:root {
    --primary-color: #5e72e4;
    --secondary-color: #f7fafc;
    --text-color: #525f7f;
    --light-gray: #adb5bd;
    --dark-gray: #32325d;
    --success-color: #2dce89;
    --warning-color: #fb6340;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: #f8f9fa;
}

.login-header {
    background: linear-gradient(87deg, var(--primary-color) 0, #825ee4 100%) !important;
    box-shadow: 0 4px 20px 0 rgba(0, 0, 0, 0.1);
}

.login-card {
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: none;
    overflow: hidden;
    transition: all 0.3s ease;
}

.login-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.qr-container {
    padding: 30px;
    text-align: center;
}

#qrimg {
    margin: 0 auto;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    display: inline-block;
    position: relative;
}

#qrimg canvas {
    width: 200px !important;
    height: 200px !important;
    transition: all 0.3s;
}

#qrimg canvas:hover {
    transform: scale(1.03);
}

.status-message {
    font-size: 14px;
    color: var(--text-color);
    margin: 20px 0;
    font-weight: 500;
    min-height: 24px;
}

.status-message.success {
    color: var(--success-color);
}

.status-message.warning {
    color: var(--warning-color);
}

.refresh-hint {
    font-size: 14px;
    color: var(--light-gray);
    margin-top: 15px;
}

.footer-links {
    margin-top: 20px;
    font-size: 14px;
}

.footer-links a {
    color: var(--light-gray);
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.mobile-login-btn {
    display: none;
    margin-top: 20px;
}

@media (max-width: 576px) {
    .login-card {
        margin: 0 15px;
    }

    .qr-container {
        padding: 20px;
    }

    #qrimg canvas {
        width: 180px !important;
        height: 180px !important;
    }
}

.qr-loading {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 200px;
    height: 200px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    margin: 0 auto;
}

.qr-loading .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(94, 114, 228, 0.2);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}