:root {
    color-scheme: light;
    --bg: #f7f8fb;
    --fg: #1c2230;
    --muted: #606b84;
    --border: #d7dbea;
    --panel: #ffffff;
    --accent: #1f4bcc;
    --accent-hover: #173ca5;
    --notice: #fff4d6;
    --notice-border: #eed290;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, sans-serif;
    background: var(--bg);
    color: var(--fg);
}

.shell {
    width: min(900px, 92vw);
    margin: 0 auto;
}

.site-header {
    border-bottom: 1px solid var(--border);
    background: var(--panel);
}

.site-header .shell {
    padding: 1rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.inline-form {
    margin: 0;
}

.brand {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 650;
}

main.shell {
    padding: 1.25rem 0 2rem;
}

.panel {
    border: 1px solid var(--border);
    background: var(--panel);
    border-radius: 10px;
    padding: 1rem 1.1rem;
    margin-bottom: 1rem;
}

.panel h2,
.panel h3 {
    margin-top: 0;
}

.panel-narrow {
    width: min(520px, 100%);
}

.muted {
    color: var(--muted);
}

.form-grid {
    display: grid;
    gap: 0.6rem;
}

.form-grid input,
.form-grid select {
    width: 100%;
    padding: 0.55rem 0.65rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    font: inherit;
}

.btn {
    display: inline-block;
    text-decoration: none;
    border: 0;
    border-radius: 6px;
    padding: 0.55rem 0.8rem;
    font: inherit;
    cursor: pointer;
}

.btn-primary {
    color: #fff;
    background: var(--accent);
}

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

.btn-light {
    background: #fff;
    color: var(--fg);
    border: 1px solid var(--border);
}

.notice-stack {
    margin-bottom: 1rem;
}

.notice {
    border: 1px solid var(--notice-border);
    background: var(--notice);
    border-radius: 6px;
    padding: 0.6rem 0.75rem;
    margin-bottom: 0.5rem;
}

.kv-grid {
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.8rem;
}

.kv-grid dt {
    font-size: 0.85rem;
    color: var(--muted);
}

.kv-grid dd {
    margin: 0.2rem 0 0;
    font-weight: 600;
}