:root{--paper:#f6f5ef;--ink:#292f28;--ink-soft:#4f584d;--muted:#85877b;--line:#dedfd5;--pine:#365143;--pine-deep:#293e33;--coral:#bb654e;--teal:#618c78;--sans:"Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;--serif:"Bodoni 72", "Noto Serif SC", "Songti SC", Georgia, serif;font:14px/1.55 var(--sans);color:var(--ink);background:var(--paper);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,input{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--coral);outline-offset:3px}input[type=range]{cursor:pointer}p{margin:0}#root{min-height:100svh}.eyebrow{color:var(--muted);font:600 10px/1.3 var(--sans);letter-spacing:1.25px;display:block}.brand-lockup{color:var(--ink);align-items:center;gap:10px;font-weight:700;display:inline-flex}.brand-lockup>span:last-child{font-family:var(--serif);gap:2px;font-size:19px;line-height:1;display:grid}.brand-lockup small{color:var(--muted);font:600 8px/1 var(--sans);letter-spacing:1.2px}.brand-mark{aspect-ratio:1;background:var(--pine);color:#fffdf7;width:36px;font:600 18px/1 var(--serif);place-items:center;display:grid}.button{min-height:46px;font:600 14px/1 var(--sans);border:1px solid #0000;justify-content:center;align-items:center;gap:18px;padding:0 18px;transition:background .18s,color .18s,border-color .18s,transform .18s;display:inline-flex}.button--primary{background:var(--pine);color:#fffdf7}.button--primary:hover:not(:disabled){background:var(--pine-deep);transform:translateY(-1px)}.button--quiet{color:var(--ink-soft);background:0 0;border-color:#0000}.button--quiet:hover:not(:disabled),.button--quiet.is-active{color:var(--pine);background:#e9e8df}.button--compact{gap:8px;min-height:38px;padding:0 11px;font-size:12px}.button--small{min-height:38px;margin-top:12px;font-size:12px}.button:disabled{cursor:not-allowed;opacity:.48}.control-dot{aspect-ratio:1;background:var(--coral);border-radius:50%;width:7px}.notice{margin-top:16px;padding:11px 13px;font-size:13px}.notice--error{color:#9e3f31;background:#fae9e4}.notice--success{color:var(--pine);background:#e6eee5}.muted-copy{color:var(--muted)}.auth-layout{background:var(--paper);grid-template-columns:minmax(340px,.92fr) 1.08fr;min-height:100svh;display:grid}.auth-story{color:#f8f4e9;background-color:var(--pine);background-image:repeating-linear-gradient(0deg,#0000 0 43px,#ffffff0e 44px),repeating-linear-gradient(90deg,#0000 0 43px,#ffffff0e 44px);flex-direction:column;justify-content:space-between;min-height:680px;padding:34px clamp(30px,6vw,88px);display:flex;position:relative;overflow:hidden}.auth-story:after{content:"a";color:#e09c701f;font:italic 440px/.8 var(--serif);pointer-events:none;position:absolute;bottom:5%;right:-7%}.auth-story .brand-lockup,.auth-story .brand-lockup small{color:#f8f4e9}.auth-story .brand-mark{color:var(--pine);background:#e9aa82}.auth-story__copy{z-index:1;max-width:520px;margin:auto 0;padding:60px 0;animation:.65s both rise-in;position:relative}.auth-story__copy .eyebrow{color:#d9b08f}.auth-story__copy h1{color:#fffaf0;font:500 clamp(42px, 5vw, 68px)/1.2 var(--serif);margin:20px 0 18px}.auth-story__copy h1 em{color:#e9aa82;font-weight:500}.auth-story__copy p{color:#c6d1c5;max-width:310px;font-size:14px;line-height:1.9}.auth-story__foot{color:#b2c1b4;justify-content:space-between;font-size:11px;display:flex}.auth-panel{flex-direction:column;justify-content:center;align-items:center;padding:40px clamp(26px,6vw,88px);display:flex}.auth-card{width:min(100%,390px);animation:.65s 80ms both rise-in}.auth-card>.eyebrow{color:var(--coral)}.auth-card h2{font:500 30px/1.3 var(--serif);color:var(--ink);margin:12px 0 7px}.auth-card .muted-copy{margin-bottom:34px;font-size:13px}.field-label{color:var(--ink-soft);margin:19px 0 8px;font-size:12px;font-weight:600;display:block}.text-field{border:1px solid var(--line);width:100%;min-height:48px;color:var(--ink);font:14px var(--sans);background:#fffefa;padding:0 13px;display:block}.text-field::placeholder{color:#aaa99e}.auth-actions{grid-template-columns:1fr auto;gap:10px;margin-top:25px;display:grid}.auth-panel__foot{color:#9c9c90;margin-top:45px;font-size:11px}.app-shell{background-color:var(--paper);background-image:radial-gradient(#45523f1c .65px,#0000 .65px);background-size:16px 16px;min-height:100svh}.topbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;width:min(1180px,100% - 64px);min-height:76px;margin:0 auto;display:flex}.topbar-actions{flex-wrap:wrap;align-items:center;gap:4px;display:flex}.dashboard-layout{grid-template-columns:minmax(0,1fr) 300px;gap:76px;width:min(1180px,100% - 64px);margin:0 auto;padding:66px 0 80px;display:grid}.dashboard-main{min-width:0}.page-heading{margin-bottom:36px;animation:.48s both rise-in}.page-heading .eyebrow{color:var(--coral)}.page-heading h1,.completion-card h1{color:var(--ink);font:500 47px/1.15 var(--serif);margin:10px 0 7px}.heading-period{color:var(--coral)}.page-heading p{color:var(--muted);font-size:13px}.stats-grid{border-block:1px solid var(--line);grid-template-columns:repeat(3,minmax(0,1fr));padding:19px 0;display:grid}.stat-item{border-left:1px solid var(--line);gap:4px;padding:0 17px;display:grid}.stat-item:first-child{border-left:0;padding-left:0}.stat-item>span{color:var(--muted);font-size:12px}.stat-item strong{color:var(--ink);font:500 36px/1 var(--serif);font-variant-numeric:tabular-nums}.stat-item small{color:#99998e;font-size:10px}.stat-item--highlight strong{color:var(--coral)}.study-section{margin-top:44px}.section-heading{justify-content:space-between;align-items:end;margin-bottom:17px;display:flex}.section-heading .eyebrow{color:var(--muted)}.section-heading h2{color:var(--ink);font:500 23px/1.3 var(--serif);margin:7px 0 0}.section-index{color:#a5a498;font:10px var(--sans)}.study-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.study-option{border:1px solid var(--line);text-align:left;flex-direction:column;align-items:flex-start;min-width:0;min-height:217px;padding:19px;transition:transform .2s,border-color .2s,box-shadow .2s;display:flex;position:relative}.study-option:hover:not(:disabled){border-color:#98a58e;transform:translateY(-3px);box-shadow:0 12px 26px #24312514}.study-option:disabled{opacity:.52;cursor:not-allowed}.study-option--review{background:#edf0e9}.study-option--new{background:#f8ebe2}.study-option__number{color:#787e70;font:10px var(--sans)}.study-option__icon{color:var(--pine);font:30px/1 var(--serif);position:absolute;top:15px;right:18px}.study-option--new .study-option__icon{color:#b65f48}.study-option__title{color:var(--ink);font:500 22px/1.2 var(--serif);margin-top:20px}.study-option__description{color:#787b70;margin-top:5px;font-size:11px}.study-option__footer{color:#777b6e;justify-content:space-between;gap:8px;width:100%;margin-top:auto;padding-top:19px;font-size:10px;display:flex}.study-option__arrow{color:var(--pine);font-weight:700}.study-option--new .study-option__arrow{color:#a9503e}.dashboard-aside{flex-direction:column;gap:12px;padding-top:17px;animation:.55s .12s both rise-in;display:flex}.aside-panel{border:1px solid var(--line);background:#fffefac2}.advice-panel{background:#e7ede5;border-color:#d6dfd3;padding:20px}.aside-panel__heading{align-items:center;gap:12px;margin-bottom:14px;display:flex}.aside-icon{aspect-ratio:1;background:var(--pine);color:#fff;place-items:center;width:33px;font-size:17px;display:grid}.aside-panel__heading .eyebrow{color:#788574}.aside-panel__heading h2{color:var(--ink);font:500 19px var(--serif);margin:3px 0 0}.advice-panel>p{color:#475346;font-size:12px;line-height:1.85}.advice-panel .muted-copy{color:#667363}.cache-note{color:#76816f;margin-top:12px;font-size:10px;display:inline-block}.settings-panel summary,.curve-panel summary{cursor:pointer;justify-content:space-between;align-items:center;gap:10px;min-height:67px;padding:12px 15px;list-style:none;display:flex}.settings-panel summary::-webkit-details-marker{display:none}.curve-panel summary::-webkit-details-marker{display:none}.settings-panel summary>span:first-child,.curve-panel summary>span:first-child{gap:5px;display:grid}.settings-panel summary strong,.curve-panel summary strong{color:var(--ink);font:500 16px var(--serif)}.summary-value{color:var(--muted);white-space:nowrap;font-size:10px}.summary-value>span{color:var(--pine);margin-left:7px;font-size:14px}.settings-panel[open] .summary-value>span,.curve-panel[open] .summary-value>span{display:inline-block;transform:rotate(45deg)}.disclosure-content{color:var(--ink-soft);padding:0 15px 15px;font-size:11px}.disclosure-content>p{margin-bottom:12px}.disclosure-content input[type=range]{width:100%;accent-color:var(--pine)}.range-labels,.chart-axis{color:#99998e;justify-content:space-between;font-size:9px;display:flex}.mini-bars{align-items:end;gap:3px;height:54px;margin-top:10px;display:flex}.mini-bars__bar{border-radius:2px 2px 0 0;flex:1;min-width:2px}.chart-block+.chart-block{margin-top:18px}.chart-label{color:var(--ink-soft);justify-content:space-between;font-size:10px;display:flex}.chart-label span:last-child{color:var(--muted)}.distribution-row{border-top:1px solid var(--line);color:var(--muted);justify-content:space-between;gap:8px;margin-top:18px;padding-top:12px;font-size:9px;display:flex}.distribution-row b{color:var(--ink);font-size:11px}.aside-footnote{color:#757b6f;font:13px/1.6 var(--serif);align-items:center;gap:10px;padding:17px 3px;display:flex}.footnote-mark{color:var(--coral);font-size:20px}.app-shell--study,.app-shell--narrow{min-height:100svh}.study-stage{width:min(680px,100% - 40px);margin:0 auto;padding:52px 0 70px;animation:.45s both rise-in}.study-progress{color:var(--muted);justify-content:space-between;font-size:11px;display:flex}.study-progress>span:last-child{color:var(--ink);font-variant-numeric:tabular-nums}.study-progress i{color:#aaa99c;margin:0 5px;font-style:normal}.progress-track{background:#deded4;height:3px;margin-top:12px}.progress-track>span{background:var(--coral);height:100%;transition:width .35s;display:block}.difficult-tag{color:#a0523e;background:#f6e8dc;margin-top:21px;padding:5px 9px;font-size:10px;display:inline-block}.word-display{border:1px solid var(--line);text-align:center;background:#fffefae6;flex-direction:column;justify-content:center;align-items:center;min-height:275px;margin-top:22px;padding:30px 20px;display:flex}.word-display .eyebrow{color:#9a9b8e}.word-display h1{color:var(--ink);font:500 clamp(42px, 8vw, 64px)/1.1 var(--serif);overflow-wrap:anywhere;align-items:center;gap:14px;margin:19px 0 18px;display:flex}.audio-button{aspect-ratio:1;border:1px solid var(--line);width:38px;color:var(--pine);font:20px var(--sans);background:0 0;place-items:center;display:grid}.audio-button:hover{border-color:var(--pine);background:#edf0e9}.meaning-reveal{place-items:center;min-height:37px;display:grid}.meaning-reveal p{color:#525d4c;font:18px/1.5 var(--serif)}.reveal-button,.hint-trigger{min-height:38px;color:var(--pine);font:12px var(--sans);background:0 0;border:0;padding:0 12px}.reveal-button:hover,.hint-trigger:hover:not(:disabled){background:#edf0e9}.reveal-button span{color:var(--coral);margin-right:4px}.hint-area{min-height:47px;padding:6px 0}.hint-card{color:#4e554b;background:#f3eee3;border-left:2px solid #d3a177;padding:14px 16px;font-size:12px;line-height:1.8}.hint-translation{color:var(--muted)}.hint-tip{color:#96744d;margin-top:5px}.grade-area{grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:23px;display:grid}.grade-area>.eyebrow{text-align:center;grid-column:1/-1;margin-bottom:3px}.grade-button{border:1px solid var(--line);min-height:60px;color:var(--ink-soft);font:600 13px var(--sans);background:#fffefa;flex-direction:column;justify-content:center;gap:3px;transition:transform .16s,border-color .16s,background .16s;display:flex}.grade-button:hover:not(:disabled){border-color:var(--pine);background:#edf0e9;transform:translateY(-2px)}.grade-button small{color:var(--muted);font-size:9px;font-weight:400}.grade-button--1{color:#a34e3f}.grade-button--2{color:#a26d36}.grade-button--4,.grade-button--strong{color:var(--pine)}.spelling-practice{text-align:center;flex-direction:column;align-items:center;padding:55px 20px 28px;display:flex}.spelling-practice .eyebrow{color:var(--muted)}.spelling-meaning{color:var(--ink);font:24px/1.5 var(--serif);margin:20px 0}.spelling-input{border:1px solid var(--line);width:min(100%,460px);min-height:58px;color:var(--ink);text-align:center;font:22px var(--serif);background:#fffefa;margin-bottom:14px;padding:0 14px}.answer-feedback{border-top:1px solid var(--line);width:100%;margin-top:23px;padding-top:20px}.answer-feedback>p{font:16px var(--serif);margin-bottom:14px}.answer-feedback--wrong>p{color:#a34e3f}.answer-feedback--correct>p{color:var(--pine)}.grade-actions{justify-content:center;gap:8px;display:flex}.completion-card{border:1px solid var(--line);text-align:center;background:#fffefa;flex-direction:column;align-items:center;width:min(100% - 40px,500px);margin:95px auto 0;padding:50px 25px;animation:.55s both rise-in;display:flex}.completion-mark{aspect-ratio:1;color:#fff;background:var(--pine);border-radius:50%;place-items:center;width:52px;margin-bottom:23px;font-size:22px;display:grid}.completion-card .eyebrow{color:var(--coral)}.completion-card h1{font-size:37px}.completion-card>p{color:var(--muted);margin:8px 0 25px;font-size:13px;line-height:1.9}.completion-card>p strong{color:var(--ink);font:500 18px var(--serif)}.app-screen--center{min-height:100svh;color:var(--muted);flex-direction:column;justify-content:center;align-items:center;gap:15px;font-size:13px;display:flex}.loading-mark{aspect-ratio:1;border:2px solid #d7ddd2;border-top-color:var(--pine);border-radius:50%;width:24px;animation:.8s linear infinite spin}@keyframes rise-in{0%{opacity:0;transform:translateY(9px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@media (width<=900px){.dashboard-layout{grid-template-columns:minmax(0,1fr) 260px;gap:34px}.study-option{padding:15px}.study-option__footer{flex-direction:column;gap:5px}}@media (width<=680px){.auth-layout{grid-template-columns:1fr}.auth-story{min-height:260px;padding:23px 25px}.auth-story:after{font-size:250px;bottom:-10%;right:-3%}.auth-story__copy{padding:36px 0 20px}.auth-story__copy h1{margin:12px 0 10px;font-size:38px}.auth-story__copy p{max-width:280px;font-size:12px}.auth-story__foot{font-size:9px}.auth-panel{justify-content:flex-start;padding:42px 25px 24px}.auth-card h2{font-size:26px}.auth-panel__foot{margin-top:30px}.topbar,.dashboard-layout{width:calc(100% - 36px)}.topbar{min-height:68px}.brand-lockup>span:last-child{font-size:16px}.brand-mark{width:32px;font-size:16px}.topbar-actions{gap:0}.button--compact{padding:0 8px;font-size:10px}.dashboard-layout{grid-template-columns:1fr;gap:31px;padding:42px 0 50px}.page-heading{margin-bottom:26px}.page-heading h1{font-size:39px}.stats-grid{padding:15px 0}.stat-item{padding:0 10px}.stat-item strong{font-size:29px}.stat-item>span{font-size:11px}.stat-item small{font-size:9px}.study-section{margin-top:34px}.section-heading h2{font-size:21px}.study-options{gap:8px}.study-option{min-height:192px;padding:13px 11px}.study-option__title{font-size:19px}.study-option__description{min-height:32px;font-size:10px;line-height:1.6}.study-option__footer{font-size:9px}.dashboard-aside{padding-top:0}.aside-footnote{display:none}.study-stage{width:calc(100% - 32px);padding-top:28px}.study-stage>.topbar{width:100%}.word-display{min-height:245px;padding:26px 13px}.word-display h1{gap:9px;font-size:clamp(38px,12vw,54px)}.audio-button{width:34px}.grade-area{gap:6px}.grade-button{min-height:57px;font-size:12px}.grade-button small{font-size:8px}.completion-card{margin-top:55px;padding:38px 18px}}@media (width<=380px){.topbar-actions .button--compact{padding:0 5px;font-size:9px}.control-dot{display:none}.study-options{grid-template-columns:1fr}.study-option{min-height:166px;padding:16px}.study-option__footer{flex-direction:row}.stats-grid{gap:0}.stat-item{padding:0 7px}.stat-item>span{font-size:10px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}
