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input[type=datetime-local]{padding:7px;font-size:11px;width:100%;border-radius:7px;border:1px solid var(--border)}@media(max-width:1050px){.sidebar{width:225px}.workspace{grid-template-columns:minmax(0,1fr)}.reviewsplit{grid-template-columns:1fr}.hero-mark{display:none}.assign-row{grid-template-columns:minmax(0,1fr) 55px 55px 160px 70px}}@media(max-width:750px){.layout{display:block}.sidebar{position:static;width:100%;height:auto;overflow:visible}.brand{padding:12px 18px}.brand-small{display:none}.side-cap,.side-bottom{display:none}.side-nav{display:flex;overflow:auto}.side-link{width:auto;white-space:nowrap;padding:13px;font-size:12px}.topbar{height:55px;padding:0 17px}.content{padding:22px 15px 55px}.pagehead h1{font-size:22px}.pagehead{flex-wrap:wrap}.stats{grid-template-columns:repeat(2,1fr)}.module-grid,.twocol,.form-grid{grid-template-columns:1fr}.form-grid .span2{grid-column:1}.login-bg{display:block}.login-aside{min-height:240px;padding:35px 25px}.login-aside h1{font-size:27px}.login-aside p,.login-aside .meta{display:none}.login-right{padding:35px 20px}.toolbar{align-items:stretch}.search{width:100%}.assign-row{grid-template-columns:minmax(0,1fr) 40px 40px 140px 55px;font-size:10px;gap:4px}.assign-row input[type=datetime-local]{font-size:9px}.hero{padding:20px}.stat .value{font-size:24px}}

.modal-layer{position:fixed;inset:0;background:#0a1f31aa;z-index:50;display:grid;place-items:center;padding:20px}.modal-card{background:white;padding:28px;border-radius:15px;width:min(100%,430px);box-shadow:0 15px 50px #0004}.modal-card h2{font-size:21px}.modal-card label{margin-top:14px}

/* R2: lesson release controls */
.assign-row{grid-template-columns:minmax(230px,2fr) 90px 135px minmax(155px,1fr) minmax(160px,1fr);gap:13px}
.assign-row .access-actions{display:flex;flex-direction:column;gap:7px;align-items:stretch}
.assign-row .access-actions .button,.assign-row .access-actions .button-soft,.assign-row .access-actions .button-danger{white-space:normal;text-align:center}
@media(max-width:1000px){.assign-row.header{display:none}.assign-row{display:grid;grid-template-columns:minmax(150px,1fr) minmax(150px,1fr);padding:18px 4px}.assign-row>div:first-child{grid-column:1/-1}.assign-row .access-actions{grid-column:1/-1;flex-direction:row}.assign-row .access-actions>*{flex:1}}
@media(max-width:480px){.assign-row{grid-template-columns:1fr}.assign-row>div:first-child,.assign-row .access-actions{grid-column:1}.assign-row .access-actions{flex-direction:column}}
/* R2.2 — math authoring and safe administration */
.formula-toolbar,.admin-actions{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.formula-toolbar{margin:9px 0 11px}
.formula-toolbar button{font-size:11px}
.math-hint{font-size:12px;color:var(--muted);line-height:1.8;margin:8px 0 14px}
.math-hint code{background:#edf2f7;color:#1e5069;padding:2px 5px;border-radius:4px;font-size:11px}
.math-preview-title{font-size:12px;font-weight:750;color:var(--ink);margin-bottom:8px}
.math-preview{padding:16px;border:1px solid #d9e6e8;border-radius:10px;background:#f9fcfc;min-height:55px;font-size:14px;line-height:1.8;overflow-x:auto}
.math-preview .answer-math{white-space:pre-wrap;overflow-wrap:anywhere;font-family:Georgia,'Times New Roman',serif}
.math-preview mjx-container{max-width:100%;overflow-x:auto;overflow-y:hidden}
.math-preview.history-answer{margin:10px 0}
.admin-separator{border:0;border-top:1px solid var(--border);margin:24px 0}
.admin-actions .mini{white-space:nowrap}