:root {
  --color-primary: #3EA887;
  --color-primary-hover: #349073;
  --color-primary-contrast: #F4FFFA;
  --color-primary-rgb: 62, 168, 135;
  --color-danger: #E56B73;
  --color-danger-hover: #CF5B64;
  --color-success: #4CBF92;
  --color-warning: #E2A44A;
  --color-text: #E6ECE9;
  --color-text-secondary: #9AA8A1;
  --color-border: #2A3430;
  --color-bg: #080A0B;
  --color-card: #111517;
  --color-input-bg: #0D1113;
  --color-success-bg: #103127;
  --color-success-text: #78D4B1;
  --color-success-border: #1D4E3D;
  --color-danger-bg: #33171B;
  --color-danger-text: #F3A0A8;
  --color-danger-border: #5A2A31;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.45);
  --shadow-md: 0 16px 28px rgba(0,0,0,0.45);
  --radius: 8px;
  --radius-lg: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Layout ── */

.page-center {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 24px;
}

.page-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px;
}

.card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  padding: 32px;
  width: 100%;
}

.card-narrow { max-width: 420px; }
.card + .card { margin-top: 24px; }

.card-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 24px;
}

.card-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-top: -16px;
  margin-bottom: 24px;
}

/* ── Nav ── */

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--color-card);
  box-shadow: var(--shadow-sm);
  margin-bottom: 32px;
}

.top-nav-max-1280 {
  width: 100%;
  max-width: none;
  margin-left: 0;
  margin-right: 0;
  justify-content: space-between;
  gap: 24px;
  padding-left: max(24px, calc((100% - 720px) / 2 + 24px));
  padding-right: max(24px, calc((100% - 720px) / 2 + 24px));
}

.top-nav-max-1280 .brand {
  flex-shrink: 0;
}

.top-nav-max-1280 .nav-links {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.top-nav .brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.top-nav .nav-links { display: flex; gap: 20px; }

.top-nav .nav-links a {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

.top-nav .nav-links a:hover,
.top-nav .nav-links a.active { color: var(--color-primary); font-weight: 600; }

/* ── Tabs ── */

.tabs {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 24px;
}

.tab {
  flex: 1;
  text-align: center;
  padding: 10px 0;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ── Form ── */

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--color-input-bg);
  color: var(--color-text);
  transition: border-color 0.15s;
  outline: none;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb),0.22);
}

.form-group input:read-only {
  background: var(--color-bg);
  color: var(--color-text-secondary);
}

.form-row {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

.form-row .form-group { flex: 1; }
.form-row .form-group:last-child { flex: 0 0 auto; }

/* 验证码输入行：错误提示出现时保持按钮与输入框对齐 */
.form-row-verify {
  align-items: flex-start;
}

.form-row-verify .form-group {
  margin-bottom: 0;
}

.form-hint {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.form-group input.input-error,
.form-group select.input-error {
  border-color: var(--color-danger);
}

.form-group input.input-error:focus,
.form-group select.input-error:focus {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.12);
}

.form-error {
  font-size: 12px;
  color: var(--color-danger);
  margin-top: 4px;
}

/* ── Buttons ── */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
}
.btn-primary:hover:not(:disabled) { background: var(--color-primary-hover); }

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}
.btn-danger:hover:not(:disabled) { background: var(--color-danger-hover); }

.btn-outline {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.btn-outline:hover:not(:disabled) {
  border-color: var(--color-text-secondary);
  color: var(--color-text);
}

.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-block { width: 100%; }

.btn + .btn { margin-left: 8px; }

/* ── Data display ── */

.info-grid {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 12px 16px;
  font-size: 14px;
}

.info-grid .label {
  color: var(--color-text-secondary);
  font-weight: 500;
}

.stat-row {
  display: flex;
  gap: 24px;
  margin-bottom: 20px;
}

.stat-item {
  flex: 1;
  text-align: center;
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius);
}

.stat-item .stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-item .stat-label {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* ── Card list (virtual cards) ── */

.vcard-list { display: flex; flex-direction: column; gap: 12px; }

.vcard {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background: var(--color-bg);
  border-radius: var(--radius);
  font-size: 14px;
}

.vcard .vcard-info { display: flex; flex-direction: column; gap: 2px; }
.vcard .vcard-info .vcard-label { font-size: 12px; color: var(--color-text-secondary); }

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
}

.badge-active { background: var(--color-success-bg); color: var(--color-success-text); }
.badge-inactive { background: var(--color-danger-bg); color: var(--color-danger-text); }

/* ── Capability list ── */

.cap-list { display: flex; flex-direction: column; gap: 16px; }

.cap-item {
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius);
}

.cap-item .cap-name {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 4px;
}

.cap-item .cap-meta {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.cap-item .cap-pricing {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cap-item .cap-price-tag {
  padding: 4px 10px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 12px;
}

/* ── Toast ── */

.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  color: #fff;
  box-shadow: var(--shadow-md);
  animation: toast-in 0.25s ease-out;
  max-width: 360px;
  word-break: break-word;
}

.toast-success { background: var(--color-success); }
.toast-error { background: var(--color-danger); }
.toast-warning { background: var(--color-warning); color: var(--color-text); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Section divider ── */

.section-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 24px 0;
}

/* ── Links ── */

.link {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 13px;
}

.link:hover { text-decoration: underline; }

.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-8 { margin-top: 8px; }
.hidden { display: none !important; }

/* ── Modal ── */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9998;
}

.modal {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 400px;
  width: 90%;
  box-shadow: var(--shadow-md);
}

.modal-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
}

.modal-body { font-size: 14px; margin-bottom: 20px; color: var(--color-text-secondary); }

.modal-actions { display: flex; justify-content: flex-end; gap: 8px; }

/* ── Billing ── */

.billing-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.billing-toolbar select {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--color-input-bg);
  color: var(--color-text);
  outline: none;
}

.billing-toolbar select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb),0.22);
}

.billing-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.billing-summary-item {
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius);
  text-align: center;
}

.billing-summary-item .summary-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
}

.billing-summary-item .summary-label {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.billing-breakdown { margin-bottom: 24px; }

.billing-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.billing-table th,
.billing-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.billing-table th {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  background: var(--color-bg);
}

.billing-table td { color: var(--color-text); }

.billing-table tr:last-child td { border-bottom: none; }

.billing-detail-item {
  padding: 14px 16px;
  background: var(--color-bg);
  border-radius: var(--radius);
  font-size: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.billing-detail-item + .billing-detail-item { margin-top: 8px; }

.billing-detail-left { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.billing-detail-left .detail-model { font-weight: 500; word-break: break-all; }
.billing-detail-left .detail-meta { font-size: 12px; color: var(--color-text-secondary); }

.billing-detail-right { text-align: right; flex-shrink: 0; }
.billing-detail-right .detail-credits { font-size: 16px; font-weight: 600; color: var(--color-primary); }
.billing-detail-right .detail-time { font-size: 12px; color: var(--color-text-secondary); margin-top: 2px; }

.billing-load-more {
  text-align: center;
  padding: 16px 0;
}

.billing-empty {
  text-align: center;
  padding: 32px 0;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.type-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
  background: rgba(var(--color-primary-rgb),0.14);
  color: var(--color-primary-hover);
}

/* ── Health ── */

.health-status-banner {
  padding: 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  margin-bottom: 24px;
}

.health-status-banner.status-ok {
  background: linear-gradient(135deg, var(--color-success-bg), #16372d);
  border: 1px solid var(--color-success-border);
}

.health-status-banner.status-error {
  background: linear-gradient(135deg, var(--color-danger-bg), #3C1B21);
  border: 1px solid var(--color-danger-border);
}

.health-status-icon { font-size: 36px; margin-bottom: 8px; }
.health-status-text { font-size: 20px; font-weight: 600; }

.status-ok .health-status-text { color: var(--color-success-text); }
.status-error .health-status-text { color: var(--color-danger-text); }

.health-status-message {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

.health-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.health-metric-card {
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius);
}

.health-metric-card .metric-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.health-metric-card .metric-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
}

.health-section-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-text);
}

.health-queue-empty {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 12px 0;
}

.health-refresh-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}

.health-refresh-bar label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

.health-refresh-bar input[type="checkbox"] {
  accent-color: var(--color-primary);
}

/* ── Collapsible section ── */

.collapsible-section { border: none; }
.collapsible-section summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  list-style: none;
  font-size: 20px;
  font-weight: 600;
  user-select: none;
}
.collapsible-section summary::-webkit-details-marker { display: none; }
.collapsible-section summary::after {
  content: '›';
  font-size: 18px;
  transition: transform 0.2s;
  color: var(--color-text-secondary);
}
.collapsible-section[open] summary::after {
  transform: rotate(90deg);
}
.collapsible-section .collapsible-content {
  margin-top: 24px;
}

/* ── Responsive ── */

@media (max-width: 480px) {
  .card { padding: 20px; }
  .stat-row { flex-direction: column; gap: 12px; }
  .form-row { flex-direction: column; }
  .info-grid { grid-template-columns: 1fr; }
  .billing-summary-grid { grid-template-columns: 1fr 1fr; }
  .health-metrics { grid-template-columns: 1fr; }
}