/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Variables ──────────────────────────────────────────── */
:root {
  --bg:       #f5f0e8;
  --bg2:      #ffffff;
  --bg3:      #ede8df;
  --border:   #d6cfc4;
  --border2:  #b8b0a4;
  --text:     #1a1a1a;
  --muted:    #6b6560;
  --accent:   #2f81f7;
  --accent-d: #1f6feb;
  --success:  #3fb950;
  --warn:     #d29922;
  --danger:   #f85149;
  --r:        10px;
  --r-sm:     6px;
  --mono:     'JetBrains Mono', monospace;
  --sans:     'Noto Sans SC', sans-serif;
}

/* ── Base ───────────────────────────────────────────────── */
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.6;
}

/* ── Topbar ─────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 52px;
  background: rgba(13,17,23,0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.topbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar-icon {
  width: 28px;
  height: 28px;
  background: var(--accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.topbar-icon svg {
  width: 15px;
  height: 15px;
  fill: #fff;
}

.topbar-name {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #58a6ff;  /* 更亮，更清晰 */
}

.topbar-sub {
  font-size: 11px;
  color: var(--muted);
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ── Page body ──────────────────────────────────────────── */
.page-body {
  max-width: 1300px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

.page-body--narrow {
  max-width: 460px;
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 34px;
  padding: 0 14px;
  border: none;
  border-radius: var(--r-sm);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--sans);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: opacity .15s, transform .1s;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: .4; cursor: not-allowed; }

.btn-blue   { background: var(--accent);    color: #fff; }
.btn-blue:hover  { background: var(--accent-d); }
.btn-green  { background: #238636;          color: #fff; }
.btn-green:hover { background: #2ea043; }
.btn-red    { background: #b91c1c;          color: #fff; }
.btn-red:hover   { background: #991b1b; }
.btn-ghost  {
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--muted);
}
.btn-ghost:hover { color: var(--text); border-color: var(--border2); background: var(--bg3); }

.btn-sm { height: 28px; padding: 0 10px; font-size: 12px; }

/* ── Form controls ──────────────────────────────────────── */
input[type=text],
input[type=password],
input[type=date],
input[type=number],
select,
textarea {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  font-size: 13px;
  font-family: var(--sans);
  padding: 7px 11px;
  height: 34px;
  outline: none;
  width: 100%;
  transition: border-color .15s;
}
input:focus, select:focus { border-color: var(--accent); }
input::placeholder { color: var(--muted); }
input.mono { font-family: var(--mono); letter-spacing: .04em; }

/* ── Card ───────────────────────────────────────────────── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 20px;
  margin-bottom: 16px;
}

.card-title {
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .09em;
  margin-bottom: 14px;
}

/* ── Alert / message box ────────────────────────────────── */
.msg {
  display: none;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  font-weight: 500;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  margin-top: 10px;
}
.msg.success { background: rgba(63,185,80,.12);   color: var(--success); border: 1px solid rgba(63,185,80,.25); }
.msg.error   { background: rgba(248,81,73,.12);   color: var(--danger);  border: 1px solid rgba(248,81,73,.25); }
.msg.warn    { background: rgba(210,153,34,.12);  color: var(--warn);    border: 1px solid rgba(210,153,34,.25); }

/* ── Badge / tag ────────────────────────────────────────── */
.badge {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 500;
}
.badge-warn    { background: rgba(210,153,34,.15); color: #e3b341; }
.badge-month   { background: rgba(47,129,247,.15); color: #58a6ff; }
.badge-quarter { background: rgba(63,185,80,.15);  color: #56d364; }
.badge-year    { background: rgba(210,153,34,.15); color: #e3b341; }

/* ── Spinner ────────────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 13px;
  height: 13px;
  border: 2px solid rgba(255,255,255,.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .65s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Table ──────────────────────────────────────────────── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}
.data-table thead th {
  background: var(--bg3);
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .07em;
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.data-table tbody td {
  padding: 10px 14px;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: rgba(255,255,255,.02); }

/* ── Utility ────────────────────────────────────────────── */
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.text-danger  { color: var(--danger); }
.text-warn    { color: var(--warn); }
.text-success { color: var(--success); }
.text-accent  { color: var(--accent); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.mt-8   { margin-top: 8px; }
.mt-16  { margin-top: 16px; }
.mb-16  { margin-bottom: 16px; }

.section-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  margin-top: 24px;
}

/* ── Action buttons inside table ────────────────────────── */
.act-btns { display: flex; gap: 5px; flex-wrap: wrap; }
.act-btn {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  padding: 3px 9px;
  height: 24px;
  border-radius: 4px;
  cursor: pointer;
  border: none;
  font-family: var(--sans);
  text-decoration: none;
  transition: opacity .15s;
}
.act-btn:hover { opacity: .8; }
.act-edit     { background: #1f6feb; color: #fff; }
.act-del      { background: #b91c1c; color: #fff; }
.act-device   { background: #0d419d; color: #fff; }
.act-activate { background: #9a3412; color: #fff; }

/* ── Stat cards row ─────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}
@media (max-width: 700px) { .stats-row { grid-template-columns: repeat(2,1fr); } }

.stat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 16px;
}
.stat-num   { font-family: var(--mono); font-size: 24px; font-weight: 600; display: block; }
.stat-label { font-size: 11px; color: var(--muted); margin-top: 4px; display: block; }

/* ── Toolbar ────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.toolbar select { width: auto; height: 32px; font-size: 13px; }

/* ── Code grid ──────────────────────────────────────────── */
.code-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(185px, 1fr));
  gap: 8px;
  margin-top: 14px;
}
.code-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 10px 13px;
}
.code-item.used { opacity: .4; }
.code-val  { display: block; font-family: var(--mono); font-size: 13px; font-weight: 600; color: var(--accent); letter-spacing: .04em; }
.code-meta { display: block; font-size: 11px; color: var(--muted); margin-top: 3px; }

/* ── Gen row ────────────────────────────────────────────── */
.gen-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.gen-row select { width: auto; }
.gen-row input[type=number] { width: 70px; font-family: var(--mono); }
.gen-note { font-size: 12px; color: var(--muted); margin-top: 6px; }