:root{color-scheme:light;--ink:#263c37;--muted:#61736d;--green:#245d54;--light:#e9f0e9;--paper:#fffef9;--bg:#f4f3ec;--line:#d9dfd3;--orange:#ad522c;--red:#a23e32;--radius:22px;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic",Meiryo,sans-serif;font-synthesis:none;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0;padding:0 max(24px,env(safe-area-inset-right)) 0 max(24px,env(safe-area-inset-left));line-height:1.65}a{color:var(--green)}button,input,select{font:inherit}button,a,input,select{ -webkit-tap-highlight-color:transparent}button{cursor:pointer;min-height:48px;border:1px solid var(--line);border-radius:12px;padding:11px 19px;background:var(--paper);color:var(--ink);font-weight:650;touch-action:manipulation}button:hover{background:#edf1e7}button:disabled{opacity:.5;cursor:wait}button.primary{background:var(--green);color:white;border-color:var(--green)}button.primary:hover{background:#184d44}button.quiet{background:transparent}button.small{padding:8px 12px;font-size:.9rem}button.danger{color:var(--red)}:focus-visible{outline:3px solid #d27e48;outline-offset:4px}input,select{min-height:50px;border:1px solid #aebbb1;border-radius:12px;padding:10px 14px;max-width:100%;background:white;color:var(--ink)}input[type=checkbox]{min-height:auto;width:20px;height:20px}input[type=file]{font-size:.85rem;width:100%}.site-header{max-width:1120px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:27px 0;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;font-size:1.1rem;font-weight:750;white-space:nowrap}.brand small{display:block;font-size:.61rem;letter-spacing:.14em;font-weight:500;color:var(--muted)}.brand-mark{display:grid;place-items:center;width:46px;height:46px;border-radius:13px;background:var(--green);color:white;font-size:1.6rem;font-family:Georgia,serif}nav{display:flex;gap:5px}nav a{font-size:.9rem;color:var(--muted);text-decoration:none;padding:10px 15px;border-radius:10px}nav a[aria-current=page]{background:var(--light);color:var(--green);font-weight:700}main{max-width:1120px;margin:40px auto 60px;min-height:65vh}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(1.8rem,4vw,2.8rem);line-height:1.5;letter-spacing:-.035em;margin-bottom:17px}h2{font-size:1.15rem;line-height:1.6}h3{font-size:1rem}.eyebrow{font-size:.7rem;letter-spacing:.16em;font-weight:700;color:var(--green);text-transform:uppercase;margin-bottom:15px}.muted,.help{color:var(--muted)}.help{font-size:.85rem;line-height:1.8}.hero-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:35px;align-items:stretch}.hero-copy{padding:25px 10px 22px 0}.hero-copy>p{max-width:470px}.tag{display:inline-block;padding:5px 11px;border-radius:6px;background:#ece9de;font-size:.75rem;color:#666449;margin-right:7px}.lesson-card{background:var(--green);color:#fffef9;border-radius:var(--radius);padding:29px;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}.lesson-card .eyebrow{color:#c9ddd0}.lesson-card p{color:#d7e6dc}.lesson-card h2{font-size:1.5rem}.lesson-card button.primary{background:#f8f2da;color:#264d43;border-color:#f8f2da;width:100%;font-size:1.05rem}.lesson-meta{display:flex;gap:24px;padding:18px 0 24px;font-size:.85rem}.lesson-meta strong{display:block;font-size:1.7rem;color:#fff}.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:28px 0}.metric{background:var(--paper);border:1px solid var(--line);border-radius:17px;padding:23px}.metric small{color:var(--muted);font-size:.8rem}.metric strong{font-size:2rem;line-height:1.8;display:block;letter-spacing:-.04em}.metric strong span{font-size:.85rem;font-weight:500;margin-left:6px;color:var(--muted)}.section-row{display:flex;justify-content:space-between;align-items:baseline;gap:15px;margin:30px 0 13px}.section-row h2{margin:0}.panel{background:var(--paper);border:1px solid var(--line);padding:26px;border-radius:var(--radius)}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}.note-list{list-style:none;margin:0;padding:0}.note-list li{display:flex;gap:15px;align-items:flex-start;padding:16px 0;border-top:1px solid var(--line)}.note-list li:first-child{border-top:0;padding-top:0}.note-index{font-family:Georgia,serif;font-size:1.25rem;color:var(--orange)}.note-list p{font-size:.85rem;margin:3px 0;color:var(--muted)}.empty{padding:26px 0;color:var(--muted)}.badge{display:inline-block;font-size:.72rem;background:var(--light);color:var(--green);padding:4px 9px;border-radius:6px;white-space:nowrap}.badge.warn{color:#944928;background:#f9eee0}.badge.long{background:#e2ead1;color:#3f5a23}.actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.study-shell{max-width:760px;margin:auto}.study-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:19px;gap:12px}.study-top p{margin:0}.progress-track{height:5px;background:#dfe5d8;border-radius:8px;margin-bottom:27px;overflow:hidden}.progress-fill{height:100%;background:var(--green)}.study-card{background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:32px 38px;box-shadow:0 12px 35px #273d3307}.study-card .word{font-size:clamp(2.2rem,6vw,3.4rem);font-weight:650;line-height:1.4;letter-spacing:.02em;font-family:Georgia,"Times New Roman",serif;overflow-wrap:anywhere;margin:10px 0}.study-card h1.cue{font-size:clamp(1.4rem,4vw,2rem);letter-spacing:0;margin:18px 0}.meaning-display{font-size:1.25rem;margin:0 0 21px}.example{border-left:3px solid #a5bda6;padding:7px 0 7px 18px;margin:22px 0}.example p{margin:2px 0}.example .english{font-size:1.1rem}.answer-form label{display:block;font-size:.83rem;color:var(--muted);margin-bottom:8px}.answer-input{width:100%;font-size:1.55rem;min-height:64px;padding:12px 16px;scroll-margin-block:20px}.answer-form .actions{margin-top:18px}.answer-form .primary{flex:1;min-width:160px}.hint{background:#f6efdc;border-radius:12px;padding:12px 16px;margin:15px 0;color:#705128}.feedback-heading{font-size:1.4rem;color:var(--green);margin:10px 0}.feedback-heading.wrong{color:var(--orange)}.answer-compare{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:15px 0}.answer-compare>div{border-radius:12px;padding:12px 15px;background:#f2f3eb;overflow-wrap:anywhere}.answer-compare strong{display:block;font-size:1.35rem}.answer-compare .entered{color:#915038}.result-summary{font-size:1.15rem}.large-number{font-size:2.3rem;color:var(--green)}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.9rem;text-align:left}th{font-size:.75rem;color:var(--muted);font-weight:600}td,th{padding:14px 12px;border-bottom:1px solid var(--line)}td:first-child,th:first-child{padding-left:0}.word-button{font-family:Georgia,serif;font-size:1.2rem;border:none;padding:4px;background:none;text-decoration:underline;text-underline-offset:4px}.word-table td{vertical-align:middle}.word-row-note{display:block;font-size:.72rem;color:var(--muted)}.search{width:min(100%,350px);margin:0 0 20px}.settings-group{margin:20px 0}.settings-group>label{display:block;margin-bottom:7px}.settings-group .checkbox{display:flex;align-items:center;gap:12px}.data-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.callout{background:#edf0e4;border-radius:12px;padding:16px 20px;font-size:.85rem;line-height:1.8}.error{color:var(--red)}#notice{max-width:1120px;margin:15px auto;padding:12px 18px;border-radius:12px;background:#f5e4cd;color:#704123}footer{max-width:1120px;margin:0 auto;padding:24px 0 30px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:.75rem}.loading{padding:70px 0;text-align:center}.skip-link{position:fixed;left:20px;top:-80px;z-index:5;background:white;padding:10px}.skip-link:focus{top:10px}dialog{border:1px solid var(--line);border-radius:22px;width:min(620px,calc(100% - 30px));max-height:85vh;padding:26px;color:var(--ink);background:var(--paper)}dialog::backdrop{background:#213e3870}.dialog-head{display:flex;justify-content:space-between;gap:20px;align-items:center}dialog h2{font-size:2rem;font-family:Georgia,serif;margin:0}.detail-meta{display:flex;gap:12px;margin:16px 0}#restore-preview{margin-top:20px}.session-note{font-size:.8rem;color:var(--muted);margin:18px 0}.link-button{border:0;background:none;color:var(--green);text-decoration:underline}.backup-alert{font-size:.8rem;color:#946135;margin-top:17px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}[hidden]{display:none!important}@media(max-width:760px){body{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}.site-header{align-items:flex-start;flex-direction:column;gap:16px;padding:19px 0}nav{width:100%;justify-content:space-between}nav a{padding:8px 10px;font-size:.82rem}main{margin-top:23px}.hero-grid,.two-col,.data-grid{grid-template-columns:1fr}.hero-copy{padding:10px 0 0}.hero-copy h1{font-size:1.95rem}.lesson-card{padding:24px}.metric-grid{gap:9px;margin-top:19px}.metric{padding:14px 11px}.metric strong{font-size:1.65rem}.metric small{font-size:.69rem}.panel{padding:20px}.study-card{padding:25px 22px}.study-top .help{font-size:.73rem}.answer-form .actions{gap:9px}.answer-form button{padding:10px 13px}.answer-compare{grid-template-columns:1fr 1fr;gap:8px}.answer-compare>div{padding:10px}.word-table td,.word-table th{padding:12px 6px}.badge{font-size:.64rem;padding:4px 6px}footer{flex-direction:column;gap:3px}}@media(prefers-reduced-motion:no-preference){button,a{transition:background .15s ease}}@media(max-height:600px){main{margin-top:18px}.study-card{padding:20px}.study-top,.progress-track{margin-bottom:12px}.study-card .word{font-size:2.3rem}}
@media(max-width:900px){.hero-grid,.two-col,.data-grid{grid-template-columns:1fr}.hero-copy{padding-bottom:0}.lesson-meta{gap:32px}.lesson-meta>div{min-width:80px}}
.study-card .help,.study-card .word-note,dialog p,dialog .help{font-size:1rem;line-height:1.9}
.example .english{font-size:1.2rem;line-height:1.8;overflow-wrap:anywhere}
.study-card .session-note{font-size:.9rem;line-height:1.8}
.study-shell{padding-bottom:var(--keyboard-space,0px)}
.answer-form .actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.answer-form .primary{grid-column:1/-1;width:100%;min-width:0}
.answer-input{scroll-margin-top:16px}
.memory-tip{margin:12px 0 20px;font-size:1rem}
.memory-tip summary{cursor:pointer;min-height:44px;padding:8px 0;color:var(--green)}
.memory-tip p{margin:4px 0;line-height:1.9}
.practice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.practice-card{display:flex;flex-direction:column;gap:10px}
.practice-card h2,.practice-card p{margin:0}.practice-card button{margin-top:auto;width:100%}
.context-choices{border:0;padding:0;margin:20px 0;display:grid;gap:12px}
.context-choices label{display:flex;align-items:center;gap:13px;padding:14px;border:1px solid var(--line);border-radius:12px;min-height:52px;cursor:pointer}
.context-choices input{width:22px;height:22px;min-height:0;flex:none;accent-color:var(--green)}
.practice-choice-form>.actions button{min-height:48px}.forms-table strong{font-size:1.2rem}
.forms-table td{vertical-align:top}.forms-table button{display:block;margin-top:8px;min-height:44px}
@media(max-width:900px){.practice-grid{grid-template-columns:1fr}}
:root{color-scheme:light}
.daily-progress{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:22px 0}
.daily-progress progress{width:min(100%,320px);accent-color:#245d54;height:12px}
.learning-diagram{width:100%;height:auto;min-height:190px;background:#fafbf8;border-radius:16px;margin:16px 0}
.learning-diagram text{font:19px system-ui,sans-serif;fill:#273e35}
.learning-diagram .diagram-role{font-size:15px}
button[aria-pressed="true"]{background:#dceadf;border-color:#245d54}
main>.panel+.panel{margin-top:22px}
.actions a.button{display:inline-flex;align-items:center;min-height:48px;padding:11px 15px;border:1px solid var(--line);border-radius:12px;text-decoration:none;background:var(--paper);font-weight:650}
.achievement{animation:note-arrive .4s ease-out}
@keyframes note-arrive{from{opacity:.4;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
@media(prefers-reduced-motion:reduce){.achievement{animation:none}}
@media(max-width:650px){.daily-progress{display:block}.learning-diagram text{font-size:21px}}
.diagram-stage{background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:16px;display:flex;flex-direction:column;gap:12px}
.diagram-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.diagram-top h1{font-size:1.35rem;line-height:1.35;margin:0;letter-spacing:0}
.diagram-workspace{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;min-height:0}
.diagram-picture{margin:0;min-width:0;min-height:0;display:flex;flex-direction:column}
.scene-art{display:block;width:100%;height:100%;min-height:150px;max-height:390px;flex:1;background:#f6f7ee;border-radius:14px}
.scene-art text{font:26px -apple-system,BlinkMacSystemFont,"Hiragino Sans",sans-serif;fill:#344d43}
.diagram-picture figcaption{font-size:1rem;line-height:1.45;margin-top:7px;text-align:center}
.diagram-sidebar{display:flex;flex-direction:column;justify-content:center;gap:12px;min-width:0;min-height:0}
.diagram-sentence{display:flex;align-items:center;gap:6px;border-left:4px solid #91ae95;padding-left:12px}
.diagram-sentence p{font-size:1.55rem;line-height:1.45;margin:0;flex:1;font-family:Georgia,"Times New Roman",serif}
.diagram-sentence mark{background:#e6edcf;color:#254f42;border-radius:4px;padding:1px 3px;font-weight:700}
.diagram-sentence button{flex-shrink:0}
.diagram-explanation{font-size:1rem;line-height:1.65;margin:0}
.diagram-controls{display:flex;flex-direction:column;gap:9px}
.diagram-controls fieldset{border:0;padding:0;margin:0;min-width:0}
.diagram-controls legend{font-size:.9rem;color:var(--muted);padding:0;margin-bottom:4px}
.diagram-controls fieldset>div{display:flex;gap:7px;flex-wrap:wrap}
.diagram-controls button{font-size:1rem;min-height:44px;padding:7px 12px;flex:1;white-space:nowrap}
.diagram-exit{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.diagram-exit button{min-height:44px;font-size:1rem;padding:7px 14px}
.diagram-exit span{font-size:.85rem;color:var(--muted);margin-left:auto}
.verb-reference-heading{margin:22px 0 8px;font-size:1.2rem}
.forms-table strong{font-size:1.4rem;overflow-wrap:anywhere}
body.diagram-fit{height:var(--diagram-height,100vh);min-height:0;overflow:hidden;display:flex;flex-direction:column;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}
.diagram-fit .site-header{width:100%;padding:7px 0;gap:12px;flex-direction:row;align-items:center;flex-shrink:0}
.diagram-fit .brand-mark{width:34px;height:34px;font-size:1.25rem}
.diagram-fit .brand small{display:none}
.diagram-fit nav{width:auto}
.diagram-fit nav a{display:inline-flex;align-items:center;min-height:44px;padding:7px 10px}
.diagram-fit main{width:100%;flex:1;min-height:0;margin:8px auto;display:flex;flex-direction:column}
.diagram-fit body>footer,.diagram-fit>footer{display:none}
.diagram-fit #notice{flex-shrink:0;margin:4px auto;padding:5px 10px}
.diagram-fit .diagram-stage{flex:1;min-height:0;padding:12px;gap:10px}
.diagram-fit .diagram-workspace{flex:1;grid-template-rows:minmax(145px,1fr) auto}
.diagram-fit .scene-art{max-height:none;min-height:0}
.diagram-fit.diagram-wide .diagram-workspace{grid-template-columns:minmax(0,1.2fr) minmax(290px,.9fr);grid-template-rows:minmax(0,1fr);align-items:stretch}
.diagram-fit.diagram-wide .diagram-sidebar{gap:10px}
.diagram-fit.diagram-wide .diagram-picture figcaption{min-height:46px;display:flex;align-items:center;justify-content:center}
@media(max-width:699px){.diagram-stage{padding:12px}.diagram-exit span{width:100%;margin:0}.diagram-sentence p{font-size:1.4rem}}
.diagram-fit.diagram-tight .diagram-controls{gap:5px}.diagram-fit.diagram-tight .diagram-sidebar{gap:8px}.diagram-fit.diagram-tight .diagram-exit span{display:none}
.home-practice h2{margin:0}.home-practice .section-row{margin-bottom:12px}
.home-practice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.practice-entry{display:flex;flex-direction:column;gap:5px;text-align:left;text-decoration:none;border:2px solid #71978a;border-radius:12px;background:#f0f6ee;padding:14px 16px;color:#263c37;font:inherit;min-width:0;min-height:104px;cursor:pointer;touch-action:manipulation}.practice-entry:hover,.practice-entry:active{background:#e0ecde;border-color:#245d54}.practice-entry:focus{outline:3px solid #ad522c;outline-offset:3px}.home-diagram{margin-top:16px;width:100%;background:#f4f1df;border-color:#9b8d5c}.home-diagram:hover,.home-diagram:active{background:#ece7cc}
.practice-entry strong{font-size:1rem;color:var(--green)}.practice-entry span{font-size:.9rem;line-height:1.55;font-weight:400}
.home-practice-links{display:flex;gap:12px 22px;flex-wrap:wrap;margin-top:12px;font-size:.9rem}
.diagram-top>button{flex-shrink:0;min-height:44px}.diagram-top h1{text-align:right}
.scene-art{stroke-linecap:round;stroke-linejoin:round}
@media(max-width:499px){.home-practice-grid{grid-template-columns:1fr}.diagram-top{align-items:flex-start}.diagram-top h1{font-size:1.1rem}}
.home-lesson{display:block;min-height:0;padding:24px 28px}.home-lesson h1{font-size:1.85rem;margin:4px 0 10px;line-height:1.35}.home-lesson>.primary{width:min(100%,360px);margin:10px 0}
.home-scope{margin:12px 0 0}.home-secondary{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:18px 0 10px}.home-guide summary{cursor:pointer;min-height:44px;padding:8px 0}.home-guide p{margin:0 0 12px;max-width:680px}
.compact-progress{padding:12px 18px;margin:16px 0;gap:14px}.compact-progress span{white-space:nowrap}.compact-progress progress{flex:1;min-width:60px;max-width:260px}.compact-progress a{white-space:nowrap;font-size:.9rem}
.interrupted-sessions{margin:12px 0;border-top:1px solid var(--line);padding-top:12px}.interrupted-sessions h2{font-size:1rem;margin:0 0 8px}.interrupted-sessions>.help{margin:8px 0 0}.resume-row{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin:8px 0}.resume-row .actions{gap:8px}
.study-top{margin-bottom:12px}.session-actions{gap:8px;justify-content:flex-end}.study-card{padding:24px 28px}.study-card .word{margin:6px 0;font-size:clamp(2rem,5vw,3rem)}.answer-input{min-height:56px}.answer-form .actions{margin-top:12px}.study-card .session-note{margin:12px 0 0}
@media(max-width:650px){.home-lesson{padding:20px}.compact-progress{display:flex;flex-wrap:wrap}.compact-progress progress{max-width:none}.study-top{align-items:flex-start;flex-wrap:wrap}.session-actions{justify-content:flex-start}.study-card{padding:20px}.resume-row>.actions{width:100%}}
/* Resume is the primary action in either kind of saved session. */
.interrupted-sessions .resume-row{justify-content:flex-start;gap:8px 12px;padding:12px;background:var(--paper);border:1px solid #93ac9c;border-radius:12px;color:var(--ink)}
.interrupted-sessions .resume-row .resume-primary{display:flex;align-items:center;justify-content:center;flex:1;min-width:200px;min-height:52px;width:auto;padding:12px 16px;border:1px solid var(--green);border-radius:10px;background:var(--green);color:#fffef9;font:inherit;font-weight:700;text-decoration:none;text-align:center;touch-action:manipulation}
.interrupted-sessions .resume-row .resume-primary:hover{background:#184d44}.interrupted-sessions .resume-row .resume-primary:focus{outline:3px solid #ad522c;outline-offset:3px}
.interrupted-sessions .resume-row .resume-end{flex:none;min-height:44px;padding:8px;color:#52645e;border-color:transparent;background:transparent;font-weight:400;font-size:.85rem;text-decoration:underline;text-underline-offset:3px}
/* Only questions, feedback and results use the wider reading surface. */
.learning-screen{width:100%;max-width:1040px}
.learning-screen .study-card{padding:20px 24px}
.feedback-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:16px 28px}
.feedback-summary,.feedback-material{min-width:0}
.feedback-summary .feedback-heading{margin:0 0 12px;font-size:1.6rem}
.feedback-summary .answer-compare{margin:0 0 14px}
.answer-context{display:block;font-size:1rem;line-height:1.65;margin-top:5px}
.learning-point{padding:12px 14px;background:#edf3e9;border-left:3px solid var(--green);border-radius:8px}
.learning-point h2{margin:0 0 5px;font-size:.9rem}.learning-point p{margin:0;font-size:1rem;line-height:1.75}
.feedback-reason{margin:0 0 12px;font-size:1rem;line-height:1.75}
.feedback-material .example{margin:10px 0 12px}.feedback-material .example:first-child{margin-top:0}
.feedback-material .memory-tip summary{min-height:44px;padding:8px 0;cursor:pointer}.feedback-material .memory-tip p{margin:4px 0 12px;font-size:1rem;line-height:1.75}
.feedback-actions{display:flex;justify-content:flex-end;margin-top:16px}.feedback-actions>.primary{min-width:200px;min-height:48px}
@media(min-width:960px){.learning-screen .feedback-layout{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:start}}
@media(max-width:650px){.learning-screen .study-card{padding:18px 16px}.interrupted-sessions .resume-row .resume-primary{min-width:0;flex-basis:100%}.feedback-actions>.primary{width:100%}}
@media(max-width:480px){.feedback-summary .answer-compare{grid-template-columns:1fr}}