*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-muted: #f7f7f7;
  --border: #e8e8e8;
  --border-strong: #d4d4d4;
  --text: #111111;
  --text-muted: #888888;
  --radius: 6px;
}

body {
  font-family: "DM Sans", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 1080px;
  margin: 0 auto;
  padding: 4rem 2rem 5rem;
}

.header {
  margin-bottom: 3.5rem;
}

.header h1 {
  font-size: 1.125rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.subtitle {
  display: none;
}

.layout {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  align-items: stretch;
}

.editor-banner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
}

.editor-settings {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  width: 100%;
}

.settings-row {
  display: grid;
  gap: 1.75rem 2rem;
  align-items: start;
}

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

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

.settings-row--actions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  padding-top: 0.25rem;
}

.settings-row--bottom .control-group--toggles {
  padding-top: 0;
}

.settings-row--2:has(#animation-speed-group[hidden]),
.settings-row--2:has(#fill-animation-speed-group[hidden]) {
  grid-template-columns: 1fr;
}

.control-group--full {
  width: 100%;
}

.control-group__heading {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.panel {
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  padding: 0;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.control-group label {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

textarea,
select,
input[type="text"] {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font: inherit;
  font-size: 0.9375rem;
  padding: 0.625rem 0.75rem;
  transition: border-color 0.15s;
}

textarea {
  resize: vertical;
  min-height: 72px;
  line-height: 1.6;
}

textarea::placeholder {
  color: #bbbbbb;
}

textarea:focus,
select:focus,
input[type="text"]:focus,
input[type="color"]:focus,
.font-picker__trigger:focus-visible {
  outline: none;
  border-color: var(--border-strong);
}

.font-picker {
  position: relative;
}

.font-picker__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font: inherit;
  font-size: 0.9375rem;
  padding: 0.625rem 0.75rem;
  cursor: pointer;
  transition: border-color 0.15s;
  text-align: left;
}

.font-picker__trigger:hover {
  border-color: var(--border-strong);
}

.font-picker__value {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 1.125rem;
  line-height: 1.2;
}

.font-picker__chevron {
  flex-shrink: 0;
  width: 0.5rem;
  height: 0.5rem;
  border-right: 1.5px solid var(--text-muted);
  border-bottom: 1.5px solid var(--text-muted);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.15s;
}

.font-picker__trigger[aria-expanded="true"] .font-picker__chevron {
  transform: rotate(-135deg) translateY(1px);
}

.font-picker__dropdown {
  position: absolute;
  z-index: 20;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  max-height: 280px;
  overflow-y: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  padding: 0.375rem 0;
}

.font-picker__group + .font-picker__group {
  margin-top: 0.375rem;
  padding-top: 0.375rem;
  border-top: 1px solid var(--border);
}

.font-picker__category {
  padding: 0.375rem 0.75rem 0.25rem;
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.font-picker__option {
  display: block;
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  font-size: 1.0625rem;
  line-height: 1.3;
  transition: background 0.12s;
}

.font-picker__option:hover,
.font-picker__option:focus-visible {
  background: var(--surface-muted);
  outline: none;
}

.font-picker__option.is-selected {
  background: var(--surface-muted);
}

.color-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.control-group--colors .color-secondary-label {
  margin-top: 0.625rem;
}

.field-hint {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.35;
}

.switch-pill:has(.switch-pill__input:disabled) {
  opacity: 0.42;
  cursor: not-allowed;
}

.switch-pill:has(.switch-pill__input:disabled) .switch-pill__track {
  pointer-events: none;
}

input[type="color"] {
  width: 40px;
  height: 40px;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  cursor: pointer;
}

input[type="range"] {
  width: 100%;
  height: 2px;
  accent-color: var(--text);
  cursor: pointer;
}

.range-value {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.btn-primary,
.btn-secondary {
  width: 100%;
  padding: 0.6875rem 1rem;
  border-radius: var(--radius);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s, background 0.15s;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
  border: 1px solid var(--text);
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.82;
}

.btn-secondary {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
  color: var(--text);
  border-color: var(--border-strong);
}

.btn-primary:disabled,
.btn-secondary:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.control-group--toggles {
  padding-top: 0.25rem;
}

.toggles-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
}

.switch-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

.switch-pill__label {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text);
}

.switch-pill__input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.switch-pill__track {
  position: relative;
  flex-shrink: 0;
  width: 40px;
  height: 22px;
  border-radius: 11px;
  background: var(--border);
  transition: background 0.2s ease;
}

.switch-pill__track::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
  transition: transform 0.2s ease;
}

.switch-pill__input:checked + .switch-pill__track {
  background: var(--text);
}

.switch-pill__input:checked + .switch-pill__track::after {
  transform: translateX(18px);
}

.switch-pill__input:focus-visible + .switch-pill__track {
  outline: 2px solid var(--border-strong);
  outline-offset: 2px;
}

.layout .preview {
  min-height: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0 0 1rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}

.preview-header h2 {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.preview-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.layout .preview-canvas {
  --preview-bleed: 2;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem 2rem;
  min-height: 200px;
  max-height: 240px;
  background: var(--surface-muted);
  border-radius: var(--radius);
  margin-top: 1rem;
  overflow: hidden;
}

.preview-placeholder {
  text-align: center;
  color: #cccccc;
}

.preview-placeholder svg {
  display: none;
}

.preview-placeholder p {
  font-size: 0.8125rem;
  letter-spacing: 0.01em;
}

.control-group[hidden] {
  display: none;
}

.layout .preview-canvas svg.output-svg {
  max-width: 100%;
  max-height: 200px;
  width: auto;
  height: auto;
  flex-shrink: 0;
  transform: scale(var(--preview-bleed));
  transform-origin: center center;
}

.preview-canvas .error-message,
.home-preview .error-message {
  color: #cc3333;
  font-size: 0.875rem;
  text-align: center;
  max-width: 320px;
}

/* ── Home page ── */

.view-home {
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  overflow: visible;
}

.home-display {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 480px;
  flex-shrink: 0;
  margin-bottom: 1rem;
}

.home-display__stage {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: visible;
}

.home-loader[hidden],
.home-preview[hidden] {
  display: none !important;
}

.home-form {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  width: calc(100% + 11rem);
  margin-left: calc(-5.5rem);
  margin-top: -2.75rem;
}

.home-form-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
  align-items: stretch;
}

.home-form-actions .btn-primary {
  min-width: 0;
}

.btn-edit {
  visibility: hidden;
  pointer-events: none;
  flex-shrink: 0;
  padding: 0.6875rem 0.875rem;
  border-radius: var(--radius);
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  background: var(--surface-muted);
  color: var(--text-muted);
  border: 1px solid var(--border);
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.btn-edit.is-visible {
  visibility: visible;
  pointer-events: auto;
}

.btn-edit.is-visible:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: #f0f0f0;
}

.home-loader,
.home-preview {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0;
  background: transparent;
}

.home-preview svg.output-svg {
  overflow: visible;
  flex-shrink: 0;
}

/* ── Grid loader (9×9 opacity pulse) ── */

.grid-loader {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 3px;
  width: 117px;
  height: 117px;
}

.grid-loader__cell {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  background: #111;
  opacity: 0;
  animation: grid-cell-pulse 2s ease-in-out infinite;
}

@keyframes grid-cell-pulse {
  0%, 100% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
}

/* ── View navigation ── */

.btn-back {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  text-align: left;
  transition: color 0.15s;
  margin-bottom: 0;
}

.btn-back:hover {
  color: var(--text);
}

.view-home[hidden],
.layout[hidden] {
  display: none !important;
}

@media (max-width: 768px) {
  .app {
    padding: 2.5rem 1.25rem 3rem;
  }

  .settings-row--2,
  .settings-row--3,
  .settings-row--actions {
    grid-template-columns: 1fr;
  }

  .layout .preview-canvas {
    padding: 1rem 1.25rem;
    min-height: 160px;
    max-height: 200px;
  }

  .layout .preview-canvas svg.output-svg {
    max-height: 160px;
    transform: scale(var(--preview-bleed));
  }

  .home-form {
    width: 100%;
    margin-left: 0;
  }
}