:root {
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text: #f8fafc;
    --muted: #94a3b8;
    --accent: #38bdf8;
    --border: #334155;
    --danger: #f87171;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    display: flex;
    justify-content: center;
    padding: 2rem 1rem;
    margin: 0;
}

.container {
    width: 100%;
    max-width: 650px;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

h1 {
    margin-top: 0;
    font-size: 1.5rem;
    color: var(--accent);
    text-align: center;
}

.form-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.field {
    flex: 1;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--muted);
}

input {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    box-sizing: border-box;
    font-size: 1rem;
}

input:focus {
    outline: none;
    border-color: var(--accent);
}

button {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--accent);
    color: #0f172a;
    font-weight: bold;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    transition: opacity 0.2s;
}

button:hover {
    opacity: 0.9;
}

.error {
    background-color: rgba(248, 113, 113, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 0.75rem;
    border-radius: 6px;
    margin-top: 1rem;
}

.results {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.6rem 0;
    text-align: left;
    font-size: 0.95rem;
}

th {
    color: var(--muted);
    font-weight: normal;
    width: 45%;
}

td {
    font-family: monospace;
    font-size: 1rem;
    color: #e2e8f0;
}

.code-block {
    font-family: monospace;
    background: var(--bg);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    color: var(--accent);
}