body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #000;
    font-family: "Geo", sans-serif;
    font-weight: 400;
    font-style: normal;
}

#startScreen {
    background-color: rgba(0, 0, 0, 0.8);
    padding: 40px;
    border-radius: 10px;
    text-align: center;
    color: white;
}

h1 {
    color: #fff;
    margin-bottom: 30px;
    font-size: 42px;
}

#usernameInput {
    padding: 10px;
    font-size: 20px;
    width: 200px;
    margin-bottom: 20px;
    border: none;
    border-radius: 5px;
    background-color: #2c3e50;
    color: white;
}

#startButton {
    padding: 10px 20px;
    margin-bottom: 30px;
    font-size: 20px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    font-family: "Geo", sans-serif;
}

#startButton:hover {
    background-color: #2980b9;
}

#gameScreen {
    display: none;
}

#gameCanvas {
    position: absolute;
    top: 0;
    left: 0;
}

#instructions {
    margin-top: 20px;
    padding: 15px;
    background-color: rgba(44, 62, 80, 0.5);
    border-radius: 5px;
    font-size: 14px;
    line-height: 1.6;
}

.key {
    display: inline-block;
    padding: 2px 6px;
    background-color: #34495e;
    border-radius: 3px;
    margin: 0 2px;
}

.part {
    font-size: 16px;
    margin: 0 0 12px;
}

#errorMessage {
    color: #e74c3c;
    margin-top: 15px;
    padding: 10px;
    background-color: rgba(231, 76, 60, 0.1);
    border-radius: 5px;
    display: none;
}

#retryButton {
    margin-top: 10px;
    padding: 8px 16px;
    font-size: 14px;
    background-color: #e74c3c;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
    display: none;
    font-family: "Geo", sans-serif;
}

#retryButton:hover {
    background-color: #c0392b;
}

#planetCreationButton:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.select-rocket {
    display: flex;
    margin: 0 0 20px;
}

.select-rocket__right,
.select-rocket__left {
    font-size: 40px;
    cursor: pointer;
    height: 38px;
    align-self: center;
    line-height: 33px;
}

.select-rocket__left:hover,
.select-rocket__right:hover {
    opacity: 0.6;
}

.select-rocket__left {
    font-size: 40px;
    margin-left: auto;
}

.select-rocket__right {
    font-size: 40px;
    margin-right: auto;
}

.select-rocket__rocket {
    width: 120px;
    height: 100px;
}