:root{--ink:#1a2937;--muted:#677b88;--accent:#116f76;--accent-dark:#0b5259;--accentsoft:#e8f6f4;--bg:#f3f6f5;--line:#e3e9eb;--paper:#fff;--warn:#a85c2d;font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:var(--bg)}body{padding-bottom:calc(84px + env(safe-area-inset-bottom,0px))}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{opacity:.46;cursor:default}.hidden{display:none!important}a{color:var(--accent)}.topbar{height:72px;display:flex;justify-content:space-between;align-items:center;padding:10px max(18px,calc((100vw - 1020px)/2));background:#fff;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px}.brandmark{height:43px;width:43px;border-radius:13px;background:#135f68;color:white;display:grid;place-items:center;font-size:18px;font-weight:800;letter-spacing:-2px}.brandmark span{color:#93e9d1}.brand strong{display:block;letter-spacing:.11em;font-size:13px}.brand small{display:block;color:var(--muted);font-size:10px;margin-top:3px}.status{font-size:11px;color:var(--accent);background:var(--accentsoft);padding:7px 10px;border-radius:20px}.screen{max-width:950px;padding:22px 18px 22px;margin:0 auto}.head-row{display:flex;justify-content:space-between;align-items:end;gap:8px;margin-bottom:17px}.eyebrow{color:var(--accent);font-weight:800;font-size:10px;letter-spacing:.12em}.head-row h1{font-size:25px;line-height:1.2;letter-spacing:-.02em;margin:6px 0 0}.mini-pill{color:var(--accent);background:var(--accentsoft);font-size:11px;padding:8px 10px;border-radius:20px;white-space:nowrap}.card{border:1px solid var(--line);background:var(--paper);border-radius:17px;padding:18px;margin-bottom:13px;box-shadow:0 3px 16px #18344507}.card h2{font-size:20px;margin:8px 0 10px;letter-spacing:-.015em}.card h3{font-size:15px;margin:22px 0 7px}.card p{font-size:13px;line-height:1.8;color:var(--muted)}.hero{padding:34px 8px 25px}.hero-mark{font-size:40px;margin-bottom:14px}.hero h1{font-size:37px;line-height:1.18;letter-spacing:-.03em;margin:10px 0}.hero p{line-height:1.85;color:var(--muted);max-width:490px;font-size:15px}.primary,.secondary,.soft{border:0;border-radius:12px;font-weight:700;min-height:45px;padding:10px 16px;display:inline-flex;gap:8px;justify-content:center;align-items:center}.primary{background:var(--accent);color:white}.primary:hover{background:var(--accent-dark)}.secondary{background:var(--accentsoft);color:var(--accent-dark)}.soft{background:#f3f6f8;color:#4b6573}.full{width:100%;margin:7px 0}.large{height:54px}.filebtn{cursor:pointer;text-align:center}.filebtn span{font-size:20px}.tiny-card{font-size:12px}.tiny-card strong{font-size:13px}.warning{color:#b63c35!important}.import-progress{margin-top:13px}.import-bar{height:7px;border-radius:10px;background:#e7eded;overflow:hidden}.import-bar i{display:block;height:100%;background:var(--accent);width:0;transition:width .2s}.import-progress p{margin:5px 0}.row-between{display:flex;align-items:center;justify-content:space-between;gap:12px}.two-selects{display:grid;grid-template-columns:1fr 1fr;gap:10px}.two-selects label,.fieldlabel{display:block;color:var(--muted);font-size:11px;font-weight:700}.two-selects select,.fieldlabel select,.fieldlabel input{display:block;width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);margin-top:7px;font-size:14px}.counter{display:flex;justify-content:space-between;margin-top:12px;font-size:12px;color:var(--muted)}.quality{background:#fff6e9;color:#a3682a;font-size:11px;padding:5px 8px;border-radius:9px}.quality.aligned{color:var(--accent-dark);background:var(--accentsoft)}.player-buttons{display:flex;align-items:center;gap:8px;margin-top:17px}.player-buttons .soft{padding:10px 10px;font-size:12px;flex:1}.round-play{height:56px;width:56px;border:0;flex:0 0 56px;border-radius:17px;background:var(--accent);color:white;font-size:21px}.helper{font-size:12px;color:var(--muted);line-height:1.75;margin:10px 0 0}.tiny{font-size:12px;color:var(--muted)}.tiny select{border:1px solid var(--line);border-radius:7px;padding:4px;background:white}.write-card textarea{display:block;resize:vertical;border:1.5px solid #d9e4e7;background:#fafdfe;border-radius:12px;width:100%;margin-top:13px;line-height:1.7;padding:13px;font-size:16px;min-height:135px;color:var(--ink)}.write-card textarea:focus{outline:none;border-color:var(--accent)}.under{display:block;background:none;border:0;color:var(--muted);font-size:12px;margin:9px auto 0;text-decoration:underline}.reveal-card{border-color:#bbdcd7}.original{font-size:18px;font-weight:700;line-height:1.8;margin-top:13px;overflow-wrap:anywhere}.original .ok{color:var(--accent)}.original .wrong{background:#fff0e5;color:#9b4926;border-radius:4px}.original button.word{display:inline;background:none;border:0;padding:2px 1px;font-size:inherit;font-weight:inherit;color:inherit;line-height:inherit}.ipa{background:#f0faf8;color:#0d7177;border-radius:9px;margin-top:12px;padding:12px 14px;font-size:14px;line-height:1.8;overflow-wrap:anywhere}.translation{color:#4c5868;font-size:14px;margin-top:11px;line-height:1.7}.translation.missing{color:#a46b38;font-size:12px}.grammar-box{border-top:1px solid var(--line);margin-top:17px;padding-top:13px}.grammar-box strong{font-size:13px}.gramline{border-left:3px solid #9bd7ca;margin-top:10px;padding:3px 0 4px 10px;font-size:13px;line-height:1.75}.gramline b{display:block;color:var(--accent-dark)}.wordTip{font-size:11px;color:#85959b;margin-top:15px}.navpair{display:grid;grid-template-columns:1fr 1.3fr 1fr;gap:8px}.navpair button{font-size:12px;padding:9px 5px}.fieldlabel{margin:16px 0}.grammar-explanation{background:var(--accentsoft);color:#245a60;padding:12px;border-radius:10px;font-size:13px;line-height:1.8}.grammar-item{margin-bottom:10px}.grammar-item .src{font-size:11px;color:var(--muted);font-weight:700}.grammar-item .original{font-weight:600;font-size:15px;margin:8px 0}.grammar-item .ipa{font-size:12px;margin:8px 0}.grammar-item .translation{font-size:12px}.grammar-item .tags{font-size:11px;color:#7b5d36;background:#fcf5e6;display:inline-block;padding:4px 7px;border-radius:6px;margin-top:6px}.grammar-item button{font-size:12px;margin:9px 0 0}.review-item{border-bottom:1px solid var(--line);padding:14px 0}.review-item p{color:var(--ink)}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:15px 0}.stats div{border-radius:12px;background:#f0f6f5;padding:13px;text-align:center}.stats strong{font-size:25px;display:block}.stats small{font-size:11px;color:var(--muted)}.bottomnav{position:fixed;z-index:50;bottom:0;left:0;right:0;height:calc(69px + env(safe-area-inset-bottom,0px));padding:2px 14px env(safe-area-inset-bottom,0px);display:flex;justify-content:space-around;background:#fff;box-shadow:0 -4px 20px #19323c15;border-top:1px solid var(--line)}.bottomnav button{background:none;border:0;flex:1;color:#788b93;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:11px}.bottomnav button span{font-size:21px}.bottomnav button.active{color:var(--accent);font-weight:800}.pop{position:fixed;z-index:100;inset:0;background:#102c3599;display:flex;align-items:end;justify-content:center}.pop-card{background:#fff;border-radius:22px 22px 0 0;padding:25px;min-height:190px;width:100%;max-width:540px;position:relative;display:flex;flex-direction:column;gap:14px}.pop-card strong{font-size:28px}.pop-card span{color:var(--accent);font-size:15px}.pop-x{position:absolute;right:15px;top:12px;font-size:25px;background:none;border:0;color:var(--muted)}#toast{z-index:99;position:fixed;bottom:90px;left:50%;transform:translateX(-50%);background:#213b44;color:#fff;border-radius:14px;padding:11px 16px;box-shadow:0 7px 20px #0003;opacity:0;pointer-events:none;transition:opacity .2s;font-size:12px;max-width:calc(100vw - 32px);text-align:center}#toast.show{opacity:1}code{background:#edf3f3;padding:2px 5px;border-radius:4px;word-break:break-word}.badge{display:inline-block;padding:3px 8px;color:var(--accent);background:var(--accentsoft);border-radius:20px;font-size:11px}.no-data{padding:18px;color:var(--muted);font-size:13px}.import-card{max-width:570px}@media(min-width:800px){.screen{padding-top:36px}.topbar{height:84px}.head-row h1{font-size:32px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}.hero h1{font-size:50px}.bottomnav{width:460px;margin:auto;border-radius:15px 15px 0 0}.card{padding:24px}.player-buttons .soft{font-size:13px}}@media(max-width:380px){.screen{padding:16px 12px}.topbar{padding:10px 12px}.status{display:none}.card{padding:15px}.navpair{gap:5px}.navpair button{font-size:11px}.player-buttons .soft{padding:7px 6px;font-size:11px}}

/* IELTS ATLAS V5 · spaced retrieval */
.memory-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin:16px 0}.memory-stats>div{background:#edf7f4;border-radius:12px;text-align:center;padding:14px 5px}.memory-stats strong{display:block;font-size:25px;color:#155f66;font-variant-numeric:tabular-nums}.memory-stats small{font-size:11px;color:var(--muted)}.memory-progress{display:flex;justify-content:space-between;color:#647780;font-size:11px;gap:9px}.memory-track{height:7px;border-radius:10px;background:linear-gradient(to right,#168477 var(--fill,0%),#e8eaea var(--fill,0%));margin:9px 0 17px}.memory-prompt{background:#f7fbfa;border:1px solid #e0eeeb;padding:16px;border-radius:13px;line-height:1.75;margin:14px 0}.memory-locked{font-size:14px;color:#627881}.memory-typed{width:100%;resize:vertical;border:1px solid #cddedc;border-radius:12px;min-height:115px;padding:12px;font-size:15px}.memory-answer{border-top:1px solid var(--line);padding-top:13px;margin-top:15px}.memory-grammar-explain{border-left:3px solid #a2cfc5;margin:14px 0;padding-left:13px;color:#38575b;line-height:1.8;font-size:13px}.memory-grammar-explain p{margin:9px 0}.memory-help{font-size:12px!important;color:var(--muted)}.memory-ratings{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px}.memory-ratings button{border:1px solid #dce7e5;background:#f0f7f5;border-radius:10px;min-height:63px;padding:5px 2px;color:#145961}.memory-ratings button.memory-again{color:#9b453f;background:#fff2ef;border-color:#f2cfc8}.memory-ratings button b{display:block;font-size:12px}.memory-ratings button small{display:block;font-size:10px;margin-top:5px}.memory-upcoming{display:flex;align-items:center;gap:10px;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line);font-size:12px}.memory-upcoming span{color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0}.memory-upcoming b{font-size:11px;color:var(--accent);flex:0 0 auto}.memory-list-card h3{margin-top:8px}.grammar-memory{margin-left:8px}@media(max-width:420px){.bottomnav button{font-size:10px}.bottomnav button span{font-size:20px}.memory-ratings{grid-template-columns:repeat(2,1fr)}.grammar-memory{margin-left:0}.memory-stats strong{font-size:22px}}

/* IELTS ATLAS V6: handwritten grammar recall + book fragments */
.memory-peek-content{background:#fff6e9;border:1px solid #f0dcba;border-radius:12px;padding:16px;font-size:16px;line-height:1.8;font-weight:700;color:#473d35;margin:9px 0}.grammar-cue{margin-top:10px;color:#65787e;font-size:12px;line-height:1.6}.comparison{margin-top:10px;font-weight:650;line-height:2;background:#f8fbfa;padding:12px;border-radius:12px;overflow-wrap:anywhere}.comparison .word{font-weight:700}.comparison .wrong{background:#ffe5d5!important;color:#a13d28!important;padding:2px 3px!important;border-radius:4px}.comparison .ok{color:#117a73!important}.compare-extra{font-size:12px;color:#a55f35;margin:9px 0}.memory-score{background:#e9f7f2;padding:12px;border-radius:9px;font-size:13px;color:#146a5e;font-weight:600;line-height:1.6}.book-link{display:block;border:0;background:transparent;margin:10px auto;color:#0f6d75;text-decoration:underline;font-size:12px;padding:6px}.shard-float{z-index:110;position:fixed;left:50%;top:20%;transform:translateX(-50%);background:linear-gradient(115deg,#fff6df,#fbe1aa);color:#795016;border:1px solid #e9ba62;border-radius:15px;padding:15px 20px;box-shadow:0 12px 40px #a4774140;font-size:14px;font-weight:800;white-space:nowrap;pointer-events:none}.shard-pop{animation:shardpop .52s cubic-bezier(.2,1.2,.3,1) both}@keyframes shardpop{from{opacity:0;transform:translate(-50%,-10px) scale(.7) rotate(-7deg)}to{opacity:1;transform:translate(-50%,0) scale(1) rotate(0)}}
.book-intro h2{margin-top:10px}.book-main{display:grid;grid-template-columns:minmax(200px,1fr) minmax(240px,1fr);gap:26px;align-items:center;margin-top:20px}.book-cover-wrap{display:flex;justify-content:center}.book-cover{width:min(100%,300px);aspect-ratio:0.72;position:relative;background:linear-gradient(153deg,#12375f 0%,#0b1c36 41%,#191642 79%,#0b1d3d 100%);color:white;border-radius:5px 12px 12px 5px;border-left:12px solid #11243d;box-shadow:12px 13px 24px #13294435, inset 0 0 32px #061329c2;overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;padding:17px 10px 18px 19px;isolation:isolate}.book-cover:after{content:'';pointer-events:none;position:absolute;top:0;bottom:0;left:0;width:13px;background:linear-gradient(90deg,#efc98035,transparent)}.book-brand{font-size:9px;letter-spacing:.18em;color:#ddc18e;font-weight:800}.book-center{position:relative;text-align:center;margin-top:-18px}.book-super{font-size:8px;letter-spacing:.12em;color:#e2d3c7}.book-ielts{font-size:62px;font-weight:900;letter-spacing:-.05em;line-height:1.2;color:#f1ddbe}.book-four{font-size:125px;line-height:.88;font-weight:900;letter-spacing:-.08em;background:linear-gradient(120deg,#f7b547,#efd19d);color:transparent;background-clip:text}.book-caption{font-size:10px;letter-spacing:.1em;color:#ded3b9;margin-top:14px}.book-bottom{font-size:8px;letter-spacing:.12em;font-weight:700;color:#f2d9b4}.book-bottom span{float:right}.book-cover canvas{position:absolute;inset:0;width:100%;height:100%;z-index:3;pointer-events:none}.book-cover.assembled{box-shadow:0 10px 46px #d6a65570,12px 13px 25px #13294435}.book-victory{z-index:4;position:absolute;bottom:44px;left:8%;width:84%;padding:10px;text-align:center;border-radius:10px;background:#fff4c9;color:#745419;font-weight:900;font-size:14px}.book-kicker{font-size:12px;color:var(--muted);display:block}.book-total{display:block;font-size:38px;letter-spacing:-.035em;margin:8px 0;font-variant-numeric:tabular-nums}.book-percent{font-size:13px;color:var(--accent)}.book-progress-track{height:9px;background:#e5eeec;border-radius:20px;overflow:hidden;margin:13px 0 21px}.book-progress-track i{display:block;height:100%;width:0;background:linear-gradient(90deg,#318b7e,#e2bb78);transition:width .4s}.book-stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}.book-stat-grid div{background:#f5f7f6;border:1px solid var(--line);padding:13px 10px;border-radius:11px}.book-stat-grid span{color:#6b7d80;font-size:11px;display:block}.book-stat-grid b{font-size:16px;margin-top:6px;display:block;white-space:nowrap}.book-last-award{padding:14px 0;font-size:12px;color:#758884}.shard-recent{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:9px;margin-top:17px}.shard-piece{min-height:43px;display:flex;justify-content:center;align-items:center;flex-direction:column;background:linear-gradient(145deg,#b9e7dd,#72b6b0);color:#145852;clip-path:polygon(50% 0,95% 22%,84% 93%,23% 100%,0 40%);box-shadow:0 3px 4px #0001}.shard-piece.shard-grammar{background:linear-gradient(135deg,#fff0c5,#eeb972);color:#775720}.shard-piece b{font-size:14px;line-height:1}.shard-piece small{font-size:9px}.book-section-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:16px}.book-section-card{border:1px solid var(--line);padding:12px;border-radius:12px;background:#fbfdfc}.book-section-card .row-between{font-size:12px}.book-section-card .row-between span{color:var(--muted);font-size:10px}.book-mini-track{height:5px;background:#e6eaea;border-radius:8px;overflow:hidden;margin:10px 0 6px}.book-mini-track i{display:block;height:100%;background:#3b948a}.book-mini-caption{font-size:10px;color:var(--muted)}.book-open-section{border:0;background:transparent;padding:9px 0 0;color:var(--accent);font-size:11px;font-weight:750}
@media(max-width:630px){.book-main{grid-template-columns:1fr;gap:20px}.book-cover{width:min(100%,270px)}.book-info{width:100%}.book-total{font-size:31px}.book-section-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.shard-recent{gap:5px}.shard-piece{min-height:35px}.bottomnav{padding-left:2px;padding-right:2px}.bottomnav button{min-width:0;font-size:9px}.bottomnav button span{font-size:19px}}
@media(prefers-reduced-motion:reduce){.shard-pop{animation:none}}

/* Focused quiz does not bury the test below the dashboard */
#memoryView.quiz-active .memory-dashboard,#memoryView.quiz-active .memory-list-card,#memoryView.quiz-active>.tiny-card{display:none}
.comparison button.word{display:inline;background:transparent;border:0;box-shadow:none;font:inherit;line-height:inherit;margin:0;padding:1px 2px;color:inherit;cursor:pointer}
.shard-recent .no-data{grid-column:1/-1;white-space:normal}

/* V6.1: stronger unlocked/locked mosaic contrast and visible earned-piece indicators */
.book-cover{background:linear-gradient(155deg,#1a5277 0%,#132449 47%,#21194b 80%,#132e5b 100%);box-shadow:0 18px 30px rgba(9,36,65,.3), inset 0 0 22px rgba(173,224,250,.08)}
.book-cover.assembled{box-shadow:0 0 42px rgba(244,188,73,.66),0 20px 38px rgba(9,36,65,.35)}
.book-cover canvas{filter:saturate(1.15)}
.book-legend{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:12px 0 0;color:#46616a;font-size:11px;font-weight:650}
.book-legend span{display:inline-flex;align-items:center;gap:6px;background:#eff5f5;padding:5px 8px;border-radius:30px}
.book-legend i{display:inline-block;width:12px;height:12px;border-radius:3px;box-shadow:0 0 9px currentColor}
.book-legend .legend-listen{background:#35e4f3;color:#06a0ad}
.book-legend .legend-grammar{background:#ffcb4b;color:#bd8110}
.book-legend .legend-lock{background:#071024;color:#334a5a;box-shadow:none}
.shard-recent{grid-template-columns:repeat(6,minmax(0,1fr));gap:12px}
.shard-piece{min-height:58px;background:linear-gradient(138deg,#b4ffff 0%,#51e5e9 45%,#13a4c0 100%);color:#064c5e;filter:drop-shadow(0 3px 7px rgba(1,166,193,.36));outline:1px solid transparent}
.shard-piece.shard-grammar{background:linear-gradient(135deg,#fff5b2 0%,#ffd456 52%,#e89b21 100%);color:#6d4204;filter:drop-shadow(0 3px 8px rgba(233,167,32,.42))}
.shard-piece b{font-size:20px;text-shadow:0 1px 1px #ffffff9e}
.shard-piece small{font-size:10px;font-weight:900}
.book-last-award{color:#146e78;font-weight:750}
@media(max-width:630px){.shard-recent{gap:8px}.shard-piece{min-height:49px}.book-legend{font-size:10px}}

/* Keep the book full-size, with the high-contrast legend underneath (not beside it). */
.book-cover-wrap{flex-direction:column;align-items:center}
.book-cover{flex:0 0 auto}
.book-legend{width:100%}

/* V6.2: sentence quality and offline provenance, preserving V6.1 bright shards. */
.quality-details{display:flex;flex-wrap:wrap;gap:6px;margin:12px 0;font-size:11px;color:#647881}.quality-details span{padding:4px 7px;background:#f2f6f5;border-radius:6px}.sentence-explanation{font-size:13px;line-height:1.8;color:#38575b}.sentence-explanation p{color:inherit}.memory-answer{overflow-wrap:anywhere}