/* 全局样式 */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --danger-color: #e74c3c;
    --success-color: #2ecc71;
    --warning-color: #f1c40f;
    --text-color: #2c3e50;
    --text-light: #7f8c8d;
    --background-color: #f8f9fa;
    --border-color: #ecf0f1;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 0.75rem 1rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.navbar-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
}

.navbar-header {
    display: flex;
    align-items: center;
    flex: 0 0 auto;
}

.navbar-brand {
    color: var(--primary-color);
    font-size: 1.1rem;
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    transition: all 0.2s;
}

.navbar-brand:hover {
    background-color: rgba(0,0,0,0.03);
}

.navbar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 4px;
}

.navbar-toggle:hover {
    background-color: rgba(0,0,0,0.03);
}

.navbar-nav {
    display: flex;
    align-items: center;
    margin-left: 1rem;
    flex: 1;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    height: 36px;
    opacity: 0.8;
}

.nav-link:hover {
    background-color: rgba(0,0,0,0.03);
    opacity: 1;
}

.nav-link i {
    font-size: 1.1em;
    color: var(--text-light);
}

.nav-link:hover i {
    color: var(--primary-color);
}

.nav-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    position: relative;
    height: 100%;
    padding: 0 0.5rem;
}

.nav-group::after {
    content: '';
    display: block;
    width: 1px;
    height: 20px;
    background: rgba(0,0,0,0.08);
    margin: 0 0.5rem;
}

.nav-user {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    height: 100%;
}

.role-badge {
    background-color: rgba(0,0,0,0.05);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-color);
    white-space: nowrap;
}

/* 主容器 */
.main-container {
    max-width: 1200px;
    margin: 80px auto 20px;
    padding: 0 1rem;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-2px);
}

.card-header {
    margin: -1.5rem -1.5rem 1rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(0,0,0,0.02);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-color);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-header .header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-header .header-actions .btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    white-space: nowrap;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: all 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(52,152,219,0.1);
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn i {
    font-size: 1.25em;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.btn:active {
    transform: translateY(0);
}

/* 状态标签 */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
}

.badge i {
    font-size: 1.1em;
}

.badge-pending { background-color: var(--warning-color); }
.badge-approved { background-color: var(--accent-color); }
.badge-in_use { background-color: var(--success-color); }
.badge-completed { background-color: var(--text-light); }

/* 提示消息 */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: opacity 0.3s;
}

.alert i {
    font-size: 1.25em;
}

.alert-success {
    background-color: rgba(46,204,113,0.1);
    color: var(--success-color);
}

.alert-error {
    background-color: rgba(231,76,60,0.1);
    color: var(--danger-color);
}

.alert-warning {
    background-color: rgba(241,196,15,0.1);
    color: var(--warning-color);
}

.alert-info {
    background-color: rgba(52,152,219,0.1);
    color: var(--accent-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        padding: 0.5rem;
        background: rgba(255, 255, 255, 0.98);
    }

    .navbar-content {
        flex-direction: column;
        align-items: stretch;
    }

    .navbar-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
    }

    .navbar-toggle {
        display: block;
        margin-left: auto;
    }
    
    .navbar-nav {
        display: none;
        flex-direction: column;
        width: 100%;
        height: auto;
        padding: 0.5rem 0;
        margin: 0.5rem 0 0;
        border-top: 1px solid rgba(0,0,0,0.05);
    }
    
    .navbar-nav.show {
        display: flex;
    }
    
    .nav-link {
        width: 100%;
        height: 40px;
        padding: 0.5rem;
    }
    
    .nav-group {
        flex-direction: column;
        width: 100%;
        height: auto;
        gap: 0;
        padding: 0;
    }

    .nav-group::after {
        display: none;
    }
    
    .nav-user {
        flex-direction: column;
        width: 100%;
        margin: 0;
        padding-top: 0.5rem;
        border-top: 1px solid rgba(0,0,0,0.05);
    }
    
    .role-badge {
        margin-left: 1.75rem;
    }
    
    .main-container {
        margin-top: 70px;
        padding: 0 0.75rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    .card-header {
        margin: -1rem -1rem 1rem;
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .card-header .header-actions {
        width: auto;
        margin-left: auto;
    }
    
    .card-header .header-actions .btn {
        width: auto;
        margin-bottom: 0;
        padding: 0.4rem 0.75rem;
        font-size: 0.85rem;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .form-control {
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    .request-summary {
        padding: 0.6rem 0.75rem;
    }
    
    .request-brief {
        gap: 0.5rem;
    }
    
    .request-title {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .request-brief {
        gap: 0.4rem;
    }
    
    .request-title {
        max-width: calc(100vw - 80px);
    }
    
    .badge {
        font-size: 0.75rem;
    }
}

/* 申请列表样式优化 */
.request-item {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.request-summary {
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.request-brief {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 0;
}

.request-title {
    font-size: 0.95rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.badge {
    padding: 0.15rem 0.5rem;
    font-size: 0.8rem;
    border-radius: 4px;
}