:root {
  --navy: #24317a;
  --navy-2: #151d58;
  --mint: #a9f2d6;
  --cyan: #8fe5e7;
  --cyan-pale: #e8fffb;
  --pink: #d884b3;
  --pink-bright: #f28bb8;
  --pink-pale: #ffe8f2;
  --paper: #fff9fc;
  --yellow: #ffe995;
  --red: #d64a6c;
  --muted: #6570a1;
  --border: 3px solid var(--navy);
  --shadow: 7px 7px 0 var(--cyan);
  --font-ui: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-mono: Consolas, "Cascadia Mono", "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  min-width: 320px;
  background: var(--paper);
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--navy-2);
  background:
    linear-gradient(90deg, rgba(216, 132, 179, 0.08) 1px, transparent 1px) 0 0 / 36px 36px,
    linear-gradient(rgba(36, 49, 122, 0.045) 1px, transparent 1px) 0 0 / 36px 36px,
    linear-gradient(145deg, #fffafd 0%, #fff3f8 48%, #eafffb 100%);
  font-family: var(--font-ui);
}

body.modal-open {
  position: fixed;
  width: 100%;
  overflow: hidden;
}

[inert] {
  pointer-events: none;
  user-select: none;
}

.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;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--pink-bright);
  outline-offset: 2px;
}

.ghost-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  color: var(--pink);
  font: 700 42px/1 var(--font-mono);
  opacity: 0.1;
}

.ghost-layer span {
  position: absolute;
  transform: rotate(-8deg);
}

.ghost-layer span:nth-child(1) { top: 12%; left: 3%; }
.ghost-layer span:nth-child(2) { top: 36%; right: 6%; font-size: 120px; }
.ghost-layer span:nth-child(3) { top: 68%; left: 8%; font-size: 92px; }
.ghost-layer span:nth-child(4) { bottom: 6%; right: 5%; }
.ghost-layer span:nth-child(5) { top: 7%; right: 20%; font-size: 80px; }
.ghost-layer span:nth-child(6) { bottom: 16%; left: 32%; font-size: 68px; }

.prototype-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-height: 42px;
  padding: 5px 12px;
  overflow-x: auto;
  border-bottom: 3px solid var(--navy);
  background: var(--navy);
  color: #fff;
  scrollbar-width: thin;
}

.prototype-label {
  margin-right: 10px;
  color: var(--mint);
  font: 700 12px/1 var(--font-mono);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.prototype-nav button {
  flex: 0 0 auto;
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--mint);
  background: transparent;
  color: #fff;
  cursor: pointer;
  font-size: 12px;
}

.prototype-nav button:hover,
.prototype-nav button.is-current {
  background: var(--mint);
  color: var(--navy-2);
}

.nav-divider {
  width: 1px;
  height: 20px;
  margin: 0 6px;
  background: rgba(255, 255, 255, 0.35);
}

.browser-strip {
  display: grid;
  grid-template-columns: auto minmax(220px, 1fr) auto;
  align-items: center;
  gap: 18px;
  width: min(1180px, calc(100% - 40px));
  margin: 24px auto 12px;
  padding: 10px 14px;
  border: var(--border);
  background: var(--pink-pale);
  box-shadow: 5px 5px 0 var(--pink-bright);
  font: 700 14px/1 var(--font-mono);
}

.browser-strip .address {
  min-width: 0;
  padding: 6px 10px;
  overflow: hidden;
  border: 2px solid var(--navy);
  background: var(--cyan-pale);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.window-glyphs {
  word-spacing: 6px;
  white-space: nowrap;
}

.app-frame {
  width: min(1180px, calc(100% - 40px));
  min-height: 720px;
  margin: 0 auto 48px;
  border: var(--border);
  background: rgba(255, 249, 252, 0.95);
  box-shadow: 10px 10px 0 var(--navy), 16px 16px 0 var(--cyan);
}

.app-titlebar,
.window-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--mint);
  color: var(--navy-2);
  font: 700 13px/1 var(--font-mono);
  letter-spacing: 0.03em;
}

.app-titlebar {
  min-height: 38px;
  padding: 7px 12px;
  border-bottom: var(--border);
}

.app-header {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 28px;
  border-bottom: 2px solid var(--navy);
  background:
    linear-gradient(90deg, var(--pink) 0 16%, var(--paper) 16% 100%);
}

.brand-block {
  display: grid;
  grid-template-columns: auto auto;
  align-items: end;
  column-gap: 14px;
}

.brand-block strong {
  grid-row: 1 / 3;
  grid-column: 1;
  font-size: clamp(27px, 4vw, 44px);
  line-height: 1;
  letter-spacing: -0.07em;
}

.brand-kicker,
.brand-jp {
  grid-column: 2;
  font-family: var(--font-mono);
}

.brand-kicker {
  align-self: end;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.brand-jp {
  align-self: start;
  color: var(--muted);
  font-size: 13px;
}

.activity-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 240px;
  padding: 10px 14px;
  border: 2px solid var(--navy);
  background: var(--cyan-pale);
  box-shadow: 4px 4px 0 var(--pink-bright);
}

.status-dot {
  width: 13px;
  height: 13px;
  flex: 0 0 auto;
  border: 2px solid var(--navy);
  background: #5fd692;
}

.activity-chip div {
  display: grid;
  gap: 2px;
}

.activity-chip small {
  color: var(--muted);
}

.activity-chip[data-status="draft"],
.activity-chip[data-status="paused"] {
  background: var(--yellow);
}

.activity-chip[data-status="closed"] {
  background: var(--pink-pale);
}

.activity-chip[data-status="draft"] .status-dot,
.activity-chip[data-status="paused"] .status-dot {
  background: var(--yellow);
}

.activity-chip[data-status="closed"] .status-dot {
  background: var(--red);
}

.screen {
  display: none;
  padding: 30px 32px 36px;
}

.screen.is-active {
  display: block;
  animation: screen-in 160ms steps(2, end);
}

@keyframes screen-in {
  from { transform: translateY(3px); opacity: 0.78; }
  to { transform: translateY(0); opacity: 1; }
}

.window-card {
  border: var(--border);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.boot-window {
  width: min(620px, 100%);
  margin: 56px auto;
}

.activity-notice {
  margin-top: 20px;
  padding: 12px 14px;
  border: 2px dashed var(--navy);
  background: var(--yellow);
  color: var(--navy-2);
  font-weight: 700;
  line-height: 1.6;
}

.window-title {
  min-height: 34px;
  padding: 6px 9px;
  border-bottom: var(--border);
}

.window-body {
  padding: 26px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--pink);
  font: 700 12px/1.25 var(--font-mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

h1,
h2,
p {
  text-wrap: pretty;
}

h1,
h2 {
  margin: 0;
  line-height: 1.18;
}

h1 {
  font-size: clamp(30px, 4vw, 46px);
  letter-spacing: -0.04em;
}

h2 {
  font-size: 23px;
}

p {
  line-height: 1.72;
}

.register-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(380px, 1.1fr);
  align-items: start;
  gap: 30px;
}

.welcome-pane {
  display: grid;
  gap: 26px;
}

.compact-window .window-body {
  min-height: 265px;
  padding: 34px 30px;
  background:
    linear-gradient(135deg, transparent 72%, var(--pink-pale) 72% 100%),
    var(--paper);
}

.compact-window h1 {
  max-width: 390px;
}

.compact-window p:last-child {
  max-width: 460px;
  margin: 18px 0 0;
  font-size: 15px;
}

.pixel-note {
  position: relative;
  margin-left: 42px;
  box-shadow: -7px 7px 0 var(--pink-bright);
}

.pixel-note-body {
  display: grid;
  grid-template-columns: 144px 1fr;
  align-items: end;
  gap: 18px;
  min-height: 162px;
  padding: 16px 20px 18px 10px;
}

.pixel-note img {
  width: 144px;
  height: 144px;
  image-rendering: pixelated;
}

.yuriko-sprite {
  display: block;
  width: 144px;
  height: 144px;
  flex: 0 0 144px;
  background-image: url("assets/pixel-yuriko-sprite-sheet-by-kano.png");
  background-repeat: no-repeat;
  background-size: 432px 576px;
  background-position-x: var(--sprite-rest-frame, left);
  background-position-y: var(--sprite-row, top);
  image-rendering: pixelated;
  animation: yuriko-three-frame var(--sprite-duration, 1200ms) steps(1, end) infinite;
}

.yuriko-sprite.pose-neutral {
  --sprite-row: top;
  --sprite-rest-frame: left;
  --sprite-duration: 1600ms;
}

.yuriko-sprite.pose-resume {
  --sprite-row: 33.333%;
  --sprite-rest-frame: center;
  --sprite-duration: 1250ms;
}

.yuriko-sprite.pose-timeout {
  --sprite-row: 66.667%;
  --sprite-rest-frame: right;
  --sprite-duration: 900ms;
}

.yuriko-sprite.pose-submit {
  --sprite-row: bottom;
  --sprite-rest-frame: center;
  --sprite-duration: 750ms;
}

@keyframes yuriko-three-frame {
  0%, 24.999% { background-position-x: left; }
  25%, 49.999% { background-position-x: center; }
  50%, 74.999% { background-position-x: right; }
  75%, 100% { background-position-x: center; }
}

.pixel-note b {
  font-size: 16px;
}

.pixel-note p {
  margin: 8px 0;
  color: var(--muted);
  font-size: 13px;
}

.pixel-note small {
  color: var(--pink);
  font: 700 11px/1 var(--font-mono);
}

.form-window {
  box-shadow: 9px 9px 0 var(--cyan), 15px 15px 0 var(--pink-pale);
}

.form-body {
  display: grid;
  gap: 17px;
}

.mode-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border: 2px dashed var(--pink);
  background: var(--pink-pale);
  font-size: 13px;
}

.mode-note b {
  font-family: var(--font-mono);
}

.form-body > label,
.form-body fieldset {
  display: grid;
  gap: 7px;
  margin: 0;
  padding: 0;
  border: 0;
}

.form-body label > span,
.form-body legend {
  font-weight: 800;
}

.form-body label > small {
  color: var(--muted);
  font-size: 12px;
}

.form-body input[type="text"],
.form-body input:not([type]) {
  width: 100%;
}

.form-body > label > input,
.form-body fieldset > input {
  width: 100%;
  min-height: 46px;
  padding: 9px 12px;
  border: 2px solid var(--navy);
  border-radius: 0;
  background: #fff;
  color: var(--navy-2);
}

.form-body input::placeholder {
  color: #8d94b5;
}

.contact-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 100%;
  border: 2px solid var(--navy);
}

.contact-tabs label {
  position: relative;
  min-width: 0;
  cursor: pointer;
}

.contact-tabs label + label {
  border-left: 2px solid var(--navy);
}

.contact-tabs input {
  position: absolute;
  opacity: 0;
}

.contact-tabs span {
  display: grid;
  place-items: center;
  min-height: 44px;
  padding: 8px 12px;
  text-align: center;
}

.contact-tabs input:checked + span {
  background: var(--mint);
  box-shadow: inset 0 -4px 0 var(--navy);
}

.contact-tabs label:has(input:focus-visible) {
  outline: 3px solid var(--pink-bright);
  outline-offset: 3px;
  z-index: 1;
}

.privacy-copy {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 9px;
  align-items: start;
  padding: 10px 11px;
  border-left: 5px solid var(--cyan);
  background: var(--cyan-pale);
}

.privacy-copy > span {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 2px solid var(--navy);
  background: var(--mint);
  font: 700 13px/1 var(--font-mono);
}

.privacy-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.primary-button,
.secondary-button,
.text-button,
.back-button,
.category-card button,
.resume-banner button,
.connection-line button {
  border: 2px solid var(--navy);
  border-radius: 0;
  cursor: pointer;
  font-weight: 800;
  min-height: 44px;
}

.primary-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  padding: 10px 16px;
  background: var(--navy);
  color: #fff;
  box-shadow: 4px 4px 0 var(--pink-bright);
}

.primary-button:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--pink-bright);
}

.secondary-button,
.back-button,
.text-button {
  min-height: 44px;
  padding: 9px 13px;
  background: var(--paper);
}

.secondary-button:hover,
.back-button:hover,
.text-button:hover {
  background: var(--mint);
}

.form-error {
  min-height: 18px;
  margin: 0;
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
}

button:disabled,
input:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.operation-feedback {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 0;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.operation-feedback:not(:empty) {
  min-height: 44px;
  padding: 9px 11px;
  border: 2px solid var(--navy);
  background: var(--cyan-pale);
}

.operation-feedback.is-loading {
  background: var(--yellow);
}

.operation-feedback.is-error {
  border-color: var(--red);
  background: var(--pink-pale);
  color: #852743;
  font-weight: 700;
}

.operation-feedback.is-success {
  background: var(--mint);
  color: #1d684d;
  font-weight: 700;
}

.operation-feedback button {
  min-height: 36px;
  flex: 0 0 auto;
  padding: 6px 12px;
  border: 2px solid var(--navy);
  background: var(--paper);
  cursor: pointer;
  font-weight: 800;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.section-heading p:last-child {
  max-width: 680px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.resume-banner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  margin-bottom: 25px;
  padding: 12px 14px;
  border: var(--border);
  background: var(--yellow);
  box-shadow: 6px 6px 0 var(--pink-bright);
}

.resume-icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 2px solid var(--navy);
  background: #fff;
  font: 700 24px/1 var(--font-mono);
}

.resume-banner div {
  display: grid;
  gap: 3px;
}

.resume-banner small {
  color: #586184;
}

.resume-banner button {
  padding: 9px 13px;
  background: var(--navy);
  color: #fff;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.category-card {
  position: relative;
  display: flex;
  min-height: 330px;
  flex-direction: column;
  padding: 22px 18px 18px;
  border: var(--border);
  box-shadow: 6px 6px 0 var(--navy);
}

.category-card:nth-child(even) {
  transform: translateY(12px);
}

.cyan-card { background: var(--cyan-pale); }
.pink-card { background: var(--pink-pale); }
.white-card { background: var(--paper); }
.yellow-card { background: #fff8d8; }

.file-tab {
  position: absolute;
  top: -3px;
  right: -3px;
  padding: 7px 9px;
  border-left: 2px solid var(--navy);
  border-bottom: 2px solid var(--navy);
  background: var(--mint);
  font: 700 10px/1 var(--font-mono);
}

.category-code {
  display: block;
  margin: 36px 0 12px;
  color: var(--pink);
  font: 700 11px/1 var(--font-mono);
  letter-spacing: 0.08em;
}

.category-card h2 {
  font-size: 25px;
}

.category-card p {
  margin: 12px 0 auto;
  color: var(--muted);
  font-size: 13px;
}

.score-line {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin: 20px 0 12px;
  padding-top: 10px;
  border-top: 2px dashed var(--navy);
  font-size: 12px;
}

.score-line b {
  font-family: var(--font-mono);
}

.category-card button {
  width: 100%;
  min-height: 42px;
  background: var(--navy);
  color: #fff;
}

.category-card button:hover {
  background: var(--pink);
}

.quiz-topline {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
}

.quiz-context {
  display: grid;
  gap: 2px;
}

.quiz-context span {
  color: var(--pink);
  font: 700 12px/1 var(--font-mono);
}

.quiz-context b {
  font-size: 23px;
}

.timer {
  min-width: 145px;
  padding: 9px 14px;
  border: var(--border);
  background: var(--yellow);
  box-shadow: 4px 4px 0 var(--pink-bright);
  text-align: right;
}

.timer small {
  display: block;
  margin-bottom: 2px;
  font: 700 9px/1 var(--font-mono);
}

.timer strong {
  font: 800 27px/1 var(--font-mono);
}

.timer.is-urgent {
  background: var(--pink-bright);
  color: #fff;
}

.quiz-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 24px;
}

.question-map {
  align-self: start;
  box-shadow: 6px 6px 0 var(--pink-bright);
}

.question-map-body {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
  padding: 14px;
}

.question-map-body button {
  min-width: 44px;
  min-height: 44px;
  aspect-ratio: 1;
  border: 2px solid var(--navy);
  background: #fff;
  cursor: pointer;
  font: 700 12px/1 var(--font-mono);
}

.question-map-body button.is-answered {
  background: var(--mint);
}

.question-map-body button.is-current {
  background: var(--navy);
  color: #fff;
  box-shadow: inset 0 0 0 3px var(--pink-bright);
}

.map-legend {
  display: grid;
  gap: 5px;
  padding: 0 14px 14px;
  color: var(--muted);
  font-size: 11px;
}

.map-legend span {
  display: flex;
  align-items: center;
  gap: 7px;
}

.map-legend i {
  width: 12px;
  height: 12px;
  border: 2px solid var(--navy);
  background: #fff;
}

.map-legend i.answered {
  background: var(--mint);
}

.question-window {
  box-shadow: 8px 8px 0 var(--cyan), 14px 14px 0 var(--pink-pale);
}

.save-state {
  color: #1d684d;
  font-size: 11px;
}

.question-body {
  padding: 28px 30px 25px;
}

.question-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 15px;
}

.question-meta span {
  padding: 5px 8px;
  border: 2px solid var(--navy);
  background: var(--pink-pale);
  font: 700 10px/1 var(--font-mono);
}

.question-body h2 {
  max-width: 760px;
  font-size: clamp(23px, 3vw, 32px);
}

.question-hint {
  margin: 10px 0 20px;
  color: var(--muted);
  font-size: 13px;
}

.question-media {
  width: min(620px, 100%);
  margin: 0 0 20px;
  border: 2px solid var(--navy);
  background: var(--cyan-pale);
}

.question-media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 360px;
  object-fit: contain;
  background: var(--paper);
}

.synthetic-question-image {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  min-height: 150px;
  padding: 18px;
  background:
    linear-gradient(90deg, rgba(36, 49, 122, 0.08) 1px, transparent 1px) 0 0 / 18px 18px,
    linear-gradient(rgba(36, 49, 122, 0.08) 1px, transparent 1px) 0 0 / 18px 18px,
    var(--paper);
}

.synthetic-question-image span {
  display: grid;
  place-items: center;
  border: 3px solid var(--navy);
  background: var(--mint);
  box-shadow: 4px 4px 0 var(--pink-bright);
  font: 800 22px/1 var(--font-mono);
}

.question-media figcaption {
  padding: 7px 9px;
  border-top: 2px solid var(--navy);
  color: var(--muted);
  font-size: 11px;
}

.question-media.is-error img {
  display: none;
}

.question-media.is-error figcaption {
  border-top: 0;
  color: var(--red);
  font-weight: 800;
}

.options {
  display: grid;
  gap: 10px;
}

.options label {
  position: relative;
  display: grid;
  grid-template-columns: 38px 1fr;
  align-items: center;
  min-height: 52px;
  border: 2px solid var(--navy);
  background: #fff;
  cursor: pointer;
}

.options label:hover {
  transform: translateX(3px);
  background: var(--cyan-pale);
}

.options input[type="radio"] {
  position: absolute;
  opacity: 0;
}

.options label:has(input:checked) {
  background: var(--mint);
  box-shadow: 4px 4px 0 var(--pink-bright);
}

.options label:has(input:focus-visible) {
  outline: 3px solid var(--pink-bright);
  outline-offset: 3px;
}

.option-key {
  display: grid;
  place-items: center;
  align-self: stretch;
  border-right: 2px solid var(--navy);
  font: 800 14px/1 var(--font-mono);
}

.options label > span:last-child {
  padding: 10px 13px;
  font-size: 14px;
}

.options .fill-blank-answer {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 12px;
  padding: 12px;
}

.fill-blank-answer > span {
  font-weight: 800;
}

.fill-blank-answer > input {
  width: 100%;
  min-height: 46px;
  padding: 9px 12px;
  border: 2px solid var(--navy);
  border-radius: 0;
  background: #fff;
  color: var(--navy-2);
}

.quiz-actions {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
}

.quiz-actions > span {
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.connection-line {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  padding: 10px 13px;
  border: 2px solid var(--navy);
  background: var(--cyan-pale);
  color: var(--muted);
  font-size: 12px;
}

.connection-line span:nth-child(2) {
  flex: 1;
}

.connection-ok {
  color: #227254;
  font-weight: 800;
}

.connection-line button {
  min-height: 44px;
  padding: 6px 10px;
  background: var(--paper);
}

.result-layout {
  display: grid;
  grid-template-columns: minmax(340px, 0.78fr) minmax(0, 1.22fr);
  gap: 28px;
}

.score-window {
  align-self: start;
  box-shadow: 8px 8px 0 var(--pink-bright);
}

.score-body {
  text-align: center;
}

.score-display {
  display: flex;
  align-items: end;
  justify-content: center;
  margin: 14px 0 22px;
  color: var(--navy);
}

.score-display strong {
  font: 900 clamp(76px, 10vw, 118px)/0.85 var(--font-mono);
  letter-spacing: -0.12em;
}

.score-display span {
  margin-left: 10px;
  font: 700 25px/1 var(--font-mono);
}

.score-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 18px;
  border: 2px solid var(--navy);
}

.score-compare div {
  display: grid;
  gap: 4px;
  padding: 11px;
}

.score-compare div + div {
  border-left: 2px solid var(--navy);
}

.score-compare span {
  color: var(--muted);
  font-size: 11px;
}

.score-compare b {
  font-family: var(--font-mono);
}

.reward-box {
  display: grid;
  gap: 4px;
  padding: 15px;
  border: 3px dashed var(--navy);
  background: var(--yellow);
}

.reward-box span {
  font-size: 12px;
}

.reward-box strong {
  font-size: 27px;
  letter-spacing: 0.15em;
}

.reward-box small {
  color: #6f6684;
}

.result-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 18px;
}

.result-actions .primary-button {
  display: block;
}

.review-window {
  box-shadow: 8px 8px 0 var(--cyan);
}

.review-body {
  padding: 22px;
}

.review-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.review-heading h2 {
  font-size: 25px;
}

.review-heading p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.review-heading > span {
  padding: 6px 8px;
  border: 2px solid var(--navy);
  background: var(--pink-pale);
  font: 700 11px/1 var(--font-mono);
  white-space: nowrap;
}

.review-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.review-list li {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 9px;
  min-height: 49px;
  padding: 7px 9px;
  border: 2px solid var(--navy);
  background: #fff;
}

.review-list li > span:first-child {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  background: var(--navy);
  color: #fff;
  font: 700 11px/1 var(--font-mono);
}

.review-list li b {
  font-size: 13px;
}

.review-list li em {
  width: 24px;
  height: 24px;
  font: 800 17px/24px var(--font-mono);
  text-align: center;
  font-style: normal;
}

.review-list li.is-correct em {
  background: var(--mint);
  color: #15583f;
}

.review-list li.is-wrong em {
  background: var(--pink-pale);
  color: var(--red);
}

.timeout-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  align-items: start;
  gap: 28px;
}

.timeout-window {
  box-shadow: 8px 8px 0 var(--pink-bright), 14px 14px 0 var(--cyan);
}

.timeout-body {
  padding: 34px 32px;
}

.timeout-body > p:not(.eyebrow) {
  max-width: 650px;
  margin: 16px 0 22px;
  color: var(--muted);
  font-size: 15px;
}

.timeout-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 2px solid var(--navy);
  background: #fff;
}

.timeout-facts div {
  display: grid;
  gap: 5px;
  padding: 13px;
}

.timeout-facts div + div {
  border-left: 2px solid var(--navy);
}

.timeout-facts span {
  color: var(--muted);
  font-size: 11px;
}

.timeout-facts b {
  font-family: var(--font-mono);
}

.timeout-note {
  margin-top: 54px;
  box-shadow: -7px 7px 0 var(--pink-bright);
}

.timeout-note-body {
  display: grid;
  grid-template-columns: 144px 1fr;
  align-items: end;
  gap: 18px;
  padding: 20px 22px 22px 12px;
}

.timeout-note-body img {
  width: 144px;
  height: 144px;
  image-rendering: pixelated;
}

.timeout-note-body h2 {
  font-size: 23px;
}

.timeout-note-body p {
  margin: 9px 0;
  color: var(--muted);
  font-size: 13px;
}

.timeout-note-body small {
  color: var(--pink);
  font: 700 10px/1 var(--font-mono);
}

.modal-layer {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 20px;
}

.modal-layer[hidden] {
  display: none;
}

.modal-shade {
  position: absolute;
  inset: 0;
  background: rgba(21, 29, 88, 0.52);
  backdrop-filter: blur(2px);
}

.system-modal {
  position: relative;
  z-index: 1;
  width: min(690px, 100%);
  box-shadow: 10px 10px 0 var(--pink-bright), 16px 16px 0 var(--cyan);
}

.system-modal .window-title button {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  padding: 0;
  border: 2px solid var(--navy);
  background: var(--paper);
  cursor: pointer;
  font: 800 22px/1 var(--font-mono);
}

.system-modal-body {
  display: grid;
  grid-template-columns: 155px 1fr;
  align-items: end;
  gap: 24px;
  padding: 26px 30px 22px 18px;
  background: var(--paper);
}

.system-modal-body img {
  width: 144px;
  height: 144px;
  image-rendering: pixelated;
}

.system-modal-body h2 {
  font-size: 31px;
}

.system-modal-body p:not(.eyebrow) {
  margin: 10px 0;
  color: var(--muted);
  font-size: 14px;
}

.modal-detail {
  margin: 14px 0;
  padding: 10px 12px;
  border: 2px dashed var(--navy);
  background: var(--cyan-pale);
  font-size: 12px;
  line-height: 1.55;
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.modal-actions button {
  min-height: 44px;
  padding: 8px 13px;
  border: 2px solid var(--navy);
  background: var(--navy);
  color: #fff;
  cursor: pointer;
  font-weight: 800;
}

.modal-actions button.is-secondary {
  background: var(--paper);
  color: var(--navy-2);
}

.sprite-credit {
  display: block;
  padding: 6px 10px;
  border-top: 2px solid var(--navy);
  background: var(--pink-pale);
  color: var(--pink);
  font: 700 10px/1 var(--font-mono);
  text-align: right;
}

@media (max-width: 960px) {
  .category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .category-card:nth-child(even) {
    transform: none;
  }

  .quiz-layout {
    grid-template-columns: 1fr;
  }

  .question-map-body {
    grid-template-columns: repeat(8, 1fr);
  }

  .map-legend {
    grid-template-columns: auto auto;
  }

  .result-layout {
    grid-template-columns: 1fr;
  }

  .timeout-layout {
    grid-template-columns: 1fr;
  }

  .timeout-note {
    margin-top: 0;
  }
}

@media (max-width: 760px) {
  .options .fill-blank-answer {
    grid-template-columns: minmax(0, 1fr);
  }

  .prototype-nav {
    justify-content: flex-start;
  }

  .nav-divider {
    display: none;
  }

  .prototype-label {
    position: sticky;
    left: 0;
    z-index: 2;
    padding: 8px 10px;
    background: var(--navy);
  }

  .browser-strip {
    width: calc(100% - 22px);
    margin-top: 12px;
    grid-template-columns: 1fr auto;
    gap: 8px;
  }

  .browser-strip > span:first-child {
    display: none;
  }

  .app-frame {
    width: calc(100% - 22px);
    min-height: 0;
    margin-bottom: 30px;
    box-shadow: 6px 6px 0 var(--navy), 10px 10px 0 var(--cyan);
  }

  .app-header {
    display: grid;
    gap: 14px;
    padding: 18px 16px;
    background: linear-gradient(90deg, var(--pink) 0 9px, var(--paper) 9px 100%);
  }

  .brand-block {
    grid-template-columns: 1fr;
  }

  .brand-block strong,
  .brand-kicker,
  .brand-jp {
    grid-column: 1;
  }

  .brand-block strong {
    grid-row: 2;
  }

  .brand-kicker { grid-row: 1; }
  .brand-jp { grid-row: 3; }

  .activity-chip {
    min-width: 0;
  }

  .screen {
    padding: 22px 16px 28px;
  }

  .register-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .compact-window .window-body {
    min-height: 0;
    padding: 26px 21px;
  }

  .pixel-note {
    margin-left: 18px;
  }

  .pixel-note-body {
    grid-template-columns: 96px 1fr;
    gap: 12px;
    padding: 12px 13px 15px 7px;
  }

  .pixel-note img {
    width: 96px;
    height: 96px;
  }

  .yuriko-sprite {
    width: 96px;
    height: 96px;
    flex-basis: 96px;
    background-size: 288px 384px;
  }

  .window-body {
    padding: 20px 17px;
  }

  .mode-note {
    align-items: start;
    flex-direction: column;
  }

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

  .resume-banner {
    grid-template-columns: auto 1fr;
  }

  .resume-banner button {
    grid-column: 1 / -1;
  }

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

  .category-card {
    min-height: 275px;
  }

  .quiz-topline {
    grid-template-columns: auto 1fr;
  }

  .timer {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-width: 0;
    text-align: left;
  }

  .timer small {
    margin: 0;
  }

  .question-map-body {
    grid-template-columns: repeat(5, 1fr);
  }

  .question-body {
    padding: 22px 15px 18px;
  }

  .question-body h2 {
    font-size: 23px;
  }

  .synthetic-question-image {
    grid-template-columns: 1fr 1fr;
    min-height: 210px;
    padding: 14px;
  }

  .quiz-actions {
    grid-template-columns: 1fr 1fr;
  }

  .quiz-actions > span {
    grid-column: 1 / -1;
    grid-row: 1;
  }

  .connection-line {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .connection-line span:nth-child(2) {
    flex-basis: calc(100% - 95px);
  }

  .connection-line button {
    margin-left: auto;
  }

  .result-actions,
  .review-list {
    grid-template-columns: 1fr;
  }

  .timeout-body {
    padding: 26px 18px;
  }

  .timeout-facts {
    grid-template-columns: 1fr;
  }

  .timeout-facts div + div {
    border-top: 2px solid var(--navy);
    border-left: 0;
  }

  .timeout-note-body {
    grid-template-columns: 96px 1fr;
    gap: 13px;
    padding: 17px 15px 18px 8px;
  }

  .timeout-note-body img {
    width: 96px;
    height: 96px;
  }

  .system-modal-body {
    grid-template-columns: 96px 1fr;
    gap: 13px;
    padding: 20px 17px 18px 8px;
  }

  .system-modal-body img {
    width: 96px;
    height: 96px;
  }

  .system-modal-body h2 {
    font-size: 24px;
  }
}

@media (max-width: 410px) {
  .prototype-nav button {
    padding-inline: 8px;
  }

  .window-glyphs {
    word-spacing: 2px;
  }

  .app-titlebar {
    font-size: 11px;
  }

  .form-body {
    gap: 15px;
  }

  .question-map-body {
    gap: 5px;
  }

  .system-modal-body {
    display: block;
    padding-left: 16px;
  }

  .system-modal-body img {
    width: 96px;
    height: 96px;
    float: left;
    margin: 0 12px 6px 0;
  }

  .system-modal-body .yuriko-sprite {
    float: left;
    margin: 0 12px 6px 0;
  }
}

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

  .yuriko-sprite {
    animation: none !important;
  }
}