:root {
  --paper: #f8f3e8;
  --paper-deep: #eee6d6;
  --ink: #25312d;
  --muted: #727a73;
  --forest: #226050;
  --forest-dark: #18483c;
  --coral: #f2765a;
  --sun: #f3bd4e;
  --line: rgba(37, 49, 45, .14);
  --white: #fffdf8;
  --success: #23855e;
  --success-soft: #e3f5ea;
  --error: #d95d55;
  --error-soft: #fce8e4;
  --shadow: 0 18px 50px rgba(56, 48, 34, .10);
  --radius-lg: 28px;
  --radius-md: 19px;
}

* { box-sizing: border-box; }

html { min-height: 100%; background: var(--paper); }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 16%, rgba(242, 118, 90, .09), transparent 23rem),
    radial-gradient(circle at 90% 78%, rgba(34, 96, 80, .08), transparent 26rem),
    var(--paper);
  font-family: ui-rounded, "SF Pro Rounded", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }

.ambient {
  position: fixed;
  z-index: -1;
  border: 1px solid rgba(34, 96, 80, .12);
  border-radius: 999px 999px 24px 999px;
  transform: rotate(18deg);
}

.ambient-one { width: 92px; height: 154px; left: -35px; top: 35%; }
.ambient-two { width: 70px; height: 116px; right: -23px; top: 14%; transform: rotate(-28deg); }

.topbar {
  width: min(1180px, calc(100% - 48px));
  height: 94px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { display: inline-flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand-mark { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 15px; background: var(--forest); box-shadow: 0 8px 18px rgba(34,96,80,.2); }
.brand-mark svg { width: 34px; fill: #f7d478; }
.brand-mark .face { fill: none; stroke: var(--forest); stroke-width: 2.2; stroke-linecap: round; }
.brand-copy { display: grid; line-height: 1; gap: 5px; }
.brand-copy strong { font-size: 18px; letter-spacing: .06em; }
.brand-copy small { font-size: 9px; letter-spacing: .28em; color: var(--muted); font-weight: 800; }

.topbar-actions { display: flex; align-items: center; gap: 12px; }
.streak-pill { height: 42px; padding: 0 15px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,253,248,.72); display: flex; align-items: center; gap: 8px; font-size: 13px; }
.streak-pill strong { font-size: 15px; }

.icon-button, .speak-button {
  border: 0;
  cursor: pointer;
  display: grid;
  place-items: center;
  color: var(--forest);
  transition: transform .2s, background .2s;
}

.icon-button { width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 50%; background: rgba(255,253,248,.72); }
.icon-button:hover, .speak-button:hover { transform: translateY(-2px); }
.icon-button svg, .speak-button svg { width: 21px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.sound-off { display: none; }
.icon-button[aria-pressed="false"] .sound-on { display: none; }
.icon-button[aria-pressed="false"] .sound-off { display: block; }

main { width: min(1080px, calc(100% - 48px)); margin: 0 auto; padding: 18px 0 150px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.garden-home { animation: screen-in .42s ease both; }
.garden-card { position: relative; display: grid; grid-template-columns: minmax(286px, .78fr) minmax(540px, 1.65fr); gap: 30px; min-height: 530px; padding: 28px; overflow: hidden; border-radius: 32px; color: #f9f7ff; background: #1a1a1a; box-shadow: 0 25px 60px rgba(21,18,56,.22); user-select: none; }
.garden-copy { position: relative; z-index: 2; align-self: center; }
.garden-copy .eyebrow { color: rgba(255,255,255,.62); }
.garden-title { margin: 10px 0 13px; color: #fff; font-size: clamp(35px, 4vw, 50px); line-height: 1.13; font-weight: 800; text-shadow: 0 0 10px rgba(255,255,255,.35); }
.garden-copy > p { max-width: 390px; margin: 0; color: rgba(244,240,255,.72); font-size: 14px; line-height: 1.8; }
.garden-stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; max-width: 360px; margin-top: 18px; }
.garden-stats > div, .garden-level-panel { border: 1px solid rgba(255,255,255,.13); background: rgba(255,255,255,.075); box-shadow: inset 0 1px rgba(255,255,255,.07); backdrop-filter: blur(10px); }
.garden-stats > div { padding: 10px 13px; border-radius: 14px; }
.garden-stats span { display: block; color: rgba(244,240,255,.58); font-size: 10px; letter-spacing: .08em; }
.garden-stats strong { display: flex; align-items: baseline; margin-top: 3px; color: #fff; font-family: Georgia, serif; font-size: 24px; line-height: 1; }
.garden-stats strong > span { color: inherit; font: inherit; letter-spacing: 0; }
.garden-stats small { margin-left: 3px; color: rgba(244,240,255,.54); font: 600 11px ui-rounded, system-ui, sans-serif; }
.garden-level-panel { max-width: 360px; margin-top: 10px; padding: 11px 13px 12px; border-radius: 14px; }
.garden-level-panel > div:first-child { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.garden-level-panel span { color: rgba(244,240,255,.67); font-size: 11px; }
.garden-level-panel strong { color: #d8d1ff; font-size: 11px; white-space: nowrap; }
.garden-progress-track { height: 10px; margin-top: 9px; overflow: hidden; border-radius: 99px; background: rgba(0,0,0,.4); box-shadow: inset 0 2px 5px rgba(0,0,0,.5); }
.garden-progress-track > div { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #8bc34a, #00bcd4, #e040fb); box-shadow: 0 0 10px rgba(255,255,255,.5); transition: width .1s linear; }
.garden-action { margin-top: 19px; }
.garden-start-button { width: min(100%, 330px); min-height: 58px; padding: 11px 20px; border: 0; border-radius: 8px; color: #fff; background: #4da6ff; box-shadow: 0 4px 6px rgba(0,0,0,.3); cursor: pointer; transition: transform .2s, background .2s, opacity .2s; }
.garden-start-button span, .garden-start-button small { display: block; }
.garden-start-button span { font-size: 16px; font-weight: 900; }
.garden-start-button small { margin-top: 3px; color: rgba(255,255,255,.72); font-size: 10px; font-weight: 800; letter-spacing: .08em; }
.garden-start-button:hover:not(:disabled) { background: #2b8ee5; transform: translateY(-2px); }
.garden-start-button:active:not(:disabled) { transform: translateY(1px); }
.garden-start-button:focus-visible { outline: 3px solid rgba(255,255,255,.66); outline-offset: 4px; }
.garden-start-button:disabled { opacity: .55; cursor: wait; box-shadow: none; }
#homeStatus { min-height: 17px; margin: 9px 2px 0; color: rgba(244,240,255,.53); font-size: 11px; }
.garden-scene { --ground-h: 35; --ground-s: 25%; --ground-l: 55%; --sky-h: 200; --sky-s: 80%; --sky-l: 90%; position: relative; min-height: 474px; overflow: hidden; isolation: isolate; border-radius: 20px; background: linear-gradient(180deg, hsl(var(--sky-h), var(--sky-s), var(--sky-l)) 0%, hsl(var(--sky-h), var(--sky-s), calc(var(--sky-l) + 15%)) 100%); box-shadow: 0 10px 40px rgba(0,0,0,.6); transition: background .3s; }
.garden-stage-label { position: absolute; z-index: 20; left: 18px; top: 18px; max-width: min(330px, calc(100% - 36px)); padding: 10px 13px; border: 1px solid rgba(255,255,255,.24); border-radius: 13px; color: #f7f3ff; background: rgba(26,26,26,.34); box-shadow: 0 6px 16px rgba(1,3,20,.18); backdrop-filter: blur(10px); }
.garden-stage-label span, .garden-stage-label strong { display: block; }
.garden-stage-label span { color: rgba(241,235,255,.58); font-size: 9px; font-weight: 850; letter-spacing: .12em; }
.garden-stage-label strong { margin-top: 3px; font-size: 13px; font-weight: 800; line-height: 1.45; }
.garden-ground { position: absolute; bottom: 0; width: 100%; height: 55%; overflow: hidden; border-top-left-radius: 50% 8%; border-top-right-radius: 50% 8%; background: hsl(var(--ground-h), var(--ground-s), var(--ground-l)); box-shadow: inset 0 30px 60px rgba(0,0,0,.25); transition: background .3s; }
.garden-entities { position: absolute; inset: 0; pointer-events: none; }
.garden-entity { position: absolute; display: block; font-size: 2rem; line-height: 1; pointer-events: none; transform: scale(var(--entity-scale, 1)) rotate(var(--entity-tilt, 0deg)); transform-origin: bottom center; }
.garden-entity.new-growth { animation: entity-grow .5s cubic-bezier(.175,.885,.32,1.275) both; }
.garden-boost { position: absolute; z-index: 9999; right: 16px; bottom: 16px; padding: 9px 13px; border: 1px solid rgba(255,255,255,.52); border-radius: 8px; color: #222044; background: rgba(255,252,244,.94); box-shadow: 0 7px 18px rgba(0,0,0,.24); font-size: 12px; font-weight: 850; opacity: 0; transform: translateY(8px) scale(.92); pointer-events: none; }
.garden-boost.show { animation: vitality-pop .95s ease both; }
.magic-glow { box-shadow: 0 0 50px #e040fb, inset 0 0 50px #00bcd4 !important; }

.quiz-shell {
  position: relative;
  background: rgba(255, 253, 248, .72);
  border: 1px solid rgba(255,255,255,.8);
  box-shadow: var(--shadow);
  border-radius: 36px;
  padding: 30px 38px 34px;
  backdrop-filter: blur(16px);
}

.progress-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 11px; }
.progress-copy { display: flex; align-items: center; gap: 12px; color: var(--muted); font-size: 13px; }
.progress-copy strong { color: var(--ink); }
.eyebrow { color: var(--forest); font-size: 11px; font-weight: 850; letter-spacing: .18em; text-transform: uppercase; }
.score { display: flex; align-items: center; gap: 6px; color: #a56c03; }
.score svg { width: 18px; fill: var(--sun); stroke: #c98c1a; stroke-width: 1.2; }

.progress-track { width: 100%; height: 7px; overflow: hidden; border-radius: 99px; background: var(--paper-deep); }
.progress-fill { width: 12.5%; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--coral), #f4a555); transition: width .45s cubic-bezier(.2,.75,.25,1); }

.prompt-block { text-align: center; margin: 25px 0 25px; }
.prompt { margin: 0 0 5px; font-size: 14px; color: var(--muted); }
.word-line { display: flex; justify-content: center; align-items: center; gap: 10px; }
.word-line h1 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(43px, 5.5vw, 66px); font-weight: 500; line-height: 1.12; letter-spacing: -.035em; }
.speak-button { width: 38px; height: 38px; background: #e9f1e9; border-radius: 50%; }
.word-meta { margin-top: 5px; display: flex; justify-content: center; align-items: center; gap: 9px; color: var(--muted); font-family: Georgia, serif; font-size: 14px; }
.word-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: #a2a69f; }

.choice-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }

.choice-card {
  position: relative;
  overflow: hidden;
  border: 2px solid transparent;
  padding: 0;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  background: var(--white);
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(46, 43, 34, .08);
  transition: transform .2s, border-color .2s, box-shadow .2s, opacity .2s;
}

.choice-card:hover:not(:disabled) { transform: translateY(-5px); box-shadow: 0 13px 28px rgba(46,43,34,.14); }
.choice-card:focus-visible { outline: 3px solid rgba(34,96,80,.36); outline-offset: 3px; }
.choice-card img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .35s; }
.emoji-visual {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 35% 28%, rgba(255,255,255,.9), transparent 8rem),
    linear-gradient(135deg, #fffaf0, #e9f1e9);
  font-size: clamp(58px, 9vw, 108px);
  line-height: 1;
  transition: transform .35s;
}
.choice-card:hover:not(:disabled) img { transform: scale(1.025); }
.choice-card:hover:not(:disabled) .emoji-visual { transform: scale(1.045); }
.choice-number { position: absolute; left: 10px; top: 10px; width: 27px; height: 27px; border-radius: 9px; display: grid; place-items: center; color: var(--ink); background: rgba(255,253,248,.9); box-shadow: 0 2px 8px rgba(0,0,0,.08); font-size: 12px; font-weight: 800; }
.choice-state { position: absolute; inset: 9px 9px auto auto; width: 31px; height: 31px; border-radius: 50%; display: none; place-items: center; color: white; font-size: 18px; font-weight: 900; box-shadow: 0 3px 10px rgba(0,0,0,.16); }
.choice-credit { position: absolute; right: 8px; bottom: 8px; padding: 4px 7px; border-radius: 7px; background: rgba(20, 31, 27, .58); color: white; font-size: 9px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.choice-card.correct { border-color: var(--success); box-shadow: 0 0 0 4px rgba(35,133,94,.12); }
.choice-card.correct .choice-state { display: grid; background: var(--success); }
.choice-card.wrong { border-color: var(--error); box-shadow: 0 0 0 4px rgba(217,93,85,.11); }
.choice-card.wrong .choice-state { display: grid; background: var(--error); }
.choice-card.dimmed { opacity: .58; }
.choice-card:disabled { cursor: default; }
.choice-card.loading { background: linear-gradient(135deg, rgba(255,253,248,.96), rgba(238,230,214,.75)); box-shadow: inset 0 0 0 1px rgba(37,49,45,.08); }
.image-loader { position: absolute; inset: 0; overflow: hidden; }
.image-loader::after { content: ""; position: absolute; inset: 0; transform: translateX(-100%); background: linear-gradient(90deg, transparent, rgba(255,255,255,.68), transparent); animation: loading-sheen 1.35s infinite; }

.load-error {
  grid-column: 1 / -1;
  min-height: 230px;
  padding: 28px;
  border: 1px dashed rgba(34,96,80,.24);
  border-radius: var(--radius-md);
  background: rgba(255,253,248,.78);
  display: grid;
  place-items: center;
  text-align: center;
  gap: 18px;
}

.load-error p { max-width: 420px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }

.keyboard-hint { margin: 21px 0 0; text-align: center; color: #989b94; font-size: 11px; }
.keyboard-hint span { margin: 0 5px; }
kbd { border: 1px solid #d6d0c3; border-bottom-width: 2px; border-radius: 5px; padding: 1px 5px; background: #fffaf0; font-family: inherit; font-size: 10px; }

.feedback { position: fixed; z-index: 20; left: 0; right: 0; bottom: 0; border-top: 1px solid rgba(34,96,80,.14); background: rgba(249, 246, 237, .96); backdrop-filter: blur(18px); transform: translateY(105%); transition: transform .35s cubic-bezier(.2,.8,.2,1); }
.feedback.show { transform: translateY(0); }
.feedback[data-kind="correct"] { background: rgba(232, 246, 236, .97); }
.feedback[data-kind="wrong"] { background: rgba(253, 237, 233, .97); }
.feedback-inner { width: min(920px, calc(100% - 48px)); min-height: 116px; margin: 0 auto; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 18px; }
.feedback-icon { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 50%; color: white; font-size: 24px; font-weight: 900; }
[data-kind="correct"] .feedback-icon { background: var(--success); }
[data-kind="wrong"] .feedback-icon { background: var(--error); }
.feedback-copy strong { display: block; margin-bottom: 4px; font-size: 17px; }
[data-kind="correct"] .feedback-copy strong { color: var(--success); }
[data-kind="wrong"] .feedback-copy strong { color: var(--error); }
.feedback-copy p { margin: 0; font-size: 13px; color: var(--ink); }
.feedback-copy .example { margin-left: 12px; color: var(--muted); font-family: Georgia, serif; font-style: italic; }
.continue-button, .primary-button { border: 0; border-radius: 14px; background: var(--forest); color: white; font-weight: 800; cursor: pointer; box-shadow: 0 8px 16px rgba(34,96,80,.18); transition: transform .2s, background .2s; }
.continue-button { min-width: 122px; height: 48px; }
.continue-button:hover, .primary-button:hover { transform: translateY(-2px); background: var(--forest-dark); }
.continue-button span { margin-left: 5px; }

.result-card { max-width: 720px; margin: 30px auto 0; padding: 48px; text-align: center; border: 1px solid rgba(255,255,255,.82); border-radius: 36px; background: rgba(255,253,248,.78); box-shadow: var(--shadow); animation: screen-in .42s ease both; }
.result-art { position: relative; width: 130px; height: 105px; margin: 0 auto 18px; }
.result-cat { position: absolute; inset: 22px 0 0; font-size: 68px; filter: drop-shadow(0 8px 9px rgba(0,0,0,.1)); }
.ray { position: absolute; width: 7px; height: 22px; border-radius: 9px; background: var(--sun); }
.ray-one { top: 0; left: 61px; }
.ray-two { top: 17px; left: 18px; transform: rotate(-55deg); }
.ray-three { top: 17px; right: 18px; transform: rotate(55deg); }
.result-card h1 { margin: 9px 0 9px; font-family: Georgia, "Songti SC", serif; font-size: clamp(32px, 5vw, 45px); font-weight: 500; }
.result-lead { margin: 0; color: var(--muted); font-size: 15px; }
.result-reward { width: fit-content; margin: 22px auto 0; padding: 11px 17px; display: flex; align-items: center; gap: 10px; border: 1px solid rgba(35,133,94,.16); border-radius: 16px; background: var(--success-soft); text-align: left; }
.result-reward > span { font-size: 27px; }
.result-reward small, .result-reward strong { display: block; }
.result-reward small { color: var(--muted); font-size: 9px; letter-spacing: .1em; }
.result-reward strong { margin-top: 2px; color: var(--success); font-size: 14px; }
.result-stats { margin: 32px 0 27px; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
.result-stats div { padding: 19px 10px; }
.result-stats div + div { border-left: 1px solid var(--line); }
.result-stats strong, .result-stats span { display: block; }
.result-stats strong { color: var(--forest); font-family: Georgia, serif; font-size: 29px; }
.result-stats span { margin-top: 3px; color: var(--muted); font-size: 11px; }
.review-list { padding: 16px; border-radius: 16px; background: var(--error-soft); text-align: left; }
.review-list p { margin: 0 0 10px; font-size: 12px; color: var(--muted); }
.review-list #reviewWords { display: flex; flex-wrap: wrap; gap: 8px; }
.review-chip { padding: 6px 10px; border-radius: 8px; background: white; font-size: 12px; }
.review-chip strong { margin-right: 5px; }
.result-actions { margin-top: 29px; display: flex; flex-direction: column; align-items: center; gap: 17px; }
.primary-button { min-width: 180px; height: 52px; }
.secondary-button { min-width: 180px; height: 46px; border: 1px solid rgba(34,96,80,.22); border-radius: 14px; color: var(--forest); background: transparent; font-weight: 800; cursor: pointer; transition: transform .2s, background .2s; }
.secondary-button:hover { transform: translateY(-2px); background: #e9f1e9; }
.text-link { color: var(--muted); font-size: 13px; text-underline-offset: 4px; }
[hidden] { display: none !important; }
noscript { display: block; margin: 40px auto; text-align: center; color: var(--error); }

@media (max-width: 800px) {
  .garden-card { grid-template-columns: 1fr; }
  .garden-copy { display: block; }
  .garden-scene { min-height: 390px; }
  .choice-grid { grid-template-columns: repeat(2, 1fr); max-width: 580px; margin: 0 auto; }
  .quiz-shell { padding-left: 28px; padding-right: 28px; }
  .word-line h1 { font-size: 49px; }
}

@media (max-width: 560px) {
  .topbar { width: calc(100% - 32px); height: 76px; }
  .brand-mark { width: 42px; height: 42px; border-radius: 13px; }
  .brand-mark svg { width: 30px; }
  .brand-copy strong { font-size: 16px; }
  .brand-copy small { font-size: 8px; }
  .streak-pill { height: 38px; padding: 0 12px; }
  .icon-button { width: 38px; height: 38px; }
  main { width: calc(100% - 24px); padding-top: 8px; padding-bottom: 170px; }
  .garden-card { gap: 20px; min-height: 0; padding: 20px; border-radius: 25px; }
  .garden-title { margin-top: 7px; font-size: 34px; }
  .garden-copy > p { font-size: 12px; }
  .garden-stats { margin-top: 14px; }
  .garden-start-button { width: 100%; }
  .garden-scene { min-height: 310px; border-radius: 18px; }
  .garden-stage-label { left: 13px; top: 13px; }
  .garden-entity { font-size: 1.7rem; }
  .quiz-shell { border-radius: 25px; padding: 22px 14px 25px; }
  .prompt-block { margin: 23px 0 20px; }
  .word-line h1 { font-size: 44px; }
  .choice-grid { gap: 10px; }
  .choice-card { border-radius: 15px; }
  .choice-number { left: 7px; top: 7px; width: 24px; height: 24px; }
  .keyboard-hint { display: none; }
  .feedback-inner { width: calc(100% - 28px); min-height: 142px; grid-template-columns: auto 1fr; gap: 12px; padding: 13px 0 14px; }
  .feedback-icon { width: 40px; height: 40px; font-size: 20px; }
  .feedback-copy .example { display: block; margin: 3px 0 0; }
  .continue-button { grid-column: 1 / -1; width: 100%; height: 44px; }
  .result-card { margin-top: 12px; padding: 35px 19px; border-radius: 27px; }
  .result-stats strong { font-size: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

@keyframes loading-sheen {
  to { transform: translateX(100%); }
}

@keyframes screen-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes entity-grow {
  0% { opacity: 0; transform: scale(0) rotate(-15deg) translateY(18px); }
  100% { opacity: 1; transform: scale(var(--entity-scale)) rotate(var(--entity-tilt)) translateY(0); }
}

@keyframes vitality-pop {
  0% { opacity: 0; transform: translateY(8px) scale(.92); }
  22%, 68% { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-9px) scale(.98); }
}

@keyframes butterfly-float {
  from { transform: translate3d(-2px, 4px, 0) rotate(-14deg); }
  to { transform: translate3d(8px, -6px, 0) rotate(10deg); }
}

@keyframes cloud-drift {
  from { transform: translateX(-4px); }
  to { transform: translateX(12px); }
}

@keyframes cloud-drift-small {
  from { transform: translateX(6px) scale(.7); }
  to { transform: translateX(-9px) scale(.7); }
}