:root{color-scheme:light dark;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;--font-scale:1;--bg:#eef1f6;--surface:#fff;--surface-2:#f4f6fb;--surface-3:#e9edf6;--text:#131b2e;--muted:#5b6579;--line:#d6dceb;--navy:#00205B;--accent:#0039A6;--accent-soft:#e6ecfa;--badge-bg:#d9e4fa;--badge-text:#00205B;--shadow:0 4px 20px #00205b1f;--top-muted:#5b6579;--topbar-bg:#fff;--topbar-text:#00205B;--topbar-border:#0039A6;--topbar-btn-bg:#0039A612;--topbar-btn-border:#0039A640;--mark-bg:#ffffff;--mark-fg:#0039A6}
@media(prefers-color-scheme:dark){:root{--bg:#0a1120;--surface:#111a2e;--surface-2:#16213a;--surface-3:#1c2a47;--text:#eef2fb;--muted:#93a1c2;--line:#2a3a5c;--navy:#050c1e;--accent:#5b8def;--accent-soft:#16264d;--badge-bg:#1c3468;--badge-text:#bcd0fb;--shadow:0 4px 20px #0009;--topbar-bg:#050c1e;--topbar-text:#fff;--topbar-border:transparent;--topbar-btn-bg:#ffffff12;--topbar-btn-border:#ffffff35;--mark-bg:#0039A6;--mark-fg:#ffffff}}
:root[data-theme="light"]{--bg:#eef1f6;--surface:#fff;--surface-2:#f4f6fb;--surface-3:#e9edf6;--text:#131b2e;--muted:#5b6579;--line:#d6dceb;--navy:#00205B;--accent:#0039A6;--accent-soft:#e6ecfa;--badge-bg:#d9e4fa;--badge-text:#00205B;--shadow:0 4px 20px #00205b1f;--top-muted:#5b6579;--topbar-bg:#fff;--topbar-text:#00205B;--topbar-border:#0039A6;--topbar-btn-bg:#0039A612;--topbar-btn-border:#0039A640;--mark-bg:#ffffff;--mark-fg:#0039A6}
:root[data-theme="dark"]{--bg:#0a1120;--surface:#111a2e;--surface-2:#16213a;--surface-3:#1c2a47;--text:#eef2fb;--muted:#93a1c2;--line:#2a3a5c;--navy:#050c1e;--accent:#5b8def;--accent-soft:#16264d;--badge-bg:#1c3468;--badge-text:#bcd0fb;--shadow:0 4px 20px #0009;--topbar-bg:#050c1e;--topbar-text:#fff;--topbar-border:transparent;--topbar-btn-bg:#ffffff12;--topbar-btn-border:#ffffff35;--mark-bg:#0039A6;--mark-fg:#ffffff}
*{box-sizing:border-box}html{background:var(--bg);scroll-behavior:smooth}body{margin:0;min-height:100dvh;background:var(--bg);color:var(--text);padding-bottom:env(safe-area-inset-bottom)}button,input{font:inherit}.topbar{height:calc(62px + env(safe-area-inset-top));padding-top:env(safe-area-inset-top);position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:10px;padding-left:max(12px,env(safe-area-inset-left));padding-right:max(12px,env(safe-area-inset-right));background:var(--topbar-bg);color:var(--topbar-text);border-bottom:2px solid var(--topbar-border);box-shadow:0 2px 10px #0002}.brand{min-width:0;flex:1}.brand strong{display:block;font-size:1rem}.brand small{display:block;color:var(--top-muted);font-size:.74rem;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.iconBtn{width:44px;height:44px;min-width:44px;padding:0;border:1px solid var(--line);border-radius:12px;background:var(--surface-2);color:var(--text);font-size:1.3rem}.topbar .iconBtn,.searchPanel .iconBtn{background:var(--topbar-btn-bg);border-color:var(--topbar-btn-border);color:var(--topbar-text)}.searchPanel{position:fixed;z-index:30;top:0;left:0;right:0;padding-top:calc(10px + env(safe-area-inset-top));background:var(--topbar-bg);border-bottom:2px solid var(--topbar-border);display:none;flex-direction:column;gap:8px;padding-left:max(12px,env(safe-area-inset-left));padding-right:max(12px,env(safe-area-inset-right));padding-bottom:14px}.searchPanel.open{display:flex}.searchRow{display:flex;gap:8px}.searchPanel input{flex:1;min-width:0;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--text)}.searchHint{margin:0;padding:0 2px;font-size:.78rem;line-height:1.4;color:var(--top-muted)}.appShell{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:calc(100dvh - 62px - env(safe-area-inset-top))}aside{background:var(--surface);border-right:1px solid var(--line);padding:12px;overflow:auto}aside button,.result,.ruleLink{display:block;width:100%;min-height:48px;text-align:left;border:1px solid var(--line);background:var(--surface);border-radius:10px;padding:10px 12px;margin-bottom:7px;color:var(--text)}aside button b{display:block}aside button small,.result small,.ruleLink small{display:block;color:var(--muted);margin-top:3px;line-height:1.3}.drawerTabs{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;position:sticky;top:0;background:var(--surface);padding-bottom:8px;z-index:2}.drawerTab.active{background:var(--navy);color:#fff}.sideTitle{font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:12px 4px 8px}.hint{font-size:.86rem;color:var(--muted);padding:2px 4px}.viewerToolbar{position:sticky;top:calc(62px + env(safe-area-inset-top));z-index:10;display:flex;align-items:center;gap:6px;padding:8px max(10px,env(safe-area-inset-right)) 8px max(10px,env(safe-area-inset-left));background:var(--surface-2);border-bottom:1px solid var(--line);box-shadow:0 2px 8px #0002;overflow:auto}.viewerToolbar button{min-height:42px;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:8px;padding:8px 10px}.spacer{flex:1}.segmented{display:flex}.segmented button{border-radius:0;white-space:nowrap}.segmented button:first-child{border-radius:8px 0 0 8px}.segmented button:last-child{border-radius:0 8px 8px 0}.segmented button.active{background:var(--navy);color:#fff;border-color:var(--navy)}.rulePosition{font-weight:800;white-space:nowrap}main{min-width:0}article{max-width:980px;margin:0 auto;padding:16px}.ruleHero{display:grid;grid-template-columns:1fr auto;gap:4px 12px;padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:14px;margin-bottom:12px}.ruleHero h1{margin:0;font-size:clamp(1.65rem,6vw,2.35rem)}.ruleHero p{margin:.35rem 0 0;color:var(--muted)}.ruleHero .pageRange{grid-column:1/-1}.subruleNav{display:flex;gap:8px;overflow-x:auto;padding:0 2px 12px;scrollbar-width:none}.subruleNav::-webkit-scrollbar{display:none}.subruleNav button{white-space:nowrap;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:999px;padding:8px 11px}.ruleIntro,.ruleSection{background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 2px 8px #0002;margin-bottom:12px;overflow:hidden;scroll-margin-top:124px}.ruleSection>header{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 14px;background:var(--surface-3);border-bottom:1px solid var(--line)}.ruleSection h2{margin:0;font-size:1.04rem;color:var(--accent)}.sectionHeaderActions{display:flex;align-items:center;gap:6px;flex-shrink:0}.starBtn{border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:999px;width:36px;height:36px;min-width:36px;padding:0;font-size:1.05rem;line-height:1;display:flex;align-items:center;justify-content:center}.starBtn.isSaved{border-color:#d4a017;color:#b8860b;background:color-mix(in srgb,#d4a017 18%,transparent)}.sectionLang{padding:15px 16px;font-size:calc(1rem * var(--font-scale));line-height:1.65;font-family:Arial,sans-serif}.sectionLang+.sectionLang{border-top:1px dashed var(--line)}.sectionLang p{margin:0}.translation{background:color-mix(in srgb,var(--surface-2) 70%,transparent)}.sourceGallery{display:grid;gap:16px}.sourcePage{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden}.sourcePage header{display:flex;justify-content:space-between;padding:10px 12px;font-weight:800}.sourcePage img{width:100%;display:block;background:#fff}.pageRange{font-size:.86rem;color:var(--muted)}.result.active,.ruleLink.active{border-color:var(--accent);background:var(--accent-soft)}#backdrop{display:none}.loading{padding:40px;text-align:center;color:var(--muted)}.missing{margin:15px;padding:15px;background:#fff7ed;color:#9a3412;border:1px solid #fed7aa;border-radius:10px}.bottomNav{display:none}
@media(max-width:900px){body{padding-bottom:calc(104px + env(safe-area-inset-bottom))}.appShell{display:block}aside{position:fixed;z-index:25;top:calc(62px + env(safe-area-inset-top));bottom:calc(60px + env(safe-area-inset-bottom));left:0;width:min(90vw,360px);transform:translateX(-105%);transition:.2s;box-shadow:6px 0 18px #0007;padding-left:max(12px,env(safe-area-inset-left))}aside.open{transform:none}#backdrop.open{display:block;position:fixed;z-index:24;inset:calc(62px + env(safe-area-inset-top)) 0 calc(60px + env(safe-area-inset-bottom));background:#0009}.spacer{display:none}article{padding:10px}.segmented{margin-left:auto}.bottomNav{position:fixed;z-index:22;left:0;right:0;bottom:0;height:calc(60px + env(safe-area-inset-bottom));padding:6px 6px calc(6px + env(safe-area-inset-bottom));display:grid;grid-template-columns:repeat(4,1fr);gap:6px;background:var(--surface);border-top:1px solid var(--line)}.bottomNav button{border:1px solid var(--line);border-radius:10px;background:var(--surface-2);color:var(--text);font-size:.72rem}.bottomNav button.active{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}.bottomNav span{display:block;font-size:1.2rem;margin-bottom:2px}}
@media(max-width:560px){.viewerToolbar{gap:5px}.viewerToolbar button{padding:8px 9px}.segmented button{font-size:.78rem}.brand strong{font-size:.96rem}.fontBtn{display:none}.ruleHero{padding:14px}.sectionLang{padding:14px}.ruleSection{border-radius:11px}}

.referenceCard,.notesCard{background:var(--surface);border:1px solid var(--line);border-radius:14px;margin:12px 0;padding:15px;box-shadow:0 2px 8px #0002}
.referenceCard{display:grid;gap:16px}.referenceCard h2,.notesCard h2{font-size:1rem;margin:0 0 9px}.chipRow{display:flex;flex-wrap:wrap;gap:8px}
.refChip{border:1px solid var(--line);background:var(--accent-soft);color:var(--accent);border-radius:999px;padding:8px 11px;font-weight:750}
.notesCard header{display:flex;align-items:start;justify-content:space-between;gap:12px;margin-bottom:10px}.notesCard header p{margin:3px 0 0;color:var(--muted);font-size:.82rem}.notesCard textarea{width:100%;min-height:120px;resize:vertical;border:1px solid var(--line);border-radius:10px;padding:12px;background:var(--surface-2);color:var(--text);font:inherit;line-height:1.5}.notesCard #noteState{font-size:.78rem;color:var(--accent);font-weight:800}
.equipmentCard{background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:12px;margin-bottom:10px;scroll-margin-top:12px}.equipmentCard h3{margin:0;font-size:1rem}.equipmentCard p{margin:7px 0;color:var(--muted);line-height:1.4}.equipmentCard .equipmentPl{font-size:.82rem;color:var(--accent);font-weight:700}
.pageImageBtn{display:block;width:100%;padding:0;border:0;background:#fff;cursor:zoom-in}.pageImageBtn img{width:100%;display:block}
.illustrationRow{display:grid;gap:12px;margin-bottom:12px}
.illustrationFigure{margin:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 2px 8px #0002;background:#fff}
.illustrationRow .illustrationBtn{display:flex;align-items:center;justify-content:center;width:100%;padding:10px;border:0;background:#fff;cursor:zoom-in}
.illustrationRow .illustrationBtn img{display:block;width:auto;height:auto;max-width:100%;max-height:min(55vh,420px);object-fit:contain;margin:0 auto}
.illustrationCaption{padding:6px 12px 10px;text-align:center;font-size:.76rem;font-weight:700;color:var(--muted);border-top:1px dashed var(--line);background:var(--surface-2)}
.ruleSection .illustrationRow{padding:12px 16px 0}
.imageViewer{position:fixed;z-index:100;inset:0;display:none;background:#000e;color:#fff;opacity:0;transition:opacity .22s ease}.imageViewer.open{display:flex;flex-direction:column;opacity:1}.imageClose{position:absolute;z-index:2;top:max(12px,env(safe-area-inset-top));right:max(12px,env(safe-area-inset-right));width:46px;height:46px;border:1px solid #ffffff55;border-radius:50%;background:#0009;color:#fff;font-size:1.7rem}.imageStage{flex:1;overflow:hidden;display:flex;align-items:center;justify-content:center;padding:70px 10px 18px;touch-action:none;cursor:grab}.imageStage.zoomed{cursor:grabbing}.imageStage img{display:block;max-width:100%;max-height:100%;width:auto;height:auto;background:#fff;box-shadow:0 0 30px #000;transition:transform .18s ease;transform-origin:center center;user-select:none;-webkit-user-drag:none}.imageStage img.noTransition{transition:none}.imageCaption{text-align:center;padding:10px max(12px,env(safe-area-inset-right)) calc(10px + env(safe-area-inset-bottom));background:#000}.modalOpen{overflow:hidden}
@media(max-width:420px){.drawerTab{font-size:.78rem;padding-left:5px!important;padding-right:5px!important}.bottomNav button{font-size:.66rem}.refChip{font-size:.78rem}}

.studyMenuBtn{display:block;width:100%;text-align:left;border:1px solid var(--line);background:var(--surface-2);color:var(--text);border-radius:11px;padding:12px;margin-bottom:9px}.studyMenuBtn b,.studyMenuBtn small{display:block}.studyMenuBtn small{margin-top:4px;color:var(--muted);line-height:1.35}
.studySummary{margin-top:15px;padding:12px;border-top:1px solid var(--line)}.studySummary b,.studySummary small{display:block}.studySummary small{color:var(--muted);margin-top:5px}.studyProgress{height:8px;background:var(--line);border-radius:10px;overflow:hidden;margin-top:9px}.studyProgress span{display:block;height:100%;background:var(--accent)}
.studyHero{display:flex;justify-content:space-between;align-items:flex-start;gap:15px;margin-bottom:16px}.studyHero h1{font-size:1.55rem;margin:0}.studyHero p{margin:5px 0 0;color:var(--muted)}.studyExit{border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:9px;padding:9px 11px;white-space:nowrap}
.studyCounter{text-align:center;color:var(--muted);font-size:.85rem;margin-bottom:8px}.flashcard,.quizCard{background:var(--surface);border:1px solid var(--line);border-radius:17px;padding:20px;box-shadow:0 5px 18px #0002}.flashcard{min-height:340px;display:flex;flex-direction:column}.flashRule{color:var(--accent);font-weight:850}.flashcard h2{font-size:1.45rem;margin:7px 0}.flashTitle{color:var(--muted);margin:0 0 18px}.flashPrompt{flex:1;display:grid;place-items:center;text-align:center;border:2px dashed var(--line);border-radius:12px;color:var(--muted);padding:20px}.flashAnswer{line-height:1.55}.flashAnswer>.translation{border-top:1px solid var(--line);margin-top:18px;padding-top:15px}
.studyActions,.masterActions{display:flex;justify-content:center;flex-wrap:wrap;gap:9px;margin-top:13px}.studyActions button,.masterActions button,.quizOptions button,.numberCard button{border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:10px;padding:11px 14px;font-weight:750}.primaryAction,.mastered{background:var(--accent)!important;color:#fff!important;border-color:var(--accent)!important}
.quizCard p{font-size:1.05rem;line-height:1.6}.quizOptions{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:13px}.quizOptions button{font-size:1rem}.quizResult{margin-top:13px;padding:12px;border-radius:10px;font-weight:800}.quizResult.correct{background:#16a34a22;color:#15803d}.quizResult.wrong{background:#dc262622;color:#b91c1c}
.numberTools{display:flex;align-items:center;gap:10px;margin-bottom:12px}.numberTools input{flex:1;min-width:0;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:10px;padding:12px}.numberTools span{color:var(--muted);font-size:.8rem;white-space:nowrap}.numberCard{background:var(--surface);border:1px solid var(--line);border-radius:13px;padding:14px;margin-bottom:10px}.numberCard header{display:flex;justify-content:space-between;align-items:flex-start;gap:10px}.numberCard header b,.numberCard header small{display:block}.numberCard header small{color:var(--muted);margin-top:3px}.numberCard p{line-height:1.5}.valueChips{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:5px}.valueChips span{background:var(--accent-soft);color:var(--accent);border-radius:999px;padding:5px 8px;font-size:.75rem;font-weight:850}
@media(max-width:560px){.drawerTabs{grid-template-columns:repeat(2,1fr)}.studyHero{display:block}.studyExit{margin-top:10px}.quizOptions{grid-template-columns:1fr}.flashcard{min-height:300px;padding:16px}.bottomNav button{font-size:.62rem}.bottomNav button span{font-size:1rem}}
.inlineRuleLink{display:inline-flex;vertical-align:baseline;border:1px solid var(--accent);background:var(--accent-soft);color:var(--accent);font:inherit;font-weight:750;font-size:.92em;padding:1px 8px;margin:0 1px;border-radius:7px;text-decoration:none;cursor:pointer;line-height:1.5}
.inlineRuleLink:active{background:var(--accent);color:#fff}
.inlineRuleLink:hover,.inlineRuleLink:active{text-decoration-style:solid}
#themeBtn{font-size:1.15rem}
.settingsModal{position:fixed;z-index:100;inset:0;display:none;background:#0009;align-items:center;justify-content:center;padding:16px}
.settingsModal.open{display:flex}
.settingsCard{background:var(--surface);border-radius:16px;max-width:420px;width:100%;padding:18px;box-shadow:var(--shadow);max-height:85vh;overflow:auto}
.settingsCard header{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:6px}
.settingsCard h2{margin:0;font-size:1.15rem}
.settingsCard .hint{margin:0 0 14px;color:var(--muted);font-size:.84rem;line-height:1.4}
.langModeBtn,.themeModeBtn{display:block;width:100%;text-align:left;border:1px solid var(--line);background:var(--surface-2);color:var(--text);border-radius:12px;padding:13px 14px;margin-bottom:9px}
.langModeBtn b,.themeModeBtn b{display:block;color:var(--text)}
.langModeBtn small,.themeModeBtn small{display:block;margin-top:4px;color:var(--muted);line-height:1.35}
.langModeBtn.active,.themeModeBtn.active{border-color:var(--accent);background:var(--accent-soft)}
.langModeBtn.active b,.themeModeBtn.active b{color:var(--accent)}
.mtaMark{width:38px;height:38px;min-width:38px;border-radius:50%;background:var(--mark-bg);color:var(--mark-fg);display:flex;align-items:center;justify-content:center;border:2px solid var(--line)}
.topbar .brand{padding:0 2px}
.drawerHeader{display:none}
@media(max-width:900px){
  .drawerTabs{display:none}
  .drawerHeader{display:flex;align-items:center;justify-content:space-between;gap:10px;position:sticky;top:0;background:var(--surface);padding:2px 2px 12px;margin-bottom:4px;border-bottom:1px solid var(--line);z-index:2}
  .drawerHeader span{font-size:1.15rem;font-weight:800}
}
.navArrow{display:flex;align-items:center;justify-content:center}
.navArrow svg{transform:scaleX(-1)}
.navArrowPrev svg{transform:none}
.appFooter{max-width:980px;margin:24px auto 0;padding:14px 16px calc(20px + env(safe-area-inset-bottom));border-top:1px solid var(--line);text-align:center;font-size:.78rem;color:var(--muted);line-height:1.6}
.categoryFilters{display:flex;gap:7px;overflow-x:auto;padding:2px 2px 12px;margin-bottom:6px;border-bottom:1px solid var(--line);scrollbar-width:none}
.categoryFilters::-webkit-scrollbar{display:none}
.categoryChip{display:inline-flex;width:auto;flex:0 0 auto;white-space:nowrap;border:1px solid var(--line);background:var(--surface-2);color:var(--text);border-radius:999px;padding:9px 13px;font-weight:700;font-size:.86rem;min-height:auto;margin-bottom:0}
.categoryChip.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.betaBanner{margin:8px max(12px,env(safe-area-inset-right)) 0 max(12px,env(safe-area-inset-left));padding:7px 12px;border:1px solid #f59e0b;border-width:1.5px;background:#f59e0b26;color:#b45f00;font-weight:800;font-size:.72rem;letter-spacing:.02em;border-radius:8px;text-align:center}
@media(prefers-color-scheme:dark){.betaBanner{color:#ffd166;background:#f59e0b30;border-color:#f5a623}}
:root[data-theme="dark"] .betaBanner{color:#ffd166;background:#f59e0b30;border-color:#f5a623}
:root[data-theme="light"] .betaBanner{color:#b45f00;background:#f59e0b26;border-color:#f59e0b}
.enBox{display:flex;gap:9px;margin-top:10px;padding:9px 11px;background:var(--surface-2);border-radius:8px;border-left:3px solid var(--accent)}
.enTag{flex:0 0 auto;font-size:.62rem;font-weight:800;letter-spacing:.06em;color:var(--muted);border:1px solid var(--line);border-radius:4px;padding:1px 6px;height:fit-content}
.enBody{flex:1 1 auto;min-width:0}
.enBody p{margin:0;font-style:italic;color:var(--text)}
.ruleLinkEn{font-style:italic;opacity:.75}
.actionGrid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:4px}
.actionGrid-content{grid-template-columns:repeat(2,1fr)}
.actionGrid:has(.themeModeBtn){grid-template-columns:repeat(3,1fr)}
.actionGrid:has(.langModeBtn){grid-template-columns:repeat(2,1fr)}
.actionBtn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;padding:14px 4px;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:12px;font-size:.72rem;font-weight:700;min-height:auto;margin-bottom:0;text-align:center}
.actionBtn span:first-child{font-size:1.2rem;line-height:1}
.actionBtn.active{border-color:var(--accent);background:var(--accent-soft);color:var(--accent)}
.aboutMeta{margin:6px 2px 10px;padding:10px 12px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;display:grid;grid-template-columns:auto 1fr;gap:4px 10px;font-size:.85rem}.aboutMeta dt{color:var(--muted);font-weight:600}.aboutMeta dd{margin:0;color:var(--text)}
.aboutCredit{margin:0;padding:0 2px;font-size:.78rem;line-height:1.6;color:var(--muted);text-align:center}