/* Charta Learning Center 3.6.0 — unified user-experience layer */
:root{
  --clc-ux-blue:#245edb;--clc-ux-blue-2:#4778ef;--clc-ux-cyan:#18aebf;
  --clc-ux-ink:#172b44;--clc-ux-text:#334b65;--clc-ux-muted:#71839a;
  --clc-ux-line:#dfe8f2;--clc-ux-soft:#f4f7fb;--clc-ux-paper:#fff;
  --clc-ux-radius:20px;--clc-ux-shadow:0 16px 42px rgba(27,54,89,.08);
}
body:has(.clc-center),body:has(.clc-case-gallery),body:has(.clc-content-hub){background:#f3f6fa!important;}
.clc-center,.clc-case-gallery,.clc-content-hub{font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--clc-ux-text);}
.clc-center{width:min(1840px,calc(100vw - 44px))!important;max-width:none!important;margin-inline:auto!important;}
.clc-app-header,.clc-workspace-header{border:1px solid var(--clc-ux-line)!important;border-radius:26px!important;background:linear-gradient(135deg,#fff,#f7faff)!important;box-shadow:var(--clc-ux-shadow)!important;}
.clc-app-header-actions,.clc-workspace-actions{gap:9px!important;}
.clc-app-header-actions>a,.clc-workspace-actions>a{min-height:42px!important;padding:0 15px!important;border:1px solid #d9e4f0!important;border-radius:13px!important;background:#fff!important;color:#38536f!important;font-weight:800!important;text-decoration:none!important;box-shadow:0 7px 18px rgba(33,65,104,.05)!important;}
.clc-app-header-actions>a:hover,.clc-workspace-actions>a:hover{border-color:#a9c4eb!important;background:#f2f7ff!important;color:#1f58b1!important;transform:translateY(-1px);}
.clc-app-header-actions .is-message-hub{background:linear-gradient(135deg,#edf5ff,#f7fbff)!important;color:#205bb7!important;}
.clc-app-header-actions a em,.clc-workspace-actions a em{display:inline-grid;place-items:center;min-width:21px;height:21px;margin-left:5px;padding:0 5px;border-radius:999px;background:#ef4d5d;color:#fff;font-size:10px;font-style:normal;}
.clc-points-pill span{color:#60758d!important}.clc-points-pill strong{color:var(--clc-ux-blue)!important}

@media(min-width:1510px){
  .clc-app-shell{grid-template-columns:250px minmax(700px,1fr) 318px!important;gap:22px!important;align-items:start!important;}
  .clc-teacher-shell{grid-template-columns:minmax(0,1fr) 318px!important;gap:22px!important;align-items:start!important;}
  .clc-role-portal .clc-role-shell,.clc-role-portal .clc-app-shell{grid-template-columns:minmax(0,1fr) 318px!important;gap:22px!important;}
  .clc-app-sidebar,.clc-app-rail,.clc-teacher-rail,.clc-role-rail{position:sticky!important;top:22px!important;align-self:start!important;}
}
.clc-app-sidebar,.clc-app-rail,.clc-teacher-main,.clc-teacher-rail,.clc-role-rail{min-width:0!important;}
.clc-app-sidebar{padding:14px!important;border:1px solid var(--clc-ux-line)!important;border-radius:22px!important;background:rgba(255,255,255,.96)!important;box-shadow:var(--clc-ux-shadow)!important;}
.clc-app-nav{gap:7px!important;}
.clc-app-nav>a{min-height:48px!important;padding:8px 11px!important;border-radius:13px!important;color:#36506c!important;font-size:14px!important;font-weight:800!important;}
.clc-app-nav>a:hover{background:#f1f6ff!important;color:#225ebd!important;}
.clc-app-nav>a.is-active{background:linear-gradient(135deg,var(--clc-ux-blue),var(--clc-ux-blue-2))!important;color:#fff!important;box-shadow:0 12px 24px rgba(36,94,219,.22)!important;}
.clc-app-nav>a.is-active .clc-nav-icon{background:rgba(255,255,255,.14)!important;color:#fff!important;border-color:rgba(255,255,255,.24)!important;}
.clc-sidebar-help{margin-top:14px!important;padding:15px!important;border:1px solid #e2e9f2!important;border-radius:16px!important;background:#f8fafc!important;}
.clc-app-workspace,.clc-workspace-body{min-width:0!important;}
.clc-app-workspace>section,.clc-workspace-body>section,.clc-role-main>section{border-radius:22px!important;}
.clc-section-heading{padding:24px 26px!important;border:1px solid var(--clc-ux-line)!important;border-radius:20px!important;background:#fff!important;box-shadow:0 12px 30px rgba(28,57,92,.055)!important;}
.clc-section-heading h2{color:var(--clc-ux-ink)!important;letter-spacing:-.015em!important;}
.clc-surface-card,.clc-assignment-card,.clc-score-card,.clc-profile-card,.clc-form-card{border:1px solid var(--clc-ux-line)!important;border-radius:20px!important;background:#fff!important;box-shadow:0 12px 30px rgba(28,57,92,.055)!important;}
.clc-empty,.clc-case-empty{display:grid;place-items:center;min-height:180px;padding:32px!important;border:1px dashed #cbd9e9!important;border-radius:20px!important;background:linear-gradient(180deg,#fff,#f8fbff)!important;color:var(--clc-ux-muted)!important;text-align:center!important;}
.clc-empty h2,.clc-empty h3{color:var(--clc-ux-ink)!important;}
.clc-button,.clc-app-workspace button[type=submit],.clc-workspace-body button[type=submit]{min-height:44px!important;border-radius:12px!important;font-weight:850!important;}

/* Unified message center */
.clc-message-hub{margin-bottom:18px;padding:0!important;border:0!important;background:transparent!important;box-shadow:none!important;}
.clc-message-hub__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px;margin-top:16px;}
.clc-message-hub__grid>a{position:relative;display:grid;grid-template-columns:1fr auto;gap:5px 12px;min-height:136px;padding:20px;border:1px solid var(--clc-ux-line);border-radius:19px;background:#fff;color:var(--clc-ux-text)!important;text-decoration:none!important;box-shadow:0 12px 28px rgba(28,57,92,.055);transition:.18s ease;}
.clc-message-hub__grid>a:hover{transform:translateY(-2px);border-color:#b6ccee;box-shadow:0 18px 38px rgba(28,57,92,.10);}
.clc-message-hub__grid span{font-size:15px;font-weight:900;color:var(--clc-ux-ink);}
.clc-message-hub__grid strong{display:grid;place-items:center;min-width:42px;height:42px;border-radius:14px;background:#edf4ff;color:var(--clc-ux-blue);font-size:21px;}
.clc-message-hub__grid small{grid-column:1/-1;color:var(--clc-ux-muted);font-size:12px;line-height:1.65;}
.clc-message-hub__grid .is-group strong{background:#eaf9f7;color:#078a78}.clc-message-hub__grid .is-private strong{background:#f2edff;color:#7049d8}
#clc-system-messages{scroll-margin-top:24px;}

/* Teacher center priority navigation */
.clc-workspace-nav{display:flex!important;gap:8px!important;flex-wrap:wrap!important;padding:10px!important;border:1px solid var(--clc-ux-line)!important;border-radius:18px!important;background:#fff!important;box-shadow:0 10px 26px rgba(28,57,92,.05)!important;}
.clc-workspace-nav>a{min-height:42px!important;padding:9px 14px!important;border-radius:12px!important;color:#4e637b!important;font-weight:800!important;text-decoration:none!important;}
.clc-workspace-nav>a.is-active{background:linear-gradient(135deg,var(--clc-ux-blue),var(--clc-ux-blue-2))!important;color:#fff!important;box-shadow:0 9px 20px rgba(36,94,219,.19)!important;}
.clc-workspace-nav>a em{display:inline-grid;place-items:center;min-width:20px;height:20px;margin-left:4px;padding:0 5px;border-radius:999px;background:#eef3fb;color:#315c9b;font-size:10px;font-style:normal;}
.clc-workspace-nav>a.is-active em{background:rgba(255,255,255,.17);color:#fff;}

/* Right rail */
.clc-app-rail>section,.clc-teacher-rail>section,.clc-role-rail>section{border:1px solid var(--clc-ux-line)!important;border-radius:21px!important;background:#fff!important;box-shadow:var(--clc-ux-shadow)!important;}

/* Case and content public centers */
.clc-case-gallery,.clc-content-hub{width:min(1880px,calc(100vw - 52px))!important;max-width:none!important;margin-inline:auto!important;}
.clc-case-gallery__grid{align-items:stretch!important;}
.clc-case-gallery__grid .clc-case-card{height:100%!important;}
.clc-case-gallery__grid .clc-case-card__body{display:flex!important;flex-direction:column!important;height:calc(100% - var(--media-height,0px))!important;}
.clc-case-gallery__grid .clc-case-card__body>div{margin-top:auto!important;}

/* Tablet and mobile */
@media(max-width:1509px){
  .clc-center{width:min(1320px,calc(100vw - 30px))!important;}
  .clc-app-shell,.clc-teacher-shell,.clc-role-portal .clc-role-shell{grid-template-columns:230px minmax(0,1fr)!important;gap:18px!important;}
  .clc-app-rail,.clc-teacher-rail,.clc-role-rail{grid-column:2!important;display:grid!important;grid-template-columns:repeat(2,minmax(0,1fr))!important;gap:16px!important;}
  .clc-message-hub__grid{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media(max-width:980px){
  .clc-center{width:min(100%,calc(100vw - 20px))!important;}
  .clc-app-shell,.clc-teacher-shell,.clc-role-portal .clc-role-shell{display:block!important;}
  .clc-app-sidebar{position:static!important;margin-bottom:16px!important;}
  .clc-app-sidebar .clc-app-nav{display:flex!important;overflow-x:auto!important;flex-wrap:nowrap!important;padding-bottom:3px!important;}
  .clc-app-sidebar .clc-app-nav>a{flex:0 0 auto!important;}
  .clc-app-rail,.clc-teacher-rail,.clc-role-rail{display:grid!important;grid-template-columns:repeat(2,minmax(0,1fr))!important;margin-top:18px!important;}
  .clc-message-hub__grid{grid-template-columns:1fr!important;}
}
@media(max-width:700px){
  .clc-center{width:100%!important;padding-inline:8px!important;}
  .clc-app-header,.clc-workspace-header{padding:18px 14px!important;border-radius:20px!important;}
  .clc-app-header-actions,.clc-workspace-actions{display:flex!important;overflow-x:auto!important;flex-wrap:nowrap!important;width:100%!important;padding-bottom:3px!important;}
  .clc-app-header-actions>a,.clc-workspace-actions>a{flex:0 0 auto!important;}
  .clc-app-sidebar{display:none!important;}
  .clc-app-rail,.clc-teacher-rail,.clc-role-rail{grid-template-columns:1fr!important;}
  .clc-mobile-nav,.clc-teacher-mobile-nav{padding-bottom:calc(7px + env(safe-area-inset-bottom))!important;}
  .clc-mobile-nav__inner{display:grid!important;grid-template-columns:repeat(5,1fr)!important;}
  .clc-mobile-nav__inner>a{min-width:0!important;padding:7px 2px!important;font-size:11px!important;}
  .clc-mobile-nav__inner .clc-nav-icon{width:28px!important;height:28px!important;}
  .clc-section-heading{padding:20px 16px!important;}
  .clc-case-gallery,.clc-content-hub{width:100%!important;padding-inline:9px!important;}
}