:root {
  --ink: #241b38;
  --muted: #746c83;
  --paper: #fffdf9;
  --canvas: #f7f3fb;
  --line: #e8e0ef;
  --purple: #6d3ce8;
  --purple-dark: #4e27b8;
  --pink: #db2777;
  --shadow: 0 24px 70px rgba(71, 45, 100, 0.12);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0.55)),
    radial-gradient(circle at 12% 12%, #eadcff 0, transparent 30%),
    radial-gradient(circle at 88% 24%, #ffe0ed 0, transparent 28%),
    var(--canvas);
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

button,
a,
input,
select {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(109, 60, 232, 0.28);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  color: white;
  background: var(--purple-dark);
  border-radius: 10px;
  font-size: 13px;
  font-weight: 750;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.ambient {
  position: fixed;
  z-index: -1;
  width: 360px;
  height: 360px;
  border: 1px solid rgba(109, 60, 232, 0.11);
  border-radius: 46% 54% 62% 38%;
  pointer-events: none;
}

.ambient-one {
  top: 110px;
  left: -220px;
  transform: rotate(22deg);
}

.ambient-two {
  right: -260px;
  bottom: 60px;
  transform: rotate(-18deg);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0;
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  color: white;
  background: linear-gradient(135deg, var(--purple), #b34fd4);
  border-radius: 11px 11px 15px 11px;
  box-shadow: 0 8px 20px rgba(109, 60, 232, 0.25);
  place-items: center;
  font-family: Georgia, serif;
  font-size: 22px;
  font-style: italic;
}

.brand-tag {
  padding: 3px 8px;
  color: var(--purple-dark);
  background: #eee7ff;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.quiet-link {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  transition: color 160ms ease;
}

.quiet-link:hover {
  color: var(--purple);
}

main {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.intro {
  position: relative;
  max-width: 780px;
  margin: 68px auto 56px;
  text-align: center;
}

.intro > :not(.hero-sparkles) {
  position: relative;
  z-index: 1;
}

.hero-sparkles {
  position: absolute;
  inset: -30px -52px auto;
  z-index: 0;
  height: 215px;
  color: var(--purple);
  pointer-events: none;
}

.sparkle {
  position: absolute;
  display: block;
  opacity: 0.26;
  filter: drop-shadow(0 4px 9px rgba(109, 60, 232, 0.17));
  animation: cutie-twinkle 4.8s ease-in-out infinite;
  transform-origin: center;
}

.sparkle-one {
  top: 8px;
  left: 7%;
  font-size: 25px;
}

.sparkle-two {
  top: 92px;
  right: 1%;
  color: var(--pink);
  font-size: 20px;
  animation-delay: -1.7s;
}

.sparkle-three {
  top: 2px;
  right: 18%;
  font-size: 13px;
  animation-delay: -3.1s;
}

@keyframes cutie-twinkle {
  0%,
  100% {
    opacity: 0.22;
    transform: translateY(2px) rotate(-8deg) scale(0.82);
  }

  48% {
    opacity: 0.85;
    transform: translateY(-3px) rotate(8deg) scale(1.12);
  }
}

.eyebrow,
.step-label {
  margin: 0 0 10px;
  color: var(--purple);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  gap: 9px;
  align-items: center;
  justify-content: center;
}

.eyebrow span {
  width: 20px;
  height: 1px;
  background: currentColor;
}

.intro h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 76px);
  font-weight: 780;
  letter-spacing: -0.065em;
  line-height: 0.98;
}

.intro h1 em {
  color: var(--purple);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 500;
}

.name-story {
  margin: 19px auto 0;
  color: #655a73;
  font-size: 13px;
  font-weight: 650;
}

.name-equation {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 5px;
  align-items: baseline;
  justify-content: center;
  padding: 7px 12px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(109, 60, 232, 0.1);
  border-radius: 999px;
}

.name-part strong,
.name-accent,
.name-result {
  color: var(--purple-dark);
  font-weight: 850;
}

.name-accent,
.name-result {
  font-family: Georgia, "Times New Roman", serif;
  font-style: italic;
}

.name-muted {
  color: #9a91a6;
  font-weight: 500;
}

.name-operator {
  color: #baafc7;
  font-weight: 550;
}

.lede {
  max-width: 620px;
  margin: 28px auto 18px;
  color: var(--muted);
  font-size: 17px;
}

.privacy-note {
  display: inline-block;
  padding: 7px 12px;
  color: #5b5269;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(83, 66, 105, 0.1);
  border-radius: 14px;
  font-size: 11px;
  font-weight: 650;
  text-align: left;
  backdrop-filter: blur(8px);
}

.privacy-note summary {
  display: flex;
  gap: 8px;
  align-items: center;
  cursor: pointer;
  list-style: none;
}

.privacy-note summary::-webkit-details-marker {
  display: none;
}

.privacy-note summary::after {
  margin-left: 2px;
  color: var(--purple);
  content: "+";
  font-size: 14px;
}

.privacy-note[open] summary::after {
  content: "−";
}

.privacy-note p {
  max-width: 510px;
  margin: 9px 2px 3px 15px;
  color: var(--muted);
  font-weight: 500;
  line-height: 1.55;
}

.privacy-dot {
  width: 7px;
  height: 7px;
  background: #18a66f;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(24, 166, 111, 0.12);
}

.studio {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  grid-template-areas:
    "upload preview"
    "palette preview"
    "options preview"
    "advanced preview";
  gap: 22px;
  align-items: start;
}

.controls-column {
  display: contents;
}

.upload-panel {
  grid-area: upload;
}

.palette-panel {
  grid-area: palette;
}

.options-panel {
  grid-area: options;
}

.advanced-panel {
  grid-area: advanced;
}

.panel,
.preview-column {
  background: rgba(255, 253, 249, 0.92);
  border: 1px solid rgba(117, 90, 145, 0.13);
  border-radius: var(--radius);
  box-shadow: 0 8px 30px rgba(58, 36, 79, 0.05);
  backdrop-filter: blur(14px);
}

.panel {
  padding: 24px;
}

.panel-heading,
.preview-header {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.panel-heading.compact {
  margin-bottom: 18px;
}

.panel-heading h2,
.preview-header h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.035em;
}

.text-button,
.icon-button {
  color: var(--purple);
  background: none;
  border: 0;
  cursor: pointer;
}

.text-button {
  min-height: 40px;
  padding: 8px;
  font-size: 13px;
  font-weight: 780;
}

.text-button:hover {
  color: var(--pink);
}

.text-button:disabled,
.summary-button:disabled,
.icon-button:disabled,
.preset:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.drop-zone {
  display: grid;
  width: 100%;
  min-height: 176px;
  padding: 25px;
  color: var(--muted);
  background:
    linear-gradient(var(--paper), var(--paper)) padding-box,
    repeating-linear-gradient(90deg, #cfc1df 0 8px, transparent 8px 14px) border-box;
  border: 1px solid transparent;
  border-radius: 16px;
  cursor: pointer;
  transition:
    transform 160ms ease,
    background-color 160ms ease,
    box-shadow 160ms ease;
  place-items: center;
  align-content: center;
}

.drop-zone:hover,
.drop-zone.dragging {
  color: var(--purple);
  background:
    linear-gradient(#fbf8ff, #fbf8ff) padding-box,
    repeating-linear-gradient(90deg, var(--purple) 0 8px, transparent 8px 14px)
      border-box;
  box-shadow: inset 0 0 0 4px rgba(109, 60, 232, 0.04);
  transform: translateY(-1px);
}

.drop-zone strong {
  margin-top: 12px;
  color: var(--ink);
  font-size: 15px;
}

.drop-zone > span:last-child {
  margin-top: 3px;
  font-size: 13px;
}

.upload-help {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.upload-orbit {
  display: grid;
  width: 50px;
  height: 50px;
  background: #f0eaff;
  border-radius: 50%;
  place-items: center;
}

.upload-arrow {
  color: var(--purple);
  font-size: 24px;
  font-weight: 400;
  transform: translateY(-1px);
}

.file-summary {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 13px;
  background: #f8f5fb;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.file-icon {
  display: grid;
  width: 38px;
  height: 42px;
  color: white;
  background: var(--purple);
  border-radius: 7px 7px 10px 7px;
  place-items: center;
  font-size: 10px;
  font-weight: 850;
}

.file-copy {
  display: grid;
  min-width: 0;
  flex: 1;
}

.file-copy strong {
  overflow: hidden;
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-copy span {
  color: var(--muted);
  font-size: 12px;
}

.file-copy .styled-note {
  width: fit-content;
  margin-top: 5px;
  padding: 3px 7px;
  color: #176646;
  background: #e8f8f0;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 760;
}

.summary-button {
  min-height: 40px;
  padding: 7px 10px;
  color: var(--purple-dark);
  background: white;
  border: 1px solid var(--line);
  border-radius: 9px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 750;
}

.summary-button:hover {
  background: #f3edff;
  border-color: #cbbcf2;
}

.icon-button {
  width: 40px;
  height: 40px;
  padding: 0;
  color: var(--muted);
  border-radius: 50%;
  font-size: 22px;
  line-height: 1;
}

.icon-button:hover {
  color: #b42351;
  background: #ffeaf0;
}

.inline-error {
  margin: 10px 0 0;
  padding: 9px 11px;
  color: #a61b45;
  background: #fff0f4;
  border-radius: 9px;
  font-size: 13px;
}

.presets {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 20px;
}

.preset {
  display: flex;
  gap: 7px;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 44px;
  padding: 8px 6px;
  color: var(--muted);
  background: white;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 720;
}

.preset:hover,
.preset.active {
  color: var(--purple-dark);
  background: #f7f3ff;
  border-color: #cbbcf2;
}

.preset-dots {
  width: 24px;
  height: 10px;
  border-radius: 10px;
}

.cutie-dots {
  background: linear-gradient(90deg, #6d28d9 0 33%, #be185d 33% 66%, #be123c 66%);
}

.berry-dots {
  background: linear-gradient(90deg, #4c1d95 0 33%, #86198f 33% 66%, #c2415d 66%);
}

.ocean-dots {
  background: linear-gradient(90deg, #164e63 0 33%, #0369a1 33% 66%, #047857 66%);
}

.earth-dots {
  background: linear-gradient(90deg, #713f12 0 33%, #92400e 33% 66%, #166534 66%);
}

.safe-dots {
  background: linear-gradient(90deg, #000 0 33%, #0072b2 33% 66%, #b0004b 66%);
}

.color-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9px 12px;
}

.color-control {
  display: grid;
  grid-template-columns: 28px 42px minmax(76px, 1fr) 34px;
  gap: 7px;
  align-items: center;
  min-width: 0;
  padding: 7px;
  background: #faf8fc;
  border: 1px solid #eee7f3;
  border-radius: 10px;
}

.heading-code {
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  font-weight: 800;
}

.color-swatch {
  width: 40px;
  height: 40px;
  padding: 0;
  overflow: hidden;
  background: none;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
}

.color-swatch::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-swatch::-webkit-color-swatch,
.color-swatch::-moz-color-swatch {
  border: 0;
  border-radius: 8px;
}

.color-value {
  min-width: 0;
  min-height: 38px;
  padding: 7px;
  color: #5c5369;
  background: white;
  border: 1px solid transparent;
  border-radius: 7px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  text-transform: uppercase;
}

.color-value:hover,
.color-value:focus {
  border-color: #d7cce1;
}

.color-value[aria-invalid="true"] {
  color: #a61b45;
  background: #fff0f4;
  border-color: #ef9cb4;
}

.contrast-badge {
  padding: 3px 4px;
  color: #176646;
  background: #e8f8f0;
  border-radius: 6px;
  font-size: 9px;
  font-weight: 850;
  text-align: center;
}

.contrast-badge.warning {
  color: #9b3d15;
  background: #fff0e7;
}

.contrast-summary {
  margin: 12px 2px 0;
  color: #39705b;
  font-size: 12px;
}

.contrast-summary.warning {
  color: #9b3d15;
}

.switch {
  position: relative;
  cursor: pointer;
}

.switch input {
  position: absolute;
  opacity: 0;
}

.switch-track {
  display: block;
  width: 44px;
  height: 24px;
  padding: 3px;
  background: #d9d2df;
  border-radius: 999px;
  transition: background 160ms ease;
}

.switch-track span {
  display: block;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(48, 33, 66, 0.18);
  transition: transform 160ms ease;
}

.switch input:checked + .switch-track {
  background: var(--purple);
}

.switch input:checked + .switch-track span {
  transform: translateX(20px);
}

.switch input:focus-visible + .switch-track {
  outline: 3px solid rgba(109, 60, 232, 0.28);
  outline-offset: 3px;
}

.field-label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
}

.text-input {
  width: 100%;
  min-height: 44px;
  padding: 11px 12px;
  color: var(--ink);
  background: #faf8fc;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.text-input[aria-invalid="true"] {
  background: #fff0f4;
  border-color: #ef9cb4;
}

.text-input:disabled {
  color: #aaa2b4;
  cursor: not-allowed;
}

.disclosure-button {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 11px;
  color: var(--purple-dark);
  background: #f4efff;
  border: 1px solid #d8ccf6;
  border-radius: 10px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 780;
  text-align: left;
}

.disclosure-button:hover:not(:disabled) {
  background: #ebe1ff;
  border-color: #c5b3ef;
}

.disclosure-button:disabled {
  color: #9d95a6;
  background: #f6f3f7;
  border-color: var(--line);
  cursor: not-allowed;
}

.disclosure-chevron {
  font-size: 16px;
  transition: transform 160ms ease;
}

.disclosure-button[aria-expanded="true"] .disclosure-chevron {
  transform: rotate(180deg);
}

.heading-editor-body {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.heading-editor-body[inert] {
  opacity: 0.62;
}

.heading-editor-intro {
  margin: 0 0 15px;
  color: var(--muted);
  font-size: 12px;
}

.heading-editor-toolbar {
  display: flex;
  gap: 8px 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.heading-search {
  width: 100%;
}

.heading-search input {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  color: var(--ink);
  background: #faf8fc;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.heading-edit-count {
  flex: 1;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.heading-editor-list {
  display: grid;
  gap: 7px;
  max-height: 520px;
  margin: 0;
  padding: 0 4px 0 0;
  overflow: auto;
  list-style: none;
}

.heading-editor-row {
  display: grid;
  grid-template-columns: 30px 66px minmax(0, 1fr) 44px;
  gap: 7px;
  align-items: center;
  padding: 6px;
  background: #faf8fc;
  border: 1px solid #eee7f3;
  border-radius: 11px;
}

.heading-editor-row.edited {
  background: #f7f3ff;
  border-color: #cbbcf2;
}

.heading-editor-row.invalid {
  background: #fff0f4;
  border-color: #ef9cb4;
}

.heading-order {
  color: #9a91a5;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 10px;
  font-weight: 750;
  text-align: center;
}

.heading-level-select,
.heading-title-input {
  min-width: 0;
  min-height: 44px;
  color: var(--ink);
  background: white;
  border: 1px solid #ddd4e5;
  border-radius: 8px;
}

.heading-level-select {
  padding: 9px 8px;
  cursor: pointer;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  font-weight: 800;
}

.heading-title-input {
  width: 100%;
  padding: 9px 10px;
  font-size: 13px;
}

.heading-title-input[aria-invalid="true"] {
  border-color: #d32955;
  box-shadow: 0 0 0 2px rgba(211, 41, 85, 0.1);
}

.heading-reset {
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--purple-dark);
  background: white;
  border: 1px solid #d8ccf6;
  border-radius: 9px;
  cursor: pointer;
  font-size: 18px;
}

.heading-reset:hover {
  background: #ebe1ff;
}

.heading-editor-empty {
  margin: 12px 0 0;
  padding: 14px;
  color: var(--muted);
  background: #faf8fc;
  border-radius: 10px;
  font-size: 12px;
  text-align: center;
}

.show-more-button {
  width: 100%;
  min-height: 44px;
  margin-top: 9px;
  color: var(--purple-dark);
  background: #f7f3ff;
  border: 1px solid #d8ccf6;
  border-radius: 9px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 760;
}

.show-more-button:hover {
  background: #ebe1ff;
}

.preview-column {
  position: sticky;
  top: 18px;
  grid-area: preview;
  padding: 26px;
  box-shadow: var(--shadow);
}

.runtime-status {
  display: flex;
  gap: 7px;
  align-items: center;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.runtime-status .runtime-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  background: #968da1;
  border-radius: 50%;
}

.runtime-status[data-mode="ready"] .runtime-dot {
  background: #16845c;
}

.runtime-status[data-mode="loading"] .runtime-dot {
  background: #e49b20;
  animation: pulse 1s infinite alternate;
}

.runtime-status[data-mode="error"] .runtime-dot {
  background: #d32955;
}

.preview-safety {
  margin: -10px 0 14px;
  color: var(--muted);
  font-size: 12px;
}

@keyframes pulse {
  to {
    opacity: 0.35;
  }
}

.notebook-shell {
  overflow: hidden;
  background: #f7f5f8;
  border: 1px solid #dcd5e1;
  border-radius: 15px;
  box-shadow: 0 12px 30px rgba(48, 34, 65, 0.09);
}

.notebook-toolbar {
  display: flex;
  gap: 6px;
  align-items: center;
  height: 38px;
  padding: 0 13px;
  background: #ece8ef;
  border-bottom: 1px solid #dcd5e1;
}

.notebook-toolbar > span {
  width: 8px;
  height: 8px;
  background: #c9c2ce;
  border-radius: 50%;
}

.notebook-toolbar > span:first-child {
  background: #ee8d9c;
}

.notebook-toolbar > span:nth-child(2) {
  background: #e8bd6b;
}

.notebook-toolbar > span:nth-child(3) {
  background: #79c99e;
}

.notebook-tab {
  margin-left: 8px;
  overflow: hidden;
  color: #746c7c;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.notebook-page {
  min-height: 478px;
  max-height: 600px;
  padding: 38px 42px;
  overflow: auto;
  background:
    linear-gradient(90deg, #f2eef5 1px, transparent 1px) 22px 0 / 24px 100%,
    white;
}

.empty-preview {
  display: grid;
  min-height: 390px;
  color: var(--muted);
  text-align: center;
  place-items: center;
  align-content: center;
}

.empty-glyph {
  display: grid;
  width: 58px;
  height: 58px;
  margin-bottom: 16px;
  color: #9d8fb2;
  background: #f3eef8;
  border: 1px solid #e4dbea;
  border-radius: 18px;
  place-items: center;
  font-family: Georgia, serif;
  font-size: 30px;
}

.empty-preview strong {
  color: #51475e;
  font-size: 14px;
}

.empty-preview span {
  margin-top: 4px;
  font-size: 12px;
}

.warning-preview .empty-glyph {
  color: #9b3d15;
  background: #fff3eb;
  border-color: #f1d5c2;
}

.toc-preview {
  margin-bottom: 34px;
  padding-bottom: 25px;
  border-bottom: 1px solid #eee9f0;
}

.toc-preview h3 {
  margin: 0 0 14px;
  font-size: 18px;
  letter-spacing: -0.035em;
}

.toc-list,
.toc-list ol {
  margin: 0;
  padding-left: 18px;
  color: #70667b;
  font-size: 12px;
}

.toc-list li {
  margin: 5px 0;
  overflow-wrap: anywhere;
}

.toc-list li::marker {
  color: #a89bb6;
}

.heading-preview {
  display: flex;
  gap: 8px;
  align-items: baseline;
  margin: 20px 0 8px;
  font-weight: 750;
  letter-spacing: -0.025em;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.preview-level-badge {
  flex: 0 0 auto;
  padding: 2px 4px;
  color: #766b82;
  background: #f0ecf2;
  border-radius: 5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.35;
}

.heading-preview.level-1 {
  margin-top: 28px;
  font-size: 24px;
}

.heading-preview.level-2 {
  font-size: 19px;
}

.heading-preview.level-3 {
  font-size: 16px;
}

.heading-preview.level-4,
.heading-preview.level-5,
.heading-preview.level-6 {
  font-size: 13px;
}

.preview-rule {
  width: 58%;
  height: 5px;
  margin: 8px 0 16px;
  background: #ece8ee;
  border-radius: 9px;
}

.preview-rule.short {
  width: 38%;
}

.preview-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 16px 0;
  overflow: hidden;
  background: #faf8fc;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.preview-stats div {
  display: grid;
  padding: 10px;
  text-align: center;
}

.preview-stats div + div {
  border-left: 1px solid var(--line);
}

.preview-stats strong {
  font-size: 15px;
}

.preview-stats span {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.preview-limit {
  margin: 12px 0 -4px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.download-button {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 15px 17px;
  color: white;
  background: linear-gradient(120deg, var(--purple-dark), var(--purple) 62%, #9852db);
  border: 0;
  border-radius: 13px;
  box-shadow: 0 12px 24px rgba(109, 60, 232, 0.24);
  cursor: pointer;
  font-size: 13px;
  font-weight: 780;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    opacity 160ms ease;
}

.download-button:hover:not(:disabled) {
  box-shadow: 0 15px 30px rgba(109, 60, 232, 0.31);
  transform: translateY(-2px);
}

.download-button:disabled {
  color: #aaa2b4;
  background: #e9e4ed;
  box-shadow: none;
  cursor: not-allowed;
}

.download-icon {
  display: grid;
  width: 25px;
  height: 25px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 7px;
  place-items: center;
  font-size: 17px;
}

.download-button.processing .download-icon {
  animation: pulse 0.65s infinite alternate;
}

.download-hint {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.generation-error {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding: 11px 12px;
  color: #8e173d;
  background: #fff0f4;
  border: 1px solid #f3c0cf;
  border-radius: 10px;
  font-size: 12px;
}

.generation-error button {
  min-height: 36px;
  padding: 6px 10px;
  color: #8e173d;
  background: white;
  border: 1px solid #ef9cb4;
  border-radius: 8px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 750;
}

.prepared-link {
  display: block;
  margin-top: 12px;
  padding: 11px 12px;
  color: var(--purple-dark);
  background: #f3edff;
  border: 1px solid #d6c8f6;
  border-radius: 10px;
  font-size: 12px;
  font-weight: 750;
  text-align: center;
  text-decoration: none;
}

.prepared-link:hover {
  background: #ebe1ff;
}

footer {
  display: flex;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  margin: 44px auto 0;
  padding: 25px 0 34px;
  color: var(--muted);
  border-top: 1px solid rgba(96, 73, 120, 0.12);
  font-size: 12px;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 10;
  max-width: min(360px, calc(100% - 48px));
  padding: 12px 15px;
  color: white;
  background: #2f2540;
  border-radius: 11px;
  box-shadow: 0 16px 36px rgba(35, 26, 47, 0.24);
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

.noscript-message {
  position: fixed;
  right: 16px;
  bottom: 16px;
  left: 16px;
  z-index: 20;
  padding: 14px;
  color: #7f1736;
  background: #fff0f4;
  border: 1px solid #ef9cb4;
  border-radius: 12px;
  font-size: 14px;
  text-align: center;
}

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

@media (max-width: 900px) {
  .studio {
    grid-template-columns: 1fr;
    grid-template-areas:
      "upload"
      "preview"
      "palette"
      "options"
      "advanced";
  }

  .preview-column {
    position: static;
  }

  .notebook-page {
    min-height: 380px;
    max-height: none;
  }
}

@media (max-width: 720px) {
  .presets {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 580px) {
  .topbar,
  main,
  footer {
    width: min(100% - 24px, 1180px);
  }

  .topbar {
    padding-top: 16px;
  }

  .brand-tag,
  .quiet-link {
    display: none;
  }

  .intro {
    margin: 48px auto 38px;
  }

  .hero-sparkles {
    inset: -20px -4px auto;
    height: 170px;
  }

  .sparkle-one {
    left: 2%;
  }

  .sparkle-two {
    top: 74px;
    right: 0;
  }

  .sparkle-three {
    right: 12%;
  }

  .intro h1 {
    font-size: clamp(38px, 13vw, 58px);
  }

  .lede {
    font-size: 15px;
  }

  .name-story {
    font-size: 12px;
  }

  .name-equation {
    gap: 4px;
    padding: 6px 10px;
  }

  .privacy-note {
    width: 100%;
    font-size: 11px;
  }

  .privacy-note summary {
    justify-content: center;
  }

  .privacy-note p {
    margin-left: 2px;
  }

  .panel,
  .preview-column {
    padding: 19px;
    border-radius: 18px;
  }

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

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

  .notebook-page {
    min-height: 350px;
    padding: 28px 20px 28px 34px;
  }

  .file-summary {
    flex-wrap: wrap;
  }

  .file-copy {
    min-width: calc(100% - 58px);
  }

  .summary-button {
    flex: 1;
  }

  .advanced-panel .panel-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .disclosure-button {
    width: 100%;
    justify-content: space-between;
  }

  .heading-editor-list {
    max-height: none;
    padding-right: 0;
    overflow: visible;
  }

  .heading-editor-row {
    grid-template-columns: 62px minmax(0, 1fr) 44px;
  }

  .heading-order {
    display: none;
  }

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

  .runtime-status {
    min-height: 30px;
  }

  footer {
    display: grid;
    gap: 7px;
  }
}

@media (forced-colors: active) {
  .privacy-dot,
  .runtime-dot,
  .preset-dots {
    border: 1px solid currentColor;
  }

  .heading-editor-row.edited {
    border-width: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .sparkle {
    animation: none;
    opacity: 0.42;
    transform: none;
  }
}