:root{--ink:#192521;--muted:#6c766f;--paper:#f5f1e8;--card:#fffdf8;--line:#ded8cb;--green:#315f51;--green2:#dce9e0;--gold:#d99445;--red:#bd5d50;--shadow:0 14px 38px rgba(36,48,40,.09);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 85% -10%,#e2ebdf 0,transparent 32%),var(--paper)}button,input{font:inherit}button{cursor:pointer}.shell{max-width:1100px;margin:auto;min-height:100vh;padding:0 24px 104px}.topbar{height:82px;display:flex;align-items:center;justify-content:space-between}.brand{border:0;background:none;display:flex;gap:10px;align-items:center;font-size:20px;font-weight:750;color:var(--ink)}.brand-mark{width:34px;height:34px;border-radius:50% 50% 45% 55%;display:grid;place-items:center;background:var(--green);color:white;font-family:Georgia,serif;font-size:19px}.day-chip{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:rgba(255,253,248,.65);padding:8px 13px;border-radius:99px;color:var(--muted);font-size:13px}.pulse{width:7px;height:7px;background:#6d9a78;border-radius:50%;box-shadow:0 0 0 4px #e1eee3}
.hero{display:grid;grid-template-columns:1.35fr .65fr;gap:22px;margin-top:14px}.hero-main{padding:42px;border-radius:30px;background:var(--green);color:#fff;position:relative;overflow:hidden;min-height:275px;box-shadow:var(--shadow)}.hero-main:after{content:"Aa";position:absolute;right:-5px;bottom:-45px;font:170px Georgia,serif;color:rgba(255,255,255,.065)}.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-size:12px;opacity:.72}.hero h1{font:clamp(34px,5vw,58px)/1.08 Georgia,"Songti SC",serif;margin:20px 0 14px;max-width:650px}.hero p{color:rgba(255,255,255,.74);margin:0 0 28px;max-width:520px}.primary,.secondary,.text-button{border:0;border-radius:13px;padding:13px 20px;font-weight:700}.primary{background:var(--gold);color:#24170a;box-shadow:0 7px 16px rgba(80,50,15,.16)}.primary:hover{filter:brightness(1.05)}.secondary{background:var(--green2);color:var(--green)}.text-button{background:transparent;color:var(--green);padding:8px}.hero-side{display:grid;grid-template-columns:1fr 1fr;gap:12px}.stat{background:rgba(255,253,248,.87);border:1px solid rgba(220,214,202,.8);border-radius:22px;padding:22px;min-height:130px;box-shadow:0 8px 28px rgba(50,55,45,.04)}.stat.featured{grid-column:span 2;background:#e9dcc6}.stat-value{font:38px Georgia,serif;margin:7px 0}.stat-label{font-size:13px;color:var(--muted)}
.section{margin-top:42px}.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:16px}.section-head h2,.page-title{font:30px Georgia,"Songti SC",serif;margin:0}.section-head p,.page-subtitle{color:var(--muted);margin:5px 0 0}.action-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.action-card{border:1px solid var(--line);background:var(--card);text-align:left;border-radius:20px;padding:24px;color:var(--ink);transition:.2s;min-height:145px}.action-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c6d2c9}.action-icon{font-size:22px;color:var(--green)}.action-card h3{margin:18px 0 5px}.action-card p{color:var(--muted);margin:0;font-size:14px;line-height:1.55}
.eyebrow.dark{color:var(--green);opacity:1}.volume-summary{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0}.volume-summary span{border:1px solid var(--line);background:rgba(255,253,248,.7);border-radius:99px;padding:9px 14px;color:var(--muted);font-size:13px}.volume-summary b{color:var(--ink)}.volume-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.volume-card{border:1px solid var(--line);background:var(--card);border-radius:24px;padding:27px;text-align:left;color:var(--ink);min-height:230px;transition:.2s}.volume-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#9eb7a6}.volume-card h2{font:32px Georgia,"Songti SC",serif;margin:22px 0 8px}.volume-card p{color:var(--muted);font-size:13px;line-height:1.6}.volume-number{font-size:11px;letter-spacing:.16em;color:var(--gold);font-weight:800}.volume-progress{height:7px;background:#e2ded4;border-radius:9px;overflow:hidden;margin:26px 0 10px}.volume-progress i{display:block;height:100%;background:var(--green)}.volume-foot{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.add-volume{display:grid;place-content:center;text-align:center;border-style:dashed;background:transparent}.add-volume .plus{font:42px/1 Georgia,serif;color:var(--green)}.add-volume h2{font-size:23px;margin:14px 0 0}.volume-top{display:flex;gap:22px;align-items:center;margin:16px 0 20px}.back-link{border:0;background:#e8e3d9;border-radius:99px;padding:9px 13px;color:var(--green)}.volume-nav{display:flex;gap:6px;border-bottom:1px solid var(--line);margin-bottom:25px;overflow-x:auto}.volume-nav button{border:0;background:transparent;color:var(--muted);padding:13px 16px;white-space:nowrap;border-bottom:2px solid transparent}.volume-nav button.active{color:var(--green);border-color:var(--green);font-weight:750}.volume-hero{display:grid;grid-template-columns:1fr auto;align-items:center;gap:30px;padding:38px 42px;border-radius:28px;background:var(--green);color:white}.volume-hero h2{font:clamp(30px,4vw,48px)/1.1 Georgia,"Songti SC",serif;margin:14px 0}.volume-hero p{color:rgba(255,255,255,.72);max-width:610px;line-height:1.7}.ring{width:150px;height:150px;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--gold) var(--p),rgba(255,255,255,.13) 0);position:relative}.ring:after{content:"";position:absolute;inset:12px;background:var(--green);border-radius:50%}.ring span{z-index:1;text-align:center;font-size:12px;color:rgba(255,255,255,.7)}.ring b{display:block;font:30px Georgia,serif;color:white}.volume-actions{margin-top:18px}.progress-hero{display:grid;grid-template-columns:1fr 1fr;align-items:end;gap:32px;background:#e9dcc6;border-radius:24px;padding:30px}.progress-hero h2{font:46px Georgia,serif;margin:10px 0}.progress.big{height:10px;margin:0 0 20px}.pending-cloud{display:flex;flex-wrap:wrap;gap:7px}.pending-cloud span{background:var(--card);border:1px solid var(--line);border-radius:99px;padding:7px 11px;color:var(--muted);font:14px Georgia,serif}.empty.small{padding:35px}.standalone{padding:0}.standalone .learned-word{background:var(--card)}
.bottom-nav{position:fixed;z-index:20;left:50%;bottom:16px;transform:translateX(-50%);display:flex;gap:4px;background:rgba(255,253,248,.92);backdrop-filter:blur(18px);border:1px solid var(--line);border-radius:20px;padding:7px;box-shadow:0 14px 40px rgba(30,40,34,.14)}.bottom-nav button{border:0;background:transparent;color:var(--muted);border-radius:14px;min-width:76px;padding:8px 12px;display:flex;gap:5px;flex-direction:column;align-items:center;font-size:11px}.bottom-nav button span{font-size:18px}.bottom-nav button.active{background:var(--green);color:white}
.page-head{display:flex;justify-content:space-between;align-items:end;margin:22px 0 24px}.progress{height:7px;background:#dfdacf;border-radius:9px;overflow:hidden;margin:18px 0}.progress>i{display:block;height:100%;background:var(--gold);transition:.3s}.study-wrap{max-width:760px;margin:0 auto}.study-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:13px}.flashcard{background:var(--card);border:1px solid var(--line);border-radius:28px;min-height:450px;padding:42px;box-shadow:var(--shadow);position:relative}.word-kicker{color:var(--muted);font-size:13px;letter-spacing:.1em;text-transform:uppercase}.big-word{font:clamp(48px,10vw,82px)/1 Georgia,serif;margin:18px 0 30px;word-break:break-word}.reveal-block{border-top:1px solid var(--line);padding-top:22px;margin-top:22px;animation:fade .25s ease}.reveal-label{font-size:12px;color:var(--green);font-weight:800;letter-spacing:.12em;text-transform:uppercase}.meaning{font-size:22px;line-height:1.6;margin:10px 0}.detail{white-space:pre-wrap;line-height:1.8;color:#465149;max-height:190px;overflow:auto;font-size:14px}.root-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:11px}.root-chip{border:1px solid #bed1c4;background:#eef5ef;color:var(--green);border-radius:99px;padding:7px 11px;font-size:13px}.study-actions{display:flex;justify-content:center;gap:10px;margin-top:20px;flex-wrap:wrap}.rating{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.rating button{border:1px solid var(--line);border-radius:12px;padding:12px 8px;background:#fff;color:var(--ink)}.rating button:hover{border-color:var(--green);color:var(--green)}
.learned-panel{margin-top:30px;border:1px solid var(--line);border-radius:20px;background:rgba(255,253,248,.72);overflow:hidden}.learned-panel summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 20px;cursor:pointer;color:var(--green)}.learned-panel summary::-webkit-details-marker{display:none}.learned-panel summary b{display:inline-grid;place-items:center;min-width:25px;height:25px;padding:0 7px;border-radius:99px;background:var(--green);color:#fff;font-size:12px}.learned-panel summary small{color:var(--muted);font-weight:400}.learned-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;padding:0 14px 14px}.learned-word{display:grid;grid-template-columns:minmax(90px,.7fr) 1.4fr auto;align-items:center;gap:10px;text-align:left;border:1px solid var(--line);background:#fff;border-radius:12px;padding:12px 13px;color:var(--ink)}.learned-word:hover{border-color:#8eae99}.learned-word strong{font:19px Georgia,serif}.learned-word span{color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.learned-word i{font-style:normal;color:var(--green);font-size:12px}.toolbar{display:flex;gap:10px;margin:20px 0}.search{flex:1;border:1px solid var(--line);background:var(--card);border-radius:14px;padding:13px 16px;outline:none}.search:focus{border-color:var(--green);box-shadow:0 0 0 3px #dbe8df}.filter{border:1px solid var(--line);border-radius:14px;padding:0 12px;background:var(--card)}.word-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.word-row{display:flex;justify-content:space-between;align-items:center;text-align:left;border:1px solid var(--line);background:var(--card);border-radius:16px;padding:17px 19px}.word-row:hover{border-color:#9eb7a6}.word-row h3{font:23px Georgia,serif;margin:0 0 5px}.word-row p{margin:0;color:var(--muted);font-size:13px;max-width:420px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.badge{border-radius:99px;padding:6px 9px;font-size:11px;background:#edf1eb;color:var(--green);white-space:nowrap}.badge.new{background:#efe4d4;color:#825727}.badge.mastered{background:#dfeadf;color:#3b704a}
.root-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.root-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;text-align:left;color:var(--ink)}.root-card-button{transition:.2s}.root-card-button:hover{transform:translateY(-2px);border-color:#9eb7a6}.root-card h3{font:25px Georgia,serif;margin:0}.root-card .kind{font-size:10px;text-transform:uppercase;letter-spacing:.12em;color:var(--gold)}.root-card>p{color:var(--muted);font-size:13px;line-height:1.6}.root-card>span{font-size:12px;color:var(--green)}.root-words{display:flex;gap:6px;flex-wrap:wrap}.root-words button{border:0;background:#edf2ed;color:var(--green);border-radius:8px;padding:5px 8px;font-size:12px}.empty{padding:70px 20px;text-align:center;color:var(--muted);border:1px dashed #c8c1b5;border-radius:22px}.empty b{display:block;color:var(--ink);font:26px Georgia,serif;margin-bottom:9px}.modal{position:fixed;z-index:50;inset:0;background:rgba(19,30,26,.42);display:grid;place-items:center;padding:20px}.modal-card{background:var(--card);width:min(700px,100%);max-height:88vh;overflow:auto;border-radius:24px;padding:32px;box-shadow:0 25px 80px rgba(0,0,0,.25)}.modal-close{float:right;border:0;background:#eee9df;border-radius:50%;width:34px;height:34px}.modal h2{font:46px Georgia,serif;margin:15px 0}.root-explanation{color:var(--muted);line-height:1.75;margin:0 0 24px}.root-modal-words{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:12px}.source{font-size:12px;color:var(--muted)}.toast{position:fixed;z-index:80;left:50%;bottom:100px;transform:translate(-50%,20px);background:#172720;color:white;padding:11px 18px;border-radius:99px;opacity:0;pointer-events:none;transition:.25s}.toast.show{opacity:1;transform:translate(-50%,0)}.loading{padding:80px;text-align:center;color:var(--muted)}@keyframes fade{from{opacity:0;transform:translateY(5px)}}
.progress-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:22px 0}.progress-stats>div{background:#e9dcc6;border-radius:18px;padding:20px}.progress-stats span,.progress-stats small{display:block;color:var(--muted);font-size:12px}.progress-stats b{display:inline-block;font:38px Georgia,serif;margin:8px 5px 4px 0}.manage-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.manage-card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:25px}.manage-card h2{font:24px Georgia,"Songti SC",serif;margin:16px 0 8px}.manage-card p{color:var(--muted);line-height:1.7;font-size:13px;min-height:67px}.manage-icon{width:42px;height:42px;border-radius:13px;background:var(--green2);color:var(--green);display:grid;place-items:center;font-size:24px}.button-link{display:inline-block;text-decoration:none}.danger-card{border-color:#dec2bb}.danger-card .manage-icon{background:#f3dfdc;color:var(--red)}.danger-button{border:1px solid #d8aca4;background:#fff5f3;color:#a84d42;border-radius:13px;padding:12px 17px;font-weight:700}.progress-note{margin-top:18px;border:1px dashed #bdb5a8;border-radius:16px;padding:16px;color:var(--muted);font-size:13px;line-height:1.7}.progress-note b{color:var(--ink)}
@media(max-width:760px){.shell{padding:0 15px 96px}.topbar{height:68px}.hero{grid-template-columns:1fr}.hero-main{padding:30px 25px;min-height:255px}.hero-side{grid-template-columns:repeat(3,1fr)}.stat,.stat.featured{grid-column:auto;min-height:110px;padding:16px}.stat-value{font-size:28px}.action-grid,.root-grid,.volume-grid,.manage-grid{grid-template-columns:1fr}.progress-stats{grid-template-columns:repeat(3,1fr)}.progress-stats>div{padding:14px}.progress-stats b{font-size:28px}.bottom-nav{width:calc(100% - 20px);bottom:8px;justify-content:space-around}.bottom-nav button{min-width:0;flex:1;padding:7px 3px}.word-list,.learned-grid,.root-modal-words{grid-template-columns:1fr}.flashcard{padding:27px 22px;min-height:420px}.rating{grid-template-columns:repeat(2,1fr)}.page-head{align-items:start;gap:12px}.toolbar{flex-direction:column}.filter{height:45px}.modal-card{padding:24px}.action-card{min-height:120px}.action-grid{gap:10px}.action-card h3{margin-top:12px}.learned-panel summary{align-items:flex-start;flex-direction:column}.learned-word{grid-template-columns:minmax(78px,.65fr) 1.4fr auto}.volume-hero{grid-template-columns:1fr;padding:28px 24px}.ring{width:120px;height:120px}.progress-hero{grid-template-columns:1fr}.volume-top{align-items:flex-start;flex-direction:column;gap:12px}.volume-nav{margin-left:-15px;margin-right:-15px;padding-left:8px}.volume-card{min-height:200px}.manage-card p{min-height:0}}

/* Mobile width guardrails. Long definitions and status chips must shrink inside
   the viewport instead of making the browser zoom the entire page out. */
html{max-width:100%;overflow-x:hidden;-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{max-width:100%;overflow-x:hidden}
.shell,#app,.page-head,.toolbar,.word-list,.word-row,.word-row>div{min-width:0}
.word-row{width:100%;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px}
.word-row h3{overflow-wrap:anywhere}
.word-row p{max-width:100%}
.badge{flex:0 0 auto}
.detail,.root-explanation,.source{overflow-wrap:anywhere}

@media(max-width:760px){
  .shell{width:100%;padding-left:max(12px,env(safe-area-inset-left));padding-right:max(12px,env(safe-area-inset-right));padding-bottom:calc(96px + env(safe-area-inset-bottom))}
  .word-list,.learned-grid,.root-modal-words,.action-grid,.root-grid,.volume-grid,.manage-grid{grid-template-columns:minmax(0,1fr)}
  .word-row{padding:14px 13px;gap:9px}
  .word-row h3{font-size:21px}
  .word-row p{font-size:12px}
  .search,.filter{box-sizing:border-box;width:100%;min-width:0;font-size:16px}
  .learned-word{grid-template-columns:minmax(0,.65fr) minmax(0,1.4fr) auto;width:100%;min-width:0}
  .bottom-nav{bottom:max(8px,env(safe-area-inset-bottom))}
  .modal{padding:12px}
  .modal-card{width:100%;min-width:0}
  .modal h2{font-size:clamp(34px,12vw,46px);overflow-wrap:anywhere}
}

@media(max-width:360px){
  .word-row{padding:12px 11px}
  .badge{padding:5px 7px;font-size:10px}
  .page-title{font-size:27px}
}

.top-actions{display:flex;align-items:center;gap:8px}
.install-button{border:1px solid #b8cbbd;background:#e7efe8;color:var(--green);border-radius:99px;padding:8px 13px;font-size:13px;font-weight:750}
.install-button[hidden]{display:none}
@media(max-width:430px){.install-button{padding:8px 10px;font-size:12px}.day-chip{padding:8px 10px}.day-chip .pulse{display:none}}