.entry-gate{position:fixed;inset:0;z-index:20;display:none;place-items:center;padding:20px;background:radial-gradient(circle at 80% 10%,#dff3f5,transparent 34%),linear-gradient(145deg,#f7fbfb,#fff7e8)}.entry-gate.show{display:grid}.entry-card{width:min(520px,100%);max-height:calc(100vh - 32px);overflow:auto;background:rgba(255,255,255,.94);border:1px solid var(--line);border-radius:30px;padding:clamp(26px,6vw,48px);box-shadow:var(--shadow);text-align:center}.entry-mark{display:grid;place-items:center;width:64px;height:64px;margin:0 auto 18px;border-radius:50%;background:var(--navy);color:#ffd58a;font-size:30px}.entry-card h1{font-family:"Noto Serif TC",serif;color:var(--navy);font-size:clamp(1.7rem,6vw,2.5rem);margin:4px 0 10px}.entry-card>p:not(.eyebrow){color:#647c87;line-height:1.7}.entry-card form{text-align:left}.entry-card form .primary{display:block;width:100%;margin-top:26px}.form-message{min-height:1.5em;color:#b05d51;font-size:.9rem;line-height:1.5}.trial-hint{display:flex;flex-direction:column;gap:5px;margin:24px 0 12px;padding:15px;border-radius:14px;background:#fff5df;color:#735d3f;font-size:.9rem}.teacher-link{border:0;background:none;color:var(--blue);text-decoration:underline;text-underline-offset:3px;cursor:pointer;font:inherit;padding:10px}.login-status{font-size:.82rem;color:#627c88}.classroom-manager{background:white;border:1px solid var(--line);border-radius:22px;padding:24px;margin-bottom:16px;box-shadow:var(--shadow)}.classroom-manager h2{margin:0;color:var(--navy)}.classroom-manager>div:first-child p{color:#71868f}.classroom-manager form{display:grid;grid-template-columns:1.1fr 1fr 1fr auto;gap:12px;align-items:end}.classroom-manager.key-manager{border-color:#b8d8dc;background:linear-gradient(135deg,#fff,#f4fbfb)}.classroom-manager.key-manager form{grid-template-columns:1fr auto}.classroom-manager.key-manager .form-message{margin-bottom:0}.classroom-manager label,.dashboard-filter label{margin:0;font-size:.88rem}.classroom-manager input,.dashboard-filter input{margin-top:7px}.session-list{display:grid;gap:8px;margin:16px 0}.session-row{display:grid;grid-template-columns:90px 1fr auto;gap:12px;align-items:center;padding:12px 14px;border:1px solid var(--line);border-radius:14px}.session-code{font-family:ui-monospace,monospace;font-size:1.1rem;font-weight:800;color:var(--navy);letter-spacing:.08em}.session-row small{color:#71868f}.session-row button{padding:7px 12px}.dashboard-filter{display:flex;align-items:end;gap:10px;margin:14px 0}.dashboard-filter label{width:min(260px,100%)}@media(max-width:760px){.login-status{display:none}.classroom-manager form,.classroom-manager.key-manager form{grid-template-columns:1fr}.session-row{grid-template-columns:80px 1fr}.session-row button{grid-column:span 2}.dashboard-filter{align-items:stretch;flex-direction:column}.dashboard-filter label{width:100%}}