body {
    margin: 40px auto;
    max-width: 800px;
    font-family: system-ui, -apple-system, sans-serif;
    color: #333;
    background: #fdfdfd;
    line-height: 1.6;
}

.hero {
    padding: 20px;
    border: 1px solid #ccc;
    background: #fff;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.05);
}

h1 {
    font-size: 2.5rem;
    margin-top: 0;
    color: #111;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}

p {
    font-size: 1.1rem;
    color: #444;
}

.demo-box {
    margin-top: 30px;
    padding: 20px;
    background: #f9f9f9;
    border: 1px solid #ddd;
}

.constants-bar {
    margin-bottom: 15px;
    text-align: right;
}

.btn-small {
    padding: 4px 10px;
    font-size: 0.85rem;
    background: #e0e0e0;
    border: 1px solid #999;
    margin-left: 5px;
    color: #333;
    cursor: pointer;
}

.btn-small:hover {
    background: #d0d0d0;
}

input {
    padding: 8px;
    margin: 10px 5px;
    width: 320px;
    border: 1px solid #999;
    background: #fff;
    font-family: monospace;
    font-size: 1rem;
    color: #000;
}

.op-select {
    padding: 8px;
    font-size: 1rem;
    font-weight: normal;
    border: 1px solid #999;
    background: #fff;
    vertical-align: middle;
}

button#calcBtn {
    margin-top: 20px;
    padding: 10px 20px;
    border: 1px solid #666;
    background: #eee;
    color: #333;
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
    display: block;
    width: 100%;
}

button#calcBtn:hover {
    background: #ddd;
    border-color: #333;
}

.result-container {
    margin-top: 30px;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
}

.result-title {
    font-size: 0.9rem;
    font-weight: normal;
    color: #0056b3;
    margin-bottom: 0;
}

.result-title.js-title {
    color: #856404;
    margin-top: 20px;
}

.result {
    padding: 15px;
    background: #fff;
    border: 1px solid #0056b3;
    font-family: monospace;
    font-size: 1rem;
    color: #000;
    word-break: break-all;
}

.result.js-result {
    border: 1px dashed #d39e00;
    color: #555;
    background: #fff3cd;
}

.footer-links {
    margin-top: 30px;
    text-align: center;
    font-size: 0.9rem;
}

.footer-links a {
    color: #0056b3;
    text-decoration: none;
    margin: 0 10px;
}

.footer-links a:hover {
    text-decoration: underline;
}

.warning-box {
    margin: 15px 5px;
    padding: 12px 16px;
    background: #fff5f5;
    border: 1px solid #ffc9c9;
    border-left: 4px solid #ff6b6b;
    border-radius: 6px;
    color: #c92a2a;
    font-size: 0.95rem;
    font-family: inherit;
    text-align: left;
}

.warning-box a.fix-link {
    color: #1c7ed6;
    text-decoration: underline;
    cursor: pointer;
    font-weight: bold;
    margin-left: 8px;
}

.warning-box a.fix-link:hover {
    color: #101113;
}

.diff-digit {
    color: #d9534f;
    font-weight: bold;
    background-color: #f9f2f4;
    padding: 0 2px;
    border-radius: 3px;
    border-bottom: 1px dashed #d9534f;
}