@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;600;700&display=swap');
:root{--ink:#172b2b;--muted:#687a77;--green:#176b5b;--mint:#e5f3e9;--paper:#f6f7f2;--line:#dce5de;--gold:#f2c66d}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:'DM Sans','Noto Sans JP',sans-serif;padding-bottom:env(safe-area-inset-bottom)}.top{height:calc(68px + env(safe-area-inset-top));padding:env(safe-area-inset-top) max(22px,calc((100vw - 920px)/2)) 0;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#fbfcf8}.brand{font-weight:700;font-size:20px;color:var(--ink);text-decoration:none;letter-spacing:-.5px}.brand span{color:var(--green)}main{max-width:820px;margin:0 auto;padding:34px 22px max(80px,calc(80px + env(safe-area-inset-bottom)))}.welcome{padding:55px 0 44px}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:700;color:var(--green)}h1{font-size:clamp(34px,8vw,56px);line-height:1.27;letter-spacing:-2px;margin:18px 0}.welcome p:not(.eyebrow){color:var(--muted)}button,.button{border:0;border-radius:14px;padding:14px 20px;font:600 15px inherit;cursor:pointer}.primary{background:var(--green);color:white;box-shadow:0 5px 12px #176b5b26}.subtle{background:white;border:1px solid var(--line);color:var(--ink)}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;margin:14px 0;box-shadow:0 7px 22px #19332708}.card h2,.card h3{margin-top:0}.muted{color:var(--muted);font-size:14px}.nav{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 22px}.nav button{padding:10px 14px;background:#e9eee8;color:var(--ink)}.nav button.active{background:var(--green);color:white}input,textarea{font:inherit;width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);margin:6px 0 14px}textarea{min-height:150px;resize:vertical}.label{font-size:13px;font-weight:600}.sentence{font-size:clamp(25px,6vw,38px);line-height:1.9;letter-spacing:-.5px}.segment{display:inline-block;margin:0 3px;padding:0 4px;border-radius:8px}.word{border-bottom:2px dotted #78a994;cursor:pointer}.slash{color:#99aaa1;padding:0 3px}.mic{width:72px;height:72px;border-radius:50%;font-size:27px;background:var(--green);color:white;box-shadow:0 8px 18px #176b5b38}.mic.recording{background:#bd4f48;animation:pulse 1.3s infinite}@keyframes pulse{50%{box-shadow:0 0 0 12px #bd4f4822}}.answer{font-size:19px;line-height:1.8}.badge{padding:5px 9px;border-radius:99px;background:var(--mint);color:var(--green);font-size:12px}.error{color:#a83d36}.success{color:var(--green)}.modal{position:fixed;inset:0;background:#172b2b66;display:grid;place-items:center;padding:max(20px,env(safe-area-inset-top)) max(20px,env(safe-area-inset-right)) max(20px,env(safe-area-inset-bottom)) max(20px,env(safe-area-inset-left))}.modalbox{background:white;border-radius:20px;padding:24px;max-width:450px;width:100%}.hidden{display:none!important}.listitem{display:flex;justify-content:space-between;align-items:center;gap:10px;border-bottom:1px solid var(--line);padding:14px 0}.listitem:last-child{border:0}.install-hint{position:fixed;z-index:5;left:max(12px,env(safe-area-inset-left));right:max(12px,env(safe-area-inset-right));bottom:max(12px,env(safe-area-inset-bottom));max-width:680px;margin:auto;padding:15px 48px 15px 16px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 8px 28px #172b2b20;font-size:14px;line-height:1.55}.install-hint button{margin-top:10px;padding:9px 13px;background:var(--green);color:#fff;font-size:13px}.install-hint .dismiss{position:absolute;right:8px;top:8px;padding:5px 10px;background:transparent;color:var(--muted)}@media(max-width:600px){main{padding:20px 16px max(50px,calc(50px + env(safe-area-inset-bottom)))}.welcome{padding:40px 0 25px}.card{padding:18px;border-radius:17px}.top{padding-right:16px;padding-left:16px}.sentence{line-height:2}}
.install-hint{position:relative;left:auto;right:auto;bottom:auto;z-index:auto;width:calc(100% - 32px);max-width:820px;margin:14px auto 0;padding:16px 18px;background:#e5f3e9;border:1px solid var(--line);box-shadow:none}
.install-hint[hidden]{display:none}
.install-hint button{margin:12px 0 0}
.install-guide{margin-top:12px;padding:12px 14px;background:#fff;border:1px solid var(--line);border-radius:12px}
.install-guide p{margin:0 0 8px}
.install-guide ol{margin:0;padding-left:1.4em}
.install-guide li{padding:4px 0}
.material-row{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.material-row:last-child{border-bottom:0}.material-info{min-width:0}.material-info b{overflow-wrap:anywhere}
.sentence-edit,.preview-item{margin:12px 0;padding:14px;border:1px solid var(--line);border-radius:14px;background:#fff}
.sentence-edit-head,.preview-item-head{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.sentence-edit textarea,.preview-item textarea{margin:10px 0 4px;min-height:80px}
.row input,.row select{flex:1;min-width:160px}
select{font:inherit;padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);margin:6px 0 14px;width:100%}
.small{padding:7px 10px;font-size:13px}.danger{color:#a83d36;border:1px solid #edcfcb;background:#fff}.warning{padding:4px 8px;border-radius:8px;background:#fff3d6;color:#765518;font-size:12px}
.preview-item.is-heading{background:#f2f5f1}.preview-item-head label{display:flex;align-items:center;gap:5px}.preview-item-head input{width:auto;margin:0}
.preview-tools{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:8px 0}
.import-title-row{justify-content:space-between;margin-bottom:12px}.import-title-row h2{margin:0}
.analysis-lock{position:fixed;inset:0;z-index:10000;display:grid;place-items:center;padding:20px;background:#172b2bcc;cursor:wait}.analysis-lock-panel{display:flex;align-items:center;gap:14px;max-width:360px;padding:22px 26px;border-radius:18px;background:#fff;box-shadow:0 12px 36px #0003}.analysis-lock-panel p{margin:0;font-weight:600}.analysis-spinner{width:24px;height:24px;flex:0 0 24px;border:3px solid var(--line);border-top-color:var(--green);border-radius:50%;animation:analysis-spin .8s linear infinite}@keyframes analysis-spin{to{transform:rotate(360deg)}}body.analysis-running{overflow:hidden}
.import-box{max-height:calc(100dvh - 40px);overflow:auto}.import-box input[type=file]{padding:10px;background:#fff}
button:disabled{opacity:.55;cursor:wait}
@media(max-width:600px){.material-row{align-items:flex-start;flex-direction:column}.material-row .row{width:100%}.material-row .row button{flex:1}.sentence-edit-head,.preview-item-head{align-items:flex-start}.install-hint{margin-left:auto;margin-right:auto}}
.study-page .study-count{margin:0 0 6px}.study-toolbar{gap:8px;margin:0 0 8px}.study-toolbar button{padding:8px 12px;font-size:13px}.study-page .study-sentence-card,.study-page .study-answer-card{margin:0 0 8px;padding:14px}.study-page .sentence{line-height:1.55}.speak-inline{display:inline-flex;align-items:center;justify-content:center;padding:2px 5px;margin-left:3px;border-radius:8px;background:transparent;color:var(--green);font-size:18px;vertical-align:middle}.study-voice-row{gap:9px}.study-page .mic{width:48px;height:48px;font-size:21px;box-shadow:0 4px 10px #176b5b30}.voice-stop{width:34px;height:34px;padding:0;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink);font-size:14px;line-height:1}.voice-stop:disabled{opacity:.4}.study-answer-card textarea{min-height:76px;height:76px;margin:4px 0 8px;padding:10px 12px}.study-submit-row{gap:8px}.study-submit-row button{padding:10px 14px;font-size:14px}