:root {
  color-scheme: light;
  --ink: #171821;
  --muted: #596579;
  --soft: #f6f7fb;
  --panel: #fff;
  --line: #d9e0ea;
  --line-strong: #bfc9d7;
  --blue: #4458c9;
  --blue-dark: #28378f;
  --green: #087367;
  --green-soft: #edf6f3;
  --amber: #925400;
  --rose: #ab354e;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(20, 24, 34, .1);
  --ease: cubic-bezier(.16, 1, .3, 1);
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Arial, sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scrollbar-color: #bfc9d7 var(--soft); scrollbar-width: thin; }
body { margin: 0; color: var(--ink); background: var(--soft); font-size: 15px; line-height: 1.6; }
button, input, select, textarea { font: inherit; }
button, a, input, textarea, select { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button, .button { min-height: 44px; border: 0; border-radius: 10px; padding: 11px 18px; color: #fff; background: var(--green); font-weight: 650; text-decoration: none; display: inline-flex; align-items: center; justify-content: center; gap: 8px; line-height: 1.35; transition: background 160ms, transform 160ms var(--ease); }
button:hover:not(:disabled), .button:hover { background: #065b52; }
button:active:not(:disabled), .button:active { transform: translateY(1px); }
button:disabled { cursor: wait; opacity: .58; }
button.secondary, .button.secondary { background: #edf0f5; color: #263145; }
button.secondary:hover:not(:disabled), .button.secondary:hover { background: #e1e7f0; }
button.quiet, .button.quiet { color: var(--green); background: transparent; padding-left: 0; padding-right: 0; }
button.quiet:hover:not(:disabled), .button.quiet:hover { color: #064e46; background: transparent; }
button.danger { color: var(--rose); background: #f8eaf0; }
a { color: var(--green); text-underline-offset: 4px; }
a:hover { color: #064e46; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
::selection { background: #cbe8df; color: #073e37; }
input, textarea { caret-color: var(--green); }
[hidden] { display: none !important; }
h1, h2, h3, h4 { line-height: 1.2; text-wrap: balance; }
h1 { font-size: clamp(28px, 3vw, 38px); letter-spacing: -.025em; margin: 0 0 14px; font-weight: 700; }
h2 { font-size: 23px; letter-spacing: -.015em; margin: 0 0 12px; }
h3 { font-size: 18px; margin: 0 0 10px; }
p { margin: 0 0 14px; max-width: 70ch; }
ul, ol { padding-left: 22px; }
svg { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.skip-link { position: fixed; top: -80px; left: 16px; z-index: 50; background: var(--panel); padding: 10px 16px; border-radius: 8px; }
.skip-link:focus { top: 8px; }
.app-shell { min-height: 100svh; display: grid; grid-template-columns: 184px minmax(0, 1fr); grid-template-rows: 82px 1fr auto; max-width: 1440px; margin: auto; }
.app-header { grid-column: 1 / -1; display: flex; align-items: center; gap: 24px; padding: 18px 34px; border-bottom: 1px solid var(--line); }
.brand { font-size: 25px; color: var(--ink); text-decoration: none; font-weight: 720; display: inline-flex; align-items: center; gap: 11px; letter-spacing: -.02em; }
.brand-mark { height: 29px; width: 26px; display: flex; align-items: center; gap: 4px; }
.brand-mark i { height: 14px; width: 5px; border-radius: 3px; background: var(--green); }
.brand-mark i:nth-child(2) { height: 26px; }
.brand-mark i:nth-child(3) { height: 20px; }
.header-description { margin-left: 22px; font-size: 13px; color: var(--muted); }
.account-links { margin-left: auto; display: flex; align-items: center; gap: 16px; font-size: 13px; }
.account-links button { font-size: 13px; font-weight: 600; }
.connection-label { color: var(--muted); }
.main-navigation { display: flex; flex-direction: column; gap: 7px; padding: 34px 16px 34px 22px; align-self: start; position: sticky; top: 0; }
.main-navigation a { display: flex; align-items: center; gap: 11px; color: var(--muted); text-decoration: none; padding: 12px 14px; border-radius: 10px; font-size: 14px; font-weight: 600; min-height: 47px; }
.main-navigation a:hover { background: #e9edf3; color: var(--ink); }
.main-navigation a[aria-current="page"] { color: var(--green); background: #e4efe9; }
.main-navigation svg { width: 20px; height: 20px; flex: none; }
main { padding: 46px 56px 64px 36px; min-width: 0; width: 100%; max-width: 1120px; }
main:focus { outline: none; }
.app-footer { grid-column: 2; display: flex; justify-content: space-between; gap: 20px; padding: 20px 56px 28px 36px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.app-footer span { max-width: 65ch; }
.page-intro { margin-bottom: 34px; }
.page-intro p { color: var(--muted); font-size: 16px; }
.page-intro.with-action { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.page-intro.with-action > div { min-width: 0; }
.surface { background: var(--panel); border-radius: var(--radius); padding: 30px 32px; }
.learning-hero { margin-bottom: 36px; background: #fff; border-radius: var(--radius); padding: 32px; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 26px; align-items: center; }
.learning-hero h2 { font-size: 27px; margin: 10px 0 14px; }
.learning-hero p { margin-bottom: 20px; color: var(--muted); }
.learning-hero .hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; }
.session-marker { color: var(--green); font-size: 13px; font-weight: 650; display: inline-flex; gap: 8px; align-items: center; }
.session-marker::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
.hero-note { font-size: 13px; color: var(--muted); max-width: 190px; padding: 18px 0 18px 26px; border-left: 1px solid var(--line); }
.preparation-status { display: flex; align-items: flex-start; gap: 15px; }
.preparation-status .loading-indicator { margin-top: 3px; }
.preparation-status strong { display: block; margin-bottom: 6px; }
.preparation-status p { font-size: 14px; }
.batch-panel { display: flex; justify-content: space-between; align-items: center; gap: 30px; padding: 22px 25px; border: 1px solid var(--line); border-radius: 12px; margin: 0 0 30px; }
.batch-panel h2 { font-size: 17px; margin-bottom: 9px; }
.batch-panel p { font-size: 13px; color: var(--muted); margin: 0; }
.batch-panel p + p { margin-top: 10px; }
.batch-panel .inline-error { color: #a2243b; }
.batch-actions { display: flex; flex-direction: column; align-items: center; gap: 13px; flex: none; }
.batch-actions button { font-size: 13px; }
.batch-actions a { font-size: 12px; }
.focus-list { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.focus-list:has(> :only-child) { grid-template-columns: minmax(0, 1fr); }
.focus-card { padding: 24px 25px; border-radius: 12px; background: var(--panel); display: flex; flex-direction: column; min-width: 0; }
.focus-card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 17px; }
.focus-card h3 { font-size: 20px; }
.focus-card > p { font-size: 14px; }
.focus-card > .evidence-note { font-size: 12px; margin-bottom: 20px; }
.focus-card-footer { margin-top: auto; padding-top: 15px; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.focus-card-footer button, .focus-card-footer a { font-size: 13px; flex: none; }
.focus-summary { color: var(--muted); font-size: 13px; margin-top: 18px; }
.focus-empty { padding: 18px 0; }
.focus-empty p { font-size: 14px; }
.starter-resources { border-top: 1px solid var(--line); padding-top: 24px; margin-top: 35px; }
.starter-resources > .evidence-note { margin-top: 15px; }
.starter-resources .lesson-list h3 { font-size: 16px; }
.pattern-group { margin-top: 30px; }
.pattern-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 13px; }
.pattern-row h3 { font-size: 21px; }
.pattern-definition { display: grid; grid-template-columns: 115px minmax(0, 1fr); gap: 12px 18px; font-size: 14px; margin: 20px 0; }
.pattern-definition dt { font-weight: 650; }
.pattern-definition dd { margin: 0; }
.pattern-evidence-list { list-style: none; padding: 0; margin: 20px 0 0; }
.pattern-evidence { padding: 18px 0; border-top: 1px solid var(--line); }
.pattern-evidence .evidence-line { font-size: 12px; gap: 6px 12px; }
.pattern-evidence blockquote { margin: 14px 0; padding-left: 16px; border-left: 2px solid #b0c8be; white-space: pre-wrap; overflow-wrap: anywhere; color: #35445b; font-size: 15px; }
.pattern-evidence p { margin-bottom: 9px; }
.batch-history { margin-top: 30px; padding-top: 23px; border-top: 1px solid var(--line); }
.batch-history .material-list { margin-top: 20px; }
.capture-context { margin: 0 0 24px; }
.capture-context .field { margin-top: 15px; }
.capture-status { margin: 17px 0 20px; }
.capture-status .evidence-note + .evidence-note { margin-top: 7px; }
.capture-queue { margin: 22px 0; }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin: 34px 0 16px; }
.section-heading h2 { margin: 0; }
.section-heading a { font-size: 13px; }
.lesson-list, .pattern-list, .history-list, .material-list { list-style: none; padding: 0; margin: 0; }
.lesson-list li { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.lesson-list li:first-child { padding-top: 12px; }
.lesson-list h3 { margin-bottom: 7px; }
.lesson-list p { margin: 0; color: var(--muted); font-size: 14px; }
.lesson-list button { white-space: nowrap; min-width: 103px; }
.evidence-caption { font-size: 12px; color: var(--muted); }
.status-banner, .error-box { padding: 17px 20px; border-radius: 11px; margin-bottom: 24px; background: var(--green-soft); color: #185d51; }
.status-banner p, .error-box p { margin-bottom: 0; }
.status-banner.warning { background: #fcf2df; color: #76501a; }
.error-box { background: #fceef0; color: #8d273b; }
.error-box h2 { font-size: 20px; }
.error-box button { margin-top: 18px; }
.inline-error { color: #a2243b; font-size: 14px; margin-top: 12px; }
.empty-state { padding: 28px 0; }
.empty-state p { color: var(--muted); }
.empty-state h2 { margin-bottom: 10px; }
.initial-loading, .loading-state { min-height: 250px; display: flex; align-items: center; justify-content: center; gap: 12px; color: var(--muted); }
.auth-form { max-width: 430px; margin-top: 30px; }
.auth-form > button { min-width: 140px; }
.auth-note { margin-top: 25px; font-size: 13px; color: var(--muted); }
.loading-indicator { width: 18px; height: 18px; border: 2px solid #cdd8dc; border-top-color: var(--green); border-radius: 50%; animation: spin .85s linear infinite; flex: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.capture-layout { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 36px; }
.capture-form { min-width: 0; }
.field { display: block; margin-bottom: 22px; }
.field > span, .field > label { display: block; font-weight: 650; margin-bottom: 8px; }
.field input, .field select, .field textarea { width: 100%; padding: 12px 13px; color: var(--ink); background: #fff; border: 1px solid var(--line-strong); border-radius: 9px; line-height: 1.5; }
.field textarea { min-height: 196px; resize: vertical; }
.field textarea::placeholder, .field input::placeholder { color: #647087; opacity: 1; }
.field small { display: block; margin-top: 8px; color: var(--muted); font-size: 12px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.check-field { display: flex; align-items: flex-start; gap: 11px; font-size: 14px; margin: 0 0 24px; }
.check-field input { height: 18px; width: 18px; accent-color: var(--green); margin-top: 3px; flex: none; }
.form-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; }
.save-state { color: var(--muted); font-size: 13px; }
.capture-aside { padding-top: 4px; }
.capture-aside h2 { font-size: 17px; margin-bottom: 14px; }
.capture-aside p { color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.capture-aside .send-boundary { padding-top: 21px; margin-top: 22px; border-top: 1px solid var(--line); }
.source-chip, .tag { display: inline-block; color: #395063; background: #eaf0f5; border-radius: 5px; padding: 3px 8px; font-size: 12px; line-height: 1.6; }
.tag.green { color: #145e50; background: #e2f1ea; }
.tag.warning { color: #795315; background: #fbefd7; }
.saved-result { margin-top: 34px; padding-top: 28px; border-top: 1px solid var(--line); }
.saved-result h2 { font-size: 21px; }
.text-original, .text-corrected { white-space: pre-wrap; overflow-wrap: anywhere; max-width: 75ch; }
.text-corrected { background: #edf6f3; padding: 18px 20px; border-radius: 10px; color: #164c41; }
.pattern-row { padding: 26px 0; border-bottom: 1px solid var(--line); }
.pattern-row:first-child { padding-top: 0; }
.pattern-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; }
.pattern-heading h2 { margin-bottom: 9px; font-size: 21px; }
.pattern-summary { color: var(--muted); margin-bottom: 15px; font-size: 14px; }
.evidence-line { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 20px; font-size: 13px; font-variant-numeric: tabular-nums; }
.evidence-line strong { color: var(--green); font-size: 15px; }
.evidence-note { color: var(--muted); font-size: 12px; margin: 8px 0 0; }
details { margin-top: 16px; }
summary { cursor: pointer; color: var(--green); font-size: 14px; width: fit-content; padding: 3px 0; }
details p, details li { font-size: 14px; }
.lesson-topline { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 22px; }
.lesson-topline a { font-size: 13px; }
.lesson-stage { display: flex; gap: 5px; margin: 0 0 34px; list-style: none; padding: 0; }
.lesson-stage li { flex: 1; color: var(--muted); border-top: 3px solid #dbe3e9; padding-top: 10px; font-size: 12px; }
.lesson-stage li.current { color: var(--green); border-top-color: var(--green); font-weight: 700; }
.lesson-stage li.complete { border-top-color: #90bcae; color: #39695b; }
.lesson-body { max-width: 750px; }
.lesson-explanation + .lesson-explanation { margin-top: 40px; padding-top: 30px; border-top: 1px solid var(--line); }
.lesson-body h1 { font-size: 30px; }
.lesson-body .lesson-introduction { font-size: 17px; color: #35445b; }
.rule-block { font-size: 22px; font-weight: 650; line-height: 1.45; background: var(--green-soft); border-radius: 10px; padding: 21px 24px; margin: 24px 0; color: #174c41; }
.example-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin: 25px 0 30px; }
.example-pair h3 { font-size: 13px; color: var(--muted); margin-bottom: 10px; font-weight: 600; }
.example-pair p { margin-bottom: 8px; overflow-wrap: anywhere; }
.example-pair .incorrect { color: #9c3d4f; }
.example-pair .correct { color: var(--green); }
.lesson-body details { margin-bottom: 28px; }
.lesson-body details[open] { padding-bottom: 10px; }
.lesson-body details p { margin-top: 12px; color: #35445b; }
.lesson-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; padding-top: 22px; margin-top: 28px; border-top: 1px solid var(--line); }
.lesson-actions small { color: var(--muted); font-size: 12px; }
.question-prompt { margin: 24px 0; font-size: 21px; line-height: 1.55; color: #253447; }
.question-context { color: var(--muted); font-size: 14px; }
.answer-choices { display: grid; gap: 10px; margin-bottom: 24px; }
.answer-choice { display: flex; align-items: flex-start; gap: 12px; padding: 14px 16px; border: 1px solid var(--line-strong); border-radius: 9px; cursor: pointer; background: #fff; }
.answer-choice input { accent-color: var(--green); margin-top: 6px; width: 17px; height: 17px; flex: none; }
.answer-choice:has(input:checked) { border-color: var(--green); background: var(--green-soft); }
.answer-field textarea { min-height: 130px; }
.answer-field textarea:read-only { color: #4d5b6c; background: #f3f5f8; }
.hint-content { padding: 16px 18px; background: #fcf2df; color: #775219; border-radius: 9px; font-size: 14px; margin: 14px 0 24px; }
.feedback { margin-top: 30px; border-radius: 11px; background: #edf6f3; padding: 25px 26px; color: #174c41; }
.feedback.needs-work { background: #fbf0df; color: #6d4c1c; }
.feedback.uncertain { background: #edf0fa; color: #354781; }
.feedback h2 { font-size: 20px; margin-bottom: 13px; }
.feedback p:last-child { margin-bottom: 0; }
.feedback-dimensions { display: flex; flex-wrap: wrap; gap: 9px 18px; margin: 14px 0; font-size: 13px; }
.feedback-dimensions span { display: flex; align-items: center; gap: 5px; }
.reference-answer { margin-top: 20px; padding-top: 18px; border-top: 1px solid currentColor; }
.reference-answer strong { font-size: 13px; display: block; margin-bottom: 7px; }
.attempt-note { color: var(--muted); font-size: 12px; margin-top: 14px; }
.attempt-review[open] { padding-top: 4px; }
.attempt-review > p { margin-top: 15px; }
.attempt-review form { margin-top: 20px; }
.completed-lesson { max-width: 700px; }
.completed-lesson .completion-mark { width: 44px; height: 44px; color: var(--green); margin-bottom: 21px; }
.completed-lesson h1 { margin-bottom: 17px; }
.completion-review { background: var(--green-soft); padding: 22px 24px; border-radius: 10px; margin: 26px 0; }
.completion-review p { margin: 0; color: #174c41; }
.history-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.history-controls input { flex: 1; min-width: 180px; min-height: 44px; border: 1px solid var(--line-strong); border-radius: 9px; padding: 10px 13px; }
.sub-navigation { display: flex; gap: 24px; border-bottom: 1px solid var(--line); margin-bottom: 28px; }
.sub-navigation button { background: none; color: var(--muted); border-radius: 0; padding: 10px 0 14px; font-weight: 600; border-bottom: 2px solid transparent; }
.sub-navigation button[aria-pressed="true"] { color: var(--green); border-bottom-color: var(--green); }
.history-list li, .material-list li { border-bottom: 1px solid var(--line); padding: 22px 0; }
.history-list li:first-child, .material-list li:first-child { padding-top: 0; }
.history-entry-head { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-bottom: 11px; font-size: 12px; color: var(--muted); }
.history-entry-copy { margin: 0 0 12px; overflow-wrap: anywhere; }
.history-item-actions { display: flex; gap: 19px; flex-wrap: wrap; }
.history-item-actions button { min-height: 36px; font-size: 13px; }
.history-detail-copy { padding: 16px 18px; background: #fff; border-radius: 9px; margin-top: 15px; }
.history-detail-copy h3 { font-size: 14px; }
.recovery-section { padding-top: 28px; margin-top: 40px; border-top: 1px solid var(--line); }
.recovery-section p { color: var(--muted); font-size: 14px; }
.recovery-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; }
.file-label { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; border-radius: 10px; padding: 11px 18px; color: #263145; background: #edf0f5; cursor: pointer; font-weight: 650; font-size: 15px; }
.file-label:hover { background: #e1e7f0; }
.file-label input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.file-label:focus-within { outline: 3px solid var(--blue); outline-offset: 3px; }
.settings-section { margin-bottom: 38px; padding-bottom: 30px; border-bottom: 1px solid var(--line); }
.settings-section:last-child { border-bottom: 0; }
.settings-section p { color: var(--muted); }
.settings-line { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.settings-line:last-child { border-bottom: 0; }
.settings-line span { color: var(--muted); }
.settings-section .field { max-width: 600px; margin-top: 20px; }
.notification { position: fixed; right: 24px; bottom: 24px; max-width: min(440px, calc(100vw - 40px)); color: #fff; background: #213e38; border-radius: 10px; padding: 15px 20px; box-shadow: var(--shadow); font-size: 14px; z-index: 30; }
.notification.error { background: #8d273b; }
.entry-animation { animation: lesson-enter 430ms var(--ease); }
@keyframes lesson-enter { from { clip-path: inset(0 0 5% 0); opacity: .8; } to { clip-path: inset(0); opacity: 1; } }
.numeric { font-variant-numeric: tabular-nums; }
@media (min-width: 1500px) { .app-shell { border-left: 1px solid var(--line); border-right: 1px solid var(--line); } }
@media (max-width: 1050px) {
  .app-shell { grid-template-columns: 158px minmax(0, 1fr); }
  .app-header { padding-left: 25px; padding-right: 25px; }
  .header-description { margin-left: 0; }
  main { padding: 36px 30px 48px 22px; }
  .app-footer { padding-left: 22px; padding-right: 30px; }
  .capture-layout { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .capture-aside { padding-top: 24px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .capture-aside .send-boundary { border: 0; margin: 0; padding: 0; }
  .hero-note { max-width: 160px; }
  .focus-list { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 700px) {
  .app-shell { display: flex; flex-direction: column; }
  .app-header { min-height: 73px; padding: 16px 22px; gap: 15px; }
  .brand { font-size: 24px; }
  .header-description { display: none; }
  .account-links { gap: 10px; font-size: 12px; }
  .main-navigation { flex-direction: row; align-self: stretch; min-width: 0; padding: 9px 14px; gap: 4px; background: var(--soft); z-index: 10; border-bottom: 1px solid var(--line); }
  .main-navigation a { justify-content: center; flex: 1; padding: 10px 7px; gap: 7px; min-height: 44px; font-size: 13px; }
  .main-navigation svg { width: 17px; height: 17px; }
  main { max-width: none; padding: 29px 22px 44px; flex: 1; }
  h1 { font-size: 28px; }
  h2 { font-size: 22px; }
  .page-intro { margin-bottom: 25px; }
  .page-intro p { font-size: 14px; }
  .page-intro.with-action { display: block; }
  .page-intro.with-action .button { margin-top: 5px; }
  .surface { padding: 24px 22px; }
  .learning-hero { padding: 25px 23px; grid-template-columns: 1fr; gap: 0; margin-bottom: 30px; }
  .learning-hero h2 { font-size: 25px; }
  .learning-hero .hero-actions { gap: 15px; }
  .learning-hero .hero-actions > button { width: 100%; }
  .hero-note { max-width: none; border-left: 0; border-top: 1px solid var(--line); padding: 16px 0 0; margin-top: 23px; }
  .batch-panel { display: block; padding: 21px 22px; margin-bottom: 25px; }
  .batch-actions { margin-top: 19px; align-items: flex-start; }
  .batch-actions button { width: 100%; }
  .focus-card { padding: 22px; }
  .focus-card h3 { font-size: 18px; }
  .focus-card-footer { flex-wrap: wrap; }
  .pattern-definition { grid-template-columns: 1fr; gap: 5px; }
  .pattern-definition dd { margin-bottom: 12px; }
  .section-heading { margin-top: 29px; }
  .section-heading h2 { font-size: 21px; }
  .lesson-list li { gap: 18px; padding: 21px 0; }
  .lesson-list h3 { font-size: 16px; }
  .lesson-list p { font-size: 13px; }
  .lesson-list button { min-width: 73px; padding: 10px 13px; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .capture-aside { display: block; }
  .capture-aside .send-boundary { margin-top: 25px; }
  .form-actions > button { width: 100%; }
  .pattern-heading { gap: 16px; }
  .pattern-heading h2 { font-size: 19px; }
  .pattern-heading button { padding: 10px 12px; min-width: 72px; }
  .evidence-line { gap: 5px 14px; }
  .lesson-topline { margin-bottom: 20px; }
  .lesson-stage { gap: 4px; margin-bottom: 28px; }
  .lesson-stage li { font-size: 11px; line-height: 1.5; }
  .lesson-body h1 { font-size: 27px; }
  .lesson-body .lesson-introduction { font-size: 16px; }
  .rule-block { padding: 19px 20px; font-size: 20px; }
  .example-pair { grid-template-columns: 1fr; gap: 17px; }
  .question-prompt { font-size: 19px; }
  .lesson-actions { gap: 12px; }
  .lesson-actions > button:first-child { width: 100%; }
  .feedback { padding: 22px 20px; }
  .history-controls button { padding-left: 14px; padding-right: 14px; }
  .history-entry-head { align-items: flex-start; }
  .history-item-actions { gap: 13px; }
  .recovery-actions { gap: 12px; }
  .app-footer { padding: 20px 22px 28px; flex-direction: column; gap: 10px; }
  .notification { bottom: 18px; right: 20px; }
}
@media (max-width: 420px) {
  .main-navigation a { flex-direction: column; min-width: 0; gap: 4px; }
}
@media (max-width: 370px) {
  main { padding-left: 17px; padding-right: 17px; }
  .main-navigation a { font-size: 12px; }
  .account-links .connection-label { display: none; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }