:root {
  --black: #121212;
  --white: #ffffff;
  --line: #d7d7d7;
  --muted: #666666;
  --paper: #f5f5f5;
  --danger: #d32f2f;
  --success: #388e3c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--black);
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

.demo-accounts {
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  padding: 10px;
  margin: 18px 0;
  color: var(--muted);
  font-size: 12px;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.check-line {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--black);
  min-height: 42px;
}

.check-line input {
  width: 16px;
  min-height: 16px;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--black);
}

.login-panel {
  width: min(460px, 100%);
  background: var(--white);
  border: 1px solid var(--line);
  padding: 36px;
}

.brand-mark {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  background: var(--black);
  color: var(--white);
  font-weight: 800;
  margin-bottom: 24px;
}

.brand-logo {
  max-width: 180px;
  max-height: 62px;
  object-fit: contain;
  margin-bottom: 24px;
}

.login-footer {
  display: grid;
  gap: 4px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 12px;
}

.login-panel h1,
.page-head h1 {
  margin: 0;
}

.login-panel p,
.eyebrow,
.timestamp,
.panel-head span {
  color: var(--muted);
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 248px;
  background: var(--black);
  color: var(--white);
  display: flex;
  flex-direction: column;
}

.system-title {
  padding: 24px;
  border-bottom: 1px solid #333333;
}

.sidebar-logo {
  display: block;
  max-width: 160px;
  max-height: 46px;
  object-fit: contain;
  margin-bottom: 14px;
  background: var(--white);
  padding: 6px;
}

.system-title strong,
.system-title span {
  display: block;
}

.system-title span {
  margin-top: 6px;
  color: #aaaaaa;
  font-size: 12px;
}

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

nav a,
.logout-form button {
  color: var(--white);
  border: 1px solid transparent;
  padding: 12px 14px;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

nav a.active,
nav a:hover,
.logout-form button:hover {
  border-color: var(--white);
  background: #222222;
}

.logout-form {
  margin-top: auto;
  padding: 16px;
}

.sidebar-contact {
  display: grid;
  gap: 4px;
  padding: 0 16px 16px;
  color: #aaaaaa;
  font-size: 11px;
  line-height: 1.5;
}

.workspace {
  margin-left: 248px;
  padding: 28px;
}

.page-head,
.panel-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
}

.page-head {
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 6px;
  text-transform: uppercase;
  font-size: 12px;
  font-weight: 700;
}

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

.metrics div,
.panel,
.flash {
  background: var(--white);
  border: 1px solid var(--line);
}

.metrics div {
  padding: 18px;
}

.metrics span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 10px;
}

.metrics strong {
  font-size: 26px;
}

.store-balance-card {
  background: var(--black);
  color: var(--white);
  padding: 22px;
  margin-bottom: 16px;
}

.store-balance-card span,
.store-balance-card small {
  display: block;
  color: #cccccc;
}

.store-balance-card strong {
  display: block;
  font-size: 34px;
  margin: 8px 0;
}

.panel {
  padding: 18px;
  margin-bottom: 16px;
}

.alert-panel {
  border-color: var(--danger);
}

.panel h2 {
  margin: 0;
  font-size: 18px;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
  min-width: 760px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 12px 10px;
  text-align: left;
  white-space: nowrap;
}

th {
  background: var(--black);
  color: var(--white);
  font-size: 12px;
}

tr:hover td {
  background: #fafafa;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border: 1px solid var(--black);
  padding: 2px 8px;
  font-size: 12px;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.two {
  grid-template-columns: 1.1fr 0.9fr;
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stack,
.form-grid {
  display: grid;
  gap: 12px;
}

.form-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 14px;
}

.form-grid.wide {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.channel-config-form {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.channel-config-form:first-of-type {
  border-top: 0;
  padding-top: 0;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.table-logo {
  display: block;
  max-width: 96px;
  max-height: 32px;
  object-fit: contain;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--black);
  padding: 11px 12px;
  min-height: 42px;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--black);
  outline-offset: 0;
}

.full {
  grid-column: 1 / -1;
}

button,
.primary,
.danger-button {
  border: 1px solid var(--black);
  padding: 12px 14px;
  background: var(--white);
  color: var(--black);
  cursor: pointer;
  min-height: 44px;
}

.primary {
  background: var(--black);
  color: var(--white);
}

.danger-button {
  background: var(--danger);
  color: var(--white);
  border-color: var(--danger);
}

.flash {
  padding: 12px 14px;
  margin-bottom: 14px;
}

.flash.success {
  border-color: var(--success);
  color: var(--success);
}

.flash.danger,
.danger-text {
  color: var(--danger);
}

.empty {
  color: var(--muted);
  text-align: center;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.detail-grid div {
  border: 1px solid var(--line);
  padding: 12px;
}

.detail-grid span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 8px;
}

.detail-grid strong {
  overflow-wrap: anywhere;
}

.actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.actions-row form {
  display: flex;
  gap: 8px;
  align-items: center;
}

.table-actions {
  margin-top: 0;
}

.table-actions button {
  min-height: 34px;
  padding: 7px 10px;
}

.inline-form input {
  width: 132px;
}

.raw-box {
  margin-top: 16px;
  border: 1px solid var(--line);
  padding: 12px;
}

.raw-box pre {
  overflow: auto;
  margin: 12px 0 0;
  background: var(--paper);
  padding: 12px;
}

@media (max-width: 980px) {
  .sidebar {
    position: static;
    width: auto;
  }

  .workspace {
    margin-left: 0;
    padding: 16px;
  }

  .metrics,
  .grid.two,
  .grid.three,
  .form-grid,
  .form-grid.wide,
  .detail-grid {
    grid-template-columns: 1fr;
  }

  .page-head,
  .panel-head {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 720px) {
  .store-mobile {
    background: var(--white);
  }

  .store-mobile .sidebar {
    position: sticky;
    top: 0;
    z-index: 10;
  }

  .store-mobile .system-title {
    padding: 16px;
  }

  .store-mobile nav {
    grid-template-columns: 1fr;
    padding: 8px 16px 14px;
  }

  .store-mobile .logout-form {
    padding: 0 16px 14px;
  }

  .store-mobile .workspace {
    padding: 14px;
  }

  .store-mobile .page-head {
    margin-bottom: 14px;
  }

  .store-mobile .page-head h1 {
    font-size: 22px;
  }

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

  .store-mobile .metrics div {
    padding: 14px;
  }

  .store-mobile .metrics strong {
    font-size: 20px;
  }

  .store-mobile .panel {
    padding: 14px;
    border-left: 0;
    border-right: 0;
  }

  .store-mobile .store-balance-card {
    margin-left: -14px;
    margin-right: -14px;
  }

  .store-mobile .store-balance-card strong {
    font-size: 32px;
  }

  .store-mobile table {
    min-width: 620px;
  }

  .store-mobile .form-grid {
    grid-template-columns: 1fr;
  }
}