:root {
  --bg: #0f1216;
  --panel: #171c23;
  --panel2: #1e242c;
  --line: #2a323d;
  --text: #e6ebf2;
  --muted: #8b98a9;
  --accent: #3b82f6;
  --ok: #22c55e;
  --warn: #f59e0b;
  --err: #ef4444;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.55 -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
}

.hidden { display: none !important; }
.muted { color: var(--muted); font-size: 12px; }
.spacer { flex: 1; }

/* login */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 32px;
  width: 320px;
  text-align: center;
}
.login-card h1 { margin: 0 0 6px; font-size: 20px; }
.login-card input {
  width: 100%;
  margin: 16px 0 10px;
  padding: 10px 12px;
}
.login-card button { width: 100%; }

/* header */
header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-weight: 600; font-size: 16px; }
.chan-select { display: flex; align-items: center; gap: 8px; }
.chan-select label { color: var(--muted); font-size: 12px; }

main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}
.card h2 {
  margin: 0 0 14px;
  font-size: 15px;
  font-weight: 600;
}
.card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.card-head h2 { margin: 0; }

/* form */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12px;
  color: var(--muted);
}
.form-grid label.wide { grid-column: 1 / -1; }

input, select {
  background: var(--panel2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  font: inherit;
  font-size: 13px;
  outline: none;
}
input:focus, select:focus { border-color: var(--accent); }
select { min-width: 200px; }

button {
  border: 1px solid var(--line);
  background: var(--panel2);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 14px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: .15s;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { filter: brightness(1.1); }
button.primary:disabled { opacity: .55; cursor: not-allowed; }
button.ghost { background: transparent; }
button.small { padding: 4px 10px; font-size: 12px; }
button.danger { color: var(--err); border-color: #4a2a2f; }

.row-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.msg { font-size: 12px; }
.msg.err { color: var(--err); }
.msg.ok { color: var(--ok); }

pre {
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  margin: 12px 0 0;
  white-space: pre-wrap;
  word-break: break-all;
  font: 12px/1.6 ui-monospace, Consolas, monospace;
  max-height: 340px;
  overflow: auto;
}

/* table */
.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th, td {
  text-align: left;
  padding: 9px 10px;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
th {
  color: var(--muted);
  font-weight: 500;
  font-size: 12px;
  white-space: nowrap;
}
td.mono {
  font: 12px ui-monospace, Consolas, monospace;
  color: var(--muted);
  word-break: break-all;
  max-width: 240px;
}
td.acts { white-space: nowrap; }
td.acts button { margin-right: 4px; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 11px;
  border: 1px solid var(--line);
}
.badge.ok { color: var(--ok); border-color: #1e5232; }
.badge.disabled { color: var(--muted); }
.badge.expired { color: var(--warn); border-color: #5a4515; }
.badge.quota { color: var(--err); border-color: #4a2a2f; }

.empty {
  text-align: center;
  color: var(--muted);
  padding: 26px;
  font-size: 13px;
}

/* toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  background: #22293240;
  backdrop-filter: blur(9px);
  border: 1px solid var(--line);
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 13px;
  z-index: 100;
  max-width: 80vw;
}
.toast.err { border-color: #63303a; }
.toast.ok { border-color: #235b39; }

@media (max-width: 720px) {
  header { flex-wrap: wrap; }
  .chan-select select { min-width: 140px; }
}