:root {
  --bg: #f5f6f8; --panel: #ffffff; --text: #111827; --muted: #6b7280; --border: #e5e7eb;
  --primary: #2563eb; --primary-text: #fff; --danger: #dc2626; --ok: #16a34a; --warn: #d97706;
  --code-bg: #f3f4f6; --sidebar: #0f172a; --sidebar-text: #cbd5e1;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1020; --panel: #111827; --text: #e5e7eb; --muted: #9ca3af; --border: #1f2937;
    --code-bg: #0b1222; --sidebar: #030712; }
}
* { box-sizing: border-box; }
body { margin: 0; font: 14px/1.5 system-ui, -apple-system, Segoe UI, Roboto, sans-serif; background: var(--bg); color: var(--text); }
.hidden { display: none !important; }
h1, h2, h3 { margin: 0 0 .5em; line-height: 1.25; }
h2 { font-size: 22px; } h3 { font-size: 16px; }
a { color: var(--primary); }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; word-break: break-all; }
pre { background: var(--code-bg); padding: 12px; border-radius: 8px; overflow: auto; border: 1px solid var(--border); }
.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 1.2em; }

#app { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: var(--sidebar); color: var(--sidebar-text); padding: 18px 12px; display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; }
.brand { font-weight: 700; font-size: 18px; color: #fff; padding: 0 10px 16px; }
nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
nav a { color: var(--sidebar-text); text-decoration: none; padding: 8px 10px; border-radius: 6px; }
nav a:hover { background: rgba(255,255,255,.06); }
nav a.active { background: var(--primary); color: #fff; }
.user-email { font-size: 12px; padding: 8px 10px; color: var(--sidebar-text); opacity: .8; word-break: break-all; }
.sidebar .logout { color: var(--sidebar-text); border-color: rgba(255,255,255,.15); }
main { flex: 1; padding: 28px 32px; max-width: 1200px; min-width: 0; }

.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 18px; margin-bottom: 16px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; }
.stat .v { font-size: 26px; font-weight: 700; }
.stat .l { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }

.btn { border: 1px solid var(--border); background: var(--panel); color: var(--text); padding: 7px 12px; border-radius: 7px; cursor: pointer; font: inherit; }
.btn:hover { filter: brightness(.97); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn.danger { color: var(--danger); }
.btn.ghost { background: transparent; }
.btn.small { padding: 3px 8px; font-size: 12px; }
.btn:disabled { opacity: .6; cursor: wait; }

label { display: block; font-weight: 500; margin-bottom: 10px; }
label .hint { font-weight: 400; color: var(--muted); font-size: 12px; }
input, select, textarea { width: 100%; margin-top: 4px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 7px; background: var(--panel); color: var(--text); font: inherit; }
textarea { min-height: 120px; font-family: ui-monospace, monospace; font-size: 13px; }
input[type=checkbox] { width: auto; margin: 0 6px 0 0; }
.check { display: flex; align-items: center; font-weight: 400; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.form-grid .full { grid-column: 1 / -1; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
tr.clickable { cursor: pointer; } tr.clickable:hover td { background: rgba(127,127,127,.06); }
.table-wrap { overflow-x: auto; }

.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; background: var(--code-bg); }
.badge.sent, .badge.ok { background: #dcfce7; color: #166534; }
.badge.failed, .badge.ko { background: #fee2e2; color: #991b1b; }
.badge.partial, .badge.deferred, .badge.warn { background: #fef3c7; color: #92400e; }
.badge.queued, .badge.sending { background: #dbeafe; color: #1e40af; }

dialog { border: none; border-radius: 12px; padding: 0; width: min(720px, 94vw); background: var(--panel); color: var(--text); box-shadow: 0 20px 60px rgba(0,0,0,.35); }
dialog::backdrop { background: rgba(0,0,0,.45); }
#modal-body { padding: 22px; max-height: 85vh; overflow: auto; }
.toast { position: fixed; bottom: 20px; right: 20px; background: #111827; color: #fff; padding: 10px 16px; border-radius: 8px; z-index: 100; max-width: 420px; }
.toast.err { background: var(--danger); }

.login { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 16px; }
.login-card { width: 360px; max-width: 100%; }
.dns-value { max-width: 520px; }
.copy { cursor: pointer; }
.notice { border-left: 4px solid var(--warn); background: rgba(217,119,6,.08); padding: 10px 14px; border-radius: 6px; margin-bottom: 14px; }
.key-box { font-size: 15px; padding: 12px; background: var(--code-bg); border-radius: 8px; word-break: break-all; border: 1px dashed var(--primary); }
iframe.preview { width: 100%; height: 360px; border: 1px solid var(--border); border-radius: 8px; background: #fff; }

@media (max-width: 760px) {
  #app { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; }
  nav { flex-direction: row; flex-wrap: wrap; }
  main { padding: 16px; }
  .form-grid { grid-template-columns: 1fr; }
}