/*
 * Nobiloop UI language v2
 * Quiet Learning — calm, clear, warm and reliable.
 *
 * This stylesheet is intentionally loaded after the legacy/page styles.
 * It provides the shared design-token and component layer while the
 * application behaviour and DOM ids remain unchanged.
 */

:root {
  /* Brand */
  --color-primary: #176b87;
  --color-primary-hover: #12566d;
  --color-primary-active: #0d4659;
  --color-primary-soft: #eef7fa;

  /* Text */
  --color-text: #222222;
  --color-text-secondary: #5f6368;
  --color-text-muted: #7a7f85;

  /* Surface */
  --color-background: #ffffff;
  --color-surface: #ffffff;
  --color-surface-subtle: #f7f8f8;
  --color-surface-brand: #f1f8fa;

  /* Border */
  --color-border: #dadde0;
  --color-border-light: #eceeef;

  /* Semantic */
  --color-success: #287a4b;
  --color-success-bg: #eef8f1;
  --color-warning: #946200;
  --color-warning-bg: #fff8e5;
  --color-error: #c43c35;
  --color-error-bg: #fff1f0;
  --color-focus: #ffd43b;

  /* Typography */
  --font-family-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont,
    "Segoe UI", "Yu Gothic", "YuGothic", sans-serif;
  --font-display: 3rem;
  --font-h1: 2.25rem;
  --font-h2: 1.75rem;
  --font-h3: 1.375rem;
  --font-body-lg: 1.125rem;
  --font-body: 1rem;
  --font-small: 0.875rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* Shape / elevation / motion */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;
  --shadow-floating: 0 4px 16px rgba(0, 0, 0, 0.08);
  --transition-fast: 150ms ease;
  --content-width: 1120px;
  --reading-width: 760px;

  /* Legacy aliases retained while page CSS is progressively simplified. */
  --ink: var(--color-text);
  --paper: var(--color-surface);
  --coral: var(--color-error);
  --mint: var(--color-primary);
  --yellow: var(--color-focus);
  --purple: #7b6aa8;
  --blue: var(--color-primary);
  --line: var(--color-border-light);
  --soft-line: var(--color-border);
  --shadow: none;
}

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

html {
  color: var(--color-text);
  background: var(--color-surface-subtle);
  font-family: var(--font-family-sans);
  font-size: 16px;
  line-height: 1.7;
}

body {
  min-width: 320px;
  margin: 0;
  padding: 0;
  color: var(--color-text);
  background: var(--color-surface-subtle);
  font-family: var(--font-family-sans);
}

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

button,
a,
input,
select,
textarea,
summary,
[role="button"] {
  touch-action: manipulation;
}

a {
  color: var(--color-primary);
  text-underline-offset: 0.2em;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

h1,
h2,
h3,
h4,
p {
  overflow-wrap: break-word;
  word-break: normal;
}

h1,
h2,
h3,
h4 {
  color: var(--color-text);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.35;
  text-wrap: balance;
}

h1 { font-size: clamp(1.75rem, 4vw, var(--font-h1)); }
h2 { font-size: clamp(1.5rem, 3vw, var(--font-h2)); }
h3 { font-size: clamp(1.15rem, 2vw, var(--font-h3)); }

[hidden] {
  display: none !important;
}

/* Page container */
.notebook,
.app-shell {
  position: relative;
  width: min(100%, var(--content-width));
  min-height: 100vh;
  margin: 0 auto;
  padding: var(--space-5) 32px var(--space-8);
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: var(--color-background);
  box-shadow: none;
}

.notebook::before,
.notebook::after {
  display: none;
}

.page-header,
.panel,
.game-screen {
  position: relative;
  z-index: auto;
  margin-left: auto;
  margin-right: auto;
}

.page-header {
  width: 100%;
  margin-bottom: var(--space-5);
}

.panel {
  width: min(100%, var(--reading-width));
  margin-top: var(--space-6);
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: none;
}

.objective,
.lead,
.field-note,
.control-note,
.history-intro,
.signed-in-email {
  color: var(--color-text-secondary);
  font-weight: 400;
  line-height: 1.7;
}

.eyebrow,
.section-label,
.selection-kicker,
.home-kicker {
  margin-bottom: var(--space-2);
  color: var(--color-primary);
  font-size: var(--font-small);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Brand and header */
.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-primary);
  text-decoration: none;
}

.persistent-home-link {
  display: inline-flex;
  width: fit-content;
  min-height: 44px;
  align-items: center;
  margin: 0 0 var(--space-3);
  color: var(--color-primary);
  font-size: var(--font-small);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.persistent-home-link::before {
  width: 9px;
  height: 9px;
  margin-right: 9px;
  border: 2px solid currentColor;
  border-radius: 50%;
  content: "";
}

.persistent-home-link:hover,
.persistent-home-link:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.persistent-home-link--inverse {
  color: #fff;
}

.brand-lockup h1 {
  margin: 0;
  color: var(--color-primary);
  font-size: 1.125rem;
  font-weight: 700;
}

.brand-mark {
  position: relative;
  display: block;
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  box-shadow: none;
  transform: none;
}

.brand-mark-loop {
  position: absolute;
  inset: 6px;
  width: auto;
  height: auto;
  border: 3px solid var(--color-primary);
  border-right-color: transparent;
  border-radius: 50%;
  transform: rotate(-30deg);
}

.brand-mark-loop::after {
  right: -2px;
  bottom: 1px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  transform: none;
}

.brand-mark-step {
  display: none;
}

.header-account-actions {
  top: 0;
  right: 0;
  gap: var(--space-2);
}

.header-account-button,
.header-logout-button {
  min-height: 44px;
  padding: 8px 12px;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  box-shadow: none;
  color: var(--color-text-secondary);
  font-size: var(--font-small);
  font-weight: 500;
  text-decoration: none;
  transform: none;
}

.header-account-button:hover,
.header-account-button:focus-visible,
.header-logout-button:hover,
.header-logout-button:focus-visible {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  transform: none;
}

/* Common controls */
input,
select,
textarea {
  min-height: 48px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:hover,
select:hover,
textarea:hover {
  border-color: #aeb4b9;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(23, 107, 135, 0.12);
}

.account-form,
.compact-account-form {
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.account-form label,
.compact-account-form label,
legend {
  font-weight: 500;
}

.primary-button,
.home-start-link,
.print-submit-bar .primary-button,
.print-actions .primary-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  background: var(--color-primary);
  box-shadow: none;
  color: #ffffff;
  cursor: pointer;
  font-size: var(--font-body);
  font-weight: 700;
  text-decoration: none;
  transform: none;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.primary-button:hover,
.home-start-link:hover,
.print-submit-bar .primary-button:hover,
.print-actions .primary-button:hover {
  border-color: var(--color-primary-hover);
  background: var(--color-primary-hover);
  transform: none;
}

.primary-button:active,
.home-start-link:active {
  border-color: var(--color-primary-active);
  background: var(--color-primary-active);
  box-shadow: none;
  transform: none;
}

.primary-button:disabled,
.print-submit-bar .primary-button:disabled {
  border-color: var(--color-border);
  background: var(--color-border);
  color: var(--color-text-muted);
  cursor: not-allowed;
  opacity: 1;
}

.secondary-button,
.management-row-action,
.home-secondary-link,
.small-navigation-button,
.analytics-more-button,
.guest-print-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 9px 16px;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: none;
  color: var(--color-primary);
  cursor: pointer;
  font-weight: 500;
  text-decoration: none;
  transform: none;
}

.secondary-button:hover,
.management-row-action:hover,
.home-secondary-link:hover,
.small-navigation-button:hover,
.analytics-more-button:hover {
  background: var(--color-primary-soft);
  box-shadow: none;
  transform: none;
}

.text-button,
.small-text-button,
.danger-text-button,
.text-link {
  min-height: 44px;
  padding: 8px 4px;
  border: 0;
  background: transparent;
  box-shadow: none;
  color: var(--color-primary);
  cursor: pointer;
  font-size: var(--font-small);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.danger-button {
  min-height: 48px;
  padding: 10px 18px;
  border: 1px solid var(--color-error);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: none;
  color: var(--color-error);
  font-weight: 700;
  transform: none;
}

/* Shared cards, alerts, tabs and progress */
.child-select-button,
.learning-mode-card,
.start-method-card,
.history-card,
.session-answer-card,
.problem-template-card,
.management-row,
.settings-menu button,
.profile-edit-card,
.next-stage-card,
.registration-benefit-card,
.guest-mode-card,
.overview-card,
.insight-card,
.comparison-card,
.parent-progress-card,
.practice-category-card {
  min-width: 0;
  max-width: 100%;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: none;
  transform: none;
}

:is(
  .child-select-button,
  .learning-mode-card,
  .start-method-card,
  .history-card,
  .session-answer-card,
  .problem-template-card,
  .management-row,
  .profile-edit-card,
  .next-stage-card,
  .registration-benefit-card,
  .guest-mode-card,
  .overview-card,
  .insight-card,
  .comparison-card,
  .parent-progress-card,
  .practice-category-card
) > * {
  min-width: 0;
  max-width: 100%;
}

:is(
  .child-select-button,
  .learning-mode-card,
  .start-method-card,
  .history-card,
  .session-answer-card,
  .problem-template-card,
  .management-row,
  .profile-edit-card,
  .next-stage-card,
  .registration-benefit-card,
  .guest-mode-card,
  .overview-card,
  .insight-card,
  .comparison-card,
  .parent-progress-card,
  .practice-category-card
) :is(h2, h3, h4, p, li, span, strong, a, button) {
  overflow-wrap: break-word;
  word-break: normal;
  word-break: auto-phrase;
}

.child-select-button:hover,
.learning-mode-card:hover,
.settings-menu button:hover,
.guest-mode-card:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  box-shadow: none;
  transform: none;
}

.count-badge,
.selection-label,
.mastery-rank,
.qa-mode-badge,
.start-method-badge,
.stage-number-chip,
.answer-result-badge {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 3px 9px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface-subtle);
  box-shadow: none;
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.3;
  transform: none;
}

.mastery-rank.is-gold,
.mastery-rank.is-master {
  border-color: rgba(23, 107, 135, 0.3);
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.account-message,
.status-message {
  color: var(--color-error);
  font-weight: 500;
}

.save-warning,
.deletion-warning,
.adult-gate-note,
.question-hint-message,
.qa-workspace-panel,
.qa-mode-panel,
.print-account-panel,
.recommendation-note {
  padding: var(--space-4);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  background: var(--color-surface-subtle);
  box-shadow: none;
  color: var(--color-text-secondary);
}

.save-warning,
.deletion-warning.is-account {
  border-color: #f1c2bf;
  background: var(--color-error-bg);
  color: var(--color-error);
}

.history-mode-tabs,
.detailed-period-options,
.answer-filter-buttons,
.admin-tabs {
  gap: var(--space-1);
  padding: var(--space-1);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  background: var(--color-surface-subtle);
  box-shadow: none;
}

.history-mode-tabs button,
.detailed-period-options button,
.answer-filter-buttons button,
.admin-tabs button {
  min-width: 0;
  min-height: 44px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  box-shadow: none;
  color: var(--color-text-secondary);
  font-weight: 500;
  white-space: normal;
  overflow-wrap: break-word;
  text-wrap: pretty;
  word-break: normal;
  word-break: auto-phrase;
}

.settings-menu button,
.duration-option label,
.diagnosis-grade-options label,
.print-mode-options label {
  min-width: 0;
  max-width: 100%;
  white-space: normal;
  overflow-wrap: break-word;
  text-wrap: pretty;
  word-break: normal;
  word-break: auto-phrase;
}

.settings-menu button > *,
.duration-option label > *,
.diagnosis-grade-options label > *,
.print-mode-options label > * {
  min-width: 0;
  max-width: 100%;
}

.history-mode-tabs button[aria-selected="true"],
.detailed-period-options button.is-active,
.answer-filter-buttons button.is-active,
.admin-tabs button[aria-selected="true"] {
  background: var(--color-surface);
  box-shadow: none;
  color: var(--color-primary);
  font-weight: 700;
}

/* Landing page */
.notebook:has(#auth-screen:not([hidden])),
.notebook:has(#home-screen:not([hidden])),
.notebook:has(#loading-screen:not([hidden])) {
  width: min(100%, var(--content-width));
}

.notebook:has(#auth-screen:not([hidden])) .page-header,
.notebook:has(#home-screen:not([hidden])) .page-header,
.notebook:has(#loading-screen:not([hidden])) .page-header {
  margin: 0;
}

.home-showcase {
  display: none !important;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.75fr);
  align-items: center;
  gap: clamp(40px, 7vw, 88px);
  min-height: 520px;
  padding: clamp(56px, 8vw, 96px) 16px clamp(48px, 7vw, 80px);
}

.notebook:has(#auth-screen:not([hidden])) .home-showcase,
.notebook:has(#home-screen:not([hidden])) .home-showcase,
.notebook:has(#loading-screen:not([hidden])) .home-showcase {
  display: grid !important;
}

.home-hero {
  margin-top: 0;
}

.home-hero h2 {
  max-width: 620px;
  margin-bottom: var(--space-5);
  font-size: clamp(2.4rem, 5vw, var(--font-display));
  line-height: 1.3;
  letter-spacing: 0;
}

.home-highlight {
  color: var(--color-text);
  white-space: normal;
}

.home-highlight::after {
  display: none;
}

.home-description {
  max-width: 560px;
  margin-bottom: var(--space-6);
  color: var(--color-text-secondary);
  font-size: var(--font-body-lg);
  font-weight: 400;
  line-height: 1.8;
}

.home-actions {
  gap: var(--space-3);
}

.home-start-link {
  min-width: 200px;
}

.home-guest-actions {
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.home-guest-link {
  min-height: 44px;
  padding: 8px 0;
  border: 0;
  color: var(--color-primary);
  font-size: var(--font-small);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.home-visual {
  position: relative;
  display: grid;
  min-height: 390px;
  margin: 0;
  place-items: center;
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.home-visual::before,
.home-visual::after {
  position: absolute;
  z-index: 0;
  border: 1px solid rgba(23, 107, 135, 0.16);
  border-radius: 50%;
  content: "";
}

.home-visual::before {
  width: 340px;
  height: 240px;
  transform: rotate(-14deg);
}

.home-visual::after {
  width: 250px;
  height: 330px;
  transform: rotate(18deg);
}

.home-learning-preview {
  position: relative;
  z-index: 1;
  width: min(100%, 300px);
  min-height: 360px;
  padding: 28px 24px 24px;
  border: 4px solid #dfe5e7;
  border-radius: 18px;
  background: var(--color-surface);
  box-shadow: 0 16px 36px rgba(23, 107, 135, 0.08);
}

.home-preview-heading {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
}

.home-preview-progress {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
  margin: var(--space-5) 0 var(--space-7);
}

.home-preview-progress span {
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--color-border-light);
}

.home-preview-progress .is-complete,
.home-preview-progress .is-current {
  background: var(--color-primary);
}

.home-preview-question {
  margin: 0 0 var(--space-5);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-align: center;
}

.home-preview-answer {
  display: block;
  width: 88px;
  height: 56px;
  margin: 0 auto var(--space-7);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.home-preview-button {
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #ffffff;
  font-weight: 700;
}

.auth-panel::before,
.auth-panel-icon,
.home-picture-features,
.home-visual-loop,
.math-card,
.growth-steps {
  display: none;
}

/* Learner selection and home */
.children-list,
.parent-home-list,
.learning-mode-options {
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.child-row {
  gap: var(--space-2);
}

.child-select-button {
  min-height: 64px;
  padding: 14px 16px;
  font-size: var(--font-body);
  font-weight: 700;
}

.child-select-button::after {
  color: var(--color-primary);
  font-size: var(--font-small);
  font-weight: 500;
}

.child-history-button {
  min-width: 84px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: none;
  color: var(--color-primary);
  font-weight: 500;
  transform: none;
}

.learning-mode-card {
  min-height: 104px;
  padding: var(--space-5);
  color: var(--color-text);
}

.learning-mode-icon,
.guest-mode-icon {
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  color: var(--color-primary);
  font-size: 1.1rem;
}

#setup-screen {
  padding: clamp(28px, 5vw, 48px);
}

.setup-stage-heading {
  display: grid;
  gap: var(--space-1);
}

.setup-stage-number {
  color: var(--color-primary);
  font-size: var(--font-small);
  font-weight: 500;
}

.setup-stage-title {
  font-size: clamp(1.5rem, 4vw, 2rem);
}

.setup-block {
  margin-top: var(--space-6);
}

.duration-options {
  gap: var(--space-2);
}

.duration-option label,
.diagnosis-grade-options label,
.deletion-mode-options label {
  min-height: 48px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: none;
  font-weight: 500;
  transform: none;
}

.duration-option input:checked + label,
.diagnosis-grade-options label:has(input:checked),
.deletion-mode-options label:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.duration-option input:focus-visible + label {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

#start-button {
  width: 100%;
  margin-top: var(--space-5);
}

/* Curriculum / history / parent report */
.history-summary,
.detailed-overview,
.result-stats {
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  background: var(--color-border-light);
}

.history-summary-item,
.overview-card,
.result-stat {
  padding: var(--space-5) var(--space-3);
  border: 0;
  border-radius: 0;
  background: var(--color-surface);
  box-shadow: none;
}

.history-summary-item strong,
.overview-card strong,
.result-stat strong {
  color: var(--color-text);
  font-size: 1.75rem;
  font-weight: 700;
}

.history-summary-item span,
.overview-card span,
.result-stat span {
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
}

.analytics-section {
  margin-top: var(--space-7);
  padding: 0;
  border: 0;
  border-top: 1px solid var(--color-border-light);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.analytics-section h3 {
  margin-top: var(--space-5);
}

.history-card {
  padding: var(--space-4);
}

.parent-progress-card,
.insight-card,
.comparison-card,
.practice-category-card {
  padding: var(--space-5);
}

.analysis-track,
.practice-stacked-bar {
  overflow: hidden;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--color-border-light);
}

.analysis-fill,
.practice-stack-segment {
  background: var(--color-primary);
}

.settings-menu,
.management-list {
  gap: 0;
  margin-top: var(--space-5);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
}

.settings-menu button,
.management-row {
  min-height: 68px;
  border: 0;
  border-bottom: 1px solid var(--color-border-light);
  border-radius: 0;
}

.settings-menu button:last-child,
.management-row:last-child {
  border-bottom: 0;
}

/* Diagnosis and learning */
.start-method-list {
  gap: var(--space-4);
}

.start-method-card {
  padding: var(--space-5);
}

.start-method-card.is-recommended {
  border-color: rgba(23, 107, 135, 0.4);
  background: var(--color-surface-brand);
  box-shadow: none;
}

.game-screen,
.diagnosis-game-screen {
  width: min(100%, 720px);
  margin-top: var(--space-6);
  padding: clamp(16px, 4vw, 32px) 0 var(--space-6);
}

.game-status {
  align-items: center;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
}

.game-actions {
  gap: var(--space-3);
}

.timer {
  min-width: 72px;
  padding: 4px 8px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--color-text-secondary);
}

.timer strong {
  color: var(--color-text);
}

.timer span {
  font-weight: 400;
}

.stop-button {
  min-height: 44px;
  padding: 8px 12px;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  box-shadow: none;
  color: var(--color-text-secondary);
  font-size: var(--font-small);
  font-weight: 500;
}

.finish-note {
  border: 1px solid rgba(148, 98, 0, 0.22);
  border-radius: var(--radius-md);
  background: var(--color-warning-bg);
  color: var(--color-warning);
  font-weight: 500;
}

.question-card {
  position: relative;
  min-height: 280px;
  margin-top: var(--space-6);
  padding: clamp(32px, 7vw, 64px) clamp(16px, 5vw, 40px);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: none;
}

.question,
.answer-display,
.fraction-expression,
.column-calculation,
.decimal-column-calculation,
.decimal-multiplication-calculation,
.decimal-division-calculation,
.long-division-calculation {
  color: var(--color-text);
  font-family: var(--font-family-sans);
  font-weight: 700;
}

.answer-display {
  border-bottom: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.answer-cell,
.decimal-answer-cell {
  color: var(--color-primary);
}

.answer-cell.is-entry-target,
.calculation-cell.is-active,
button.fraction-answer-part.is-active {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  box-shadow: 0 0 0 2px rgba(23, 107, 135, 0.18);
}

.question-hint-button {
  width: auto;
  min-width: 44px;
  min-height: 44px;
  margin-top: var(--space-3);
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: none;
  color: var(--color-primary);
  font-size: var(--font-small);
  font-weight: 700;
  transform: none;
}

.question-hint-button.is-next {
  border-radius: var(--radius-md);
  transform: none;
}

.question-hint-button:hover,
.question-hint-button:active,
.question-hint-button.is-next:active {
  background: var(--color-primary-soft);
  box-shadow: none;
  transform: none;
}

.question-hint-message {
  border-color: rgba(23, 107, 135, 0.2);
  background: var(--color-primary-soft);
  color: var(--color-text);
  font-weight: 400;
}

.keypad {
  width: min(100%, 520px);
  margin: var(--space-5) auto 0;
  gap: var(--space-2);
}

.keypad button,
.remainder-answer-display button,
button.fraction-answer-part {
  min-height: 56px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: none;
  color: var(--color-text);
  font-weight: 500;
  transform: none;
}

.keypad button:hover,
.remainder-answer-display button:hover,
button.fraction-answer-part:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.keypad button:active,
.remainder-answer-display button:active,
button.fraction-answer-part:active {
  box-shadow: none;
  transform: none;
}

.keypad .submit-key {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #ffffff;
  font-weight: 700;
}

.keypad .submit-key:hover {
  background: var(--color-primary-hover);
}

.keypad .decimal-key,
.keypad .fraction-switch-key,
.keypad .fraction-equals-key,
.keypad .fraction-undo-key {
  background: var(--color-surface-subtle);
}

.unknown-answer-button {
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.unknown-answer-button:hover,
.unknown-answer-button:focus-visible {
  background: var(--color-surface-subtle);
  color: var(--color-primary);
}

.feedback {
  min-height: 32px;
  color: var(--color-text);
  font-size: var(--font-body);
  font-weight: 500;
}

.feedback.is-good { color: var(--color-success); }
.feedback.is-retry { color: var(--color-error); }

.correct-mark {
  width: 72px;
  height: 72px;
  border: 3px solid var(--color-success);
  border-radius: 50%;
  background: var(--color-success-bg);
  box-shadow: none;
  transform: translate(-50%, -50%);
  animation: quiet-success-in 180ms ease-out both;
}

.correct-mark::after {
  color: var(--color-success);
  content: "✓";
  font-size: 2rem;
  font-weight: 700;
}

@keyframes quiet-success-in {
  from { opacity: 0; transform: translate(-50%, -50%) scale(0.92); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.result-panel {
  text-align: left;
}

.result-comment {
  color: var(--color-text-secondary);
  font-weight: 400;
}

.next-stage-card {
  padding: var(--space-5);
  border-color: rgba(23, 107, 135, 0.2);
  background: var(--color-surface-brand);
}

.registration-benefit-card {
  padding: var(--space-5);
  border-color: rgba(23, 107, 135, 0.2);
  background: var(--color-surface-brand);
  text-align: left;
}

.registration-benefit-card li,
.registration-benefit-card > p:last-child {
  color: var(--color-text-secondary);
  font-weight: 400;
}

.registration-benefit-card li span {
  border: 0;
  background: transparent;
  box-shadow: none;
  color: var(--color-success);
}

/* Print builder: selection is quiet; the paper preview is the visual focus. */
.print-builder {
  background: var(--color-surface-subtle);
}

.builder-header {
  width: min(100%, var(--content-width));
  margin: 0 auto;
  padding: var(--space-5) 32px;
  border: 0;
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-surface);
  box-shadow: none;
}

.builder-header h1 {
  margin-bottom: var(--space-1);
  font-size: var(--font-h2);
}

.builder-header p:not(.eyebrow) {
  color: var(--color-text-secondary);
}

.print-builder-main {
  width: min(100%, var(--content-width));
  margin: 0 auto;
  padding: var(--space-6) 32px var(--space-8);
}

.print-builder-workspace {
  gap: var(--space-6);
}

.print-controls,
.preview-section {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: none;
}

.print-controls {
  padding: var(--space-6);
}

.preview-section {
  padding: var(--space-5);
}

.print-mode-fieldset,
.print-account-panel,
.page-count-panel,
.guest-print-registration,
.classification-panel,
.representative-card {
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.print-mode-fieldset,
.print-account-panel,
.page-count-panel,
.guest-print-registration {
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-border-light);
}

.print-mode-options {
  gap: var(--space-2);
}

.print-mode-options label {
  min-height: 64px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: none;
}

.print-mode-options label:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.selection-level {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-border-light);
}

.selection-number {
  border: 0;
  background: var(--color-primary-soft);
  box-shadow: none;
  color: var(--color-primary);
}

.classification-panel {
  border-color: var(--color-border-light);
}

.classification-heading h3 {
  font-size: 0.95rem;
}

.guest-print-registration--below {
  width: min(100%, 720px);
  margin: var(--space-6) auto 0;
  padding: var(--space-5);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.choice-button-grid {
  gap: var(--space-2);
}

.choice-button,
.stage-choice-button,
.page-count-buttons button,
.step-back-button {
  min-width: 0;
  max-width: 100%;
  min-height: 48px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  box-shadow: none;
  color: var(--color-text);
  font-weight: 500;
  transform: none;
}

.choice-button {
  height: auto;
  white-space: normal;
  overflow-wrap: break-word;
  text-wrap: pretty;
  word-break: normal;
  word-break: auto-phrase;
}

.choice-button:hover,
.stage-choice-button:hover,
.page-count-buttons button:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  box-shadow: none;
  transform: none;
}

.choice-button.is-selected,
.choice-button[aria-pressed="true"],
.stage-choice-button.is-selected,
.stage-choice-button[aria-pressed="true"],
.page-count-buttons button.is-selected,
.page-count-buttons button[aria-pressed="true"] {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  box-shadow: inset 3px 0 0 var(--color-primary);
  color: var(--color-primary);
  transform: none;
}

.stage-choice-button {
  height: 74px;
  min-height: 74px;
  padding: var(--space-4);
  overflow: hidden;
}

.stage-choice-placeholder {
  visibility: hidden;
  pointer-events: none;
}

.stage-choice-button .stage-choice-name {
  display: -webkit-box;
  min-width: 0;
  overflow: hidden;
  overflow-wrap: break-word;
  text-wrap: pretty;
  word-break: normal;
  word-break: auto-phrase;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.stage-choice-button .stage-choice-category,
.stage-choice-button .stage-choice-example {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.classification-group .choice-button-grid {
  grid-template-columns: repeat(
    auto-fit,
    minmax(min(170px, 100%), 1fr)
  );
  grid-auto-rows: minmax(44px, auto);
}

.representative-card {
  margin-top: var(--space-5);
  padding: var(--space-6) 0 0;
  border-top: 1px solid var(--color-border-light);
}

.representative-expression {
  min-height: 112px;
  margin: var(--space-4) 0;
  border: 0;
  border-radius: var(--radius-md);
  background: var(--color-surface-subtle);
  color: var(--color-text);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
}

.print-submit-bar {
  position: static;
  margin-top: var(--space-6);
  padding: var(--space-5) 0 0;
  border: 0;
  border-top: 1px solid var(--color-border-light);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.print-preview {
  border-radius: var(--radius-md);
  background: #edf1f2;
}

.worksheet-sheet {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

/* Public, legal and administration pages */
.about-notebook,
.contact-notebook,
.legal-notebook,
.inquiry-notebook,
.admin-notebook {
  width: min(100%, var(--content-width));
}

.about-section,
.contact-section,
.legal-section,
.inquiry-section,
.admin-section,
.admin-card {
  border-color: var(--color-border-light);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: none;
}

.site-footer {
  border-top: 1px solid var(--color-border-light);
  background: var(--color-surface);
}

.site-footer a {
  color: var(--color-text-secondary);
  font-size: var(--font-small);
  font-weight: 500;
}

.answer-page {
  background: var(--color-surface-subtle);
}

.answer-shell {
  border-color: var(--color-border-light);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: none;
}

/* Responsive layouts are composed, not scaled. */
@media (min-width: 900px) {
  .notebook:has(#auth-screen:not([hidden])),
  .notebook:has(#loading-screen:not([hidden])) {
    display: block;
  }

  .notebook:has(#auth-screen:not([hidden])) .page-header,
  .notebook:has(#loading-screen:not([hidden])) .page-header {
    width: 100%;
  }

  .notebook:has(#auth-screen:not([hidden])) #auth-screen,
  .notebook:has(#loading-screen:not([hidden])) #loading-screen {
    width: min(100%, 560px);
    margin: var(--space-6) auto 0;
  }

  .notebook:has(#game-screen:not([hidden])) {
    width: min(100%, 840px);
  }

  #game-screen:not([hidden]) {
    display: block;
  }

  #game-screen .question-card,
  #game-screen .keypad,
  #game-screen #continue-button,
  #game-screen .feedback {
    margin-left: auto;
    margin-right: auto;
  }
}

@media (max-width: 899px) {
  .home-showcase {
    grid-template-columns: 1fr;
    min-height: 0;
    padding-top: var(--space-8);
  }

  .home-visual {
    min-height: 360px;
  }

  .print-builder-workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .notebook,
  .app-shell {
    padding: var(--space-4) 20px var(--space-7);
  }

  .page-header {
    display: block;
  }

  .header-account-actions {
    position: static;
    width: 100%;
    margin-top: var(--space-3);
    justify-content: flex-start;
  }

  .panel {
    margin-top: var(--space-5);
    padding: var(--space-5) 20px;
  }

  .home-showcase {
    gap: var(--space-6);
    padding: var(--space-7) 0 var(--space-6);
  }

  .home-hero h2 {
    font-size: clamp(2rem, 11vw, 2.8rem);
  }

  .home-description {
    font-size: var(--font-body);
  }

  .home-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .home-start-link,
  .home-secondary-link {
    width: 100%;
  }

  .home-guest-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .home-visual {
    min-height: 330px;
  }

  .home-learning-preview {
    min-height: 320px;
  }

  .builder-header,
  .print-builder-main {
    padding-left: 20px;
    padding-right: 20px;
  }

  .builder-header {
    align-items: flex-start;
  }

  .print-controls,
  .preview-section {
    padding: var(--space-5) 20px;
  }

  .question-card {
    min-height: 240px;
    padding: var(--space-6) var(--space-3);
  }

  .result-stats,
  .history-summary,
  .detailed-overview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  body {
    padding: 0;
  }

  .notebook {
    min-height: 100vh;
    padding: var(--space-4) 20px var(--space-7);
    border: 0;
    border-radius: 0;
    background: var(--color-background);
  }

  .page-header,
  .panel,
  .game-screen {
    margin-left: auto;
  }

  .brand-mark {
    flex-basis: 34px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
  }

  .brand-mark-loop {
    top: 6px;
    left: 6px;
    width: auto;
    height: auto;
    transform: rotate(-30deg);
  }

  .header-account-actions {
    gap: var(--space-1);
  }

  .header-account-button,
  .header-logout-button {
    min-height: 44px;
    padding: 7px 8px;
    font-size: 0.75rem;
  }

  .panel {
    padding: var(--space-5) 0;
    border: 0;
    border-radius: 0;
  }

  .auth-panel,
  .registration-benefit-card,
  .next-stage-card,
  .start-method-card {
    padding: var(--space-5);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
  }

  .child-row {
    grid-template-columns: minmax(0, 1fr) 76px;
  }

  .child-select-button::after {
    content: "選ぶ";
  }

  .diagnosis-grade-options {
    grid-template-columns: 1fr 1fr;
  }

  .question {
    font-size: clamp(2.35rem, 14vw, 3.4rem);
  }

  .answer-display {
    font-size: clamp(2.35rem, 14vw, 3.4rem);
  }

  .keypad button {
    min-height: 58px;
  }

  .print-controls,
  .preview-section {
    padding: var(--space-5) 16px;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .print-builder-main {
    padding-right: 0;
    padding-left: 0;
  }

  .print-builder-main > .print-builder-workspace {
    width: 100%;
  }
}

/* v2 polish: visual rhythm, official illustrations and denser summaries. */
.home-showcase {
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  column-gap: clamp(40px, 7vw, 88px);
  row-gap: clamp(36px, 5vw, 56px);
  min-height: 0;
  margin-top: var(--space-6);
  padding: clamp(48px, 7vw, 76px) clamp(28px, 5vw, 56px) clamp(32px, 5vw, 52px);
  border-radius: var(--radius-lg);
  background: #f5f9fa;
}

.home-visual {
  min-height: 0;
  margin: 0;
  transform: none;
}

.home-visual::before,
.home-visual::after {
  display: none;
}

.home-visual img {
  display: block;
  width: min(100%, 475px);
  height: auto;
  border: 0;
  border-radius: var(--radius-lg);
  background: transparent;
  box-shadow: none;
}

.home-feature-strip {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid rgba(23, 107, 135, 0.16);
}

.home-feature-strip article {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-5) clamp(12px, 2vw, 24px) 0;
  border-right: 1px solid rgba(23, 107, 135, 0.12);
}

.home-feature-strip article:first-child {
  padding-left: 0;
}

.home-feature-strip article:last-child {
  padding-right: 0;
  border-right: 0;
}

.home-feature-strip svg,
.learning-mode-icon svg,
.guest-mode-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.home-feature-strip svg {
  color: var(--color-primary);
}

.home-feature-strip strong,
.home-feature-strip span {
  display: block;
}

.home-feature-strip strong {
  margin-bottom: 2px;
  font-size: 0.95rem;
}

.home-feature-strip span {
  color: var(--color-text-secondary);
  font-size: 0.78rem;
  line-height: 1.6;
}

.learning-mode-icon,
.guest-mode-icon {
  display: inline-grid;
  width: 32px;
  height: 32px;
  place-items: center;
}

#setup-screen .stage-heading {
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-border-light);
}

#setup-screen .objective {
  max-width: 680px;
  margin-top: var(--space-5);
  color: var(--color-text-secondary);
}

.setup-stage-number {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.mastery-rank {
  position: relative;
  min-height: 24px;
  padding: 0 0 0 30px;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.mastery-rank::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 10px;
  height: 10px;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: var(--color-surface);
  content: "";
  transform: translateY(-50%);
}

.mastery-rank::after {
  position: absolute;
  top: 50%;
  left: 10px;
  width: 14px;
  border-top: 1px solid currentColor;
  content: "";
}

.mastery-rank.is-gold,
.mastery-rank.is-master {
  border: 0;
  background: transparent;
  color: var(--color-primary);
}

.learning-level-card {
  padding: var(--space-5) 0;
  border: 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.learning-level-card strong {
  font-size: clamp(1.5rem, 4vw, 2rem);
}

.parent-progress-list {
  gap: 0;
}

.parent-progress-card {
  padding: var(--space-5) 0;
  border: 0;
  border-bottom: 1px solid var(--color-border-light);
  border-radius: 0;
  background: transparent;
}

.parent-progress-heading span {
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.mastery-stage-row {
  border-right: 0;
  border-left: 0;
  border-radius: 0;
  background: transparent;
}

/* Unified Lucide line icons. */
.ui-icon {
  display: inline-block;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  fill: none !important;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
  vertical-align: middle;
}

.ui-icon--small {
  width: 18px;
  height: 18px;
}

.ui-icon--feature,
.home-feature-strip .ui-icon--feature {
  width: 26px;
  height: 26px;
}

.icon-label,
.icon-heading,
.small-text-button:has(.ui-icon),
.step-back-button:has(.ui-icon),
.small-navigation-button:has(.ui-icon),
.primary-button:has(.ui-icon),
.secondary-button:has(.ui-icon),
.text-link:has(.ui-icon) {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.icon-heading {
  justify-content: flex-start;
}

.icon-heading .ui-icon,
.section-label.icon-label .ui-icon {
  color: var(--color-primary);
}

.icon-heading.is-warning .ui-icon {
  color: var(--color-warning);
}

.feature-icon-shell {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 10px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.home-feature-strip article {
  grid-template-columns: 52px minmax(0, 1fr);
}

.header-account-button svg,
.header-logout-button svg {
  fill: none !important;
}

.header-logout-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.setup-learning-label {
  margin-bottom: var(--space-3);
}

.print-title-heading {
  gap: var(--space-3);
}

.print-title-heading .ui-icon {
  width: 28px;
  height: 28px;
}

@media (max-width: 899px) {
  .home-showcase {
    grid-template-columns: 1fr;
  }

  .home-visual img {
    width: min(100%, 430px);
  }
}

@media (max-width: 760px) {
  .home-showcase {
    margin-top: var(--space-5);
    padding: var(--space-7) 20px var(--space-5);
  }

  .home-visual {
    min-height: 0;
  }

  .home-feature-strip {
    grid-template-columns: 1fr;
  }

  .home-feature-strip article,
  .home-feature-strip article:first-child,
  .home-feature-strip article:last-child {
    padding: var(--space-4) 0;
    border-right: 0;
    border-bottom: 1px solid rgba(23, 107, 135, 0.12);
  }

  .home-feature-strip article:last-child {
    padding-bottom: 0;
    border-bottom: 0;
  }
}

@media (max-width: 480px) {
  .home-showcase {
    margin-right: -20px;
    margin-left: -20px;
    padding-right: 20px;
    padding-left: 20px;
    border-radius: 0;
  }

  .home-visual img {
    width: min(100%, 360px);
  }
}

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

/* Print builder: browse Stage cards on the left, confirm and create on the right. */
.print-builder .print-selection .selection-level {
  display: grid;
}

.print-builder .stage-browser-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.print-builder .stage-browser-heading h3,
.print-builder .stage-browser-heading p,
.print-builder .stage-result-count {
  margin: 0;
}

.print-builder .stage-browser-heading > p {
  max-width: 22em;
  color: var(--color-text-secondary);
  font-size: var(--font-small);
  line-height: 1.55;
  text-align: right;
}

.print-builder .selection-level--grade {
  padding-bottom: var(--space-3);
}

.print-builder .selection-level--stage {
  padding-top: var(--space-4);
}

.print-builder .selection-level--stage .selection-level-heading {
  justify-content: space-between;
}

.print-builder .stage-result-count {
  color: var(--color-text-secondary);
  font-size: var(--font-small);
  font-weight: 500;
  white-space: nowrap;
}

.print-builder .preview-section {
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

.print-builder .preview-section > * {
  min-width: 0;
}

.print-builder .preview-section .representative-card {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0 0 var(--space-3);
  border: 0;
  border-bottom: 1px solid var(--color-border-light);
}

.print-builder .preview-section .representative-expression {
  min-height: 68px;
  margin: 0;
  padding: var(--space-3);
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.print-builder .preview-section .representative-objective {
  font-size: var(--font-small);
  line-height: 1.45;
}

.print-builder .preview-section .small-navigation-button {
  min-height: 42px;
}

.print-builder .preview-section .preview-heading,
.print-builder .preview-section .page-count-panel,
.print-builder .preview-section .print-submit-bar {
  margin: 0;
}

.print-builder .preview-section .page-count-panel {
  padding: var(--space-3) 0;
}

.print-builder .preview-section .print-submit-bar {
  padding: var(--space-3) 0 0;
}

.print-builder .print-preview {
  width: 100%;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  align-items: start;
}

.print-builder .print-preview .paper-sheet {
  width: 100%;
}

.print-builder .preview-section .print-actions:not([hidden]) {
  position: sticky;
  z-index: 2;
  bottom: 0;
  padding-top: 8px;
  background: var(--color-surface);
}

.print-builder .mobile-preview-toggle,
.print-builder .mobile-print-action {
  display: none;
}

.print-builder .print-back-label-short {
  display: none;
}

.print-builder .print-account-panel:has(#print-child-field:not([hidden])) {
  grid-template-columns: minmax(180px, 240px);
  justify-content: end;
  padding-block: var(--space-2);
}

.print-builder .print-account-panel:has(#print-child-field:not([hidden])) > p {
  display: none;
}

.print-builder .print-controls[data-print-mode="manual-stage"] .recommendation-note {
  display: none;
}

@media (min-width: 600px) {
  .print-builder .print-controls > .section-heading {
    display: none;
  }

  .print-builder .print-controls[data-print-mode="manual-stage"] .print-account-panel {
    margin: 0;
  }

  .print-builder .print-controls[data-print-mode="manual-stage"] .print-mode-fieldset {
    padding-block: 6px;
  }

  .print-builder .print-controls[data-print-mode="manual-stage"] .print-mode-fieldset legend {
    display: none;
  }

  .print-builder .print-controls[data-print-mode="manual-stage"] .print-mode-options {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .print-builder .print-controls[data-print-mode="manual-stage"] .print-mode-options label {
    min-height: 38px;
    align-items: center;
    padding: 4px 7px;
  }

  .print-builder .print-controls[data-print-mode="manual-stage"] .print-mode-options label small,
  .print-builder .print-controls[data-print-mode="manual-stage"] .recommendation-note {
    display: none;
  }
}

@media (min-width: 1100px) {
  .print-builder .builder-header {
    margin-bottom: 0;
    padding: 8px 24px;
  }

  .print-builder .builder-header h1 {
    margin: 0;
    font-size: 1.35rem;
  }

  .print-builder .builder-header .eyebrow,
  .print-builder .builder-header p:not(.eyebrow) {
    display: none;
  }

  .print-builder .print-builder-main {
    padding-top: 14px;
  }

  .print-builder .print-controls {
    padding: 14px 18px;
  }

  .print-builder .print-controls > .control-note {
    display: none;
  }

  .print-builder .print-kind-fieldset,
  .print-builder .print-account-panel {
    padding: 8px 0;
  }

  .print-builder .print-account-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    font-size: 0.76rem;
    line-height: 1.35;
  }

  .print-builder .print-account-panel p {
    margin: 0;
  }

  .print-builder .print-account-panel label {
    grid-template-columns: auto minmax(120px, 1fr);
  }

  .print-builder .print-mode-options label {
    min-height: 42px;
    padding: 6px 8px;
  }

  .print-builder .print-mode-options label small {
    display: none;
  }

  .print-builder .print-mode-fieldset {
    padding: 8px 0;
  }

  .print-builder .recommendation-note {
    display: none;
  }

  .print-builder .print-selection {
    gap: 8px;
  }

  .print-builder .stage-browser-heading {
    padding: 8px 0;
  }

  .print-builder .stage-browser-heading h3 {
    font-size: 1rem;
  }

  .print-builder .stage-browser-heading > p {
    max-width: 19em;
    font-size: 0.78rem;
  }

  .print-builder .selection-level {
    gap: 8px;
    padding: 8px 0 0;
  }

  .print-builder .selection-level-heading h3 {
    font-size: 1rem;
  }

  .print-builder .choice-button {
    min-height: 42px;
    padding: 5px 7px;
    font-size: 0.8rem;
  }

  .print-builder .stage-choice-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    padding: 0;
  }

  .print-builder .stage-choice-button {
    grid-template-columns: auto minmax(0, 1fr);
    min-height: 72px;
    padding: 6px 8px;
  }

  .print-builder .stage-choice-button .stage-choice-number {
    grid-row: auto;
  }

  .print-builder .stage-choice-button .stage-choice-name,
  .print-builder .stage-choice-button .stage-choice-example {
    grid-column: 1 / -1;
  }

  .print-builder .stage-choice-button .stage-choice-number {
    font-size: 0.68rem;
  }

  .print-builder .stage-choice-button .stage-choice-name {
    font-size: 0.84rem;
  }

  .print-builder .stage-choice-button .stage-choice-example {
    font-size: 0.72rem;
  }

  .print-builder .stage-page-navigation .small-navigation-button {
    min-height: 38px;
  }

  .print-builder .print-builder-workspace {
    grid-template-columns: minmax(520px, 1fr) minmax(460px, 0.9fr);
    gap: var(--space-4);
  }

  .print-builder .preview-section {
    top: 12px;
    gap: 8px;
    max-height: calc(100dvh - 24px);
    padding: 14px 18px;
  }

  .print-builder .preview-section .representative-card {
    gap: 6px;
    padding-bottom: 8px;
  }

  .print-builder .preview-section > .print-kind-fieldset {
    padding: 4px 0 6px;
    border-top: 0;
  }

  .print-builder .preview-section > .print-kind-fieldset legend {
    font-size: 0.75rem;
  }

  .print-builder .preview-section > .print-kind-fieldset .print-mode-options label {
    min-height: 38px;
    padding: 4px 8px;
  }

  .print-builder .preview-section .representative-heading h4 {
    margin: 0;
    font-size: 0.98rem;
  }

  .print-builder .preview-section .stage-number-chip {
    padding: 3px 7px;
    font-size: 0.7rem;
  }

  .print-builder .preview-section .representative-expression {
    min-height: 54px;
    padding: 6px 10px;
    font-size: 1.6rem;
  }

  .print-builder .preview-section .representative-objective {
    display: none;
  }

  .print-builder .preview-section .small-navigation-button {
    min-height: 38px;
    padding: 6px 10px;
    font-size: 0.82rem;
  }

  .print-builder .preview-heading {
    align-items: center;
    gap: var(--space-3);
    margin-bottom: 0;
  }

  .print-builder .preview-heading .section-label {
    margin-bottom: 2px;
  }

  .print-builder .preview-heading h2 {
    font-size: 1.18rem;
  }

  .print-builder .preview-heading p:last-child {
    font-size: 0.72rem;
    line-height: 1.35;
  }

  .print-builder .print-preview {
    width: 100%;
    grid-template-columns: minmax(0, 1fr);
  }

  .print-builder .print-preview.print-preview--multi-sheet {
    width: 100%;
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    align-items: start;
  }

  .print-builder .print-preview.print-preview--multi-sheet .paper-sheet {
    width: 100%;
  }

  .print-builder .preview-section .page-count-panel {
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--space-3);
    padding: 8px 0;
  }

  .print-builder .preview-section .page-count-panel h3 {
    font-size: 0.98rem;
  }

  .print-builder .preview-section .page-count-panel .selection-kicker {
    display: none;
  }

  .print-builder .preview-section .page-count-panel p:last-child {
    display: none;
  }

  .print-builder .preview-section .page-count-buttons {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 6px;
  }

  .print-builder .preview-section .page-count-button {
    min-width: 0;
    min-height: 54px;
    padding: 5px 6px;
    font-size: 0.86rem;
  }

  .print-builder .preview-section .page-count-button > span {
    display: block;
    font-size: 0.78rem;
    line-height: 1.1;
    white-space: nowrap;
  }

  .print-builder .preview-section .page-count-button small {
    font-size: 0.62rem;
    white-space: nowrap;
  }

  .print-builder .preview-section .print-submit-bar {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 8px;
  }

  .print-builder .preview-section .print-submit-bar p {
    display: none;
  }

  .print-builder .preview-section .print-submit-bar .primary-button {
    width: 100%;
    min-width: 0;
    min-height: 44px;
  }
}

@media (max-width: 1099px) {
  .print-builder .preview-section .representative-card {
    padding-top: 0;
  }

  .print-builder .preview-section .page-count-panel {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 600px) and (max-width: 1099px) {
  .print-builder .builder-header {
    margin-bottom: 0;
    padding: 10px 20px;
  }

  .print-builder .builder-header h1 {
    margin: 0;
    font-size: 1.4rem;
  }

  .print-builder .builder-header .eyebrow,
  .print-builder .builder-header p:not(.eyebrow) {
    display: none;
  }

  .print-builder .print-builder-main {
    padding-top: 12px;
  }

  .print-builder .print-controls {
    padding: 14px 18px;
  }

  .print-builder .print-controls > .control-note {
    display: none;
  }

  .print-builder .print-account-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    padding: 8px 0;
    font-size: 0.76rem;
    line-height: 1.35;
  }

  .print-builder .print-account-panel p {
    margin: 0;
  }

  .print-builder .print-mode-fieldset {
    padding: 8px 0;
  }

  .print-builder .print-mode-options label {
    min-height: 44px;
    padding: 6px 8px;
  }

  .print-builder .print-mode-options label small,
  .print-builder .recommendation-note {
    display: none;
  }

  .print-builder .print-selection {
    gap: 8px;
  }

  .print-builder .selection-level {
    gap: 8px;
    padding: 8px 0 0;
  }

  .print-builder .selection-level-heading h3 {
    font-size: 1rem;
  }

  .print-builder .stage-choice-list {
    gap: 6px;
  }

  .print-builder .stage-choice-button {
    min-height: 52px;
    padding: 6px 8px;
  }
}

@media (max-width: 599px) {
  .print-builder .builder-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 14px;
  }

  .print-builder .builder-header h1 {
    margin: 0;
    font-size: 1.25rem;
    white-space: nowrap;
  }

  .print-builder .builder-header .print-title-heading .ui-icon {
    width: 22px;
    height: 22px;
  }

  .print-builder .builder-header .text-link {
    font-size: 0.72rem;
  }

  .print-builder .print-account-panel:has(#print-child-field:not([hidden])) {
    grid-template-columns: minmax(0, 1fr);
    justify-content: stretch;
    margin-block: 4px;
    padding-block: 4px;
  }

  .print-builder .print-account-panel:has(#print-child-field:not([hidden])) label {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 8px;
  }

  .print-builder #print-mode-fieldset {
    padding-block: 8px;
  }

  .print-builder #print-mode-fieldset legend {
    margin-bottom: 5px;
    font-size: 0.8rem;
  }

  .print-builder #print-mode-fieldset .print-mode-options {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 5px;
  }

  .print-builder #print-mode-fieldset .print-mode-options label {
    position: relative;
    min-height: 54px;
    align-items: center;
    justify-content: center;
    padding: 5px;
    text-align: center;
  }

  .print-builder #print-mode-fieldset .print-mode-options input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
  }

  .print-builder #print-mode-fieldset .print-mode-options label:has(input:focus-visible) {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
  }

  .print-builder #print-mode-fieldset .print-mode-options strong {
    font-size: 0.72rem;
    line-height: 1.25;
  }

  .print-builder #print-mode-fieldset .print-mode-options small {
    display: none;
  }

  .print-builder .choice-button-grid--grade {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 5px;
  }

  .print-builder .stage-browser-heading {
    display: block;
    padding: 10px 0;
  }

  .print-builder .stage-browser-heading > p {
    margin-top: 4px;
    max-width: none;
    font-size: 0.76rem;
    text-align: left;
  }

  .print-builder .selection-level--grade {
    gap: 7px;
    padding: 8px 0 10px;
  }

  .print-builder .selection-level--grade .selection-level-heading {
    display: none;
  }

  .print-builder .choice-button-grid--grade .choice-button {
    min-height: 42px;
    padding: 4px 2px;
    font-size: 0.72rem;
    line-height: 1.25;
  }

  .print-builder .classification-heading,
  .print-builder .classification-group {
    grid-template-columns: minmax(0, 1fr);
    gap: 5px;
  }

  .print-builder .classification-heading {
    display: none;
  }

  .print-builder .classification-heading > p {
    display: none;
  }

  .print-builder .classification-group .choice-button-grid,
  .print-builder .stage-choice-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .print-builder .classification-group .choice-button-grid--subject {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .print-builder .classification-group .choice-button {
    min-height: 42px;
    padding-inline: 4px;
    font-size: 0.7rem;
  }

  .print-builder .stage-choice-list {
    gap: 4px;
  }

  .print-builder .stage-choice-button {
    grid-template-columns: auto minmax(0, 1fr);
    height: 70px;
    min-height: 70px;
    padding: 6px;
    overflow: hidden;
  }

  .print-builder .stage-choice-button .stage-choice-number {
    grid-row: auto;
    font-size: 0.62rem;
  }

  .print-builder .stage-choice-button .stage-choice-category {
    font-size: 0.6rem;
  }

  .print-builder .stage-choice-button .stage-choice-name,
  .print-builder .stage-choice-button .stage-choice-example {
    grid-column: 1 / -1;
    max-width: 100%;
    overflow: hidden;
  }

  .print-builder .stage-choice-button .stage-choice-name {
    display: -webkit-box;
    font-size: 0.78rem;
    line-height: 1.25;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }

  .print-builder .stage-choice-button .stage-choice-example {
    font-size: 0.68rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .print-builder .mobile-preview-toggle {
    display: inline-flex;
    width: 100%;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-md);
    background: var(--color-surface);
    color: var(--color-primary);
    font-weight: 700;
  }

  .print-builder .preview-section:not(.is-mobile-preview-open) .print-preview {
    display: none;
  }

  .print-builder .mobile-print-action {
    position: fixed;
    z-index: 30;
    right: 8px;
    bottom: 8px;
    left: 8px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    padding: 9px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-floating);
    backdrop-filter: blur(8px);
  }

  .print-builder .mobile-print-action[hidden] {
    display: none;
  }

  .print-builder .mobile-print-action p {
    min-width: 0;
    margin: 0;
    overflow: hidden;
    font-size: 0.72rem;
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .print-builder .mobile-print-action .primary-button {
    min-height: 46px;
    padding: 8px 14px;
    white-space: nowrap;
  }

  .print-builder .preview-section .page-count-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .print-builder .preview-section .print-submit-bar {
    position: static;
    box-shadow: none;
  }
}

@media (max-width: 359px) {
  .print-builder .print-back-label {
    display: none;
  }

  .print-builder .print-back-label-short {
    display: inline;
  }
}

@media print {
  html,
  body {
    min-width: 0;
    background: #ffffff;
  }
}