#app,.app-main{min-height:100dvh}.skip-link{position:fixed;left:16px;top:12px;z-index:20;padding:10px 14px;border-radius:999px;color:#fff;background:var(--cps-ink, #111827);box-shadow:var(--cps-shadow-md, 0 18px 50px rgba(20, 32, 48, .1));transform:translateY(-160%);transition:transform .18s var(--cps-ease, cubic-bezier(.22, 1, .36, 1))}.skip-link:focus{transform:translateY(0);outline:3px solid rgba(23,92,255,.24);outline-offset:3px}:root{--cps-bg: #f3f6f9;--cps-bg-elevated: #ffffff;--cps-ink: #111827;--cps-ink-soft: #273449;--cps-muted: #647083;--cps-subtle: #8b95a5;--cps-line: rgba(17, 24, 39, .11);--cps-line-strong: rgba(17, 24, 39, .18);--cps-accent: #175cff;--cps-accent-strong: #0f3fa8;--cps-accent-soft: #e9efff;--cps-success: #16765a;--cps-warning: #af6200;--cps-danger: #c5343a;--cps-radius-sm: 10px;--cps-radius-md: 16px;--cps-radius-lg: 24px;--cps-radius-xl: 32px;--cps-shadow-sm: 0 8px 24px rgba(20, 32, 48, .06);--cps-shadow-md: 0 18px 50px rgba(20, 32, 48, .1);--cps-shadow-lg: 0 28px 80px rgba(20, 32, 48, .14);--cps-ease: cubic-bezier(.22, 1, .36, 1);--el-color-primary: var(--cps-accent);--el-color-success: var(--cps-success);--el-color-warning: #c77915;--el-color-danger: var(--cps-danger);--el-border-radius-base: 10px;--el-font-family: Aptos, "Segoe UI Variable", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif}html{min-height:100%;scroll-behavior:smooth;background:var(--cps-bg)}body{margin:0;min-height:100vh;color:var(--cps-ink);font-family:var(--el-font-family);font-variant-numeric:tabular-nums;text-rendering:optimizeLegibility;background:radial-gradient(circle at 8% 0%,rgba(23,92,255,.12),transparent 30rem),radial-gradient(circle at 100% 12%,rgba(22,118,90,.11),transparent 28rem),linear-gradient(135deg,#f8fafc,#eef3f7 48%,#f5f8f6)}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;pointer-events:none;opacity:.42;background-image:linear-gradient(rgba(17,24,39,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(17,24,39,.03) 1px,transparent 1px);background-size:48px 48px;-webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.76),transparent 78%);mask-image:linear-gradient(to bottom,rgba(0,0,0,.76),transparent 78%)}*{box-sizing:border-box}button,input,textarea,select{font:inherit}button,a,.el-button,.el-card,.el-input__wrapper,.el-textarea__inner,.el-select__wrapper{transition:transform .22s var(--cps-ease),box-shadow .22s var(--cps-ease),border-color .22s var(--cps-ease),background-color .22s var(--cps-ease),color .22s var(--cps-ease)}button:focus-visible,a:focus-visible,.el-button:focus-visible,.el-input__wrapper.is-focus,.el-textarea__inner:focus,.el-select__wrapper.is-focused{outline:3px solid rgba(23,92,255,.18);outline-offset:2px}.el-card{border:1px solid var(--cps-line);border-radius:var(--cps-radius-lg);background:#ffffffdb;box-shadow:var(--cps-shadow-sm)}.el-card__header{padding:18px 22px;border-bottom:1px solid var(--cps-line);color:var(--cps-ink);font-weight:700}.el-card__body{padding:22px}.el-button{border-radius:999px;font-weight:700;letter-spacing:0}.el-button:not(.is-disabled):active{transform:scale(.98)}.el-button--primary,.el-button--success,.el-button--warning,.el-button--danger,.el-button--info{background:#fff;box-shadow:none}.el-button--primary{color:#155f8f;border-color:#155f8f47}.el-button--success{color:#13795b;border-color:#13795b47}.el-button--warning{color:#9a5b00;border-color:#9a5b0047}.el-button--danger{color:#b42318;border-color:#b4231847}.el-button--info{color:#475569;border-color:#47556947}.el-button--primary:not(.is-disabled):hover,.el-button--success:not(.is-disabled):hover,.el-button--warning:not(.is-disabled):hover,.el-button--danger:not(.is-disabled):hover,.el-button--info:not(.is-disabled):hover,.el-button--primary:not(.is-disabled):focus-visible,.el-button--success:not(.is-disabled):focus-visible,.el-button--warning:not(.is-disabled):focus-visible,.el-button--danger:not(.is-disabled):focus-visible,.el-button--info:not(.is-disabled):focus-visible{background:#fff;border-color:var(--cps-line-strong);color:var(--cps-ink);box-shadow:0 10px 22px #14203014;transform:translateY(-1px)}.el-button.is-text{border:1px solid rgba(17,24,39,.1);border-radius:999px;background:#fff;color:var(--cps-ink-soft)}.el-button.is-text:not(.is-disabled):hover,.el-button.is-text:not(.is-disabled):focus-visible{color:var(--cps-ink);background:#fff;border-color:#1118272e}.el-input__wrapper,.el-textarea__inner,.el-select__wrapper{border-radius:14px;border:1px solid rgba(17,24,39,.1);box-shadow:0 1px #fffc,0 10px 22px #1420300a;background:#fffffff0}.el-input__wrapper,.el-select__wrapper{min-height:34px}.el-input--large .el-input__wrapper,.el-select--large .el-select__wrapper{min-height:40px}.el-textarea__inner{min-height:42px}.el-form-item{margin-bottom:10px}.el-input__wrapper:hover,.el-textarea__inner:hover,.el-select__wrapper:hover{border-color:#175cff47;box-shadow:0 14px 28px #14203012}.el-form-item__label{color:var(--cps-ink-soft);font-weight:700}.el-tag{border-radius:999px;font-weight:700}.el-alert{border-radius:var(--cps-radius-md)}.el-upload-dragger{border-radius:var(--cps-radius-lg);border-color:#175cff2e;background:linear-gradient(180deg,#ffffffeb,#f8fbffe0)}.el-upload-dragger:hover{border-color:#175cff75}.admin-console-shell{min-height:100dvh;display:grid;grid-template-columns:248px minmax(0,1fr);background:#f6f8fb}.admin-console-nav{min-width:0;border-right:1px solid #e5e7eb;background:#fff}.admin-console-main{min-width:0;padding:24px}.admin-section-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:16px}.admin-panel,.classroom-panel{min-width:0;border:1px solid #e5e7eb;border-radius:8px;background:#fff}.classroom-page{min-height:100dvh;background:#f7f8fb;color:#111827}.classroom-container{width:min(1040px,100%);margin:0 auto;padding:20px}.classroom-page-heading h1,.classroom-section-title h2{margin:0;color:#111827;letter-spacing:0;text-wrap:balance}@media(max-width:900px){.admin-console-shell{grid-template-columns:1fr}.admin-console-nav{position:sticky;top:0;z-index:10;display:flex;overflow-x:auto;border-right:0;border-bottom:1px solid #e5e7eb}.admin-console-main{padding:16px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}.activity-hub{min-height:100vh;max-width:1120px;margin:0 auto;padding:clamp(20px,4vw,48px);display:grid;align-content:start;gap:24px}.activity-hub__hero{display:grid;gap:8px;max-width:720px}.activity-hub__eyebrow{margin:0;color:#2563eb;font-weight:800}.activity-hub__grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}.activity-card{min-height:160px;border:1px solid #dbe3ef;border-radius:8px;background:#fff;padding:18px;text-align:left;display:grid;gap:10px;align-content:start;box-shadow:0 10px 28px #0f172a14}.activity-card__title{font-size:20px;font-weight:800}.activity-card__subtitle{color:#4b5563}.activity-card__action{margin-top:auto;color:#2563eb;font-weight:800}