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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #0d1117;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: #fff;
}

.container {
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 10px;
    padding: 25px;
    max-width: 450px;
    width: 100%;
    text-align: center;
}

h1 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #fff;
}

.task {
    background: #21262d;
    border: 1px solid #30363d;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 15px;
    font-size: 15px;
    color: #ffffff;
}

#captchaCanvas {
    border: 1px solid #30363d;
    border-radius: 6px;
    background: #0d1117;
    cursor: pointer;
    max-width: 100%;
    height: auto;
    margin: 0 auto 10px;
    display: block;
}

.count {
    color: #8b949e;
    font-size: 13px;
    margin-bottom: 10px;
}

.count span {
    color: #58a6ff;
    font-weight: bold;
}

.error {
    display: none;
    color: #f85149;
    font-size: 13px;
    margin-bottom: 10px;
    padding: 8px;
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid rgba(248, 81, 73, 0.3);
    border-radius: 6px;
}

.btn {
    width: 100%;
    padding: 12px;
    background: #58a6ff;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    cursor: pointer;
    font-weight: 500;
}

.btn:hover {
    background: #4a8edf;
}

.footer {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #30363d;
    color: #8b949e;
    font-size: 12px;
}

@media (max-width: 500px) {
    .container {
        padding: 20px;
    }
    h1 {
        font-size: 18px;
    }
}