* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html,
body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    background-color: #1a1a1a;
}

#tiles {
    width: 100%;
    height: 100%;
    background-color: #000;
}

#auv {
    width: 1920px;
    height: 1080px;
}

button {
    background: linear-gradient(90deg, #3498db, #2980b9);
    color: white;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s ease;
}

button:hover {
    background: linear-gradient(90deg, #2980b9, #1f639e);
    transform: translateY(-1px);
}

select,
input,
button {
    padding: 8px 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 0.9rem;
    background-color: white;
}

/* 全屏按钮 */
.fullscreen-btn {
    position: fixed;
    bottom: 80px;
    right: 20px;
    z-index: 1001;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(90deg, #3498db, #2980b9);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.fullscreen-btn:hover {
    background: linear-gradient(90deg, #2980b9, #1f639e);
    transform: scale(1.1);
}