styles.css

:root {
  color-scheme: light dark;
  --bg: #fafaf9;
  --surface: #ffffff;
  --surface-subdued: #f8fafc;
  --border: #e5e7eb;
  --text: #0f172a;
  --text-muted: #64748b;
  --accent: #5a31f4;
  --accent-text: #ffffff;
  --success: #047857;
  --success-bg: #ecfdf5;
  --error: #b91c1c;
  --error-bg: #fef2f2;
  --info-bg: #eff6ff;
  --info-text: #1e40af;
  --code-bg: #f1f5f9;
  --shadow-md: 0 1px 3px rgba(15, 23, 42, 0.06), 0 4px 12px rgba(15, 23, 42, 0.04);
  --radius: 8px;
  --gap: 16px;
  --pad: 20px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-subdued: #0f172a;
    --border: #334155;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --success: #34d399;
    --success-bg: #052e1a;
    --error: #fca5a5;
    --error-bg: #450a0a;
    --info-bg: #172554;
    --info-text: #bfdbfe;
    --code-bg: #0b1220;
    --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.4), 0 4px 12px rgba(0, 0, 0, 0.25);
  }
}

html {
  height: 100%;
  overflow: hidden;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-width: 0;
  height: 100%;
  max-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font: inherit;
}

.topbar {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.topbar h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.topbar .subtitle {
  margin: 2px 0 0;
  color: var(--text-muted);
  font-size: 13px;
}

code {
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.08);
  padding: 1px 4px;
  border-radius: 3px;
}

main {
  position: relative;
  width: 100%;
  min-width: 0;
  height: 0;
  display: grid;
  grid-template-columns:
    var(--col-left, minmax(260px, 340px))
    minmax(360px, 1fr)
    var(--col-right, minmax(320px, 560px));
  gap: var(--gap);
  padding: var(--gap);
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
}

main.settings-collapsed {
  grid-template-columns: 64px minmax(360px, 1fr) var(--col-right, minmax(340px, 640px));
}

main.events-collapsed {
  grid-template-columns: var(--col-left, minmax(260px, 340px)) minmax(360px, 1fr) 64px;
}

main.settings-collapsed.events-collapsed {
  grid-template-columns: 64px minmax(360px, 1fr) 64px;
}

.col-resizer {
  position: absolute;
  top: var(--gap);
  bottom: var(--gap);
  width: 10px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: col-resize;
  touch-action: none;
  z-index: 2;
}

.col-resizer::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 36px;
  transform: translate(-50%, -50%);
  border-radius: 999px;
  background: var(--border);
  transition:
    background 0.12s ease,
    height 0.12s ease;
}

.col-resizer:hover::after,
.col-resizer.dragging::after,
.col-resizer:focus-visible::after {
  height: 52px;
  background: var(--accent);
}

.col-resizer:focus-visible {
  outline: none;
}

main.resizing {
  user-select: none;
  cursor: col-resize;
}

.settings-collapsed #resize-left {
  display: none;
}

.events-collapsed #resize-right {
  display: none;
}

@media (max-width: 1180px) {
  main,
  main.settings-collapsed,
  main.events-collapsed,
  main.settings-collapsed.events-collapsed {
    grid-template-columns: 1fr;
  }

  .col-resizer,
  .panel-collapse-toggle {
    display: none;
  }

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

.panel {
  position: relative;
  min-width: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--pad);
  min-height: 0;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.panel-header {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-header h2 {
  margin: 0;
}

.settings-header {
  margin-bottom: 14px;
}

.panel-collapse-toggle {
  position: absolute;
  bottom: 12px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  padding: 0;
  color: var(--text-muted);
  background: var(--surface-subdued);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.panel-collapse-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.panel-collapse-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

#toggle-settings {
  right: 12px;
}

#toggle-events {
  left: 12px;
}

main.settings-collapsed #toggle-settings {
  right: auto;
  left: 50%;
  transform: translateX(-50%);
}

main.events-collapsed #toggle-events {
  left: 50%;
  transform: translateX(-50%);
}

.panel-collapse-toggle svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

#toggle-settings svg {
  transform: scaleX(-1);
}

main.settings-collapsed #toggle-settings svg {
  transform: none;
}

main.events-collapsed #toggle-events svg {
  transform: scaleX(-1);
}

@media (min-width: 1181px) {
  .settings-collapsed .settings-panel,
  .events-collapsed .runtime-panel {
    align-items: center;
    padding: 12px 8px;
  }

  .events-collapsed .runtime-panel {
    overflow: hidden;
  }

  .events-collapsed .runtime-scroll {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    scrollbar-gutter: auto;
    padding-bottom: 0;
  }

  .settings-collapsed .settings-header,
  .events-collapsed .events-header {
    flex: 1;
    flex-direction: column;
    justify-content: flex-start;
    margin: 0;
  }

  .settings-collapsed .settings-header h2,
  .events-collapsed .events-header h2 {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
  }

  .settings-collapsed #options-form,
  .events-collapsed #component-state,
  .events-collapsed #event-log,
  .events-collapsed #event-log:empty + #event-empty,
  .events-collapsed #clear-log {
    display: none;
  }
}

.panel-header p {
  margin: 2px 0 0;
}

.muted {
  color: var(--text-muted);
  font-size: 13px;
}

#options-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

#options-form label,
.manual-card label,
.computed-source {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
}

#options-form label.checkbox {
  flex-direction: row;
  align-items: center;
}

input[type="text"],
input[type="url"],
input[type="number"],
select {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  padding: 8px 10px;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  outline: none;
}

input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}

input[aria-invalid="true"] {
  border-color: var(--error);
  background: color-mix(in srgb, var(--error-bg) 70%, var(--bg));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--error) 14%, transparent);
}

input[type="number"] {
  appearance: textfield;
  -moz-appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  margin: 0;
  appearance: none;
  -webkit-appearance: none;
}

input[readonly] {
  color: var(--text-muted);
  background: var(--surface-subdued);
}

fieldset {
  margin: 0;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

legend {
  padding: 0 6px;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.source-group {
  background: var(--surface-subdued);
}

.source-switcher,
.source-fields {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.radio-card {
  flex-direction: row !important;
  align-items: flex-start;
  gap: 10px !important;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.radio-card:has(input:checked) {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
}

.radio-card span {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.radio-card small,
.field-help {
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.45;
}

.field-help {
  margin: -4px 0 0;
}

button {
  padding: 7px 12px;
  font-size: 13px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition:
    background 0.15s,
    transform 0.05s;
}

button:hover:not(:disabled) {
  background: var(--code-bg);
}

button:active:not(:disabled) {
  transform: translateY(1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.primary-action,
.secondary-action {
  font-weight: 600;
}

.primary-action {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
}

.primary-action:hover:not(:disabled) {
  background: color-mix(in srgb, var(--accent) 88%, black);
}

.secondary-action {
  background: var(--surface);
}

.storefront,
.workspace {
  min-width: 0;
  gap: 14px;
}

.storefront {
  max-height: 100%;
  overflow: hidden;
}

.workspace {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

#build-workspace[data-ready="false"] .cart-banner,
#build-workspace[data-ready="false"] .storefront-header,
#build-workspace[data-ready="false"] .notice,
#build-workspace[data-ready="false"] .product-scroll {
  display: none;
}

#build-workspace[data-ready="false"] .empty-state {
  flex: none;
}

.cart-banner {
  min-width: 0;
  flex: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: color-mix(in srgb, var(--surface) 94%, var(--accent));
  box-shadow: var(--shadow-md);
}

.cart-banner-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.cart-banner h2,
.cart-banner p {
  margin: 0;
}

.pill,
.status-pill {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--success);
  background: var(--success-bg);
}

.status-pill {
  color: var(--info-text);
  background: var(--info-bg);
}

.cart-lines {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--text-muted);
  font-size: 13px;
}

.cart-lines:empty {
  display: none;
}

.cart-line {
  min-width: 0;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) max-content 34px;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: 10px;
  background: var(--surface-subdued);
}

.cart-line-image {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 8px;
  background: var(--code-bg);
  font-size: 20px;
}

.cart-line-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cart-line-details {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cart-line-title,
.cart-line-meta {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cart-line-title {
  color: var(--text);
  font-size: 13px;
}

.cart-line-meta {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.cart-line-controls {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.cart-line-controls .quantity-button {
  width: 30px;
  min-width: 30px;
  height: 30px;
  padding: 0;
  font-size: 13px;
  line-height: 1;
}

.cart-line-summary-quantity {
  width: 52px !important;
  min-width: 52px !important;
  padding: 5px 6px !important;
  text-align: center;
}

.remove-line-button {
  width: 32px;
  min-width: 32px;
  height: 32px;
  padding: 0;
  color: var(--error);
  border-color: color-mix(in srgb, var(--error) 35%, var(--border));
  font-size: 18px;
  line-height: 1;
}

.remove-line-button:hover:not(:disabled) {
  background: var(--error-bg);
}

.computed-source {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
}

.permalink-link {
  min-width: 0;
  display: block;
  padding: 10px 12px;
  overflow-wrap: anywhere;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--accent);
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.45;
  text-decoration: none;
}

.permalink-link:hover[href] {
  border-color: var(--accent);
  text-decoration: underline;
}

.permalink-link[data-empty="true"] {
  color: var(--text-muted);
  font-family: var(--font-sans);
}

.cart-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cart-actions .primary-action,
.manual-card .primary-action {
  width: 100%;
  padding: 11px 16px;
  border-radius: 8px;
}

.notice {
  flex: none;
  margin: 0;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--info-text);
  background: var(--info-bg);
  font-size: 13px;
  line-height: 1.45;
}

.notice[data-tone="success"] {
  color: var(--success);
  background: var(--success-bg);
}

.notice[data-tone="error"] {
  color: var(--error);
  background: var(--error-bg);
}

.empty-state {
  flex: none;
  display: grid;
  place-items: center;
  gap: 8px;
  padding: 44px 24px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  color: var(--text-muted);
  text-align: center;
}

.empty-state div {
  font-size: 42px;
}

.empty-state h3,
.empty-state p {
  margin: 0;
}

.empty-state h3 {
  color: var(--text);
  font-size: 16px;
}

.empty-state p {
  max-width: 520px;
  font-size: 13px;
  line-height: 1.5;
}

.product-scroll {
  min-width: 0;
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  scrollbar-gutter: stable;
  overscroll-behavior: contain;
}

.product-scroll::-webkit-scrollbar {
  width: 10px;
}

.product-scroll::-webkit-scrollbar-thumb {
  border: 2px solid var(--surface);
  border-radius: 999px;
  background: color-mix(in srgb, var(--text-muted) 45%, transparent);
}

.product-grid {
  min-width: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr));
  align-content: start;
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0 4px 4px 0;
}

.product-card {
  min-width: 0;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.product-image {
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 28% 32%, #f9a8d4 0%, transparent 55%),
    radial-gradient(circle at 72% 68%, #a5b4fc 0%, transparent 55%),
    linear-gradient(135deg, #fce7f3 0%, #ede9fe 50%, #dbeafe 100%);
  font-size: 48px;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-info {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 7px;
  padding: 14px;
}

.product-vendor,
.product-title,
.product-meta,
.product-price {
  margin: 0;
}

.product-vendor {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.product-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.25;
}

.product-meta {
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.35;
  word-break: break-word;
}

.product-price {
  margin-top: auto;
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 14px;
}

.product-card-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 6px;
}

.product-card-actions button {
  width: 100%;
}

.unavailable {
  color: var(--error);
  font-size: 13px;
  font-weight: 700;
}

.quantity-controls {
  display: grid;
  grid-template-columns: 36px minmax(58px, 1fr) 36px;
  gap: 6px;
  width: 100%;
}

.quantity-button {
  padding: 8px;
  font-size: 16px;
  font-weight: 700;
}

.cart-line-quantity {
  min-width: 0;
  text-align: center;
}

.manual-checkout {
  justify-content: flex-start;
}

.manual-card {
  width: min(560px, 100%);
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0 auto;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.runtime-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  scrollbar-gutter: stable;
  overscroll-behavior: contain;
  padding-bottom: 48px;
}

.runtime-scroll::-webkit-scrollbar {
  width: 10px;
}

.runtime-scroll::-webkit-scrollbar-thumb {
  border: 2px solid var(--surface);
  border-radius: 999px;
  background: color-mix(in srgb, var(--text-muted) 45%, transparent);
}

#component-state {
  width: 100%;
  flex: none;
  margin-bottom: 16px;
  padding: 10px 12px;
  background: var(--code-bg);
  border-radius: 6px;
}

.events-header {
  margin-top: 0;
}

#component-state summary {
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  list-style: none;
}

#component-state summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  transition: transform 0.15s;
}

#component-state[open] summary::before {
  transform: rotate(90deg);
}

#component-state dl {
  margin: 12px 0 0;
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 6px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
}

#component-state dt {
  color: var(--text-muted);
}

#component-state dd {
  margin: 0;
  word-break: break-word;
  white-space: pre-wrap;
}

#event-log {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

#event-empty {
  display: none;
  overflow-wrap: anywhere;
}

#event-log:empty + #event-empty {
  display: block;
  padding: 12px 0;
}

.event-entry {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  font-size: 12px;
}

.event-entry-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.event-entry-name {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
}

.event-entry-time {
  margin-left: auto;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.event-entry pre {
  margin: 0;
  padding: 8px 10px;
  background: var(--code-bg);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (max-width: 720px) {
  .cart-line {
    grid-template-columns: 44px minmax(0, 1fr) 34px;
  }

  .cart-line-controls {
    grid-column: 2 / -1;
    justify-self: start;
  }
}

@media (max-width: 640px) {
  .cart-banner-header,
  .panel-header {
    align-items: flex-start;
    flex-direction: column;
  }

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