:root {
  --paper: #ffffff;
  --ink: #111111;
  --muted: #5f5f5f;
  --line: #d7d7d7;
  --soft: #f6f6f6;
  --soft-2: #efefef;
  --max: 1180px;
  --radius-lg: 26px;
  --radius-md: 18px;
  --shadow: 0 20px 48px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(0, 0, 0, 0.04), transparent 28%),
    linear-gradient(180deg, #fafafa 0%, #f2f2f2 100%);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a,
input,
select,
textarea {
  font: inherit;
}

img,
svg {
  max-width: 100%;
  display: block;
}

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

.hub-topbar,
.hub-shell,
.activity-shell,
.admin-shell,
.hub-footer {
  width: min(calc(100% - 28px), var(--max));
  margin-inline: auto;
}

.hub-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 0;
}

.hub-brand {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.2rem;
  font-weight: 700;
}

.hub-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-size: 0.95rem;
}

.hub-nav a[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: 5px;
}

.hub-shell,
.activity-shell,
.admin-shell {
  padding-bottom: 48px;
}

.hero-card,
.content-card,
.worksheet-sheet,
.admin-card {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-card,
.content-card,
.admin-card {
  padding: 28px;
  margin-bottom: 18px;
}

.hero-card {
  display: grid;
  gap: 24px;
}

.compact-hero {
  grid-template-columns: 1fr;
}

.eyebrow,
.card-kicker,
.sheet-label {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

h1,
h2,
h3 {
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.1;
}

h1 {
  font-size: clamp(2rem, 7vw, 4rem);
  margin-top: 8px;
}

h2 {
  font-size: clamp(1.6rem, 5vw, 2.7rem);
}

h3 {
  font-size: 1.2rem;
}

.lead {
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  margin-top: 14px;
  max-width: 760px;
}

.supporting-copy,
.section-heading p,
.preview-card p,
.sheet-header p,
.note-panel,
.link-card span,
.sheet-footer span {
  color: var(--muted);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 11px 18px;
  border-radius: 999px;
  border: 1px solid var(--ink);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

.btn-primary {
  background: var(--ink);
  color: #fff;
}

.btn-outline {
  background: transparent;
}

.paper-stack {
  position: relative;
  min-height: 320px;
}

.mini-sheet {
  position: relative;
  width: min(320px, 100%);
  min-height: 230px;
  padding: 18px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.offset-sheet {
  position: absolute;
  top: 56px;
  left: 70px;
}

.mini-title,
.mini-footer {
  font-size: 0.85rem;
  font-weight: 700;
}

.mini-lines {
  height: 120px;
  margin: 22px 0;
  border: 2px solid var(--ink);
  border-radius: 18px;
  background:
    linear-gradient(180deg, transparent 0 24%, #111 24% 26%, transparent 26% 48%, #111 48% 50%, transparent 50% 72%, #111 72% 74%, transparent 74% 100%);
}

.offset-sheet svg path {
  fill: none;
  stroke: var(--ink);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.section-heading {
  margin-bottom: 18px;
}

.card-grid,
.stats-grid,
.link-grid {
  display: grid;
  gap: 14px;
}

.three-up {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.stats-grid {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.preview-card,
.stat-card,
.link-card,
.activity-listing,
.upload-record {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper);
  padding: 18px;
}

.preview-card h3,
.link-card strong {
  margin: 6px 0 8px;
}

.stat-card strong {
  display: block;
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 8px;
}

.split-layout {
  display: grid;
  gap: 18px;
}

.quiet-preview,
.note-panel {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, #fff 0%, #f7f7f7 100%);
  padding: 22px;
}

.writing-lines {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.writing-lines span {
  display: block;
  border-top: 1px solid #cfcfcf;
}

.spacious span {
  margin-top: 14px;
}

.link-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.link-card {
  display: grid;
  gap: 6px;
}

.text-link {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.hub-footer {
  padding: 0 0 42px;
  color: var(--muted);
}

.activity-body {
  background:
    radial-gradient(circle at top left, rgba(0, 0, 0, 0.03), transparent 26%),
    linear-gradient(180deg, #f8f8f8 0%, #efefef 100%);
}

.live-letter-body {
  background:
    radial-gradient(circle at top left, rgba(255, 219, 214, 0.18), transparent 26%),
    radial-gradient(circle at bottom right, rgba(255, 244, 200, 0.22), transparent 28%),
    linear-gradient(180deg, #faf7f3 0%, #f2eee7 100%);
}

.activity-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 22px 0 14px;
  flex-wrap: wrap;
}

.live-letter-body .activity-shell {
  width: min(calc(100% - 20px), 680px);
}

.live-letter-body .activity-toolbar {
  justify-content: center;
  gap: 10px;
  padding: 10px 0 8px;
}

.live-letter-body .trace-color-picker,
.live-letter-body .btn,
.live-letter-body .text-link {
  font-family: "Avenir Next", "Trebuchet MS", Arial, sans-serif;
}

.breadcrumb-link {
  font-size: 0.95rem;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.worksheet-sheet {
  padding: 26px;
  position: relative;
}

.live-letter-body .worksheet-sheet {
  padding: 14px;
  border-radius: 24px;
}

.live-letter-body .single-sheet-focus {
  box-shadow: 0 14px 28px rgba(47, 37, 33, 0.08);
}

.sheet-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.live-letter-header {
  justify-content: center;
  text-align: center;
  padding-bottom: 8px;
  border-bottom: 0;
}

.live-letter-header .eyebrow {
  color: #9a7568;
}

.live-letter-header h1 {
  margin-top: 0.2rem;
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", "Avenir Next", sans-serif;
  font-size: clamp(2rem, 7vw, 2.7rem);
}

.print-badge {
  flex: 0 0 110px;
  min-height: 110px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.qr-image {
  width: 90px;
  height: 90px;
  object-fit: contain;
}

.sheet-body {
  padding: 24px 0;
}

.sheet-footer {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  border-top: 1px solid var(--line);
  padding-top: 14px;
  font-size: 0.95rem;
}

.live-letter-footer {
  justify-content: center;
  border-top: 0;
  padding-top: 2px;
}

.scene-frame,
.maze-frame,
.quiet-frame {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--paper);
  padding: 18px;
}

.trace-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.trace-strip span,
.piece-card,
.match-box,
.seek-cell,
.number-row,
.trace-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.trace-strip span {
  padding: 18px;
  text-align: center;
  color: #b8b8b8;
  font-size: 2rem;
  font-weight: 700;
}

.trace-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.trace-play-shell {
  display: grid;
  gap: 16px;
}

.letter-sheet {
  display: grid;
  gap: 22px;
}

.letter-variant-nav {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.variant-chip {
  min-height: 42px;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  border: 1px solid #d7c1bc;
  background: #fff;
  color: #8a655c;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
}

.variant-chip.is-active {
  background: #f8e7ea;
  border-color: #d79aa9;
  color: #6d4b45;
}

.variant-slide {
  display: none;
}

.variant-slide.is-active {
  display: block;
}

.trace-controls-panel {
  display: grid;
  gap: 0.85rem;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(247,247,247,0.95));
}

.trace-color-picker {
  display: inline-grid;
  gap: 0.45rem;
  width: fit-content;
  font-weight: 700;
}

.trace-color-picker input {
  width: 72px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  padding: 0;
}

.trace-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.small-helper {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.letter-quote {
  margin-top: 0.45rem;
  color: #8a655c;
  font-size: 0.96rem;
  font-style: italic;
  line-height: 1.45;
}

.trace-sheet-panel {
  position: relative;
}

.trace-stage {
  position: relative;
  min-height: 700px;
  border-radius: 28px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
}

.trace-guide-surface {
  position: relative;
  z-index: 1;
  padding: 8px;
}

.trace-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  touch-action: none;
  background: transparent;
}

.enhanced-trace-grid {
  min-height: 500px;
  align-items: stretch;
}

.trace-card {
  min-height: 220px;
  padding: 18px;
}

.worksheet-letter-card {
  position: relative;
  min-height: 0;
  padding: 8px;
  border-radius: 18px;
  border: 0;
  background: #fff;
}

.single-uppercase-card {
  padding: 0;
}

.worksheet-a-outline {
  width: 100%;
  height: auto;
  display: block;
  max-height: 640px;
}

.letter-outline {
  width: 100%;
  height: 320px;
}

.letter-shape {
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", "Avenir Next", sans-serif;
  font-size: 230px;
  font-weight: 700;
  fill: #fff;
  stroke: #111;
  stroke-width: 10;
  paint-order: stroke fill;
}

.letter-dash {
  font-family: "Arial Rounded MT Bold", "Trebuchet MS", "Avenir Next", sans-serif;
  font-size: 230px;
  font-weight: 700;
  fill: none;
  stroke: #111;
  stroke-width: 3.2;
  stroke-dasharray: 13 13;
}

.lowercase-shape {
  font-size: 220px;
}

.giant-letter {
  display: grid;
  place-items: center;
  font-size: 7rem;
  font-weight: 800;
}

.giant-letter-guide {
  color: rgba(28, 28, 28, 0.12);
  font-size: clamp(7rem, 22vw, 13rem);
  line-height: 1;
}

.trace-card .trace-strip {
  grid-template-columns: 1fr;
  margin-top: 0;
}

.trace-card .trace-strip span {
  font-size: 3rem;
  letter-spacing: 0.15em;
}

.dots span {
  font-family: monospace;
}

.icon-card {
  display: grid;
  place-items: center;
  text-align: center;
  gap: 12px;
}

.stroke-notes,
.stroke-guides {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.stroke-bubble {
  position: absolute;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  background: #fff;
  color: #111;
  font-size: 1.15rem;
  font-weight: 700;
}

.worksheet-letter-card:first-child .bubble-one {
  top: 18px;
  left: calc(50% - 22px);
}

.worksheet-letter-card:first-child .bubble-two {
  top: 18px;
  left: calc(50% + 6px);
}

.worksheet-letter-card:first-child .bubble-three {
  top: 146px;
  left: 74px;
}

.worksheet-letter-card:last-child .bubble-one {
  top: 66px;
  right: 46px;
}

.worksheet-letter-card:last-child .bubble-two {
  top: 112px;
  right: 92px;
}

.guide-arrow {
  position: absolute;
  font-size: 2.5rem;
  line-height: 1;
  color: #111;
  font-weight: 700;
}

.uppercase-guides .guide-left {
  left: 30px;
  bottom: 68px;
}

.uppercase-guides .guide-right {
  right: 30px;
  bottom: 68px;
}

.uppercase-guides .guide-cross {
  left: 120px;
  top: 152px;
}

.lowercase-guides .guide-stem {
  right: 38px;
  bottom: 66px;
}

.lowercase-guides .guide-loop {
  right: 78px;
  bottom: 52px;
}

body.print-blank .trace-overlay {
  display: none !important;
}

.number-rows {
  display: grid;
  gap: 12px;
}

.number-row {
  display: grid;
  grid-template-columns: 90px 1fr 130px;
  gap: 12px;
  align-items: center;
  padding: 14px;
}

.dot-number {
  font-size: 2.6rem;
  font-weight: 800;
  text-align: center;
}

.trace-dots {
  color: #b4b4b4;
  font-size: 2rem;
  letter-spacing: 0.2em;
}

.dot-cluster {
  min-height: 48px;
  background-image: radial-gradient(circle, #111 0 5px, transparent 6px);
  background-size: 26px 26px;
  background-repeat: repeat;
}

.one {
  background-size: 100% 100%;
  background-position: center;
}

.two {
  background-size: 26px 26px;
}

.three {
  background-size: 20px 20px;
}

.four {
  background-size: 18px 18px;
}

.five {
  background-size: 16px 16px;
}

.matching-grid,
.cut-layout {
  display: grid;
  gap: 18px;
}

.match-column {
  display: grid;
  gap: 14px;
}

.match-box {
  min-height: 86px;
  display: grid;
  place-items: center;
  padding: 12px;
}

.match-box span {
  font-size: 1.2rem;
  font-weight: 700;
}

.matching-lines {
  display: grid;
  gap: 44px;
  align-content: center;
}

.matching-lines span {
  display: block;
  border-top: 2px dashed #bdbdbd;
}

.icon-match svg {
  width: 58px;
}

.build-stage {
  border: 1px dashed #bdbdbd;
  border-radius: 22px;
  padding: 18px;
}

.piece-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.piece-card {
  min-height: 88px;
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  font-weight: 700;
  text-transform: capitalize;
}

.seek-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.seek-cell {
  min-height: 110px;
  display: grid;
  place-items: center;
  text-transform: capitalize;
  font-size: 1.15rem;
}

.target-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.target-row span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  background: #fff;
}

.quiet-prompt-card {
  min-height: 380px;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
}

.large-prompt {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-family: Georgia, "Times New Roman", serif;
}

.plain-list {
  margin: 12px 0 0;
  padding-left: 18px;
}

.plain-list li + li {
  margin-top: 8px;
}

.studio-shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 14px 48px;
}

.studio-header,
.pack-hero,
.print-page {
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.studio-header,
.pack-hero {
  padding: 28px;
}

.pack-grid,
.print-grid {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.pack-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.pack-card,
.print-page {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.94);
}

.print-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}

.worksheet {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 18px;
  background: #fff;
}

.ghost-row,
.practice-row {
  display: grid;
  gap: 12px;
}

.ghost-row {
  grid-template-columns: repeat(4, 1fr);
  margin-top: 16px;
}

.trace-box,
.practice-box,
.shape-box,
.quiet-box,
.seek-box,
.color-box {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.trace-box {
  height: 150px;
  display: grid;
  place-items: center;
  color: #d3d3d3;
  font-size: 78px;
  font-weight: 800;
}

.practice-row {
  margin-top: 18px;
}

.practice-box {
  height: 92px;
  position: relative;
  padding: 16px 18px;
}

.practice-box::before,
.practice-box::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  border-top: 1px solid #d8d8d8;
}

.practice-box::before {
  top: 32px;
}

.practice-box::after {
  top: 62px;
}

.practice-symbol {
  position: absolute;
  left: 18px;
  top: 6px;
  font-size: 58px;
  color: #dddddd;
  font-weight: 800;
}

.match-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 14px;
}

.match-col {
  display: grid;
  gap: 14px;
}

.match-item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  align-items: center;
  padding: 10px;
  border: 1px solid #e9e9e9;
  border-radius: 16px;
}

.icon-box {
  width: 76px;
  height: 76px;
  display: grid;
  place-items: center;
  border: 1px solid #e8e8e8;
  border-radius: 16px;
  background: #fafafa;
}

.label {
  font-weight: 700;
  font-size: 1.05rem;
}

.shape-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
  align-items: start;
}

.house-stage {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fafafa;
  min-height: 280px;
}

.pieces-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.shape-box {
  padding: 10px;
  display: grid;
  place-items: center;
  min-height: 132px;
}

.seek-board {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.seek-box {
  padding: 12px;
  min-height: 110px;
  display: grid;
  place-items: center;
}

.target-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.target-pill {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 10px;
  background: #fafafa;
  font-size: 0.82rem;
  font-weight: 700;
}

.quiet-box {
  min-height: 430px;
  padding: 18px;
}

.line-stack {
  margin-top: 22px;
  display: grid;
  gap: 24px;
}

.line-stack span {
  display: block;
  border-top: 1px solid #d8d8d8;
}

.phrase {
  font-size: clamp(2.2rem, 5vw, 3.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  text-align: center;
}

.small-note {
  margin-top: 14px;
  font-size: 0.92rem;
  color: var(--muted);
}

.footer-note {
  margin-top: 16px;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: center;
}

.preview-shell {
  position: relative;
  width: 100%;
  min-height: 220px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at top right, rgba(0, 0, 0, 0.03), transparent 30%),
    linear-gradient(180deg, #fff 0%, #f6f6f6 100%);
  overflow: hidden;
}

.preview-shell::before {
  content: "";
  position: absolute;
  inset: 14px;
  border-radius: 14px;
  border: 1px solid rgba(17, 17, 17, 0.08);
}

.preview-mini-title {
  position: absolute;
  left: 18px;
  top: 14px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 800;
}

.preview-footer {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--muted);
  font-weight: 700;
}

.preview-dots {
  display: flex;
  gap: 6px;
}

.preview-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid #cfcfcf;
  background: #e8e8e8;
}

.preview-shell .preview-card {
  position: absolute;
  border-radius: 14px;
  border: 1px solid rgba(17, 17, 17, 0.08);
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.04);
}

.preview-coloring .preview-card.main {
  left: 20px;
  top: 40px;
  width: 58%;
  height: 128px;
  padding: 18px;
}

.preview-coloring .preview-card.side {
  right: 20px;
  top: 58px;
  width: 28%;
  height: 106px;
  padding: 12px;
}

.preview-coloring .preview-phrase {
  font-size: 24px;
  line-height: 1.02;
  font-weight: 800;
  max-width: 150px;
}

.preview-coloring .preview-lines,
.preview-quiet .preview-lines {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  display: grid;
  gap: 8px;
}

.preview-coloring .preview-lines span,
.preview-quiet .preview-lines span {
  display: block;
  border-top: 1px solid #d8d8d8;
}

.preview-coloring .preview-icon {
  position: absolute;
  right: 14px;
  bottom: 14px;
  width: 54px;
}

.preview-maze .preview-card.main {
  left: 20px;
  right: 20px;
  top: 42px;
  height: 136px;
  padding: 14px;
}

.preview-maze .preview-card.goal {
  right: 26px;
  bottom: 28px;
  width: 96px;
  height: 34px;
  padding: 8px 12px;
}

.preview-trace .preview-card.main {
  left: 20px;
  right: 20px;
  top: 42px;
  height: 140px;
  padding: 16px;
}

.preview-trace .preview-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 8px;
}

.preview-trace .preview-glyph,
.preview-trace .preview-line {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  height: 38px;
  display: grid;
  place-items: center;
}

.preview-trace .preview-glyph {
  font-size: 26px;
  color: #c8c8c8;
  font-weight: 800;
}

.preview-trace .preview-line {
  position: relative;
}

.preview-trace .preview-line::before,
.preview-trace .preview-line::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  border-top: 1px dashed #d8d8d8;
}

.preview-trace .preview-line::before {
  top: 14px;
}

.preview-trace .preview-line::after {
  top: 24px;
}

.preview-matching .preview-card.left,
.preview-matching .preview-card.right {
  top: 44px;
  width: 42%;
  height: 136px;
  padding: 12px;
}

.preview-matching .preview-card.left {
  left: 20px;
}

.preview-matching .preview-card.right {
  right: 20px;
}

.preview-matching .preview-pair {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 8px;
  align-items: center;
  margin-bottom: 10px;
}

.preview-matching .preview-icon-box {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  display: grid;
  place-items: center;
}

.preview-matching .preview-name {
  height: 10px;
  border-radius: 999px;
  background: #e3e3e3;
}

.preview-cut .preview-card.stage {
  left: 20px;
  top: 40px;
  width: 54%;
  height: 138px;
  padding: 14px;
}

.preview-cut .preview-card.pieces {
  right: 20px;
  top: 52px;
  width: 28%;
  height: 114px;
  padding: 10px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.preview-cut .preview-piece {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  display: grid;
  place-items: center;
}

.preview-find .preview-card.main {
  left: 20px;
  right: 20px;
  top: 44px;
  height: 134px;
  padding: 12px;
}

.preview-find .preview-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.preview-find .preview-cell {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  height: 48px;
  display: grid;
  place-items: center;
}

.preview-find .preview-targets {
  position: absolute;
  left: 20px;
  bottom: 22px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preview-find .preview-targets span {
  padding: 5px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 10px;
  font-weight: 800;
  color: var(--muted);
}

.preview-quiet .preview-card.main {
  left: 20px;
  right: 20px;
  top: 42px;
  height: 140px;
  padding: 16px;
}

.preview-quiet .prompt {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.admin-grid,
.form-grid {
  display: grid;
  gap: 14px;
}

.admin-card h2,
.admin-card h3 {
  margin-bottom: 12px;
}

.field-group {
  display: grid;
  gap: 6px;
}

.field-group input,
.field-group select,
.field-group textarea {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  background: #fff;
}

.field-group textarea {
  min-height: 118px;
  resize: vertical;
}

.admin-note,
.status-box {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  background: #fafafa;
  color: var(--muted);
}

.upload-feed {
  display: grid;
  gap: 12px;
}

.upload-record strong {
  display: block;
  margin-bottom: 4px;
}

.corner-watermark {
  position: fixed;
  right: 18px;
  bottom: 18px;
  display: inline-flex;
  gap: 7px;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid rgba(17, 17, 17, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 500ms ease, transform 500ms ease;
  pointer-events: none;
  z-index: 40;
}

.watermark-butterfly {
  font-size: 0.95rem;
}

body.watermark-visible .corner-watermark {
  opacity: 0.42;
  transform: translateY(0);
}

body.print-prep .corner-watermark {
  opacity: 0.24;
}

@media (min-width: 760px) {
  .hero-card {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }

  .split-layout {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: start;
  }

  .matching-grid {
    grid-template-columns: 1fr 110px 1fr;
    align-items: center;
  }

  .cut-layout {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }

  .seek-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 759px) {
  .live-letter-body .activity-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .live-letter-body .trace-color-picker {
    width: 100%;
    justify-items: center;
  }

  .live-letter-body .btn {
    width: 100%;
  }

  .print-badge {
    flex-basis: 86px;
    min-height: 86px;
  }

  .qr-image {
    width: 64px;
    height: 64px;
  }

  .sheet-header,
  .sheet-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .live-letter-header,
  .live-letter-footer {
    align-items: center;
  }

  .trace-stage {
    min-height: 540px;
  }

  .worksheet-letter-card {
    min-height: 0;
  }

  .live-letter-body .activity-shell {
    width: min(calc(100% - 12px), 560px);
  }

  .live-letter-body .worksheet-sheet {
    padding: 8px;
    border-radius: 18px;
  }

  .trace-guide-surface {
    padding: 4px;
  }

  .worksheet-a-outline {
    max-height: 500px;
  }

  .letter-outline {
    height: 270px;
  }

  .letter-shape,
  .letter-dash {
    font-size: 194px;
  }

  .lowercase-shape {
    font-size: 184px;
  }

  .offset-sheet {
    position: relative;
    top: -14px;
    left: 22px;
  }

  .number-row {
    grid-template-columns: 70px 1fr;
  }

  .number-row .dot-cluster {
    grid-column: 1 / -1;
  }
}

@media print {
  body {
    background: #fff;
  }

  .hub-topbar,
  .activity-toolbar,
  .hub-footer,
  .admin-shell,
  .button-row,
  .breadcrumb-link {
    display: none !important;
  }

  .activity-shell,
  .hub-shell {
    width: 100%;
    max-width: none;
    margin: 0;
    padding: 0;
  }

  .worksheet-sheet,
  .hero-card,
  .content-card {
    box-shadow: none;
    border-radius: 0;
    border: 0;
    margin: 0;
    padding: 0.4in;
  }

  .trace-controls-panel,
  [data-print-color],
  [data-print-blank],
  [data-clear-trace],
  [data-fill-example] {
    display: none !important;
  }

  .corner-watermark {
    opacity: 0.13 !important;
    background: transparent;
    border-color: transparent;
    right: 0.22in;
    bottom: 0.22in;
  }

  .print-badge {
    border-color: #e5e5e5;
  }

  .worksheet-sheet {
    min-height: 10.2in;
    page-break-after: always;
  }

  .worksheet-sheet:last-child {
    page-break-after: auto;
  }

  .trace-play-shell,
  .trace-stage {
    display: block;
    border: 0;
    min-height: auto;
  }

  .live-letter-body .activity-toolbar {
    display: none !important;
  }

  .worksheet-letter-card {
    break-inside: avoid;
  }

  .trace-guide-surface {
    padding: 0;
  }

  .enhanced-trace-grid {
    min-height: auto;
  }
}