:root {
  --bg: #f5f7f8;
  --surface: #ffffff;
  --surface-soft: #f9fbfb;
  --text: #172126;
  --muted: #66757c;
  --line: #dce5e6;
  --line-strong: #c8d4d6;
  --green: #18a77f;
  --green-dark: #0f755c;
  --green-soft: #e7f7f2;
  --blue: #315d8f;
  --amber: #9a6515;
  --amber-soft: #fff5dd;
  --red: #b92c22;
  --red-soft: #fff0ee;
  --usage-activation-bg: #d8eee7;
  --usage-activation-text: #0b604b;
  --usage-activation-border: #b4ddd0;
  --usage-card-bg: #e2e8f6;
  --usage-card-text: #344b81;
  --usage-card-border: #c7d2eb;
  --usage-unbound-bg: #f7e2df;
  --usage-unbound-text: #922c24;
  --usage-unbound-border: #edc5bf;
  --shadow: 0 16px 36px rgba(30, 50, 55, 0.08);
  --radius: 8px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

body.forced-announcement-open,
body.usage-history-error-open {
  overflow: hidden;
}

.login-loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(19, 34, 30, 0.48);
  backdrop-filter: blur(3px);
}

.login-loading-dialog {
  width: min(360px, 100%);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: center;
}

.login-loading-spinner {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border: 4px solid var(--green-soft);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: login-loading-spin 0.8s linear infinite;
}

.login-loading-dialog h2 {
  margin: 0;
  font-size: 22px;
}

.login-loading-dialog p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

@keyframes login-loading-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .login-loading-spinner {
    animation-duration: 1.6s;
  }
}

.forced-announcement-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(19, 34, 30, 0.62);
  backdrop-filter: blur(3px);
}

.forced-announcement-overlay[hidden] {
  display: none;
}

.forced-announcement-dialog {
  width: min(460px, 100%);
  max-height: calc(100vh - 48px);
  overflow-y: auto;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: center;
}

.forced-announcement-mark {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--amber-soft);
  color: var(--amber);
  font-size: 24px;
  font-weight: 900;
}

.forced-announcement-label {
  display: inline-flex;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--red-soft);
  color: var(--red);
  font-size: 12px;
  font-weight: 800;
}

.forced-announcement-dialog h2 {
  margin: 12px 0 16px;
  font-size: 22px;
}

.forced-announcement-text {
  padding: 16px 0;
  border-top: 1px solid var(--line);
  color: var(--text);
  line-height: 1.8;
  text-align: left;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.forced-announcement-dialog .button {
  width: 100%;
  margin-top: 8px;
}

.forced-announcement-tip {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.usage-history-error-dialog {
  width: min(420px, 100%);
}

.usage-history-error-mark {
  background: var(--red-soft);
  color: var(--red);
}

.usage-history-error-dialog .forced-announcement-text {
  text-align: center;
}

.app {
  min-height: 100vh;
}

.login-screen {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(360px, 0.8fr) minmax(480px, 1.2fr);
  background: var(--surface);
}

.login-brand {
  padding: 56px;
  background: #eef7f4;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.brand-mark,
.sidebar-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: var(--green);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 20px;
}

.login-brand h1 {
  margin: 28px 0 14px;
  font-size: 32px;
  line-height: 1.18;
  letter-spacing: 0;
}

.login-brand p,
.login-foot {
  color: var(--muted);
  line-height: 1.8;
  margin: 0;
}

.login-panel {
  padding: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  width: min(420px, 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 30px;
  box-shadow: var(--shadow);
}

.login-card h2,
.section-title h2 {
  margin: 0;
  font-size: 24px;
  letter-spacing: 0;
}

.login-card p,
.section-title p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.field {
  display: grid;
  gap: 6px;
  margin-top: 16px;
}

.field label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.field input,
.field select,
.field textarea,
.toolbar input,
.toolbar select {
  width: 100%;
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--text);
  border-radius: var(--radius);
  padding: 10px 12px;
  min-height: 40px;
  outline: none;
}

.field input:focus,
.field select:focus,
.field textarea:focus,
.toolbar input:focus,
.toolbar select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(24, 167, 127, 0.12);
}

.button {
  border: 1px solid transparent;
  background: var(--green);
  color: #fff;
  border-radius: var(--radius);
  min-height: 40px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 800;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
}

.button:hover {
  background: var(--green-dark);
}

.button.secondary {
  background: #fff;
  color: var(--text);
  border-color: var(--line-strong);
}

.button.secondary:hover {
  background: var(--surface-soft);
}

.button.danger {
  background: #fff;
  color: var(--red);
  border-color: #e4b8b3;
}

.button.danger:hover {
  background: var(--red-soft);
}

.button.block {
  width: 100%;
  margin-top: 18px;
}

.layout {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
}

.sidebar {
  background: #ffffff;
  border-right: 1px solid var(--line);
  padding: 20px 14px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 6px 18px;
  border-bottom: 1px solid var(--line);
}

.sidebar-head strong {
  display: block;
  font-size: 16px;
}

.sidebar-head span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: grid;
  gap: 6px;
  padding-top: 16px;
}

.nav button {
  border: 0;
  background: transparent;
  color: var(--muted);
  border-radius: var(--radius);
  min-height: 40px;
  padding: 0 12px;
  text-align: left;
  font-size: 14px;
  font-weight: 800;
}

.nav button.active,
.nav button:hover {
  background: var(--green-soft);
  color: var(--green-dark);
}

.main {
  min-width: 0;
  padding: 20px 24px 36px;
}

.topbar {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.topbar h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0;
}

.topbar p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

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

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 16px;
  align-items: start;
}

.content-grid.single {
  grid-template-columns: minmax(0, 1fr);
}

.dashboard-search-panel {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(420px, 1.2fr);
  align-items: center;
  gap: 20px;
  margin-bottom: 16px;
  padding: 18px;
  border: 1px solid #b9dfd4;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--surface) 0%, var(--green-soft) 100%);
  box-shadow: 0 1px 0 rgba(23, 33, 38, 0.03);
}

.dashboard-search-copy {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.dashboard-search-copy h2 {
  margin: 0;
  font-size: 18px;
}

.dashboard-search-copy p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.dashboard-search-icon {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--green);
  color: #fff;
}

.dashboard-search-icon svg,
.dashboard-search-button svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

.dashboard-search-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  min-width: 0;
}

.dashboard-search-form input {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  padding: 10px 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  outline: none;
}

.dashboard-search-form input:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(24, 167, 127, 0.12);
}

.dashboard-search-button {
  min-width: 96px;
  min-height: 44px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.panel,
.metric,
.table-panel,
.detail-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(23, 33, 38, 0.03);
}

.panel,
.table-panel,
.detail-panel {
  padding: 16px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-head h3,
.table-panel h3,
.detail-panel h3 {
  margin: 0;
  font-size: 17px;
}

.panel-head p,
.table-panel p,
.detail-panel p,
.muted {
  margin: 5px 0 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 13px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.metric {
  padding: 14px;
  min-height: 90px;
}

.metric span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.metric strong {
  display: block;
  margin-top: 10px;
  font-size: 26px;
  letter-spacing: 0;
}

.metric small {
  display: block;
  color: var(--muted);
  margin-top: 6px;
}

.tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 10px;
}

.tab {
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--muted);
  min-height: 36px;
  border-radius: var(--radius);
  padding: 0 12px;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 800;
}

.tab.active {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}

.random-code {
  border: 1px dashed #9bd1c3;
  background: #f6fffc;
  border-radius: var(--radius);
  padding: 14px;
  display: grid;
  gap: 10px;
}

.random-code .code {
  font-size: 22px;
  font-weight: 900;
  color: var(--green-dark);
  word-break: break-all;
}

.toolbar {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 140px 140px auto;
  gap: 8px;
  margin-bottom: 12px;
}

.usage-history-toolbar {
  display: grid;
  grid-template-columns: 160px minmax(170px, 1fr) minmax(170px, 1fr) auto;
  gap: 10px;
  align-items: end;
  margin-top: 16px;
}

.usage-history-toolbar label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.usage-history-toolbar input,
.usage-history-toolbar select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 8px 10px;
  font: inherit;
}

.usage-history-toolbar input:focus,
.usage-history-toolbar select:focus {
  outline: 3px solid rgba(24, 184, 143, 0.16);
  border-color: var(--green);
}

.usage-history-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 16px;
  align-items: start;
}

.usage-summary-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 12px;
}

.usage-total {
  margin-bottom: 0;
}

.usage-count-cell {
  position: relative;
  min-width: 180px;
  min-height: 28px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface-soft);
  padding: 0 10px;
}

.usage-count-bar {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: var(--radius);
  background: var(--green-soft);
}

.usage-count-cell strong {
  position: relative;
  z-index: 1;
  color: var(--green-dark);
}

.usage-count-cell.unbound .usage-count-bar {
  background: var(--red-soft);
}

.usage-count-cell.unbound strong {
  color: var(--red);
}

.usage-stats-table,
.usage-detail-table {
  min-width: 760px;
}

.usage-period-button {
  appearance: none;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--green-dark);
  cursor: pointer;
  padding: 7px 10px;
  font: inherit;
  font-weight: 900;
  white-space: nowrap;
}

.usage-period-button:hover {
  background: var(--green-soft);
}

.usage-period-button.selected {
  background: var(--green);
  color: #fff;
  box-shadow: 0 6px 16px rgba(16, 129, 100, 0.2);
}

.usage-number {
  display: inline-flex;
  min-width: 42px;
  justify-content: center;
  border-radius: 999px;
  padding: 6px 10px;
  background: var(--usage-activation-bg);
  color: var(--usage-activation-text);
  border: 1px solid var(--usage-activation-border);
  font-variant-numeric: tabular-nums;
  font-weight: 900;
  line-height: 1.1;
}

.usage-number.card {
  background: var(--usage-card-bg);
  color: var(--usage-card-text);
  border-color: var(--usage-card-border);
}

.usage-number.unbound {
  background: var(--usage-unbound-bg);
  color: var(--usage-unbound-text);
  border-color: var(--usage-unbound-border);
}

.usage-drilldown-prompt {
  min-height: 150px;
  display: grid;
  place-items: center;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--muted);
  font-weight: 800;
  text-align: center;
  padding: 24px;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 13px;
  vertical-align: middle;
}

th {
  background: var(--surface-soft);
  color: var(--muted);
  font-weight: 800;
}

tr:last-child td {
  border-bottom: 0;
}

tbody tr {
  cursor: default;
}

tbody tr.clickable {
  cursor: pointer;
}

tbody tr.clickable:hover {
  background: #f8fbfa;
}

.code-text {
  font-family: Consolas, "SFMono-Regular", monospace;
  font-weight: 800;
  color: var(--text);
  word-break: break-all;
}

.batch-link {
  appearance: none;
  border: 0;
  background: transparent;
  padding: 0;
  color: #00658f;
  font: inherit;
  font-family: Consolas, "SFMono-Regular", monospace;
  font-weight: 800;
  line-height: 1.4;
  white-space: nowrap;
  word-break: normal;
  cursor: pointer;
}

.batch-link:hover {
  color: #004f73;
  text-decoration: underline;
}

.status {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  background: var(--surface-soft);
  color: var(--muted);
  border: 1px solid var(--line);
}

.status.unused {
  background: var(--green-soft);
  color: var(--green-dark);
  border-color: #b9dfd4;
}

.status.used {
  background: #edf3fb;
  color: var(--blue);
  border-color: #c8d9ed;
}

.status.disabled,
.status.revoked,
.status.recycled,
.status.channel_paused {
  background: var(--red-soft);
  color: var(--red);
  border-color: #e5b2ad;
}

.row-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.icon-button {
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--text);
  border-radius: var(--radius);
  min-height: 32px;
  padding: 0 9px;
  font-size: 12px;
  font-weight: 800;
}

.icon-button:hover {
  background: var(--surface-soft);
}

.icon-button.danger {
  color: var(--red);
  border-color: #e4b8b3;
}

.detail-page {
  position: static;
}

.detail-page-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
}

.detail-page-grid {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.detail-page-grid > div {
  min-width: 0;
}

.detail-page .mini-list:first-child {
  margin-top: 0;
}

.user-summary {
  display: grid;
  gap: 8px;
  padding: 12px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 14px;
}

.user-summary strong {
  font-size: 20px;
}

.mini-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.mini-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  background: #fff;
}

.mini-item strong {
  display: block;
  margin-bottom: 3px;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 12px;
}

.empty {
  border: 1px dashed var(--line-strong);
  color: var(--muted);
  background: var(--surface-soft);
  border-radius: var(--radius);
  padding: 22px;
  text-align: center;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  min-width: 220px;
  max-width: min(520px, calc(100vw - 32px));
  background: #172126;
  color: #fff;
  border-radius: var(--radius);
  padding: 12px 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
  z-index: 30;
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.error {
  color: var(--red);
  background: var(--red-soft);
  border: 1px solid #e5b2ad;
  border-radius: var(--radius);
  padding: 10px 12px;
  margin-top: 14px;
}

.loading {
  min-height: 220px;
  display: grid;
  place-items: center;
  color: var(--muted);
}

@media (max-width: 1100px) {
  .dashboard-search-panel {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .content-grid,
  .detail-page-grid,
  .usage-history-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .login-screen {
    grid-template-columns: 1fr;
  }

  .login-brand,
  .login-panel {
    padding: 28px 18px;
  }

  .login-foot {
    margin-top: 30px;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
    padding: 12px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 4px;
    overflow-x: auto;
  }

  .nav button {
    text-align: center;
    white-space: nowrap;
    padding: 0 8px;
  }

  .main {
    padding: 16px 12px 28px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .metrics {
    grid-template-columns: 1fr 1fr;
  }

  .toolbar {
    grid-template-columns: 1fr;
  }

  .usage-history-toolbar {
    grid-template-columns: 1fr 1fr;
  }

  .usage-summary-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .dashboard-search-form {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .panel-head,
  .detail-page-head {
    flex-direction: column;
  }

  .detail-page-head .button {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .dashboard-search-panel {
    padding: 14px;
  }

  .dashboard-search-form {
    grid-template-columns: 1fr;
  }

  .dashboard-search-button {
    width: 100%;
  }

  .usage-history-toolbar {
    grid-template-columns: 1fr;
  }

  .metrics {
    grid-template-columns: 1fr;
  }

  .usage-summary-metrics {
    grid-template-columns: 1fr;
  }

  .login-card {
    padding: 22px;
  }

  .random-code .code {
    font-size: 18px;
  }
}