:root {
  --bg: #060b18;
  --card: rgba(18, 32, 66, 0.55);
  --border: #1d3a6e;
  --accent: #3d7bfd;
  --accent2: #2563eb;
  --text: #dbe6ff;
  --dim: #7f93bd;
  --ok: #34d399;
  --bad: #f87171;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: radial-gradient(1200px 600px at 70% 110%, #10204a 0%, var(--bg) 55%);
  color: var(--text);
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  min-height: 100vh;
  padding: 24px 16px 64px;
}
.wrap { max-width: 640px; margin: 0 auto; }
h1 { font-size: 20px; font-weight: 600; }
.dim { color: var(--dim); font-size: 13px; }
.mono { font-family: Consolas, monospace; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  margin-top: 16px;
  backdrop-filter: blur(4px);
}
.card-title { font-size: 15px; font-weight: 600; margin-bottom: 10px; }

button {
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #fff; border: none; border-radius: 12px;
  padding: 12px 20px; font-size: 15px; cursor: pointer;
  box-shadow: 0 0 18px rgba(61, 123, 253, 0.35);
}
button:disabled { opacity: 0.45; cursor: default; box-shadow: none; }
button.ghost { background: transparent; border: 1px solid var(--border); box-shadow: none; color: var(--dim); }
input {
  background: #0a1428; border: 1px solid var(--border); color: var(--text);
  border-radius: 10px; padding: 10px 12px; font-size: 15px; width: 140px;
}

/* 双地区选择（US/HK）房间码 */
.region-bar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin: 10px 0 8px; }
.region-btn {
  padding: 7px 16px; border-radius: 10px; border: 1px solid var(--border);
  background: #0a1428; color: var(--dim); cursor: pointer; font-size: 14px; font-weight: 600;
}
.region-btn.on { border-color: var(--accent); color: var(--accent); background: rgba(61, 123, 253, 0.14); }
.room-input { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.room-prefix { font-weight: 700; color: var(--accent); min-width: 34px; text-align: right; }
input#room:disabled, button#randRoom:disabled, button#joinRoom:disabled { opacity: 0.45; cursor: default; }
.region-tip { font-size: 12px; opacity: 0.8; margin-top: 6px; }
.region-tip.warn { color: #facc15; opacity: 1; }

/* NFC 圆圈动画（读卡端） */
.nfc-ring {
  width: 150px; height: 150px; margin: 18px auto; border-radius: 50%;
  border: 2px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 40px; color: var(--accent);
  box-shadow: 0 0 30px rgba(61, 123, 253, 0.25), inset 0 0 30px rgba(61, 123, 253, 0.12);
  animation: pulse 2s infinite;
}
.nfc-ring.active { border-color: var(--ok); color: var(--ok); box-shadow: 0 0 34px rgba(52, 211, 153, 0.4); }
@keyframes pulse { 50% { box-shadow: 0 0 44px rgba(61, 123, 253, 0.5); } }

.status-chip {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); border-radius: 999px;
  padding: 5px 12px; font-size: 13px; color: var(--dim); margin-right: 8px;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #475569; }
.status-chip.on { color: var(--ok); border-color: #14532d; }
.status-chip.on .dot { background: var(--ok); box-shadow: 0 0 8px var(--ok); }

.brand-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.brand {
  border: 1px solid var(--border); border-radius: 10px; padding: 8px 14px;
  font-weight: 700; font-size: 13px; color: var(--text); background: #0c1730;
  letter-spacing: 0.5px;
}

/* 卡片槽（POS 端）：读卡端贴卡后显示品牌+尾号，replay 补推带徽标 */
.card-slot {
  position: relative; overflow: hidden;
  border: 1px dashed var(--border); border-radius: 14px;
  padding: 16px 18px; min-height: 112px;
  background: #0a1428; color: var(--dim);
  transition: border-color .2s, background .2s;
}
.card-slot::after {
  content: ""; position: absolute; right: -30px; top: -40px;
  width: 140px; height: 140px; border-radius: 50%;
  background: radial-gradient(circle, rgba(61,123,253,.18), transparent 70%);
  pointer-events: none;
}
.card-slot.on { border-style: solid; border-color: rgba(61,123,253,.55); color: var(--text); background: linear-gradient(135deg, #101d3d 0%, #0a1428 60%); }
.card-slot.on.b-visa { border-color: #3d63c9; background: linear-gradient(135deg, #1a1f71 0%, #0f1638 70%); }
.card-slot.on.b-mc { border-color: #8c2530; background: linear-gradient(135deg, #4a1118 0%, #0f1638 70%); }
.card-slot.on.b-amex { border-color: #1e78c8; background: linear-gradient(135deg, #063a6b 0%, #0a1428 70%); }
.card-slot.on.b-up { border-color: #8f2436; background: linear-gradient(135deg, #5b1020 0%, #0f1638 70%); }
.card-slot.on.b-wallet { border-color: #55607a; background: linear-gradient(135deg, #232a3d 0%, #0a1428 70%); }
.slot-brand { font-size: 18px; font-weight: 700; letter-spacing: 1px; }
.slot-pan { margin-top: 10px; font-size: 18px; letter-spacing: 2px; }
.slot-meta { margin-top: 10px; font-size: 12px; color: var(--dim); }
.badge {
  position: absolute; right: 12px; top: 12px;
  display: none; align-items: center;
  border: 1px solid var(--border); border-radius: 999px;
  padding: 3px 10px; font-size: 11px; color: var(--dim); background: rgba(6,11,24,.75);
}
.badge.warn { border-color: #7c5a12; color: #facc15; }
.badge.info { border-color: #1e4d7c; color: #7dd3fc; }

/* 三条件就绪提示 */
.ready-line { margin-top: 12px; font-size: 13px; color: var(--dim); }
.ready-line.ok { color: var(--ok); }
.cache-stat { margin-top: 10px; font-size: 12px; color: var(--dim); }
.cache-stat b { color: var(--ok); font-weight: 600; }
.cache-stat i { color: #facc15; font-style: normal; font-weight: 600; }

/* 日志面板 */
#log {
  margin-top: 14px; max-height: 340px; overflow-y: auto;
  font-family: Consolas, monospace; font-size: 12px;
}
.log-row {
  display: grid; grid-template-columns: 92px 22px 1fr; gap: 4px;
  padding: 7px 8px; border-bottom: 1px solid #12203f; align-items: baseline;
}
.log-t { color: var(--dim); }
.log-dir.out { color: var(--accent); }
.log-dir.in { color: var(--ok); }
.log-label { color: var(--text); }
.log-hex { grid-column: 3 / 5; color: var(--dim); word-break: break-all; }
.log-ms { color: #facc15; text-align: right; }

.result-ok, .result-bad {
  margin-top: 14px; border-radius: 12px; padding: 14px; font-size: 14px; display: none;
}
.result-ok { border: 1px solid #14532d; background: rgba(52, 211, 153, 0.08); color: var(--ok); }
.result-bad { border: 1px solid #7f1d1d; background: rgba(248, 113, 113, 0.08); color: var(--bad); }

table.feed { width: 100%; border-collapse: collapse; font-size: 12px; font-family: Consolas, monospace; }
table.feed td { padding: 6px 8px; border-bottom: 1px solid #12203f; vertical-align: top; word-break: break-all; }
table.feed td:first-child { color: var(--dim); white-space: nowrap; }

a.btn-link {
  display: block; text-decoration: none; color: var(--text);
  border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; margin-top: 12px;
  background: var(--card);
}
a.btn-link:hover { border-color: var(--accent); }
a.btn-link b { color: var(--accent); }

.flow { display: flex; align-items: center; justify-content: space-between; gap: 6px; margin-top: 14px; flex-wrap: wrap; }
.flow .node {
  border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px;
  font-size: 12px; text-align: center; background: #0c1730; flex: 1; min-width: 90px;
}
.flow .arrow { color: var(--accent); font-size: 18px; }
.notice { margin-top: 20px; font-size: 12px; color: var(--dim); line-height: 1.7; }

/* 单碰卡操作提示 / 下载链接 / 阶段标签 / 页脚版本 */
/* 失败恢复引导（POS 端 result-bad 内嵌） */
.result-bad { text-align: left; }
.bad-title { margin-bottom: 6px; font-weight: 600; word-break: break-all; }
.guide { margin-top: 10px; border-top: 1px solid #5c2626; padding-top: 10px; }
.guide-title { color: #fca5a5; font-size: 13px; font-weight: 600; }
.guide-stage { margin-top: 4px; font-size: 12px; word-break: break-all; }
.guide-steps { margin: 8px 0 10px 18px; font-size: 12px; line-height: 1.75; color: #fecaca; }
.guide-steps li { margin-bottom: 2px; }
.guide-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.guide-actions button { padding: 8px 14px; font-size: 13px; box-shadow: none; }
.guide-cond { font-size: 12px; }
.guide-cond.ok { color: var(--ok); }
.sop { text-align: center; margin-top: 8px; padding: 0 6px; font-size: 12px; line-height: 1.65; color: var(--dim); }
a.dl-link { color: var(--accent); text-decoration: none; font-weight: 600; }
a.dl-link:hover { text-decoration: underline; }
.stage-tag { color: #7dd3fc; font-weight: 600; white-space: nowrap; }
#verFoot { margin-top: 22px; text-align: center; }

/* ---- 移动端（<=560px）：监控台表格改块状换行，避免 4 列挤压 ---- */
@media (max-width: 560px) {
  body { padding: 16px 10px 48px; }
  .wrap { max-width: 100%; }
  h1 { font-size: 18px; }
  .card { padding: 14px; border-radius: 14px; }
  input { width: 100%; max-width: 220px; }
  #roomState { display: block; margin: 8px 0 0 0 !important; }
  .brand-row { gap: 6px; }
  .brand { padding: 6px 10px; font-size: 12px; }
  .status-chip { margin-bottom: 6px; }
  .slot-pan { font-size: 16px; letter-spacing: 1px; }

  .log-row { grid-template-columns: 72px 18px 1fr; gap: 3px; padding: 6px 4px; font-size: 11px; }
  .log-hex { grid-column: 1 / -1; padding-left: 0; }
  .log-ms { grid-column: 1 / -1; text-align: left; }

  .flow { gap: 4px; }
  .flow .arrow { display: none; }
  .flow .node { flex: 1 1 40%; min-width: 0; padding: 8px 6px; font-size: 11px; }

  /* 监控台/在线分组等 3-4 列表格：窄屏每条记录改成块状，字段各自换行 */
  table.feed, table.feed tbody, table.feed tr, table.feed td { display: block; width: 100%; }
  table.feed tr { border-bottom: 1px solid #12203f; padding: 6px 4px; }
  table.feed tr:last-child { border-bottom: none; }
  table.feed td { border-bottom: none; padding: 0; line-height: 1.45; }
  table.feed td:first-child { white-space: normal; }
  table.feed td:empty { display: none; }
}