:root {
  color-scheme: light;
  font-family: "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  background: #edf5f4;
  color: #142b35;
}
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: radial-gradient(circle at 14% 4%, var(--game-accent-soft, #d9f5ee), transparent 34%), #edf5f4; }
button, select, textarea { font: inherit; }
a { color: inherit; }
.reasoning-topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px clamp(16px, 4vw, 54px); background: #071923; color: #fff; }
.reasoning-topbar > a { font-weight: 900; text-decoration: none; }
.reasoning-topbar nav { display: flex; align-items: center; gap: 14px; }
.reasoning-topbar nav a { color: #d8eef2; }
main { width: min(1240px, calc(100% - 32px)); margin: 0 auto; padding: 26px 0 48px; }
.reasoning-hero { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 28px; align-items: center; overflow: hidden; padding: clamp(26px, 5vw, 58px); border-radius: 30px; background: linear-gradient(135deg, var(--game-deep, #0b3340), #102b38 68%, #151d29); color: #f8ffff; box-shadow: 0 24px 58px rgba(10, 36, 48, .2); }
.reasoning-hero::after { content: ""; position: absolute; inset: auto -80px -130px auto; width: 330px; height: 330px; border: 1px solid color-mix(in srgb, var(--game-accent, #ffd46a) 48%, transparent); border-radius: 50%; }
.reasoning-kicker { margin: 0 0 8px; color: var(--game-accent, #ffd46a); font-size: .78rem; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.reasoning-hero h1 { max-width: 760px; margin: 0; font-family: "Noto Serif TC", serif; font-size: clamp(2rem, 5vw, 4.6rem); line-height: 1.08; }
.reasoning-hero p:not(.reasoning-kicker) { max-width: 760px; color: #d7e9ec; font-size: 1.02rem; line-height: 1.8; }
.reasoning-hero__actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 22px; }
.reasoning-hero__actions label { display: flex; gap: 8px; align-items: center; color: #d7e9ec; font-size: .88rem; }
.reasoning-hero__actions select { min-height: 44px; padding: 0 34px 0 12px; border: 1px solid #75919a; border-radius: 12px; background: #f9ffff; color: #15303a; }
.reasoning-hero__sigil { position: relative; z-index: 1; display: grid; place-items: center; aspect-ratio: 1; border: 1px solid color-mix(in srgb, var(--game-accent, #ffd46a) 72%, white); border-radius: 50%; background: radial-gradient(circle, color-mix(in srgb, var(--game-accent, #ffd46a) 32%, transparent), transparent 62%); color: var(--game-accent, #ffd46a); font-size: 5.5rem; box-shadow: inset 0 0 45px color-mix(in srgb, var(--game-accent, #ffd46a) 22%, transparent); }
.reasoning-button { min-height: 44px; padding: 10px 16px; border: 1px solid #a9c1c5; border-radius: 12px; background: #fff; color: #17323d; font-weight: 800; cursor: pointer; }
.reasoning-button:hover, .reasoning-button:focus-visible { border-color: var(--game-accent, #d79a12); outline: 3px solid color-mix(in srgb, var(--game-accent, #d79a12) 24%, transparent); outline-offset: 2px; }
.reasoning-button:disabled { opacity: .45; cursor: not-allowed; }
.reasoning-button--primary { border-color: var(--game-accent, #ffd46a); background: var(--game-accent, #ffd46a); color: #102731; }
.reasoning-metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 18px 0; }
.reasoning-metrics article { padding: 17px; border: 1px solid #c9dddd; border-radius: 17px; background: rgba(255,255,255,.86); }
.reasoning-metrics strong, .reasoning-metrics span { display: block; }
.reasoning-metrics strong { color: var(--game-deep, #123c46); font-size: 1.65rem; }
.reasoning-metrics span { margin-top: 3px; color: #5d7378; font-size: .82rem; }
.reasoning-layout { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(300px, .85fr); gap: 18px; align-items: start; }
.reasoning-mission, .reasoning-museum { padding: clamp(20px, 3vw, 30px); border: 1px solid #c4d8d8; border-radius: 24px; background: rgba(255,255,255,.94); box-shadow: 0 14px 36px rgba(25, 64, 70, .08); }
.reasoning-mission--empty { min-height: 350px; display: grid; align-content: center; text-align: center; }
.reasoning-mission--complete { border-color: var(--game-accent, #efb62e); background: linear-gradient(145deg, #fff, color-mix(in srgb, var(--game-accent-soft, #e8f7e9) 68%, white)); }
.reasoning-mission__head, .reasoning-section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.reasoning-mission h2, .reasoning-museum h2, .reasoning-stage h3, .reasoning-trace h3 { margin: 0; color: #102f39; }
.reasoning-difficulty, .reasoning-section-head span { padding: 5px 9px; border-radius: 999px; background: #e8f1f0; color: #4b686d; font-size: .75rem; font-weight: 800; }
.reasoning-stage-rail { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 22px 0; padding: 0; list-style: none; }
.reasoning-stage-rail li { display: flex; align-items: center; gap: 7px; padding: 9px; border-radius: 12px; background: #eef3f2; color: #789095; font-size: .8rem; font-weight: 800; }
.reasoning-stage-rail li span { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; background: #d9e5e4; }
.reasoning-stage-rail li.is-active { background: color-mix(in srgb, var(--game-accent-soft, #dff4ef) 72%, white); color: #153a43; }
.reasoning-stage-rail li.is-done { background: #daf1e4; color: #245b43; }
.reasoning-prompt { padding: 17px; border-left: 4px solid var(--game-accent, #efb62e); background: #f7faf9; font-size: 1.08rem; font-weight: 800; line-height: 1.75; }
.reasoning-stage { margin-top: 18px; padding: 20px; border: 1px solid #d2e0df; border-radius: 18px; background: #fbfdfc; }
.reasoning-stage > p:not(.reasoning-kicker) { color: #536d72; line-height: 1.65; }
.reasoning-choices { display: grid; gap: 10px; margin: 16px 0; }
.reasoning-choice { display: grid; grid-template-columns: 24px 32px minmax(0, 1fr); gap: 9px; align-items: center; padding: 13px; border: 1px solid #cadbd9; border-radius: 13px; background: #fff; cursor: pointer; }
.reasoning-choice:has(input:checked) { border-color: var(--game-accent, #efb62e); background: color-mix(in srgb, var(--game-accent-soft, #e7f7f2) 62%, white); box-shadow: 0 0 0 3px color-mix(in srgb, var(--game-accent, #efb62e) 18%, transparent); }
.reasoning-choice__letter { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px; background: #edf2f1; font-weight: 900; }
.reasoning-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.reasoning-mode-control { font-weight: 800; }
.reasoning-direct-note { margin: 18px 0; padding: 12px 14px; border-radius: 13px; background: #e7f3f1; color: #254d55; line-height: 1.6; }
.reasoning-help-label { align-self: center; color: #526e73; font-size: .86rem; font-weight: 800; }
.reasoning-selected-hints { display: grid; gap: 8px; margin: 14px 0 0; padding: 13px 13px 13px 34px; border-left: 4px solid #4d7d8b; border-radius: 12px; background: #e9f2f4; color: #294e58; line-height: 1.6; }
.reasoning-feedback { padding: 12px 14px; border-radius: 12px; font-weight: 800; line-height: 1.55; }
.reasoning-feedback.is-ok { background: #ddf4e7; color: #175c3e; }
.reasoning-feedback.is-retry { background: #fff1dc; color: #7a4b05; }
.reasoning-trace { margin-top: 22px; }
.reasoning-trace ol, .reasoning-replay-trace { display: grid; gap: 9px; padding: 0; list-style: none; }
.reasoning-trace__item { display: grid; grid-template-columns: 28px 1fr; gap: 9px; padding: 11px; border-radius: 12px; background: #f2f6f5; }
.reasoning-trace__item > span { font-size: 1.1rem; font-weight: 900; }
.reasoning-trace__item strong, .reasoning-trace__item small { display: block; }
.reasoning-trace__item small { margin-top: 4px; color: #5d7478; line-height: 1.45; }
.reasoning-trace__item.is-correct > span { color: #1f7b53; }
.reasoning-trace__item.is-retry > span { color: #b26c0a; }
.reasoning-museum { position: sticky; top: 16px; }
.reasoning-museum > p, .reasoning-privacy p { color: #5c7479; line-height: 1.6; }
.reasoning-artifacts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 9px; margin: 14px 0 24px; }
.reasoning-artifact { min-height: 118px; padding: 12px; border: 1px solid #d4e0df; border-radius: 15px; background: #f8faf9; }
.reasoning-artifact span, .reasoning-artifact strong, .reasoning-artifact small { display: block; }
.reasoning-artifact span { font-size: 1.55rem; }
.reasoning-artifact strong { margin-top: 7px; }
.reasoning-artifact small { margin-top: 4px; color: #6b7f82; }
.reasoning-artifact.is-open { border-color: color-mix(in srgb, var(--game-accent, #efb62e) 58%, #d4e0df); background: color-mix(in srgb, var(--game-accent-soft, #e7f7f2) 54%, white); }
.reasoning-artifact.is-locked { opacity: .66; }
.reasoning-case-list { display: grid; gap: 8px; max-height: 330px; overflow: auto; }
.reasoning-case-link { display: flex; justify-content: space-between; gap: 10px; padding: 11px; border: 1px solid #d0dfdd; border-radius: 11px; background: #fff; color: #173640; text-align: left; cursor: pointer; }
.reasoning-case-link span { color: #708588; font-size: .76rem; }
.reasoning-privacy { margin-top: 18px; padding: 13px; border-radius: 13px; background: #edf5f4; }
.reasoning-empty { color: #789094; line-height: 1.6; }
.reasoning-solution { margin: 18px 0; padding: 16px; border-radius: 14px; background: #eef6f4; line-height: 1.7; }
#learningEnergyStation { margin-top: 18px; }
.reasoning-reset { margin-top: 34px; padding-top: 18px; border-top: 1px solid #bfd1d0; text-align: center; }
.reasoning-dialog { width: min(760px, calc(100% - 24px)); max-height: 88vh; padding: 26px; border: 0; border-radius: 22px; box-shadow: 0 30px 90px rgba(0,0,0,.28); }
.reasoning-dialog::backdrop { background: rgba(4, 20, 27, .72); }
.reasoning-dialog__close { float: right; width: 40px; height: 40px; border: 0; border-radius: 50%; background: #eaf0ef; font-size: 1.4rem; cursor: pointer; }
.reasoning-dialog form { display: grid; gap: 12px; margin-top: 16px; }
.reasoning-dialog label { display: grid; gap: 6px; font-weight: 800; }
.reasoning-dialog select, .reasoning-dialog textarea { width: 100%; padding: 10px; border: 1px solid #b9cecc; border-radius: 10px; background: #fff; }
.reasoning-dialog textarea { min-height: 100px; resize: vertical; }
.reasoning-comments { display: grid; gap: 8px; }
.reasoning-comments article { padding: 10px; border-radius: 11px; background: #f2f6f5; }
.reasoning-comments p { margin: 4px 0 0; }
@media (max-width: 860px) {
  .reasoning-hero { grid-template-columns: 1fr; }
  .reasoning-hero__sigil { width: 150px; }
  .reasoning-layout { grid-template-columns: 1fr; }
  .reasoning-museum { position: static; }
}
@media (max-width: 620px) {
  main { width: min(100% - 20px, 1240px); padding-top: 12px; }
  .reasoning-topbar { padding: 12px; }
  .reasoning-hero { padding: 22px 18px; border-radius: 20px; }
  .reasoning-metrics { grid-template-columns: repeat(2, 1fr); }
  .reasoning-stage-rail { grid-template-columns: 1fr; }
  .reasoning-artifacts { grid-template-columns: 1fr 1fr; }
  .reasoning-mission, .reasoning-museum { padding: 17px; border-radius: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}