/* Hallmark v2.0.0 · theme: Cobalt (manual, no scripts run) · shape: app screen · genre: modern-minimal · signature: the concept table */
/* critique: ASCII field, hero and section rhythm left out on purpose (app screen); cobalt only on the primary key, the current selection and status marks. */
/* waive: none */

:root {
  --color-paper: #f3f6fb;
  --color-paper-2: #e9eef6;
  --color-paper-3: #dde4ef;
  --color-surface: #ffffff;
  --color-ink: #141b2b;
  --color-ink-2: #2d3850;
  --color-muted: #52607a;
  --color-rule: #c9d2e0;
  --color-rule-2: #a9b5c9;
  --color-accent: #1f4bff;
  --color-accent-ink: #ffffff;
  --color-accent-wash: #e3eaff;
  --color-accent-edge: #1739c4;
  --color-accent-2: #8fb0ff;
  --color-key-face: #ffffff;
  --color-focus: #1f4bff;
  --color-error: #b3261e;
  --color-error-wash: #fbe9e7;
  --color-graphite: #121826;
  --color-graphite-2: #1e2740;
  --color-graphite-ink: #e6ecf8;
  --color-graphite-muted: #8d9ab5;
  --color-syntax-string: #c5d4fa;
  --color-syntax-number: #a8bffa;
  --color-skeleton: #e2e8f2;
  --color-skeleton-glow: #eef2f9;

  --font-display:
    "Familjen Grotesk", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  --font-body: "IBM Plex Sans", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  --font-outlier: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --step--1: 0.875rem;
  --step-0: 1rem;
  --step-1: 1.125rem;
  --step-2: 1.266rem;
  --step-3: 1.424rem;
  --step-4: 1.602rem;
  --step-5: 1.802rem;

  --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;

  --radius-input: 6px;
  --radius-card: 8px;
  --cut-l: 4px;
  --shadow-key: 0 3px 0 var(--color-rule-2);
  --shadow-key-accent: 0 3px 0 var(--color-accent-edge);
  --shadow-key-press: 0 0 0 transparent;
  --shadow-card: 0 1px 0 var(--color-rule), 0 6px 16px -12px var(--color-ink-2);
  --dur-micro: 120ms;
  --measure: 44rem;
  --page-width: 76rem;
}

@font-face {
  font-family: "Familjen Grotesk";
  font-weight: 500;
  font-display: swap;
  src: url("/fonts/familjen-grotesk-500.woff2") format("woff2");
}

@font-face {
  font-family: "Familjen Grotesk";
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/familjen-grotesk-600.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Sans";
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/ibm-plex-sans-400.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Sans";
  font-weight: 500;
  font-display: swap;
  src: url("/fonts/ibm-plex-sans-500.woff2") format("woff2");
}

@font-face {
  font-family: "JetBrains Mono";
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/jetbrains-mono-400.woff2") format("woff2");
}

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

html,
body {
  overflow-x: clip;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.6;
  word-break: keep-all;
  overflow-wrap: break-word;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.25;
  color: var(--color-ink);
  overflow-wrap: break-word;
  min-width: 0;
}

h1 {
  font-size: var(--step-5);
}

h2 {
  font-size: var(--step-4);
}

h3 {
  font-size: var(--step-3);
}

h4 {
  font-size: var(--step-2);
}

p {
  margin: 0;
}

a {
  color: var(--color-ink);
  text-decoration-color: var(--color-rule-2);
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-color: var(--color-accent);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -4rem;
  z-index: 10;
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-rule-2);
}

.skip-link:focus-visible {
  top: var(--space-3);
}

.noscript-note {
  margin: var(--space-5) auto;
  max-width: var(--measure);
  padding: var(--space-4);
}

/* Status mark: one icon plus text, never a filled chip. */
.status-icon {
  flex: none;
}

.status-mark {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step--1);
  color: var(--color-muted);
  white-space: nowrap;
}

.status-mark.is-accent {
  color: var(--color-accent);
}

.status-mark.is-error {
  color: var(--color-error);
}

/* App bar and page frame */
.app-bar {
  border-bottom: 1px solid var(--color-rule);
  background: var(--color-paper);
}

.app-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  max-width: var(--page-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-5);
}

.app-bar-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--step-2);
  text-decoration: none;
}

.app-bar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.app-bar-nav a,
.breadcrumb a {
  font-size: var(--step--1);
  text-decoration: none;
  padding-block: var(--space-2);
  border-bottom: 2px solid transparent;
}

.app-bar-nav a:hover,
.breadcrumb a:hover {
  border-bottom-color: var(--color-accent);
}

.app-main {
  max-width: var(--page-width);
  margin: 0 auto;
  padding: var(--space-5) var(--space-5) var(--space-7);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  font-size: var(--step--1);
  color: var(--color-muted);
}

/* Keys (buttons) */
.key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-rule-2);
  border-radius: var(--radius-input);
  background: var(--color-key-face);
  color: var(--color-ink);
  box-shadow: var(--shadow-key);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step-0);
  text-decoration: none;
  cursor: pointer;
  transition:
    transform var(--dur-micro) ease-out,
    box-shadow var(--dur-micro) ease-out;
}

.key:hover {
  transform: translateY(-1px);
}

.key:active {
  transform: translateY(3px);
  box-shadow: var(--shadow-key-press);
}

.key.is-primary {
  background: var(--color-accent);
  border-color: var(--color-accent-edge);
  color: var(--color-accent-ink);
  box-shadow: var(--shadow-key-accent);
}

.key.is-primary:active {
  box-shadow: var(--shadow-key-press);
}

.key[aria-disabled="true"],
.key:disabled {
  opacity: 0.55;
  pointer-events: none;
}

.key[aria-busy="true"] {
  cursor: progress;
}

/* Cut-corner panels */
.panel {
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

@supports (corner-shape: bevel) {
  .panel,
  .field,
  .editor-frame {
    border-radius: var(--cut-l);
    corner-shape: bevel round bevel round;
  }
}

.panel-title {
  font-size: var(--step-1);
  margin-bottom: var(--space-3);
}

.field {
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-muted);
  border-radius: var(--radius-card);
  background: var(--color-surface);
}

.field:focus-visible,
.field:focus-within {
  border-color: var(--color-accent);
}

.field.has-error {
  border-color: var(--color-error);
}

/* Loading, errors, notices */
.skeleton-line {
  display: block;
  height: 1em;
  border-radius: var(--radius-input);
  background: linear-gradient(
    90deg,
    var(--color-skeleton),
    var(--color-skeleton-glow),
    var(--color-skeleton)
  );
  background-size: 200% 100%;
  animation: skeleton-sweep 1.4s linear infinite;
}

@keyframes skeleton-sweep {
  from {
    background-position: 100% 0;
  }

  to {
    background-position: -100% 0;
  }
}

.notice {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-rule-2);
  border-radius: var(--radius-card);
  background: var(--color-paper-2);
  color: var(--color-ink-2);
}

.notice.is-error {
  border-color: var(--color-error);
  background: var(--color-error-wash);
}

.notice-body {
  flex: 1;
  min-width: 0;
}

.notice-request {
  margin-top: var(--space-1);
  font-family: var(--font-outlier);
  font-size: var(--step--1);
  color: var(--color-muted);
}

.retry-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

/* Home */
.home-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 22rem);
  gap: var(--space-6);
  align-items: start;
}

.home-catalog > h1 {
  margin-bottom: var(--space-4);
}

.home-side {
  display: grid;
  gap: var(--space-4);
}

.home-notice {
  margin-bottom: var(--space-4);
}

.concept-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--color-rule);
}

.concept-list-head,
.concept-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 7.5rem 8.5rem;
  gap: var(--space-4);
  align-items: center;
}

.concept-list-head {
  padding: var(--space-2) var(--space-3);
  font-size: var(--step--1);
  color: var(--color-muted);
}

.concept-row {
  min-height: 4.5rem;
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-rule);
  color: var(--color-ink);
  text-decoration: none;
}

a.concept-row:hover {
  background: var(--color-accent-wash);
}

.concept-row.is-current .concept-row-name {
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.25em;
}

.concept-row.is-disabled {
  color: var(--color-muted);
  opacity: 0.7;
  cursor: not-allowed;
}

.concept-row-main {
  display: grid;
  gap: var(--space-1);
  min-width: 0;
}

.concept-row-name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step-2);
}

.concept-row-progress {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  font-size: var(--step--1);
  color: var(--color-muted);
}

.concept-row-score {
  font-variant-numeric: tabular-nums;
  font-weight: 500;
}

.concept-row-score.has-no-record {
  color: var(--color-muted);
  font-weight: 400;
}

.concept-row.is-skeleton {
  pointer-events: none;
}

.concept-row.is-skeleton .skeleton-line:first-child {
  width: 60%;
  height: 1.4rem;
}

.recommend-card .panel-title {
  margin-bottom: var(--space-2);
}

.recommend-card-concept {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step-2);
}

.recommend-card-reason {
  margin: var(--space-2) 0 var(--space-4);
  color: var(--color-ink-2);
}

.recommend-card .key {
  width: 100%;
}

.diagnosis-link {
  width: 100%;
}

/* Reading pages */
.reading-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 20rem);
  gap: var(--space-6);
  align-items: start;
}

.reading-column {
  width: 100%;
  max-width: var(--measure);
  margin-inline: auto;
  min-width: 0;
}

.reading-column > h1 {
  margin-bottom: var(--space-3);
}

.reading-summary {
  margin-bottom: var(--space-5);
  color: var(--color-ink-2);
  font-size: var(--step-1);
}

.concept-cases {
  margin-top: var(--space-6);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-rule);
}

.next-step {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-rule-2);
}

.next-step-title {
  margin-bottom: var(--space-3);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step-1);
}

.next-step-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.summary-card {
  position: sticky;
  top: var(--space-4);
  max-height: calc(100vh - 2rem);
  overflow: auto;
}

.summary-card-body {
  position: relative;
  max-height: 11rem;
  overflow: hidden;
}

.summary-card.is-expanded .summary-card-body {
  max-height: none;
}

.summary-card:not(.is-expanded) .summary-card-body::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3rem;
  background: linear-gradient(to bottom, transparent, var(--color-surface));
}

.summary-card .key {
  margin-top: var(--space-3);
  width: 100%;
}

/* Markdown */
.md {
  overflow-wrap: break-word;
  min-width: 0;
}

.md > * + * {
  margin-top: var(--space-4);
}

.md-heading {
  margin-top: var(--space-6);
}

.md > .md-heading:first-child {
  margin-top: 0;
}

.md .md-heading + * {
  margin-top: var(--space-3);
}

.md-list {
  margin-bottom: 0;
  padding-left: 1.4rem;
}

.md-list li + li {
  margin-top: var(--space-2);
}

.md-inline-code {
  padding: 0.05em 0.35em;
  border-radius: 4px;
  background: var(--color-paper-3);
  font-family: var(--font-outlier);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.md-quote {
  margin-left: 0;
  padding-left: var(--space-4);
  border-left: 2px solid var(--color-rule-2);
  color: var(--color-ink-2);
}

.md-table-wrap {
  overflow-x: auto;
}

.md-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--step--1);
}

.md-table th,
.md-table td {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-rule);
  text-align: left;
  vertical-align: top;
}

.md-table th {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--color-muted);
}

.code-block {
  margin: 0;
  padding: var(--space-4);
  overflow-x: auto;
  background: var(--color-graphite);
  color: var(--color-graphite-ink);
  border-radius: var(--radius-card);
  font-family: var(--font-outlier);
  font-size: var(--step--1);
  line-height: 1.6;
  tab-size: 4;
  max-width: 100%;
}

.code-block code {
  font-family: inherit;
  white-space: pre;
  word-break: normal;
}

.token-keyword {
  color: var(--color-accent-2);
  font-weight: 600;
}

.token-string {
  color: var(--color-syntax-string);
}

.token-number {
  color: var(--color-syntax-number);
}

.token-comment {
  color: var(--color-graphite-muted);
}

/* Quiz */
.quiz-page {
  max-width: 40rem;
  margin: 0 auto;
  padding-bottom: 6rem;
}

.quiz-skip {
  margin-bottom: var(--space-4);
}

.quiz-progress {
  margin-bottom: var(--space-3);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step--1);
  color: var(--color-muted);
}

.quiz-prompt {
  margin-bottom: var(--space-4);
  font-size: var(--step-3);
}

.choice-tray {
  display: grid;
  gap: var(--space-3);
  margin: 0;
  padding: var(--space-3);
  border: 0;
  border-radius: var(--radius-card);
  background: var(--color-paper-3);
}

.choice-key {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 48px;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-rule-2);
  border-radius: var(--radius-input);
  background: var(--color-key-face);
  box-shadow: var(--shadow-key);
  cursor: pointer;
  transition:
    transform var(--dur-micro) ease-out,
    box-shadow var(--dur-micro) ease-out;
}

.choice-key:hover {
  transform: translateY(-1px);
}

.choice-key input {
  position: absolute;
  opacity: 0;
  inset: 0;
  margin: 0;
  cursor: pointer;
}

.choice-key:has(input:checked) {
  transform: translateY(3px);
  box-shadow: var(--shadow-key-press);
  border-color: var(--color-accent);
  background: var(--color-accent-wash);
}

.choice-key:has(input:focus-visible) {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.choice-key.is-locked {
  cursor: default;
  pointer-events: none;
}

.choice-key.is-correct {
  border-color: var(--color-accent);
}

.choice-key.is-wrong {
  border-color: var(--color-error);
  background: var(--color-error-wash);
}

.choice-key-label {
  font-family: var(--font-outlier);
  font-size: var(--step--1);
  color: var(--color-muted);
}

.quiz-short {
  width: 100%;
}

.quiz-feedback {
  margin-top: var(--space-4);
}

.quiz-feedback-head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.quiz-feedback-answer {
  margin-top: var(--space-2);
  font-weight: 500;
}

.quiz-retry {
  margin-top: var(--space-4);
}

.quiz-bar {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 5;
  padding: var(--space-3) var(--space-4);
  background: var(--color-paper);
  border-top: 1px solid var(--color-rule);
}

.quiz-bar-inner {
  max-width: 40rem;
  margin: 0 auto;
}

.quiz-bar .key {
  width: 100%;
}

.quiz-result-count {
  font-family: var(--font-display);
  font-size: var(--step-4);
  margin-block: var(--space-3);
}

.quiz-result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

/* Problem */
.problem-grid {
  display: grid;
  grid-template-columns: minmax(0, 26rem) minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
}

.problem-side {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}

.problem-title {
  font-size: var(--step-4);
}

.stage-tabs {
  display: flex;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
  list-style: none;
  border-bottom: 1px solid var(--color-rule);
}

.stage-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: var(--space-2) var(--space-3);
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  font-family: var(--font-display);
  font-weight: 500;
  cursor: pointer;
}

.stage-tab[aria-selected="true"] {
  border-bottom-color: var(--color-accent);
}

.stage-tab[aria-disabled="true"] {
  color: var(--color-muted);
  cursor: not-allowed;
}

.stage-tab-badge {
  font-size: var(--step--1);
  color: var(--color-muted);
}

.stage-tab-badge.is-accent {
  color: var(--color-accent);
}

.stage-description {
  margin-top: var(--space-3);
  color: var(--color-ink-2);
}

.hint-list {
  margin: 0 0 var(--space-3);
  padding-left: 1.4rem;
}

.hint-list li + li {
  margin-top: var(--space-2);
}

.problem-work {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.editor-toolbar-spacer {
  flex: 1;
}

.language-select {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--step--1);
  color: var(--color-muted);
}

.language-select select {
  min-height: 44px;
  padding: 0 var(--space-3);
  background: var(--color-surface);
  color: var(--color-ink);
}

.editor-frame {
  border: 1px solid var(--color-rule-2);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--color-graphite);
}

.code-editor {
  position: relative;
  height: 22rem;
  background: var(--color-graphite);
  color: var(--color-graphite-ink);
  font-family: var(--font-outlier);
  font-size: var(--step--1);
  line-height: 1.6;
}

.code-editor-highlight,
.code-editor-input {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: var(--space-4);
  border: 0;
  overflow: auto;
  font: inherit;
  line-height: inherit;
  letter-spacing: normal;
  tab-size: 4;
  white-space: pre;
  word-break: normal;
  overflow-wrap: normal;
}

.code-editor-highlight {
  pointer-events: none;
  color: var(--color-graphite-ink);
  scrollbar-width: none;
}

.code-editor-highlight code {
  font: inherit;
}

.code-editor-input {
  resize: none;
  background: transparent;
  color: transparent;
  caret-color: var(--color-graphite-ink);
  outline: none;
}

.code-editor-input::selection {
  background: var(--color-graphite-2);
  color: transparent;
}

.code-editor:focus-within {
  outline: 2px solid var(--color-focus);
  outline-offset: -2px;
}

.result-panel {
  min-height: 12rem;
}

.result-summary {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--step-1);
  margin-bottom: var(--space-3);
}

.case-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.case-row {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-rule);
}

.case-row-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
}

.case-row-name {
  font-family: var(--font-outlier);
  font-size: var(--step--1);
}

.case-row-detail {
  display: grid;
  gap: var(--space-1);
  margin: var(--space-2) 0 0;
  font-size: var(--step--1);
}

.case-row-detail dt {
  color: var(--color-muted);
}

.case-row-detail dd {
  margin: 0 0 var(--space-2);
  font-family: var(--font-outlier);
  overflow-wrap: anywhere;
}

.output-block {
  margin-top: var(--space-4);
}

.output-block .code-block {
  white-space: pre-wrap;
  max-height: 12rem;
  overflow: auto;
}

.result-actions {
  margin-top: var(--space-4);
}

.mobile-guide {
  display: none;
}

.pending-page {
  max-width: var(--measure);
  margin: var(--space-6) auto;
}

.pending-page .key {
  margin-top: var(--space-4);
}

/* Diagnosis */
.diagnosis-page {
  max-width: var(--measure);
  margin: var(--space-5) auto;
}

.diagnosis-top {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.diagnosis-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.diagnosis-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-rule);
}

.diagnosis-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-height: 4rem;
  padding: var(--space-3);
  border-bottom: 1px solid var(--color-rule);
}

.diagnosis-row-name {
  font-family: var(--font-display);
  font-size: var(--step-2);
}

.diagnosis-row-evidence {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  font-size: var(--step--1);
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.diagnosis-text {
  font-size: var(--step-0);
  color: var(--color-ink-2);
}

.diagnosis-text + .diagnosis-text {
  margin-top: var(--space-2);
}

.diagnosis-empty,
.diagnosis-privacy {
  font-size: var(--step--1);
  color: var(--color-muted);
}

.diagnosis-ai {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.diagnosis-ai .divider {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-rule);
}

.diagnosis-ai-slot {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}

@media (max-width: 640px) {
  .diagnosis-page .key {
    width: 100%;
    min-height: 44px;
    justify-content: center;
  }
}

/* Recovery (screen5) and settings (screen7): one narrow column */
.recovery-page,
.settings-page {
  max-width: var(--measure);
  margin: var(--space-6) auto;
}

.settings-page {
  margin-top: var(--space-4);
}

.recovery-lead {
  margin-block: var(--space-3) var(--space-5);
  color: var(--color-ink-2);
}

.recovery-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.recovery-label {
  font-weight: 500;
}

.recovery-input {
  width: 100%;
  font-family: var(--font-outlier);
  font-size: var(--step-0);
}

.recovery-input[readonly] {
  opacity: 0.7;
}

.recovery-error-slot {
  min-height: var(--space-5);
}

.recovery-error {
  color: var(--color-error);
}

.recovery-skip {
  display: inline-block;
  margin-top: var(--space-5);
  padding-block: var(--space-2);
}

.settings-section {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  padding-block: var(--space-5);
  border-top: 1px solid var(--color-rule);
}

.settings-section h2 {
  font-size: var(--step-2);
}

.settings-feedback,
.settings-confirm-slot,
.settings-code-area {
  width: 100%;
}

.settings-feedback:empty,
.settings-confirm-slot:empty {
  display: none;
}

.settings-empty,
.settings-hint {
  color: var(--color-muted);
}

.recovery-code-card {
  margin-bottom: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-graphite);
  color: var(--color-graphite-ink);
  border-radius: var(--cut-l);
}

.recovery-code-value {
  display: block;
  font-family: var(--font-outlier);
  font-size: var(--step-1);
  overflow-wrap: anywhere;
  user-select: all;
}

.recovery-code-note {
  margin-top: var(--space-2);
  font-size: var(--step--1);
  color: var(--color-graphite-muted);
}

.key.is-danger {
  border-color: var(--color-error);
  background: var(--color-error-wash);
  color: var(--color-error);
  box-shadow: 0 3px 0 var(--color-error);
}

.key.is-danger:active {
  box-shadow: var(--shadow-key-press);
}

.danger-confirm {
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-error);
  border-radius: var(--radius-card);
}

.danger-confirm h3 {
  margin-bottom: var(--space-2);
}

.settings-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

@media (max-width: 640px) {
  .recovery-form .key,
  .settings-section > .key,
  .settings-actions .key {
    width: 100%;
  }
}

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

  .home-side {
    order: -1;
  }

  .summary-card {
    position: static;
    max-height: none;
  }
}

@media (max-width: 760px) {
  .app-bar-inner,
  .app-main {
    padding-inline: var(--space-4);
  }

  .app-bar-nav {
    gap: var(--space-3);
  }

  .concept-list-head {
    display: none;
  }

  .concept-row {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .concept-row-score {
    grid-column: 1;
    grid-row: 2;
  }

  .concept-row-state {
    grid-column: 2;
    grid-row: 1;
  }

  h1 {
    font-size: var(--step-4);
  }

  .problem-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .problem-work {
    display: none;
  }

  .mobile-guide {
    display: block;
  }

  .problem-stage-panel,
  .stage-tabs {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .skeleton-line {
    animation: none;
  }

  .key,
  .choice-key {
    transition: none;
  }

  .key:hover,
  .choice-key:hover {
    transform: none;
  }
}