:root{--mikudark: #038287;--mikupink: #de0076;--kaitoblack: #100258;--brightgrey: #eff7ff;--mikulight: #8ff8e5;--meikolight: #bfe9ff;--lukalight: #ffdee6;--meikomid: #61b6e4;--lightgrey: #bfdcff;--faultred: rgba(246, 107, 107, .7);--font-body: "LINE Seed JP", "Hiragino Sans", "Yu Gothic", sans-serif;--font-title: "M PLUS 1", var(--font-body);--font-kanji: "Noto Serif JP", "Yu Mincho", "Hiragino Mincho ProN", serif;font-family:var(--font-body);color:var(--kaitoblack);background:#fff;line-height:1.5;font-weight:400;color-scheme:light;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0;min-width:320px}button{font:inherit}#root{min-height:100vh;min-height:100svh}.app-shell{min-height:100vh;min-height:100svh;padding:32px 24px;background:#fff}.card-app-shell{overflow-x:clip;overscroll-behavior-y:none}html:has(.card-app-shell),body:has(.card-app-shell){overscroll-behavior-y:none}.app-frame{max-width:880px;margin:0 auto}.app-loading{display:grid;min-height:100svh;place-items:center}.app-loading-content{display:grid;gap:14px;justify-items:center;color:#657091;font-size:13px}.app-loading-spinner{width:30px;height:30px;border:3px solid rgba(3,130,135,.18);border-top-color:var(--mikudark);border-radius:50%;animation:appLoadingSpin .75s linear infinite}@keyframes appLoadingSpin{to{transform:rotate(360deg)}}.panel{padding:0}.stack{display:grid;gap:24px}.center{text-align:center}.error-panel{max-width:560px;margin:0 auto}.error-panel .primary-button{justify-self:center}h1,h2,h3,p{margin:0}h1{color:var(--mikudark);font-family:var(--font-title);font-size:clamp(1.75rem,6vw,2.6rem);font-weight:700;line-height:1.35}.sr-only{position:absolute;overflow:hidden;width:1px;height:1px;margin:-1px;padding:0;border:0;clip:rect(0,0,0,0);white-space:nowrap}h2{color:var(--mikudark);font-size:clamp(1.35rem,4vw,2rem);line-height:1.45}button{cursor:pointer}button:disabled{cursor:default}.eyebrow,.section-label{color:var(--mikudark);font-size:.95rem;font-weight:700;letter-spacing:.02em}.lead{margin-top:12px;max-width:34rem;color:var(--kaitoblack);font-size:1rem;line-height:1.8}.home-hero{display:grid;gap:10px;justify-items:center}.subscription-quick-status{display:inline-flex;width:fit-content;max-width:100%;align-items:center;gap:8px;padding:6px 10px;border:1px solid var(--lightgrey);border-radius:999px;background:#ffffffd1}.subscription-quick-status small{overflow-wrap:anywhere;color:#100258ad;font-size:.78rem;font-weight:700;line-height:1.3}.home-subscription-status{justify-self:center}.not-found-screen{display:grid;min-height:calc(100vh - 64px);place-items:center;padding:44px 0}.not-found-card{display:grid;width:min(100%,680px);gap:18px;justify-items:center;padding:clamp(28px,7vw,56px);border:1px solid var(--lightgrey);border-radius:28px;background:var(--brightgrey);text-align:center}.not-found-logo{display:block;width:min(100%,320px);height:auto}.not-found-card h1{color:var(--kaitoblack);font-family:var(--font-title);font-size:clamp(2rem,7vw,3rem);line-height:1.25}.not-found-card p{max-width:34rem;color:#100258b8;line-height:1.8}.not-found-actions{display:flex;width:min(100%,480px);flex-wrap:wrap;gap:12px;justify-content:center}.not-found-actions .primary-button,.not-found-actions .ghost-button{flex:1 1 180px}.pricing-screen{gap:32px;padding:34px;border-radius:32px;background:var(--brightgrey)}.pricing-page-title{color:var(--kaitoblack);font-size:1.5rem;text-align:center}.pricing-hero{display:grid;gap:18px;justify-items:center;text-align:center}.pricing-hero h2{color:var(--kaitoblack);font-family:var(--font-title);font-size:clamp(2rem,7vw,3.1rem);line-height:1.25}.pricing-hero p{max-width:560px;color:#100258a8;font-size:.95rem;line-height:1.8}.early-supporter-banner{display:grid;width:min(100%,620px);gap:5px;padding:15px 20px;border:2px solid rgba(197,31,66,.28);border-radius:20px;background:linear-gradient(135deg,#fff4f5,#fff9f5);color:#c51f42;text-align:left}.early-supporter-banner strong{color:#c51f42;font-family:var(--font-title);font-size:1.05rem}.early-supporter-banner span{font-size:.88rem;font-weight:700;line-height:1.65}.checkout-success-message{display:grid;width:min(100%,620px);gap:6px;padding:18px 22px;border:2px solid rgba(3,130,135,.32);border-radius:20px;background:#e9f8f8;color:var(--mikudark);text-align:left;box-shadow:0 12px 30px #03828714}.checkout-success-message strong{color:var(--mikudark);font-family:var(--font-title);font-size:1.08rem;line-height:1.45}.checkout-success-message span{color:#100258b8;font-size:.92rem;font-weight:700;line-height:1.7}.pricing-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:24px}.pricing-card{display:grid;align-content:start;gap:28px;min-height:520px;padding:30px;border-radius:32px;background:#fff;box-shadow:0 16px 42px #1002580f}.pricing-card-head{display:grid;gap:12px}.pricing-card-head>span{color:#1002588c;font-size:1.35rem;font-weight:700}.plus-plan .pricing-card-head>span{color:var(--meikomid)}.pricing-plan-title{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.pricing-plan-title>span{color:var(--meikomid);font-size:1.35rem;font-weight:700}.pricing-price{display:flex;align-items:center;gap:9px;flex-wrap:wrap}.pricing-price del{color:#1002586b;font-size:1.05rem;font-weight:700}.pricing-price strong{color:#050812;font-size:clamp(2.8rem,8vw,3.6rem);line-height:1}.pricing-price strong.early-supporter-price{color:#c51f42}.pricing-price em{color:#050812;font-size:1.2rem;font-style:normal;font-weight:700}.pricing-price small{display:inline-flex;padding:8px 12px;border-radius:999px;background:#f1f7fb;color:#1002588a;font-weight:700}.pricing-feature-list{display:grid;gap:18px;margin:0;padding:0;list-style:none}.pricing-feature-list li{position:relative;display:grid;gap:4px;padding-left:44px;color:var(--kaitoblack);font-size:1rem;font-weight:700;line-height:1.55}.pricing-feature-list li:before{content:"✓";position:absolute;left:0;top:0;display:inline-grid;width:28px;height:28px;place-items:center;border-radius:50%;background:#e6f6ff;color:var(--meikomid);font-weight:700}.pricing-feature-list-plus li:before{content:"✦";width:36px;height:36px;border-radius:14px}.pricing-feature-list span{color:#1002588f;font-size:.86rem;font-weight:700}.subscription-status-note{color:#100258a8;font-size:.9rem;font-weight:700;line-height:1.65}.pricing-contract-note{display:grid;gap:8px;padding:14px 16px;border-radius:16px;background:#f7fbfe;color:#100258ad;font-size:.78rem;font-weight:700;line-height:1.7}.pricing-contract-note p{margin:0}.pricing-contract-links{display:flex;gap:12px;flex-wrap:wrap}.pricing-contract-links a{color:var(--meikomid);text-decoration:underline;text-underline-offset:3px}.subscription-manage-note{color:#10025894;font-size:.78rem;font-weight:700;line-height:1.65}.parent-subscription-card .subscription-manage-note{color:#10025894;font-size:.78rem}.pricing-cta{width:100%;margin-top:auto;background:var(--meikomid);box-shadow:0 0 0 7px #d8f1ff}.pricing-note-band{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:center;padding:18px 20px;border-radius:999px;background:#dfeffc}.pricing-note-band p{color:#100258b8;font-weight:700;line-height:1.6}.pricing-law-link{justify-self:end;color:#10025885}.app-logo{display:block;width:min(70%,532px);height:auto;margin:-8px 0 -6px}.summary-grid{display:grid;gap:14px;grid-template-columns:repeat(4,minmax(0,1fr))}.summary-grid.compact{margin-top:12px}.mode-summary-stack{display:grid;gap:12px}.mode-summary-panel{display:grid;grid-template-columns:minmax(9rem,1fr) minmax(0,2.4fr) auto;gap:12px;align-items:center;background:var(--brightgrey);border-radius:22px;padding:16px}.summary-progress{display:grid;gap:6px}.summary-progress-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px}.summary-progress-head span{color:var(--mikupink);font-size:1.15rem;font-weight:700}.summary-progress-track{overflow:hidden;height:8px;background:#dff1ff;border-radius:999px}.summary-progress-fill{height:100%;background:var(--mikudark);border-radius:999px}.summary-progress-count{color:#100258b8;font-size:.78rem;line-height:1.4}.filter-count{color:#100258b8;font-size:.82rem;font-weight:700}.limit-helper{color:#10025894;font-size:.8rem;font-weight:700;line-height:1.6}.limit-helper.emphasis{color:var(--mikupink)}.plan-limit-card{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:14px;align-items:center;padding:16px 18px;border:1px solid #cdeaff;border-radius:18px;background:#f2f9ff;color:var(--kaitoblack)}.plan-limit-card.compact{grid-column:1 / -1;margin-top:2px}.plan-limit-card div{display:grid;gap:5px}.plan-limit-card strong{color:var(--mikudark);font-size:.98rem;line-height:1.55}.plan-limit-card span:not(.section-label){color:#100258ad;font-size:.82rem;font-weight:700;line-height:1.55}.summary-inline-grid{display:grid;gap:8px;grid-template-columns:repeat(4,minmax(0,1fr))}.summary-inline-card{display:grid;gap:2px;min-height:60px;border:none;border-radius:12px;padding:16px 24px;color:var(--kaitoblack);text-align:left}.summary-inline-card strong{font-size:1.35rem;line-height:1}.summary-actions{display:flex;justify-content:flex-end}.summary-card{display:grid;gap:8px;position:relative;overflow:hidden;border:none;border-radius:18px;padding:18px;color:var(--kaitoblack);text-align:left}.summary-card span{display:inline-flex;gap:8px;align-items:center}.summary-card strong{font-size:2rem}.summary-card.mastery-bumped{animation:mastery-card-pop .82s cubic-bezier(.2,.86,.22,1.12)}.summary-card.mastery-bumped:after{content:"";position:absolute;top:-24%;right:-18%;bottom:-24%;left:-18%;background:linear-gradient(115deg,transparent 28%,rgba(255,255,255,.72) 47%,transparent 66%);transform:translate(-62%);animation:mastery-card-sheen .9s ease-out;pointer-events:none}.summary-card.mastery-bumped strong{animation:mastery-count-pop .72s cubic-bezier(.2,.86,.22,1.2)}.mastery-bump-label{display:inline-grid;place-items:center;min-width:2rem;padding:3px 8px;border-radius:999px;background:#fff;color:var(--mikudark);font-size:.78rem;font-style:normal;font-weight:800}.review-panel{display:grid;gap:12px;width:100%;text-align:left}.review-panel h3{color:var(--mikudark);font-size:1.1rem;line-height:1.4}.review-list{display:grid;gap:10px}.review-item{display:grid;grid-template-columns:42px 1fr;gap:12px;align-items:start;border-radius:16px;padding:14px;background:var(--brightgrey)}.review-item.correct{background:#e4fbf6}.review-item.wrong{background:#fff0d0}.review-result-mark{display:grid;place-items:center;width:42px;height:42px;font-size:1.35rem;font-weight:700;line-height:1}.review-item.correct .review-result-mark{color:var(--mikudark)}.review-item.wrong .review-result-mark{color:#d52c4b}.review-main{display:grid;gap:8px;min-width:0}.review-head{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.review-head strong{font-size:1.1rem;line-height:1.35}.review-number{color:#10025894;font-size:.85rem;font-weight:700}.review-clue,.review-status-change,.review-history{color:#100258ad;font-size:.82rem;line-height:1.55}.review-status-change{color:var(--mikupink);font-weight:700}.review-answer-row{display:flex;gap:8px 12px;flex-wrap:wrap;color:var(--kaitoblack);font-size:.9rem;font-weight:700}.result-panel{position:relative;overflow:hidden}.result-account-card{width:100%;text-align:left}.daily-stamp-celebration{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;display:grid;place-items:center;background:#1002581f;pointer-events:none;animation:dailyStampBackdrop 2.8s ease-out forwards}.daily-stamp-paper{position:relative;display:grid;width:min(86vw,380px);aspect-ratio:1;place-items:center;align-content:center;gap:10px;border:9px solid #d33131;border-radius:999px;background:#fffffff5;color:#d33131;box-shadow:0 28px 70px #10025847;opacity:0;transform:translateY(-120px) rotate(-16deg) scale(1.62);animation:dailyStampPress 2.65s cubic-bezier(.18,.86,.28,1.18) forwards}.daily-stamp-paper:before,.daily-stamp-paper:after{content:"";position:absolute;border-radius:999px;pointer-events:none}.daily-stamp-paper:before{top:16px;right:16px;bottom:16px;left:16px;border:3px dashed rgba(211,49,49,.42)}.daily-stamp-paper:after{top:-28px;right:-28px;bottom:-28px;left:-28px;border:4px solid rgba(211,49,49,.14);animation:dailyStampRing 1.5s ease-out .34s forwards}.daily-stamp-paper span,.daily-stamp-paper em{position:relative;z-index:1;font-size:clamp(.95rem,3.2vw,1.2rem);font-style:normal;font-weight:800}.daily-stamp-paper strong{position:relative;z-index:1;font-family:var(--font-title);font-size:clamp(6.2rem,28vw,9rem);line-height:.9}.status-unknown{background:var(--lukalight)}.status-weak{background:#ffe5a3}.status-learning{background:var(--meikolight)}.status-known{background:var(--mikulight)}.mode-picker,.progress-block{display:grid;gap:12px}.home-mode-picker{justify-items:center}.home-mode-picker>.section-label{text-align:center}.home-start-actions{display:grid;gap:12px;justify-items:center}.home-start-actions>.primary-button{width:min(100%,280px)}.home-secondary-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.card-learning-button{display:inline-flex;width:min(100%,280px);min-height:48px;align-items:center;justify-content:center;gap:9px;padding:12px 18px;border:1px solid rgba(3,130,135,.42);border-radius:16px;background:linear-gradient(135deg,#8ff8e54d,#bfe9ff73);color:var(--mikudark);font-weight:800;box-shadow:0 5px 14px #03828714;transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}.card-learning-button>span{font-size:1.2rem;transform:rotate(-7deg)}.card-learning-button small{padding:3px 7px;border-radius:999px;background:#ffffffd1;color:#100258ad;font-size:.72rem}.card-learning-button:hover:not(:disabled){border-color:var(--mikudark);box-shadow:0 8px 18px #03828724;transform:translateY(-1px)}.card-learning-button:disabled{opacity:.46}.quiz-options-card{display:grid;gap:14px;padding:14px;background:#fff;border:1px solid var(--lightgrey);border-radius:18px}.quiz-option-row{display:grid;gap:8px}.filter-select{width:100%;min-height:48px;border:1px solid rgba(97,182,228,.72);border-radius:16px;padding:0 44px 0 16px;background:linear-gradient(45deg,transparent 50%,var(--mikudark) 50%) right 20px center / 7px 7px no-repeat,linear-gradient(135deg,var(--mikudark) 50%,transparent 50%) right 14px center / 7px 7px no-repeat,#fff;color:var(--kaitoblack);font:inherit;font-weight:700;-webkit-appearance:none;-moz-appearance:none;appearance:none}.segmented{display:flex;gap:10px;flex-wrap:wrap}.segmented button,.ghost-button,.primary-button,.option-button,.text-button{display:inline-flex;align-items:center;justify-content:center;border:1px solid transparent;border-radius:16px;padding:14px 18px;font-weight:700;line-height:1;text-decoration:none;transition:transform .16s ease,box-shadow .16s ease,background .16s ease,color .16s ease,border-color .16s ease}.segmented button{min-width:116px;height:43px;background:#fff;border-color:var(--mikudark);color:var(--mikudark);font-size:.875rem}.segmented button.active{background:var(--mikudark);color:#fff}.sliding-segmented{position:relative;isolation:isolate;display:flex;width:min(100%,520px);min-height:70px;padding:4px;border:2px solid var(--mikudark);border-radius:999px;background:#fff;box-shadow:inset 0 0 0 1px #0382870a}.sliding-segmented-indicator{position:absolute;z-index:0;top:4px;bottom:4px;left:4px;width:0;border-radius:999px;background:var(--mikudark);box-shadow:0 8px 18px #0382872e;opacity:0;pointer-events:none;will-change:left,width;transition:left .4s cubic-bezier(.65,0,.35,1),width .4s cubic-bezier(.65,0,.35,1),opacity .12s ease}.sliding-segmented-indicator[data-ready=true]{opacity:1}.sliding-segmented button{position:relative;z-index:1;overflow:hidden;flex:1;min-width:0;min-height:58px;padding:12px 18px;border:0;border-radius:999px;background:transparent;color:var(--mikudark);font-size:1.08rem;font-weight:800;line-height:1;transition:color .2s ease}.sliding-segmented button.active{color:#fff;transition-delay:.2s}.sliding-segmented-label{position:relative;z-index:1}.sliding-segmented-badge{position:relative;z-index:1;display:inline-flex;margin-left:5px;padding:3px 7px;border-radius:999px;font-size:.72rem;line-height:1}.pricing-cycle-segmented{width:min(100%,280px);min-height:52px;padding:5px;border:0;background:#dfeffc;box-shadow:none}.pricing-cycle-segmented .sliding-segmented-indicator{top:5px;bottom:5px;background:#fff;box-shadow:0 6px 18px #10025814}.pricing-cycle-segmented button{min-height:42px;padding:8px 14px;color:#10025894;font-size:.95rem;font-weight:700}.pricing-cycle-segmented button.active{color:var(--kaitoblack)}.pricing-cycle-segmented .sliding-segmented-badge{background:var(--meikomid);color:#fff;transition:background .2s ease,color .2s ease}.pricing-cycle-segmented button.active .sliding-segmented-badge{background:#0382871f;color:var(--mikudark);transition-delay:.2s}.sliding-segmented button:focus-visible{outline:3px solid rgba(222,0,118,.32);outline-offset:-4px}.compact-segmented button{min-width:104px;height:40px;padding:12px 14px;font-size:.82rem}.actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.streak-card{display:grid;gap:4px;padding:16px 18px;background:var(--brightgrey);border-radius:18px;color:var(--kaitoblack)}.streak-card strong{color:var(--mikudark);font-size:1rem;line-height:1.6}.streak-card span{color:#100258b8;font-size:.85rem;line-height:1.5}.column-card,.column-progress-card{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 18px;background:#fff;border:1px solid var(--lightgrey);border-radius:18px;color:var(--kaitoblack)}.column-card div,.column-progress-card div{display:grid;gap:4px;min-width:0}.column-card strong,.column-progress-card strong{color:var(--mikudark);font-size:1rem;line-height:1.45}.column-card span:not(.section-label),.column-progress-card span:not(.section-label){color:#100258b8;font-size:.82rem;line-height:1.5}.column-screen{gap:18px}.column-filter-tabs button{min-width:90px}.column-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.82fr);gap:18px;align-items:start}.column-list{display:grid;gap:10px}.column-list-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;width:100%;min-height:72px;border:1px solid var(--lightgrey);border-radius:16px;padding:12px 14px;background:#fff;color:var(--kaitoblack);text-align:left}.column-list-row.active{border-color:var(--mikudark);box-shadow:0 10px 24px #03828714}.column-list-row:disabled{opacity:.72}.column-list-order{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:999px;background:var(--brightgrey);color:var(--mikudark);font-weight:800}.column-list-main{display:grid;gap:4px;min-width:0}.column-list-main strong{overflow:hidden;color:var(--kaitoblack);font-size:.95rem;line-height:1.35;text-overflow:ellipsis;white-space:nowrap}.column-list-main small{color:#10025894;font-weight:700}.column-list-status{display:inline-flex;min-width:78px;justify-content:center;border-radius:999px;padding:6px 10px;background:var(--brightgrey);color:#100258ad;font-size:.76rem;font-weight:800}.column-list-status.unlocked{background:#0382871f;color:var(--mikudark)}.column-detail{position:sticky;top:18px;display:grid;gap:12px;scroll-margin-top:16px;border:1px solid var(--lightgrey);border-radius:18px;padding:18px;background:var(--brightgrey);color:var(--kaitoblack)}.column-detail-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:#1002589e;font-size:.8rem;font-weight:800}.column-illustration{display:block;width:100%;aspect-ratio:16 / 9;object-fit:cover;border:1px solid rgba(202,197,225,.72);border-radius:16px;background:#fff}.column-detail h3{margin:0;color:var(--kaitoblack);font-size:1.35rem;line-height:1.45}.column-detail p{margin:0;color:#100258c7;font-size:.98rem;font-weight:700;line-height:1.9}.column-unlock-modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:30;display:grid;place-items:center;padding:22px;background:#10025838;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.column-unlock-modal{display:grid;gap:14px;width:min(100%,440px);border:1px solid rgba(3,130,135,.22);border-radius:22px;padding:22px;background:#fff;color:var(--kaitoblack);box-shadow:0 22px 54px #1002582e}.column-unlock-modal h2{margin:0;color:var(--mikudark);font-size:1.65rem;line-height:1.35}.column-unlock-modal p{margin:0;color:#100258c2;font-weight:700;line-height:1.7}.column-unlock-preview{display:grid;gap:6px;border-radius:16px;padding:14px 16px;background:var(--brightgrey)}.column-unlock-preview span{color:#10025894;font-size:.8rem;font-weight:800}.column-unlock-preview strong{color:var(--kaitoblack);font-size:1.15rem;line-height:1.45}.column-unlock-actions{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:center}.account-card{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:16px 18px;background:#fff;border:1px solid var(--lightgrey);border-radius:18px;color:var(--kaitoblack)}.account-card div{display:grid;gap:4px;min-width:0}.account-heading{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.account-card strong{overflow-wrap:anywhere;color:var(--mikudark);font-size:1rem;line-height:1.45}.account-card span{color:#100258b8;font-size:.82rem;line-height:1.5}.account-status{display:inline-flex;width:fit-content;align-items:center;justify-content:center;min-height:24px;border-radius:999px;padding:4px 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