box;width:100%;margin-top:10px;padding:12px;border:1px solid rgba(130,160,210,.28);border-radius:10px;background:#121d31;color:#eef4ff;cursor:pointer}.auth-email-form button:hover,.auth-sign-out:hover{border-color:#55dff7}.auth-guest{background:transparent;color:#9aa8bd}
.auth-email-form label{display:block;margin-bottom:6px;font-size:.8rem}.auth-email-form input{box-sizing:border-box;width:100%;padding:12px;border:1px solid rgba(130,160,210,.28);border-radius:10px;background:#0a1120;color:#eef4ff}.auth-status{min-height:1.2em;font-size:.82rem;color:#55dff7}
.auth-signed-out[hidden],.auth-signed-in[hidden]{display:none!important}.auth-user-email{word-break:break-word;color:#55dff7!important}.course-profile-button.is-signed-in,.profile-tool.is-signed-in{color:#63e6b3!important;border-color:rgba(99,230,179,.42)!important}
@media(max-width:680px){
  .course-topbar-inner,.topbar-inner{width:calc(100% - 12px)!important;display:grid!important;grid-template-columns:44px 58px minmax(72px,1fr) 44px 60px;gap:5px!important}
  .course-brand,.brand{width:44px!important;justify-content:center!important;gap:0!important}.course-brand-mark,.brand-mark{width:40px!important;height:40px!important}.course-brand-name,.brand span:last-child,.course-notebook-button,.notebook-tool{display:none!important}
  .course-tool-button,.top-tool,.course-profile-button,.profile-tool{height:40px!important;min-height:40px!important;padding:0 6px!important;font-size:11px!important;white-space:nowrap!important}
  .course-search,.top-search{min-width:0!important;width:100%!important;margin:0!important}.course-search input,.top-search input{height:40px!important;padding:0 9px!important;font-size:12px!important}
  .course-ai-button,.ai-tool{width:44px!important;padding:0!important;font-size:0!important;color:#05111d!important;background:linear-gradient(135deg,#70e8ff,#8fffc7)!important;border-color:transparent!important;box-shadow:0 0 18px rgba(85,223,247,.25)!important}
  .course-ai-button span,.ai-tool span{display:none!important}.course-ai-button:after,.ai-tool:after{content:"AI";font-size:12px;font-weight:800;letter-spacing:.04em}
  .course-profile-button,.profile-tool{width:60px!important;overflow:hidden!important;text-overflow:ellipsis!important}
}
@media(max-width:600px){.auth-modal{align-items:end;padding:0}.auth-card{width:100%;max-height:88dvh;border-radius:18px 18px 0 0;padding:24px}}