/* All activity styles are scoped; the homepage uses only the teaser styles. */
.brain-room {--ink:#203d4a;--muted:#566b74;--green:#285e56;--line:#dbe4df;color:var(--ink);font-size:17px;line-height:1.65;letter-spacing:-.35px;padding:90px 0 75px}
.brain-room *,.brain-teaser * {box-sizing:border-box}
.brain-room [hidden] {display:none!important}
.brain-room button,.brain-room select,.brain-room input {font:inherit}
.brain-room button {cursor:pointer}
.brain-room button:disabled {cursor:default;opacity:.55}
.brain-room button:focus-visible,.brain-room a:focus-visible,.brain-room select:focus-visible {outline:3px solid #245faa;outline-offset:4px}
.brain-room h1,.brain-room h2,.brain-room h3,.brain-room p {margin:0}
.brain-crumb {display:flex;gap:12px;font-size:14px;color:var(--muted);margin-bottom:26px}
.brain-hero {background:#f5f3ec;border-radius:24px;padding:48px 50px;display:grid;grid-template-columns:1.15fr 1fr;align-items:center;overflow:hidden;gap:12px}
.brain-room .brain-eyebrow {color:#4d7569;font-size:14px;font-weight:600;letter-spacing:.3px;margin-bottom:9px}
.brain-hero h1 {font-size:48px;line-height:1.28;letter-spacing:-2px;font-weight:700}
.brain-room .brain-intro {margin:22px 0 26px;color:var(--muted);font-size:18px}
.brain-btn {display:inline-flex;justify-content:center;align-items:center;gap:24px;min-height:52px;border:1px solid #becfc8;background:white;border-radius:10px;padding:12px 23px;color:var(--ink);font-weight:600}
.brain-room .brain-primary {background:var(--green);color:white;border-color:var(--green)}
.brain-room .brain-primary:hover {background:#1c4c46}
.brain-room .brain-hero-note {font-size:14px;color:#586e6a;margin-top:13px}
.brain-hero-art {width:100%;height:auto;max-width:460px;justify-self:center}
.brain-room .brain-notice {font-size:14px;color:#617079;padding:18px 4px 28px;line-height:1.7}
.brain-layout {display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:30px;margin:6px 0 38px}
.brain-section-head {display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:12px}
.brain-room h2 {font-size:25px;line-height:1.45;letter-spacing:-1px}
.brain-level {font-size:13px;color:var(--muted);flex-shrink:0}
.brain-level select {display:block;background:white;border:1px solid var(--line);padding:9px 30px 9px 12px;border-radius:8px;color:var(--ink);font-size:15px;min-height:44px;margin-top:4px}
.brain-subtle {color:var(--muted);font-size:14px}
.brain-cards {display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;margin-top:25px}
.brain-choice {display:flex;align-items:flex-start;flex-direction:column;border:1px solid var(--line);border-radius:15px;background:#fff;padding:15px;text-align:left;min-width:0;color:var(--ink);transition:box-shadow .2s,transform .2s}
.brain-choice:hover {box-shadow:0 8px 22px #244c4412;transform:translateY(-3px)}
.brain-choice-art {display:flex;align-items:center;justify-content:center;gap:8px;align-self:stretch;height:104px;border-radius:10px;font-size:47px;line-height:1;color:#685d89;margin-bottom:20px}
.brain-choice-art small {font-size:30px}
.brain-peach {background:#f7eee2}.brain-lavender {background:#eeebf6}.brain-mint {background:#e8f1eb;color:#437363;font-size:36px}
.brain-choice-tag {font-size:12px;color:var(--muted);margin-bottom:4px}
.brain-choice strong {font-size:19px;letter-spacing:-.6px;margin-bottom:10px}
.brain-choice>span:not([class]) {font-size:14px;color:var(--muted);line-height:1.8;word-break:keep-all}
.brain-choice-go {border-top:1px solid #e7ece8;padding-top:13px;margin-top:22px;font-size:14px;display:flex;justify-content:space-between;align-self:stretch;color:var(--green)}
.brain-room .brain-tip {background:#f6f8f5;border-radius:10px;padding:17px 20px;font-size:14px;margin-top:22px;color:var(--muted)}
.brain-tip strong {color:var(--ink);display:block;margin-bottom:3px}
.brain-record {padding:23px;background:#f7f9f7;border:1px solid var(--line);border-radius:16px;align-self:start}
.brain-record h2 {font-size:21px}
.brain-room .brain-progress {font-size:14px;margin:14px 0 10px;font-weight:600;color:var(--green)}
.brain-daily-checks {display:flex;gap:5px;font-size:12px;margin-bottom:20px;flex-wrap:wrap}
.brain-daily-checks span {padding:4px 8px;border-radius:5px;background:#e9eeeb;color:#54665f}
.brain-daily-checks .done {background:#285e56;color:white}
.brain-calendar-head {display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:10px;margin-bottom:8px}
.brain-calendar-head h3 {font-size:16px}.brain-calendar-head button {background:transparent;border:0;color:var(--green);font-size:28px;width:44px;height:44px}
.brain-calendar {display:grid;grid-template-columns:repeat(7,1fr);gap:4px;text-align:center;font-size:13px;margin-bottom:14px}
.brain-calendar span {display:flex;align-items:center;justify-content:center;min-height:27px;border-radius:50%;aspect-ratio:1}
.brain-calendar .weekday {color:var(--muted);font-size:12px}.brain-calendar .participated {background:#285e56;color:white}.brain-calendar [aria-current=date] {box-shadow:inset 0 0 0 1px #285e56;font-weight:bold}
.brain-room .brain-record-note {font-size:12px;line-height:1.8;color:var(--muted);margin:15px 0 6px}
.brain-text-btn {border:0;background:transparent;text-decoration:underline;text-underline-offset:4px;color:#46645b;min-height:44px;padding:6px 0;font-size:14px!important}
.brain-record #brain-clear-confirm {font-size:14px;border-top:1px solid var(--line);padding-top:15px}
.brain-game {border:1px solid var(--line);border-radius:16px;padding:25px;margin-top:22px;scroll-margin-top:110px;background:#fff}
.brain-game-top {display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted)}
.brain-game h3 {font-size:27px;line-height:1.4;margin:12px 0!important;scroll-margin-top:130px;outline:none}
.brain-board {display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:24px}
.brain-tile {border:2px solid #dce5df;border-radius:12px;background:#f8faf7;color:var(--ink);min-height:104px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:9px 5px;font-size:16px!important;position:relative}
.brain-tile .brain-symbol {font-size:35px;line-height:1.25}.brain-tile[aria-pressed=true] {border-color:#285e56;background:#e5f0e7;box-shadow:inset 0 0 0 1px #285e56}.brain-tile[aria-pressed=true]:after {content:'✓';position:absolute;top:1px;right:6px;color:#285e56;font-size:17px}
.brain-tile.is-covered {background:#eff1f8;color:#667487;font-size:30px!important}.brain-room .brain-tile.is-matched {opacity:1;border-style:dashed;background:#eaf2ed;color:#426a5c}
.brain-board.sequence-board {grid-template-columns:repeat(3,1fr);max-width:420px;margin-inline:auto}
.brain-board.sequence-board .brain-tile {min-height:85px;font-size:22px!important}
.brain-room .brain-tile.is-highlighted {opacity:1;background:#285e56;color:white;border:3px solid #183c36;box-shadow:0 0 0 3px #bdcebf}
.brain-room .brain-feedback {color:#355f54;min-height:29px;margin:17px 0 10px;font-size:16px}
.brain-actions {display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
.brain-result {grid-column:1/-1;padding:24px;background:#f1f6ee;border-radius:12px;color:#244e40;text-align:center}
.brain-result strong {display:block;font-size:22px;margin-bottom:8px}.brain-result p {font-size:16px}
.brain-answer-list {grid-column:1/-1;font-size:15px;color:var(--muted)}
.brain-share {background:#edf3f2;border-radius:17px;padding:30px 35px;display:flex;justify-content:space-between;gap:25px;align-items:center}
.brain-share p:not(.brain-eyebrow) {font-size:15px;color:var(--muted);margin-top:8px}.brain-share-actions {text-align:center;min-width:220px}.brain-share-actions>button {display:block;margin-inline:auto}.brain-share input {width:100%;font-size:12px;padding:8px}.brain-share label {font-size:12px}
.brain-guidance {padding-top:48px}.brain-guidance>p:not(.brain-eyebrow) {color:var(--muted);font-size:16px;max-width:920px;margin-top:16px}
.brain-guide-links {display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:24px}
.brain-guide-links a {display:flex;flex-direction:column;gap:6px;border:1px solid var(--line);border-radius:10px;padding:18px 22px;color:var(--ink)}.brain-guide-links a:hover {background:#f6f8f5}.brain-guide-links span {font-size:14px;color:var(--muted)}
.brain-guidance .brain-evidence {font-size:13px!important;margin-top:25px!important}.brain-evidence a {text-decoration:underline;color:var(--green)}
.brain-teaser {display:flex;align-items:center;justify-content:space-between;gap:25px;border-radius:20px;background:#f1f4ed;margin:35px auto 60px;padding:30px 40px;color:#203d4a;line-height:1.6}
.brain-teaser p {font-size:15px;color:#526b61}.brain-teaser h2 {font-size:29px;margin:4px 0 10px;letter-spacing:-1px}.brain-teaser a {display:inline-block;background:#285e56;color:white;border-radius:9px;padding:10px 19px;font-size:16px;margin-top:14px}.brain-teaser img {width:245px;height:auto}
@media(min-width:1024px) {body:has(.brain-room) #header {background:#fff;border-bottom:1px solid #e6ece8}body:has(.brain-room) #header a {color:#273c52}}
@media(max-width:1100px) {.brain-hero {padding:35px}.brain-hero h1 {font-size:42px}.brain-layout {grid-template-columns:minmax(0,1fr) 250px;gap:20px}.brain-choice {padding:12px}.brain-choice strong {font-size:17px}}
@media(max-width:850px) {.brain-layout {grid-template-columns:1fr}.brain-record {display:block;max-width:none}.brain-calendar {max-width:360px;margin-inline:auto}.brain-calendar-head {max-width:360px;margin-inline:auto}.brain-record-note {max-width:550px}.brain-hero {grid-template-columns:1.35fr 1fr;padding:30px}.brain-hero h1 {font-size:38px}.brain-intro br {display:none}.brain-hero .brain-intro {font-size:16px}.brain-share {padding:26px}.brain-choice strong {font-size:20px}.brain-choice-art {height:120px}}
@media(max-width:600px) {.brain-room {font-size:16px;padding:42px 0 40px}.brain-crumb {margin-bottom:17px}.brain-hero {grid-template-columns:1fr;padding:29px 24px;gap:0}.brain-hero h1 {font-size:38px}.brain-hero-art {width:210px;margin-top:12px}.brain-hero .brain-intro {margin:17px 0 20px}.brain-room .brain-eyebrow {font-size:12px}.brain-hero .brain-btn {width:100%}.brain-hero-copy {position:relative;z-index:1}.brain-room h2 {font-size:23px}.brain-section-head {align-items:flex-start}.brain-level {max-width:137px}.brain-level select {font-size:14px;padding:8px}.brain-cards {grid-template-columns:1fr;gap:12px;margin-top:20px}.brain-choice {display:grid;grid-template-columns:83px 1fr;column-gap:16px;padding:17px}.brain-choice-art {grid-column:1;grid-row:1/5;height:100%;min-height:126px;margin:0;font-size:36px;flex-direction:column}.brain-choice-art small {font-size:23px}.brain-choice strong {font-size:20px;margin:0 0 3px}.brain-choice-go {margin-top:9px;padding-top:8px}.brain-choice>span:not([class]) {font-size:14px}.brain-game {padding:17px}.brain-game h3 {font-size:24px}.brain-board {gap:7px;grid-template-columns:repeat(3,minmax(0,1fr))}.brain-tile {min-height:92px;font-size:15px!important}.brain-tile .brain-symbol {font-size:32px}.brain-actions .brain-btn {flex:1;min-width:135px;padding:12px}.brain-share {display:block;padding:25px}.brain-share-actions {margin-top:20px}.brain-guide-links {grid-template-columns:1fr}.brain-guidance {padding-top:35px}.brain-teaser {margin:25px 3% 40px;padding:25px;position:relative;overflow:hidden}.brain-teaser h2 {font-size:25px}.brain-teaser img {display:none}.brain-notice {font-size:13px!important}}
@media(prefers-reduced-motion:reduce) {.brain-choice {transition:none}.brain-choice:hover {transform:none}}