:root{color-scheme:dark;--bg:#141716;--panel:#1c201e;--panel-hover:#242b26;--line:#343c36;--text:#f0f3eb;--muted:#abb5aa;--accent:#d7ef9c;--ink:#202816;--error:#ffb1a5;--success:#c9efae;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);min-width:320px}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:5px}button{transition:background .18s,transform .18s}button:hover:not(:disabled){transform:translateY(-1px)}.shell{max-width:1160px;margin:auto;padding:0 42px}.header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:30px 0;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;font-size:30px;font-weight:800;letter-spacing:-1.5px}.brand-mark{display:grid;place-items:center;background:var(--accent);color:var(--ink);width:38px;height:38px;border-radius:10px;font-size:25px;font-weight:500;letter-spacing:0}.brand-dot{color:var(--accent)}.header-right{display:flex;align-items:center;gap:20px}.tag{font-size:10px;letter-spacing:1.4px;border:1px solid var(--line);padding:7px 10px;border-radius:6px;color:var(--accent);font-weight:700}.header-caption{font-size:12px;color:var(--muted)}main{min-height:calc(100svh - 183px);padding:64px 0 68px}.setup,.practice,.results{max-width:730px;margin:0 auto}.eyebrow{color:var(--accent);font-size:11px;letter-spacing:2px;font-weight:700;text-transform:uppercase;display:flex;align-items:center;gap:8px}.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}h1{font-size:clamp(34px,5vw,52px);letter-spacing:-1.8px;line-height:1.15;margin:20px 0 16px;font-weight:600}h1 em{font-style:normal;color:var(--accent)}.intro{font-size:15px;line-height:1.8;color:var(--muted);max-width:570px;margin:0 0 34px}.tabs{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:28px}.tab{text-align:left;border:1px solid var(--line);border-radius:14px;background:var(--panel);color:var(--text);padding:20px;display:flex;align-items:center;gap:15px}.tab.active{border-color:var(--accent);background:#252d20}.tab-kanji{font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;font-size:30px;color:var(--muted)}.tab.active .tab-kanji{color:var(--accent)}.tab-title{font-size:15px;font-weight:650;display:block}.tab-description{font-size:11px;color:var(--muted);display:block;margin-top:5px}.tab-check{margin-left:auto;color:var(--accent);font-size:19px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:0 0 14px}.section-heading h2{font-size:13px;font-weight:600;margin:0}.text-button{background:none;border:0;padding:5px 0;color:var(--accent);font-size:12px}.forms{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.form-option{position:relative;display:flex;align-items:start;gap:10px;border:1px solid var(--line);background:var(--panel);padding:14px 12px;border-radius:9px;cursor:pointer;min-height:84px}.form-option:has(input:checked){background:#23291f;border-color:#526344}.form-option input{accent-color:var(--accent);margin:3px 0 0;flex-shrink:0;width:14px;height:14px}.form-name{font-size:11px;line-height:1.5;display:block}.form-example{display:block;color:var(--muted);font-size:13px;margin-top:6px}.setup-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:28px;border-top:1px solid var(--line);padding-top:24px}.length-control{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:10px}select{border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--text);padding:10px 30px 10px 12px}.primary{border:0;border-radius:10px;padding:15px 24px;background:var(--accent);color:var(--ink);font-weight:700;font-size:14px;display:inline-flex;justify-content:center;align-items:center;gap:30px}.primary:hover:not(:disabled){background:#e3f6ba}.secondary{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:10px;padding:14px 20px;font-size:13px}.note{font-size:11px;color:var(--muted);line-height:1.7;margin:20px 0 0}.error-message{color:var(--error);font-size:13px;min-height:20px;margin:10px 0 0}.practice-top{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:22px}.back-button{background:none;border:0;color:var(--muted);font-size:12px;padding:6px 0}.progress-label{font-size:12px;color:var(--muted)}.progress-label strong{color:var(--text);font-weight:500}.progress-track{height:3px;border-radius:2px;background:var(--line);margin-bottom:30px;overflow:hidden}.progress-fill{height:100%;background:var(--accent);transition:width .25s}.practice-card{border:1px solid var(--line);background:var(--panel);border-radius:20px;padding:35px 42px;text-align:center}.card-meta{display:flex;align-items:center;justify-content:center;gap:8px;font-size:10px;color:var(--muted);letter-spacing:1px}.meta-dot{color:#647261}.word{font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-weight:500;font-size:clamp(44px,7vw,68px);line-height:1.5;margin:22px 0 0;letter-spacing:3px}.reading{font-size:18px;color:var(--accent);min-height:28px;margin:0 0 20px}.target{color:var(--muted);font-size:13px;margin:0 0 24px;line-height:1.6}.target strong{color:var(--accent);display:block;font-size:19px;margin-top:5px;font-weight:500}.answer-label{display:block;text-align:left;font-size:11px;color:var(--muted);margin-bottom:10px}.answer-input{width:100%;border:1px solid #576252;border-radius:12px;background:var(--bg);color:var(--text);padding:18px 20px;font-size:27px;text-align:center;min-height:76px}.answer-input::placeholder{font-size:17px;color:#788477}.answer-input.correct{border-color:var(--success)}.answer-input.wrong{border-color:var(--error)}.practice-actions{margin-top:14px;display:flex;gap:10px}.practice-actions .primary{width:100%}.helper-actions{display:flex;justify-content:center;gap:25px;margin-top:20px}.helper-actions button{font-size:11px;color:var(--muted)}.keyboard-note{font-size:10px;color:var(--muted);margin:20px 0 0}kbd{font-family:inherit;border:1px solid var(--line);border-radius:4px;padding:2px 5px;font-size:10px}.feedback{text-align:left;border:1px solid var(--line);border-radius:12px;padding:22px;margin-top:22px;background:#20291e}.feedback.wrong{background:#2b2320;border-color:#63443c}.feedback-title{font-size:16px;color:var(--success);font-weight:650;margin:0 0 10px}.feedback.wrong .feedback-title{color:var(--error)}.answer-display{font-size:22px;line-height:1.65;overflow-wrap:anywhere}.answer-alternatives{font-size:12px;color:var(--muted);line-height:1.7;margin-top:5px}.meaning{font-size:15px;margin:15px 0 10px}.explanation{font-size:12px;line-height:1.8;color:var(--muted);margin:0}.session-stats{display:flex;justify-content:center;gap:25px;margin-top:20px;font-size:12px;color:var(--muted)}.session-stats strong{color:var(--text);font-weight:500}.results{text-align:center}.results .eyebrow{justify-content:center}.score-circle{width:166px;height:166px;border:1px solid #617746;background:#242e1d;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;margin:35px auto}.score-number{font-size:44px;color:var(--accent);letter-spacing:-2px}.score-caption{font-size:11px;color:var(--muted);margin-top:5px}.results .intro{margin:0 auto 28px}.result-metrics{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:12px;overflow:hidden}.metric{padding:22px 10px;background:var(--panel)}.metric+.metric{border-left:1px solid var(--line)}.metric strong{display:block;font-size:24px;font-weight:500}.metric span{display:block;font-size:11px;color:var(--muted);margin-top:8px}.result-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin:28px 0}.missed-list{text-align:left;margin-top:35px}.missed-list h2{font-size:14px;margin-bottom:15px}.missed-row{border-top:1px solid var(--line);padding:16px 0;display:flex;justify-content:space-between;gap:15px}.missed-word{font-size:18px}.missed-detail{font-size:11px;color:var(--muted);margin-top:5px;line-height:1.7}.missed-answer{font-size:18px;color:var(--accent);text-align:right}.hint-badge{font-size:10px;color:var(--muted);margin-top:5px}footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:23px 0;font-size:10px;color:var(--muted);letter-spacing:.4px}
@media(min-width:1000px){.setup h1{max-width:620px}.setup{max-width:730px}}
@media(max-width:640px){.shell{padding:0 20px}.header{padding:22px 0}.header-caption{display:none}.header-right{gap:8px}.brand{font-size:25px}.brand-mark{width:32px;height:32px;font-size:22px}main{padding:38px 0 45px;min-height:calc(100svh - 153px)}h1{letter-spacing:-1px}.intro{font-size:13px;margin-bottom:24px}.tab{padding:15px 12px;gap:10px}.tab-kanji{font-size:24px}.tab-description{font-size:10px}.forms{grid-template-columns:1fr 1fr}.form-option{padding:12px 10px}.setup-bottom{flex-direction:column;align-items:stretch;gap:20px}.length-control{justify-content:space-between}.setup-bottom .primary{width:100%}.practice-card{padding:25px 20px;border-radius:15px}.practice-top{margin-bottom:16px}.progress-track{margin-bottom:20px}.word{letter-spacing:1px}.target strong{font-size:17px}.answer-input{font-size:25px}.feedback{padding:16px}.helper-actions{gap:20px}.session-stats{gap:18px}.result-metrics .metric{padding:20px 5px}footer{font-size:9px}.missed-row{gap:10px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

/* Difficulty selection and beginner-friendly prompts. */
.mode-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:28px}
.mode-option{display:flex;align-items:flex-start;gap:12px;text-align:left;padding:17px 15px;border:1px solid var(--line);border-radius:12px;background:var(--panel);color:var(--text)}
.mode-option.active{background:#252d20;border-color:var(--accent)}
.mode-level{font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:5px 7px;flex-shrink:0}
.mode-option.active .mode-level{color:var(--accent);border-color:#526344}
.mode-title{display:block;font-size:14px;font-weight:650;margin:3px 0 7px}
.mode-description{display:block;font-size:11px;color:var(--muted);line-height:1.6}
.form-guide{font-size:11px;line-height:1.7;color:var(--muted);margin:-4px 0 14px}
.form-style{display:block;font-size:10px;line-height:1.5;color:var(--accent);margin-top:5px}
.target-compact strong{font-size:20px;line-height:1.5;margin:0}
.target-hint{display:block;font-size:14px;color:var(--muted);line-height:1.7;margin-top:10px}
@media(max-width:640px){.mode-options{grid-template-columns:1fr}.mode-option{padding:14px}.mode-description{font-size:12px}.target-compact strong{font-size:18px}.card-meta{flex-wrap:wrap;line-height:1.8}}