.resource-viewer-body{background:#f6f8fb}.resource-viewer-shell{min-height:100vh}.resource-viewer-topbar{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 0;border-bottom:1px solid #e7ebf0}.resource-viewer-topbar>div{display:flex;gap:14px;flex-wrap:wrap}.resource-viewer-topbar a{text-decoration:none;color:#5d6674;font-size:13px}.resource-viewer-topbar a:hover{color:#e31667}.resource-viewer-brand{display:flex;align-items:center;gap:10px}.resource-viewer-brand span{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#00a9d6,#e31667);color:#fff;font-weight:900}.resource-viewer-brand strong{font-size:16px;color:#263243}.resource-viewer-main{max-width:1180px;margin:0 auto;padding:30px 0 10px}.resource-viewer-head{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:26px;align-items:start;padding:26px;border:1px solid #e5e9ef;border-radius:22px;background:#fff;box-shadow:0 12px 34px rgba(35,52,75,.055)}.resource-viewer-head h1{margin:7px 0 10px;font-size:clamp(28px,4vw,42px);line-height:1.08}.resource-viewer-head p{margin:0;color:#637080;line-height:1.65}.resource-viewer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.resource-viewer-tags span,.read-only-chip{display:inline-flex;align-items:center;border-radius:999px;padding:7px 10px;background:#f1f5f8;color:#546577;font-size:10px;font-weight:800;letter-spacing:.04em}.read-only-chip{background:#fff0f6;color:#cf1765}.resource-viewer-head aside{padding:18px;border-radius:16px;background:linear-gradient(145deg,#f7fbfd,#fff7fa)}.resource-viewer-head aside strong,.resource-viewer-head aside small{display:block;overflow-wrap:anywhere}.resource-viewer-head aside small{margin-top:6px;color:#788493}.resource-viewer-head aside p{margin-top:14px;font-size:12px;line-height:1.55}.resource-viewer-file-card .btn{display:flex;justify-content:center;width:100%;margin-top:14px}.resource-download-cta{border-color:#e31667;background:linear-gradient(135deg,#e31667,#b9168f);color:#fff;box-shadow:0 9px 20px rgba(227,22,103,.18)}.resource-download-cta:hover{filter:brightness(.97);transform:translateY(-1px)}.resource-teacher-login-cta{border-color:#cfd8e2;background:#fff;color:#3d4b5c}.resource-teacher-login-cta:hover{border-color:#e8a7c5;color:#c81762;background:#fff7fb}.teacher-benefit-chip{display:inline-flex;margin-top:14px;padding:6px 9px;border-radius:999px;background:#eafaf3;color:#167650;font-size:10px;font-weight:900;letter-spacing:.05em}.resource-privilege-note{display:block;margin-top:12px;padding:9px 10px;border-radius:10px;background:#fff7e9;color:#8a6730;font-size:11px;line-height:1.45}.resource-preview-panel{margin-top:22px;padding:22px;border:1px solid #e5e9ef;border-radius:22px;background:#fff;box-shadow:0 10px 30px rgba(35,52,75,.04)}.resource-preview-panel-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}.resource-preview-panel-head h2{margin:5px 0 0;font-size:22px}.pdf-frame-wrap{overflow:hidden;border:1px solid #dfe5eb;border-radius:16px;background:#e9edf2}.pdf-frame-wrap iframe{display:block;width:100%;height:min(78vh,980px);min-height:640px;border:0;background:#e9edf2}.resource-preview-note,.resource-preview-limit{margin:12px 0 0;padding:10px 12px;border-radius:11px;background:#fff9ec;color:#746342;font-size:11px;line-height:1.55}.docx-preview{max-width:900px;margin:0 auto;padding:36px 42px;border:1px solid #edf0f3;border-radius:16px;background:#fff;box-shadow:0 8px 25px rgba(0,0,0,.025)}.docx-preview p{margin:0 0 12px;color:#273243;line-height:1.7;white-space:pre-wrap}.resource-sheet-scroll{width:100%;overflow:auto;border:1px solid #e2e7ec;border-radius:12px;background:#fff}.resource-sheet-table{width:max-content;min-width:100%;border-collapse:collapse;font-size:12px}.resource-sheet-table th,.resource-sheet-table td{min-width:120px;max-width:320px;padding:9px 10px;border-right:1px solid #edf0f3;border-bottom:1px solid #edf0f3;vertical-align:top;white-space:pre-wrap;overflow-wrap:anywhere}.resource-sheet-table th{position:sticky;top:0;background:#f6f8fa;color:#445263;font-weight:800}.xlsx-sheet-tabs{display:flex;gap:7px;overflow-x:auto;padding:2px 2px 10px;scrollbar-width:thin}.xlsx-sheet-tab{flex:0 0 auto;display:inline-flex;align-items:center;min-height:38px;padding:8px 13px;border:1px solid #dfe5eb;border-radius:10px;background:#f8fafc;color:#596777;text-decoration:none;font-size:12px;font-weight:800;white-space:nowrap}.xlsx-sheet-tab:hover{border-color:#e8a7c5;color:#c81762;background:#fff7fb}.xlsx-sheet-tab.is-active{border-color:#e31667;background:#fff0f6;color:#c5125d;box-shadow:0 4px 12px rgba(227,22,103,.09)}.xlsx-active-sheet{margin-top:4px}.xlsx-active-sheet-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px;padding:0 2px}.xlsx-active-sheet-head strong{font-size:14px;color:#344253}.xlsx-active-sheet-head span{font-size:11px;color:#7a8794}.text-preview{max-height:75vh;overflow:auto;margin:0;padding:22px;border-radius:14px;background:#111827;color:#e5edf7;font:12px/1.7 ui-monospace,SFMono-Regular,Menlo,monospace;white-space:pre-wrap}.resource-preview-empty{padding:28px;border:1px dashed #d9e0e6;border-radius:15px;background:#fafcfd;text-align:center;color:#657282;line-height:1.65}.resource-preview-empty strong{display:block;margin-bottom:8px;color:#2d3948;font-size:16px}.resource-viewer-fail{max-width:700px;margin:90px auto;padding:32px;border:1px solid #e4e8ed;border-radius:22px;background:#fff}.resource-viewer-fail span{font-size:11px;font-weight:800;letter-spacing:.12em;color:#be2466}.resource-viewer-fail h1{margin:8px 0 10px}.resource-viewer-fail p{color:#657282;line-height:1.6}.resource-viewer-fail a{margin-top:14px}@media(max-width:820px){.resource-viewer-main{padding-top:20px}.resource-viewer-head{grid-template-columns:1fr;padding:20px}.resource-viewer-head aside{padding:14px}.resource-preview-panel{padding:15px}.docx-preview{padding:24px 18px}.pdf-frame-wrap iframe{min-height:520px;height:70vh}.resource-viewer-topbar{align-items:flex-start;flex-direction:column}.xlsx-active-sheet-head{align-items:flex-start;flex-direction:column}}