.platform-shell{max-width:1240px;min-height:55vh}
.screen-error{padding:12px 16px;margin:16px 0;background:var(--danger-bg);color:var(--danger);border-radius:12px;font-size:14px}
.screen-error[hidden]{display:none}.user-nickname{font-size:12px;color:var(--muted);max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.header-inner>.main-nav{margin-left:auto}.header-actions{margin-left:16px}.main-nav>button{min-height:40px}
.platform-shell .part-title{display:block}.platform-shell .part-title p{margin-top:8px;color:var(--muted);font-size:13px}.part-context{font-weight:500;color:var(--foreground)!important}
.platform-shell .part-tabs{flex-wrap:wrap}.platform-shell .part-tab{min-height:44px}.platform-shell .part-title h2{font-size:18px}
.picture-exercise{grid-template-columns:minmax(0,1.7fr) minmax(260px,1fr)}.picture-stage{min-width:0;overflow:hidden;border-radius:12px;background:var(--surface)}
.picture-toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;font-size:14px}
.interactive-picture{display:block;width:100%;height:auto;max-width:100%;border-radius:12px;overflow:visible}
.match-picture{max-height:calc(100dvh - 260px)}.interactive-picture:not(.raster-art){fill:none;stroke:none;stroke-width:0}
.interactive-picture image{pointer-events:none}.interactive-picture [role=button]{cursor:pointer;outline:none}.person-hit{fill:transparent;stroke:transparent;stroke-width:3}
.interactive-picture [data-person]:focus-visible .person-hit{stroke:var(--primary);stroke-width:2}
.picture-link{stroke:var(--primary);stroke-width:4;fill:none;stroke-linecap:round;pointer-events:none;opacity:.72}.selected-link{stroke-width:6;opacity:1}.example-link{stroke:var(--muted);opacity:.5;stroke-width:3}.drag-preview{opacity:.9;stroke-dasharray:10 7}.drag-preview[hidden]{display:none}
.name-hit{fill:transparent;stroke:transparent;stroke-width:2}.name-hit.chosen{fill:var(--primary-light);stroke:var(--primary)}.name-text{font-family:var(--app-font);font-size:28px;font-weight:600;fill:var(--foreground);pointer-events:none}
.interactive-picture [data-name]:hover .name-hit,.interactive-picture [data-name]:focus-visible .name-hit{stroke:var(--primary);fill:var(--primary-light)}
.paint-picture{background:#fff}.paint-hit{stroke:transparent;stroke-width:2;cursor:crosshair}.paint-picture [data-region]:hover .paint-hit,.paint-picture [data-region]:focus-visible .paint-hit{stroke:#0869c7;stroke-width:3;stroke-dasharray:9 7}
.picture-word{font-family:var(--app-font);font-size:30px;font-weight:500;fill:#16375a;stroke:none;pointer-events:none}
.question-panel>h3{font-size:17px;margin-bottom:12px}.question-panel>p{color:var(--muted);font-size:13px;margin-bottom:16px}.picture-current{background:var(--primary-light);border-radius:12px;padding:12px;color:var(--foreground)!important}
.picture-tool-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.picture-tool-tabs .btn{min-height:40px}.picture-tool-tabs .selected{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
.picture-word-input{margin:0 0 12px!important;width:100%!important;font-size:16px}.word-entry-label{display:block;margin:16px 0 8px}.picture-zoom .interactive-picture{max-height:none}.picture-zoom{max-width:min(1100px,calc(100% - 32px))}
.word-bank{display:flex;gap:12px;flex-wrap:wrap;background:var(--primary-light);padding:20px;border-radius:12px;margin:20px 0}.word-bank span{padding:8px 16px;background:var(--surface);border-radius:8px;font-size:16px;color:var(--foreground)}
.question-art-gallery{display:grid;grid-template-columns:1fr 1fr;gap:16px}.question-art-gallery figure{margin:0;padding:16px;border:1px solid var(--border);border-radius:12px}.question-art-gallery figcaption{font-size:12px;color:var(--muted)}.question-art-gallery .raster-art{width:100%;height:140px;object-fit:contain;background:#fff}
.question-picture{width:100%;height:auto;border-radius:12px}.platform-shell .raster-art{overflow:hidden}.story-context{padding:12px 0;margin-bottom:12px;display:flex;flex-direction:column;gap:8px}.story-context strong{font-size:20px}.story-context span{font-size:13px;color:var(--muted)}
.option-art img.raster-art{position:absolute;inset:6px;width:calc(100% - 12px);height:calc(100% - 12px);object-fit:contain;background:#fff}
.catalog-v2 .cover img{object-fit:contain}.catalog-v2 .exam-card:hover .cover img{transform:none}
@media(max-width:767px){.intro-picture img{object-fit:contain;object-position:center}.option-art img.raster-art{inset:4px;width:calc(100% - 8px);height:calc(100% - 8px)}}
.writing-note{padding:12px 16px;background:var(--gold-light);border-radius:12px;margin-bottom:20px;font-size:13px}.writing-answer{min-height:120px;font-family:var(--app-font);font-size:16px;line-height:1.6;color:var(--foreground);background:var(--surface);border:1px solid var(--border-strong)}
.word-count{font-size:12px;color:var(--muted);padding:8px 0 0 32px}.save-status{font-size:12px;color:var(--muted)}
.dashboard-heading{margin:24px 0 32px}.dashboard-heading h1{font-size:26px;margin:8px 0 12px}.dashboard-heading p{color:var(--muted);font-size:14px}.dashboard-history,.leaderboard-section,.writing-result,.answer-review,.management-block{padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:16px;margin:24px 0}
.dashboard-history h2,.leaderboard-section h2,.writing-result h2,.answer-review h2,.management-block h2{font-size:20px;margin-bottom:16px}.leaderboard-section>p{font-size:13px;margin-bottom:20px}
.table-scroll{overflow:auto;max-width:100%;margin-top:16px}.results-table{width:100%;border-collapse:collapse;font-size:13px;text-align:left}.results-table th{font-size:12px;font-weight:500;color:var(--muted);white-space:nowrap}.results-table td,.results-table th{padding:12px;border-bottom:1px solid var(--border);vertical-align:top}.results-table tbody tr:hover{background:var(--primary-light)}.results-table td:first-child{min-width:100px}.results-table td .btn{min-height:36px;padding:6px 10px;font-size:12px}.results-table tbody tr:last-child td{border-bottom:0}
.board-controls{display:flex;gap:16px;align-items:end;flex-wrap:wrap}.board-controls label{font-size:12px;color:var(--muted);display:grid;gap:8px;min-width:180px;max-width:100%}.board-controls select{max-width:100%;height:44px;padding:8px 32px 8px 12px;border:1px solid var(--border-strong);border-radius:12px;background:var(--surface);color:var(--foreground);font-size:14px}
.empty-copy{padding:24px 0;color:var(--muted);font-size:14px}.result-note{color:var(--muted);font-size:13px;margin:16px 0 24px}.submitted-writing{padding:16px;background:var(--background);border-radius:12px;margin:16px 0;white-space:pre-wrap;overflow-wrap:anywhere}.submitted-writing h3{font-size:14px;margin-bottom:8px}.submitted-writing p{font-size:15px;line-height:1.7}
.writing-access{background:var(--gold-light);border-radius:12px;padding:20px;margin-top:24px}.writing-access p{font-size:13px;margin:8px 0 16px;color:var(--muted)}
.ai-feedback{margin:24px 0}.ai-feedback-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding-bottom:16px;border-bottom:1px solid var(--border)}.ai-feedback-heading h3{font-size:18px}.ai-feedback-heading span{font-size:12px;color:var(--primary)}.ai-feedback section{padding:16px 0;border-bottom:1px solid var(--border)}.ai-feedback h4{font-size:14px;margin:0 0 12px}.ai-feedback p{font-size:14px;line-height:1.7;margin:6px 0;white-space:pre-wrap;overflow-wrap:anywhere}.correction{padding:12px 16px;background:var(--background);border-radius:12px;margin-bottom:12px}.correction span{color:var(--muted);font-size:12px}.sample-writing{background:var(--primary-light);padding:16px;border-radius:12px}
.platform-shell details{margin:16px 0}.platform-shell details>summary{cursor:pointer;font-weight:500;padding:12px 0;color:var(--foreground)}.correct-mark{color:var(--success);font-size:12px}.incorrect-mark{color:var(--danger);font-size:12px}.answer-review .review-row{grid-template-columns:1fr 1fr auto;font-size:13px;overflow-wrap:anywhere}
.login-panel{max-width:440px;margin:24px auto}.login-panel h1{font-size:24px}.login-panel>p{color:var(--muted);font-size:13px;margin:12px 0 24px}.login-panel label,.management-form label,#password-form label{display:flex;flex-direction:column;gap:8px;margin-bottom:16px;font-size:13px}
.login-panel input,.management-form input,.management-form select,.management-form textarea,#password-form input{font:inherit;font-size:15px;color:var(--foreground);background:var(--surface);border:1px solid var(--border-strong);border-radius:12px;padding:10px 12px;min-height:44px;width:100%;min-width:0}.management-form textarea{min-height:100px;resize:vertical}.management-form{max-width:640px;padding:16px 0}.management-form fieldset{border:1px solid var(--border);border-radius:12px;margin:12px 0;padding:16px}.form-error{color:var(--danger);font-size:13px;min-height:20px;margin:12px 0}.management-block summary{font-size:17px}
@media(max-width:1000px){.header-actions{margin-left:0}.user-nickname{max-width:100px}.picture-exercise{grid-template-columns:minmax(0,1.3fr) minmax(230px,1fr)}}
@media(max-width:767px){.header-actions{margin-left:auto}.user-nickname{display:none}.picture-exercise{grid-template-columns:1fr}.match-picture{max-height:none}.name-text{font-size:44px}.picture-exercise .figure-panel{padding:12px}.picture-word{font-size:32px}.picture-exercise .question-panel{position:static}.platform-shell .part-tabs{flex-wrap:wrap;justify-content:flex-start}.platform-shell .part-tab{min-width:70px;flex:0 1 auto}.platform-shell .part-title h2{font-size:17px}.platform-shell .part-title p{font-size:13px}.dashboard-heading h1{font-size:23px}.dashboard-history,.leaderboard-section,.writing-result,.answer-review,.management-block{padding:16px;margin:20px 0}.results-table th,.results-table td{padding:10px 8px}.board-controls{display:block}.board-controls label{margin-bottom:12px}.board-controls select{font-size:16px;width:100%}.writing-answer{font-size:16px}.question-art-gallery{grid-template-columns:1fr 1fr}.answer-review .review-row{grid-template-columns:1fr}.question-panel .colour-palette{display:grid;grid-template-columns:1fr 1fr;gap:8px}.colour-choice{justify-content:flex-start}.word-count{padding-left:32px}.platform-shell .audio-label{min-width:140px}.management-form input,.management-form select,.management-form textarea,.login-panel input,#password-form input{font-size:16px}.lead-signin{font-size:12px!important;text-align:center;justify-content:center;width:100%;margin-top:8px!important}.header-actions .btn{font-size:12px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}