:root {
    --fg: #1b1f24;
    --muted: #5b6470;
    --border: #d4d9df;
    --bg-soft: #f5f7f9;
    --accent: #0037ff;
    --ok: #0a7a3d;
    --bad: #c4291c;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--fg);
}

body {
    margin: 0;
    background: #fff;
}

main {
    max-width: 860px;
    margin: 0 auto;
    padding: 32px 20px 64px;
}

h1 {
    margin: 0 0 4px;
    font-size: 1.6rem;
}

h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
}

h3 {
    font-size: 1rem;
    margin: 16px 0 8px;
}

.subtitle, .muted, .hint {
    color: var(--muted);
}

.hint {
    margin: 4px 0 16px;
    font-size: 0.85rem;
}

code {
    font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
    font-size: 0.9em;
    background: var(--bg-soft);
    padding: 1px 4px;
    border-radius: 3px;
}

form {
    margin-top: 24px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 8px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 4px;
}

input {
    box-sizing: border-box;
    width: 100%;
    padding: 8px 10px;
    font: 0.95rem ui-monospace, "Cascadia Code", Consolas, monospace;
    border: 1px solid var(--border);
    border-radius: 4px;
}

input:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

button {
    padding: 9px 22px;
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    background: var(--accent);
    border: 0;
    border-radius: 4px;
    cursor: pointer;
}

button:disabled {
    opacity: 0.6;
    cursor: progress;
}

pre {
    margin: 8px 0;
    padding: 12px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
    font: 0.85rem/1.45 ui-monospace, "Cascadia Code", Consolas, monospace;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 4px;
}

details {
    margin: 8px 0;
}

summary {
    cursor: pointer;
    font-weight: 600;
}

a {
    color: var(--accent);
}

.guide {
    margin-top: 40px;
    padding-top: 8px;
    border-top: 1px solid var(--border);
}

.guide p, .guide li {
    line-height: 1.5;
}

.guide h3 {
    margin-top: 28px;
}

.flow li {
    margin-bottom: 8px;
}

.settings-guide th {
    width: auto;
    background: var(--bg-soft);
}

.settings-guide td:first-child {
    width: 30%;
}

pre.code {
    white-space: pre;
    word-break: normal;
}

.diagnostics {
    margin-top: 32px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

th, td {
    padding: 6px 8px;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--border);
    word-break: break-all;
}

th {
    width: 32%;
    font-weight: 600;
}

.badge {
    padding: 2px 10px;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 999px;
    color: #fff;
}

.badge.ok {
    background: var(--ok);
}

.badge.bad {
    background: var(--bad);
}

.error {
    overflow-wrap: anywhere;
    padding: 10px 12px;
    color: var(--bad);
    background: #fdecea;
    border: 1px solid #f5c2bd;
    border-radius: 4px;
}