:root {
    --bg-base: #0a0a0a;
    --bg-panel: #111111;
    --border-color: #27272a;
    --text-main: #f4f4f5;
    --text-sub: #a1a1aa;
    --accent: #9FC548;
    --accent-hover: #85AA2F;
}

body, html { 
    margin: 0; padding: 0; width: 100%; height: 100%; 
    background-color: var(--bg-base); 
    font-family: system-ui, -apple-system, sans-serif; 
    color: var(--text-main); 
    overflow: hidden; 
    user-select: none; 
    -webkit-user-select: none; 
}
textarea, input { user-select: auto; -webkit-user-select: auto; }

/* 无限画布 (去掉了顶部栏，所以高度是 100vh) */
#workspace-view { position: relative; width: 100vw; height: 100vh; overflow: hidden; }
#canvas-container { 
    width: 100%; height: 100%; position: relative; 
    background-image: radial-gradient(#2a2a2a 1px, transparent 1px); 
    background-size: 20px 20px; cursor: grab;
}
#canvas-container:active { cursor: grabbing; }
#canvas-pan-layer { position: absolute; top: 0; left: 0; width: 100%; height: 100%; transform-origin: 0 0; }
#svg-canvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 1; overflow: visible; }
#nodes-layer { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 10; }

/* 连线 */
.connection-line { fill: none; stroke: var(--accent); stroke-width: 2.5px; stroke-linecap: round; }
.temp-line { stroke: #666; stroke-dasharray: 4,4; }

/* 节点通用质感 */
.node {
    position: absolute; background: rgba(24, 24, 26, 0.75); border: 1px solid rgba(255, 255, 255, 0.1); 
    border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.8); backdrop-filter: blur(20px);
    display: flex; flex-direction: column; width: 300px; pointer-events: auto;
}
.node-header {
    padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,0.05); cursor: grab; font-size: 14px; font-weight: 600;
    display: flex; justify-content: space-between; align-items: center; border-radius: 12px 12px 0 0; 
    background: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, transparent 100%);
}
.node-header:active { cursor: grabbing; }
.node-content { padding: 16px; display: flex; flex-direction: column; gap: 12px; }

/* 端口 */
.port { 
    width: 14px; 
    height: 14px; 
    border-radius: 50%; 
    
    /* ✅ 默认：蓝色空心 */
    background: transparent; 
    border: 2px solid var(--accent); 
    
    position: absolute; 
    cursor: crosshair; 
    z-index: 15; 
    transition: all 0.2s ease;

    /* ✅ 关键：抗缩放（解决变扁） */
    transform: translateY(-50%) scale(calc(1 / var(--canvas-scale, 1)));
    transform-origin: center;
}
.port:hover { 
    box-shadow: 0 0 8px var(--accent);
    border-color: #fff;
}
.port.out { 
    right: -8px; 
    top: 50%; 
}

.port.in { 
    left: -8px; 
    top: 50%; 
}
.port.connected { background: var(--accent); border-color: var(--accent); }
.port-group { position: absolute; left: -8px; top: 0; bottom: 0; display: flex; flex-direction: column; justify-content: center; gap: 10px; width: 14px;}
.port-group .port { position: static; transform: none; }

/* 动态参考源区域 */
.ref-box { border: 1px solid #333; border-radius: 8px; padding: 10px; background: rgba(0,0,0,0.2); min-height: 60px; display: flex; flex-wrap: wrap; gap: 8px; position: relative; }
.ref-thumbnail { width: 45px; height: 60px; border-radius: 4px; object-fit: cover; border: 1px solid #555; animation: popIn 0.3s ease; }
@keyframes popIn { from { transform: scale(0.5); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.ref-placeholder { font-size: 12px; color: #666; width: 100%; text-align: center; line-height: 40px; }

/* 表单细节 (🌟这里修改了 resize: vertical，允许垂直拉长) */
textarea { width: 100%; min-height: 60px; height: 90px; background: rgba(0,0,0,0.3); border: 1px solid #333; border-radius: 8px; color: #ddd; padding: 10px; font-size: 13px; resize: vertical; outline: none; box-sizing: border-box; }
textarea:focus { border-color: var(--accent); }
.row-params { display: flex; gap: 8px; }
select { flex: 1; background: rgba(0,0,0,0.5); border: 1px solid #444; color: #ddd; padding: 8px; border-radius: 6px; outline: none; font-size: 12px; cursor: pointer; }
.run-btn { background: #2b8a3e; color: white; border: none; padding: 10px; border-radius: 8px; font-size: 14px; font-weight: 600; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 6px; margin-top: 4px; transition: 0.2s;}
.run-btn:hover { background: #37b24d; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(43, 138, 62, 0.4);}

/* 快捷悬浮菜单 */
.context-menu {
    position: absolute; background: rgba(24, 24, 26, 0.85); border: 1px solid #333;
    border-radius: 12px; padding: 8px; box-shadow: 0 10px 40px rgba(0,0,0,0.6);
    backdrop-filter: blur(20px); z-index: 9999; min-width: 150px;
    animation: menuFadeIn 0.15s ease-out;
}
@keyframes menuFadeIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
.menu-item {
    padding: 10px 14px; color: #ddd; font-size: 13px; font-weight: 500; cursor: pointer;
    border-radius: 8px; display: flex; align-items: center; gap: 10px; transition: 0.2s;
}
.menu-item i { font-size: 16px; color: var(--text-sub); transition: 0.2s;}
.menu-item:hover { background: rgba(255,255,255,0.1); color: #fff; }
.menu-item:hover i { color: var(--accent); }
.menu-sep { height: 1px; background: #333; margin: 4px 0; }

/* 提示弹窗 */
#toast-container { position: fixed; top: 20px; left: 50%; transform: translateX(-50%); z-index: 9999; display: flex; flex-direction: column; gap: 10px; pointer-events: none; }
.toast { background: rgba(24,24,26,0.9); color: #fff; padding: 10px 20px; border-radius: 30px; font-size: 14px; border: 1px solid #333; backdrop-filter: blur(10px); }

/* 注册表单 */
.auth-toggle-link { color: var(--accent); cursor: pointer; text-align: center; font-size: 13px; margin-top: 4px; }
.auth-toggle-link:hover { text-decoration: underline; }
.register-panel { display: flex; flex-direction: column; gap: 14px; }
.register-section-title { font-size: 13px; color: var(--accent); font-weight: 600; margin-top: 6px; padding-bottom: 6px; border-bottom: 1px solid var(--border-color); }
.key-pair-row { display: flex; gap: 8px; align-items: center; }
.key-pair-row input { flex: 1; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border-color); background: var(--bg-base); color: var(--text-main); outline: none; font-size: 13px; }
.key-pair-row .btn-remove-key { width: 32px; height: 32px; border-radius: 8px; border: 1px solid #ef4444; background: transparent; color: #ef4444; cursor: pointer; font-size: 16px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.key-pair-row .btn-remove-key:hover { background: rgba(239,68,68,0.15); }
.btn-add-key { padding: 6px 14px; border-radius: 8px; border: 1px dashed var(--border-color); background: transparent; color: var(--text-sub); cursor: pointer; font-size: 12px; transition: 0.2s; }
.btn-add-key:hover { border-color: var(--accent); color: var(--accent); }

/* 密钥管理弹窗 */
.key-modal-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgba(0,0,0,0.6); z-index: 9500; display: flex; justify-content: center; align-items: center; }
.key-modal { width: 440px; max-height: 80vh; overflow-y: auto; padding: 30px; background: var(--bg-panel); border: 1px solid var(--border-color); border-radius: 16px; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.key-modal h3 { margin: 0 0 20px 0; color: var(--text-main); font-size: 18px; }
.key-modal label { font-size: 13px; color: var(--text-sub); margin-bottom: 4px; display: block; }
.key-modal input { width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border-color); background: var(--bg-base); color: var(--text-main); outline: none; font-size: 13px; box-sizing: border-box; margin-bottom: 12px; }
.key-modal-actions { display: flex; gap: 10px; margin-top: 16px; }
.key-modal-actions button { flex: 1; padding: 10px; border-radius: 8px; font-size: 14px; font-weight: 600; cursor: pointer; border: none; }
.key-modal-actions .btn-save { background: #2b8a3e; color: #fff; }
.key-modal-actions .btn-save:hover { background: #37b24d; }
.key-modal-actions .btn-cancel { background: var(--bg-card); color: var(--text-sub); border: 1px solid var(--border-color); }

/* 管理员 Tab 导航 */
.admin-tabs { display: flex; gap: 0; margin-bottom: 24px; border-bottom: 2px solid var(--border-color); }
.admin-tab { padding: 10px 24px; font-size: 14px; font-weight: 600; cursor: pointer; color: var(--text-sub); border-bottom: 2px solid transparent; margin-bottom: -2px; transition: 0.2s; }
.admin-tab:hover { color: var(--text-main); }
.admin-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* 使用量面板 */
.usage-summary-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 24px; }
.usage-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; padding: 20px; text-align: center; }
.usage-card .card-value { font-size: 28px; font-weight: 800; color: var(--accent); margin-bottom: 4px; }
.usage-card .card-label { font-size: 12px; color: var(--text-sub); }
.usage-table { width: 100%; border-collapse: collapse; }
.usage-table th { text-align: left; padding: 10px 16px; font-size: 12px; color: var(--text-sub); font-weight: 600; border-bottom: 1px solid var(--border-color); }
.usage-table td { padding: 12px 16px; font-size: 13px; color: var(--text-main); border-bottom: 1px solid rgba(255,255,255,0.05); }
.usage-table tr:hover td { background: rgba(255,255,255,0.03); }
.usage-filter { display: flex; gap: 8px; margin-bottom: 16px; }
.usage-filter button { padding: 6px 16px; border-radius: 20px; border: 1px solid var(--border-color); background: transparent; color: var(--text-sub); cursor: pointer; font-size: 12px; transition: 0.2s; }
.usage-filter button.active { background: var(--accent); color: #fff; border-color: var(--accent); }