:root{--ink:#17232f;--muted:#66727b;--paper:#f7f5f0;--surface:#fffefa;--navy:#142837;--coral:#df6447;--line:#dcded7;--soft:#ecebe5;--serif:"Noto Serif TC",serif;--sans:"Noto Sans TC",sans-serif;--mono:"DM Mono",monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:14px}.app-shell{display:flex;min-height:100vh}.sidebar{width:248px;flex:0 0 248px;background:var(--navy);color:#e8eceb;display:flex;flex-direction:column;padding:31px 20px 21px;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:11px;color:#fff;text-decoration:none;font-family:var(--serif);font-size:16px;font-weight:700;line-height:1.35}.brand-mark{display:grid;place-items:center;width:34px;height:34px;border:1px solid #8da0a9;border-radius:50%;font-family:var(--mono);font-size:18px}.course-label{font:10px var(--mono);letter-spacing:.06em;color:#94a6ad;border-bottom:1px solid #37505e;padding:25px 0 20px;margin:0 0 15px}.sidebar nav{display:grid;gap:4px}.nav-item,.plain-button{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:7px;color:#b7c3c8;text-decoration:none;border:0;background:transparent;font:14px var(--sans);text-align:left}.nav-item svg,.plain-button svg{width:18px}.nav-item:hover,.nav-item.active{color:#fff;background:#28414e}.nav-count{margin-left:auto;color:#a9c5c5;font:11px var(--mono)}.sidebar-spacer{flex:1}.sidebar-footer{border-top:1px solid #37505e;padding-top:13px}.profile{color:#fff;width:100%;display:flex;align-items:center;gap:10px;text-align:left;background:0;border:0;padding:14px 4px 0;font-family:var(--sans)}.profile small{display:block;color:#94a6ad;margin-top:1px}.profile svg{width:14px;margin-left:auto}.avatar{width:38px;height:38px;border-radius:50%;display:inline-grid;place-items:center;flex:0 0 auto;background:#6a8190;color:white;font-weight:600}.avatar-sm{width:28px;height:28px;font-size:11px;border:2px solid var(--surface)}.coral{background:#d7664f}.navy{background:#304d65}.moss{background:#6e7d64}.blue{background:#607a9d}.yellow{background:#bd9146}.main-content{width:min(1200px,calc(100% - 248px));padding:44px 54px 68px;margin:0 auto}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:43px}.eyebrow,.section-kicker{margin:0 0 6px;color:var(--muted);font:11px var(--mono);letter-spacing:.04em}.topbar h1{font:700 26px var(--serif);margin:0}.top-actions{display:flex;align-items:center;gap:7px}.icon-button{border:0;background:transparent;padding:9px;color:var(--ink);position:relative}.icon-button svg{width:20px}.notification:after{content:"";position:absolute;background:var(--coral);width:6px;height:6px;border-radius:50%;right:7px;top:7px;border:1px solid var(--paper)}.new-post{display:inline-flex;gap:8px;align-items:center;border:0;border-radius:6px;color:#fff;background:var(--coral);font:600 13px var(--sans);padding:11px 15px;margin-left:8px;cursor:pointer}.new-post:hover{background:#c65136}.new-post svg{width:16px}.welcome{display:flex;justify-content:space-between;gap:40px;border-top:1px solid var(--ink);border-bottom:1px solid var(--line);padding:31px 0 33px;margin-bottom:45px}.section-kicker{color:var(--coral)}.welcome h2{font:700 29px/1.45 var(--serif);letter-spacing:-.03em;margin:0 0 12px}.welcome>div>p:last-child{color:var(--muted);margin:0}.week-progress{min-width:277px;align-self:end;padding:3px 0 2px}.progress-head{display:flex;justify-content:space-between;font-size:13px;margin-bottom:11px}.progress-head strong{font-family:var(--mono);font-weight:500}.progress-track{height:7px;border-radius:10px;background:#dedfd9;overflow:hidden}.progress-track span{display:block;width:60%;height:100%;background:#4c7680}.week-progress p{font-size:12px;color:var(--muted);margin:10px 0 0}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:51px}.section-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:20px}.section-heading h2,.rail-heading h2{font:700 22px var(--serif);margin:0}.text-button,.rail-heading a{display:inline-flex;align-items:center;gap:6px;border:0;background:transparent;color:var(--ink);font:13px var(--sans);text-decoration:none;padding:4px 0}.text-button svg,.rail-heading svg,.notice svg{width:15px}.pinned-post{background:#e5ede9;border-left:4px solid #4c7680;padding:22px 24px 17px}.post-meta{display:flex;align-items:center;gap:9px;font-size:12px;color:var(--muted)}.post-meta strong{font-weight:600;color:var(--ink);font-size:13px}.pin{display:inline-flex;gap:4px;color:#365e68;font:11px var(--mono)}.pin svg{width:13px}.pinned-post h3,.post h3{font:600 18px/1.55 var(--serif);margin:11px 0 7px}.pinned-post p,.post p{color:#516069;line-height:1.75;margin:0}.post-footer{display:flex;align-items:center;justify-content:space-between;margin-top:18px;color:var(--muted);font-size:12px}.people{display:flex;align-items:center}.people .avatar+ .avatar{margin-left:-7px}.people>span:last-child{margin-left:8px}.reply{border:0;background:transparent;color:var(--ink);display:flex;gap:5px;align-items:center;font:12px var(--sans)}.reply svg,.post-footer svg{width:14px}.post-list{margin-top:6px}.post{display:flex;gap:14px;border-bottom:1px solid var(--line);padding:23px 0}.post h3{font-size:16px;margin:5px 0}.post p{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.post .post-footer{justify-content:flex-start;gap:19px;margin-top:11px}.right-rail{border-left:1px solid var(--line);padding-left:27px}.rail-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px}.rail-heading h2{font-size:17px}.rail-heading a{color:var(--muted);font-size:11px}.schedule{padding:0;margin:0;list-style:none}.schedule li{display:flex;position:relative;gap:11px;padding:0 0 20px}.schedule li:before{content:"";position:absolute;width:1px;height:20px;background:#cfd4cf;left:12px;top:27px}.schedule li:last-child:before{display:none}.schedule li>span{width:25px;height:25px;display:grid;place-items:center;border:1px solid #b9c1bd;border-radius:50%;font:10px var(--mono);color:var(--muted)}.schedule li.done>span{background:#4c7680;color:#fff;border-color:#4c7680}.schedule strong{font-size:12px;display:block;margin:1px 0 3px;font-weight:600}.schedule small{color:var(--muted);font-size:11px}.schedule svg{width:15px;color:#4c7680;margin-left:auto;margin-top:4px}.notice{background:#f1e9df;margin-top:16px;padding:16px 14px;display:flex;gap:10px}.notice>svg{color:#b55f45;flex:none;margin-top:2px}.notice strong{font:600 13px var(--serif)}.notice p{margin:6px 0 10px;font-size:11px;line-height:1.65;color:#5b6060}.notice a{font-size:11px;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:5px}.downloads{margin-top:54px;padding-top:38px;border-top:1px solid var(--ink)}.resource-list{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.resource{display:flex;align-items:center;gap:12px;min-width:0;color:var(--ink);text-decoration:none;padding:18px 12px 18px 0}.resource+.resource{border-left:1px solid var(--line);padding-left:18px}.file-icon{display:grid;place-items:center;width:31px;height:36px;background:#e6e6df;font:9px var(--mono);font-weight:500}.file-icon.pdf{color:#b7513c;background:#f0ded9}.file-icon.zip{color:#35616c;background:#dce9e7}.file-icon.doc{color:#685393;background:#e6e0ef}.resource strong{display:block;font-size:12px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.resource small{display:block;color:var(--muted);font-size:10px;margin-top:4px}.resource svg{width:16px;margin-left:auto;color:var(--muted);flex:none}.mobile-menu{display:none}dialog{border:0;padding:0;width:min(520px,calc(100vw - 32px));box-shadow:0 18px 60px #15263444;background:var(--surface)}dialog::backdrop{background:#14283799}dialog form{padding:35px;position:relative}dialog h2{font:700 25px var(--serif);margin:0 0 24px}.close{position:absolute;right:18px;top:16px;font-size:28px;border:0;background:transparent;color:var(--muted)}label{display:grid;gap:7px;font-size:12px;margin-top:14px}input,textarea{font:14px var(--sans);border:1px solid var(--line);border-radius:5px;background:#fff;padding:10px}textarea{height:110px;resize:vertical}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:23px}.cancel{border:0;background:transparent;padding:10px 14px;font:13px var(--sans)}
@media(max-width:900px){.sidebar{width:210px;flex-basis:210px}.main-content{width:calc(100% - 210px);padding:35px 30px}.content-grid{grid-template-columns:1fr}.right-rail{border-left:0;border-top:1px solid var(--line);padding:26px 0 0;display:grid;grid-template-columns:1fr 1fr;gap:30px}.notice{margin-top:0}.resource-list{grid-template-columns:1fr}.resource+.resource{border-left:0;border-top:1px solid var(--line);padding-left:0}}@media(max-width:650px){.sidebar{display:none}.main-content{width:100%;padding:24px 20px 45px}.mobile-menu{display:block;border:0;background:transparent;padding:5px;margin-right:8px}.mobile-menu svg{width:21px}.topbar{justify-content:flex-start;margin-bottom:29px}.topbar h1{font-size:23px}.top-actions .icon-button{display:none}.new-post{position:fixed;right:18px;bottom:18px;z-index:2;box-shadow:0 7px 18px #17232f33}.welcome{display:block;padding:25px 0}.welcome h2{font-size:25px}.week-progress{min-width:0;margin-top:25px}.content-grid{gap:36px}.right-rail{display:block}.notice{margin-top:19px}.post p{white-space:normal}.pinned-post{padding:19px}.pinned-post h3{font-size:17px}.people>span:last-child{font-size:10px}.downloads{margin-top:38px}.resource-list{margin-top:0}}
.login-page{background:var(--paper)}.login-layout{min-height:100vh;display:grid;grid-template-columns:1.1fr .9fr}.login-intro{background:var(--navy);color:#f8faf8;padding:52px clamp(35px,8vw,130px);display:flex;flex-direction:column;justify-content:space-between}.login-intro .section-kicker{margin-bottom:18px}.login-intro h1{font:700 clamp(35px,4vw,57px)/1.32 var(--serif);letter-spacing:-.04em;margin:0 0 22px}.login-intro>div>p:last-child{max-width:370px;line-height:1.9;color:#b6c4c8}.login-intro small{font:10px var(--mono);color:#8498a2}.login-panel{display:grid;place-items:center;padding:35px}.login-panel form{width:min(366px,100%)}.login-panel h2{font:700 31px var(--serif);margin:0 0 7px}.form-lead{color:var(--muted);margin:0 0 29px;font-size:13px}.login-panel label{font-size:12px;color:var(--ink)}.login-panel input:not([type=checkbox]){height:45px;width:100%}.login-options{display:flex;align-items:center;justify-content:space-between;margin-top:17px;font-size:11px}.login-options a{color:#456b75;text-decoration:none}.checkbox{display:flex!important;align-items:center;gap:6px!important;margin:0!important;font-size:11px!important;color:var(--muted)!important}.checkbox input{accent-color:#456b75}.login-submit{width:100%;justify-content:center;margin:27px 0 0}.login-submit span{font-size:18px;line-height:10px}.login-help{text-align:center;color:var(--muted);font-size:11px;margin-top:21px}@media(max-width:650px){.login-layout{display:block}.login-intro{min-height:40vh;padding:32px 28px}.login-intro h1{font-size:32px}.login-intro small{display:none}.login-panel{padding:42px 28px 55px;display:block}.login-panel form{width:100%}}
.login-error{margin:13px 0 -3px;padding:9px 10px;color:#9c412f;background:#f5e2dc;font-size:11px;line-height:1.5}.profile{cursor:pointer}

/* Phase 1 additions */
[hidden]{display:none!important}
body.auth-loading .app-shell{opacity:0;pointer-events:none}
.plain-button,.text-button,.cancel,.close,.tab-btn,.btn-inline{cursor:pointer}
.plain-button{width:100%}
.plain-button:hover{color:#fff;background:#28414e}
.topbar-left{display:flex;align-items:center;gap:6px}
.alert-banner{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#f5e2dc;border-left:4px solid var(--coral);padding:14px 18px;margin-bottom:24px;border-radius:4px}
.alert-banner strong{display:block;font-size:13px;color:#7c2f1f;margin-bottom:2px}
.alert-banner p{margin:0;font-size:12px;color:#8e4332}
.btn-sm{padding:8px 12px;font-size:12px;margin-left:0;flex:none}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:36px}
.stat-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:18px 20px}
.stat-label{display:block;font-size:12px;color:var(--muted)}
.stat-value{display:block;font:700 28px var(--mono);color:var(--ink);margin:8px 0 4px}
.stat-card small{font-size:11px;color:var(--muted)}
.home-panel{border-top:1px solid var(--line);padding-top:28px}
.course-chips{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.course-chip{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:14px 16px}
.course-chip strong{display:block;font-size:14px;margin-bottom:4px}
.course-chip span{display:block;font-size:12px;color:var(--muted)}
.course-chip p{margin:8px 0 0;font-size:12px;color:#516069;line-height:1.5}
.empty-note{color:var(--muted);font-size:13px}
.empty-card{background:var(--surface);border:1px dashed var(--line);border-radius:8px;padding:36px 28px;text-align:center}
.empty-card h3{font:600 18px var(--serif);margin:0 0 8px}
.empty-card p{color:var(--muted);max-width:480px;margin:0 auto;line-height:1.7}
.tab-bar{display:flex;gap:8px;border-bottom:1px solid var(--line);margin-bottom:24px}
.tab-btn{border:0;background:transparent;padding:10px 16px;font:500 13px var(--sans);color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px}
.tab-btn.active{color:var(--ink);font-weight:600;border-bottom-color:var(--coral)}
.panel-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}
.panel-desc{margin:0;color:var(--muted);font-size:13px}
.table-wrap{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow-x:auto}
.data-table{width:100%;border-collapse:collapse;font-size:13px}
.data-table th,.data-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle}
.data-table th{font:500 11px var(--mono);color:var(--muted);background:#f3f1eb;text-transform:uppercase;letter-spacing:.04em}
.data-table tr:last-child td{border-bottom:0}
.data-table small{display:block;color:var(--muted);font:11px var(--mono);margin-top:2px}
.col-actions{white-space:nowrap}
.action-group{display:flex;gap:6px;flex-wrap:wrap}
.btn-inline{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:5px;padding:5px 9px;font:12px var(--sans)}
.btn-inline:hover{background:var(--soft)}
.btn-inline.danger{color:#a83924;border-color:#e5c5be}
.btn-inline.danger:hover{background:#f8eae7}
.badge{display:inline-block;padding:2px 8px;border-radius:99px;font-size:11px;font-weight:500}
.badge-admin{background:#dce9e7;color:#27525c}
.badge-student{background:#ecebe5;color:#4a555e}
.badge-ok{background:#e2eee5;color:#2e633f}
.badge-off{background:#f5e2dc;color:#9c412f}
.badge-warn{background:#f6ebd5;color:#87611c}
.settings-form{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:24px 28px;max-width:620px}
.settings-form label:first-child{margin-top:0}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.checkbox-inline{display:flex!important;flex-direction:row!important;align-items:center;gap:8px;margin-top:18px;font-size:13px;cursor:pointer}
.checkbox-inline input{width:auto;margin:0}
.form-actions{margin-top:24px;display:flex;justify-content:flex-end}
select{font:14px var(--sans);border:1px solid var(--line);border-radius:5px;background:#fff;padding:10px}
.dialog-sub{margin:-14px 0 16px;font-size:13px;color:var(--muted)}
.dialog-error{margin:12px 0 0;padding:8px 10px;border-radius:5px;background:#f5e2dc;color:#9c412f;font-size:12px}
.toast{position:fixed;right:24px;bottom:24px;z-index:50;background:var(--navy);color:#fff;padding:11px 16px;border-radius:7px;font-size:13px;box-shadow:0 10px 28px #14283733}
.toast.error{background:#9c412f}
.login-hint{color:var(--muted);font-size:11px}
@media(max-width:900px){.stats-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:650px){
  .sidebar{display:flex;position:fixed;left:0;top:0;bottom:0;z-index:30;transform:translateX(-100%);transition:transform .2s ease}
  .sidebar.open{transform:translateX(0)}
  .sidebar-backdrop{position:fixed;inset:0;background:#14283780;z-index:25}
  .stats-grid,.form-row{grid-template-columns:1fr}
  .panel-toolbar,.alert-banner{flex-direction:column;align-items:flex-start}
}

/* Phase 2: Forum & Rich Text Editor */
.dialog-wide{width:min(780px,calc(100vw - 28px))}
.forum-filters{display:flex;gap:12px;align-items:center;margin-bottom:20px;flex-wrap:wrap}
.forum-filters select{min-width:200px}
.search-box{display:flex;gap:8px;flex:1;min-width:220px}
.search-box input{flex:1}
.forum-post-list,.home-recent-list{display:grid;gap:12px}
.home-panel+.home-panel{margin-top:32px}
.forum-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:18px 20px;cursor:pointer;transition:border-color .15s ease}
.forum-card:hover{border-color:#98a8ae}
.forum-card.pinned{background:#eef4f1;border-left:4px solid #4c7680}
.forum-card-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-bottom:8px}
.forum-card h3{font:600 17px/1.45 var(--serif);margin:0 0 6px;color:var(--ink)}
.forum-card-excerpt{margin:0 0 12px;color:#516069;font-size:13px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.forum-card-foot{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--muted)}
.forum-card-stats{display:flex;gap:14px;font-family:var(--mono);font-size:11px}
.course-tag{display:inline-block;padding:2px 8px;border-radius:4px;background:#e6ecea;color:#2e5159;font-size:11px;font-weight:500}
.pin-tag{display:inline-flex;align-items:center;gap:4px;color:#2e5c66;font:600 11px var(--mono)}
.detail-topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;flex-wrap:wrap}
.post-detail-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:26px 28px;margin-bottom:28px}
.post-detail-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin-bottom:12px}
.post-detail-title{font:700 24px/1.4 var(--serif);margin:0 0 20px}
.rich-content{font-size:14px;line-height:1.8;color:var(--ink);overflow-wrap:anywhere}
.rich-content img{max-width:100%;height:auto;border-radius:6px;margin:10px 0;border:1px solid var(--line)}
.rich-content pre{background:#182631;color:#edf2f4;padding:14px 16px;border-radius:6px;overflow-x:auto;font:13px/1.6 var(--mono)}
.rich-content code{font-family:var(--mono);background:#eceae2;padding:1px 5px;border-radius:4px;font-size:12px}
.rich-content pre code{background:transparent;padding:0}
.rich-content blockquote{border-left:3px solid #4c7680;margin:12px 0;padding:4px 14px;color:#516069;background:#f4f3ee}
.rich-content a{color:#2e5c66}
.replies-section h3{font:700 18px var(--serif);margin:0 0 14px}
.replies-list{display:grid;gap:12px;margin-bottom:24px}
.reply-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:16px 20px}
.reply-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px;font-size:12px;color:var(--muted)}
.reply-head strong{color:var(--ink);font-size:13px;margin-right:8px}
.reply-composer{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:18px 20px}
.editor-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:14px 0 8px;font-size:12px}
.reply-composer .editor-head{margin-top:0}
.editor-shell{background:#fff;border-radius:6px}
.editor-shell .ql-toolbar.ql-snow{border-color:var(--line);border-radius:6px 6px 0 0;background:#faf9f5}
.editor-shell .ql-container.ql-snow{border-color:var(--line);border-radius:0 0 6px 6px;min-height:180px;font-family:var(--sans);font-size:14px}
#reply-quill .ql-container.ql-snow,.reply-composer .ql-container.ql-snow{min-height:120px}
.html-source{width:100%;min-height:220px;font:13px/1.55 var(--mono);border:1px solid var(--line);border-radius:6px;padding:12px;resize:vertical}
.editor-hint{font-size:11px;color:var(--muted);margin:8px 0 0}
.reply-composer-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;flex-wrap:wrap}
@media(max-width:650px){.post-detail-card{padding:20px 18px}.reply-composer{padding:16px}}

/* Phase 3: Downloads, Schedule PDF & Seating Chart */
.resource-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px}
.res-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:18px;display:flex;flex-direction:column;gap:10px}
.res-card-head{display:flex;align-items:flex-start;gap:12px}
.res-ext{display:grid;place-items:center;width:40px;height:44px;border-radius:6px;background:#eceae2;font:600 10px var(--mono);color:var(--ink);flex:none;text-transform:uppercase}
.res-ext.pdf{background:#f0ded9;color:#a83924}
.res-ext.zip{background:#dce9e7;color:#2e5c66}
.res-ext.img{background:#e2eee5;color:#2e633f}
.res-card-title{font:600 15px/1.4 var(--serif);margin:0 0 4px}
.res-card-meta{font-size:11px;color:var(--muted);display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.res-card-desc{margin:0;font-size:13px;color:#516069;line-height:1.6}
.res-card-foot{margin-top:auto;padding-top:10px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap}
.res-card-foot a{text-decoration:none}
.schedule-layout{display:grid;grid-template-columns:280px minmax(0,1fr);gap:20px;align-items:start}
.schedule-sidebar{display:grid;gap:10px}
.schedule-item{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:14px 16px;cursor:pointer;transition:border-color .15s ease}
.schedule-item.active,.schedule-item:hover{border-color:var(--coral)}
.schedule-item.active{background:#fdf8f5}
.schedule-item strong{display:block;font-size:14px;margin:6px 0 4px}
.schedule-item small{display:block;font-size:11px;color:var(--muted)}
.schedule-viewer{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.viewer-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-bottom:1px solid var(--line);background:#faf9f5;flex-wrap:wrap}
.viewer-bar a{text-decoration:none}
#schedule-pdf-frame{width:100%;height:72vh;border:0;display:block;background:#f3f1eb}
.seating-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:18px}
.seating-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;overflow:hidden;display:flex;flex-direction:column}
.seating-thumb{width:100%;aspect-ratio:16/10;object-fit:contain;background:#f3f1eb;cursor:zoom-in;border-bottom:1px solid var(--line)}
.seating-body{padding:16px 18px;display:flex;flex-direction:column;gap:8px;flex:1}
.seating-body h3{font:600 16px var(--serif);margin:0}
.upload-progress{display:flex;align-items:center;gap:10px;margin-top:14px}
.upload-progress progress{flex:1;height:10px;accent-color:var(--coral)}
.upload-progress span{font:500 12px var(--mono);min-width:42px;text-align:right}
.dialog-lightbox{width:min(94vw,1100px);padding:20px;background:#142837;color:#fff;text-align:center}
.dialog-lightbox img{max-width:100%;max-height:78vh;object-fit:contain;border-radius:4px}
.dialog-lightbox p{margin:12px 0 0;font-size:13px;color:#d6e0e4}
.lightbox-close{color:#fff;top:8px;right:14px}
@media(max-width:900px){.schedule-layout{grid-template-columns:1fr}#schedule-pdf-frame{height:60vh}}