/* C30.7 · Material Library UI Consolidation */
.c307-material-body{padding:0 10px 10px}.c307-type-tabs{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:2px 0 8px}.c307-type-tabs button{border:1px solid #dce4eb;background:#f7f9fb;border-radius:9px;padding:8px 9px;display:flex;align-items:center;justify-content:space-between;gap:8px;color:#5b6a78;font:600 9px/1.2 Montserrat,Arial,sans-serif;cursor:pointer}.c307-type-tabs button small{font-size:8px;font-weight:700;color:#8a96a2}.c307-type-tabs button.is-active{background:#fff;border-color:#97bae2;color:#17253f;box-shadow:0 0 0 1px rgba(151,186,226,.18)}.c307-type-summary{display:flex;justify-content:space-between;gap:10px;align-items:center;padding:0 2px 7px;color:#71808f;font-size:8px}.c307-type-summary span{font-weight:700;color:#17253f}.c307-explorer{display:grid;grid-template-columns:minmax(142px,.88fr) minmax(0,1.65fr);gap:8px;align-items:start}.c307-folder-pane,.c307-material-content{border:1px solid #dfe5eb;border-radius:10px;background:#fbfcfd;min-width:0}.c307-folder-pane{padding:7px;display:grid;gap:8px;max-height:610px;overflow:auto;position:sticky;top:8px}.c307-pane-label{font-size:8px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#8a96a2;padding:1px 3px}.c307-scope-folders{display:grid;gap:4px}.c307-scope-folder-head{display:grid;grid-template-columns:7px minmax(0,1fr) 22px;align-items:center;gap:5px;padding:4px 3px 2px}.c307-scope-folder-head>span{width:7px;height:7px;border-radius:50%;background:var(--scope-color)}.c307-scope-folder-head strong{font-size:8px;color:#5a6875;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.c307-scope-folder-head>button{border:0;background:transparent;color:#667583;cursor:pointer;font-size:12px;padding:0}.c307-root-target{border:1px solid transparent;border-radius:7px}.c307-root-target>button{width:100%;border:0;background:transparent;padding:6px 7px;display:flex;justify-content:space-between;gap:8px;color:#42515e;font:600 9px/1.2 Montserrat,Arial,sans-serif;cursor:pointer;text-align:left}.c307-root-target small,.c307-folder-select small{font-size:7.5px;color:#8c98a3;font-weight:700}.c307-root-target.is-selected{background:#eef4f8;border-color:#d4e1ea}.c307-folder-tree{display:grid;gap:2px}.c307-folder-empty{font-size:8px;color:#909aa4;padding:7px}.c307-folder-node{display:grid;gap:1px}.c307-folder-row{display:grid;grid-template-columns:14px 14px minmax(0,1fr) 18px 20px;gap:2px;align-items:center;border:1px solid transparent;border-radius:7px;padding:2px 3px 2px calc(2px + var(--c307-depth)*7px)}.c307-folder-node.is-selected>.c307-folder-row{background:#eef4f8;border-color:#d4e1ea}.c307-folder-row:hover{background:#f3f6f8}.c307-folder-grip,.c307-folder-toggle,.c307-folder-action{border:0;background:transparent;color:#80909e;padding:0;cursor:pointer;font-size:9px;line-height:20px;height:20px}.c307-folder-grip{cursor:grab;font-size:8px}.c307-folder-toggle:disabled{opacity:.35;cursor:default}.c307-folder-action{font-size:9px}.c307-folder-drop-target{min-width:0;border-radius:5px}.c307-folder-drop-target.folder-drop-active{outline:2px solid color-mix(in srgb,var(--folder-color) 45%,transparent);outline-offset:-2px}.c307-folder-select{width:100%;border:0;background:transparent;padding:4px 3px;display:flex;align-items:center;justify-content:space-between;gap:6px;min-width:0;color:#354553;font:500 9px/1.2 Montserrat,Arial,sans-serif;cursor:pointer;text-align:left}.c307-folder-select span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.c307-folder-children{display:grid;gap:1px}.c307-folder-node.is-collapsed>.c307-folder-children{display:none}.c307-material-content{padding:9px;background:#fff;display:grid;gap:8px;min-height:180px}.c307-content-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;border-bottom:1px solid #e5ebf0;padding:2px 2px 8px}.c307-content-head>div:first-child{display:grid;gap:1px;min-width:0}.c307-content-head small{font-size:7.5px;color:#8a96a2;text-transform:uppercase;letter-spacing:.06em}.c307-content-head h4{font-size:11px;color:#17253f;margin:0}.c307-content-head span{font-size:7.5px;color:#7f8b96;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.c307-content-actions{display:flex;gap:4px;flex-wrap:wrap;justify-content:flex-end}.c307-content-actions .button{font-size:7.5px;padding:5px 6px}.c307-content-drop{min-height:31px}.c307-material-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(155px,1fr));gap:7px;align-items:start}.c307-material-grid .c2891-material-card{margin:0;min-width:0}.c307-content-empty{grid-column:1/-1;min-height:110px;border:1px dashed #d6dee5;border-radius:8px;display:grid;place-content:center;gap:4px;text-align:center;padding:18px;color:#82909d;font-size:8px}.c307-content-empty strong{font-size:9px;color:#526170}.c307-folder-node.folder-reorder-before>.c307-folder-row{box-shadow:inset 0 2px #97bae2}.c307-folder-node.folder-reorder-after>.c307-folder-row{box-shadow:inset 0 -2px #97bae2}.c307-root-target.folder-drop-active{outline:2px solid #97bae2}.c2891-standalone-grid .c307-explorer{grid-template-columns:minmax(220px,.55fr) minmax(0,2fr)}.c2891-standalone-grid .c307-material-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
@media(max-width:1000px){.c307-explorer,.c2891-standalone-grid .c307-explorer{grid-template-columns:1fr}.c307-folder-pane{position:static;max-height:280px}.c307-material-grid,.c2891-standalone-grid .c307-material-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}}
@media(max-width:620px){.c307-type-tabs{grid-template-columns:1fr}.c307-content-head{display:grid}.c307-content-actions{justify-content:flex-start}.c307-material-grid,.c2891-standalone-grid .c307-material-grid{grid-template-columns:1fr}}
/* Narrow right-panel composition: use vertical hierarchy instead of squeezing two panes. */
.library-panel .c307-explorer{grid-template-columns:1fr}.library-panel .c307-folder-pane{position:static;max-height:250px}.library-panel .c307-material-grid{grid-template-columns:1fr}.library-panel .c307-content-head{display:grid}.library-panel .c307-content-actions{justify-content:flex-start}.library-panel .c307-content-head span{white-space:normal}.library-panel .c307-material-card{max-width:100%;overflow:hidden}.library-panel .c2891-material-actions{gap:3px}.library-panel .c2891-material-actions button{padding:3px 4px}.library-panel .c307-type-summary{align-items:flex-start;flex-direction:column;gap:2px}


/* === C31.1.2 · VISUAL MATERIAL LIBRARY UX HARDENING === */
.c307-content-toolbar{display:flex;align-items:center;justify-content:flex-end;gap:10px;flex-wrap:wrap}
.c3111-view-toggle{display:inline-flex;padding:3px;border:1px solid #dce4eb;border-radius:10px;background:#f6f8fa;gap:3px}
.c3111-view-toggle button{min-height:30px;border:0;background:transparent;border-radius:8px;padding:7px 10px;color:#778694;font:600 10px/1 Montserrat,Arial,sans-serif;cursor:pointer;display:inline-flex;align-items:center;gap:5px}
.c3111-view-toggle button.is-active{background:#fff;color:#17253f;box-shadow:0 1px 3px rgba(23,37,63,.10)}
.c307-content-actions .button{font-size:9.5px;padding:7px 9px;min-height:31px}
.c307-content-drop{min-height:44px;font-size:9.5px;padding:8px 10px}

/* Stable visual rhythm: cards stay recognisable without ballooning on 1440px. */
.c307-material-grid.is-grid{grid-template-columns:repeat(auto-fill,minmax(205px,1fr));gap:12px}
.c2891-standalone-grid .c307-material-grid.is-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.c3111-material-card{padding:0;border:1px solid #dfe5eb;border-left:1px solid #dfe5eb;border-radius:14px;overflow:visible;background:#fff;cursor:grab;gap:0;box-shadow:0 1px 2px rgba(23,37,63,.035);position:relative;transition:border-color .16s ease,box-shadow .16s ease,transform .16s ease}
.c3111-material-card:hover{border-color:#cbd8e3;box-shadow:0 7px 22px rgba(23,37,63,.08);transform:translateY(-1px)}
.c3111-material-preview{position:relative;width:100%;height:0;padding:0 0 68%;border:0;border-radius:13px 13px 0 0;background:#eef1f3;overflow:hidden;cursor:pointer;display:block}
.c3111-material-preview>img,.c3111-live-preview,.c3111-live-preview>img,.c3111-live-preview>iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.c3111-material-preview>img,.c3111-live-preview>img{object-fit:contain;background:#f0f1f2;padding:10px;box-sizing:border-box}
.c3111-live-preview>iframe{pointer-events:none;background:#f1f2f3}
.c3111-preview-hit{position:absolute;inset:0;border:0;background:transparent;cursor:pointer;z-index:4}
.c3111-preview-hover{position:absolute;inset:auto 11px 11px;display:flex;align-items:center;justify-content:center;min-height:32px;border-radius:8px;background:rgba(23,37,63,.88);color:#fff;font:600 10px/1 Montserrat,Arial,sans-serif;opacity:0;transform:translateY(3px);transition:.15s ease;pointer-events:none;z-index:5}
.c3111-material-preview:hover .c3111-preview-hover,.c3111-material-preview:focus-visible .c3111-preview-hover,.c3111-preview-hit:focus-visible~.c3111-preview-hover{opacity:1;transform:none}
.c3111-material-preview:focus-visible,.c3111-preview-hit:focus-visible{outline:3px solid rgba(151,186,226,.6);outline-offset:-3px}

.c3111-card-body{padding:12px 12px 13px;display:grid;gap:8px;min-width:0}
.c3111-card-title-row{display:grid;grid-template-columns:minmax(0,1fr) 32px;gap:7px;align-items:start}
.c3111-card-title-row>div:first-child{min-width:0}
.c3111-type-kicker{display:block;color:#8996a3;font-size:8.7px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;margin-bottom:5px}
.c3111-material-card h4{font-size:12.5px;line-height:1.28;min-height:32px;margin:0;color:#17253f;font-weight:600}
.c3111-meta{display:flex;gap:6px;flex-wrap:wrap}
.c3111-meta span{border-radius:999px;background:#f0f4f6;color:#62717e;padding:4px 7px;font-size:9px;font-weight:600}
.c3111-list-description,.c3111-list-extra{display:none}
.c3111-card-footer{display:flex;align-items:center;gap:7px}
.c3111-primary-action{width:100%;min-height:33px;border:1px solid #cfdae3;background:#fff;color:#294352;border-radius:9px;padding:8px 10px;font:600 10.5px/1.1 Montserrat,Arial,sans-serif;cursor:pointer}
.c3111-primary-action:hover{border-color:#97bae2;background:#f6f9fb}
.c3111-card-menu{position:relative;z-index:6}
.c3111-card-menu>summary{list-style:none;width:32px;height:32px;display:grid;place-items:center;border-radius:8px;color:#71808d;cursor:pointer;font-size:12px;letter-spacing:1px}
.c3111-card-menu>summary::-webkit-details-marker{display:none}
.c3111-card-menu>summary:hover,.c3111-card-menu[open]>summary{background:#f0f4f6;color:#17253f}
.c3111-card-menu-popover{position:absolute;top:36px;right:0;width:170px;padding:6px;border:1px solid #dce3e9;border-radius:10px;background:#fff;box-shadow:0 12px 32px rgba(23,37,63,.16);display:grid;gap:2px;z-index:30}
.c3111-card-menu-popover button{border:0;background:transparent;border-radius:7px;padding:8px 9px;text-align:left;color:#3c4b59;font:500 10px/1.25 Montserrat,Arial,sans-serif;cursor:pointer}
.c3111-card-menu-popover button:hover{background:#f1f5f7}
.c3111-card-menu-popover button.is-danger{color:#9b4f4d}
.c3111-menu-separator{height:1px;background:#edf0f2;margin:3px 4px}

.c3111-preview-skeleton{position:absolute;inset:12px 20%;border-radius:5px;background:#fff;box-shadow:0 1px 8px rgba(23,37,63,.08);padding:17px 12px;display:grid;align-content:start;gap:9px}
.c3111-preview-skeleton i{height:5px;border-radius:999px;background:#e7ebee}.c3111-preview-skeleton i:nth-child(2){width:80%}.c3111-preview-skeleton i:nth-child(3){width:58%}
.c3111-preview-unavailable{position:absolute;inset:0;display:grid;place-content:center;text-align:center;gap:7px;color:#84919c;font:500 9.5px/1.25 Montserrat,Arial,sans-serif}
.c3111-preview-unavailable b{font-size:26px;font-weight:400;color:#a5b0ba}
.c3111-preview-fallback{display:grid;place-content:center;text-align:center;gap:6px;color:#778592;font:600 9px/1.25 Montserrat,Arial,sans-serif}
.c3111-file-icon{font-size:32px;color:#96a5b2}.c3111-preview-fallback small{font-size:8.5px;font-weight:500;color:#98a3ac}

/* Live previews are derived from the current native/template renderer, not stale screenshots. */
.c3112-native-render,.c3112-template-render{position:absolute;inset:0;overflow:hidden;background:#eef1f3;pointer-events:none}
.c3112-native-render .worksheet-editor{position:absolute;left:50%;top:50%;width:900px;transform:translate(-50%,-50%) scale(.245);transform-origin:center;background:#fff;padding:24px;box-shadow:0 2px 12px rgba(23,37,63,.08)}
.c3112-native-render input,.c3112-native-render textarea{font-size:12px}
.c3112-template-render .c3000-preview-shell{position:absolute;left:50%;top:50%;width:1060px;transform:translate(-50%,-50%) scale(.245);transform-origin:center;padding:0;overflow:hidden}
.c3112-template-render .c3000-template-preview{width:1060px!important;min-width:1060px!important;max-width:none!important;box-shadow:none}

/* Administrative list mode: document left, useful details center, one action right. */
.c307-material-grid.is-list{display:grid;grid-template-columns:1fr;gap:8px}
.c307-material-grid.is-list .c3111-material-card{display:grid;grid-template-columns:112px minmax(0,1fr);min-height:120px}
.c307-material-grid.is-list .c3111-material-preview{height:100%;min-height:120px;padding:0;border-radius:13px 0 0 13px}
.c307-material-grid.is-list .c3111-card-body{padding:11px 13px;grid-template-columns:minmax(0,1fr) 145px;grid-template-areas:"title action" "description action" "meta action" "extra action";column-gap:16px;row-gap:5px;align-content:center}
.c307-material-grid.is-list .c3111-card-title-row{grid-area:title}.c307-material-grid.is-list .c3111-material-card h4{min-height:0;font-size:12px}
.c307-material-grid.is-list .c3111-list-description{grid-area:description;display:block;margin:0;color:#6c7985;font-size:9.5px;line-height:1.4;max-width:760px}
.c307-material-grid.is-list .c3111-meta{grid-area:meta}.c307-material-grid.is-list .c3111-list-extra{grid-area:extra;display:block;color:#8a96a2;font-size:9px}
.c307-material-grid.is-list .c3111-card-footer{grid-area:action;width:145px;align-self:center}

/* Narrow right project panel: readable compact object, not miniaturised desktop UI. */
.library-panel .c307-material-grid.is-grid,.library-panel .c307-material-grid.is-list{display:grid;grid-template-columns:1fr;gap:9px}
.library-panel .c3111-material-card{display:grid;grid-template-columns:96px minmax(0,1fr);min-height:124px;transform:none}
.library-panel .c3111-material-preview{height:100%;min-height:124px;padding:0;border-radius:13px 0 0 13px}
.library-panel .c3111-card-body{padding:9px 10px;gap:6px}
.library-panel .c3111-material-card h4{min-height:0;font-size:11.5px;line-height:1.25}
.library-panel .c3111-type-kicker{font-size:8.3px;margin-bottom:4px}
.library-panel .c3111-meta{gap:4px}.library-panel .c3111-meta span{font-size:8.5px;padding:3px 6px}
.library-panel .c3111-primary-action{min-height:31px;padding:7px 8px;font-size:9.8px}
.library-panel .c3111-card-menu>summary{width:30px;height:30px}
.library-panel .c3111-list-description,.library-panel .c3111-list-extra{display:none}
.library-panel .c3111-preview-hover{display:none}.library-panel .c3111-view-toggle{display:none}
.library-panel .c307-content-toolbar{justify-content:flex-start}.library-panel .c3112-native-render .worksheet-editor{transform:translate(-50%,-50%) scale(.16)}
.library-panel .c3112-template-render .c3000-preview-shell{transform:translate(-50%,-50%) scale(.16)}
.library-panel .c3111-card-menu-popover{right:0;width:158px}

@media(max-width:1280px){.c2891-standalone-grid .c307-material-grid.is-grid{grid-template-columns:repeat(auto-fill,minmax(218px,1fr))}}
@media(max-width:1100px){.c2891-standalone-grid .c307-material-grid.is-grid{grid-template-columns:repeat(auto-fill,minmax(205px,1fr))}}
@media(max-width:720px){.c307-content-toolbar{align-items:flex-start;justify-content:flex-start}.c3111-view-toggle button span{display:none}.c307-material-grid.is-grid,.c2891-standalone-grid .c307-material-grid.is-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr))}.c307-material-grid.is-list .c3111-card-body{grid-template-columns:1fr;grid-template-areas:"title" "description" "meta" "extra" "action"}.c307-material-grid.is-list .c3111-card-footer{width:100%}}
@media(max-width:520px){.c307-material-grid.is-grid,.c2891-standalone-grid .c307-material-grid.is-grid{grid-template-columns:1fr}.c3111-material-preview{padding-bottom:64%}.c307-material-grid.is-list .c3111-material-card{grid-template-columns:88px minmax(0,1fr)}}
/* === END C31.1.2 === */