:root{--ac-ink:#102b37;--ac-muted:#6b7c82;--ac-line:#dce5e4;--ac-teal:#287c70;--ac-coral:#dd654a;--ac-danger:#b72d36;--ac-paper:#fafaf7}
.access-pending main.shell{visibility:hidden}
body[data-access="guest"] .text-settings,body[data-access="guest"] .note-font-row,body[data-access="guest"] .cover-copy{display:none!important}
.ac-overlay,.ac-admin-overlay,.ac-action-overlay{position:fixed;inset:0;display:grid;place-items:center;padding:24px;background:rgba(16,38,47,.38);backdrop-filter:blur(8px);font-family:Inter,"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ac-ink);z-index:1500}
.ac-overlay{background:radial-gradient(ellipse at 12% 15%,rgba(186,219,201,.66),transparent 56%),radial-gradient(ellipse at 90% 80%,rgba(240,206,175,.6),transparent 53%),rgba(239,243,237,.88)}
.ac-action-overlay{z-index:1700;background:rgba(16,38,47,.5)}
.ac-overlay[hidden],.ac-admin-overlay[hidden],.ac-action-overlay[hidden],.ac-account-bar[hidden],.ac-admin-launch[hidden],.ac-admin-panel[hidden]{display:none!important}
.ac-dialog{box-sizing:border-box;width:min(100%,460px);max-height:calc(100dvh - 48px);overflow:auto;border:1px solid rgba(255,255,255,.9);border-radius:26px;padding:36px;background:rgba(255,255,253,.97);box-shadow:0 28px 90px rgba(30,55,54,.16)}
.ac-emblem{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;background:var(--ac-ink);color:white;font-size:21px;font-weight:800;box-shadow:6px 6px 0 #dcece2;margin-bottom:24px}
.ac-heading{font-size:25px;line-height:1.4;letter-spacing:-.04em;margin:0 0 10px;font-weight:800;color:var(--ac-ink)}
.ac-description{margin:0 0 26px;color:var(--ac-muted);font-size:14px;line-height:1.8;overflow-wrap:anywhere}
.ac-choices{display:grid;gap:13px;margin-top:26px}
.ac-button{appearance:none;box-sizing:border-box;border:1px solid var(--ac-line);border-radius:11px;padding:11px 16px;font:600 14px/1.4 Inter,"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ac-ink);background:#fff;cursor:pointer;transition:background .16s,border-color .16s,transform .16s;white-space:nowrap}
.ac-button:hover{background:#f1f6f2;border-color:#a8c9bd}
.ac-button:focus-visible,.ac-input:focus-visible,.ac-device-details summary:focus-visible{outline:3px solid rgba(40,124,112,.3);outline-offset:3px}
.ac-button:disabled{cursor:wait;opacity:.58}
.ac-primary{background:var(--ac-coral);border-color:var(--ac-coral);color:#fff}
.ac-primary:hover{background:#c9543c;border-color:#c9543c}
.ac-choice{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:22px 20px;text-align:left;white-space:normal;background:#fff}
.ac-choice strong{font-size:21px;flex-shrink:0}
.ac-choice span{font-size:12px;color:var(--ac-muted);font-weight:400}
.ac-choice:first-child{border-color:#c2d7cb;background:#f4f8f2}
.ac-form{display:grid;gap:16px}
.ac-field{display:grid;gap:8px;font-size:13px;font-weight:650;min-width:0;color:var(--ac-ink)}
.ac-input{box-sizing:border-box;width:100%;min-width:0;border:1px solid var(--ac-line);border-radius:10px;background:#fff;color:var(--ac-ink);padding:12px 13px;font:400 15px/1.5 Inter,"Microsoft YaHei",system-ui,sans-serif}
.ac-input::placeholder{color:#98a4a5}
.ac-input:disabled{background:#f3f5f2}
.ac-message{min-height:18px;margin:2px 0 0;color:var(--ac-muted);font-size:12px;line-height:1.65;overflow-wrap:anywhere}
.ac-message:empty{min-height:0;margin:0}
.ac-error,.ac-danger-text{color:var(--ac-danger)!important}
.ac-link{border-color:transparent;background:transparent;color:var(--ac-muted);padding:8px;justify-self:center;font-size:12px;font-weight:400}
.ac-link:hover{border-color:transparent;background:transparent;color:var(--ac-teal)}
.ac-hint{font-size:12px;line-height:1.75;color:var(--ac-muted);margin:0 0 14px}
.ac-form>.ac-hint{margin:-7px 0 0}
.ac-account-bar{position:fixed;right:20px;top:14px;z-index:50;display:flex;align-items:center;gap:12px;background:rgba(255,255,253,.94);border:1px solid var(--ac-line);border-radius:14px;padding:7px 9px 7px 14px;box-shadow:0 5px 22px rgba(30,55,54,.07);font-family:Inter,"Microsoft YaHei",system-ui,sans-serif;color:var(--ac-ink)}
.ac-account-label{font-size:12px;font-weight:600}
.ac-quiet{font-size:12px;padding:7px 11px;border-color:transparent;background:#f1f5ef}
.ac-admin-launch{position:fixed;right:22px;bottom:22px;z-index:60;color:#fff;background:var(--ac-ink);border-color:var(--ac-ink);padding:13px 20px;border-radius:14px;box-shadow:0 8px 28px rgba(16,43,55,.22)}
.ac-admin-launch:hover{background:#24515c;border-color:#24515c}
.ac-admin-dialog{box-sizing:border-box;width:min(1260px,100%);height:min(900px,calc(100dvh - 48px));overflow:auto;border-radius:22px;padding:28px;background:var(--ac-paper);box-shadow:0 28px 90px rgba(12,32,38,.28)}
.ac-admin-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:20px}
.ac-admin-head h2{font-size:27px;margin:0;letter-spacing:-.04em}
.ac-admin-filter{display:flex;gap:14px;align-items:end;flex-wrap:wrap;margin-bottom:12px}
.ac-admin-filter .ac-field{width:180px}
.ac-admin-filter .ac-button{padding-top:13px;padding-bottom:13px}
.ac-admin-content{margin-top:20px}
.ac-metrics{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;margin-bottom:22px}
.ac-metric{background:#fff;border:1px solid var(--ac-line);border-radius:14px;padding:17px 18px;display:grid;gap:9px}
.ac-metric span{font-size:12px;color:var(--ac-muted)}
.ac-metric strong{font-size:29px;line-height:1;font-weight:800}
.ac-warning-metric{border-color:#edb7b8;background:#fff0ef;color:var(--ac-danger)}
.ac-warning-metric span{color:var(--ac-danger)}
.ac-admin-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.ac-tab{background:transparent;border-color:transparent;color:var(--ac-muted)}
.ac-tab[aria-selected="true"]{color:var(--ac-teal);border-color:#c5dcd1;background:#edf6ee}
.ac-create-user{border:1px solid var(--ac-line);border-radius:14px;background:#fff;padding:18px;margin-bottom:18px}
.ac-create-user h3{font-size:15px;margin:0 0 7px}
.ac-create-form{display:flex;align-items:end;gap:12px;flex-wrap:wrap}
.ac-create-form .ac-field{width:220px}
.ac-create-form .ac-primary{padding-top:13px;padding-bottom:13px}
.ac-table-wrap{overflow:auto;border:1px solid var(--ac-line);border-radius:14px;background:#fff}
.ac-table{width:100%;border-collapse:collapse;font-size:12px;line-height:1.65;text-align:left}
.ac-table th{background:#eef3ec;color:#586e71;font-size:11px;font-weight:700;white-space:nowrap}
.ac-table th,.ac-table td{padding:13px 14px;border-bottom:1px solid #e6ece7;vertical-align:top}
.ac-table tr:last-child td{border-bottom:none}
.ac-table .ac-warning-row td{background:#fff0ef}
.ac-empty{text-align:center!important;color:var(--ac-muted);padding:32px!important}
.ac-pill{display:inline-block;padding:3px 8px;border-radius:7px;background:#eef1ed;color:#667876;font-size:11px;white-space:nowrap}
.ac-online-pill{background:#e4f3e8;color:#27794e}
.ac-danger-pill{background:#ffe1df;color:var(--ac-danger)}
.ac-row-actions{display:flex;gap:6px;flex-wrap:wrap;min-width:220px}
.ac-small{padding:6px 8px;font-size:11px;border-radius:7px}
.ac-danger-button{color:var(--ac-danger)}
.ac-danger-button:hover{background:#fff0ef;border-color:#edb7b8}
.ac-muted{color:var(--ac-muted);font-size:12px}
.ac-device-details{min-width:140px;max-width:250px}
.ac-device-details summary{cursor:pointer;color:var(--ac-teal);font-weight:600;white-space:nowrap}
.ac-device-item{display:grid;gap:4px;padding:9px 0;font-size:11px;border-bottom:1px solid var(--ac-line);overflow-wrap:anywhere}
.ac-device-item strong{font-size:11px;font-weight:500}
.ac-device-item span{color:var(--ac-muted);font-size:10px}
.ac-action-dialog{width:min(460px,100%)}
.ac-action-buttons{display:flex;justify-content:end;gap:10px}
@media(max-width:760px){.ac-overlay,.ac-admin-overlay,.ac-action-overlay{padding:12px}.ac-dialog{padding:27px 24px;border-radius:21px;max-height:calc(100dvh - 24px)}.ac-heading{font-size:23px}.ac-description{font-size:13px}.ac-admin-dialog{padding:20px 15px;height:calc(100dvh - 24px);border-radius:18px}.ac-metrics{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.ac-metric{padding:13px}.ac-metric strong{font-size:25px}.ac-account-bar{top:9px;right:10px;gap:7px;padding-left:10px}.ac-account-label{font-size:11px}.ac-admin-launch{right:14px;bottom:14px;padding:11px 16px}.ac-admin-filter .ac-field{width:calc(50% - 7px)}.ac-create-form .ac-field{width:100%}.ac-create-form .ac-primary{width:100%}.ac-table th,.ac-table td{padding:11px 10px}.ac-choice{padding:20px 16px}.ac-choice span{font-size:11px}body[data-access="guest"] main.shell,body[data-access="teacher"] main.shell,body[data-access="admin"] main.shell{padding-top:73px}}
@media(prefers-reduced-motion:reduce){.ac-button{transition:none}}