:root{--bg:#f5f6f2;--paper:#fff;--ink:#203b36;--muted:#69756f;--line:#e0e6df;--green:#264e42;--lime:#d4edaa;--sage:#e5eee2;--orange:#a8502d;--peach:#fae9dc;--red:#9c3d34;--shadow:0 8px 32px #243c3410;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Noto Sans CJK JP","Yu Gothic",sans-serif;color:var(--ink);background:#e8ece6;font-synthesis:none;-webkit-tap-highlight-color:transparent;color-scheme:light}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{cursor:pointer;border:0;color:inherit;background:none;touch-action:manipulation}button:active{transform:scale(.975)}button:disabled{opacity:.45;cursor:wait}button,a,input,select{outline-offset:4px}button:focus-visible,a:focus-visible{outline:3px solid #689357}input:focus,select:focus{outline:2px solid #729c65;outline-offset:1px}a{color:var(--green)}h1,h2,h3,p{margin:0}h1{font-size:29px;line-height:1.55;letter-spacing:-.035em}h2{font-size:19px;line-height:1.6}h3{font-size:15px;line-height:1.65}p{line-height:1.8}small{font-size:12px}svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.app{max-width:480px;margin:auto;min-height:100dvh;background:var(--bg);position:relative;box-shadow:0 0 100px #22392f0c;overflow:clip}.screen{padding:0 24px calc(110px + env(safe-area-inset-bottom));animation:appear .2s ease}.topbar{height:86px;display:flex;align-items:center;justify-content:space-between;padding:env(safe-area-inset-top) 24px 0;gap:12px}.brand{display:flex;gap:10px;align-items:center;font-size:20px;font-weight:750;letter-spacing:.015em}.brand img{width:33px;height:33px}.brandmark{background:var(--green);color:var(--lime);border-radius:14px;display:grid;place-items:center;width:54px;height:54px;font-size:25px}.avatar{width:42px;height:42px;border-radius:50%;background:#e7ecdF;border:1px solid #dce3d6;font-weight:700;font-size:15px;display:grid;place-items:center}.eyebrow{font-size:10px;letter-spacing:.15em;font-weight:750;color:var(--muted);text-transform:uppercase}.muted{color:var(--muted)}.small{font-size:12px}.row{display:flex;align-items:center;justify-content:space-between;gap:12px}.stack{display:grid;gap:16px}.section-head{display:flex;justify-content:space-between;align-items:center;margin:28px 0 14px}.section-head h2{font-size:17px}.greeting{font-size:13px;color:var(--muted);margin:8px 0 4px}.hello{margin-bottom:22px;font-size:27px}.pill{display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:30px;background:var(--sage);color:var(--green);font-size:11px;font-weight:650;white-space:nowrap}.pill.orange{background:var(--peach);color:var(--orange)}.pill.outline{background:none;border:1px solid var(--line)}.hero{background:#203f38;border-radius:27px;padding:25px 24px;color:#fff;position:relative;overflow:hidden;min-height:225px}.hero>*:not(canvas){position:relative;z-index:1}.hero canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;opacity:.8}.hero .eyebrow{color:#c2d5bf}.hero h2{font-size:27px;font-weight:650;line-height:1.65;margin:13px 0 10px;letter-spacing:-.035em}.hero p{font-size:12px;color:#d5dfd3;max-width:270px}.hero .hero-note{display:flex;align-items:center;gap:7px;margin-bottom:20px}.hero-note i{width:6px;height:6px;border-radius:50%;background:var(--lime)}.primary{background:var(--green);color:#fff;border-radius:16px;min-height:54px;padding:14px 20px;display:flex;align-items:center;justify-content:center;gap:10px;width:100%;font-weight:650;font-size:15px;transition:background .15s,transform .1s}.primary.light{background:var(--lime);color:#1c3c2b;justify-content:space-between}.secondary{min-height:48px;border:1px solid var(--line);border-radius:14px;background:white;font-weight:600;padding:12px 18px;font-size:14px;display:flex;justify-content:center;align-items:center;gap:8px;width:100%}.text-button{font-size:12px;color:var(--green);min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:4px;padding:4px 8px}.text-button svg{width:16px;height:16px}.stats-strip{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}.stat-tile{padding:17px 18px;background:#fff;border:1px solid var(--line);border-radius:19px}.stat-tile .label{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted)}.stat-tile svg{width:17px;height:17px}.stat-tile strong{font-size:30px;font-weight:600;letter-spacing:-.04em;display:inline-block;margin-top:8px}.stat-tile small{margin-left:5px;color:var(--muted)}.card{border:1px solid var(--line);border-radius:23px;padding:20px;background:#fff}.map-card{padding:20px 19px 16px}.memory-map{display:block;width:100%;height:138px;margin:12px 0 10px}.legend{display:flex;flex-wrap:wrap;gap:12px;font-size:10px;color:var(--muted)}.legend span{display:flex;align-items:center;gap:5px}.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#e4e9e0}.dot.learning{background:#d48b58}.dot.growing{background:#92b28b}.dot.steady{background:#335c47}.era-preview{display:flex;align-items:center;gap:13px;margin-top:13px;padding-top:15px;border-top:1px solid var(--line)}.era-icon{height:40px;width:40px;background:var(--sage);border-radius:13px;display:grid;place-items:center}.era-preview p{font-size:12px;color:var(--muted)}.dock{position:fixed;z-index:10;bottom:calc(16px + env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);width:min(calc(100% - 40px),432px);display:flex;justify-content:space-around;background:#ffffffed;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border:1px solid #dce3d7;border-radius:25px;padding:7px;box-shadow:0 8px 30px #18322514}.dock button{flex:1;min-height:52px;border-radius:17px;font-size:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;color:var(--muted)}.dock button.active{background:var(--sage);color:var(--green);font-weight:700}.dock svg{width:20px;height:20px}.page-title{margin:8px 0 5px;font-size:27px}.subtitle{color:var(--muted);font-size:12px;margin-bottom:22px}.field{display:grid;gap:8px;font-size:12px;font-weight:650}.field input,.field select,.search{border:1px solid var(--line);background:#fff;border-radius:13px;width:100%;min-height:50px;padding:12px 14px;color:var(--ink);font-size:16px;appearance:none}.field small{color:var(--muted);font-weight:400;line-height:1.6}.form{display:grid;gap:19px}.auth-screen{padding-bottom:40px}.auth-intro{margin:10px 0 27px}.auth-intro h1{font-size:32px;line-height:1.6}.auth-intro h1 em{font-style:normal;color:#6e9260}.auth-intro p{font-size:12px;color:var(--muted);margin-top:12px}.auth-art{height:113px;width:100%;margin:6px 0 14px;border-radius:20px;background:#e8efdf}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;margin:25px 0 23px;border-bottom:1px solid var(--line)}.auth-tabs button{padding:14px 10px;color:var(--muted);border-bottom:2px solid transparent;font-size:14px}.auth-tabs button.selected{color:var(--green);border-color:var(--green);font-weight:700}.fineprint{font-size:10px;line-height:1.8;color:var(--muted);margin-top:20px}.inline-error{background:#fff0e7;color:#87422d;padding:12px;border-radius:12px;font-size:12px;line-height:1.6}.filters{display:flex;gap:7px;overflow:auto;margin:16px -24px 20px;padding:0 24px 4px;scrollbar-width:none}.filters button{flex-shrink:0;padding:10px 14px;border-radius:30px;border:1px solid var(--line);background:#fff;font-size:12px;min-height:42px}.filters button.selected{background:var(--green);color:#fff;border-color:var(--green)}.search-wrap{position:relative}.search-wrap svg{position:absolute;top:15px;left:14px;width:18px;height:18px;color:var(--muted)}.search{padding-left:43px}.catalog-list{display:grid;gap:10px}.event-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.event-card>button{display:flex;text-align:left;gap:14px;padding:18px 16px;width:100%;align-items:center}.event-year{font-size:24px;letter-spacing:-.03em;min-width:59px;color:var(--green);font-variant-numeric:tabular-nums}.event-year small{font-size:10px;margin-left:2px}.event-heading{flex:1}.event-heading p{font-size:13px;font-weight:600;line-height:1.65}.event-heading small{font-size:10px;color:var(--muted);display:block;margin-top:4px}.event-detail{border-top:1px solid var(--line);padding:17px}.mnemonic{font-size:20px;line-height:1.85;letter-spacing:.025em;font-weight:650;overflow-wrap:anywhere}mark{color:inherit;background:linear-gradient(transparent 60%,#e6edb0 60%);padding:0 1px}.event-detail .mnemonic{font-size:16px}.event-detail .small{margin-top:12px}.empty{padding:30px 10px;text-align:center;color:var(--muted);font-size:13px;line-height:1.9}.progress-row{margin:19px 0}.progress-row .row{font-size:12px}.track{height:5px;border-radius:10px;overflow:hidden;background:#e9eee4;margin-top:9px}.track meter{width:100%;height:5px;display:block;appearance:none}.track meter::-webkit-meter-bar{background:#e9eee4;border:0}.track meter::-webkit-meter-optimum-value{background:#71915f}.track meter::-moz-meter-bar{background:#71915f}.activity{display:flex;gap:11px;justify-content:space-between;margin-top:18px}.day{display:flex;align-items:center;flex-direction:column;gap:8px;flex:1;font-size:10px;color:var(--muted)}.day .day-mark{width:32px;height:32px;background:#f0f3eb;border-radius:11px;display:grid;place-items:center;font-size:12px}.day.done .day-mark{background:var(--sage);color:var(--green)}.day.today .day-mark{outline:1px solid #7f9b73;outline-offset:3px}.day .day-mark svg{width:16px;height:16px}.settings-section{margin:26px 0}.settings-section h2{margin-bottom:18px;font-size:16px}.info-box{font-size:12px;line-height:1.9;background:var(--sage);padding:17px 19px;border-radius:17px}.study-head{padding:14px 22px 9px;padding-top:calc(14px + env(safe-area-inset-top));display:flex;align-items:center;gap:12px}.icon-button{height:44px;width:44px;border-radius:50%;display:grid;place-items:center;background:#eaf0e4;flex-shrink:0}.study-head .study-title{flex:1;font-size:13px;font-weight:650}.study-head small{font-size:11px;font-weight:400;color:var(--muted);display:block;margin-top:3px}.session-track{margin:0 24px;height:3px;background:#e3e9dc;border-radius:8px}.session-track progress{width:100%;height:3px;display:block;appearance:none;border:0}.session-track progress::-webkit-progress-bar{background:#e3e9dc}.session-track progress::-webkit-progress-value{background:#8eaa75;border-radius:3px}.session-track progress::-moz-progress-bar{background:#8eaa75}.study-screen{padding:21px 24px max(15px,env(safe-area-inset-bottom));min-height:calc(100dvh - 79px);display:flex;flex-direction:column;gap:17px}.question-area{flex:1;min-height:120px}.question-label{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.question{font-size:23px;line-height:1.65;font-weight:650;letter-spacing:-.025em;overflow-wrap:anywhere}.question-prompt{font-size:12px;color:var(--muted);margin-top:8px}.hint-box{padding:17px 19px;background:#f0ede0;border:1px solid #e5e1cb;border-radius:19px;animation:appear .2s}.hint-box .eyebrow{color:#7b754d;margin-bottom:7px;letter-spacing:.07em;font-size:11px}.hint-box .mnemonic{font-size:19px}.hint-help{font-size:11px;color:#706d51;line-height:1.7;margin-top:8px}.year-reveal{margin-top:9px;border-top:1px solid #dbd9bf;padding-top:10px;display:flex;align-items:center;justify-content:space-between;gap:10px}.year-reveal span{font-size:12px;color:#716b4b}.year-reveal strong{font-size:32px;letter-spacing:.08em;font-variant-numeric:tabular-nums}.answer-area{margin:0 0 10px;display:flex;justify-content:center;align-items:center;gap:12px;min-height:67px}.year-output{font-family:inherit;font-variant-numeric:tabular-nums;font-weight:600;font-size:40px;letter-spacing:.16em;color:var(--green);min-width:177px;text-align:center;line-height:1.35;min-height:56px;border-bottom:2px solid #b0c49c}.year-output.empty-output{color:#bac7b2}.year-unit{font-size:14px;color:var(--muted);align-self:center}.keypad{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;user-select:none}.key{height:54px;border-radius:15px;background:#fff;border:1px solid #dfe5d9;box-shadow:0 2px 0 #dfe5d955;font-size:24px;line-height:1;display:flex;align-items:center;justify-content:center;transition:background .1s,transform .08s}.key:active{background:var(--sage);box-shadow:none}.key.soft{background:#eaf0e4;border-color:transparent;color:#536f48;font-size:12px}.key svg{width:22px;height:22px}.answer-controls{display:grid;gap:8px}.answer-controls .primary{margin-top:10px;min-height:51px}.skip{min-height:38px;color:var(--muted);font-size:12px;width:100%;margin-top:1px}.feedback-top{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--green);margin-bottom:10px}.feedback-top .check-circle{background:var(--lime);width:31px;height:31px;border-radius:50%;display:grid;place-items:center}.feedback-year{font-size:54px;font-variant-numeric:tabular-nums;letter-spacing:-.03em;line-height:1.25;margin:12px 0 3px}.feedback-year small{font-size:16px;margin-left:7px}.feedback-event{font-size:17px;line-height:1.6;margin-bottom:17px}.timeline{border-left:1px solid #cdd8c3;margin:16px 0 10px 5px;padding-left:17px;display:grid;gap:15px}.timeline div{position:relative;display:grid;grid-template-columns:44px 1fr;gap:10px;font-size:11px;color:var(--muted);line-height:1.65}.timeline div:before{content:"";position:absolute;left:-21px;top:6px;width:7px;height:7px;border-radius:50%;background:#c8d3bf;border:2px solid var(--bg)}.timeline div.current{color:var(--green);font-weight:650}.timeline div.current:before{background:var(--green)}.review-note{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);margin:12px 0 6px}.review-note svg{width:16px;height:16px}.feedback-actions{margin-top:auto;display:grid;gap:7px}.summary-hero{text-align:center;padding:25px 0}.summary-circle{width:85px;height:85px;border-radius:50%;background:var(--sage);display:grid;place-items:center;margin:0 auto 20px;border:1px solid #d5e0ca;box-shadow:0 0 0 9px #eaf0e3}.summary-circle svg{width:32px;height:32px;stroke-width:1.3}.summary-hero h1{font-size:28px}.summary-hero p{font-size:12px;color:var(--muted);margin-top:10px}.summary-stats{display:grid;grid-template-columns:1fr;margin:15px 0 22px}.summary-stats div{text-align:center;padding:8px;border-right:1px solid var(--line)}.summary-stats div:last-child{border:0}.summary-stats strong{font-size:30px;font-weight:600;display:block}.summary-stats small{font-size:10px;color:var(--muted)}#toast{position:fixed;z-index:30;bottom:105px;left:50%;transform:translate(-50%,15px);width:max-content;max-width:calc(100% - 48px);padding:13px 19px;border-radius:16px;background:#203b36;color:white;font-size:12px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.2s;line-height:1.7}#toast.show{opacity:1;transform:translate(-50%,0)}.error-banner{position:sticky;top:0;z-index:20;background:#fbe5d6;padding:12px 20px;font-size:12px;line-height:1.7;display:flex;gap:8px;align-items:center}.error-banner button{font-weight:700;min-height:44px;min-width:64px;border:1px solid #c8a388;border-radius:10px}.boot{min-height:100dvh;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:18px}.boot p{font-size:25px;font-weight:650}.boot span.muted{font-size:12px}.source-note{font-size:10px;color:var(--muted);line-height:1.8;margin-top:21px}.sep{height:1px;background:var(--line);margin:25px 0}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.bar-chart{height:130px;width:100%;display:block}.form-success{font-size:12px;color:var(--green);margin-top:10px}.danger{color:var(--red)}
@keyframes appear{from{opacity:.5;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:600px){body{background:radial-gradient(ellipse at 20% 10%,#f3f4ed,transparent 65%),#e7ece5}.app{border-left:1px solid #e0e5db;border-right:1px solid #e0e5db}}
@media(max-height:740px){.study-screen{gap:11px;padding-top:16px}.question-area{min-height:90px}.question{font-size:21px}.question-label{margin-bottom:10px}.key{height:47px}.answer-area{min-height:56px;margin-bottom:8px}.hint-box{padding:12px 15px}.hint-box .mnemonic{font-size:17px}.study-head{padding-top:8px;padding-bottom:6px}.study-screen{min-height:calc(100dvh - 63px)}}
@media(max-width:359px){.screen{padding-left:18px;padding-right:18px}.study-screen{padding-left:18px;padding-right:18px}.topbar{padding-left:18px;padding-right:18px}.hero{padding:22px 20px}.hero h2{font-size:25px}.question{font-size:20px}.legend{gap:7px}.activity{gap:5px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.hero-start{margin-top:24px}.home-session-title{margin-bottom:13px}.row+.hero{margin-top:13px}.record-unit{font-size:14px;color:#d1dfc9;font-weight:400}.catalog-list{margin-top:12px}.summary-buttons{margin-top:25px}.settings-section+.sep+.stack{margin-bottom:24px}
@font-face{font-family:Rekigoro Noto;src:url('/static/fonts/noto-sans-jp.woff2?v=3?v=5') format('woff2');font-weight:100 900;font-display:swap} :root{font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Rekigoro Noto","Noto Sans CJK JP","Yu Gothic",sans-serif}
.question-mode{height:calc(100dvh - 79px - env(safe-area-inset-top));min-height:0;gap:12px}.prompt-scroll{flex:1;min-height:0;overflow:auto;scrollbar-width:thin;overscroll-behavior:contain;padding:0 1px 4px}.prompt-scroll .question-area{min-height:0}.prompt-scroll .hint-box{margin-top:14px}.question-mode .answer-controls{flex-shrink:0;display:block}.question-mode:has(.hint-box) .question{font-size:19px}.question-mode:has(.hint-box) .question-prompt{display:none}.question-mode:has(.hint-box) .question-label{margin-bottom:10px}
@media(max-height:740px){.question-mode{height:calc(100dvh - 61px - env(safe-area-inset-top));min-height:0}.question-mode .key{height:46px}.question-mode .year-output{font-size:34px;min-height:47px}.question-mode .answer-area{min-height:49px;margin-bottom:7px}.question-mode .question{font-size:20px}.question-mode:has(.hint-box) .question{font-size:18px}.question-mode .primary{min-height:48px;margin-top:8px}.question-mode .hint-box{margin-top:11px}}
.brand{min-height:44px}.avatar{width:44px;height:44px}.filters button{min-height:44px}.skip{min-height:44px}
.daily-progress{border-bottom:1px solid var(--line);padding:18px 3px 12px;font-size:12px}.daily-progress .row{align-items:flex-start}.daily-progress strong{white-space:nowrap}.daily-progress p{color:var(--muted);font-size:11px;margin-top:6px}.mastery-note{font-size:13px;line-height:1.8;color:var(--green);padding-top:16px}

.home-hero{min-height:0;padding-top:20px;padding-bottom:24px}.home-hero h2{margin-top:0;font-size:24px}.activity-card{margin-top:20px}.page-title{margin-bottom:20px}

.extra-options{margin-top:20px}.extra-options h2{margin-bottom:16px;font-size:17px}

.reference-note{margin-top:20px;padding:16px;border-left:3px solid var(--line);font-size:14px;line-height:1.8;color:var(--muted)}.reference-note p{margin:0 0 8px}.reference-note details{font-size:12px}.reference-note summary{cursor:pointer}.reference-note ul{margin:8px 0;padding-left:18px}.reference-note a{color:var(--green);overflow-wrap:anywhere}