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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f0f2f5;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-box {
    background: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.auth-title {
    text-align: center;
    margin-bottom: 30px;
    font-size: 24px;
    color: #333;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #409eff;
}

.sms-input-group {
    display: flex;
    gap: 10px;
}

.sms-input-group .form-control {
    flex: 1;
}

.sms-input-group .btn {
    white-space: nowrap;
    flex-shrink: 0;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-primary {
    background-color: #409eff;
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background-color: #66b1ff;
}

.btn-success {
    background-color: #67c23a;
    color: white;
}

.btn-success:hover {
    background-color: #85ce61;
}

.btn-danger {
    background-color: #f56c6c;
    color: white;
}

.btn-danger:hover {
    background-color: #f78989;
}

.btn-secondary {
    background-color: #909399;
    color: white;
}

.btn-secondary:hover {
    background-color: #a6a9ad;
}

.btn-secondary:disabled {
    background-color: #c0c4cc;
    cursor: not-allowed;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.auth-switch {
    text-align: center;
    margin-top: 20px;
}

.auth-switch a {
    color: #409eff;
    text-decoration: none;
}

.layout-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    background: #304156;
    color: #bfcbd9;
    flex-shrink: 0;
}

.sidebar-header {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid #1f2d3d;
    font-size: 20px;
    color: white;
}

.sidebar-menu {
    padding: 20px 0;
}

.menu-item {
    display: block;
    padding: 12px 20px;
    color: #bfcbd9;
    text-decoration: none;
    transition: all 0.3s;
}

.menu-item:hover, .menu-item.active {
    background: #263445;
    color: white;
}

.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.header {
    background: white;
    padding: 15px 20px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.content {
    flex: 1;
    padding: 20px;
}

.card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

.card-title {
    font-size: 18px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    background: #f5f7fa;
    font-weight: 600;
}

.table tr:hover {
    background: #f9fafc;
}

.alert {
    padding: 12px 16px;
    border-radius: 4px;
    margin-bottom: 20px;
}

.alert-success {
    background: #f0f9eb;
    color: #67c23a;
    border: 1px solid #e1f3d8;
}

.alert-error {
    background: #fef0f0;
    color: #f56c6c;
    border: 1px solid #fde2e2;
}

.tabs {
    display: flex;
    border-bottom: 1px solid #eee;
    margin-bottom: 20px;
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
}

.tab.active {
    color: #409eff;
    border-bottom-color: #409eff;
}

.file-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.file-item {
    padding: 15px;
    border: 1px solid #eee;
    border-radius: 4px;
    min-width: 150px;
    cursor: pointer;
}

.file-item:hover {
    border-color: #409eff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    color: #409eff;
    margin-bottom: 10px;
}

.stat-label {
    color: #909399;
}