:root {
  --challenge-navy: #081d27; --challenge-deep: #06141b;
  --challenge-blue: #4eb8ff; --challenge-cyan: #79e5e0;
  --challenge-yellow: #ffe060; --challenge-red: #ff8995; --challenge-green: #75e4b5;
  --challenge-text: #f2f8f8; --challenge-muted: #aec4cd;
  --challenge-border: #ffffff24; --challenge-panel: #0e2935;
  color-scheme: dark; font-synthesis: none;
}
* { box-sizing: border-box; letter-spacing: 0; }
html { min-width: 320px; scroll-behavior: smooth; scroll-padding-top: 24px; }
body.challenge-page { margin: 0; min-height: 100vh; color: var(--challenge-text); background: var(--challenge-deep); font: 600 16px/1.55 "Nunito Sans", "Segoe UI", sans-serif; }
button, input, a { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; color: inherit; }
button:disabled { cursor: default; }
a { color: inherit; text-underline-offset: 4px; }
button, input, a { touch-action: manipulation; }
button:focus-visible, a:focus-visible, input:focus-visible { outline: 3px solid var(--challenge-yellow); outline-offset: 4px; }
[hidden] { display: none !important; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.15; font-weight: 900; }
h2 { font-size: 32px; }
img { display: block; max-width: 100%; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 100; padding: 10px 16px; color: #071c22; background: #fff; transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.challenge-header { position: relative; z-index: 5; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; width: min(1280px, calc(100% - 64px)); min-height: 84px; margin: auto; border-bottom: 1px solid var(--challenge-border); }
.challenge-logo, .challenge-player-brand { width: 82px; height: 54px; display: block; }
.challenge-logo img, .challenge-player-brand img { width: 100%; height: 100%; object-fit: contain; }
.challenge-header__title { display: grid; text-align: center; }
.challenge-header__title span, .challenge-kicker, .challenge-preview__label, .challenge-offer__eyebrow { font-size: 11px; font-weight: 900; text-transform: uppercase; color: var(--challenge-cyan); }
.challenge-header__title strong { font-size: 15px; }
.challenge-header__actions { display: flex; align-items: center; gap: 18px; justify-content: flex-end; }
.challenge-header__back { font-size: 13px; color: var(--challenge-muted); text-decoration: none; }
.icon-button { display: inline-grid; place-items: center; width: 42px; height: 42px; flex: 0 0 42px; padding: 0; border: 1px solid var(--challenge-border); border-radius: 50%; background: #102c38; color: var(--challenge-text); font-size: 20px; line-height: 1; transition: background .15s; }
.icon-button:hover { background: #1f4654; }
.challenge-primary, .challenge-secondary { display: inline-flex; justify-content: center; align-items: center; gap: 18px; min-height: 50px; padding: 13px 22px; border-radius: 8px; border: 1px solid transparent; font-size: 15px; font-weight: 900; text-decoration: none; transition: background .16s, box-shadow .16s; }
.challenge-primary { background: var(--challenge-yellow); color: #092129; box-shadow: 0 3px 0 #a48628; }
.challenge-primary:hover:not(:disabled) { background: #ffe98c; box-shadow: 0 3px 0 #a48628, 0 0 24px #ffe06026; }
.challenge-primary span { font-size: 22px; line-height: 1; }
.challenge-secondary { background: #14313c; border-color: #ffffff36; color: var(--challenge-text); }
.challenge-secondary:hover { background: #234550; }
.challenge-primary:disabled, .is-disabled { opacity: .5; box-shadow: none; pointer-events: none; }
.challenge-text-button { border: 0; background: none; color: var(--challenge-cyan); font-size: 13px; padding: 10px 0; text-decoration: underline; text-underline-offset: 4px; }
.challenge-dashboard { position: relative; }
.challenge-dashboard__intro { position: relative; isolation: isolate; max-width: none; min-height: 560px; padding: 54px max(32px, calc((100% - 1176px)/2)) 42px; text-align: left; background: url("assets/challenge/4k/d1-jupiter.jpg") center right / cover no-repeat; }
.challenge-dashboard__intro::before { position: absolute; inset: 0; z-index: -1; content: ""; background: linear-gradient(90deg, #06141bf5 0%, #06141bd9 35%, #06141b30 75%), linear-gradient(0deg, #06141b, transparent 35%); }
.challenge-dashboard__intro .challenge-kicker { display: inline-block; margin-bottom: 20px; color: var(--challenge-yellow); }
.challenge-dashboard__intro h1 { font-size: 60px; max-width: 700px; }
.challenge-dashboard__intro h1 span { color: var(--challenge-cyan); }
.challenge-dashboard__intro > p { max-width: 540px; font-size: 18px; margin: 22px 0; color: #d1e2e8; }
.challenge-value-row { display: flex; flex-wrap: wrap; gap: 32px; margin: 24px 0; }
.challenge-value-row > span { display: grid; gap: 3px; font-size: 12px; color: var(--challenge-muted); }
.challenge-value-row strong { font-size: 22px; color: #fff; line-height: 1.2; font-weight: 900; }
.challenge-dashboard__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.challenge-explore-link { display: inline-flex; align-items: center; gap: 12px; margin-top: 22px; color: var(--challenge-muted); font-size: 13px; text-decoration: none; }
.challenge-preview { max-width: 1176px; margin: 0 auto; display: flex; align-items: center; gap: 28px; padding: 16px 0 26px; border-bottom: 1px solid var(--challenge-border); }
.challenge-preview__art { flex: 0 0 80px; display: grid; place-items: center; }
.challenge-preview-book { width: 68px; position: relative; transform: rotate(-6deg); }
.challenge-preview-book__cover { position: relative; display: block; aspect-ratio: 2/3; border-radius: 3px; overflow: hidden; border-left: 4px solid #103443; box-shadow: 4px 2px 0 #e3e8df, 9px 7px 24px #0008; }
.challenge-preview-book img { width: 100%; height: 100%; object-fit: cover; }
.challenge-preview-book__cover::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, #041a30cc, transparent); }
.challenge-preview-book__brand, .challenge-preview-book__edition, .challenge-preview-book strong { position: absolute; z-index: 1; left: 6px; right: 3px; color: white; }
.challenge-preview-book__brand { top: 5px; font-size: 4px; }
.challenge-preview-book strong { top: 24px; font-size: 8px; line-height: 1.1; }
.challenge-preview-book__edition { bottom: 7px; font-size: 4px; color: var(--challenge-yellow); }
.challenge-preview__copy { display: grid; gap: 6px; }
.challenge-preview__copy strong { font-size: 23px; font-family: "Caveat", cursive; color: var(--challenge-yellow); }
.challenge-preview__copy strong br { display: none; }
.challenge-preview__copy p { font-size: 14px; color: var(--challenge-muted); }
.challenge-roadmap-wrap { max-width: 1176px; margin: 50px auto 60px; }
.challenge-roadmap__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; }
.challenge-roadmap__head > div > span, .challenge-history__head > div > span { display: block; font-size: 11px; text-transform: uppercase; color: var(--challenge-cyan); font-weight: 900; margin-bottom: 8px; }
.challenge-roadmap__progress { font-size: 13px; color: var(--challenge-yellow); white-space: nowrap; }
.challenge-journey-status { display: flex; gap: 16px; flex-wrap: wrap; justify-content: space-between; margin: 16px 0 12px; color: var(--challenge-muted); font-size: 13px; }
#challengeSyncStatus { font-size: 11px; color: #8da9b6; }
progress { display: block; border: 0; appearance: none; overflow: hidden; border-radius: 8px; height: 5px; background: #ffffff12; color: var(--challenge-cyan); }
progress::-webkit-progress-bar { background: #ffffff12; }
progress::-webkit-progress-value { background: var(--challenge-cyan); border-radius: 8px; }
progress::-moz-progress-bar { background: var(--challenge-cyan); }
.challenge-journey-meter { width: 100%; margin-bottom: 26px; }
.challenge-roadmap { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; scroll-margin-top: 30px; }
.challenge-day { --day-accent: #64b7ce; position: relative; min-width: 0; min-height: 158px; display: flex; flex-direction: column; gap: 12px; padding: 16px 14px; text-align: left; background: #102b35; border: 1px solid #ffffff1b; border-top: 3px solid var(--day-accent); border-radius: 8px; transition: border-color .18s, background .18s; }
.challenge-day:hover { background: #1c3a43; border-color: var(--day-accent); }
.challenge-day__num { display: flex; justify-content: space-between; align-items: center; font-size: 10px; font-weight: 900; text-transform: uppercase; color: #bed4db; }
.challenge-day__num i { display: grid; place-items: center; height: 24px; width: 24px; font-size: 15px; font-style: normal; color: var(--day-accent); background: #ffffff0d; border-radius: 50%; }
.challenge-day > strong { font-size: 14px; line-height: 1.35; font-weight: 800; overflow-wrap: anywhere; }
.challenge-day__detail { margin-top: auto; display: grid; gap: 5px; font-size: 10px; line-height: 1.35; color: #a9c3cc; }
.challenge-day.is-free { --day-accent: var(--challenge-yellow); }
.challenge-day.is-locked { background: #0c202a; }
.challenge-day.is-current { background: #193e43; outline: 1px solid var(--challenge-yellow); outline-offset: 2px; }
.challenge-day.is-complete { --day-accent: var(--challenge-green); background: #123b35; }
.challenge-day.is-special--violet { --day-accent: #bfacff; background: #28223f; }
.challenge-day.is-special--orange { --day-accent: #ffba7a; background: #392b24; }
.challenge-day.is-special--pink { --day-accent: #fbaaD7; background: #392539; }
.challenge-day.is-special--teal { --day-accent: #72e8cc; background: #103a34; }
.challenge-day.is-special--red { --day-accent: #ff8e97; background: #3a252e; }
.challenge-day__special { font-size: 10px; color: var(--day-accent); font-weight: 900; text-transform: uppercase; }
.challenge-roadmap__legend { display: flex; flex-wrap: wrap; gap: 18px; font-size: 11px; color: var(--challenge-muted); margin-top: 22px; }
.challenge-roadmap__legend span { display: flex; align-items: center; gap: 7px; }
.challenge-roadmap__legend i { width: 14px; height: 3px; border-radius: 2px; background: #64b7ce; }
.challenge-roadmap__legend .is-free { background: var(--challenge-yellow); }
.challenge-roadmap__legend .is-complete { background: var(--challenge-green); }
.challenge-roadmap__legend .is-special { background: #fbaaD7; }
.challenge-offer { display: flex; align-items: center; justify-content: space-between; gap: 32px; margin: 0 auto; padding: 44px max(32px, calc((100% - 1176px)/2)); background: #102832; border-top: 1px solid var(--challenge-border); }
.challenge-offer > div:first-child { max-width: 670px; }
.challenge-offer h2 { margin: 10px 0 14px; }
.challenge-offer p { color: var(--challenge-muted); max-width: 580px; }
.challenge-offer__price { display: grid; gap: 8px; text-align: center; min-width: 218px; }
.challenge-offer__price > span { font-size: 12px; color: var(--challenge-muted); }
.challenge-offer__price > strong { color: var(--challenge-yellow); font-size: 36px; line-height: 1.2; }
.challenge-page.is-playing .challenge-header { display: none; }
.challenge-player { min-height: 100svh; }
.challenge-scene { position: relative; isolation: isolate; min-height: 100svh; padding: 0 28px 46px; background-color: #061c28; background-size: cover; background-position: center; }
.challenge-scene__shade { position: absolute; inset: 0; z-index: -1; pointer-events: none; background: linear-gradient(90deg, #04121ce0, #04121caa 60%, #04121c66), linear-gradient(0deg, #04121ce0, transparent 55%); }
.challenge-player-top { position: relative; z-index: 2; display: grid; grid-template-columns: 100px 1fr auto; align-items: center; gap: 20px; min-height: 88px; padding: 14px 0; border-bottom: 1px solid #ffffff20; }
.challenge-player-title { text-align: center; }
.challenge-player-title > span { display: none; }
.challenge-player-title strong { color: var(--challenge-cyan); font-size: 17px; text-transform: uppercase; }
.challenge-player-round { display: flex; align-items: center; justify-content: center; gap: 8px; font-size: 11px; color: var(--challenge-muted); margin-top: 5px; }
.challenge-player-round span { color: var(--challenge-yellow); }
.challenge-player-round i { width: 3px; height: 3px; border-radius: 50%; background: #a4b8c2; }
.challenge-player-badges { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; max-width: 380px; font-size: 10px; font-weight: 900; }
.challenge-player-category { color: var(--challenge-cyan); display: flex; gap: 5px; align-items: center; }
.challenge-player-category i { font-size: 18px; font-style: normal; }
.challenge-player-difficulty { color: var(--challenge-yellow); }
.challenge-demo-badge { border-left: 1px solid #ffffff38; padding-left: 10px; color: var(--challenge-muted); }
.challenge-playbar { width: min(770px, calc(100% - 260px)); margin: 18px auto 0; display: flex; align-items: center; justify-content: space-between; gap: 12px; color: #b8d0db; font-size: 12px; }
.challenge-exit { background: none; border: 0; padding: 8px 0; font-size: 12px; font-weight: 800; min-height: 40px; }
.challenge-player-tools { display: flex; align-items: center; gap: 12px; }
.challenge-player-tools .icon-button { width: 34px; height: 34px; flex-basis: 34px; font-size: 16px; }
#challengePoints { color: var(--challenge-yellow); font-variant-numeric: tabular-nums; }
.challenge-question-count { font-variant-numeric: tabular-nums; }
.challenge-progress-track { height: 3px; width: min(770px, calc(100% - 260px)); background: #ffffff18; margin: 8px auto 0; border-radius: 2px; overflow: hidden; }
.challenge-progress-track > span { display: block; height: 100%; width: 0; background: var(--challenge-cyan); transition: width .25s; }
.challenge-question-steps { position: absolute; top: 136px; left: 32px; display: flex; flex-direction: column; gap: 6px; z-index: 2; }
.challenge-question-steps button { width: 30px; height: 30px; padding: 0; display: grid; place-items: center; border: 1px solid #ffffff2b; border-radius: 50%; background: #071d2bd9; color: #adc5d5; font-size: 11px; font-weight: 900; }
.challenge-question-steps button.is-complete { background: #236d51; border-color: var(--challenge-green); color: #d8fff2; }
.challenge-question-steps button.is-missed { background: #5d293d; border-color: var(--challenge-red); color: #ffdde3; }
.challenge-question-steps button.is-current { outline: 2px solid var(--challenge-yellow); outline-offset: 3px; color: white; }
.challenge-question-steps button:disabled { opacity: .65; }
.challenge-visual-symbol { position: absolute; right: 7%; top: 30%; font-size: 160px; opacity: .15; z-index: -1; }
.challenge-photo-credit { position: absolute; left: 28px; bottom: 15px; color: #c2d6e5; font-size: 10px; }
.challenge-page.is-playing .challenge-question-shell { position: relative; width: min(770px, calc(100% - 260px)); margin: 30px auto 0; }
.challenge-question-meta { display: none; }
#challengeQuestion { font-size: 38px; line-height: 1.25; text-align: center; font-weight: 800; text-wrap: balance; min-height: 94px; margin: 0 0 28px; outline: none; text-shadow: 0 2px 18px #0008; }
.challenge-options { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.challenge-option { display: flex; align-items: center; gap: 15px; padding: 20px; min-height: 85px; text-align: left; border: 1px solid #84d0e36b; border-radius: 14px; background: #0e2d3cdc; color: #eff9ff; font-size: 17px; font-weight: 800; transition: border-color .15s, background .15s; }
.challenge-option:hover:not(:disabled) { border-color: #b5f7ee; background: #204853f0; }
.challenge-option > span:last-child { min-width: 0; overflow-wrap: anywhere; }
.challenge-option__letter { display: grid; place-items: center; flex: 0 0 30px; width: 30px; height: 30px; border-radius: 50%; background: #ffffff0d; color: var(--challenge-cyan); font-size: 16px; }
.challenge-option.is-correct { background: #0c5848f2; border-color: var(--challenge-green); }
.challenge-option.is-wrong { background: #61283cf0; border-color: var(--challenge-red); }
.challenge-option.is-muted { background: #0a2130c4; color: #9aafbc; border-color: #ffffff22; }
.challenge-reveal { margin-top: 24px; padding-top: 22px; border-top: 1px solid #ffffff25; animation: revealAnswer .25s ease-out both; }
.challenge-reveal__status { font-size: 15px; font-weight: 900; color: var(--challenge-green); margin-bottom: 15px; }
.challenge-reveal__status.is-wrong { color: #ffacb6; }
.challenge-reveal__explanation { border-left: 2px solid var(--challenge-cyan); padding: 0 0 0 16px; }
.challenge-reveal__explanation > span, .challenge-mind-boost__label { font-size: 10px; font-weight: 900; text-transform: uppercase; color: var(--challenge-cyan); }
.challenge-reveal__explanation p { font-size: 15px; line-height: 1.7; margin-top: 5px; color: #e0edf3; text-shadow: 0 1px 7px #000; }
.challenge-mind-boost { display: flex; gap: 12px; margin-top: 20px; padding: 14px 0; }
.challenge-mind-boost > div { min-width: 0; flex: 1; }
.challenge-mind-boost__label { color: var(--challenge-yellow); }
#challengeMindBoost { font-family: "Caveat", cursive; font-size: 28px; font-weight: 600; line-height: 1.3; color: #fff2bf; margin-top: 10px; min-height: 70px; }
.challenge-bookmark { background: #18343ece; color: var(--challenge-yellow); width: 36px; height: 36px; flex-basis: 36px; font-size: 19px; }
.is-saved { color: var(--challenge-yellow); border-color: var(--challenge-yellow); }
.challenge-reveal__actions { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-top: 22px; }
#challengeSource { color: #abc0ce; font-size: 10px; max-width: 55%; overflow-wrap: anywhere; }
#nextChallengeQuestion { flex-shrink: 0; }
.challenge-summary { max-width: 1100px; width: calc(100% - 64px); margin: 50px auto 70px; }
.challenge-summary__hero { padding-bottom: 36px; border-bottom: 1px solid var(--challenge-border); }
.challenge-summary__hero h1 { font-size: 42px; max-width: 840px; margin: 14px 0; text-wrap: balance; }
.challenge-summary__hero > p { color: var(--challenge-muted); max-width: 760px; }
.challenge-summary__stats { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 24px; margin: 30px 0; }
.challenge-summary__stats > span { display: grid; font-size: 12px; color: var(--challenge-muted); border-left: 1px solid var(--challenge-border); padding-left: 18px; }
.challenge-summary__stats strong { color: var(--challenge-cyan); font-size: 30px; font-weight: 900; line-height: 1.3; }
.challenge-summary__stats > span:nth-child(2) strong { color: var(--challenge-yellow); }
.challenge-summary__stats > span:nth-child(4) strong { color: #ffb6bb; }
.challenge-summary__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.challenge-knowledge { display: grid; grid-template-columns: 240px 1fr; gap: 35px; padding: 35px 0; border-bottom: 1px solid var(--challenge-border); }
.challenge-knowledge h2 { font-size: 25px; margin-top: 10px; }
.challenge-knowledge__bars { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px 30px; }
.challenge-knowledge__row { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 8px 12px; font-size: 12px; }
.challenge-knowledge__row > span { color: var(--challenge-muted); }
.challenge-knowledge__row strong { color: var(--challenge-cyan); }
.challenge-knowledge__row progress { grid-column: 1/-1; width: 100%; }
.challenge-practice-result { border-left: 3px solid var(--challenge-green); padding: 14px 18px; margin-top: 24px; background: #134134; }
.challenge-history { margin-top: 40px; }
.challenge-history__head { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 22px; }
.challenge-history__head h2 { font-size: 26px; }
.challenge-history__filters { display: flex; gap: 2px; background: #112b35; padding: 4px; border-radius: 8px; }
.challenge-history__filters button { padding: 9px 14px; border: 0; border-radius: 5px; background: none; color: var(--challenge-muted); font-size: 12px; }
.challenge-history__filters .is-active { color: #092027; background: var(--challenge-cyan); font-weight: 900; }
.challenge-history__list { display: grid; gap: 12px; }
.challenge-history-item { display: grid; grid-template-columns: 22px minmax(0,1fr) 40px; gap: 16px; padding: 24px; background: #102a34; border: 1px solid #ffffff18; border-radius: 8px; }
.challenge-history-item__status { color: var(--challenge-green); font-weight: 900; }
.challenge-history-item.is-wrong .challenge-history-item__status { color: var(--challenge-red); }
.challenge-history-item h3 { font-size: 17px; line-height: 1.4; margin-bottom: 10px; }
.challenge-history-item p { font-size: 14px; line-height: 1.65; color: #becfd7; margin-top: 7px; }
.challenge-history-item__boost { color: var(--challenge-yellow) !important; }
.challenge-history-item__source { font-size: 10px !important; color: #8faab7 !important; }
.challenge-history__empty { color: var(--challenge-muted); padding: 32px 0; }
.challenge-dialog { width: min(470px, calc(100% - 32px)); padding: 36px; border: 1px solid #689baa66; border-radius: 8px; color: var(--challenge-text); background: #102b36; box-shadow: 0 30px 100px #0008; }
.challenge-dialog::backdrop { background: #001015bd; backdrop-filter: blur(6px); }
.challenge-dialog h2 { font-size: 30px; margin: 14px 0; }
.challenge-dialog p { font-size: 14px; color: var(--challenge-muted); margin-bottom: 20px; }
.challenge-dialog__close { position: absolute; right: 14px; top: 14px; width: 32px; height: 32px; font-size: 20px; }
.challenge-dialog .challenge-kicker { display: block; padding-right: 30px; }
.challenge-dialog .challenge-primary { width: 100%; }
.challenge-dialog form { display: grid; gap: 12px; }
.challenge-dialog label { font-size: 12px; color: #d9e7ee; }
.challenge-dialog input { min-width: 0; width: 100%; border: 1px solid #88bdce66; background: #061a25; color: white; padding: 13px; border-radius: 6px; font-size: 15px; }
.challenge-form-status { margin: 0 !important; color: var(--challenge-red) !important; }
.challenge-form-status.is-success { color: var(--challenge-green) !important; }
.challenge-notice { position: fixed; bottom: max(20px, env(safe-area-inset-bottom)); left: 50%; transform: translateX(-50%); width: min(680px, calc(100% - 32px)); z-index: 40; display: flex; align-items: center; gap: 14px; padding: 14px 18px; background: #f0f8f5; color: #173a44; border: 1px solid #9dc4ca; border-radius: 8px; box-shadow: 0 12px 40px #0005; font-size: 14px; }
.challenge-notice > span { flex: 1; }
.challenge-notice .challenge-text-button { color: #124c65; flex-shrink: 0; }
.challenge-notice .icon-button { background: #163a44; width: 30px; height: 30px; flex-basis: 30px; }
.is-loading-day .challenge-roadmap { opacity: .65; pointer-events: none; }
.is-loading-day #startChallengeBtn { opacity: .7; pointer-events: none; }
@keyframes revealAnswer { from { opacity: 0; } to { opacity: 1; } }
@media (min-width: 1400px) {
  .challenge-page.is-playing .challenge-question-shell { width: 770px; }
  .challenge-mind-boost { position: fixed; left: calc(50% + 418px); top: 245px; width: min(280px, calc(50% - 445px)); margin: 0; border-top: 1px solid #ffe06073; padding-top: 16px; transform: rotate(-2deg); }
  #challengeMindBoost { min-height: 160px; font-size: 29px; text-shadow: 0 2px 12px #000; }
  .challenge-mind-boost .challenge-bookmark { position: absolute; top: -45px; right: 0; }
}
@media (max-width: 1240px) {
  .challenge-roadmap-wrap, .challenge-preview { width: calc(100% - 64px); }
  .challenge-roadmap { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .challenge-player-top { grid-template-columns: 86px 1fr; }
  .challenge-player-badges { grid-column: 2; justify-content: center; max-width: none; margin-top: -8px; }
  .challenge-player-brand { grid-row: span 2; }
  .challenge-playbar, .challenge-progress-track, .challenge-page.is-playing .challenge-question-shell { width: min(760px, calc(100% - 100px)); margin-left: auto; margin-right: auto; }
  #challengeQuestion { font-size: 32px; }
  .challenge-question-steps { left: 18px; top: 160px; }
}
@media (max-width: 900px) {
  .challenge-roadmap { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .challenge-header__back { display: none; }
  .challenge-dashboard__intro h1 { font-size: 48px; }
  .challenge-dashboard__intro { min-height: 540px; background-position: 65% center; }
  .challenge-day { min-height: 155px; }
  .challenge-knowledge { grid-template-columns: 1fr; gap: 22px; }
  .challenge-summary__hero h1 { font-size: 36px; }
}
@media (max-width: 680px) {
  .challenge-header { width: calc(100% - 32px); min-height: 72px; grid-template-columns: 68px 1fr 42px; gap: 10px; }
  .challenge-logo { width: 65px; height: 46px; }
  .challenge-header__title strong { font-size: 12px; }
  .challenge-header__title span { font-size: 9px; }
  .challenge-header__actions { gap: 0; }
  .challenge-dashboard__intro { padding: 38px 24px 30px; min-height: 520px; }
  .challenge-dashboard__intro h1 { font-size: 42px; }
  .challenge-dashboard__intro > p { font-size: 16px; max-width: 380px; }
  .challenge-value-row { gap: 25px; }
  .challenge-value-row strong { font-size: 20px; }
  .challenge-value-row > span { font-size: 11px; }
  .challenge-preview { width: calc(100% - 40px); gap: 16px; padding-top: 18px; }
  .challenge-preview__copy strong { font-size: 23px; }
  .challenge-preview__copy strong br { display: initial; }
  .challenge-preview__copy p { font-size: 12px; }
  .challenge-roadmap-wrap { width: calc(100% - 40px); margin-top: 34px; }
  .challenge-roadmap__head { gap: 12px; }
  .challenge-roadmap__head h2 { font-size: 25px; }
  .challenge-roadmap__progress { font-size: 10px; }
  .challenge-roadmap { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; }
  .challenge-day { min-height: 156px; padding: 14px 12px; }
  .challenge-offer { flex-direction: column; align-items: stretch; gap: 24px; padding: 32px 24px; }
  .challenge-offer h2 { font-size: 28px; }
  .challenge-offer__price { max-width: 360px; width: 100%; margin: 0 auto; }
  .challenge-player-top { grid-template-columns: 50px 1fr; min-height: 90px; padding: 12px 0; gap: 8px; }
  .challenge-player-brand { width: 46px; height: 42px; }
  .challenge-player-title strong { font-size: 12px; }
  .challenge-player-round { font-size: 9px; flex-wrap: wrap; }
  .challenge-player-badges { font-size: 8px; gap: 7px; margin-top: 0; }
  .challenge-player-category i { display: none; }
  .challenge-demo-badge { padding-left: 6px; }
  .challenge-scene { padding: 0 18px 36px; }
  .challenge-scene__shade { background: #041723c4; }
  .challenge-question-steps { position: static; flex-direction: row; gap: 9px; padding: 12px 5px; margin: 8px 0 0; overflow-x: auto; scrollbar-width: thin; }
  .challenge-question-steps button { flex: 0 0 30px; }
  .challenge-playbar, .challenge-progress-track, .challenge-page.is-playing .challenge-question-shell { width: 100%; }
  .challenge-playbar { margin-top: 0; font-size: 10px; gap: 6px; }
  .challenge-player-tools { gap: 8px; }
  .challenge-playbar .challenge-exit { font-size: 11px; }
  .challenge-page.is-playing .challenge-question-shell { margin-top: 24px; }
  #challengeQuestion { font-size: 27px; min-height: 0; margin-bottom: 24px; }
  .challenge-options { grid-template-columns: 1fr; gap: 10px; }
  .challenge-option { min-height: 64px; padding: 14px 16px; font-size: 16px; gap: 13px; border-radius: 14px; }
  .challenge-reveal { padding-top: 18px; margin-top: 20px; }
  .challenge-reveal__explanation p { font-size: 14px; }
  .challenge-mind-boost { margin-top: 12px; }
  #challengeMindBoost { font-size: 27px; }
  .challenge-reveal__actions { flex-direction: column; align-items: stretch; gap: 16px; margin-top: 10px; }
  #challengeSource { max-width: 100%; font-size: 10px; }
  #nextChallengeQuestion { width: 100%; }
  .challenge-photo-credit { left: 18px; bottom: 8px; }
  .challenge-summary { width: calc(100% - 40px); margin-top: 30px; }
  .challenge-summary__hero h1 { font-size: 32px; }
  .challenge-summary__stats { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px; }
  .challenge-summary__stats strong { font-size: 28px; }
  .challenge-summary__actions { display: grid; }
  .challenge-history__head { flex-direction: column; align-items: stretch; gap: 20px; }
  .challenge-history__filters { align-self: flex-start; }
  .challenge-history-item { grid-template-columns: 16px minmax(0,1fr); gap: 12px; padding: 18px 16px; position: relative; }
  .challenge-history-item h3 { padding-right: 28px; font-size: 16px; }
  .challenge-history-item__bookmark { position: absolute; right: 10px; top: 12px; width: 30px; height: 30px; font-size: 17px; }
  .challenge-history-item p { font-size: 13px; }
  .challenge-dialog { padding: 30px 24px; }
  .challenge-dialog h2 { font-size: 26px; }
}
@media (max-width: 440px) {
  .challenge-dashboard__intro h1 { font-size: 38px; }
  .challenge-roadmap__head { align-items: flex-start; }
  .challenge-roadmap__head h2 { font-size: 23px; }
  .challenge-player-badges { justify-content: flex-start; }
  .challenge-player-title strong { font-size: 11px; }
  #challengeQuestion { font-size: 25px; }
  .challenge-knowledge__bars { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}