/*:root { --xxx }= 整个网页的“设计参数表 / 主题配置中心”*/
:root {
    --primary: #3498db;
    --bg: #727885;
    --text: #bfc7cb;
    --hilight: #f0e69b;
}
body {
    margin: 0;
    padding: 0;
    background: var(--text);
    color: var(--bg);
    font-family: system-ui;
    overflow: hidden;
}

/* 顶部仿真工具箱 */
#toolbar{
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 40px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 6px;
    background: rgba(121, 148, 132, 0.85);
    color: #fff;
    z-index: 1000;
    box-shadow: 0 2px 6px rgba(0,0,0,0.25);
}

#toolbar button{
    background: transparent;
    border: 4px solid rgba(49, 44, 191, 0.25);
    color: #fff;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
}

#toolbar button:hover{ background: rgba(54, 48, 48, 0.3); }

/* ===== 故障弹窗 ===== */
#faultModal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: #fff;
    width: 400px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.modal-header {
    background: #34495e;
    color: white;
    padding: 15px;
    font-size: 18px;
    font-weight: bold;
}

.modal-body {
    padding: 20px;
    max-height: 400px;
    overflow-y: auto;
}

.modal-footer {
    background: #f1f2f6;
    padding: 15px;
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

.btn-cancel {
    padding: 8px 20px;
    background: #95a5a6;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.btn-apply {
    padding: 8px 25px;
    background: #27ae60;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

/* ===== 故障复选框 ===== */
.f-checkbox {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    border-bottom: 1px solid #eee;
    cursor: pointer;
    transition: background 0.2s;
}

.f-checkbox:hover {
    background: #f8f9fa;
}

.f-checkbox input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.f-checkbox:last-child {
    border-bottom: none;
}

/* 让画布位于工具箱下方并占满剩余高度 */
#container {
    display: flex;
    width: 100vw;
    height: 100vh;
    background: #e4e6e7; 
    background-image: radial-gradient(rgba(0, 0, 0, .15) 1px, transparent 1px); /*点状背景*/
    background-size: 50px 50px; /*点状背景间距*/
}