:root {
  --bg: #f4f6f8;
  --card: #fff;
  --fg: #1a1f24;
  --muted: #5b6671;
  --accent: #2d8cf0;
  --danger: #e04848;
  --ok: #2a9d58;
  --border: #e1e6ea;
  --shadow: 0 2px 10px rgba(0, 0, 0, .06);
}
:root[data-theme="dark"] {
  --bg: #0f1419;
  --card: #181f27;
  --fg: #e7edf3;
  --muted: #9fb0c0;
  --accent: #4ba3ff;
  --danger: #ff5252;
  --ok: #2ad17a;
  --border: #2a333d;
  --shadow: 0 2px 10px rgba(0, 0, 0, .35);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1419;
    --card: #181f27;
    --fg: #e7edf3;
    --muted: #9fb0c0;
    --accent: #4ba3ff;
    --danger: #ff5252;
    --ok: #2ad17a;
    --border: #2a333d;
    --shadow: 0 2px 10px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.wrap { max-width: 480px; margin: 0 auto; padding: 24px; width: 100%; }
.center { flex: 1; display: flex; align-items: center; justify-content: center; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 32px 28px;
}
h1 { margin: 0 0 8px; font-size: 1.4rem; text-align: center; }
p { color: var(--muted); margin: 0 0 12px; line-height: 1.5; }

.tabs { display: flex; gap: 8px; margin-bottom: 18px; }
.tabs button {
  flex: 1; padding: 10px; border: 1px solid var(--border); background: transparent;
  color: var(--fg); border-radius: 8px; font: inherit; cursor: pointer; min-height: 40px;
}
.tabs button.active { background: var(--accent); color: #fff; border-color: var(--accent); }

form { display: flex; flex-direction: column; gap: 12px; }
label { font-size: .85rem; color: var(--muted); display: block; margin-bottom: 4px; }
input, textarea, select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--fg); font: inherit; min-height: 40px;
}
textarea { min-height: 120px; font-family: ui-monospace, monospace; font-size: .85rem; }

.btn {
  font: inherit; border: 1px solid var(--border); background: var(--card); color: var(--fg);
  border-radius: 8px; padding: 10px 16px; min-height: 44px; cursor: pointer;
}
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn:disabled { opacity: .6; cursor: default; }

.msg { font-size: .85rem; margin-top: 4px; min-height: 1.2em; }
.msg.err { color: var(--danger); }
.msg.ok { color: var(--ok); }

.hidden { display: none !important; }

footer { text-align: center; padding: 16px; font-size: .8rem; color: var(--muted); }
footer a { color: var(--muted); margin: 0 6px; }

table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; cursor: pointer; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; border-bottom: 1px solid var(--border); background: var(--card);
}
.topbar .title { font-weight: 600; }
.nav { display: flex; gap: 6px; padding: 12px 20px 0; }
.nav button {
  padding: 8px 14px; border: none; background: transparent; color: var(--muted);
  border-bottom: 2px solid transparent; font: inherit; cursor: pointer;
}
.nav button.active { color: var(--fg); border-bottom-color: var(--accent); font-weight: 600; }
.panel { padding: 20px; max-width: 960px; margin: 0 auto; width: 100%; }
.placeholder { color: var(--muted); text-align: center; padding: 60px 0; }

.fh2-item { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; margin-bottom: 14px; }
.fh2-item .row { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.fh2-item .key-hint { font-family: ui-monospace, monospace; color: var(--muted); font-size: .85rem; }
.checkrow { display: flex; flex-wrap: wrap; gap: 10px 16px; margin: 10px 0; }
.checkrow label { display: flex; align-items: center; gap: 6px; color: var(--fg); font-size: .85rem; }
.checkrow input { width: auto; min-height: auto; }