/* /assets/style.css - V-UI/UX 2.0 响应式商务风格 */

:root {
    --primary-color: #0d6efd;
    --primary-hover-color: #0b5ed7;
    --text-color: #212529;
    --text-muted-color: #6c757d;
    --bg-color: #f8f9fa;
    --nav-bg-color: #ffffff;
    --nav-text-color: #343a40;
    --nav-hover-bg: #e9ecef;
    --border-color: #dee2e6;
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 16px;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* --- 左侧导航栏 --- */
.side-nav {
    width: 240px;
    background-color: var(--nav-bg-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: margin-left 0.3s ease;
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    z-index: 1000;
}

.side-nav .logo-area {
    padding: 18px 24px;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
    white-space: nowrap;
    border-bottom: 1px solid var(--border-color);
}

.side-nav .nav-links {
    list-style: none;
    padding: 0;
    margin: 16px 0;
    overflow-y: auto;
}

.side-nav .nav-links a {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    color: var(--nav-text-color);
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease;
    white-space: nowrap;
    border-left: 3px solid transparent;
}

.side-nav .nav-links a:hover {
    background-color: var(--nav-hover-bg);
}

.side-nav .nav-links a.active {
    color: var(--primary-color);
    font-weight: 500;
    background-color: #e7f1ff;
    border-left-color: var(--primary-color);
}

/* --- 主要内容区 --- */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    margin-left: 240px; /* 为左侧导航栏留出空间 */
    transition: margin-left 0.3s ease;
}

.header-bar {
    height: 60px;
    background-color: #fff;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 900;
}

.header-bar .menu-toggle {
    font-size: 1.5rem;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--text-muted-color);
}

.header-bar .user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-bar .user-details {
    text-align: right;
}

.header-bar .user-name {
    font-weight: 500;
}

.header-bar .user-role {
    font-size: 0.85rem;
    color: var(--text-muted-color);
}

.header-bar #logout-btn {
    color: var(--text-muted-color);
    cursor: pointer;
    text-decoration: none;
    background: none;
    border: none;
    font-size: 1rem;
    padding: 8px;
}

.header-bar #logout-btn:hover {
    color: var(--primary-color);
}

.page-content {
    flex-grow: 1;
    padding: 24px;
    overflow-y: auto;
}

/* --- 导航栏收拢样式 --- */
.sidenav-collapsed .side-nav {
    margin-left: -240px;
}

.sidenav-collapsed .main-content {
    margin-left: 0;
}


/* --- 移动端样式 --- */
@media (max-width: 992px) {
    .side-nav {
        left: -240px;
        transition: left 0.3s ease-in-out;
    }
    .main-content {
        margin-left: 0;
    }
    .app-container.sidenav-open .side-nav {
        left: 0;
        box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.15);
    }
    .overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0,0,0,0.4);
        z-index: 999;
        display: none;
    }
    .app-container.sidenav-open .overlay {
        display: block;
    }
}

/* --- 通用组件样式 (表单, 表格等) --- */
h1 { font-size: 1.75rem; color: #343a40; margin-top: 0; margin-bottom: 24px; }
h2 { font-size: 1.5rem; color: #495057; margin-top: 32px; margin-bottom: 16px; border-bottom: 1px solid var(--border-color); padding-bottom: 8px; }
.card { background-color: #ffffff; border: 1px solid var(--border-color); border-radius: 8px; padding: 24px; box-shadow: var(--shadow-sm); margin-bottom: 24px; }
form { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; }
label { display: block; margin-bottom: 8px; font-weight: 500; color: #495057; }
input, select, textarea { width: 100%; padding: 10px 12px; border: 1px solid #ced4da; border-radius: 4px; box-sizing: border-box; transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out; font-size: 1rem; }
input:focus, select:focus, textarea:focus { border-color: #86b7fe; outline: 0; box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25); }
.btn { display: inline-block; font-weight: 400; color: #fff; text-align: center; cursor: pointer; background-color: var(--primary-color); border: 1px solid var(--primary-color); padding: 10px 16px; font-size: 1rem; border-radius: 4px; transition: all 0.2s ease-in-out; }
.btn:hover { background-color: var(--primary-hover-color); border-color: var(--primary-hover-color); }
.form-actions { grid-column: 1 / -1; display: flex; justify-content: flex-end; gap: 12px; margin-top: 16px; }
table { width: 100%; border-collapse: collapse; background-color: #fff; }
th, td { border-bottom: 1px solid var(--border-color); padding: 12px 16px; text-align: left; vertical-align: middle; }
thead th { background-color: var(--bg-color); font-weight: 500; border-bottom-width: 2px; }
tbody tr:hover { background-color: rgba(13, 110, 253, 0.05); }
.action-btn { font-size: 0.8rem; padding: 4px 8px; margin-right: 5px; color: #fff; border: none; cursor: pointer; border-radius: 4px; }
.btn-success { background-color: #198754; }
.btn-danger { background-color: #dc3545; }
.btn-info { background-color: #0dcaf0; }