:root {
  color-scheme: light;
  --ink: #172739;
  --muted: #627789;
  --panel: rgba(255, 255, 255, 0.92);
  --line: rgba(21, 36, 52, 0.12);
  --accent: #245a8d;
  --accent-dark: #173b5c;
  --surface: #f7fafc;
  --surface-strong: #eef4f8;
  --shadow: 0 22px 54px rgba(17, 27, 39, 0.14);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(36, 90, 141, 0.18), transparent 28%),
    radial-gradient(circle at right bottom, rgba(202, 215, 228, 0.4), transparent 30%),
    linear-gradient(135deg, #edf3f7, #dce7ef 58%, #cfdae4);
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-columns: 400px minmax(0, 1fr);
  min-height: 100vh;
  gap: 20px;
  padding: 20px;
}

.sidebar,
.workspace {
  min-height: 0;
}

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

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

.brand-block,
.panel,
.workspace-header,
.designer-frame-wrap {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.brand-block,
.panel,
.workspace-header {
  padding: 20px;
}

.designer-frame-wrap {
  overflow: hidden;
  flex: 1;
  min-height: 680px;
}

h1,
h2,
h3,
p,
dl {
  margin: 0;
}

h1 {
  margin-top: 6px;
  font-size: 2rem;
  line-height: 1.05;
}

h2 {
  font-size: 1rem;
}

h3 {
  font-size: 0.88rem;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 700;
}

.lede,
.muted,
.config-note,
dt,
.spec-inline-grid span,
.control-field span,
.control-field small {
  color: var(--muted);
}

.lede {
  margin-top: 12px;
  line-height: 1.65;
}

.section-head-row,
.panel-row,
.workspace-header,
.config-title-row,
.spec-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.configurator-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.config-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.config-section:first-of-type {
  padding-top: 0;
  border-top: none;
}

.control-grid {
  display: grid;
  gap: 12px;
}

.control-grid.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.control-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.control-field.wide-field {
  grid-column: span 2;
}

.control-field input,
.control-field select {
  width: 100%;
  min-width: 0;
  border: 1px solid rgba(21, 36, 52, 0.12);
  border-radius: 12px;
  padding: 10px 12px;
  background: white;
  color: var(--ink);
}

.control-field input[readonly] {
  background: var(--surface-strong);
}

.toggle-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.toggle-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-weight: 600;
}

.toggle-pill input {
  margin: 0;
}

.stepper-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.stepper-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.stepper-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stepper-btn,
.ghost-btn,
.spec-badge {
  border: none;
  border-radius: 999px;
  background: rgba(36, 90, 141, 0.08);
  color: var(--accent-dark);
}

.stepper-btn {
  width: 30px;
  height: 30px;
  font-size: 1rem;
}

.ghost-btn {
  padding: 11px 14px;
}

.spec-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  font-size: 0.78rem;
  font-weight: 700;
  border: 1px solid rgba(36, 90, 141, 0.16);
  white-space: nowrap;
}

.share-feedback {
  margin-top: 12px;
  line-height: 1.5;
}

.share-link {
  display: block;
  margin-top: 10px;
  font-size: 0.84rem;
  color: var(--accent-dark);
  word-break: break-all;
}

.spec-panel,
.viewer-spec-banner {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(244, 249, 255, 0.9));
}

.spec-intro {
  margin: 14px 0;
  line-height: 1.55;
}

.state-grid,
.spec-grid,
.spec-inline-grid {
  display: grid;
  gap: 12px;
  margin: 0;
}

.state-grid,
.spec-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.spec-inline-grid {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.state-grid div,
.spec-grid div,
.spec-inline-grid div {
  padding: 12px;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
}

dd,
.spec-inline-grid strong {
  margin-top: 6px;
  font-size: 0.98rem;
  font-weight: 700;
  display: block;
}

.viewer-spec-banner h2,
.spec-panel h2 {
  margin-top: 4px;
}

#designer-frame {
  width: 100%;
  height: 100%;
  min-height: 680px;
  border: 0;
  display: block;
  background: #09131d;
}

.shared-view .app-shell {
  grid-template-columns: minmax(0, 1fr);
}

.shared-view .workspace {
  order: 1;
}

.shared-view .sidebar {
  order: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.shared-view #project-intro,
.shared-view #configurator-panel,
.shared-view #designer-status-panel,
.shared-view #current-state-panel {
  display: none;
}

.shared-view .designer-frame-wrap {
  min-height: 78vh;
}

@media (max-width: 1240px) {
  .app-shell {
    grid-template-columns: 360px minmax(0, 1fr);
  }

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

@media (max-width: 1080px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .designer-frame-wrap,
  #designer-frame {
    min-height: 72vh;
  }

  .shared-view .designer-frame-wrap {
    min-height: 74vh;
  }
}

@media (max-width: 720px) {
  .control-grid.two-col,
  .toggle-grid,
  .state-grid,
  .spec-grid,
  .spec-inline-grid {
    grid-template-columns: 1fr;
  }

  .control-field.wide-field {
    grid-column: auto;
  }

  .section-head-row,
  .panel-row,
  .workspace-header,
  .config-title-row {
    align-items: flex-start;
    flex-direction: column;
  }

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