:root {
  --color-bg:      #0f172a;
  --color-surface: #1e293b;
  --color-border:  #334155;
  --color-primary: #38bdf8;
  --color-primary-h:#0ea5e9;
  --color-accent:  #38bdf8;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-danger:  #ef4444;
  --color-text:    #f1f5f9;
  --color-muted:   #94a3b8;
  --radius-sm:     8px;
  --radius:        12px;
  --radius-lg:     16px;
  --shadow-sm:     0 1px 3px rgba(0,0,0,0.4);
  --shadow:        0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg:     0 8px 32px rgba(0,0,0,0.5);
  --transition:    0.2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; min-height: 100vh; }
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Segoe UI Emoji', 'Apple Color Emoji', 'Noto Color Emoji', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.fa, .fas, .far, .fa-solid, .fa-regular { font-family: "Font Awesome 6 Free" !important; font-weight: 900; }
.container, .app-shell { width: 100%; max-width: 430px; margin: 0 auto; padding: 0 16px; min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-h); }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }

/* 顶部栏 */
.topbar {
  height: 56px; display: flex; align-items: center; justify-content: space-between;
  margin: 0 -16px; padding: 0 16px; flex-shrink: 0;
  background: #020617; border-bottom: 1px solid var(--color-border);
}
.topbar-brand { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; color: var(--color-text); }
.topbar-brand i { color: var(--color-primary); font-size: 20px; }
.topbar-tag {
  font-size: 12px; color: var(--color-primary);
  border: 1px solid var(--color-border); border-radius: 999px; padding: 2px 10px;
  background: rgba(56,189,248,0.08);
}

/* 被注入 App 的假背景 */
.app-bg {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; opacity: 0.35; padding: 40px 0;
}
.app-bg-title { font-size: 22px; font-weight: 700; }
.app-bg-sub { font-size: 13px; color: var(--color-muted); }

/* 遮罩 + 验证卡片 */
.mask {
  position: fixed; inset: 0; max-width: 430px; margin: 0 auto;
  background: rgba(2, 6, 23, 0.7); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; padding: 16px; z-index: 10;
}
.verify-card {
  width: 100%; background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 24px 20px;
  box-shadow: var(--shadow-lg); animation: popIn 0.25s ease;
}
@keyframes popIn { from { transform: scale(0.92); opacity: 0; } to { transform: scale(1); opacity: 1; } }

.verify-icon {
  width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 50%;
  background: rgba(56,189,248,0.12); display: flex; align-items: center; justify-content: center;
  font-size: 24px; color: var(--color-primary);
}
.verify-icon.success { background: rgba(34,197,94,0.12); color: var(--color-success); }
.verify-title { font-size: 20px; font-weight: 700; text-align: center; line-height: 1.3; }
.verify-desc { font-size: 14px; color: var(--color-muted); text-align: center; margin: 6px 0 18px; }
.verify-welcome { font-size: 14px; color: var(--color-success); text-align: center; margin: 6px 0 18px; }

.field-label { display: block; font-size: 13px; color: var(--color-muted); margin: 12px 0 6px; }
.input-wrap {
  display: flex; align-items: center; gap: 10px;
  background: #0f172a; border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 10px 14px; transition: border-color var(--transition);
}
.input-wrap:focus-within { border-color: var(--color-primary); }
.input-wrap i { color: var(--color-muted); font-size: 14px; }
.input-wrap input {
  flex: 1; background: transparent; border: 0; outline: 0; color: var(--color-text);
  font-size: 15px; font-family: inherit; letter-spacing: 1px;
}
.input-wrap input::placeholder { color: #64748b; letter-spacing: 0; }

.device-box {
  display: flex; align-items: center; justify-content: space-between;
  background: #0f172a; border: 1px dashed var(--color-border); border-radius: var(--radius);
  padding: 10px 14px; font-size: 14px; color: var(--color-muted); letter-spacing: 1px;
}
.copy-btn {
  background: transparent; border: 0; color: var(--color-primary);
  font-size: 15px; padding: 4px;
}

.btn-primary {
  width: 100%; margin-top: 20px; padding: 12px 24px;
  background: var(--color-primary); color: #04121f;
  border: 0; border-radius: var(--radius);
  font-size: 16px; font-weight: 700; transition: all var(--transition);
}
.btn-primary:hover { background: var(--color-primary-h); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); background: var(--color-primary-h); }

.verify-tip { font-size: 12px; color: #64748b; text-align: center; margin-top: 12px; }
.error-msg {
  display: none; margin-top: 14px; font-size: 13px; color: var(--color-danger);
  text-align: center;
}
.error-msg.show { display: block; }

/* 成功信息列表 */
.info-list {
  background: #0f172a; border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 4px 14px; margin-bottom: 4px;
}
.info-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0; font-size: 14px;
}
.info-row + .info-row { border-top: 1px solid rgba(51,65,85,0.6); }
.info-row span { color: var(--color-muted); }
.info-row strong { font-weight: 700; color: var(--color-text); font-size: 14px; }

/* 底部条 */
.footer-bar {
  flex-shrink: 0; height: 52px; margin: 0 -16px; padding: 0 16px;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  font-size: 12px; color: #64748b; border-top: 1px solid var(--color-border);
}
.footer-bar .dot { width: 3px; height: 3px; border-radius: 50%; background: #475569; }

/* 登录页 */
.login-wrap { flex: 1; display: flex; align-items: center; }
.login-card {
  width: 100%; background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 28px 20px; box-shadow: var(--shadow);
}

/* ===== 后台卡密管理页 ===== */
.stat-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 10px; margin: 16px 0;
}
.stat-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 14px 10px; text-align: center;
  box-shadow: var(--shadow-sm);
}
.stat-num { font-size: 22px; font-weight: 700; color: var(--color-primary); line-height: 1.2; }
.stat-label { font-size: 12px; color: var(--color-muted); margin-top: 4px; }
.stat-label i { margin-right: 4px; }

.panel {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 16px;
  margin-bottom: 16px; box-shadow: var(--shadow-sm);
}
.panel-title { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.panel-title i { color: var(--color-primary); margin-right: 6px; font-size: 14px; }
.panel-title-row {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 4px;
}
.panel-title-row .copy-btn { display: flex; align-items: center; gap: 4px; font-size: 13px; }

.type-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  flex: 1; min-width: 100px; padding: 10px 8px; font-size: 13px;
  background: #0f172a; color: var(--color-muted);
  border: 1px solid var(--color-border); border-radius: var(--radius);
  transition: all var(--transition);
}
.chip.active {
  background: rgba(56,189,248,0.12); color: var(--color-primary);
  border-color: var(--color-primary); font-weight: 700;
}
.chip:active { transform: scale(0.97); }

/* 生成结果列表 */
.code-list {
  background: #0f172a; border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 4px 14px; max-height: 220px; overflow-y: auto;
}
.code-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 0; font-size: 14px; letter-spacing: 1px;
}
.code-item + .code-item { border-top: 1px solid rgba(51,65,85,0.6); }
.code-item i { color: var(--color-primary); padding: 6px; }

/* 用卡记录表 */
.card-table { margin-top: 8px; font-size: 13px; }
.table-row {
  display: grid; grid-template-columns: 1.3fr 0.7fr 0.8fr 0.9fr;
  gap: 6px; align-items: center;
  padding: 10px 8px; border-radius: var(--radius-sm);
}
.table-row:nth-child(even) { background: rgba(15,23,42,0.6); }
.table-head { color: var(--color-muted); font-weight: 700; font-size: 12px; }
.tag {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 700;
}
.tag-ok { background: rgba(34,197,94,0.12); color: var(--color-success); }
.tag-off { background: rgba(239,68,68,0.12); color: var(--color-danger); }
.tag-unused { background: rgba(56,189,248,0.12); color: var(--color-primary); }