.billing-panel { max-width: 900px; }
.billing-balance { padding: 1.8rem 0 1.4rem; border-bottom: 1px solid var(--line, #ffffff20); }
.billing-balance > span { display: block; color: var(--muted, #a2adb6); }
.billing-balance strong { display: block; font-size: clamp(2.8rem, 6vw, 4.2rem); font-weight: 600; line-height: 1.2; letter-spacing: -.04em; overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.billing-count-readable { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.billing-balance p, .billing-form p { color: var(--muted, #a2adb6); line-height: 1.7; }
.billing-stats { display: flex; flex-wrap: wrap; gap: 2rem; margin: 1.5rem 0 2rem; }
.billing-stats dt { color: var(--muted, #a2adb6); font-size: .85rem; }
.billing-stats dd { margin: .4rem 0 0; font-variant-numeric: tabular-nums; }
.billing-form { display: grid; gap: .75rem; max-width: 620px; margin-bottom: 2rem; }
.billing-form input:not([type=checkbox]) { width: 100%; min-width: 0; min-height: 44px; }
.billing-form > label:not(:first-child) { margin-top: .5rem; }
.billing-form > button { justify-self: start; }
.billing-amount { display: flex; gap: .75rem; }
.billing-amount input { flex: 1; }
/* Original Specular Button surface and canvas layering. The licensed shader
   and easing live in stream-billing.js; static borders survive GPU failure. */
.billing-form .billing-help { margin: 0; white-space: normal; }
.billing-specular-button {
  position: relative; isolation: isolate; display: inline-flex; align-items: center; justify-content: center;
  flex: 0 0 auto; min-width: 132px; min-height: 46px; padding: 12px 26px; margin: 0;
  border: none; border-radius: 18px; background: transparent; color: #f5f5f5;
  box-shadow: inset 0 1px 0 #ffffff0a, 0 8px 24px #00000040;
  font-family: inherit; font-size: 15px; font-weight: 500; line-height: 1.3; letter-spacing: .01em; white-space: nowrap;
  cursor: pointer; transition: transform .15s ease;
}
.billing-specular-button::before { content: ''; position: absolute; inset: 0; border: 1px solid #424a55; border-radius: inherit; pointer-events: none; }
.billing-specular-ready::before { display: none; }
.billing-specular-fx { position: absolute; inset: -4px; pointer-events: none; z-index: 1; }
.billing-specular-fx canvas { display: block; width: 100%; height: 100%; }
.billing-specular-label { position: relative; z-index: 2; }
.billing-specular-button:focus-visible { outline: 2px solid #b9d7ec; outline-offset: 4px; }
.billing-specular-button:active:not(:disabled) { transform: scale(.97); }
.billing-specular-button:disabled { color: #b8c2cf; cursor: default; box-shadow: inset 0 1px 0 #ffffff0a; }
.billing-specular-button:disabled::before { display: block; border-color: #39434f; }
.billing-specular-button:disabled .billing-specular-fx { visibility: hidden; }
@media (prefers-reduced-motion: reduce) {
  .billing-specular-button { transition: none; }
  .billing-specular-button:active:not(:disabled) { transform: none; }
}
@media (forced-colors: active) {
  .billing-specular-button { background: ButtonFace; color: ButtonText; }
  .billing-specular-button::before { display: block; border-color: ButtonText; }
  .billing-specular-button:disabled { color: GrayText; }
  .billing-specular-button:disabled::before { border-color: GrayText; }
  .billing-specular-fx { display: none; }
}
.billing-toggle { display: flex; align-items: center; gap: .6rem; }
.billing-toggle input { width: 18px; height: 18px; }
#billingOrderStatus:not(:empty) { padding: 1rem 0 2rem; line-height: 2; }
#billingOrderStatus .btn { margin: .4rem .5rem .4rem 0; }
@media (max-width: 560px) { .billing-amount { flex-direction: column; } .billing-form > button { width: 100%; } }

#billingNodes { max-width: none; margin-top: 1.25rem; }
.billing-node-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr)); gap: 16px; }
.billing-node {
  --billing-card-bg: #161e28;
  --billing-load-color: #8cc8ee;
  position: relative; isolation: isolate; display: flex; align-items: flex-start; gap: 12px;
  padding: 22px 18px; min-width: 0; border: 1px solid #384757; border-radius: 14px;
  background: var(--billing-card-bg); color: #edf1f7; cursor: pointer;
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.billing-node:has(input:checked) { --billing-card-bg: #192d3d; border-color: #8cc8ee; box-shadow: inset 0 0 0 1px #8cc8ee30; }
.billing-node:has(input:focus-visible) { outline: 2px solid #8cc8ee; outline-offset: 4px; }
.billing-form .billing-node input[type=radio] { position: relative; z-index: 2; flex: 0 0 18px; width: 18px; height: 18px; min-height: 18px; margin: 3px 0 0; accent-color: #8cc8ee; }
.billing-node-content { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 12px; width: 100%; min-width: 0; }
.billing-node-title { font-size: 17px; font-weight: 600; line-height: 1.35; color: #f2f5fa; overflow-wrap: anywhere; }
.billing-node small { font-size: 13px; line-height: 1.5; color: #b5c4d4; }
.billing-node-footer { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.billing-node .billing-node-selected { visibility: hidden; color: #b7e2ff; font-weight: 600; }
.billing-node:has(input:checked) .billing-node-selected { visibility: visible; }
.billing-node:has(input:disabled) { cursor: not-allowed; border-style: dashed; }

.billing-node-summary { display: grid; align-content: start; gap: 12px; min-width: 0; }
.billing-node-load { align-self: center; }
.billing-node-meter { display: flex; align-items: center; gap: 9px; cursor: help; }
.billing-node-meter-track { position: relative; display: block; flex: 0 0 7px; width: 7px; height: 60px; overflow: hidden; border-radius: 6px; background: color-mix(in srgb, var(--billing-load-color) 13%, transparent); }
.billing-node-meter-track i { position: absolute; inset: 0; border-radius: inherit; background: var(--billing-load-color); transform: scaleY(var(--billing-load, 0)); transform-origin: bottom; transition: transform .5s ease; }
.billing-node-meter-label { display: grid; gap: 6px; color: #b5c4d4; font-size: 12px; line-height: 1.3; }
.billing-node-meter-label strong { min-width: 4ch; color: var(--billing-load-color); font-size: 13px; font-weight: 600; font-variant-numeric: tabular-nums; }
.billing-node-meter--unknown .billing-node-meter-track { background: #64718524; border: 1px dashed #647185; }
.billing-node-meter--unknown .billing-node-meter-label strong { color: #b5c4d4; }
@media (prefers-reduced-motion: reduce) { .billing-node-meter-track i { transition: none; } }
@media (forced-colors: active) {
  .billing-node-meter-track { border: 1px solid ButtonText; background: Canvas; }
  .billing-node-meter-track i { forced-color-adjust: none; background: Highlight; }
  .billing-node-meter-label, .billing-node-meter-label strong { color: CanvasText; }
}


/* Border Glow's mesh edge, conic light mask and cursor geometry adapted for
   native radio cards. Provenance and license: vendor/REACT-BITS-SOURCES.json. */
.billing-node--premium {
  --billing-card-bg: #201e26;
  --billing-load-color: #f1cca0;
  --billing-edge: .28;
  --billing-angle: 315deg;
  --billing-mesh: radial-gradient(at 80% 55%, #e7b57d 0px, transparent 50%),
    radial-gradient(at 15% 15%, #e19cae 0px, transparent 50%),
    radial-gradient(at 70% 90%, #87bbdd 0px, transparent 50%), linear-gradient(#d2b6e9 0 100%);
  border-color: #8d7560;
}
.billing-node--premium:has(input:checked) { --billing-card-bg: #28232c; --billing-edge: .65; border-color: #ebc79b; box-shadow: inset 0 0 0 1px #ebc79b20; }
.billing-node--premium .billing-node-tier, .billing-node--premium .billing-node-selected { color: #f1cca0; }
.billing-form .billing-node--premium input[type=radio] { accent-color: #f1cca0; }
.billing-node--premium::before, .billing-node--premium::after, .billing-node-glow {
  content: ''; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none;
  z-index: 0; transition: opacity .25s ease;
}
.billing-node--premium::before {
  border: 1px solid transparent;
  background: linear-gradient(var(--billing-card-bg) 0 100%) padding-box, var(--billing-mesh) border-box;
  opacity: var(--billing-edge);
  mask-image: conic-gradient(from var(--billing-angle), #000 20%, transparent 35%, transparent 65%, #000 80%);
}
.billing-node--premium::after {
  inset: 0; background: var(--billing-mesh); opacity: calc(var(--billing-edge) * .12);
  mask-image: radial-gradient(ellipse at center, transparent 30%, #000 100%);
}
.billing-node-glow {
  inset: -16px; z-index: 1; opacity: var(--billing-edge);
  mask-image: conic-gradient(from var(--billing-angle), #000 2.5%, transparent 12%, transparent 88%, #000 97.5%);
}
.billing-node-glow::before {
  content: ''; position: absolute; inset: 16px; border-radius: inherit;
  box-shadow: inset 0 0 0 1px #ffe2b8, inset 0 0 6px #ffd29660, inset 0 0 16px #ffd29620,
    0 0 2px #ffd296b0, 0 0 7px #ffd29665, 0 0 18px #ffd29630;
}
.billing-node--premium:has(input:focus-visible) { --billing-edge: .9; }
.billing-node--premium:has(input:disabled) { --billing-edge: 0; }
@media (hover: hover) {
  .billing-node:has(input:enabled):hover { border-color: #7894ad; }
  .billing-node--premium:has(input:enabled):hover { border-color: #ebc79b; }
}
@media (prefers-reduced-motion: reduce) {
  .billing-node, .billing-node::before, .billing-node::after, .billing-node-glow { transition: none; }
  .billing-node--premium { --billing-edge: .28 !important; --billing-angle: 315deg !important; }
  .billing-node--premium:has(input:checked) { --billing-edge: .65 !important; }
  .billing-node--premium:has(input:disabled) { --billing-edge: 0 !important; }
}
@media (forced-colors: active) {
  .billing-node::before, .billing-node::after, .billing-node-glow { display: none; }
  .billing-node:has(input:checked) { outline: 2px solid Highlight; }
}
.billing-form fieldset { display: grid; gap: 12px; border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.billing-form textarea { padding: 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); color: var(--text); }