:root {
  --bg: #f4f6fa; --card: #fff; --text: #1d2433; --muted: #6b7486; --line: #e1e5ee;
  --accent: #1f6feb; --accent-dark: #1858c4; --ok: #1a7f37; --ok-bg: #dcf5e3;
  --warn: #9a6700; --warn-bg: #fff4d6; --err: #c62828; --err-bg: #fde4e4; --off-bg: #eceff4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151c; --card: #1a202a; --text: #e4e8f0; --muted: #8d97a8; --line: #2b3340;
    --accent: #4c8dff; --accent-dark: #3a78e6; --ok: #5cd37a; --ok-bg: #173323;
    --warn: #e7b84a; --warn-bg: #3a2f12; --err: #ff7b7b; --err-bg: #3d1a1a; --off-bg: #262d39;
  }
}
* { box-sizing: border-box; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--off-bg); padding: 1px 6px; border-radius: 4px; font-size: .9em; }
h1 { font-size: 1.5rem; margin: 0 0 .5rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 .75rem; }
.card h2 { margin-top: 0; }

.top { display: flex; align-items: center; gap: 1.5rem; padding: .75rem 1.5rem; background: #1d2433; color: #fff; flex-wrap: wrap; }
.top .brand { color: #fff; font-weight: 600; font-size: 1.05rem; }
.top nav { display: flex; gap: .25rem; align-items: center; flex-wrap: wrap; }
.top nav a, .top nav .link { color: #c8d1e0; padding: .35rem .7rem; border-radius: 6px; font: inherit; }
.top nav a.on, .top nav a:hover, .top nav .link:hover { background: #2f3a50; color: #fff; text-decoration: none; }
.top nav form { margin: 0; }

main { max-width: 1100px; margin: 0 auto; padding: 1.5rem 16px 3rem; }
footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 1rem; }

.head { display: flex; align-items: baseline; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.crumbs { margin: 0 0 .5rem; color: var(--muted); font-size: .9rem; }
.muted { color: var(--muted); }
.empty { color: var(--muted); padding: 1.5rem; text-align: center; background: var(--card); border: 1px dashed var(--line); border-radius: 10px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1.1rem 1.25rem; margin-bottom: 1rem; }
.card.narrow { max-width: 420px; }
main > .card.narrow:only-of-type { margin: 3rem auto; }
.card.inline { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.card.inline input { flex: 1 1 200px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; }
.row { display: flex; gap: 1rem; align-items: center; }

label { display: block; font-weight: 500; margin-bottom: .75rem; font-size: .9rem; }
label small { font-weight: 400; color: var(--muted); }
label.check { display: flex; gap: .5rem; align-items: center; }
input, textarea, select { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: .45rem .6rem; }
label > input:not([type=checkbox]), label > textarea { display: block; width: 100%; margin-top: .25rem; }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.addr { display: flex; align-items: center; margin-top: .25rem; }
.addr input { flex: 1; border-radius: 6px 0 0 6px; }
.addr span { padding: .45rem .6rem; background: var(--off-bg); border: 1px solid var(--line); border-left: 0; border-radius: 0 6px 6px 0; color: var(--muted); font-weight: 400; }
.alias-form { max-width: 640px; }

button { font: inherit; cursor: pointer; border: 1px solid var(--line); background: var(--card); color: var(--text); border-radius: 6px; padding: .45rem .9rem; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: var(--accent-dark); }
button.danger { background: var(--err-bg); color: var(--err); border-color: transparent; }
button.small { padding: .2rem .6rem; font-size: .85rem; }
button.link { background: none; border: 0; }
.danger-zone { border-color: var(--err-bg); }

table.list { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
table.list th { text-align: left; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); padding: .6rem .9rem; border-bottom: 1px solid var(--line); }
table.list td { padding: .6rem .9rem; border-bottom: 1px solid var(--line); vertical-align: top; }
table.list tr:last-child td { border-bottom: 0; }
tr.clickable { cursor: pointer; }
tr.clickable:hover td { background: var(--bg); }
tr.dim td { opacity: .55; }
td form { margin: 0; }
td.right { text-align: right; }
td.nowrap { white-space: nowrap; }
table.log td { font-size: .88rem; word-break: break-all; }
.detail { color: var(--muted); font-size: .78rem; margin-top: .2rem; word-break: break-word; }

.tag { display: inline-block; font-size: .75rem; padding: .1rem .5rem; border-radius: 99px; background: var(--off-bg); color: var(--muted); border: 0; font-weight: 500; }
.tag.ok, .tag.st-sent { background: var(--ok-bg); color: var(--ok); }
.tag.off { background: var(--off-bg); color: var(--muted); }
.tag.st-deferred { background: var(--warn-bg); color: var(--warn); }
.tag.st-bounced, .tag.st-spam, .tag.st-rejected { background: var(--err-bg); color: var(--err); }

.flash { padding: .7rem 1rem; border-radius: 8px; margin-bottom: 1rem; }
.flash.ok { background: var(--ok-bg); color: var(--ok); }
.flash.error { background: var(--err-bg); color: var(--err); }
.mx { padding: .7rem 1rem; border-radius: 8px; margin-bottom: 1rem; }
.mx-ok { background: var(--ok-bg); color: var(--ok); }
.mx-partial, .mx-unknown { background: var(--warn-bg); color: var(--warn); }
.mx-wrong, .mx-missing { background: var(--err-bg); color: var(--err); }
.help summary { cursor: pointer; font-weight: 500; }
.help { margin-top: 2rem; }

@media (max-width: 640px) {
  .top { gap: .5rem; padding: .6rem 16px; }
  table.list th:nth-child(3), table.list td:nth-child(3) { display: none; }
  table.log th:nth-child(4), table.log td:nth-child(4) { display: none; }
}

/* DNS-Einrichtung */
.dns-head { display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; }
.dns-head h2 { margin: 0; }
.small-link { font-size: .85rem; margin-left: auto; }
.dns table.list { margin: .75rem 0; }
.dnstable td.val code { word-break: break-all; }
.dnstable td { font-size: .9rem; }
.dnstable .copy { margin-left: .4rem; }
.dns details { margin-top: .6rem; }
.dns summary { cursor: pointer; font-weight: 500; }
.dns ul { margin: .5rem 0 0; padding-left: 1.2rem; font-size: .9rem; }
pre.zone { background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: .75rem; overflow-x: auto; font-size: .82rem; }
.tag.dns-ok { background: var(--ok-bg); color: var(--ok); }
.tag.dns-warn, .tag.dns-unknown, .tag.dns-missing-opt { background: var(--warn-bg); color: var(--warn); }
.tag.dns-wrong, .tag.dns-missing { background: var(--err-bg); color: var(--err); }
.inline-check { margin: 0; font-weight: 400; white-space: nowrap; }
@media (max-width: 640px) {
  .dnstable th:nth-child(2), .dnstable td:nth-child(2) { display: none; }
}

/* Anleitung & Changelog */
.toc ol { margin: .4rem 0 0; padding-left: 1.3rem; columns: 2; }
.guide h3 { font-size: 1rem; margin: 1.2rem 0 .4rem; }
.guide ol, .guide ul { padding-left: 1.3rem; }
.guide li { margin-bottom: .35rem; }
.guide table.list { margin: .5rem 0 1rem; }
.guide dt { font-weight: 600; margin-top: .9rem; }
.guide dd { margin: .2rem 0 0; color: var(--muted); }
.note { background: var(--bg); border-left: 3px solid var(--accent); padding: .5rem .8rem; border-radius: 0 6px 6px 0; font-size: .9rem; }
section[id] { scroll-margin-top: 1rem; }
.release-head { display: flex; align-items: baseline; gap: .75rem; }
.release-head h2 { margin: 0; }
.release ul { margin: .5rem 0 0; padding-left: 1.3rem; }
footer a { color: inherit; text-decoration: underline; }
@media (max-width: 640px) { .toc ol { columns: 1; } }

/* Zähler */
th.num, td.num { text-align: right; white-space: nowrap; }
td.num .tag { margin-left: .3rem; }

/* Web-Weiterleitung */
.webstatus { margin-top: 1rem; }
select { width: 100%; margin-top: .25rem; }
.use-select { flex: 0 1 auto; width: auto; margin: 0; }