:root{color-scheme:light;--paper:#f7f5ee;--ink:#243a34;--muted:#64726c;--line:#d6dcd2;--green:#285c4b;--green-light:#e8f1e7;--board:#e4ece1;--a:#bad6ed;--a-ink:#284d79;--b:#f0d28e;--b-ink:#765018;--c:#d5c7e9;--c-ink:#614580;--d:#b9dac8;--radius:16px}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 "PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif}main{max-width:1392px;margin:auto;padding:0 36px 48px}a{color:var(--green);text-underline-offset:4px}button,select{font:inherit}button{cursor:pointer}button,select{color:var(--ink);background:#fffdf7;border:1px solid #cbd5c8;border-radius:9px;padding:9px 14px;line-height:1.45}button:hover{border-color:var(--green)}button:focus-visible,select:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid #306a9a;outline-offset:4px}button[aria-disabled=true]{cursor:help}h1,h2,h3,p{margin:0}h1{font-family:"Noto Serif CJK SC","Songti SC",serif;font-size:42px;line-height:1.3;font-weight:700;letter-spacing:.03em}h2{font-size:22px;line-height:1.4}h3{font-size:16px}[hidden]{display:none!important}.skip-link{position:absolute;top:-80px;left:12px;z-index:40;background:white;padding:12px}.skip-link:focus{top:8px}.library-nav{display:flex;align-items:center;gap:14px;min-height:60px;border-bottom:1px solid var(--line);font-size:13px}.library-nav>a:first-child{font-weight:700}.library-nav span{color:#929a91}.nav-end{margin-left:auto}.page-header{display:flex;justify-content:space-between;gap:24px;align-items:center;padding:28px 0 24px}.eyebrow{font-size:12px;color:var(--green);letter-spacing:.08em;font-weight:600;margin-bottom:6px}.prototype-badge{display:inline-block;font:12px/1.5 "PingFang SC",sans-serif;vertical-align:middle;border:1px solid #c0cdbd;border-radius:5px;padding:3px 8px;margin-left:16px;letter-spacing:0}.intro-copy{margin-top:9px;color:var(--muted)}.chapter-picker{display:grid;gap:6px;min-width:280px;max-width:390px}.chapter-picker label{font-size:12px;color:var(--muted)}.chapter-picker select{font-size:14px;width:100%;padding-right:26px}.progress-copy{font-size:12px;color:var(--muted)}.mission{display:flex;justify-content:space-between;gap:20px;align-items:center;border-top:1px solid var(--line);padding:20px 0 14px}.mission h2{margin-bottom:5px}.mission p:not(.eyebrow){font-size:14px;color:var(--muted)}.mission-actions{display:flex;gap:8px;flex-wrap:wrap}.mission-actions button{font-size:13px;white-space:nowrap}.meaning-strip{display:flex;flex-wrap:wrap;gap:12px 24px;margin:0 0 20px}.meaning{display:flex;align-items:center;gap:8px;font-size:13px}.meaning .avatar{width:28px;height:32px;min-width:28px}.meaning .avatar::before,.meaning .avatar::after{display:none}.meaning .avatar b{font-size:15px;position:static}.game-grid{display:grid;grid-template-columns:minmax(0,1fr) 286px;grid-template-areas:"arena world" "skills world";gap:20px;align-items:start}.arena{grid-area:arena;background:var(--board);border:1px solid #c6d1c3;border-radius:18px;padding:20px;position:relative;min-width:0;box-shadow:inset 0 0 0 5px #eaf0e7}.arena-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:12px;font-size:13px;font-weight:600;color:#466050}.scope-badge{font-size:11px;font-weight:500;background:#f8fbf4;border:1px solid #b6c8b1;padding:3px 8px;border-radius:20px;max-width:70%;overflow-wrap:anywhere}.scope-path{font-size:12px;color:#51654f;margin-bottom:15px;min-height:18px;overflow-wrap:anywhere}.card-zones{display:grid;grid-template-columns:minmax(0,1fr) 232px;gap:26px;align-items:start}.zone-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;gap:8px}.zone-heading h3{font-size:13px;font-weight:600;color:#4f6253}.zone-heading span{font-size:11px;color:#657363}.hand{display:grid;grid-template-columns:repeat(auto-fit,minmax(155px,1fr));gap:12px;align-items:start}.card-shell{position:relative;min-width:0}.card-main{position:relative;width:100%;min-height:178px;text-align:left;display:flex;flex-direction:column;justify-content:space-between;gap:12px;padding:13px 13px 15px;border:1px solid #bbc9b6;border-radius:13px;background:#fffdf5;box-shadow:0 3px 0 #cad3c4,0 7px 14px #2c49300b;transition:transform .15s,box-shadow .15s,border-color .15s}.card-main:hover{transform:translateY(-3px);box-shadow:0 4px 0 #b7c5b2,0 9px 18px #2c493018}.card-main[aria-pressed=true]{border:2px solid var(--green);padding:12px 12px 14px;box-shadow:0 3px 0 #91ad8b,0 0 0 3px #c3d9bb}.card-main[data-candidate=true]{outline:2px dashed #4c7950;outline-offset:4px}.card-main[data-local=true]{background:#fffbeb;border-color:#b7a378}.card-main[data-local=true] .card-kind{color:#7b6431}.card-top{display:flex;justify-content:space-between;gap:8px;align-items:center;width:100%}.card-id{font:12px/1.4 ui-monospace,monospace;color:#687365}.card-kind{font-size:10px;letter-spacing:.04em;color:#647e61}.goal-zone .card-main{min-height:213px;background:#fffef8}.goal-zone .card-kind{color:var(--green);font-weight:700}.card-description{font-size:11px;color:#6c7567;line-height:1.6;text-align:center;overflow-wrap:anywhere}.card-source{margin-top:7px;font-size:11px;color:#5b6956;line-height:1.6}.card-source summary{cursor:pointer;width:fit-content}.card-source ol{padding-left:18px;margin:6px 0;font-size:11px}.formula{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:5px;line-height:1.3;width:100%;min-height:62px}.formula-part{display:inline-flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:4px;max-width:100%;position:relative}.formula-part[data-picked=true]{background:#eaf0df;outline:2px dotted #668c57;outline-offset:4px;border-radius:4px}.formula-group{border:1px solid #dedfce;border-radius:7px;padding:5px 4px}.formula-op{font:24px/1.2 "Cambria Math","STIX Two Math",serif;color:#45564b;flex:0 0 auto}.formula-not{display:inline-flex;align-items:center;gap:1px;border-bottom:2px solid #7b5b51;padding-bottom:3px}.formula-not>.formula-op{font-size:23px}.avatar{width:35px;min-width:35px;height:43px;display:inline-flex;align-items:center;justify-content:center;position:relative;border-radius:12px 12px 15px 15px;background:var(--a);color:var(--a-ink);box-shadow:inset 0 -3px 0 #0000000c;vertical-align:middle;flex:0 0 auto}.avatar::before{content:"";position:absolute;top:9px;left:10px;width:3px;height:4px;background:currentColor;border-radius:50%;box-shadow:10px 0 0 currentColor}.avatar::after{content:"";position:absolute;top:15px;left:14px;width:7px;height:4px;border-bottom:1px solid currentColor;border-radius:0 0 8px 8px}.avatar b{position:relative;top:9px;font:700 17px/1 "Georgia",serif}.avatar[data-atom=B]{background:var(--b);color:var(--b-ink);border-radius:7px 7px 11px 11px}.avatar[data-atom=C]{background:var(--c);color:var(--c-ink);border-radius:17px 17px 9px 9px}.avatar[data-atom=C]::before{height:3px;top:10px}.avatar[data-atom=C]::after{border-radius:0}.empty-hand{font-size:13px;color:#5f705d;padding:25px 12px;border:1px dashed #adbeaa;border-radius:12px;line-height:1.8;min-height:130px}.effect-preview{margin-top:20px;min-height:64px;border-top:1px solid #c3d0be;padding-top:13px;display:grid;grid-template-columns:60px minmax(0,1fr);gap:10px;align-items:center;font-size:12px;color:#4f6250}.preview-label{font-size:11px;color:#63745f}.effect-preview .formula{justify-content:flex-start;min-height:48px}.preview-result{display:flex;align-items:center;flex-wrap:wrap;gap:10px}.preview-result .formula{width:auto}.action-arrows{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none;z-index:5}.action-arrows path.action-path{stroke:#447d65;stroke-width:2.4;fill:none;stroke-linecap:round;filter:drop-shadow(0 1px 1px #fff)}.action-arrows marker path{fill:#447d65}.action-arrows text{font:11px "PingFang SC",sans-serif;fill:#285844;paint-order:stroke;stroke:#f5f8ec;stroke-width:5px;stroke-linejoin:round}.branch-tabs{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:9px}.branch-tabs:empty{display:none}.branch-tabs button{font-size:11px;padding:5px 9px;max-width:100%;text-align:left}.branch-tabs button[aria-pressed=true]{background:var(--green);color:white;border-color:var(--green)}.world-panel{grid-area:world;border-top:2px solid #a9bda4;padding:16px 0;min-width:0}.world-heading{display:flex;justify-content:space-between;gap:8px;align-items:center}.world-heading h2{font-size:19px}.world-heading .eyebrow{font-size:11px;letter-spacing:.03em}.world-count{font:600 22px/1.2 Georgia,serif;color:var(--green);white-space:nowrap}.world-scope{font-size:12px;color:#63705e;margin:14px 0 10px;overflow-wrap:anywhere}.worlds{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.world{background:#e3eddf;border:1px solid #b7cdb1;border-radius:8px;padding:9px 8px;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:7px;transition:background .25s,border-color .25s,opacity .25s}.world[data-kept=false]{background:#ecece6;border-color:#dedfd5;color:#92958a;opacity:.56}.world-value{font-size:11px;display:inline-flex;align-items:center;gap:3px}.world-letter{font-family:Georgia,serif;font-weight:700}.world-letter[data-atom=A]{color:var(--a-ink)}.world-letter[data-atom=B]{color:var(--b-ink)}.world-letter[data-atom=C]{color:var(--c-ink)}.world-change{font-size:12px;margin-top:13px;color:var(--green);font-weight:600}.world-caption{font-size:11px;color:#76806c;line-height:1.8;margin-top:9px}.world-panel details{margin-top:15px;font-size:12px}.world-panel details p{margin-top:10px;line-height:1.8;color:#5e6b58}.world-panel summary{cursor:pointer;font-size:12px}.original-task{margin-top:22px;padding-top:16px;border-top:1px solid var(--line)}.original-task>span{font-size:12px;color:var(--muted)}.original-task .formula{justify-content:flex-start;margin-top:8px;min-height:50px}.original-task p{font-size:11px;color:var(--muted);margin-top:8px}.skill-dock{grid-area:skills;min-width:0}.skill-heading{display:flex;justify-content:space-between;gap:12px;align-items:center;margin:0 0 12px}.skill-heading h2{font-size:21px}.skill-heading button{font-size:12px}.skill-heading button[aria-disabled=true]{color:#849080;background:#f0f0e9}.selection-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:12px}.selection-row p{font-size:13px;font-weight:600}.selection-row label{display:flex;gap:8px;align-items:center;font-size:11px;color:var(--muted)}.selection-row select{font-size:11px;padding:5px 8px;max-width:250px}.skill-reason{font-size:12px;line-height:1.7;background:#eef1e8;border-left:2px solid #8da481;padding:10px 12px;margin-bottom:12px;min-height:60px;overflow-wrap:anywhere}.skill-reason[data-unavailable=true]{border-color:#aeb4a8;background:#edede7;color:#626b5d}.skill-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.skill-button{display:flex;flex-direction:column;gap:4px;align-items:flex-start;text-align:left;border-radius:9px;padding:11px 10px;min-height:69px;position:relative;background:#fffef8;border:1px solid #a9c09f;color:#284832;box-shadow:0 2px 0 #dbe3d2}.skill-button strong{font-size:12px;font-weight:600;line-height:1.5;overflow-wrap:anywhere}.skill-button small{font-size:10px;color:#69815e;line-height:1.5}.skill-button[aria-disabled=true]{background:#eceee7;border-color:#dce0d5;color:#899080;box-shadow:none}.skill-button[aria-disabled=true] small{color:#8c9385}.skill-button[aria-disabled=true]:hover{border-color:#9aa792;background:#e5e9de}.skill-button:not([aria-disabled=true]):hover,.skill-button[data-active=true]{background:#e4efdb;border-color:#4d7945;box-shadow:0 2px 0 #acc29e}.skill-group{margin-top:18px;border-top:1px solid var(--line);padding-top:12px}.skill-group summary{font-size:14px;font-weight:600;cursor:pointer;margin-bottom:10px}.skill-group summary span{font-size:11px;font-weight:400;color:var(--muted);margin-left:10px}.skill-group .skill-button small{font-size:10px}.pending-action{border:1px solid #82a575;background:#e9f2df;border-radius:9px;padding:12px;font-size:13px;margin-bottom:10px}.pending-action p{margin-bottom:9px}.pending-action>button{font-size:11px;padding:5px 9px;margin-top:8px}.pending-choices{display:flex;gap:8px;flex-wrap:wrap}.pending-choice{display:inline-flex;gap:8px;align-items:center;padding:8px 12px;font-size:12px}.pending-choice .formula{min-height:40px;width:auto}.pending-choice .avatar{width:26px;min-width:26px;height:31px}.pending-choice .avatar::before,.pending-choice .avatar::after{display:none}.pending-choice .avatar b{top:0;font-size:15px}.pending-choice .formula-op{font-size:19px}.skill-tooltip{position:fixed;z-index:50;pointer-events:none;background:#253f34;color:#f4f7ed;border-radius:9px;padding:12px 15px;max-width:330px;font-size:12px;line-height:1.8;box-shadow:0 5px 22px #21342626;overflow-wrap:anywhere}.skill-tooltip strong{display:block;font-size:13px;margin-bottom:4px}.feedback{margin:20px 0 0;padding:15px 18px;border-radius:10px;background:#e9eee1;border:1px solid #cbd8bf;font-size:14px;line-height:1.8}.feedback[data-error=true]{background:#f8eee1;border-color:#c9a878;color:#78522f}.victory{display:flex;justify-content:space-between;gap:20px;align-items:center;background:#deedd7;border:1px solid #94b77d;border-radius:14px;margin-top:16px;padding:24px}.victory p:not(.eyebrow){font-size:14px;margin-top:10px}.victory button{background:var(--green);color:white;border-color:var(--green);white-space:nowrap}.proof-history,.how-to{border-top:1px solid var(--line);padding:18px 0;margin-top:20px}.proof-history>summary,.how-to>summary{font-size:15px;font-weight:600;cursor:pointer}.proof-history>summary span{font-size:12px;font-weight:400;color:var(--muted);margin-left:10px}.proof-history ol{padding-left:26px;font-size:14px}.proof-history li{padding:8px 0;line-height:1.8}.proof-history li small{display:block;color:var(--muted);font-size:12px}.how-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:22px}.how-grid h3{font-size:14px;margin-bottom:8px}.how-grid p{font-size:13px;color:var(--muted);line-height:1.9}.copyright-notice{margin-top:35px;padding-top:24px;border-top:1px solid var(--line)}.copyright-notice h2{font-size:18px;margin-bottom:14px}.copyright-notice p{font-size:12px;color:var(--muted);margin-bottom:10px;max-width:900px;line-height:1.85}.copyright-notice .copyright-summary{margin-top:20px;padding-top:15px;border-top:1px solid var(--line);max-width:none}.won-card .card-main{background:#edf5e6;border-color:#7eab66}.won-seal{font-size:13px;color:var(--green);font-weight:700;text-align:center}.new-card .card-main{animation:card-arrive .3s ease-out}.updated-card .card-main{animation:card-update .35s ease-out}@keyframes card-arrive{from{transform:translateY(10px) rotate(-2deg)}to{transform:translateY(0) rotate(0)}}@keyframes card-update{0%{transform:scale(.96)}55%{transform:scale(1.035)}100%{transform:scale(1)}}
@media(min-width:1450px){main{padding-inline:42px}.card-zones{grid-template-columns:minmax(0,1fr) 252px}.hand{grid-template-columns:repeat(auto-fit,minmax(175px,1fr))}}
@media(max-width:1150px){main{padding-inline:24px}.game-grid{grid-template-columns:minmax(0,1fr) 245px;gap:16px}.card-zones{grid-template-columns:minmax(0,1fr) 210px;gap:20px}.hand{grid-template-columns:repeat(auto-fit,minmax(145px,1fr))}.arena{padding:17px}.skill-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.worlds{grid-template-columns:1fr}}
@media(max-width:930px){.game-grid{grid-template-columns:1fr;grid-template-areas:"arena" "skills" "world"}.card-zones{grid-template-columns:minmax(0,1fr) 240px}.hand{grid-template-columns:repeat(auto-fit,minmax(165px,1fr))}.world-panel{margin-top:8px}.worlds{grid-template-columns:repeat(4,minmax(0,1fr))}.original-task{display:none}.skill-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.how-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.world-panel details{max-width:600px}}
@media(max-width:620px){main{padding:0 14px 32px}.library-nav{font-size:11px;gap:9px;min-height:48px}.page-header{display:block;padding:22px 0 16px}h1{font-size:34px}.prototype-badge{font-size:10px;margin-left:10px}.intro-copy{font-size:14px}.chapter-picker{margin-top:20px;max-width:none;min-width:0;grid-template-columns:auto minmax(0,1fr);align-items:center;gap:6px 12px}.chapter-picker label{font-size:11px}.chapter-picker select{font-size:13px}.progress-copy{grid-column:2;font-size:11px}.mission{align-items:flex-start;gap:12px;flex-wrap:wrap;padding-top:15px}.mission h2{font-size:19px}.mission-actions button{font-size:12px;padding:7px 10px}.meaning-strip{gap:9px;margin-bottom:15px}.meaning{font-size:11px;width:100%}.arena{padding:14px;border-radius:12px}.card-zones{grid-template-columns:1fr;gap:20px}.hand{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.card-main{min-height:155px;padding:11px 9px 12px}.card-main[aria-pressed=true]{padding:10px 8px 11px}.goal-zone .card-main{min-height:150px}.goal-zone{border-top:1px solid #c3d0be;padding-top:16px}.goal-zone .formula{min-height:50px}.card-description{font-size:10px}.card-source{font-size:10px}.avatar{width:30px;min-width:30px;height:38px}.avatar::before{left:8px;top:8px;box-shadow:9px 0 0 currentColor}.avatar::after{left:12px;top:13px}.avatar b{font-size:16px;top:8px}.formula-op{font-size:21px}.formula-part{gap:3px}.formula-group{padding:4px 2px}.skill-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.skill-button{min-height:72px;padding:11px}.skill-button strong{font-size:12px}.skill-button small{font-size:11px}.skill-group .skill-button small{font-size:11px}.skill-group summary span{display:block;margin:4px 0 0 18px}.selection-row{display:block}.selection-row label{margin-top:8px}.selection-row select{max-width:calc(100% - 70px);font-size:12px;padding:7px}.effect-preview{grid-template-columns:1fr;gap:5px;min-height:64px;margin-top:15px}.worlds{grid-template-columns:repeat(2,minmax(0,1fr))}.world-value{font-size:12px}.world{padding:11px 8px}.victory{display:block;padding:20px}.victory button{margin-top:18px}.how-grid{grid-template-columns:1fr}.world-count{font-size:24px}.feedback{font-size:13px}.skill-reason{font-size:12px}.skill-tooltip{max-width:calc(100vw - 24px)}.scope-badge{max-width:62%}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.card-main:hover{transform:none}}
@media print{.skill-dock,.mission-actions,.skill-tooltip,.action-arrows,.effect-preview,.chapter-picker,.branch-tabs{display:none}main{padding:0}.game-grid{display:block}.world-panel{margin-top:25px}.worlds{grid-template-columns:repeat(4,1fr)}.card-main{box-shadow:none}.copyright-notice p{font-size:10px}}
.game-grid{position:relative;grid-template-columns:minmax(0,1fr) 370px;grid-template-areas:"skills arena" "skills world";gap:20px 28px}.skill-dock{padding:22px;background:#fffdf7;border:1px solid #d3dcca;border-radius:16px;box-shadow:0 4px 18px #233c2d04}.skill-heading h2{font-size:26px}.skill-heading .eyebrow{font-size:12px}.skill-heading{margin-bottom:18px}.skill-reason{min-height:58px}.ready-heading{display:flex;align-items:center;justify-content:space-between;margin:19px 0 12px;gap:12px}.ready-heading h3{font-size:16px}.ready-heading h3 span{font-size:12px;font-weight:400;margin-left:7px;color:var(--green)}.ready-heading>span{font-size:11px;color:var(--muted)}.skill-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.available-skills .skill-button{min-height:105px;padding:13px;background:#eef5e7;border-color:#90b47c;box-shadow:0 3px 0 #d0dfc3}.available-skills .skill-button strong{font-size:14px}.available-skills .skill-button small{font-size:11px;color:#596f50}.available-skills .skill-button:hover{background:#e0edcf;border-color:#3f7239}.skill-category{font-size:10px;line-height:1.4;color:#648253;letter-spacing:.04em}.unavailable-grid .skill-category{color:#8d9785}.unavailable-grid .skill-button{min-height:83px}.unavailable-caption{font-size:12px;color:#838c7c;margin-bottom:12px}.skill-group{margin-top:23px;padding-top:17px}.skill-group summary{font-size:14px}.skill-group summary span{display:inline;font-size:12px;margin-left:7px}.empty-skills{font-size:13px;line-height:1.9;color:var(--muted);padding:15px 0}.effect-preview{background:#f1f3e9;border:1px dashed #cbd8bd;border-radius:9px;padding:12px;margin-top:0;min-height:70px}.effect-preview .formula{min-height:42px}.arena{padding:16px;align-self:start;min-width:0}.arena-heading{margin-bottom:8px}.card-zones{grid-template-columns:1fr;gap:16px}.hand{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.card-main{min-height:119px;padding:10px;gap:9px}.card-main[aria-pressed=true]{padding:9px}.card-description{display:none}.card-id{font-size:11px}.card-kind{font-size:10px}.card-main .formula{min-height:52px}.card-main .avatar{width:29px;min-width:29px;height:36px}.card-main .avatar::before{left:7px;top:8px;box-shadow:9px 0 0 currentColor}.card-main .avatar::after{left:11px;top:13px}.card-main .avatar b{font-size:16px;top:8px}.card-main .formula-op{font-size:21px}.card-main .formula-group{padding:4px 2px}.card-main .formula-part{gap:3px}.goal-zone{border-top:1px solid #c2d1bc;padding-top:12px}.goal-zone .card-main{min-height:104px}.goal-zone .zone-heading{margin-bottom:8px}.scope-path{margin-bottom:12px;font-size:11px}.card-source{font-size:10px;margin-top:5px}.world-panel{padding:12px 0 0}.world-heading h2{font-size:17px}.world-count{font-size:21px}.worlds{grid-template-columns:repeat(4,minmax(0,1fr));gap:5px}.world{padding:6px 4px;gap:2px 6px;flex-direction:column}.world-value{font-size:10px}.world-scope{font-size:11px;margin:10px 0 8px}.world-caption{font-size:11px}.world-panel details{font-size:11px}.world-panel summary{font-size:11px}.original-task{display:none}.zone-heading h3{font-size:12px}.zone-heading span{font-size:10px}.skill-tooltip{z-index:60}.action-arrows{z-index:20}.page-header{padding:24px 0 20px}.page-header h1{font-size:36px}.intro-copy{font-size:14px}.mission{padding-top:15px}.meaning-strip{margin-bottom:17px}
@media(max-width:1150px){.game-grid{grid-template-columns:minmax(0,1fr) 330px;gap:18px}.skill-dock{padding:18px}.skill-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hand{grid-template-columns:repeat(2,minmax(0,1fr))}.card-zones{grid-template-columns:1fr}.available-skills .skill-button{min-height:100px}.worlds{grid-template-columns:repeat(4,minmax(0,1fr))}}
@media(max-width:850px){.game-grid{grid-template-columns:minmax(0,1fr) 275px;gap:12px}.skill-dock{padding:15px}.skill-grid{gap:8px}.arena{padding:12px}.hand{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.card-main{padding:8px}.card-main[aria-pressed=true]{padding:7px}.card-main .avatar{width:25px;min-width:25px;height:32px}.card-main .avatar b{font-size:14px;top:7px}.card-main .formula-op{font-size:18px}.card-main .avatar::after{left:9px}.card-main .avatar::before{left:6px;box-shadow:8px 0 0 currentColor}.card-kind{font-size:9px}.effect-preview{display:block}.preview-label{display:block;margin-bottom:5px}.selection-row{display:block}.selection-row label{margin-top:8px}.selection-row select{max-width:200px}.available-skills .skill-button strong{font-size:12px}.available-skills .skill-button small{font-size:10px}.skill-button{padding:10px}.skill-category{font-size:9px}.worlds{grid-template-columns:repeat(4,minmax(0,1fr))}.world-value{font-size:10px}}
@media(max-width:650px){.game-grid{grid-template-columns:1fr;grid-template-areas:"arena" "skills" "world";gap:14px}.skill-dock{padding:16px}.skill-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.available-skills .skill-button{min-height:102px;padding:12px}.available-skills .skill-button strong{font-size:14px}.available-skills .skill-button small{font-size:11px}.skill-category{font-size:10px}.arena{padding:12px}.card-zones{grid-template-columns:minmax(0,1fr) 128px;gap:12px}.hand{grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.goal-zone{border:0;border-left:1px solid #c2d1bc;padding:0 0 0 12px}.goal-zone .card-main{min-height:110px}.card-main{min-height:106px;padding:7px}.card-main[aria-pressed=true]{padding:6px}.card-main .formula{min-height:42px}.card-main .avatar{width:23px;min-width:23px;height:29px}.card-main .avatar::before,.card-main .avatar::after{display:none}.card-main .avatar b{top:0;font-size:15px}.card-main .formula-op{font-size:18px}.card-main .formula-part{gap:2px}.card-main .formula-group{padding:3px 1px}.card-top{gap:3px;flex-wrap:wrap}.card-kind{font-size:9px}.card-id{font-size:10px}.card-source{font-size:10px}.scope-path{font-size:10px;margin-bottom:8px}.arena-heading{font-size:12px}.scope-badge{font-size:10px}.zone-heading{margin-bottom:7px;flex-wrap:wrap;gap:3px}.zone-heading h3{font-size:11px}.zone-heading span{font-size:9px}.selection-row select{max-width:calc(100% - 65px);font-size:12px}.effect-preview{min-height:62px}.skill-heading h2{font-size:24px}.worlds{grid-template-columns:repeat(4,minmax(0,1fr))}.world{flex-direction:column;padding:8px}.world-value{font-size:11px}.world-panel{border-top:1px solid #b8c7ac}.page-header h1{font-size:32px}.mission{gap:10px}.mission h2{font-size:19px}.mission p:not(.eyebrow){font-size:12px}.meaning-strip{gap:6px 12px}.meaning{width:auto;font-size:10px}.meaning .avatar{width:22px;min-width:22px;height:26px}.meaning .avatar b{font-size:13px}.page-header{padding:18px 0}.chapter-picker{margin-top:16px}.unavailable-grid .skill-button{min-height:88px}.skill-group summary span{display:inline;margin-left:7px}.library-nav{font-size:10px}}
@media(max-width:380px){.card-zones{grid-template-columns:minmax(0,1fr) 112px;gap:9px}.goal-zone{padding-left:9px}.hand{grid-template-columns:1fr}.card-main{min-height:78px}.card-top{flex-wrap:nowrap}.card-main .formula{min-height:35px}.card-source{display:none}.goal-zone .card-main{min-height:100px}}
.interaction-guide{display:flex;align-items:center;flex-wrap:wrap;gap:8px 13px;font-size:12px;margin:0 0 15px;padding:10px 13px;background:#edf0e4;border:1px solid #d8dfce;border-radius:8px}.interaction-guide strong{font-weight:600;color:#496044}.interaction-guide>span{font-size:11px;color:#75816b}.game-grid{grid-template-columns:minmax(0,1fr) 400px}.arena{border-color:#b7c9af;box-shadow:inset 0 0 0 5px #eaf0e7,0 3px 12px #253e2908}.arena-heading{font-size:15px}.board-selection{font-size:12px;line-height:1.7;font-weight:600;color:#315c39;background:#f7fbef;border:1px solid #c2d4b7;border-radius:6px;padding:7px 10px;margin:10px 0 12px;overflow-wrap:anywhere}.card-main{min-height:142px}.goal-zone .card-main{min-height:119px}.card-main[aria-pressed=true] .card-kind{color:#1f663f;font-weight:700}.card-main[aria-pressed=true]{box-shadow:0 3px 0 #91ad8b,0 0 0 4px #bdd5b3}.scope-path{margin-bottom:12px}.card-main .avatar{width:33px;min-width:33px;height:40px}.card-main .avatar::before{left:9px;top:9px}.card-main .avatar::after{left:13px;top:14px}.card-main .formula{min-height:60px}
@media(max-width:1150px){.game-grid{grid-template-columns:minmax(0,1fr) 350px}.card-main{min-height:133px}.card-main .avatar{width:29px;min-width:29px;height:36px}.card-main .avatar::before{left:7px;top:8px}.card-main .avatar::after{left:11px;top:13px}}
@media(max-width:850px){.game-grid{grid-template-columns:minmax(0,1fr) 290px}.card-main{min-height:123px}.card-main .avatar{width:26px;min-width:26px;height:33px}.card-main .avatar::before{left:6px}.card-main .avatar::after{left:9px}.board-selection{font-size:11px}}
@media(max-width:650px){.game-grid{grid-template-columns:1fr}.interaction-guide{font-size:11px;gap:5px 8px;padding:9px}.interaction-guide>span:last-child{display:none}.arena-heading{font-size:13px}.board-selection{font-size:11px;margin:8px 0;padding:6px 8px}.card-main{min-height:119px}.goal-zone .card-main{min-height:119px}.card-main .avatar{width:27px;min-width:27px;height:33px}.card-main .avatar b{font-size:16px;top:0}.card-main .formula{min-height:48px}.card-main .formula-op{font-size:20px}.card-kind{font-size:10px}.scope-path{margin-bottom:8px}.card-zones{grid-template-columns:minmax(0,1fr) 135px}.page-header{padding:15px 0 13px}.intro-copy{margin-top:5px;font-size:12px}.chapter-picker{margin-top:12px}.mission{padding:12px 0}.meaning-strip{margin-bottom:12px}}
@media(max-width:380px){.card-zones{grid-template-columns:minmax(0,1fr) 113px}.card-main{min-height:86px}.goal-zone .card-main{min-height:110px}.card-main .formula{min-height:35px}}
.game-grid{grid-template-columns:minmax(340px,.9fr) minmax(0,1.1fr);grid-template-areas:"cards skills";gap:24px;align-items:start}.board-column{grid-area:cards;display:grid;gap:20px;min-width:0;align-self:start}.arena{grid-area:auto;padding:20px;border:1px solid #aebfa4;box-shadow:inset 0 0 0 5px #eaf0e7,0 3px 12px #253e2910}.world-panel{grid-area:auto}.arena-heading{font-size:16px}.board-selection{font-size:13px;padding:9px 11px}.card-main{min-height:156px}.goal-zone .card-main{min-height:126px}.card-main .avatar{width:35px;min-width:35px;height:43px}.card-main .avatar::before{left:10px;top:9px}.card-main .avatar::after{left:14px;top:15px}.card-main .avatar b{font-size:17px;top:9px}.card-main .formula-op{font-size:24px}.card-kind{font-size:11px}.card-id{font-size:12px}.zone-heading h3{font-size:14px}.zone-heading span{font-size:11px}.skill-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.available-skills .skill-button{min-height:99px}.effect-preview{min-height:112px;grid-template-columns:1fr;align-content:center;gap:7px;position:relative;z-index:21;background:#f1f3e9}.preview-result .formula{min-height:48px}.skill-reason{min-height:78px;position:relative;z-index:21;background:#eef1e8}.skill-dock{padding:20px}.worlds{grid-template-columns:repeat(4,minmax(0,1fr))}.world{flex-direction:row;flex-wrap:wrap;gap:3px 7px}.world-value{font-size:11px}.world-panel .original-task{display:none}
@media(min-width:1200px){.skill-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.available-skills .skill-button strong{font-size:13px}.board-column{position:sticky;top:16px}}
@media(max-width:1000px){.game-grid{grid-template-columns:minmax(285px,.87fr) minmax(0,1.13fr);gap:16px}.arena{padding:15px}.skill-dock{padding:16px}.card-main{min-height:135px}.card-main .avatar{width:29px;min-width:29px;height:36px}.card-main .avatar b{font-size:16px;top:8px}.card-main .avatar::before{left:7px;top:8px}.card-main .avatar::after{left:11px;top:13px}.card-main .formula-op{font-size:21px}.board-selection{font-size:12px}.world-value{font-size:10px}.selection-row{display:block}.selection-row label{margin-top:9px}}
@media(max-width:700px){.game-grid{grid-template-columns:1fr;grid-template-areas:"arena" "skills" "world";gap:15px}.board-column{display:contents;position:static}.arena{grid-area:arena;padding:14px}.world-panel{grid-area:world}.skill-dock{grid-area:skills;padding:16px}.card-zones{grid-template-columns:minmax(0,1fr) 138px;gap:13px}.hand{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.goal-zone{border-top:0;border-left:1px solid #bcccb5;padding:0 0 0 12px}.card-main{min-height:124px;padding:8px}.card-main[aria-pressed=true]{padding:7px}.goal-zone .card-main{min-height:124px}.card-main .avatar{width:28px;min-width:28px;height:34px}.card-main .avatar::before,.card-main .avatar::after{display:none}.card-main .avatar b{top:0;font-size:16px}.card-main .formula-op{font-size:21px}.card-top{gap:3px;flex-wrap:wrap}.card-kind{font-size:10px}.card-id{font-size:11px}.zone-heading h3{font-size:12px}.zone-heading span{font-size:10px}.arena-heading{font-size:14px}.board-selection{font-size:12px;padding:7px 9px}.worlds{grid-template-columns:repeat(4,minmax(0,1fr))}.world{flex-direction:column}.world-value{font-size:11px}.skill-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.effect-preview{min-height:112px}.skill-reason{min-height:78px}}
@media(max-width:380px){.card-zones{grid-template-columns:minmax(0,1fr) 113px;gap:9px}.hand{grid-template-columns:1fr}.card-main{min-height:80px}.goal-zone .card-main{min-height:118px}.card-main .formula{min-height:35px}.card-kind{font-size:9px}.card-source{display:none}}
.formula-group,.card-main .formula-group{display:inline-flex;flex-wrap:nowrap;align-items:stretch;gap:3px;border:0;background:#f3f1e6;border-radius:5px;padding:4px 2px}.formula-bracket{display:flex;align-items:center;justify-content:center;flex:0 0 auto;min-width:8px;font:34px/1 "Cambria Math","STIX Two Math",serif;color:#2c493c}.formula-group-content{display:inline-flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:4px;min-width:0}.card-notation{display:block;align-self:stretch;text-align:center;font:16px/1.5 "Cambria Math","STIX Two Math",serif;color:#334c3e;overflow-wrap:anywhere}.card-main{gap:9px}.formula-not{gap:3px}.formula-part[data-picked=true]{background:#e1edcd}.effect-preview .formula-bracket{font-size:32px}.card-main .formula-bracket{font-size:34px}
@media(max-width:1000px){.card-main .formula-bracket{font-size:30px}.card-notation{font-size:15px}}
@media(max-width:700px){.card-main .formula-bracket{font-size:29px}.card-main .formula-group{gap:2px}.card-main .formula-group-content{gap:2px}.card-notation{font-size:14px}.card-main{gap:8px}}
.library-nav{min-height:44px}.page-header{padding:14px 0;align-items:center}.page-header>.eyebrow,.page-header>div>.eyebrow,.page-header .intro-copy{display:none}.page-header h1{font-size:30px;line-height:1.25}.chapter-picker{grid-template-columns:auto minmax(0,1fr);min-width:310px;max-width:390px;gap:4px 9px;align-items:center}.chapter-picker .progress-copy{grid-column:2;font-size:10px}.chapter-picker select{font-size:12px;padding:7px 25px 7px 10px}.chapter-picker label{font-size:11px}.mission{padding:12px 0 10px}.mission h2{font-size:20px;margin-bottom:3px}.mission .eyebrow{font-size:10px;margin-bottom:3px}.mission p:not(.eyebrow){font-size:12px}.meaning-strip{margin-bottom:12px;gap:9px 20px}.meaning{font-size:12px}.meaning .avatar{width:25px;min-width:25px;height:29px}.interaction-guide{margin-bottom:14px;padding:8px 11px}.skill-heading{margin-bottom:12px}.skill-heading h2{font-size:23px}.skill-heading .eyebrow{font-size:11px;margin-bottom:4px}.selection-row{margin-bottom:10px}.skill-reason{min-height:62px;padding:10px 12px}.effect-preview{min-height:106px;padding:10px 12px}.ready-heading{margin-top:15px}.card-main .formula:has(.formula-group) .avatar{width:26px;min-width:26px;height:33px}.card-main .formula:has(.formula-group) .avatar b{font-size:14px;top:7px}.card-main .formula:has(.formula-group) .avatar::before{left:6px;top:7px;box-shadow:8px 0 0 currentColor}.card-main .formula:has(.formula-group) .avatar::after{left:10px;top:12px;width:6px}.card-main .formula:has(.formula-group) .formula-op{font-size:20px}.card-main .formula:has(.formula-group) .formula-bracket{font-size:30px;min-width:7px}.card-main .formula:has(.formula-group) .formula-part{gap:2px}.card-main .formula:has(.formula-group) .formula-group-content{gap:2px}
@media(min-width:560px) and (max-width:700px){.game-grid{grid-template-columns:minmax(0,.88fr) minmax(0,1.12fr);grid-template-areas:"cards skills";gap:12px}.board-column{display:grid;grid-area:cards;gap:16px}.arena{grid-area:auto;padding:11px}.world-panel{grid-area:auto}.skill-dock{padding:12px}.card-zones{grid-template-columns:1fr;gap:14px}.goal-zone{border-left:0;border-top:1px solid #bcccb5;padding:12px 0 0}.hand{grid-template-columns:repeat(2,minmax(0,1fr))}.card-main{min-height:126px}.goal-zone .card-main{min-height:108px}.card-kind{font-size:9px}.board-selection{font-size:11px}.arena-heading{font-size:13px}.scope-badge{font-size:9px;padding:3px 6px}.skill-grid{gap:7px}.available-skills .skill-button{padding:10px;min-height:104px}.available-skills .skill-button strong{font-size:12px}.available-skills .skill-button small{font-size:10px}.skill-category{font-size:9px}.skill-heading h2{font-size:21px}.skill-heading .eyebrow{font-size:10px}.skill-heading button{font-size:10px;padding:7px}.selection-row p{font-size:11px}.selection-row select{max-width:150px;font-size:11px}.skill-reason{font-size:11px;min-height:89px}.worlds{grid-template-columns:repeat(4,minmax(0,1fr))}.world-value{font-size:10px}.world-heading h2{font-size:15px}.world-heading .eyebrow{font-size:9px}.world-count{font-size:18px}.effect-preview{font-size:11px}.card-main .formula:has(.formula-group) .avatar{width:22px;min-width:22px;height:28px}.card-main .formula:has(.formula-group) .avatar b{top:0;font-size:14px}.card-main .formula:has(.formula-group) .formula-op{font-size:17px}.card-main .formula:has(.formula-group) .formula-bracket{font-size:27px}}
@media(max-width:700px){.page-header{display:flex;gap:15px}.page-header h1{font-size:27px}.prototype-badge{font-size:9px;padding:2px 5px;margin-left:6px}.chapter-picker{min-width:0;max-width:230px;grid-template-columns:1fr;gap:4px;margin:0}.chapter-picker label{display:none}.chapter-picker .progress-copy{grid-column:1;font-size:9px}.chapter-picker select{font-size:11px;padding:7px 22px 7px 8px}.mission h2{font-size:18px}.meaning{font-size:10px}.meaning .avatar{width:22px;min-width:22px;height:26px}.card-main .formula:has(.formula-group) .avatar b{top:0}.card-main .formula:has(.formula-group) .avatar::before,.card-main .formula:has(.formula-group) .avatar::after{display:none}}
@media(max-width:450px){.page-header{display:block}.chapter-picker{margin-top:10px;max-width:none;grid-template-columns:1fr auto;align-items:center}.chapter-picker .progress-copy{grid-column:2;font-size:9px;max-width:95px}.mission-actions button{font-size:11px;padding:6px 8px}.mission{gap:8px}.card-zones{grid-template-columns:minmax(0,1fr) 120px;gap:10px}.goal-zone{padding-left:10px}.card-main{min-height:121px}.card-notation{font-size:13px}}
.celebration{position:fixed;inset:0;z-index:80;pointer-events:none;overflow:hidden}.confetti-field{position:absolute;inset:0;overflow:hidden}.confetti-piece{position:absolute;top:-24px;opacity:0;animation:confetti-fall var(--duration) var(--delay) cubic-bezier(.18,.55,.5,1) both;will-change:transform,opacity}.qed-mark{position:absolute;left:0;right:0;top:43%;text-align:center;font:900 clamp(100px,17vw,200px)/1 "Georgia","Times New Roman",serif;letter-spacing:.1em;padding-left:.1em;background:linear-gradient(125deg,#f2cb66 10%,#5a9963 48%,#285c4b 83%);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 3px 0 #fffdf5) drop-shadow(0 10px 24px #163d3338);animation:qed-rise 3.3s cubic-bezier(.18,.7,.3,1) both;will-change:transform,opacity}@keyframes confetti-fall{0%{transform:translate3d(0,-4vh,0) rotate(0);opacity:0}12%{opacity:1}78%{opacity:1}100%{transform:translate3d(var(--drift),110vh,0) rotate(var(--turn));opacity:0}}@keyframes qed-rise{0%{transform:translateY(65px) scale(.8);opacity:0}18%{transform:translateY(8px) scale(1.04);opacity:1}38%{transform:translateY(-15px) scale(1);opacity:1}65%{opacity:.95}100%{transform:translateY(-170px) scale(1.06);opacity:0}}@media(prefers-reduced-motion:reduce){.confetti-field{display:none}.qed-mark{animation:none!important;transform:none;opacity:1;top:42%}}@media print{.celebration{display:none}}
#unavailable-reason{position:sticky;top:8px;z-index:25;background:#f0f1ea;border:1px solid #d9dfd0;border-radius:6px;padding:10px 12px;min-height:58px;line-height:1.7;color:#64715c}
.empty-hand{grid-column:1/-1}.skill-effects{position:fixed;inset:0;z-index:70;pointer-events:none;overflow:hidden}.flying-card{position:absolute;width:112px;min-height:90px;display:flex;align-items:center;justify-content:center;background:#fffdf2;border:2px solid #5d8f53;border-radius:12px;box-shadow:0 7px 24px #2a55352e;pointer-events:none;padding:8px}.flying-card .formula{min-height:65px}.flying-card .avatar{width:27px;min-width:27px;height:35px}.flying-card .avatar b{font-size:15px}.flying-card .formula-op{font-size:19px}.flying-card .formula-bracket{font-size:26px}.flying-card .avatar::before{left:7px;top:7px;box-shadow:8px 0 0 currentColor}.flying-card .avatar::after{left:10px;top:12px}.cast-caption{font-weight:700;color:#37622e;font-size:13px;margin-bottom:5px}.cast-description{font-size:11px;color:#5f7157;line-height:1.7}.effect-preview.cast-active{border-style:solid;border-color:#7aa867;background:#e9f2df}.mission-actions #animation-toggle[aria-pressed=true]{background:#e7efde;border-color:#a2ba90;color:#3d622f}body[data-animations=true] .confetti-piece{animation:confetti-fall var(--duration) var(--delay) cubic-bezier(.18,.55,.5,1) both!important}body[data-animations=true] .qed-mark{animation:qed-rise 3.3s cubic-bezier(.18,.7,.3,1) both!important;top:43%}body[data-animations=true] .confetti-field{display:block!important}body[data-animations=true] .new-card .card-main{animation:card-arrive .5s ease-out!important}body[data-animations=true] .updated-card .card-main{animation:card-update .5s ease-out!important}body[data-animations=true] .world[data-world-change=enter]{animation:world-enter .65s ease-out!important}body[data-animations=true] .world[data-world-change=leave]{animation:world-leave .65s ease-out!important}body[data-animations=false] .qed-mark{animation:none!important;transform:none;opacity:1;top:42%}body[data-animations=false] .confetti-field{display:none!important}body[data-animations=false] .card-main,body[data-animations=false] .world{animation:none!important;transition:none!important}@keyframes world-enter{0%{transform:scale(.75);opacity:.3}55%{transform:scale(1.08);opacity:1}100%{transform:scale(1);opacity:1}}@keyframes world-leave{0%{transform:scale(1);opacity:1}50%{transform:scale(.85);opacity:.3}100%{transform:scale(1);opacity:.56}}
.skill-dock .victory{display:block;padding:20px;margin:15px 0 0}.skill-dock .victory h2{font-size:22px}.skill-dock .victory p:not(.eyebrow){font-size:12px;line-height:1.8}.victory-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}.victory-actions button{font-size:12px;padding:9px 11px;margin:0}.victory-actions #replay-celebration{background:#f8fbf0;color:#3e6534;border-color:#9eb88c}