:root {
  color-scheme: dark;
  --bg: #09101d;
  --panel: rgba(11, 20, 37, 0.84);
  --panel-soft: rgba(255, 255, 255, 0.05);
  --line: rgba(160, 177, 204, 0.18);
  --line-strong: rgba(160, 177, 204, 0.3);
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #f97316;
  --accent-strong: #fb923c;
  --accent-soft: rgba(249, 115, 22, 0.18);
  --success: #22c55e;
  --warn: #f59e0b;
  --danger: #fb7185;
  --shadow: 0 32px 80px rgba(3, 8, 18, 0.42);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: 'Manrope', sans-serif;
  background:
    radial-gradient(circle at top left, rgba(249, 115, 22, 0.22), transparent 28%),
    radial-gradient(circle at top right, rgba(14, 165, 233, 0.18), transparent 24%),
    linear-gradient(180deg, #0b1220 0%, #050914 100%);
  color: var(--text);
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
}

button,
label,
input[type='checkbox'],
input[type='range'] {
  cursor: pointer;
}

.page-shell {
  width: min(1420px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 40px;
}

.hero-panel {
  padding: 16px 8px 28px;
  max-width: 960px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #fdba74;
}

.hero-panel h1,
.panel-header h2,
.section-title-row h3,
.section-subtitle span {
  margin: 0;
  font-family: 'Space Grotesk', sans-serif;
}

.hero-panel h1 {
  font-size: clamp(2.25rem, 3.7vw, 4.5rem);
  line-height: 0.98;
  max-width: 13ch;
}

.hero-copy {
  max-width: 780px;
  margin: 18px 0 0;
  font-size: 1.04rem;
  line-height: 1.7;
  color: rgba(226, 232, 240, 0.84);
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 26px;
}

.hero-point,
.section-card,
.preview-note,
.generated-url-card {
  border: 1px solid var(--line);
  background: var(--panel-soft);
  backdrop-filter: blur(20px);
}

.hero-point {
  border-radius: var(--radius-lg);
  padding: 18px;
}

.hero-point strong,
.switch-card strong,
.field-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 800;
}

.hero-point span,
.section-title-row p,
.field-hint,
.switch-card p,
.preview-footnote,
.preview-note p,
.section-subtitle p,
.toggle-copy small {
  color: var(--muted);
}

.workspace-card {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(390px, 0.92fr);
  gap: 24px;
  align-items: start;
}

.config-panel,
.preview-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.config-panel {
  padding: 24px;
}

.preview-panel {
  position: sticky;
  top: 20px;
  padding: 24px;
}

.panel-header,
.section-title-row,
.action-row,
.range-combo,
.color-field,
.switch-card,
.preset-row,
.font-picks,
.style-options,
.toggle-grid {
  display: flex;
}

.panel-header,
.section-title-row {
  justify-content: space-between;
  align-items: start;
  gap: 16px;
}

.panel-header {
  margin-bottom: 20px;
}

.panel-header h2 {
  font-size: 1.8rem;
}

.panel-header-tools {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.micro-copy {
  display: block;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #fdba74;
  font-size: 0.83rem;
  font-weight: 800;
}

.badge-pill.neutral {
  background: rgba(148, 163, 184, 0.14);
  color: #cbd5e1;
}

.badge-pill.good {
  background: rgba(34, 197, 94, 0.16);
  color: #86efac;
}

.badge-pill.warn {
  background: rgba(245, 158, 11, 0.16);
  color: #fde68a;
}

.section-card {
  padding: 20px;
  border-radius: var(--radius-lg);
}

.config-panel > .section-card + .section-card {
  margin-top: 18px;
}

.section-title-row {
  margin-bottom: 18px;
}

.section-title-row h3 {
  font-size: 1.12rem;
  margin-bottom: 4px;
}

.section-title-row p,
.switch-card p,
.preview-note p,
.preview-footnote,
.field-hint,
.section-subtitle p,
.toggle-copy small {
  margin: 0;
  line-height: 1.55;
}

.section-subtitle {
  margin-top: 18px;
}

.section-subtitle span {
  display: block;
  font-size: 1rem;
  margin-bottom: 4px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.field span:first-child,
.field-label {
  font-size: 0.92rem;
  font-weight: 700;
}

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

input,
select {
  width: 100%;
  min-height: 52px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(9, 17, 32, 0.92);
  color: var(--text);
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease,
    opacity 0.2s ease;
}

input::placeholder {
  color: rgba(148, 163, 184, 0.64);
}

input:focus,
select:focus {
  outline: none;
  border-color: rgba(249, 115, 22, 0.72);
  box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.14);
}

.field.is-invalid input,
.field.is-invalid select {
  border-color: rgba(251, 113, 133, 0.72);
  box-shadow: 0 0 0 4px rgba(251, 113, 133, 0.14);
}

.field.is-disabled {
  opacity: 0.58;
}

.field-hint {
  font-size: 0.84rem;
}

.preset-row,
.font-picks {
  flex-wrap: wrap;
  gap: 10px;
}

.preset-row {
  margin-top: 16px;
}

.preset-chip,
.font-pick,
.primary-button,
.secondary-button,
.ghost-button,
.style-option,
.toggle-card {
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease,
    opacity 0.2s ease;
}

.preset-chip,
.font-pick {
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.preset-chip:hover,
.font-pick:hover,
.primary-button:hover,
.secondary-button:hover,
.style-option:hover,
.toggle-card:hover {
  transform: translateY(-1px);
}

.preset-chip:hover,
.font-pick:hover {
  border-color: rgba(249, 115, 22, 0.45);
  background: rgba(249, 115, 22, 0.12);
}

.dropdown-shell {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  margin: 0;
  padding: 8px;
  list-style: none;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: rgba(4, 8, 16, 0.96);
  box-shadow: 0 22px 44px rgba(2, 6, 12, 0.34);
  max-height: 260px;
  overflow-y: auto;
  z-index: 20;
}

.dropdown-menu[hidden] {
  display: none;
}

.dropdown-item {
  padding: 12px 14px;
  border-radius: 12px;
  cursor: pointer;
  color: var(--text);
}

.dropdown-item:hover,
.dropdown-item[aria-selected='true'] {
  background: rgba(249, 115, 22, 0.14);
}

.range-combo {
  align-items: center;
  gap: 12px;
}

input[type='range'] {
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

input[type='range']::-webkit-slider-runnable-track {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, #f97316 0%, #fb923c 100%);
}

input[type='range']::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  margin-top: -7px;
  border: 2px solid white;
  border-radius: 50%;
  background: #0f172a;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.24);
}

input[type='range']::-moz-range-track {
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, #f97316 0%, #fb923c 100%);
}

input[type='range']::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border: 2px solid white;
  border-radius: 50%;
  background: #0f172a;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.24);
}

.number-input-wrap {
  position: relative;
  width: 110px;
  flex-shrink: 0;
}

.number-input-wrap input {
  padding-right: 40px;
}

.number-input-wrap span {
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 0.9rem;
}

.color-field {
  gap: 10px;
}

.color-field input[type='color'] {
  width: 60px;
  min-width: 60px;
  padding: 6px;
}

.style-options {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}

.style-option {
  flex: 1 1 calc(33.333% - 12px);
  min-height: 92px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02)),
    rgba(255, 255, 255, 0.03);
  color: var(--text);
  text-align: left;
}

.style-option strong,
.toggle-copy strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.96rem;
}

.style-option span {
  display: block;
  color: var(--muted);
  line-height: 1.45;
  font-size: 0.86rem;
}

.style-option.active {
  border-color: rgba(249, 115, 22, 0.65);
  background:
    linear-gradient(180deg, rgba(249, 115, 22, 0.16), rgba(249, 115, 22, 0.08)),
    rgba(255, 255, 255, 0.04);
  box-shadow: 0 20px 32px rgba(249, 115, 22, 0.12);
}

.toggle-grid {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}

.toggle-card {
  position: relative;
  flex: 1 1 calc(33.333% - 12px);
  min-height: 88px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
}

.toggle-card input {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.toggle-card.is-active {
  border-color: rgba(249, 115, 22, 0.62);
  background:
    linear-gradient(180deg, rgba(249, 115, 22, 0.14), rgba(249, 115, 22, 0.07)),
    rgba(255, 255, 255, 0.03);
}

.toggle-card.is-disabled {
  opacity: 0.52;
}

.toggle-copy {
  display: block;
}

.toggle-stack {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.switch-card {
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.04);
}

.switch-card input[type='checkbox'] {
  width: 58px;
  min-width: 58px;
  height: 34px;
  min-height: auto;
  padding: 0;
  appearance: none;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.22);
  position: relative;
}

.switch-card input[type='checkbox']::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: white;
  transition: transform 0.2s ease;
}

.switch-card input[type='checkbox']:checked {
  background: rgba(249, 115, 22, 0.62);
}

.switch-card input[type='checkbox']:checked::after {
  transform: translateX(24px);
}

.collapsible[hidden] {
  display: none;
}

.collapsible {
  padding: 4px 0 2px;
}

.action-row {
  gap: 12px;
  margin-bottom: 16px;
}

.primary-button,
.secondary-button {
  min-height: 52px;
  padding: 0 18px;
  border-radius: 16px;
  font-weight: 800;
}

.primary-button {
  flex: 1;
  background: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
  color: #1c1917;
  box-shadow: 0 18px 30px rgba(249, 115, 22, 0.24);
}

.secondary-button {
  min-width: 148px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.ghost-button {
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 0.84rem;
  font-weight: 700;
}

.ghost-button:hover {
  border-color: rgba(249, 115, 22, 0.45);
  background: rgba(249, 115, 22, 0.1);
  transform: translateY(-1px);
}

.primary-button:disabled,
.secondary-button:disabled,
.ghost-button:disabled {
  cursor: not-allowed;
  opacity: 0.46;
  transform: none;
  box-shadow: none;
}

.generated-url-card,
.preview-note {
  padding: 16px 18px;
  border-radius: var(--radius-lg);
}

.generated-url-card code {
  display: block;
  margin-top: 10px;
  font-size: 0.9rem;
  line-height: 1.65;
  color: #e2e8f0;
  word-break: break-all;
}

.preview-frame-shell {
  border-radius: 24px;
  padding: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.01)),
    rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
}

.preview-stage {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(5, 10, 22, 0.96), rgba(15, 23, 42, 0.94));
  transition:
    background 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease;
}

.preview-stage::after {
  content: attr(data-preview-state);
  position: absolute;
  inset: auto 14px 14px auto;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.72);
  color: #e2e8f0;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: capitalize;
  pointer-events: none;
  opacity: 0;
  transform: translateY(6px);
  transition:
    opacity 0.18s ease,
    transform 0.18s ease;
}

.preview-stage[data-preview-state='loading']::after,
.preview-stage[data-preview-state='error']::after {
  opacity: 1;
  transform: translateY(0);
}

.preview-stage[data-preview-state='loading'] {
  box-shadow: inset 0 0 0 1px rgba(251, 191, 36, 0.18);
}

.preview-stage[data-preview-state='error'] {
  box-shadow: inset 0 0 0 1px rgba(251, 113, 133, 0.24);
}

.preview-stage.is-transparent {
  background-size: 28px 28px;
}

.preview-stage.is-transparent[data-board-tone='dark'] {
  background:
    conic-gradient(
      from 90deg,
      rgba(19, 31, 52, 0.96) 0deg 90deg,
      rgba(11, 20, 37, 0.96) 90deg 180deg,
      rgba(19, 31, 52, 0.96) 180deg 270deg,
      rgba(11, 20, 37, 0.96) 270deg 360deg
    );
  background-size: 28px 28px;
}

.preview-stage.is-transparent[data-board-tone='light'] {
  background:
    conic-gradient(
      from 90deg,
      rgba(255, 255, 255, 0.94) 0deg 90deg,
      rgba(231, 236, 243, 0.94) 90deg 180deg,
      rgba(255, 255, 255, 0.94) 180deg 270deg,
      rgba(231, 236, 243, 0.94) 270deg 360deg
    );
  background-size: 28px 28px;
}

#preview-frame {
  width: 100%;
  height: 100%;
  border: 0;
  background: transparent;
}

.preview-note {
  margin-top: 18px;
}

.preview-note p + p {
  margin-top: 10px;
}

@media (max-width: 1120px) {
  .workspace-card {
    grid-template-columns: 1fr;
  }

  .preview-panel {
    position: static;
  }

  .style-option,
  .toggle-card {
    flex-basis: calc(50% - 12px);
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(100% - 20px, 100%);
    padding-top: 18px;
  }

  .hero-panel {
    padding-inline: 2px;
  }

  .hero-points,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .field-span-2 {
    grid-column: span 1;
  }

  .config-panel,
  .preview-panel {
    padding: 18px;
  }

  .action-row {
    flex-direction: column;
  }

  .secondary-button {
    width: 100%;
  }

  .range-combo,
  .color-field,
  .switch-card,
  .panel-header,
  .section-title-row,
  .panel-header-tools {
    flex-direction: column;
    align-items: stretch;
  }

  .number-input-wrap {
    width: 100%;
  }

  .style-option,
  .toggle-card {
    flex-basis: 100%;
  }
}