:root {
  color-scheme: dark;
  --bg: #050607;
  --panel: #0d1011;
  --panel-strong: #111719;
  --panel-soft: #151918;
  --line: rgba(209, 255, 236, 0.13);
  --line-strong: rgba(134, 255, 218, 0.34);
  --text: #eef7f2;
  --muted: #8b9a93;
  --soft: #bdc9c3;
  --accent: #48f0b4;
  --accent-2: #7cc7ff;
  --warning: #f2b84b;
  --success: #48f0b4;
  --danger: #ff6b6b;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 8%, rgba(72, 240, 180, 0.12), transparent 28%),
    radial-gradient(circle at 82% 18%, rgba(124, 199, 255, 0.12), transparent 26%),
    linear-gradient(135deg, #050607 0%, #080b0b 48%, #040505 100%);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.72), transparent 82%);
}

button,
input,
select {
  font: inherit;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  margin-top: 4px;
  font-size: 30px;
  line-height: 1.18;
}

h2 {
  margin-top: 4px;
  font-size: 20px;
  line-height: 1.25;
}

.eyebrow {
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.subtitle,
.small,
.hint {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.form-error {
  min-height: 20px;
  margin: 0;
  color: #ff6b7a;
  font-size: 13px;
  line-height: 1.5;
}

.form-error.success {
  color: var(--accent);
}

.login-screen {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(320px, 440px) minmax(320px, 540px);
  align-items: center;
  justify-content: center;
  gap: clamp(22px, 5vw, 72px);
  padding: clamp(20px, 5vw, 64px);
}

.login-card,
.signal-panel,
.panel,
.metric-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(17, 23, 25, 0.96), rgba(10, 13, 14, 0.96));
  box-shadow: var(--shadow);
}

.login-card {
  padding: clamp(22px, 4vw, 34px);
}

.login-brand,
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(72, 240, 180, 0.1);
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
  box-shadow: 0 0 24px rgba(72, 240, 180, 0.12);
}

.login-copy {
  margin: 18px 0 22px;
  color: var(--soft);
  line-height: 1.65;
}

.stack-form,
.auth-form,
.subscription-form {
  display: grid;
  gap: 10px;
}

.stack-form label,
.auth-form label,
.subscription-form label,
.pay-form label,
.quota-consume label,
.refund-box label {
  color: var(--soft);
  font-size: 13px;
  font-weight: 800;
}

input,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text);
  padding: 11px 12px;
}

select option {
  background: #0d1011;
  color: var(--text);
}

input:focus,
select:focus,
button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(72, 240, 180, 0.22);
  outline-offset: 2px;
}

button,
.nav-link {
  min-height: 42px;
  border: 1px solid rgba(72, 240, 180, 0.36);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(72, 240, 180, 0.95), rgba(42, 174, 130, 0.95));
  color: #03120d;
  cursor: pointer;
  font-weight: 850;
  padding: 10px 14px;
  text-decoration: none;
  white-space: nowrap;
}

button:hover,
.nav-link:hover {
  filter: brightness(1.06);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

button.secondary,
.nav-link {
  background: rgba(255, 255, 255, 0.035);
  border-color: var(--line);
  color: var(--text);
}

button.secondary:hover,
.nav-link:hover {
  background: rgba(255, 255, 255, 0.07);
}

button.slim {
  min-height: 36px;
  padding: 7px 11px;
  font-size: 13px;
}

.register-box {
  margin-top: 18px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.register-box summary {
  color: var(--accent-2);
  cursor: pointer;
  font-weight: 850;
}

.register-box .stack-form {
  margin-top: 14px;
}

.login-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}

.signal-panel {
  min-height: 420px;
  display: grid;
  align-content: end;
  gap: 18px;
  padding: clamp(22px, 4vw, 34px);
  background:
    linear-gradient(180deg, rgba(124, 199, 255, 0.08), rgba(72, 240, 180, 0.06)),
    linear-gradient(180deg, rgba(17, 23, 25, 0.92), rgba(7, 9, 10, 0.96));
}

.signal-grid {
  display: grid;
  gap: 10px;
}

.signal-grid div {
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.18);
  padding: 14px;
}

.signal-grid strong {
  color: var(--text);
}

.signal-grid span {
  color: var(--muted);
  font-size: 13px;
}

.status-pill {
  min-width: 96px;
  display: inline-flex;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 12px;
  color: var(--muted);
  font-size: 13px;
}

.status-pill.ok {
  border-color: rgba(72, 240, 180, 0.38);
  color: var(--success);
}

.status-pill.warn {
  border-color: rgba(242, 184, 75, 0.45);
  color: var(--warning);
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 18px;
  border-right: 1px solid var(--line);
  background: rgba(7, 9, 10, 0.86);
  backdrop-filter: blur(18px);
  padding: 20px;
}

.sidebar-brand strong,
.sidebar-footer span {
  display: block;
  color: var(--text);
  overflow-wrap: anywhere;
}

.sidebar-brand span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.side-nav {
  display: grid;
  align-content: start;
  gap: 8px;
}

.nav-item {
  width: 100%;
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  border-color: transparent;
  background: transparent;
  color: var(--soft);
  text-align: left;
}

.nav-item:hover,
.nav-item.active {
  border-color: var(--line-strong);
  background: rgba(72, 240, 180, 0.1);
  color: var(--text);
}

.sidebar-footer {
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.workspace {
  min-width: 0;
  padding: 24px clamp(18px, 3vw, 34px) 40px;
}

.workspace-head,
.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.topbar {
  padding: 32px clamp(20px, 5vw, 56px) 20px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.view {
  display: none;
}

.view.active {
  display: grid;
  gap: 18px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.metric-card {
  min-height: 132px;
  display: grid;
  align-content: space-between;
  gap: 10px;
  padding: 18px;
}

.metric-card p {
  color: var(--muted);
  font-size: 13px;
}

.metric-card strong {
  color: var(--accent);
  font-size: 24px;
  line-height: 1.15;
}

.metric-card span {
  color: var(--soft);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.panel {
  padding: 20px;
}

.split-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.button-row,
.quota-actions,
.subscription-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.button-row.compact {
  min-width: min(360px, 100%);
}

.session-box,
.quota-result,
.quota-payment,
.empty-block,
.ai-status,
.subscription-status {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  padding: 14px;
  color: var(--muted);
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.session-box {
  display: grid;
  gap: 4px;
}

.session-box strong,
.quota-payment strong,
.ai-status strong,
.subscription-status strong {
  color: var(--text);
}

.session-box.active {
  border-style: solid;
  border-color: rgba(72, 240, 180, 0.35);
  background: rgba(72, 240, 180, 0.075);
}

.product-list,
.sku-list,
.plan-list {
  display: grid;
  gap: 10px;
}

.choice-option,
.product-option,
.sku-option,
.plan-option {
  display: grid;
  grid-template-columns: 20px 1fr auto;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.025);
  padding: 14px;
  cursor: pointer;
}

.choice-option:has(input:checked),
.product-option:has(input:checked),
.sku-option:has(input:checked),
.plan-option:has(input:checked) {
  border-color: var(--line-strong);
  background: rgba(72, 240, 180, 0.08);
}

.choice-name,
.product-name {
  display: block;
  color: var(--text);
  font-weight: 850;
}

.choice-desc,
.product-desc,
.plan-option span span {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.choice-price,
.product-price {
  color: var(--accent-2);
  font-weight: 900;
}

.pay-form,
.quota-consume,
.refund-box {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.quota-consume,
.refund-box,
.ai-detail-grid,
.ai-qr-box,
.qr-box {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.amount-row {
  display: grid;
  grid-template-columns: minmax(140px, 0.8fr) minmax(120px, 1fr) auto;
  gap: 10px;
}

.inline-form,
.refund-row {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) auto;
  gap: 10px;
}

.quota-result,
.quota-payment {
  margin-top: 14px;
}

.quota-payment,
.ai-qr-box,
.qr-box {
  display: grid;
  gap: 8px;
  justify-items: start;
}

.quota-payment[hidden],
.ai-qr-box[hidden],
.qr-box[hidden],
[hidden] {
  display: none !important;
}

.quota-payment a,
.ai-detail-grid a,
.qr-box a {
  color: var(--accent);
  font-weight: 850;
}

.result-box {
  margin-top: 18px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.ai-status {
  min-height: 96px;
  display: grid;
  align-content: center;
  gap: 5px;
}

.ai-actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.ai-qr-box,
.qr-box {
  color: var(--muted);
  font-size: 13px;
}

.ai-qr-box img,
.qr-box img {
  width: 156px;
  height: 156px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

dl {
  display: grid;
  gap: 8px;
  margin: 10px 0 14px;
}

dl div {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 10px;
}

dt {
  color: var(--muted);
}

dd {
  margin: 0;
  overflow-wrap: anywhere;
  font-weight: 700;
}

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

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 12px 10px;
  color: var(--soft);
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}

th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

tbody tr {
  cursor: default;
}

tbody tr:hover {
  background: rgba(255, 255, 255, 0.025);
}

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

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 900;
}

.badge.paid {
  background: rgba(72, 240, 180, 0.13);
  color: var(--success);
}

.badge.pending {
  background: rgba(242, 184, 75, 0.13);
  color: var(--warning);
}

.badge.failed {
  background: rgba(255, 107, 107, 0.13);
  color: var(--danger);
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 50;
  max-width: min(420px, calc(100vw - 40px));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(8, 11, 12, 0.96);
  box-shadow: var(--shadow);
  padding: 12px 14px;
  color: var(--text);
}

.subscription-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(380px, 1.15fr);
  gap: 20px;
  padding: 0 clamp(20px, 5vw, 56px) 40px;
}

.subscription-records {
  grid-column: 1 / -1;
}

.plan-option {
  grid-template-columns: 20px 1fr;
}

.plan-option.info {
  grid-template-columns: 1fr;
  cursor: default;
}

.subscription-status {
  min-height: 150px;
  display: grid;
  align-content: center;
  gap: 6px;
}

.subscription-status strong {
  font-size: 22px;
}

.topbar {
  margin-bottom: 0;
}

@media (max-width: 1040px) {
  .app-shell,
  .login-screen {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar {
    position: static;
    height: auto;
    grid-template-rows: auto auto auto;
  }

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

  .metric-grid,
  .subscription-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .signal-panel {
    min-height: auto;
  }
}

@media (max-width: 680px) {
  h1 {
    font-size: 24px;
  }

  .workspace {
    padding: 18px 14px 30px;
  }

  .workspace-head,
  .topbar,
  .section-head {
    display: grid;
    align-items: start;
  }

  .side-nav,
  .metric-grid,
  .amount-row,
  .inline-form,
  .refund-row,
  .button-row,
  .quota-actions,
  .ai-actions,
  .subscription-actions {
    grid-template-columns: 1fr;
  }

  .choice-option,
  .product-option,
  .sku-option {
    grid-template-columns: 20px minmax(0, 1fr);
  }

  .choice-price,
  .product-price {
    grid-column: 2;
  }

  dl div {
    grid-template-columns: 1fr;
    gap: 3px;
  }
}
.paypal-checkout { margin: 16px 0; }
.paypal-checkout img { display: block; width: 240px; max-width: 100%; height: auto; aspect-ratio: 1; background: #fff; }
.paypal-checkout p { margin: 8px 0; }
.crypto-actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
#cryptoInvoice dd { overflow-wrap: anywhere; }
#cryptoQR { width: 256px; max-width: 100%; height: auto; aspect-ratio: 1; background: white; }
#cryptoDemo { color: #ffd166; }
#cryptoHistory tr { cursor: pointer; }