* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100%;
    padding: 15px;
    -webkit-overflow-scrolling: touch;
}

.container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    padding: 20px;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

h1 {
    color: #333;
    font-size: 16px;
    font-weight: 600;
    position: relative;
}

.btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 10px;
    -webkit-appearance: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.btn-secondary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-secondary:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.75);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    z-index: 10002;
    display: none;
}

.footer-info {
    text-align: center;
    padding: 15px;
    margin-top: 10px;
}

.copyright {
    margin-bottom: 8px;
    font-size: 12px;
    color: #333;
}

.copyright a {
    color: #333;
    text-decoration: none;
    font-weight: 500;
}

.copyright a:hover {
    color: #000;
    text-decoration: underline;
}

.spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid #e0e0e0;
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
    vertical-align: middle;
}

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

@media (max-width: 375px) {
    body {
        padding: 10px;
    }
    .container {
        padding: 15px;
    }
    h1 {
        font-size: 18px;
    }
}