:root {
  color-scheme: light;
  --paper: #f6f2e9;
  --paper-bright: #fffdf8;
  --ink: #18251f;
  --muted: #68736b;
  --line: #e5dfd2;
  --green: #416b4a;
  --green-dark: #31563b;
  --green-wash: #e8efe6;
  --gold: #d6a64b;
  --gold-wash: #f7efd9;
  --red: #a44a3e;
  --red-wash: #f8e9e5;
  --shadow: 0 18px 55px rgba(32, 45, 36, .075);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background-color: var(--paper);
  color: var(--ink);
  background-image: radial-gradient(rgba(65, 107, 74, .11) .7px, transparent .7px);
  background-size: 17px 17px;
}
button, input, textarea { font: inherit; }
button { cursor: pointer; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid rgba(214,166,75,.8); outline-offset: 3px; }
.page-shell { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.topbar { height: 92px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid rgba(104,115,107,.18); }
.brand { color: var(--ink); display: flex; align-items: center; gap: 11px; text-decoration: none; }
.brand-mark { width: 41px; height: 41px; display: grid; place-items: center; color: var(--green); }
.brand-mark svg { width: 36px; height: 36px; }
.brand-copy { display: grid; gap: 2px; line-height: 1.1; }
.brand-copy strong { font-family: Georgia, "Times New Roman", serif; letter-spacing: -.025em; font-size: 17px; }
.brand-copy span { color: var(--muted); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.brand-copy code { color: var(--green); font-size: 10px; letter-spacing: 0; text-transform: none; }
.topbar-note { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 13px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px var(--green-wash); }
#app { min-height: calc(100vh - 156px); outline: none; }
.loading-note { padding: 48px 0; color: var(--muted); }
.site-footer { display: flex; justify-content: space-between; padding: 22px 0 28px; border-top: 1px solid rgba(104,115,107,.18); color: var(--muted); font-size: 10px; letter-spacing: .12em; }
.site-footer span:last-child { letter-spacing: .04em; text-transform: none; font-size: 11px; }

/* Landing */
.landing { padding: 76px 0 86px; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .75fr); align-items: center; gap: clamp(42px, 9vw, 112px); }
.eyebrow, .kicker { color: var(--green); text-transform: uppercase; letter-spacing: .16em; font-weight: 750; font-size: 10px; }
.landing h1, .question-title, .result-title { font-family: Georgia, "Times New Roman", serif; font-weight: 500; letter-spacing: -.045em; }
.landing h1 { margin: 17px 0 18px; max-width: 590px; font-size: clamp(42px, 6.3vw, 72px); line-height: .99; }
.landing h1 em { color: var(--green); font-weight: 400; }
.lead { color: #58645c; max-width: 550px; font-size: 17px; line-height: 1.72; }
.primary-btn, .secondary-btn, .text-btn { border: 0; border-radius: 8px; transition: transform .16s ease, background .16s ease, box-shadow .16s ease; }
.primary-btn { margin-top: 19px; padding: 14px 21px; color: #fff; background: var(--green); font-weight: 720; box-shadow: 0 5px 13px rgba(65,107,74,.17); }
.primary-btn:hover { background: var(--green-dark); transform: translateY(-1px); box-shadow: 0 8px 18px rgba(65,107,74,.22); }
.secondary-btn { padding: 11px 15px; color: var(--ink); border: 1px solid var(--line); background: var(--paper-bright); font-weight: 650; }
.secondary-btn:hover { background: #f7f3eb; }
.text-btn { padding: 9px 0; color: var(--green); background: transparent; font-weight: 700; }
.text-btn:hover { text-decoration: underline; }
.btn-arrow { padding-left: 12px; font-size: 18px; vertical-align: -1px; }
.landing-meta { display: flex; align-items: center; gap: 10px; margin-top: 20px; color: var(--muted); font-size: 12px; }
.landing-meta .divider { width: 3px; height: 3px; background: #a8aa9e; border-radius: 50%; }

.mission-card { position: relative; padding: 28px; border: 1px solid #e4ddce; border-radius: 15px; background: rgba(255,253,248,.88); box-shadow: var(--shadow); transform: rotate(1deg); }
.mission-card::before { content: ""; position: absolute; top: -8px; left: 49%; width: 68px; height: 18px; background: rgba(214,166,75,.36); transform: rotate(-3deg); }
.card-overline { display: flex; align-items: center; justify-content: space-between; padding-bottom: 15px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 10px; letter-spacing: .13em; text-transform: uppercase; }
.card-overline b { color: var(--green); font-size: 11px; }
.mission-card h2 { margin: 20px 0 8px; font: 500 27px/1.2 Georgia, serif; letter-spacing: -.03em; }
.mission-card p { margin: 0 0 18px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.code-note { padding: 14px 16px; color: #e8eee9; background: #202c25; border-radius: 8px; font: 12px/1.8 ui-monospace, SFMono-Regular, Menlo, monospace; }
.code-note .code-comment { color: #9cb19b; }
.mission-points { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 17px; }
.pill { padding: 6px 9px; border: 1px solid var(--line); border-radius: 100px; color: #566259; background: #fffdf8; font-size: 10px; }

/* Practice */
.practice-wrap { width: min(990px, 100%); margin: 0 auto; padding: 38px 0 64px; }
.practice-topline { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 27px; }
.back-link { border: 0; padding: 4px 0; color: var(--muted); background: transparent; font-size: 12px; }
.back-link:hover { color: var(--ink); }
.progress-label { display: flex; justify-content: space-between; margin-bottom: 9px; color: var(--muted); font-size: 11px; }
.progress-label strong { color: var(--ink); font-weight: 700; }
.progress-track { width: min(270px, 38vw); height: 5px; overflow: hidden; border-radius: 99px; background: #e3dfd5; }
.progress-fill { height: 100%; border-radius: inherit; background: var(--green); transition: width .24s ease; }
.question-layout { display: grid; grid-template-columns: minmax(0,1fr) 238px; align-items: start; gap: 26px; }
.question-card { overflow: hidden; border: 1px solid #e5dfd2; border-radius: 13px; background: var(--paper-bright); box-shadow: var(--shadow); animation: arrive .22s ease both; }
.question-head { position: relative; padding: 30px 34px 23px; border-bottom: 1px solid var(--line); background-image: linear-gradient(transparent 31px, rgba(104,115,107,.08) 32px); background-size: 100% 32px; }
.question-number { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 14px; color: var(--green); font-size: 10px; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
.number-tab { display: inline-grid; place-items: center; min-width: 27px; height: 25px; padding: 0 7px; border: 1px solid #d7e0d3; border-radius: 5px; background: var(--green-wash); font-family: ui-monospace, monospace; }
.question-title { margin: 0; font-size: clamp(26px, 3.5vw, 37px); line-height: 1.14; }
.question-prompt { max-width: 660px; margin: 11px 0 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.question-body { padding: 25px 34px 29px; }
.answer-label { display: block; margin-bottom: 11px; font-size: 12px; font-weight: 760; }
.answer-hint { margin: -4px 0 13px; color: var(--muted); font-size: 12px; line-height: 1.55; }
.options { display: grid; gap: 9px; }
.option { display: flex; align-items: flex-start; gap: 11px; padding: 13px 14px; border: 1px solid var(--line); border-radius: 8px; background: #fff; cursor: pointer; transition: border .15s ease, background .15s ease; }
.option:hover { border-color: #a6b8a3; background: #fbfcf8; }
.option:has(input:checked) { border-color: var(--green); background: #f0f5ed; box-shadow: inset 0 0 0 1px var(--green); }
.option input { margin: 3px 0 0; accent-color: var(--green); }
.option span { font-size: 13px; line-height: 1.55; }
.answer-input, .spoken-input { width: 100%; border: 1px solid #dcd8ce; border-radius: 8px; color: var(--ink); background: #fff; transition: border .15s ease, box-shadow .15s ease; }
.answer-input { padding: 13px 15px; font-size: 15px; }
.spoken-input { min-height: 86px; padding: 12px 14px; resize: vertical; font-size: 13px; line-height: 1.6; }
.answer-input:focus, .spoken-input:focus { border-color: var(--green); outline: none; box-shadow: 0 0 0 3px rgba(65,107,74,.11); }
.spoken-practice { margin-top: 20px; }
.spoken-practice summary { color: var(--green); cursor: pointer; font-size: 12px; font-weight: 700; }
.spoken-practice summary:hover { text-decoration: underline; }
.spoken-practice .spoken-input { margin-top: 11px; }
.checklist { display: grid; gap: 9px; margin-top: 14px; }
.check-row { display: flex; align-items: flex-start; gap: 10px; color: #3e4a42; font-size: 13px; line-height: 1.5; cursor: pointer; }
.check-row input { margin-top: 3px; accent-color: var(--green); }
.feedback { margin-top: 20px; padding: 16px 17px; border-left: 3px solid var(--green); border-radius: 0 8px 8px 0; background: var(--green-wash); animation: arrive .2s ease both; }
.feedback.is-wrong { border-left-color: var(--red); background: var(--red-wash); }
.feedback.is-revealed { border-left-color: var(--gold); background: var(--gold-wash); }
.feedback h3 { margin: 0 0 5px; font-size: 13px; }
.feedback p { margin: 0; color: #4d5a50; font-size: 12px; line-height: 1.65; }
.model-answer { margin-top: 12px !important; padding-top: 12px; border-top: 1px solid rgba(24,37,31,.13); color: var(--ink) !important; }
.model-answer strong { color: var(--green-dark); }
.question-actions { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 23px; }
.action-right { display: flex; align-items: center; gap: 17px; }
.primary-btn.compact { margin: 0; padding: 12px 17px; font-size: 13px; }
.secondary-btn.compact { padding: 11px 14px; font-size: 12px; }
.text-btn.compact { font-size: 12px; }
.action-status { min-height: 17px; margin-top: 10px; color: var(--red); font-size: 11px; }

.reference-card { padding: 20px 18px; border: 1px solid #e5dfd2; border-radius: 11px; background: rgba(255,253,248,.75); }
.reference-card h3 { margin: 0 0 15px; font: 500 18px Georgia, serif; }
.reference-code { margin: 0; padding: 11px 10px; overflow-wrap: anywhere; border-radius: 6px; color: #e8eee9; background: #202c25; font: 10px/1.8 ui-monospace, SFMono-Regular, Menlo, monospace; }
.reference-card p { margin: 12px 0 0; color: var(--muted); font-size: 11px; line-height: 1.65; }
.reference-rule { display: block; margin-top: 15px; padding-top: 13px; border-top: 1px solid var(--line); color: var(--green); font-size: 11px; font-weight: 700; line-height: 1.55; }

/* Finish */
.results-wrap { width: min(900px, 100%); margin: 0 auto; padding: 58px 0 72px; }
.results-hero { padding: 34px; border: 1px solid #e5dfd2; border-radius: 14px; background: var(--paper-bright); box-shadow: var(--shadow); }
.result-title { margin: 9px 0 10px; font-size: clamp(35px,5vw,54px); line-height: 1.05; }
.results-intro { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.score-row { display: flex; align-items: center; gap: 17px; margin-top: 23px; }
.score-number { color: var(--green); font: 500 39px Georgia, serif; }
.score-caption { color: var(--muted); font-size: 12px; line-height: 1.55; }
.review-panel { margin-top: 22px; padding: 23px 27px; border: 1px solid #e5dfd2; border-radius: 12px; background: rgba(255,253,248,.83); }
.review-panel h2 { margin: 0 0 14px; font: 500 23px Georgia, serif; }
.review-list { display: grid; }
.review-item { display: grid; grid-template-columns: 26px 1fr auto; align-items: center; gap: 10px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.review-item:last-child { border-bottom: 0; }
.review-icon { display: grid; place-items: center; width: 23px; height: 23px; border-radius: 50%; color: var(--green); background: var(--green-wash); font-size: 12px; font-weight: 800; }
.review-icon.wrong { color: var(--red); background: var(--red-wash); }
.review-icon.revealed { color: #88631e; background: var(--gold-wash); }
.review-text strong { display: block; font-size: 12px; }
.review-text small { display: block; margin-top: 3px; color: var(--muted); font-size: 11px; }
.review-status { color: var(--muted); font-size: 10px; white-space: nowrap; }
.results-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
.encouragement { margin-top: 15px; padding: 14px 16px; color: #435247; border-radius: 8px; background: var(--green-wash); font-size: 12px; line-height: 1.6; }

@keyframes arrive { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; } }
@media (max-width: 760px) {
  .page-shell { width: min(100% - 32px, 600px); }
  .topbar { height: 76px; }
  .topbar-note { max-width: 142px; font-size: 10px; line-height: 1.4; }
  .landing { padding: 48px 0 56px; grid-template-columns: 1fr; gap: 37px; }
  .landing h1 { max-width: 520px; font-size: clamp(43px, 11vw, 66px); }
  .mission-card { width: min(100%, 440px); justify-self: center; }
  .practice-wrap { padding: 26px 0 42px; }
  .question-layout { grid-template-columns: 1fr; }
  .reference-card { display: none; }
  .question-head { padding: 24px 22px 19px; }
  .question-body { padding: 22px; }
  .practice-topline { margin-bottom: 19px; }
  .progress-track { width: min(190px, 40vw); }
  .question-actions { align-items: flex-start; }
  .action-right { gap: 11px; }
  .results-wrap { padding: 38px 0 52px; }
  .results-hero { padding: 25px; }
  .review-panel { padding: 20px; }
}
@media (max-width: 430px) {
  .page-shell { width: calc(100% - 26px); }
  .brand-copy strong { font-size: 15px; }
  .brand-copy span { font-size: 9px; }
  .topbar-note { max-width: 115px; text-align: right; }
  .site-footer { font-size: 8px; letter-spacing: .08em; }
  .site-footer span:last-child { font-size: 9px; }
  .question-title { font-size: 27px; }
  .question-actions { gap: 8px; }
  .primary-btn.compact { padding: 11px 13px; }
  .secondary-btn.compact { padding: 10px; }
  .action-right { gap: 9px; }
  .review-item { grid-template-columns: 24px 1fr; }
  .review-status { grid-column: 2; }
}