/* ===== 全局 ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#7c3aed;--primary-light:#a78bfa;--bg:#f5f3ff;--card:#fff;--text:#1e1b4b;--text-light:#6b7280;--border:#e5e7eb;--success:#10b981;--danger:#ef4444;--warning:#f59e0b}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);height:100vh;min-height:100vh;overflow:hidden;display:flex;flex-direction:column}

/* ===== 顶部栏 ===== */
.header{background:linear-gradient(135deg,#7c3aed,#6d28d9);color:#fff;padding:10px 24px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.header h1{font-size:18px;font-weight:600;letter-spacing:1px}
.header-actions{display:flex;gap:12px}
.header-actions button{background:rgba(255,255,255,.2);color:#fff;border:1px solid rgba(255,255,255,.3);border-radius:6px;padding:6px 16px;cursor:pointer;font-size:13px;transition:background .2s}
.header-actions button:hover{background:rgba(255,255,255,.35)}
.header-actions .account-chip{display:inline-flex;align-items:center;font-size:13px;color:#fff;opacity:.95}

/* ===== 主布局 ===== */
.main{display:flex;flex:1;min-height:0}
.left-panel{flex:1;display:flex;flex-direction:column;border-right:1px solid var(--border);min-width:0}
.right-panel{width:400px;display:flex;flex-direction:column;overflow-y:auto;background:var(--card)}

/* ===== 浏览器区域 ===== */
.browser-section{flex:1;display:flex;flex-direction:column;min-height:0}
.browser-toolbar{display:flex;align-items:center;gap:8px;padding:8px 12px;background:#fafafa;border-bottom:1px solid var(--border);flex-wrap:wrap}
.browser-toolbar input[type=text]{flex:1;min-width:200px;padding:6px 12px;border:1px solid var(--border);border-radius:6px;font-size:13px;outline:none}
.browser-toolbar input[type=text]:focus{border-color:var(--primary)}
.browser-toolbar button{padding:6px 14px;border:none;border-radius:6px;cursor:pointer;font-size:13px;transition:all .2s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:#6d28d9}
.btn-success{background:var(--success);color:#fff}
.btn-success:hover{background:#059669}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#dc2626}
.btn-secondary{background:#e5e7eb;color:var(--text)}
.btn-secondary:hover{background:#d1d5db}
.btn-outline{background:transparent;color:var(--primary);border:1px solid var(--primary) !important}
.btn-outline:hover{background:var(--primary);color:#fff}

/* ===== 浏览器视口 ===== */
.browser-viewport{flex:1;position:relative;overflow:hidden;background:#e5e7eb;display:flex;align-items:center;justify-content:center}
.browser-viewport img{max-width:100%;max-height:100%;object-fit:contain;display:none;user-select:none;-webkit-user-drag:none;cursor:pointer}
.browser-viewport .placeholder{color:var(--text-light);font-size:14px;text-align:center;padding:20px;line-height:1.8}

/* 输入法宿主：不可见但可聚焦，位置跟随点击处，让中文候选框出现在鼠标附近 */
#im-bridge{position:absolute;left:0;top:0;width:2px;height:18px;padding:0;margin:0;
  border:0;outline:none;resize:none;overflow:hidden;background:transparent;
  color:transparent;caret-color:transparent;opacity:0;z-index:80;pointer-events:none}

/* ===== 框选覆盖层 ===== */
.overlay-container{position:absolute;inset:0;z-index:50;pointer-events:none;display:none}
.overlay-container.active{display:block}

/* 半透明遮罩 */
.overlay-mask{position:absolute;background:rgba(0,0,0,0.45);pointer-events:none;transition:none}
.overlay-mask.top{top:0;left:0;right:0}
.overlay-mask.bottom{bottom:0;left:0;right:0}
.overlay-mask.left{left:0}
.overlay-mask.right{right:0}

/* 框选区域本身 */
.overlay-selection{position:absolute;border:2px solid rgba(255,255,255,0.9);pointer-events:all;cursor:move;box-shadow:0 0 0 1px rgba(0,0,0,0.3)}
.overlay-selection::before{content:'';position:absolute;inset:-1px;border:2px solid var(--primary);pointer-events:none}

/* 拖拽手柄 */
.overlay-handle{position:absolute;background:#fff;border:2px solid var(--primary);border-radius:2px;pointer-events:all;z-index:60}
.overlay-handle.corner{width:10px;height:10px}
.overlay-handle.corner.tl{top:-5px;left:-5px;cursor:nw-resize}
.overlay-handle.corner.tr{top:-5px;right:-5px;cursor:ne-resize}
.overlay-handle.corner.bl{bottom:-5px;left:-5px;cursor:sw-resize}
.overlay-handle.corner.br{bottom:-5px;right:-5px;cursor:se-resize}
.overlay-handle.edge{z-index:61}
.overlay-handle.edge.top-mid{top:-4px;left:50%;transform:translateX(-50%);width:16px;height:8px;cursor:n-resize;border-radius:3px}
.overlay-handle.edge.bottom-mid{bottom:-4px;left:50%;transform:translateX(-50%);width:16px;height:8px;cursor:s-resize;border-radius:3px}
.overlay-handle.edge.left-mid{left:-4px;top:50%;transform:translateY(-50%);width:8px;height:16px;cursor:w-resize;border-radius:3px}
.overlay-handle.edge.right-mid{right:-4px;top:50%;transform:translateY(-50%);width:8px;height:16px;cursor:e-resize;border-radius:3px}

/* 坐标标注 */
.overlay-label{position:absolute;background:var(--primary);color:#fff;font-size:11px;padding:2px 8px;border-radius:10px;pointer-events:none;white-space:nowrap;z-index:62;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%)}

/* 点标记(分数框、提交按钮) */
.coord-dot{position:absolute;width:12px;height:12px;border-radius:50%;transform:translate(-50%,-50%);z-index:55;pointer-events:all;cursor:crosshair;border:2px solid #fff;box-shadow:0 0 4px rgba(0,0,0,.4)}
.coord-dot.score{background:var(--warning)}
.coord-dot.submit{background:var(--success)}
.coord-dot-label{position:absolute;background:rgba(0,0,0,.75);color:#fff;font-size:10px;padding:1px 6px;border-radius:6px;pointer-events:none;white-space:nowrap;top:calc(100% + 4px);left:50%;transform:translateX(-50%)}

/* ===== 右侧面板 ===== */
.panel-section{padding:14px;border-bottom:1px solid var(--border)}
.panel-title{font-size:13px;font-weight:600;color:var(--primary);margin-bottom:10px;display:flex;align-items:center;justify-content:space-between}
.panel-title .badge{font-size:11px;background:var(--primary-light);color:#fff;padding:2px 8px;border-radius:10px}

/* ===== 表单控件 ===== */
.form-row{display:flex;gap:8px;margin-bottom:8px;align-items:center}
.form-row label{font-size:12px;color:var(--text-light);min-width:55px;text-align:right;flex-shrink:0}
.form-row select,.form-row input{flex:1;padding:5px 8px;border:1px solid var(--border);border-radius:4px;font-size:12px;outline:none}
.form-row select:focus,.form-row input:focus{border-color:var(--primary)}
textarea{width:100%;padding:6px 8px;border:1px solid var(--border);border-radius:4px;font-size:12px;resize:vertical;min-height:48px;outline:none;font-family:inherit}
textarea:focus{border-color:var(--primary)}

/* ===== 阅卷控制 ===== */
.grading-controls{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.grading-controls button{flex:1;min-width:70px;padding:7px 10px;border:none;border-radius:6px;cursor:pointer;font-size:12px;font-weight:500;transition:all .2s}
.progress-bar{width:100%;height:6px;background:#e5e7eb;border-radius:3px;overflow:hidden;margin-top:8px}
.progress-bar .fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-light));border-radius:3px;transition:width .5s}
.status-text{font-size:11px;color:var(--text-light);margin-top:4px}

/* ===== 评分结果 ===== */
.result-card{background:#fafafa;border-radius:6px;padding:10px;margin-top:6px;border-left:4px solid var(--primary)}
.result-card .score{font-size:24px;font-weight:700;color:var(--primary)}
.result-card .max{font-size:13px;color:var(--text-light)}
.result-card .reasoning{font-size:12px;color:var(--text);margin-top:4px;line-height:1.5}
.result-card .keywords{display:flex;flex-wrap:wrap;gap:3px;margin-top:4px}
.result-card .keywords span{font-size:10px;background:var(--primary);color:#fff;padding:1px 6px;border-radius:8px}

/* ===== 坐标信息 ===== */
.coord-info{font-size:11px;color:#6b7280;line-height:1.8}
.coord-info span{font-family:monospace;background:#f3f4f6;padding:1px 4px;border-radius:3px;font-size:10px}

/* ===== 状态指示 ===== */
.status-dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:4px}
.status-dot.running{background:var(--success);animation:pulse 1s infinite}
.status-dot.idle{background:var(--text-light)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}

/* ===== 工具提示 ===== */
.toolbar-hint{padding:4px 12px;background:#fef3c7;border-top:1px solid #fcd34d;font-size:11px;color:#92400e;display:none}
.toolbar-hint.active{display:block}

/* ===== 点击动画 ===== */
.interact-click-marker{position:absolute;width:24px;height:24px;border:2px solid var(--success);border-radius:50%;transform:translate(-50%,-50%);pointer-events:none;z-index:70;animation:clickPulse 0.6s ease-out forwards}
@keyframes clickPulse{0%{opacity:1;transform:translate(-50%,-50%) scale(0.3)}100%{opacity:0;transform:translate(-50%,-50%) scale(1.5)}}

/* ===== 响应式 ===== */
@media(max-width:900px){.main{flex-direction:column}.right-panel{width:100%;max-height:50vh}}

/* ===== 本机阅卷引导 ===== */
.header-actions .btn-local{background:#fff;color:#6d28d9;border:1px solid #fff;font-weight:600}
.header-actions .btn-local:hover{background:#f3e8ff;color:#5b21b6}
.kg-guide-mask{position:fixed;inset:0;background:rgba(17,24,39,.55);z-index:9999;display:none;align-items:center;justify-content:center;padding:24px}
.kg-guide-mask.active{display:flex}
.kg-guide{background:#fff;border-radius:14px;width:100%;max-width:560px;max-height:86vh;overflow-y:auto;box-shadow:0 24px 60px rgba(0,0,0,.28);padding:26px 28px 22px}
.kg-guide h2{margin:0 0 6px;font-size:20px;color:#111827;display:flex;align-items:center;gap:8px}
.kg-guide .kg-guide-sub{font-size:13px;color:#6b7280;margin-bottom:18px;line-height:1.7}
.kg-guide .kg-why{background:#f5f3ff;border:1px solid #ddd6fe;border-radius:10px;padding:12px 14px;font-size:13px;color:#4c1d95;line-height:1.8;margin-bottom:18px}
.kg-guide .kg-why b{color:#6d28d9}
.kg-step{display:flex;gap:12px;margin-bottom:14px}
.kg-step .kg-num{flex:none;width:24px;height:24px;border-radius:50%;background:#6d28d9;color:#fff;font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:center;margin-top:1px}
.kg-step .kg-text{font-size:13px;color:#374151;line-height:1.7}
.kg-step .kg-text b{color:#111827}
.kg-step code{background:#f3f4f6;padding:1px 6px;border-radius:4px;font-size:12px;color:#6d28d9;font-family:ui-monospace,Consolas,monospace}
.kg-guide .kg-sec-title{margin:22px 0 14px;padding-top:16px;border-top:1px dashed #e5e7eb;font-size:14px;font-weight:600;color:#111827;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.kg-guide .kg-sec-title small{font-weight:500;font-size:12px;color:#6b7280}
.kg-guide .kg-tip{margin:12px 0 0;padding:10px 12px;background:#fffbeb;border:1px solid #fde68a;border-radius:8px;font-size:12px;color:#92400e;line-height:1.7}
.kg-guide .kg-tip code{background:#fef3c7;padding:1px 5px;border-radius:4px;font-size:11px;font-family:ui-monospace,Consolas,monospace}
.kg-guide-actions{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
.kg-guide-actions .kg-btn-primary{flex:1;min-width:150px;background:#6d28d9;color:#fff;border:none;border-radius:8px;padding:11px;font-size:14px;font-weight:600;cursor:pointer;text-align:center;text-decoration:none;display:inline-block}
.kg-guide-actions .kg-btn-primary:hover{background:#5b21b6}
.kg-guide-actions .kg-btn-ghost{background:#fff;color:#4b5563;border:1px solid #d1d5db;border-radius:8px;padding:11px 18px;font-size:14px;cursor:pointer}
.kg-guide-actions .kg-btn-ghost:hover{background:#f9fafb}
.kg-guide-foot{margin-top:14px;font-size:12px;color:#9ca3af;line-height:1.7}
.kg-guide-foot a{color:#6d28d9}
/* ===== 服务器关闭远程镜像后的左侧引导区 ===== */
#local-only{display:none;overflow-y:auto;background:linear-gradient(165deg,#fbfaff 0%,#fff 42%,#f7fbff 100%)}
body.remote-off #mirror-wrap{display:none}
body.remote-off #local-only{display:flex}
body.remote-off #im-bridge{display:none}
.local-hero{padding:38px 40px 32px;max-width:820px}
.local-hero-badge{display:inline-block;font-size:12px;font-weight:600;color:#047857;background:#ecfdf5;border:1px solid #a7f3d0;border-radius:20px;padding:3px 12px;margin-bottom:16px}
.local-hero h2{margin:0 0 10px;font-size:24px;color:#111827;letter-spacing:.5px}
.local-hero-sub{font-size:14px;color:#4b5563;line-height:1.9;margin:0 0 24px}
.local-hero-sub b{color:#6d28d9}
.local-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-bottom:26px}
.local-card{display:flex;gap:10px;background:#faf9ff;border:1px solid #ede9fe;border-radius:12px;padding:14px 16px}
.local-card-icon{font-size:18px;line-height:1.4}
.local-card b{display:block;font-size:13px;color:#111827;margin-bottom:4px}
.local-card p{margin:0;font-size:12px;color:#6b7280;line-height:1.7}
.local-steps{background:#f9fafb;border:1px solid var(--border);border-radius:12px;padding:16px 18px;margin-bottom:22px}
.local-step{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:#374151;line-height:1.8}
.local-step + .local-step{margin-top:10px}
.local-step span{flex:none;width:20px;height:20px;border-radius:50%;background:#6d28d9;color:#fff;font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:center;margin-top:2px}
.local-step code{background:#fff;border:1px solid #e5e7eb;padding:1px 6px;border-radius:4px;font-size:12px;color:#6d28d9;font-family:ui-monospace,Consolas,monospace}
.local-actions{display:flex;gap:10px;flex-wrap:wrap}
.local-btn-primary{background:#6d28d9;color:#fff;border:none;border-radius:8px;padding:11px 22px;font-size:14px;font-weight:600;cursor:pointer;text-decoration:none;transition:background .2s}
.local-btn-primary:hover{background:#5b21b6}
.local-btn-ghost{background:#fff;color:#4b5563;border:1px solid #d1d5db;border-radius:8px;padding:11px 18px;font-size:14px;cursor:pointer;transition:background .2s}
.local-btn-ghost:hover{background:#f9fafb}
.local-foot{margin:22px 0 0;font-size:12px;color:#9ca3af;line-height:1.8}
.local-status{padding:6px 16px;font-size:11px;color:#6b7280;background:#fafafa;border-top:1px solid var(--border);margin-top:auto}
@media(max-width:900px){.local-hero{padding:24px 20px}}

/* 远程镜像关闭时：批量阅卷按钮组隐藏，改为插件提示 */
.panel-hint{display:none;font-size:12px;color:#6b7280;line-height:1.8;background:#f9fafb;border:1px dashed #d1d5db;border-radius:8px;padding:10px 12px;margin:8px 0}
body.remote-off .panel-hint{display:block}
body.remote-off .grading-controls{display:none}
body.remote-off .mirror-only-row{display:none}

/* ===== 未登录遮罩：必须登录后才能输入网址/点击访问 ===== */
.login-gate{display:none;position:absolute;inset:0;z-index:30;align-items:center;justify-content:center;background:rgba(245,243,255,.9);backdrop-filter:blur(3px);padding:24px}
.login-gate.on{display:flex}
.login-gate-card{background:#fff;border-radius:16px;padding:30px 34px;max-width:380px;text-align:center;box-shadow:0 18px 46px rgba(76,29,149,.14);border:1px solid #ede9fe}
.login-gate-icon{font-size:26px;line-height:1;margin-bottom:12px}
.login-gate-card h3{margin:0 0 8px;font-size:18px;color:#111827}
.login-gate-card p{margin:0 0 18px;font-size:13px;color:#6b7280;line-height:1.8}
.login-gate-btn{display:inline-block;background:#6d28d9;color:#fff;border-radius:8px;padding:10px 26px;font-size:14px;font-weight:600;text-decoration:none;transition:background .2s}
.login-gate-btn:hover{background:#5b21b6}
.login-gate-hint{margin-top:12px;font-size:12px;color:#9ca3af}

/* 未登录时工具栏与阅卷按钮呈禁用态，避免"点了没反应"的错觉 */
.browser-toolbar input:disabled,.browser-toolbar button:disabled,
.grading-controls button:disabled{opacity:.45;cursor:not-allowed}
body.logged-out .browser-viewport{cursor:not-allowed}

/* ===== 公式输入辅助（参考答案 / 评分细则） ===== */
.kgm-toolbar{display:flex;flex-wrap:wrap;gap:4px;align-items:center;margin:0 0 5px;padding:5px 6px;background:#f8fafc;border:1px solid #e5e7eb;border-radius:6px}
.kgm-btn{flex:none;min-width:26px;padding:2px 6px;font-size:11px;line-height:1.5;color:#374151;background:#fff;border:1px solid #d1d5db;border-radius:4px;cursor:pointer;font-family:inherit}
.kgm-btn:hover{background:#eef2ff;border-color:#a5b4fc;color:#4338ca}
.kgm-btn:active{background:#e0e7ff}
.kgm-tip{font-size:11px;color:#9ca3af;margin-left:2px;line-height:1.5}
.kgm-preview{margin:-1px 0 8px;padding:6px 8px;background:#fbfdff;border:1px dashed #bfdbfe;border-radius:6px;font-size:12px;line-height:1.7;color:#1f2937;max-height:150px;overflow:auto}
.kgm-preview::before{content:"预览";display:block;font-size:10px;color:#94a3b8;margin-bottom:2px;letter-spacing:.5px}
.kgm-hint{font-size:11px;color:#b45309;margin-top:2px}
.kgm-chem{font-family:inherit}
/* KaTeX 输出的是 MathML，无需字体文件；这里只统一一下字号与行内间距 */
.katex math{font-size:1.05em}
.result-card .reasoning math{font-size:1.02em}

/* ===== 参考答案 / 评分细则：图片转文字 ===== */
.rule-tools{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:4px}
.rule-img-btn{padding:2px 8px;font-size:11px;line-height:1.6;color:#4338ca;background:#eef2ff;border:1px solid #c7d2fe;border-radius:4px;cursor:pointer;font-family:inherit}
.rule-img-btn:hover{background:#e0e7ff;border-color:#a5b4fc}
.rule-img-btn:disabled{opacity:.55;cursor:default}
.rule-tools-tip{font-size:10px;color:#9ca3af}
.rule-img-status{font-size:10px;color:#7c3aed}
.rule-img-status.busy{color:#7c3aed}
.rule-img-status.err{color:#ef4444}
/* 拖拽到位时的提示：让老师知道"松手就会识别"，而不是毫无反馈 */
.rule-drop{outline:2px dashed #a78bfa;outline-offset:2px;background:#f5f3ff}

/* ---- 自定义题型（与扩展同一套类名，便于一份逻辑三处复用） ---- */
.kg-qtype-add {
  margin-left: 6px;
  padding: 2px 8px;
  font-size: 11px;
  line-height: 1.7;
  color: #6d28d9;
  background: #f5f3ff;
  border: 1px dashed #c4b5fd;
  border-radius: 4px;
  cursor: pointer;
  vertical-align: middle;
}
.kg-qtype-add:hover { background: #ede9fe; }
.kg-qtype-form {
  display: none;
  align-items: center;
  flex-wrap: wrap;
  gap: 5px;
  margin: 2px 0 4px;
}
.kg-qtype-form input {
  width: 140px;
  padding: 3px 7px;
  font-size: 12px;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  color: #1e293b;
}
.kg-qtype-ok, .kg-qtype-cancel {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 4px;
  border: 1px solid #cbd5e1;
  background: #fff;
  color: #475569;
  cursor: pointer;
}
.kg-qtype-ok { color: #fff; background: #7c3aed; border-color: #7c3aed; }
.kg-qtype-chips { display: inline-flex; flex-wrap: wrap; gap: 5px; }
.kg-qtype-chip {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  padding: 1px 7px;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  color: #334155;
}
.kg-qtype-chip b { color: #94a3b8; cursor: pointer; font-weight: 400; }
.kg-qtype-chip b:hover { color: #dc2626; }
.kg-qtype-tip { font-size: 10px; color: #94a3b8; }
.kg-qtype-custom { margin: 0 0 4px; }
/* 网页表单的 label 占 63px，输入区与下拉左对齐 */
#rule-qtype-custom { margin-left: 63px; }
/* 题型下拉里有较长的自定义/旧版文案时，不能让 select 按最长选项撑开把「＋自定义」挤出面板 */
.form-row select { min-width: 0; }
.form-row .kg-qtype-add { flex: 0 0 auto; white-space: nowrap; }