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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    max-width: 440px;
    padding: 20px;
}

.login-box {
    background: #fff;
    border-radius: 12px;
    padding: 48px 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.title {
    font-size: 22px;
    color: #333;
    text-align: center;
    margin-bottom: 8px;
    font-weight: 600;
}

.subtitle {
    font-size: 18px;
    color: #666;
    text-align: center;
    margin-bottom: 36px;
    font-weight: 500;
}

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

.form-group input {
    width: 100%;
    height: 44px;
    padding: 0 16px;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: #667eea;
}

.login-btn {
    width: 100%;
    height: 44px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
    margin-top: 12px;
}

.login-btn:hover {
    opacity: 0.9;
}

.form-links {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    font-size: 13px;
}

.form-links a {
    color: #667eea;
    text-decoration: none;
}

.form-links a:hover {
    text-decoration: underline;
}

.error-msg {
    color: #e74c3c;
    font-size: 13px;
    text-align: center;
    margin-top: 12px;
    min-height: 20px;
}