:root {
    --fg: #1f2933;
    --muted: #6b7280;
    --bg: #ffffff;
    --line: #e5e7eb;
    --accent: #1d4ed8;
    --stripe: #f9fafb;
    color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
    :root {
        --fg: #e5e7eb;
        --muted: #9ca3af;
        --bg: #111827;
        --line: #374151;
        --accent: #93c5fd;
        --stripe: #1f2937;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

h1 { font-size: 1.3rem; margin: 0 0 1rem; }

main { max-width: 64rem; margin: 0 auto; padding: 1rem; }

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .5rem 1rem;
    border-bottom: 1px solid var(--line);
}

.site-header .brand { font-weight: 700; color: var(--fg); text-decoration: none; }
.site-header nav { display: flex; align-items: center; gap: 1rem; }
.site-header form { margin: 0; }

button, input, select { font: inherit; color: inherit; background: var(--bg); border: 1px solid var(--line); border-radius: 4px; padding: .3rem .6rem; }
button { cursor: pointer; }

.search-form { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
.search-form input[type=search] { flex: 1 1 16rem; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: .35rem .5rem; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: .85rem; }
tbody tr:nth-child(even) { background: var(--stripe); }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
td.date { white-space: nowrap; color: var(--muted); }
td.date strong { color: var(--fg); font-weight: 600; }

.pagination { display: flex; gap: 1rem; margin: 1rem 0; }
.empty, .muted { color: var(--muted); }

dl.meta { display: grid; grid-template-columns: max-content 1fr; gap: .2rem 1rem; margin: 0 0 1rem; }
dl.meta dt { color: var(--muted); }
dl.meta dd { margin: 0; }

.body-toggle { margin: 1rem 0 .5rem; }
.mail-html { width: 100%; height: 70vh; border: 1px solid var(--line); background: #fff; }
.mail-text { white-space: pre-wrap; overflow-wrap: anywhere; font: inherit; border: 1px solid var(--line); padding: .75rem; margin: 0; }

.login { max-width: 22rem; }
.login form { display: grid; gap: .5rem; }
.login__error { color: #b91c1c; }

.flash { padding: .4rem .75rem; border: 1px solid var(--line); border-radius: 4px; }
.flash--error { color: #b91c1c; border-color: #b91c1c; }
.flash--success { color: #15803d; border-color: #15803d; }
td form { margin: 0; text-align: right; }
td form { display: inline-block; }