/* V1.4.2 shell only: existing forms and business components stay unchanged. */
body #mob-tabbar[hidden]{display:none}
.sidebar .nav-item>svg{width:30px;height:30px;padding:6px;border-radius:9px;background:var(--blue-ghost);color:var(--blue);stroke-width:1.8;transition:transform .15s,background .15s}.sidebar .nav-item:hover>svg{transform:scale(1.06)}.sidebar .nav-item.active>svg{background:var(--card);box-shadow:0 2px 8px rgba(10,108,255,.16)}
.sidebar .nav-item[data-nav="dormitory"]>svg,.sidebar .nav-item[data-nav="rewards"]>svg{background:var(--purple-soft);color:var(--purple)}.sidebar .nav-item[data-nav="todo"]>svg,.sidebar .nav-item[data-nav="duties"]>svg{background:var(--orange-soft);color:var(--orange)}.sidebar .nav-item[data-nav="attendance"]>svg,.sidebar .nav-item[data-nav="students"]>svg{background:var(--blue-soft);color:var(--blue)}
.nav-section-title{padding:14px 12px 7px;color:var(--ink-3);font-size:11px;font-weight:700;letter-spacing:1px}
.nav-sidebar-hint{padding:10px 12px;font-size:12px;color:var(--ink-3);line-height:1.7}
.nav-admin-label{margin:2px 10px 14px;padding:8px 10px;border-radius:8px;background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:700}
.nav-hub{max-width:1080px;margin:auto;min-width:0}
.nav-hub h1{font-size:24px;letter-spacing:-.6px;margin-bottom:6px}.nav-hub p{color:var(--ink-3);font-size:13px;line-height:1.7}
.nav-hub-head{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin:0 0 24px}
.nav-search{display:flex;gap:8px;margin:20px 0;max-width:560px}.nav-search input{min-width:0;width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--card);color:var(--ink);font-size:14px}
.nav-category{margin-bottom:26px}.nav-category h2{font-size:14px;font-weight:700;margin:0 0 12px;color:var(--ink-2)}
.nav-feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.nav-feature{display:flex;align-items:center;border:1px solid var(--line);background:var(--card);border-radius:14px;min-width:0;transition:border-color .15s,box-shadow .15s}
.nav-feature:hover{border-color:#b4d1fb;box-shadow:0 4px 18px rgba(20,60,110,.04)}
.nav-feature-open{display:flex;align-items:center;gap:12px;flex:1;padding:18px 12px 18px 16px;min-width:0;text-align:left;color:var(--ink);font-size:14px;font-weight:600}
.nav-feature-open>span:last-child{overflow-wrap:anywhere}.nav-feature-icon{width:35px;height:35px;display:flex;align-items:center;justify-content:center;flex-shrink:0;border-radius:10px;background:var(--blue-ghost);color:var(--blue)}.nav-feature-icon svg{width:19px;height:19px}
.nav-star{width:44px;min-width:44px;height:44px;margin-right:4px;border-radius:10px;font-size:24px;color:var(--ink-3)}.nav-star[aria-pressed=true]{color:#d79c17}.nav-star:hover{background:var(--bg)}
.nav-empty{padding:42px 18px;text-align:center;border:1px dashed var(--line);border-radius:14px;color:var(--ink-3)}
.nav-pref-row{display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin-bottom:8px}.nav-pref-name{flex:1;min-width:0;overflow-wrap:anywhere}.nav-pref-row button{min-width:40px;min-height:40px;padding:6px}.nav-pref-row label{display:flex;align-items:center;gap:6px;font-size:12px}.nav-pref-row input{width:18px;height:18px}
.nav-pref-section{margin-bottom:26px}.nav-pref-section h2{font-size:15px;margin-bottom:12px}.nav-sync-note{font-size:12px;color:var(--ink-3);margin:10px 0}.nav-backend-return{margin-bottom:12px}
.nav-action-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.nav-action-list button{display:flex;gap:10px;align-items:center;text-align:left;padding:18px;background:var(--card);border:1px solid var(--line);border-radius:12px;font-size:14px;color:var(--ink)}.nav-action-list svg{width:20px;height:20px;color:var(--blue)}
@media(max-width:1100px){.nav-feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:860px){
  #app{height:100dvh}.sidebar{display:none!important}.m-menu-btn{display:none!important}
  .nav-hub h1{font-size:21px}.nav-hub-head{margin-bottom:16px}.nav-feature-grid{gap:8px}.nav-feature-open{padding:14px 8px;gap:7px;font-size:13px}.nav-feature-icon{width:28px;height:28px}.nav-star{margin:0;width:40px;min-width:40px}
  #app .main{min-width:0}#app .topbar{gap:8px}#app .topbar>div:not(.topbar-right){min-width:0;flex:1}#app .page-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  #app .topbar-right{flex-shrink:0;gap:4px}#app #btn-announcements,#app #btn-messages,#app #btn-logout{display:none}
  #app .content{padding-bottom:calc(104px + env(safe-area-inset-bottom));scroll-padding-bottom:104px;min-width:0}
  body #mob-tabbar{padding-bottom:calc(7px + env(safe-area-inset-bottom))}.mt-item{flex:1;min-width:0;min-height:48px}
  .nav-pref-row{padding:8px;gap:5px}.nav-action-list{grid-template-columns:1fr}.nav-search input{font-size:16px}
  .modal-mask{padding-bottom:env(safe-area-inset-bottom)}.modal{max-height:calc(100dvh - 32px - env(safe-area-inset-bottom))}.modal-foot{flex-wrap:wrap}
}
@media(max-width:370px){.nav-feature-grid{grid-template-columns:1fr}.nav-pref-row{flex-wrap:wrap}.nav-pref-name{min-width:90px}}