:root {
    --primary: #e63946;
    --primary-hover: #9f2731;
    --bg: #f8f9fa;
    --card-bg: #fff;
}

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: #222;
}

.top-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgb(223, 223, 223);
    color: black;
    padding: 20px 20px;
    margin: 16px auto;
    width: 90%;
    max-width: 600px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    position: relative;
    font-size: 1.3rem;
    font-weight: bold;
}

.top-bar a {
    position: absolute;
    padding: 5px 10px;
    left: 16px;
    color: white;
    background-color: #e63946;
    text-decoration: none;
    font-size: 1.2rem;
    border: 2px solid #e63946;
    border-radius: 8px;
}

.output {
    text-align: center;
    margin: 2rem 1rem;
    font-size: 1.4rem;
    font-weight: bold;
}

.controls {
    max-width: 500px;
    margin: 0 auto 2rem auto;
    background: var(--card-bg);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.controls h3 {
    margin-bottom: 0.5rem;
}

.options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 1rem;
}

label {
    background: #f0f0f0;
    padding: 6px 10px;
    border-radius: 4px;
    cursor: pointer;
}

input[type="checkbox"] {
    margin-right: 6px;
}

.btn {
    display: block;
    width: 100%;
    padding: 12px;
    margin-top: 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s ease-in-out;
}

.btn:hover {
    background: var(--primary-hover);
}

.info-box {
    margin-top: 1rem;
    padding: 1rem 1.5rem;
    background-color: #fff9ef;
    border: 2px solid #e63946;
    border-radius: 8px;
    font-size: 0.95rem;
    color: #333;
}

.info-box h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    color: #e63946;
    font-size: 1.1rem;
}

.info-box ul {
    margin: 0;
    padding-left: 1.2rem;
}

.info-box a {
    color: #ffa200;
    text-decoration: none;
}

.info-box a:hover {
    font-weight: bold;
}

@media (max-width: 600px) {
    .output {
        font-size: 1.1rem;
    }

    .controls {
        padding: 0.8rem;
    }

    .btn {
        font-size: 0.9rem;
        padding: 10px;
    }
}