body {
    font-family: "Microsoft YaHei", Arial, sans-serif;
    background-color: #1E1E1E;
    color: #FFF;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    overflow: hidden;
    scroll-behavior: smooth;
    background-image: radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 20px 20px;
}

.container {
    width: 310px;
    background-color: #353B3F;
    border-radius: 0px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: box-shadow 0.3s ease;
}

.container:hover {
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.6);
}

.header {
    background-color: #2A2E31;
    padding: 8px 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid #444;
    background-image: linear-gradient(to bottom, #2F3336, #2A2E31);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
}

.header h1 {
    margin: 0;
    font-size: 28px;
    font-weight: normal;
    color: #D3DBDB;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    letter-spacing: 0.5px;
}

.main-content {
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.2s ease;
}

footer {
    padding: 8px 0;
    font-size: 12px;
    color: #888;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

button {
    transition: all 0.2s ease;
}

input {
    transition: all 0.2s ease;
}

button:focus,
input:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.3);
}