:root { --bg: #f4f6f9; --card: #fff; --ink: #1e293b; --muted: #64748b; --line: #e2e8f0; --brand: #0f6f6a; --navy: #14202e; --ok: #15803d; --warn: #b45309; --err: #dc2626; }
@media (prefers-color-scheme: dark) { :root { --bg: #0f1722; --card: #17222f; --ink: #e5eaf0; --muted: #94a3b8; --line: #263445; --brand: #2dd4bf; --navy: #0b121b; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.top { background: var(--navy); color: #fff; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; min-height: 56px; }
.brand { color: #fff; font-weight: 700; text-decoration: none; }
nav a { color: #cbd5e1; text-decoration: none; margin-left: 18px; padding: 4px 0; border-bottom: 2px solid transparent; }
nav a.on, nav a:hover { color: #fff; border-color: var(--brand); }
main { padding-top: 24px; padding-bottom: 32px; }
h1 { margin: 0 0 8px; font-size: 1.7rem; } h2 { margin-top: 28px; } h3 { margin-top: 22px; }
.lead { color: var(--muted); max-width: 70ch; }
.muted { color: var(--muted); } .small { font-size: .8rem; } .meta { font-size: .85rem; color: var(--muted); margin: 4px 0; }
.ok { color: var(--ok); font-weight: 600; } .warn { color: var(--warn); font-weight: 600; } .danger { color: var(--err); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin-top: 18px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; color: inherit; text-decoration: none; display: block; transition: border-color .15s, transform .15s; }
.card:hover { border-color: var(--brand); transform: translateY(-2px); }
.card h2 { margin: 0 0 6px; font-size: 1.1rem; }
.thumb { width: 100%; height: 140px; object-fit: cover; border-radius: 8px; margin-bottom: 10px; background: var(--line); }
.preview { max-width: 100%; border-radius: 10px; border: 1px solid var(--line); margin: 8px 0 12px; }
.search { display: flex; gap: 8px; margin: 14px 0; }
input[type=search], input[type=text], input[type=password], select, textarea { width: 100%; padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); color: var(--ink); font: inherit; }
button, .btn { background: var(--brand); color: #fff; border: 0; border-radius: 8px; padding: 9px 16px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-block; }
@media (prefers-color-scheme: dark) { button, .btn { color: #06201e; } }
button.link { background: none; color: var(--brand); padding: 0; font-weight: 400; }
button.link.danger { color: var(--err); }
table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.hash { font: .72rem/1.3 ui-monospace, Consolas, monospace; word-break: break-all; max-width: 260px; }
caption { text-align: left; font-weight: 700; padding: 8px 2px; }
table.admin { margin-bottom: 14px; }
.form { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 18px; display: grid; gap: 12px; max-width: 640px; }
.form.narrow { max-width: 380px; }
.form label { display: grid; gap: 4px; font-size: .88rem; font-weight: 600; }
fieldset { border: 1px dashed var(--line); border-radius: 8px; display: grid; gap: 10px; }
.alert { padding: 10px 14px; border-radius: 8px; margin: 12px 0; } .alert.err { background: #fee2e2; color: #991b1b; } .alert.okbox { background: #dcfce7; color: #166534; }
pre.key, code { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 2px 6px; font-size: .85rem; }
pre.key { padding: 12px; overflow: auto; }
.logout { text-align: right; }
.foot { color: var(--muted); font-size: .8rem; padding-bottom: 30px; }
@media (max-width: 600px) { .hash { max-width: 120px; } th:nth-child(5), td:nth-child(5) { display: none; } }

/* Layout-Korrekturen: lange Inhalte (Schlüssel, Hashes) dürfen Karten nicht sprengen */
.form, .form > * { min-width: 0; }
details.form { display: block; max-width: 760px; }
details.form summary { cursor: pointer; }
details.form p { overflow-wrap: anywhere; }
pre.key { max-width: 100%; margin: 12px 0 0; overflow-x: auto; white-space: pre; box-sizing: border-box; font-size: .8rem; line-height: 1.45; }
main { overflow-wrap: break-word; }
table.admin td { white-space: nowrap; }
table.admin form { margin: 0; }