:root{--bg:#f6f7f3;--paper:#fff;--ink:#253b38;--muted:#788781;--subtle:#ecf0eb;--mint:#2c7868;--mint-soft:#e4f3ec;--orange:#efb66b;--orange-soft:#fff2dd;--stroke:#e7ece6;--shadow:0 10px 34px rgba(29,55,43,.052);--radius:23px;--tab-h:79px;color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#e8efea;font:15px/1.55 -apple-system,BlinkMacSystemFont,"SF Pro Text","Noto Sans TC","Noto Sans JP","Hiragino Kaku Gothic ProN",sans-serif;-webkit-font-smoothing:antialiased}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}a{color:var(--mint)}.app-shell{margin:0 auto;max-width:480px;min-height:100dvh;background:var(--bg);position:relative;box-shadow:0 16px 80px rgba(39,58,45,.11);padding-bottom:calc(var(--tab-h) + env(safe-area-inset-bottom) + 20px);overflow:hidden}
@media(max-width:540px){body{background:var(--bg)}.app-shell{box-shadow:none;max-width:none}}
.top{padding:calc(env(safe-area-inset-top) + 24px) 24px 17px}.top-head{display:flex;justify-content:space-between;align-items:center}.brand{display:flex;align-items:center;gap:11px}.brand-logo{display:grid;place-items:center;height:43px;width:43px;border-radius:15px;background:var(--mint);color:white;font-size:20px;font-weight:900;box-shadow:0 5px 10px #2c786828}.brand-title{font-weight:800;letter-spacing:.035em;font-size:18px}.brand-sub{font-size:10px;letter-spacing:.17em;font-weight:650;color:var(--muted);margin-top:-2px}.icon-btn{border:1px solid var(--stroke);background:#fff;border-radius:14px;display:inline-grid;place-items:center;width:43px;height:43px;color:var(--ink)}.icon-btn svg,.tab svg,.btn svg,.linkbutton svg,.mini-action svg{width:19px;height:19px;stroke-width:1.9}.datebar{padding:18px 24px 0;font-size:12px;color:var(--muted);font-weight:600;letter-spacing:.05em}.main{padding:4px 21px 28px}.heading{font-size:29px;line-height:1.35;letter-spacing:-.055em;font-weight:830;margin:3px 0 8px}.heading span{color:var(--mint)}.subtitle{color:var(--muted);font-size:13px;line-height:1.65}.seg{display:flex;gap:4px;padding:5px;background:#edf1eb;border-radius:15px;width:fit-content;margin:16px 0 23px}.seg button{border:0;border-radius:11px;padding:9px 18px;color:var(--muted);font-size:13px;font-weight:730;background:transparent;transition:.15s}.seg button.active{color:var(--mint);background:white;box-shadow:0 3px 9px #244b3212}.home-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:16px 0}.stat{background:var(--paper);border:1px solid var(--stroke);border-radius:19px;padding:18px;box-shadow:var(--shadow)}.stat .v{font-size:29px;font-weight:820;letter-spacing:-.045em;line-height:1.15}.stat .label{color:var(--muted);font-size:11px;margin-top:7px}.stat .v small{font-size:14px;color:var(--muted)}.spotlight{background:var(--mint);color:white;border-radius:25px;padding:21px 22px 22px;overflow:hidden;position:relative;margin:8px 0 24px;box-shadow:0 13px 30px #2c786822}.spotlight:before,.spotlight:after{content:"";position:absolute;border:1px solid #ffffff35;border-radius:50%;height:200px;width:200px;right:-90px;top:-104px;pointer-events:none}.spotlight:after{height:130px;width:130px;right:10px;top:-30px;border-color:#ffffff20}.spotlight .eyebrow{color:#c5ebe0;font-size:11px;font-weight:750;letter-spacing:.16em}.spotlight h2{position:relative;font-size:23px;line-height:1.43;margin:12px 0 7px;max-width:270px;letter-spacing:-.035em}.spotlight p{color:#d5efe8;font-size:12px;margin:0 0 18px;max-width:275px}.spotlight button{border:0;color:var(--mint);background:white;border-radius:12px;padding:10px 17px;font-weight:800;display:flex;align-items:center;gap:9px}.title-row{display:flex;justify-content:space-between;align-items:center;margin:27px 1px 13px}.section-title{font-weight:790;font-size:17px;letter-spacing:-.02em}.linkbutton{border:0;color:var(--mint);background:transparent;font-weight:720;font-size:12px;display:flex;align-items:center;gap:2px}.note-card{border-radius:19px;padding:17px 17px 15px;background:white;border:1px solid var(--stroke);box-shadow:var(--shadow);margin-bottom:10px;position:relative}.note-head{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:9px}.tag{font-size:10px;font-weight:760;letter-spacing:.01em;background:var(--mint-soft);color:var(--mint);padding:5px 9px;border-radius:7px;display:inline-block}.tag.english{background:#eef0ff;color:#6266a9}.tag.yellow{background:var(--orange-soft);color:#9b672e}.tiny{color:var(--muted);font-size:10px}.note-text{font-size:15px;line-height:1.65;font-weight:700;overflow-wrap:anywhere;margin:2px 0 8px;white-space:pre-line}.note-reading{font-size:11px;color:var(--muted);margin:-3px 0 8px;white-space:pre-line;overflow-wrap:anywhere}.note-meaning{font-size:12px;color:var(--muted);line-height:1.6;white-space:pre-line;overflow-wrap:anywhere}.note-bottom{border-top:1px solid var(--stroke);margin-top:13px;padding-top:11px;display:flex;align-items:center;justify-content:space-between;gap:8px}.mini-action{background:transparent;border:0;color:var(--muted);display:inline-flex;align-items:center;gap:6px;font-size:11px;font-weight:750;padding:0 3px}.mini-action.is-favorite{color:#c77b3f}.empty{padding:42px 20px;text-align:center;background:white;border-radius:20px;border:1px solid var(--stroke)}.empty-icon{font-size:36px;margin-bottom:8px}.empty h3{font-size:17px;margin:3px 0 6px}.empty p{font-size:12px;color:var(--muted);line-height:1.7;margin:0 0 20px}.btn{border:0;display:inline-flex;align-items:center;justify-content:center;gap:7px;background:var(--mint);color:white;padding:12px 17px;border-radius:13px;font-size:13px;font-weight:770}.btn.secondary{background:var(--mint-soft);color:var(--mint)}.btn.light{background:white;color:var(--mint)}.btn.outline{border:1px solid var(--stroke);background:white;color:var(--ink)}.btn.full{width:100%}.search{display:flex;align-items:center;gap:10px;background:white;border:1px solid var(--stroke);border-radius:15px;padding:0 15px;height:49px;margin:15px 0 14px}.search svg{color:#81948a;width:19px;height:19px}.search input{border:0;background:transparent;outline:0;width:100%;color:var(--ink);font-size:13px}.search input::placeholder{color:#9ba8a1}.filters{display:flex;gap:8px;overflow:auto;padding:4px 0 12px;scrollbar-width:none}.filters::-webkit-scrollbar{display:none}.chip{border:1px solid var(--stroke);background:white;border-radius:11px;padding:8px 12px;font-size:11px;font-weight:710;color:var(--muted);white-space:nowrap}.chip.active{border-color:var(--mint);color:white;background:var(--mint)}.count-line{font-size:11px;color:var(--muted);margin:5px 1px 12px}.navbar{height:calc(var(--tab-h) + env(safe-area-inset-bottom));padding:10px 14px calc(9px + env(safe-area-inset-bottom));position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:min(480px,100%);display:grid;grid-template-columns:repeat(4,1fr);gap:5px;z-index:10;background:#fffffff2;backdrop-filter:blur(22px);border-top:1px solid #e9eee8}.tab{border:0;background:transparent;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:3px;color:#8c9b91;font-size:10px;font-weight:740;border-radius:13px}.tab.active{color:var(--mint);background:var(--mint-soft)}.tab svg{height:21px;width:21px}.badge-count{border-radius:9px;background:#f1f2ef;color:#6d8277;padding:3px 7px;font-size:10px;font-weight:760}.review-panel{border:1px solid var(--stroke);background:white;border-radius:23px;padding:22px 19px;box-shadow:var(--shadow)}.study-progress{display:flex;justify-content:space-between;color:var(--muted);font-size:11px;margin-bottom:14px}.progressbar{height:7px;background:#edf1ed;border-radius:9px;overflow:hidden;margin-bottom:24px}.progressbar span{display:block;height:100%;background:var(--mint);border-radius:9px;transition:width .2s}.study-card{background:#f4f6f1;border:1px solid #e8ece5;border-radius:20px;min-height:245px;padding:24px 18px;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center}.study-card .face{font-size:11px;color:var(--mint);font-weight:800;letter-spacing:.1em;margin-bottom:13px}.study-card h2{font-size:21px;line-height:1.58;letter-spacing:-.03em;margin:0;font-weight:830;white-space:pre-line;overflow-wrap:anywhere}.study-card .tip{font-size:11px;color:var(--muted);margin-top:17px;line-height:1.6}.study-answers{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:14px}.study-answers button{border:0;border-radius:13px;padding:11px 9px;font-weight:800;color:var(--ink);background:#eff1ed;font-size:12px}.study-answers button.again{background:#fde8e2;color:#a64c3c}.study-answers button.hard{background:#fff1d7;color:#9d6a25}.study-answers button.good{background:#dbefe5;color:#246c55}.study-answers button.easy{background:#e9eafc;color:#575bb2}.small-note{font-size:11px;color:var(--muted);line-height:1.65;margin-top:12px}.detail-cover{background:#e6f2e9;padding:25px 25px 23px;border-radius:23px;margin:2px 0 16px}.detail-cover .small{font-size:10px;color:var(--mint);font-weight:800;letter-spacing:.09em}.detail-cover h2{font-size:22px;line-height:1.55;letter-spacing:-.04em;margin:12px 0 8px;overflow-wrap:anywhere;white-space:pre-line}.detail-cover p{font-size:12px;color:#648679;line-height:1.6;white-space:pre-line;overflow-wrap:anywhere}.detail-section{padding:13px 3px;border-bottom:1px solid var(--stroke)}.detail-section:last-of-type{border:0}.detail-label{font-size:11px;color:var(--muted);font-weight:750;margin-bottom:5px}.detail-value{font-size:14px;line-height:1.8;white-space:pre-line;overflow-wrap:anywhere}.detail-value.grammar{font-size:13px}.source-note{font-size:11px;color:#a28660;background:#fff5e6;padding:10px;border-radius:9px;margin-top:13px}.modal-backdrop{position:fixed;inset:0;background:#1a322c80;z-index:20;display:flex;align-items:end;justify-content:center;animation:appear .18s ease}@keyframes appear{from{opacity:0}to{opacity:1}}.sheet{width:min(480px,100%);max-height:92dvh;background:var(--bg);border-radius:26px 26px 0 0;padding:16px 21px calc(22px + env(safe-area-inset-bottom));overflow:auto;box-shadow:0 -10px 30px #0002}.sheet-bar{width:39px;height:5px;background:#cdd8ce;border-radius:6px;margin:0 auto 16px}.sheet-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.sheet-top h2{font-size:18px;margin:0}.sheet-x{border:1px solid var(--stroke);border-radius:10px;background:white;width:32px;height:32px;display:grid;place-items:center}.sheet-x svg{width:17px;height:17px}.sheet-buttons{display:flex;gap:10px;margin-top:16px}.sheet-buttons .btn{flex:1}.settings-title{font-weight:810;font-size:16px;margin:7px 0}.info-panel{border:1px solid var(--stroke);padding:14px;border-radius:16px;background:white;margin-bottom:13px}.info-panel h3{margin:0 0 7px;font-size:14px}.info-panel p{margin:0;font-size:12px;color:var(--muted);line-height:1.7}.info-panel .btn{margin-top:13px}.form-field{display:flex;flex-direction:column;gap:5px;margin:10px 0;font-size:12px;font-weight:750}.form-field input,.form-field textarea,.form-field select{padding:10px 12px;border:1px solid var(--stroke);border-radius:10px;background:white;font-size:14px;color:var(--ink);outline-color:var(--mint)}.form-field textarea{min-height:75px;resize:vertical}.toast{position:fixed;left:50%;bottom:calc(90px + env(safe-area-inset-bottom));transform:translateX(-50%) translateY(20px);background:#243f36;color:white;border-radius:13px;padding:11px 16px;min-width:210px;max-width:90vw;font-size:12px;text-align:center;font-weight:730;opacity:0;pointer-events:none;z-index:50;transition:.2s;box-shadow:0 8px 20px #0002}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}.setup{margin-top:15px;background:white;padding:22px;border:1px solid var(--stroke);border-radius:22px}.setup h2{font-size:19px;margin:5px 0}.setup p{font-size:12px;color:var(--muted);line-height:1.75}.setup .box{display:flex;gap:12px;align-items:center;padding:12px;border:1px solid var(--stroke);border-radius:12px;margin-bottom:12px}.setup .box b{font-size:12px}.setup .box span{display:block;font-size:11px;color:var(--muted)}.detail-actions{display:flex;gap:7px;align-items:center}.detail-actions .icon-btn{height:33px;width:33px;border-radius:10px}.big-symbol{font-size:40px}.inline-muted{color:var(--muted);font-size:12px}.privacy-note{background:#fff4e6;border-radius:13px;padding:12px;font-size:11px;color:#906b40;line-height:1.65}.foot{color:#98a69d;font-size:10px;text-align:center;padding:10px}.hidden{display:none!important}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
/* Keep prominent action label horizontal on narrow iPhone viewports. */
.spotlight button{display:inline-flex;width:max-content;max-width:100%;white-space:nowrap;flex-wrap:nowrap;align-items:center}
.spotlight button svg{width:19px;height:19px;flex:0 0 19px}