:root{--bg:#edf8f5;--bg2:#f6fbfa;--card:rgba(255,255,255,.94);--ink:#173b35;--muted:#68827d;--primary:#146b5a;--primary2:#0f584a;--mint:#d9f0e9;--cyan:#e4f5f7;--cyan-border:#b7e0e4;--border:#d8e9e4;--danger:#b94848;--danger-bg:#fae9e7;--good:#287a54;--good-bg:#dff3e7;--shadow:0 12px 35px rgba(30,91,78,.08);--radius:20px;--font:Inter,"Noto Sans JP","Noto Sans SC",system-ui,-apple-system,sans-serif}
*{box-sizing:border-box}html{background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px}body{margin:0;min-width:320px;min-height:100vh;background:radial-gradient(circle at 85% 0,#dff4ef 0,transparent 28rem),var(--bg);line-height:1.65}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(20,107,90,.24);outline-offset:2px}.app-shell{max-width:1180px;min-height:100vh;margin:auto;padding:0 28px 100px}.main-header{height:76px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:11px;font-size:22px}.plain-button{border:0;background:transparent;padding:4px}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:13px;background:var(--primary);color:#fff;font-size:18px;font-weight:800}.brand-mark.large{width:58px;height:58px;border-radius:19px;font-size:24px;margin:auto}.icon-button{display:grid;place-items:center;width:46px;height:46px;border:1px solid var(--border);background:rgba(255,255,255,.75);border-radius:50%}.icon-button svg{width:21px;fill:none;stroke:currentColor;stroke-width:1.8}.page{animation:fade .18s ease}.page-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:18px 0 24px}.page-head h1,.page-head h2{margin:0;font-size:clamp(28px,3vw,40px);line-height:1.25}.page-head p{margin:6px 0 0;color:var(--muted)}h1,h2,h3{letter-spacing:-.02em}.card{background:var(--card);border:1px solid rgba(194,222,215,.75);border-radius:var(--radius);box-shadow:var(--shadow)}.hero-card{padding:28px;display:grid;grid-template-columns:1fr auto;gap:24px}.collection-title{display:flex;align-items:center;gap:14px}.collection-icon,.row-icon{display:grid;place-items:center;background:var(--mint);color:var(--primary);border-radius:16px;width:52px;height:52px;font-weight:800}.collection-title h2{margin:0;font-size:24px}.collection-title p{margin:2px 0 0;color:var(--muted)}.link-button{border:0;background:transparent;color:var(--primary);font-weight:700;padding:10px}.progress{height:10px;background:#deebe8;border-radius:999px;overflow:hidden;grid-column:1/-1}.progress span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),#53a88f);border-radius:inherit}.hero-bottom{display:flex;align-items:center;gap:32px}.metric strong{display:block;font-size:28px;line-height:1.1}.metric span{color:var(--muted);font-size:14px}.btn{min-height:46px;border:1px solid transparent;border-radius:999px;padding:10px 22px;font-weight:750;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.18s ease}.btn:hover{transform:translateY(-1px)}.btn.primary{background:var(--primary);color:#fff;box-shadow:0 7px 18px rgba(20,107,90,.18)}.btn.primary:hover{background:var(--primary2)}.btn.outline{background:#fff;border-color:#a7c9c0;color:var(--primary)}.btn.ghost{background:var(--mint);color:var(--primary)}.btn.danger{background:var(--danger-bg);color:var(--danger)}.btn.wide{width:100%}.section-card{padding:24px;margin-top:22px}.section-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.section-title h2{font-size:21px;margin:0}.collection-row,.library-row,.history-row{width:100%;border:0;border-top:1px solid #e6f0ed;background:transparent;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px;text-align:left;padding:16px 4px}.collection-row:first-of-type{border-top:0}.row-icon{width:44px;height:44px;border-radius:14px}.row-main strong{display:block;font-size:17px}.row-main small{color:var(--muted)}.arrow{font-size:24px;color:#87a29c}.fab{position:fixed;right:max(26px,calc((100vw - 1180px)/2 + 28px));bottom:86px;width:58px;height:58px;border:0;border-radius:50%;background:var(--primary);color:white;font-size:30px;box-shadow:0 10px 25px rgba(20,107,90,.3);z-index:15}.bottom-nav{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);display:none;z-index:10;background:rgba(255,255,255,.93);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:999px;padding:5px}.bottom-nav button{border:0;background:transparent;min-width:90px;min-height:46px;border-radius:999px;color:var(--muted);font-size:13px}.bottom-nav span{display:block;font-size:18px;line-height:1}.bottom-nav button.active{background:var(--mint);color:var(--primary);font-weight:800}.form-card{padding:clamp(20px,4vw,36px)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.field{display:grid;gap:7px;font-weight:700}.field.full{grid-column:1/-1}.field small{font-weight:400;color:var(--muted)}input,textarea,select{width:100%;border:1px solid #c8ded8;background:#fbfefd;border-radius:14px;padding:13px 15px;min-height:50px}textarea{resize:vertical;min-height:116px;line-height:1.7}.form-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:20px}.preview{background:var(--cyan);border:1px solid var(--cyan-border);border-radius:22px;padding:clamp(20px,4vw,32px);margin-top:24px}.preview h3{margin:0 0 5px}.preview .translation{font-size:20px;color:#325a61;margin:0 0 20px}.jp-sentence{font-size:clamp(23px,3vw,32px);line-height:1.9;margin:10px 0}.romaji{color:#547b80;font-size:16px}.chunk-list{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.chunk{min-height:44px;padding:8px 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20px;color:var(--muted)}.practice-page{max-width:1100px;margin:auto}.practice-nav{position:sticky;top:0;z-index:20;margin:0 -28px;padding:12px 28px;display:grid;grid-template-columns:180px 1fr 180px;align-items:center;gap:20px;background:rgba(237,248,245,.94);backdrop-filter:blur(14px)}.practice-nav .back,.practice-nav .exit{border:0;background:transparent;font-weight:750}.practice-nav .exit{text-align:right}.thin-progress{height:6px;background:#d7e8e4;border-radius:99px;overflow:hidden}.thin-progress span{display:block;height:100%;background:var(--primary)}.practice-title{font-size:18px;margin:22px 0}.prompt-scene{display:grid;grid-template-columns:180px 1fr;gap:22px;align-items:center;margin-bottom:22px}.learner-art{height:145px;position:relative;display:grid;place-items:center}.learner-art .head{width:66px;height:66px;border-radius:50%;background:#f4cdb3;border:5px solid #fff;position:absolute;top:5px}.learner-art .hair{position:absolute;width:70px;height:35px;border-radius:40px 40px 10px 10px;background:#234d47;top:3px}.learner-art .body{width:105px;height:72px;background:#68aa98;border-radius:50px 50px 18px 18px;position:absolute;bottom:4px}.speech{position:relative;padding:25px 28px;font-size:clamp(22px,3vw,29px);font-weight:700}.speech:before{content:"";position:absolute;left:-14px;top:50%;border:14px solid transparent;border-right-color:#fff;border-left:0}.composer{padding:24px;min-height:138px}.placeholder{color:#9aaca8;font-size:18px}.chosen-list{display:flex;flex-wrap:wrap;gap:8px}.chosen{border:0;border-bottom:3px solid #78aa9d;background:#eaf5f1;border-radius:10px 10px 4px 4px;min-height:46px;padding:8px 11px;font-size:20px}.chosen.good{background:var(--good-bg);border-color:var(--good)}.chosen.bad{background:var(--danger-bg);border-color:var(--danger)}.candidate-area{padding:24px 4px;border-bottom:1px solid var(--border)}.candidate{min-height:48px;padding:9px 17px;background:#fff;border:1px solid #b8d5ce;border-radius:999px;color:var(--primary);font-size:18px;font-weight:700}.candidate:disabled{opacity:.25;cursor:default}.practice-actions{display:grid;grid-template-columns:1fr auto 1.4fr;gap:14px;padding:22px 0}.answer-card{padding:24px;margin-top:20px}.answer-card h3{margin-top:0;color:var(--good)}ruby{ruby-position:over}rt{font-size:.5em;color:var(--muted);font-weight:500}.correct-display{font-size:clamp(22px,3vw,30px);line-height:2.1}.report-summary{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-bottom:22px}.stat-card{padding:20px;text-align:center}.stat-card strong{display:block;font-size:30px}.report-item{padding:22px;margin-bottom:14px}.report-item.wrong{border-left:5px solid #d77970}.report-item.correct{border-left:5px solid #62a582}.report-item.skipped{border-left:5px solid #d3ab5a}.report-line{display:grid;grid-template-columns:110px 1fr;gap:15px;margin:8px 0}.report-line span:first-child{color:var(--muted)}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.settings-grid .card{padding:24px}.modal-backdrop{position:fixed;inset:0;background:rgba(16,46,40,.46);display:grid;place-items:center;padding:20px;z-index:100;backdrop-filter:blur(5px)}.modal{width:min(440px,100%);background:#fff;border-radius:24px;padding:30px;box-shadow:0 30px 80px rgba(15,50,43,.25)}.modal h1{margin:12px 0 2px;text-align:center}.modal>p{text-align:center;color:var(--muted)}.modal label{display:grid;gap:5px;margin-top:14px;font-weight:700}.form-error{color:var(--danger)!important;min-height:25px;text-align:left!important}.hidden{display:none!important}.toast{position:fixed;top:18px;left:50%;transform:translateX(-50%);max-width:min(560px,calc(100vw - 32px));background:#163f37;color:#fff;border-radius:14px;padding:12px 18px;z-index:200;box-shadow:var(--shadow)}.toast.error{background:#863f3f}@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important;transition:none!important}}
@media(max-width:800px){.app-shell{padding:0 16px 104px}.main-header{height:66px}.hero-card{grid-template-columns:1fr}.hero-card>.btn{width:100%}.hero-bottom{justify-content:space-between}.form-grid,.settings-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.toolbar{grid-template-columns:1fr}.practice-nav{margin:0 -16px;padding:10px 16px;grid-template-columns:110px 1fr 85px}.prompt-scene{grid-template-columns:100px 1fr;gap:12px}.learner-art{transform:scale(.72);margin:-20px}.speech{padding:20px}.report-summary{grid-template-columns:repeat(2,1fr)}.bottom-nav{display:flex}.fab{right:18px;bottom:86px}.page-head{align-items:flex-start;flex-direction:column}.practice-actions{grid-template-columns:1fr 1fr}.practice-actions .primary{grid-column:1/-1;grid-row:1}.report-line{grid-template-columns:1fr;gap:0}.row-stats{flex-wrap:wrap}.library-row{grid-template-columns:26px 1fr}.row-actions{grid-column:2}.hero-card{padding:21px}.section-card{padding:19px}}
@media(max-width:480px){.prompt-scene{grid-template-columns:1fr}.learner-art{height:80px;transform:scale(.56);margin:-28px}.speech:before{display:none}.speech{font-size:20px}.hero-bottom{gap:15px}.metric strong{font-size:24px}.chunk,.candidate{font-size:16px}.composer{padding:18px}.practice-nav{grid-template-columns:95px 1fr 72px;font-size:13px}.report-summary{gap:8px}.stat-card{padding:14px 8px}.stat-card strong{font-size:24px}}

/* Unified secondary navigation and compact mint surfaces. */
.btn:hover{transform:none}.btn:active,.small-btn:active,.candidate:active,.chunk:active{opacity:.78}.back-arrow{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--border);border-radius:50%;background:#fff;color:var(--primary);font-size:22px}.settings-title,.preview-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:18px}.settings-title h2,.preview-head h3,.practice-picker h2{margin:0;font-size:21px}.settings-title p,.preview-head p,.practice-picker p{margin:3px 0 0;color:var(--muted)}.config-status{display:inline-flex;align-items:center;white-space:nowrap;border-radius:999px;padding:6px 11px;font-size:13px;font-weight:750}.config-status.ok{background:var(--good-bg);color:var(--good)}.config-status.warn{background:#fff2d9;color:#8a641d}.check-row{display:flex!important;grid-template-columns:none!important;align-items:center;gap:10px;margin-top:16px!important}.check-row input{width:20px;min-height:20px}.settings-help{grid-column:1/-1}.connection-result{margin-top:16px;border-radius:14px;padding:12px 14px;font-size:14px;font-weight:650}.connection-result.pending{background:#edf5f3;color:var(--muted)}.connection-result.success{background:var(--good-bg);color:var(--good)}.connection-result.failure{background:var(--danger-bg);color:var(--danger)}
.preview{background:var(--card);border-color:rgba(194,222,215,.75);border-radius:var(--radius);padding:24px;margin-top:22px;box-shadow:var(--shadow)}.preview-fields{display:grid;gap:0;border:1px solid var(--border);border-radius:15px;overflow:hidden;background:#fbfefd}.preview-fields>div{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:12px 16px;border-top:1px solid var(--border)}.preview-fields>div:first-child{border-top:0}.preview-fields span{color:var(--muted);font-size:14px}.preview-fields strong,.preview-fields p{margin:0;font-weight:500}.preview-fields .preview-jp{font-size:19px;line-height:1.7}.preview-chunks{margin:16px 0}.error-text{color:var(--danger)}
.practice-picker{padding:22px;margin-bottom:20px;display:grid;grid-template-columns:minmax(150px,.5fr) 1.5fr;gap:18px;align-items:center}.count-options{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:9px}.count-option{min-width:68px;min-height:44px;border:1px solid #a7c9c0;border-radius:999px;background:#fff;color:var(--primary);font-weight:750}.count-option.active{background:var(--mint);border-color:var(--primary)}.custom-count{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:700}.custom-count input{width:90px;min-height:44px;padding:8px 11px}.practice-picker>.status-note{grid-column:1/-1;margin:0}.candidate.used{opacity:.25}.practice-actions:has(.retry-current){grid-template-columns:1fr 1fr 1.2fr 1.4fr}.retry-current{white-space:nowrap}.answer-card .correct-display{font-size:clamp(20px,2.4vw,26px);line-height:1.8}
@media(max-width:800px){.settings-help{grid-column:auto}.practice-picker{grid-template-columns:1fr}.count-options{justify-content:flex-start}.practice-picker>.status-note{grid-column:auto}.preview-fields>div{grid-template-columns:1fr;gap:2px}.practice-actions:has(.retry-current){grid-template-columns:1fr 1fr}.practice-actions:has(.retry-current) .primary{grid-column:auto;grid-row:auto}.retry-current{order:3}.practice-actions .primary{order:4}}
@media(max-width:480px){.settings-title,.preview-head{align-items:flex-start;flex-direction:column}.count-options{display:grid;grid-template-columns:repeat(2,1fr);width:100%}.custom-count{grid-column:1/-1}.custom-count input{flex:1}.count-options>.btn{grid-column:1/-1}.practice-actions:has(.retry-current){grid-template-columns:1fr}.back-arrow{width:40px;height:40px}.brand{font-size:20px}}
.practice-nav .exit{white-space:nowrap}