:root {
    font-family: system-ui, sans-serif;
    background-color: #0f172a;
    color: #f1f5f9;
}

::selection {
    background: #3b82f6;
    color: #fff;
}

body {
    max-width: 1000px;
    margin: 32px auto;
    padding: 20px;
}

h1 {
    font-size: 28px;
    margin-bottom: 8px;
    color: #f1f5f9;
}

p.lead {
    color: #94a3b8; /* slate-400 */
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 18px 0;
    background-color: #1e293b; /* slate-800 */
    border-radius: 6px;
    overflow: hidden;
}

th,
td {
    border: 1px solid #334155; /* slate-700 */
    padding: 8px;
    text-align: left;
    font-family: monospace;
}

th {
    background: #1e293b; /* slate-800 */
    color: #e2e8f0; /* slate-200 */
}

td {
    color: #f1f5f9;
}

pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 12px;
    border-radius: 6px;
    overflow: auto;
}

.kbd {
    background: #334155;
    color: #f1f5f9;
    border-radius: 4px;
    padding: 2px 6px;
    font-family: monospace;
}

.row {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.col {
    flex: 1;
    min-width: 300px;
}

.note {
    background: #1e293b;
    border-left: 4px solid #3b82f6;
    padding: 8px;
    margin: 12px 0;
    color: #cbd5e1; /* slate-300 */
}

button.copy {
    margin-left: 8px;
    background: #3b82f6;
    color: #fff;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
}

button.copy:hover {
    background: #2563eb;
}

footer {
    margin-top: 24px;
    color: #94a3b8;
    font-size: 13px;
}

#simulator {
    margin-top: 24px;
    padding: 16px;
    border: 1px solid #334155;
    border-radius: 8px;
    background: #1e293b;
}

#sim-output {
    background: #0f172a;
    color: #22c55e;
    padding: 8px;
    border-radius: 6px;
    margin-top: 8px;
    white-space: pre;
}

label {
    font-weight: bold;
    display: block;
    margin-bottom: 4px;
    color: #f1f5f9;
}

input,
select {
    padding: 6px;
    width: 100%;
    margin-bottom: 8px;
    font-family: monospace;
    background: #0f172a;
    color: #f1f5f9;
    border: 1px solid #334155;
    border-radius: 4px;
}