@font-face{font-family:EliasSans;src:local("Inter"),local("PingFang SC"),local("Microsoft YaHei")}
*{box-sizing:border-box}
html{color-scheme:light;scroll-behavior:smooth}
:root{
  --canvas:#f5f3ee;--canvas-2:#efede7;--paper:#fffefa;--paper-2:#faf8f3;
  --ink:#20201d;--ink-2:#3c3a35;--muted:#76736b;--faint:#a7a39a;
  --line:#e5e1d8;--line-strong:#d7d1c6;--accent:#df6845;--accent-deep:#bd4c2d;
  --accent-soft:#fbe9e2;--sage:#426d5d;--sage-soft:#e5eee9;--navy:#263e4b;
  --danger:#a94435;--danger-soft:#f8e7e3;--amber:#a9701c;--amber-soft:#f7edda;
  --shadow-xs:0 1px 2px rgba(35,31,24,.04);--shadow-sm:0 8px 24px rgba(35,31,24,.055);
  --shadow-md:0 20px 60px rgba(35,31,24,.09);--shadow-lg:0 34px 100px rgba(24,22,18,.18);
  --r-sm:10px;--r-md:15px;--r-lg:22px;--r-xl:30px;
  --sans:EliasSans,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --serif:Georgia,"Songti SC","Noto Serif SC",serif;
}
body{margin:0;background:var(--canvas);color:var(--ink);font-family:var(--sans);font-size:15px;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.52}
a{color:inherit;text-decoration:none}::selection{background:#f1c9ba;color:var(--ink)}
:focus-visible{outline:3px solid rgba(223,104,69,.24);outline-offset:2px}
::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#d8d3c9;border:3px solid transparent;background-clip:padding-box;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#bdb7ac;border:3px solid transparent;background-clip:padding-box}

/* Foundation */
.boot-screen{height:100vh;display:grid;place-content:center;gap:14px;text-align:center;color:var(--muted)}
.brand-mark{width:56px;height:56px;border-radius:18px;margin:auto;background:var(--ink);color:#fff;display:grid;place-items:center;font:30px var(--serif);box-shadow:var(--shadow-sm)}
.eyebrow{font-size:11px;line-height:1.2;letter-spacing:.18em;text-transform:uppercase;color:var(--accent-deep);font-weight:800}
.muted{color:var(--muted)}
.btn{min-height:42px;border:1px solid transparent;border-radius:12px;padding:10px 16px;font-weight:720;background:#eae7df;color:var(--ink);display:inline-flex;gap:8px;align-items:center;justify-content:center;transition:transform .18s ease,background .18s ease,border-color .18s ease,box-shadow .18s ease;white-space:nowrap}
.btn:hover:not(:disabled){transform:translateY(-1px);background:#e2ded5}.btn:active:not(:disabled){transform:translateY(0)}
.btn svg{width:17px;height:17px}.btn-primary{background:var(--ink);color:#fff;box-shadow:0 6px 16px rgba(32,32,29,.13)}
.btn-primary:hover:not(:disabled){background:#34332f;box-shadow:0 9px 22px rgba(32,32,29,.18)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 7px 18px rgba(223,104,69,.21)}.btn-accent:hover:not(:disabled){background:var(--accent-deep)}
.btn-ghost{background:transparent;border-color:transparent;color:var(--ink-2);box-shadow:none}.btn-ghost:hover:not(:disabled){background:rgba(40,38,33,.055)}
.btn-danger{color:var(--danger);background:var(--danger-soft)}.btn-wide{width:100%;padding:13px 18px}
.icon-btn{width:42px;height:42px;border:1px solid var(--line);background:rgba(255,255,255,.72);border-radius:12px;display:grid;place-items:center;transition:.18s ease;box-shadow:var(--shadow-xs)}
.icon-btn:hover{border-color:var(--line-strong);background:#fff;transform:translateY(-1px)}.icon-btn svg{width:18px;height:18px}

/* Authentication */
.auth-shell{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.18fr) minmax(420px,.82fr)}
.auth-story{position:relative;overflow:hidden;padding:clamp(48px,7vw,112px);display:flex;flex-direction:column;justify-content:space-between;background:#20201d;color:#fff;min-height:100vh}
.auth-story:after{content:"";position:absolute;width:720px;height:720px;right:-290px;bottom:-350px;border-radius:50%;border:1px solid rgba(255,255,255,.08);box-shadow:0 0 0 110px rgba(255,255,255,.022),0 0 0 220px rgba(255,255,255,.015)}
.auth-story .brand{font:700 30px var(--serif);letter-spacing:-.02em}.auth-story .eyebrow{color:#ef987c}
.auth-story h1{position:relative;z-index:1;font:500 clamp(46px,5.6vw,84px)/1.05 var(--serif);letter-spacing:-.045em;max-width:850px;margin:60px 0 24px}
.auth-story p{position:relative;z-index:1;max-width:640px;color:#c9c5bc;font-size:18px;line-height:1.85}.auth-story>small{color:#aaa69e}
.auth-panel{background:var(--paper);display:grid;place-items:center;padding:48px}
.auth-card{width:min(420px,100%)}.auth-card h2{font:600 35px/1.22 var(--serif);letter-spacing:-.025em;margin:13px 0 10px}.auth-card>p{line-height:1.7}
.field{display:grid;gap:8px;margin:20px 0}.field label{font-size:13px;font-weight:720;color:#555149}
.field input,.field textarea,.field select,.search-input{border:1px solid var(--line-strong);border-radius:12px;background:#fff;padding:13px 14px;outline:none;width:100%;transition:border-color .18s,box-shadow .18s,background .18s}
.field input:hover,.field textarea:hover,.field select:hover,.search-input:hover{border-color:#c4bdb1}
.field input:focus,.field textarea:focus,.field select:focus,.search-input:focus{border-color:#9e9689;box-shadow:0 0 0 4px rgba(65,103,88,.08);background:#fff}
.field textarea{min-height:120px;resize:vertical;line-height:1.65}

/* App chrome */
.app-shell{min-height:100vh;display:grid;grid-template-columns:258px minmax(0,1fr)}
.sidebar{position:fixed;inset:0 auto 0 0;width:258px;padding:27px 18px 20px;background:#ece9e2;border-right:1px solid rgba(126,118,104,.13);display:flex;flex-direction:column;z-index:20}
.sidebar-brand{display:flex;align-items:center;gap:12px;padding:0 10px 28px}.sidebar-brand .brand-mark{width:40px;height:40px;border-radius:12px;margin:0;font-size:21px;box-shadow:none}
.sidebar-brand strong{font:700 21px var(--serif);letter-spacing:-.02em}.sidebar-brand small{display:block;color:var(--muted);font-size:9px;margin-top:3px;letter-spacing:.13em;font-weight:750}
.nav{display:grid;gap:5px}.nav button{position:relative;min-height:46px;border:0;background:transparent;border-radius:13px;padding:11px 13px;text-align:left;color:#68645d;display:flex;align-items:center;gap:12px;font-weight:680;transition:.18s ease}
.nav button:before{content:"";position:absolute;left:-18px;width:3px;height:20px;border-radius:0 4px 4px 0;background:transparent}
.nav button svg{width:19px;height:19px;transition:transform .18s}.nav button:hover{background:rgba(255,255,255,.58);color:var(--ink)}.nav button:hover svg{transform:scale(1.06)}
.nav button.active{background:rgba(255,255,255,.86);color:var(--ink);box-shadow:var(--shadow-xs)}.nav button.active:before{background:var(--accent)}
.nav-badge{margin-left:auto;background:var(--accent);color:#fff;border-radius:20px;font-size:10px;padding:3px 7px;min-width:22px;text-align:center}
.sidebar-foot{margin-top:auto}.daily-note{position:relative;overflow:hidden;background:rgba(255,254,250,.82);border:1px solid rgba(216,209,197,.85);border-radius:15px;padding:15px;margin-bottom:14px}
.daily-note:after{content:"";position:absolute;width:55px;height:55px;right:-19px;top:-19px;background:var(--accent-soft);border-radius:50%}.daily-note small{position:relative;z-index:1;color:var(--muted)}.daily-note strong{position:relative;z-index:1;display:block;font:600 24px var(--serif);margin:4px 0}
.user-menu{width:100%;justify-content:flex-start;padding:9px 10px}.avatar{width:36px;height:36px;border-radius:50%;background:var(--sage);color:#fff;display:grid;place-items:center;font-weight:800;box-shadow:inset 0 0 0 1px rgba(255,255,255,.16)}
.main-shell{grid-column:2;min-width:0}.topbar{height:74px;padding:0 clamp(24px,4vw,62px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(126,118,104,.12);background:rgba(245,243,238,.86);backdrop-filter:blur(18px);position:sticky;top:0;z-index:15}
.topbar-title{font-size:14px;font-weight:780;letter-spacing:.02em}.topbar-actions{display:flex;gap:9px;align-items:center}.topbar-actions .btn{min-height:42px}
.page{padding:clamp(34px,4.5vw,68px) clamp(24px,5vw,78px) 96px;max-width:1540px;margin:auto;animation:pageIn .32s ease both}
@keyframes pageIn{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:34px}.page-head h1{font:600 clamp(37px,4vw,54px)/1.08 var(--serif);letter-spacing:-.04em;margin:8px 0 10px}.page-head p{color:var(--muted);font-size:15px;line-height:1.65;margin:0}.page-head>.btn{margin-bottom:4px}

/* Dashboard and shared panels */
.grid{display:grid;gap:18px}.metrics{grid-template-columns:repeat(4,1fr)}
.metric{position:relative;overflow:hidden;background:rgba(255,254,250,.88);border:1px solid var(--line);padding:21px 22px;border-radius:var(--r-lg);min-height:148px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:var(--shadow-xs);transition:.22s ease}
.metric:after{content:"";position:absolute;width:76px;height:76px;right:-34px;top:-34px;border-radius:50%;background:var(--accent-soft);opacity:0;transition:.22s}.metric:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm);border-color:#ddd6cb}.metric:hover:after{opacity:1}
.metric span{color:var(--muted);font-size:12px;font-weight:700}.metric strong{font:600 40px var(--serif);letter-spacing:-.03em}.metric strong small{font:500 18px var(--sans);color:var(--muted)}.metric em{font-style:normal;font-size:11px;color:var(--sage)}
.split{grid-template-columns:minmax(0,1.5fr) minmax(310px,.7fr);margin-top:18px}
.panel{background:rgba(255,254,250,.88);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow-xs)}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:20px}.panel h2,.panel-head h2{font:600 21px var(--serif);letter-spacing:-.015em;margin:0}
.continue-list,.activity-list{display:grid;gap:8px}.continue-item{display:grid;grid-template-columns:50px 1fr auto;gap:14px;align-items:center;padding:12px;border-radius:14px;transition:.18s}
.continue-item:hover{background:#f3f0e9}.book-mini{width:43px;height:56px;border-radius:4px 9px 9px 4px;background:linear-gradient(145deg,var(--navy),#486474);color:#fff;display:grid;place-items:center;font:700 18px var(--serif);box-shadow:4px 5px 11px #d6d1c7}
.continue-item strong{display:block;margin-bottom:4px}.continue-item small{color:var(--muted)}
.progress{height:5px;border-radius:10px;background:#e5e1d9;overflow:hidden;margin-top:9px}.progress i{display:block;height:100%;background:linear-gradient(90deg,var(--sage),#6d9586);border-radius:10px;transition:width .35s ease}
.empty{padding:50px 22px;text-align:center;color:var(--muted);border:1px dashed #d9d3c8;border-radius:15px;background:rgba(250,248,243,.38);line-height:1.7}
.chart{height:190px;display:flex;align-items:flex-end;gap:8px;padding-top:20px}.bar-col{height:100%;flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:7px;color:var(--muted);font-size:9px}.bar{width:100%;max-width:26px;background:#efdfd8;border-radius:6px 6px 3px 3px;min-height:4px;transition:.2s}.bar:hover{background:#e3a992}.bar.today{background:var(--accent)}

/* Library */
.library-grid{grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:22px}.book-card{background:rgba(255,254,250,.92);border:1px solid var(--line);border-radius:var(--r-lg);padding:16px;transition:transform .22s ease,box-shadow .22s ease,border-color .22s;cursor:pointer}
.book-card:hover{transform:translateY(-5px);border-color:#d5cfc3;box-shadow:var(--shadow-md)}
.book-cover{position:relative;overflow:hidden;height:270px;border-radius:9px 19px 19px 9px;background:linear-gradient(145deg,var(--navy),#4e6f7f);color:#fff;padding:23px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:8px 11px 21px #d8d3c9}
.book-cover:before{content:"";position:absolute;inset:0 auto 0 0;width:8px;background:rgba(0,0,0,.13);box-shadow:4px 0 9px rgba(0,0,0,.12)}.book-cover:after{content:"";position:absolute;width:170px;height:170px;border:1px solid rgba(255,255,255,.12);border-radius:50%;right:-80px;bottom:-75px}
.book-cover.article{background:linear-gradient(145deg,#78483c,#b66a51)}.book-cover small{position:relative;z-index:1;font-size:9px;letter-spacing:.16em;opacity:.78}.book-cover h3{position:relative;z-index:1;font:600 25px/1.3 var(--serif);letter-spacing:-.02em;margin:0}
.book-card-meta{padding:17px 4px 3px}.book-card-meta strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-bottom:5px}.book-card-meta small{color:var(--muted)}

/* Reader */
.reader-layout{display:grid;grid-template-columns:282px minmax(0,1fr) 330px;height:calc(100vh - 74px);overflow:hidden;background:var(--paper)}
.reader-toc,.reader-notes{background:#efede7;padding:24px 20px;overflow:auto}.reader-toc{border-right:1px solid var(--line)}.reader-notes{border-left:1px solid var(--line)}
.reader-toc>h3{font:600 18px/1.4 var(--serif);margin:24px 10px 14px}.reader-main{overflow:auto;background:var(--paper);scroll-behavior:smooth}.reader-article{max-width:820px;margin:auto;padding:72px clamp(34px,7vw,96px) 160px}
.reader-article>h1{font:600 clamp(38px,4.6vw,57px)/1.17 var(--serif);letter-spacing:-.04em;margin:0 0 54px}.reader-content{font:400 19px/2.05 var(--serif);color:#35312b}.reader-content p{margin:0 0 1.9em;text-align:justify}.reader-content h1,.reader-content h2,.reader-content h3{line-height:1.35;letter-spacing:-.025em;margin:2.2em 0 .9em}.reader-content a{color:var(--accent-deep);text-decoration:underline;text-decoration-color:#e8b5a4;text-underline-offset:3px}.reader-content blockquote{margin:2em 0;padding:8px 0 8px 24px;border-left:3px solid var(--accent);color:#646057}.reader-content img{max-width:100%;height:auto;border-radius:12px;box-shadow:var(--shadow-sm)}
.reader-content mark{border-radius:3px;padding:2px 0;background:#f3d995}.reader-content mark.green{background:#cde4d7}.reader-content mark.blue{background:#d4e3ef}.reader-content mark.rose{background:#efd5d3}.reader-content mark.violet{background:#e1d8ef}
.toc-list{display:grid;gap:3px}.toc-item{border:0;background:transparent;border-radius:10px;padding:9px 11px;text-align:left;font-size:12px;line-height:1.5;color:var(--muted);width:100%;transition:.15s}.toc-item.active,.toc-item:hover{background:#fff;color:var(--ink);box-shadow:var(--shadow-xs)}
.reader-tools{position:sticky;top:0;background:rgba(255,254,250,.9);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);padding:10px 18px;display:flex;align-items:center;justify-content:space-between;z-index:5}.reader-tools>span{font-size:11px;color:var(--muted)}
.selection-pop{position:fixed;z-index:50;background:var(--ink);color:#fff;border:1px solid rgba(255,255,255,.1);border-radius:12px;padding:5px;display:flex;box-shadow:var(--shadow-lg);animation:popIn .15s ease}.selection-pop button{border:0;background:transparent;color:#fff;padding:8px 10px;border-radius:8px;font-size:12px}.selection-pop button:hover{background:#45433e}@keyframes popIn{from{opacity:0;transform:translateY(4px) scale(.98)}}
.note-item{background:rgba(255,255,255,.72);border-radius:13px;padding:14px;margin:10px 0;border-left:3px solid #d6ad54;box-shadow:var(--shadow-xs)}.note-item q{display:block;font:14px/1.65 var(--serif)}

/* Knowledge cards */
.card-toolbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}.card-list{display:grid;gap:12px}.knowledge-card{background:rgba(255,254,250,.92);border:1px solid var(--line);border-radius:17px;padding:21px 22px;display:grid;grid-template-columns:1fr auto;gap:18px;cursor:pointer;transition:.2s}
.knowledge-card:hover{transform:translateY(-2px);border-color:#cfc8bc;box-shadow:var(--shadow-sm)}.knowledge-card h3{margin:0 0 9px;font:600 18px/1.45 var(--serif)}.knowledge-card p{margin:0;color:var(--muted);line-height:1.65}.tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:13px}.tag{font-size:10px;font-weight:700;background:#e9e5dc;color:#656057;border-radius:30px;padding:5px 9px}

/* Review */
.review-stage{min-height:calc(100vh - 210px);display:grid;place-items:center}.review-card{position:relative;overflow:hidden;width:min(860px,100%);min-height:500px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-xl);padding:clamp(34px,6vw,74px);box-shadow:var(--shadow-md);display:flex;flex-direction:column;justify-content:center;text-align:center}
.review-card:before{content:"";position:absolute;inset:0 0 auto;height:4px;background:linear-gradient(90deg,var(--sage),var(--accent),#d6ad54)}.review-card h2{font:600 clamp(30px,4vw,46px)/1.32 var(--serif);letter-spacing:-.035em}.review-evidence{border-left:3px solid #d4a347;padding:15px 19px;text-align:left;color:var(--muted);background:var(--amber-soft);border-radius:0 12px 12px 0;margin:23px 0;line-height:1.65}.review-answer{text-align:left;font-size:17px;line-height:1.8}.rating-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:30px}.rating{border:1px solid var(--line);background:#f2efe8;border-radius:13px;padding:14px 8px;transition:.17s}.rating:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}.rating strong{display:block}.rating small{color:var(--muted);font-size:10px}.rating.again:hover{background:#f4d8d2}.rating.hard:hover{background:#f3e4c3}.rating.good:hover{background:#d8e8df}.rating.easy:hover{background:#d6e3ec}

/* AI tutor */
.ai-layout{display:grid;grid-template-columns:270px minmax(0,1fr);height:calc(100vh - 74px);background:var(--paper)}.ai-history{border-right:1px solid var(--line);padding:22px;background:#efede7;overflow:auto}.ai-chat{display:flex;flex-direction:column;min-width:0;background:linear-gradient(180deg,#fffefa 0%,#faf8f3 100%)}
.messages{flex:1;overflow:auto;padding:48px max(24px,calc((100% - 840px)/2))}.message{max-width:760px;margin:0 0 26px;line-height:1.75}.message.user{margin-left:auto;background:#e7e2d8;border-radius:18px 18px 5px 18px;padding:14px 18px;width:max-content;max-width:75%;box-shadow:var(--shadow-xs)}.message.assistant{font:16px/1.85 var(--serif)}
.message.assistant:before{content:"E";float:left;margin:2px 13px 7px 0;width:32px;height:32px;border-radius:10px;background:var(--sage);color:#fff;display:grid;place-items:center;font:16px var(--serif);box-shadow:var(--shadow-xs)}
.message.assistant h2{font:600 28px/1.35 var(--serif);letter-spacing:-.025em}.composer{padding:16px max(24px,calc((100% - 860px)/2)) 28px;background:linear-gradient(transparent,var(--paper) 25%)}.composer-box{background:#fff;border:1px solid var(--line-strong);border-radius:19px;padding:10px;box-shadow:0 16px 46px rgba(42,35,26,.09);transition:.18s}.composer-box:focus-within{border-color:#aaa195;box-shadow:0 18px 54px rgba(42,35,26,.12),0 0 0 4px rgba(65,103,88,.06)}.composer-box textarea{width:100%;border:0;resize:none;outline:none;min-height:74px;padding:10px;background:transparent;line-height:1.55}.composer-actions{display:flex;justify-content:space-between;align-items:center;gap:12px}.segmented{display:flex;background:#e9e5dd;padding:3px;border-radius:11px;overflow:auto}.segmented button{border:0;background:transparent;padding:7px 11px;border-radius:8px;font-size:11px;white-space:nowrap;color:var(--muted)}.segmented button.active{background:#fff;color:var(--ink);box-shadow:var(--shadow-xs)}

/* Writing studio */
.studio-layout{grid-template-columns:310px minmax(0,1fr);align-items:start}.draft-list{display:grid;gap:7px}.draft-item{padding:13px;border-radius:11px;cursor:pointer;transition:.16s}.draft-item strong{display:block;margin-bottom:4px}.draft-item.active,.draft-item:hover{background:#efebe3}.editor-paper{min-height:72vh;padding:clamp(26px,4vw,52px)}.editor-paper input{display:block;width:100%;border:0!important;box-shadow:none!important;background:transparent!important;font:600 38px/1.25 var(--serif);letter-spacing:-.03em;padding:0!important;margin-bottom:24px}.editor-paper textarea{display:block;width:100%;border:0!important;box-shadow:none!important;background:transparent!important;min-height:540px;font:17px/1.95 var(--serif);padding:0!important}

/* Modal and overlays */
.modal-backdrop{position:fixed;inset:0;background:rgba(31,29,25,.5);backdrop-filter:blur(7px);z-index:80;display:grid;place-items:center;padding:22px;animation:fadeIn .17s ease}.modal{background:var(--paper);border:1px solid rgba(255,255,255,.5);border-radius:24px;width:min(730px,100%);max-height:92vh;overflow:auto;box-shadow:var(--shadow-lg);animation:modalIn .2s ease}@keyframes fadeIn{from{opacity:0}}@keyframes modalIn{from{opacity:0;transform:translateY(10px) scale(.985)}}
.modal-head{padding:22px 26px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;background:rgba(255,254,250,.94);backdrop-filter:blur(14px);z-index:2}.modal-head h2{font:600 23px var(--serif);margin:0}.modal-body{padding:26px}.modal-foot{padding:17px 25px;border-top:1px solid var(--line);display:flex;justify-content:flex-end;gap:9px;position:sticky;bottom:0;background:rgba(255,254,250,.95);backdrop-filter:blur(14px)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 17px}.form-grid .full{grid-column:1/-1}.toast-region{position:fixed;right:22px;bottom:22px;z-index:120;display:grid;gap:8px}.toast{background:var(--ink);color:#fff;border:1px solid rgba(255,255,255,.1);border-radius:13px;padding:13px 17px;box-shadow:var(--shadow-md);animation:toastIn .2s ease}.toast.error{background:#963c2e}@keyframes toastIn{from{transform:translateY(10px);opacity:0}}
.skeleton{position:relative;overflow:hidden;background:#ebe7df;border-radius:14px;min-height:120px}.skeleton:after{content:"";position:absolute;inset:0;transform:translateX(-100%);background:linear-gradient(90deg,transparent,rgba(255,255,255,.72),transparent);animation:shimmer 1.25s infinite}@keyframes shimmer{to{transform:translateX(100%)}}
.mobile-nav{display:none}

/* Responsive */
@media(max-width:1180px){.metrics{grid-template-columns:repeat(2,1fr)}.reader-layout{grid-template-columns:235px 1fr}.reader-notes{display:none}.split{grid-template-columns:1fr}.library-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}}
@media(max-width:860px){.app-shell{grid-template-columns:224px minmax(0,1fr)}.sidebar{width:224px}.topbar{padding-inline:24px}.page{padding-inline:24px}.ai-layout{grid-template-columns:220px 1fr}.studio-layout{grid-template-columns:240px 1fr}}
@media(max-width:720px){
  body{font-size:14px}.auth-shell{grid-template-columns:1fr}.auth-story{display:none}.auth-panel{min-height:100vh;padding:28px 22px}.auth-card h2{font-size:32px}
  .app-shell{display:block}.sidebar{display:none}.main-shell{grid-column:auto}.topbar{height:62px;padding:0 17px;background:rgba(245,243,238,.94)}.topbar-title{font-size:13px}.topbar-actions{gap:7px}.topbar-actions .btn{min-height:38px;width:40px;font-size:0;padding:0}.topbar-actions .btn svg{margin:0}.icon-btn{width:39px;height:39px}
  .page{padding:26px 16px 102px}.page-head{align-items:flex-start;flex-direction:column;gap:18px;margin-bottom:25px}.page-head h1{font-size:36px;margin-top:7px}.page-head>.btn{width:100%}
  .metrics{grid-template-columns:1fr 1fr;gap:10px}.metric{padding:16px;min-height:130px;border-radius:17px}.metric strong{font-size:34px}.metric em{line-height:1.35}
  .panel{padding:18px;border-radius:18px}.split{gap:12px}.library-grid{grid-template-columns:1fr 1fr;gap:11px}.book-card{padding:10px;border-radius:17px}.book-cover{height:205px;padding:15px;border-radius:7px 14px 14px 7px;box-shadow:5px 7px 14px #d8d3c9}.book-cover h3{font-size:20px}.book-card-meta{padding:13px 2px 2px}
  .mobile-nav{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;inset:auto 0 0;background:rgba(255,254,250,.94);backdrop-filter:blur(20px);border-top:1px solid var(--line);z-index:70;padding:7px 4px calc(7px + env(safe-area-inset-bottom));box-shadow:0 -10px 30px rgba(35,31,24,.055)}.mobile-nav button{min-height:47px;border:0;background:transparent;font-size:9px;color:var(--muted);display:grid;gap:2px;justify-items:center;align-content:center;border-radius:10px}.mobile-nav svg{width:20px}.mobile-nav button.active{color:var(--accent-deep);background:var(--accent-soft)}
  .reader-layout{display:block;height:calc(100vh - 62px)}.reader-toc{display:none}.reader-main{height:100%}.reader-article{padding:42px 22px 130px}.reader-article>h1{font-size:37px;margin-bottom:38px}.reader-content{font-size:18px;line-height:1.95}.reader-tools{padding:8px 10px}.reader-tools .btn{padding:8px;font-size:11px;min-height:36px}
  .ai-layout{display:block;height:calc(100vh - 62px)}.ai-history{display:none}.ai-chat{height:100%}.messages{padding:28px 18px 130px}.message.user{max-width:88%}.composer{position:fixed;inset:auto 0 calc(61px + env(safe-area-inset-bottom));padding:12px;background:linear-gradient(transparent,var(--paper) 20%)}.composer-box{border-radius:16px}.segmented{max-width:70%}.segmented button{padding:6px 9px}.composer-actions>.btn{min-width:62px}
  .studio-layout{grid-template-columns:1fr}.studio-layout>.panel:first-child{display:none}.editor-paper{padding:24px 20px}.editor-paper input{font-size:31px}.editor-paper textarea{min-height:460px}
  .review-stage{min-height:calc(100vh - 210px)}.review-card{min-height:440px;padding:32px 21px;border-radius:23px}.review-card h2{font-size:30px}.rating-grid{grid-template-columns:1fr 1fr}.form-grid{grid-template-columns:1fr}.form-grid .full{grid-column:auto}.knowledge-card{grid-template-columns:1fr;padding:18px}.modal-backdrop{padding:10px}.modal{border-radius:20px;max-height:94vh}.modal-head{padding:18px}.modal-body{padding:18px}.modal-foot{padding:14px 18px}.toast-region{right:12px;left:12px;bottom:82px}.toast{text-align:center}
}
@media(max-width:390px){.metrics{grid-template-columns:1fr}.library-grid{grid-template-columns:1fr}.book-cover{height:280px}.page-head h1{font-size:33px}.composer-actions{align-items:flex-end}.segmented{max-width:72%}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}