/* Trumpet Rally Quiz
   Layout: one game stage, one screen at a time. Chunky colored answer tiles on a cream question card over a deep violet field.
   Language: every text is an <span class="en"> and <span class="zh"> pair. The data-lang attribute on <html> picks en, zh or both. */
:root {
  --bg: #1b1146;
  --bg-glow-a: #3a1d93;
  --bg-glow-b: #0f2a6b;
  --card: #fff9ec;
  --ink: #241a52;
  --ink-soft: #55487f;
  --cream: #fff3d6;
  --pink: #e63950;
  --pink-d: #9c1c30;
  --amber: #ffb703;
  --amber-d: #b87d00;
  --teal: #12b5a6;
  --teal-d: #0a6f65;
  --blue: #4361ee;
  --blue-d: #26379f;
  --green: #14a85b;
  --green-d: #0b6b39;
  --boom: #ff3b30;
  --on-dark: #ffffff;
  --on-amber: #2b1a00;
  --on-teal: #04302b;
  --display: 'Lilita One', 'Arial Rounded MT Bold', 'Trebuchet MS', system-ui, sans-serif;
  --body: 'Nunito', 'Segoe UI', system-ui, sans-serif;
  --display-zh: 'ZCOOL KuaiLe', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --body-zh: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-zh: var(--body-zh);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { font-size: 112.5%; }

body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    radial-gradient(60rem 40rem at 10% -10%, var(--bg-glow-a), transparent 60%),
    radial-gradient(50rem 36rem at 100% 100%, var(--bg-glow-b), transparent 60%);
  background-attachment: fixed;
  color: var(--on-dark);
  font-family: var(--body);
  font-weight: 800;
  font-size: 1.2rem;
  line-height: 1.45;
  padding-inline: 16px;
  padding-block: 18px 40px;
  min-height: 100vh;
}

[hidden] { display: none !important; }

.stage { max-width: 980px; margin-inline: auto; }
.stage.shake { animation: shake .55s cubic-bezier(.36, .07, .19, .97) both; }

/* ---------- Language switch ---------- */
.zh { font-family: var(--font-zh); }
html[data-lang="en"] .zh { display: none; }
html[data-lang="zh"] .en { display: none; }
html[data-lang="both"] .zh { margin-left: .4em; }

/* Containers marked .stack show the English line above the Chinese line when both are on. */
html[data-lang="both"] .stack > .en,
html[data-lang="both"] .stack > .zh { display: block; margin-left: 0; }
html[data-lang="both"] .stack > .zh { font-size: .84em; margin-top: .15em; opacity: .93; }

/* Display-face containers use the playful Chinese display face. */
h1, h2, h3, .big, .brand, .rn, .rt, .badge, .rpill, .score-big, .word, .seg, .ans::after { --font-zh: var(--display-zh); }
h1 .zh, h2 .zh, h3 .zh, .big .zh, .brand .zh, .rn .zh, .rt .zh, .rpill .zh, .word .zh, .ans::after { font-weight: 400; }

.lang { display: inline-flex; background: rgba(255, 255, 255, .14); border-radius: 999px; padding: 4px; gap: 2px; }
.seg {
  font: inherit; font-family: var(--display); font-size: 1.05rem; letter-spacing: .02em; font-weight: 400;
  color: var(--on-dark); background: transparent; border: 0; border-radius: 999px; padding: 6px 14px; cursor: pointer;
}
.seg:hover { background: rgba(255, 255, 255, .16); }
.seg[aria-pressed="true"] { background: var(--amber); color: var(--on-amber); }

/* ---------- Header ---------- */
.bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 22px; }
.brand { display: flex; align-items: center; gap: 12px; font-family: var(--display); font-size: 1.9rem; line-height: 1.1; letter-spacing: .02em; color: var(--cream); }
.brand svg { width: 3rem; height: 3rem; flex: none; }
.chips { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.chip {
  font: inherit; font-size: 1.05rem; font-weight: 900; color: var(--on-dark);
  background: rgba(255, 255, 255, .14); border: 0; border-radius: 999px; padding: 8px 18px;
}
.chip b { font-family: var(--display); font-weight: 400; font-size: 1.35rem; margin-left: 4px; color: var(--amber); }
.chip.hot { background: var(--pink); }
.chip.hot b { color: var(--on-dark); }
button.chip { cursor: pointer; }
button.chip:hover { background: rgba(255, 255, 255, .24); }

/* ---------- Shared buttons ---------- */
.big {
  font-family: var(--display); font-weight: 400; font-size: 1.7rem; letter-spacing: .02em;
  color: var(--on-amber); background: var(--amber); border: 0; border-radius: 999px;
  padding: 16px 40px; cursor: pointer; box-shadow: 0 8px 0 var(--amber-d), 0 16px 26px rgba(0, 0, 0, .35);
  transition: transform .12s, box-shadow .12s;
}
.big:hover { transform: translateY(-3px); }
.big:active { transform: translateY(6px); box-shadow: 0 2px 0 var(--amber-d), 0 6px 12px rgba(0, 0, 0, .3); }
:focus-visible { outline: 5px solid #fff; outline-offset: 4px; }

h1, h2, h3 { font-family: var(--display); font-weight: 400; margin: 0; text-wrap: balance; }

/* ---------- Start screen ---------- */
.hero { display: grid; gap: 22px; padding-block: 8px 4px; }
.hero h1 { font-size: clamp(2.6rem, 8vw, 5rem); line-height: 1.02; color: var(--cream); text-shadow: 0 5px 0 var(--pink-d), 0 10px 0 rgba(0, 0, 0, .25); }
.hero p { margin: 0; max-width: 36rem; font-size: 1.4rem; color: #e6defc; }
.rounds { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
@media (max-width: 760px) { .rounds { grid-template-columns: 1fr; } }
.rcard { border-radius: 22px; padding: 18px 20px; display: grid; gap: 4px; min-width: 0; }
.rcard .rn { font-family: var(--display); font-size: 1.1rem; letter-spacing: .08em; text-transform: uppercase; opacity: .85; }
.rcard .rt { font-family: var(--display); font-size: 1.55rem; line-height: 1.15; }
.rcard .rv { font-size: 1.05rem; opacity: .95; }
.rc1 { background: var(--pink); color: var(--on-dark); box-shadow: 0 8px 0 var(--pink-d); }
.rc2 { background: var(--amber); color: var(--on-amber); box-shadow: 0 8px 0 var(--amber-d); }
.rc3 { background: var(--blue); color: var(--on-dark); box-shadow: 0 8px 0 var(--blue-d); }
.startrow { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; margin-top: 8px; }
.best { font-size: 1.15rem; color: #cfc4f5; }

/* ---------- Round screen ---------- */
.roundscreen { display: grid; gap: 22px; justify-items: start; padding-block: 24px; }
.rnum {
  width: 8.5rem; height: 8.5rem; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--display); font-size: 5rem; line-height: 1;
}
.roundscreen h2 { font-size: clamp(2rem, 6vw, 3.6rem); line-height: 1.08; color: var(--cream); }
.roundscreen p { margin: 0; max-width: 38rem; font-size: 1.4rem; color: #e6defc; }
.roundscreen .rv { font-size: 1.2rem; color: var(--amber); }

/* ---------- Quiz screen ---------- */
.pips { display: flex; gap: 6px; margin-bottom: 18px; }
.pip { flex: 1; min-width: 0; height: 14px; border-radius: 7px; background: rgba(255, 255, 255, .2); transition: background .2s; }
.pip.now { background: #fff; }
.pip.ok { background: var(--green); }
.pip.no { background: var(--boom); }

.qcard {
  background: var(--card); color: var(--ink); border-radius: 30px;
  padding: clamp(20px, 4vw, 38px); box-shadow: 0 10px 0 rgba(0, 0, 0, .28), 0 24px 40px rgba(0, 0, 0, .35);
}
.qmeta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-bottom: 14px; font-size: 1.05rem; color: var(--ink-soft); }
.rpill { font-family: var(--display); font-size: 1.1rem; letter-spacing: .04em; border-radius: 999px; padding: 4px 16px; color: var(--on-dark); }
.rpill.r1 { background: var(--pink); }
.rpill.r2 { background: var(--amber); color: var(--on-amber); }
.rpill.r3 { background: var(--blue); }
.qtext { font-size: clamp(1.75rem, 4.8vw, 2.7rem); line-height: 1.15; margin-bottom: 26px; color: var(--ink); }
html[data-lang="zh"] .qtext, html[data-lang="both"] .qtext .zh { line-height: 1.25; }

.answers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
@media (max-width: 720px) { .answers { grid-template-columns: 1fr; } }

.ans {
  --c: var(--pink); --cd: var(--pink-d); --on: var(--on-dark);
  font: inherit; font-weight: 900; font-size: clamp(1.25rem, 3.3vw, 1.7rem); line-height: 1.2;
  text-align: left; color: var(--on); background: var(--c); border: 0; border-radius: 22px;
  padding: 18px 20px; min-height: 6.2rem; min-width: 0; overflow-wrap: break-word;
  display: flex; align-items: center; gap: 14px; cursor: pointer;
  box-shadow: 0 8px 0 var(--cd), 0 14px 22px rgba(0, 0, 0, .25);
  transition: transform .12s, box-shadow .12s, opacity .2s, filter .2s;
}
.ans .badge {
  flex: none; width: 2.7rem; height: 2.7rem; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--display); font-weight: 400; font-size: 1.5rem; background: var(--on); color: var(--c);
}
.ans .txt { flex: 1; min-width: 0; }
.a0 { --c: var(--pink); --cd: var(--pink-d); --on: var(--on-dark); }
.a1 { --c: var(--amber); --cd: var(--amber-d); --on: var(--on-amber); }
.a2 { --c: var(--teal); --cd: var(--teal-d); --on: var(--on-teal); }
.a3 { --c: var(--blue); --cd: var(--blue-d); --on: var(--on-dark); }
.ans:hover:not(.locked) { transform: translateY(-3px); }
.ans:active:not(.locked) { transform: translateY(6px); box-shadow: 0 2px 0 var(--cd), 0 4px 10px rgba(0, 0, 0, .25); }
.ans.locked { cursor: default; }
.ans.dim { opacity: .4; box-shadow: 0 3px 0 var(--cd); transform: translateY(4px); }
.ans.right { outline: 6px solid var(--green); outline-offset: 3px; animation: hop .6s ease-out; }
.ans.right::after, .ans.wrong::after {
  flex: none; font-family: var(--display); font-weight: 400; font-size: 1.05rem; letter-spacing: .04em;
  border-radius: 999px; padding: 4px 14px; background: #fff;
}
.ans.right::after { color: var(--green-d); }
.ans.wrong { outline: 6px solid var(--boom); outline-offset: 3px; animation: wobble .55s ease-out; }
.ans.wrong::after { color: #a3150d; }
html[data-lang="en"] .ans.right::after { content: "Correct!"; }
html[data-lang="en"] .ans.wrong::after { content: "Boom!"; }
html[data-lang="zh"] .ans.right::after { content: "答对了!"; font-family: var(--display-zh); }
html[data-lang="zh"] .ans.wrong::after { content: "轰隆!"; font-family: var(--display-zh); }
html[data-lang="both"] .ans.right::after { content: "Correct! 答对了!"; }
html[data-lang="both"] .ans.wrong::after { content: "Boom! 轰隆!"; }

.fb { margin-top: 26px; padding-top: 22px; border-top: 4px dashed rgba(36, 26, 82, .2); display: grid; gap: 12px; justify-items: start; }
.fb h3 { font-size: clamp(1.9rem, 5vw, 2.8rem); line-height: 1.05; }
.fb h3.good { color: var(--green); }
.fb h3.bad { color: #d8261b; }
.fb p { margin: 0; font-size: 1.3rem; font-weight: 700; color: var(--ink); max-width: 44rem; }
.fb .ref { font-size: 1.05rem; font-weight: 900; color: var(--ink-soft); }
.fb .big { margin-top: 6px; }

/* ---------- End screen ---------- */
.endscreen { display: grid; gap: 20px; justify-items: start; padding-block: 12px; }
.endscreen .label { font-size: 1.3rem; color: #cfc4f5; }
.score-big { font-family: var(--display); font-size: clamp(4.5rem, 20vw, 9rem); line-height: .95; color: var(--amber); text-shadow: 0 6px 0 var(--amber-d), 0 12px 0 rgba(0, 0, 0, .25); }
.endscreen h2 { font-size: clamp(2rem, 6vw, 3.4rem); line-height: 1.08; color: var(--cream); }
.endscreen .meta { font-size: 1.25rem; color: #e6defc; }
.verse { background: var(--card); color: var(--ink); border-radius: 24px; padding: 20px 24px; max-width: 40rem; box-shadow: 0 8px 0 rgba(0, 0, 0, .28); }
.verse q { quotes: none; display: block; font-size: 1.5rem; line-height: 1.3; font-weight: 800; }
.verse q .zh { margin-top: .3em; }
.verse cite { display: block; margin-top: 8px; font-style: normal; font-size: 1.05rem; color: var(--ink-soft); }

/* ---------- Effects ---------- */
#fx { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 50; }
#flash {
  position: fixed; inset: 0; pointer-events: none; z-index: 40; opacity: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 220, 90, .95), rgba(255, 59, 48, .75) 55%, rgba(255, 59, 48, 0) 80%);
}
#flash.go { animation: flash .6s ease-out; }
#kaboom { position: fixed; inset: 0; display: grid; place-items: center; pointer-events: none; z-index: 60; opacity: 0; }
#kaboom .burst { position: relative; width: min(88vw, 540px); aspect-ratio: 1; display: grid; place-items: center; }
#kaboom svg { position: absolute; inset: 0; width: 100%; height: 100%; max-width: 100%; filter: drop-shadow(0 12px 0 rgba(0, 0, 0, .3)); }
#kaboom .word {
  position: relative; text-align: center; font-family: var(--display); font-size: clamp(2.8rem, 12.5vw, 5.6rem); line-height: 1.05; letter-spacing: .02em;
  color: #fff; -webkit-text-stroke: 5px #8a1020; paint-order: stroke fill; text-shadow: 0 6px 0 #8a1020;
  transform: rotate(-6deg);
}
#kaboom .word .zh { -webkit-text-stroke: 4px #8a1020; }
#kaboom.pop { animation: pop 1.15s ease-out forwards; }

@keyframes pop {
  0% { opacity: 0; transform: scale(.2) rotate(-14deg); }
  14% { opacity: 1; transform: scale(1.25) rotate(4deg); }
  28% { transform: scale(.95) rotate(-2deg); }
  75% { opacity: 1; transform: scale(1.05) rotate(1deg); }
  100% { opacity: 0; transform: scale(1.25) rotate(0); }
}
@keyframes flash { 0% { opacity: 1; } 100% { opacity: 0; } }
@keyframes shake {
  10%, 90% { transform: translate3d(-3px, 1px, 0); }
  20%, 80% { transform: translate3d(7px, -2px, 0); }
  30%, 50%, 70% { transform: translate3d(-12px, 3px, 0); }
  40%, 60% { transform: translate3d(12px, -3px, 0); }
}
@keyframes wobble {
  0% { transform: translateY(4px) rotate(0); }
  20% { transform: translateY(4px) rotate(-3deg); }
  40% { transform: translateY(4px) rotate(3deg); }
  60% { transform: translateY(4px) rotate(-2deg); }
  80% { transform: translateY(4px) rotate(1deg); }
  100% { transform: translateY(4px) rotate(0); }
}
@keyframes hop {
  0% { transform: translateY(0) scale(1); }
  35% { transform: translateY(-10px) scale(1.04); }
  100% { transform: translateY(0) scale(1); }
}
@keyframes fadeOnly { 0% { opacity: 0; } 15% { opacity: 1; } 80% { opacity: 1; } 100% { opacity: 0; } }

@media (prefers-reduced-motion: reduce) {
  .stage.shake { animation: none; }
  .ans.right, .ans.wrong { animation: none; }
  #kaboom.pop { animation: fadeOnly 1.1s ease-out forwards; }
  #flash.go { animation: none; }
  .big, .ans { transition: none; }
}