:root{--bg:#f6f5ef;--paper:#fffefa;--ink:#273d39;--muted:#77817a;--line:#e3e6db;--green:#396c52;--light:#edf2e6;--orange:#a65b3f;--serif:Georgia,"Times New Roman",serif;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-size:15px;line-height:1.65}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:wait;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #9bba76;outline-offset:3px}button{border:0}a{color:inherit;text-decoration:none}[hidden]{display:none!important}h1,h2,p{margin:0}h1{font-size:34px;font-weight:650;letter-spacing:-1.4px;line-height:1.4}h2{font-size:19px;font-weight:600}input,select{font-size:16px;border:1px solid var(--line);border-radius:10px;padding:13px 15px;background:var(--paper);color:var(--ink);min-height:48px;max-width:100%}input[type=file]{font-size:13px;padding:8px;min-height:44px}label{display:block}progress{width:100%;height:8px;border:0;border-radius:20px;overflow:hidden;background:#dfe6d9}progress::-webkit-progress-bar{background:#dfe6d9}progress::-webkit-progress-value{background:var(--green);border-radius:20px}progress::-moz-progress-bar{background:var(--green)}.muted{color:var(--muted)}.micro{font-size:12px;color:var(--muted);line-height:1.7}.eyebrow{font-size:11px;font-weight:650;letter-spacing:2px}.row-between{display:flex;align-items:center;justify-content:space-between;gap:16px}.primary,.secondary,.reveal-button{display:inline-flex;align-items:center;justify-content:center;gap:20px;border-radius:10px;padding:14px 24px;min-height:50px;font-weight:600}.primary{background:var(--green);color:white}.primary:hover{background:#2c5741}.primary span{margin-left:auto}.secondary{background:var(--paper);border:1px solid var(--line)}.text-button{background:none;color:var(--muted);padding:12px 0;min-height:44px}.wide{width:100%}.pill{display:inline-block;background:#e9eddf;border:1px solid #dbe4d2;color:#5b6d49;font-size:12px;border-radius:50px;padding:7px 13px;white-space:nowrap}.pill.pale{background:rgba(255,255,255,.65);border-color:transparent}.brand-mark{width:39px;height:39px;border:1px solid var(--green);background:var(--green);color:white;display:inline-flex;align-items:center;justify-content:center;font-size:23px;border-radius:12px 12px 12px 3px}.app-shell{display:flex;min-height:100vh}.sidebar{width:216px;position:fixed;inset:0 auto 0 0;display:flex;flex-direction:column;background:var(--paper);padding:34px 22px;border-right:1px solid var(--line)}.brand{display:flex;gap:11px;align-items:center;font-size:23px;font-weight:650;line-height:1.15}.brand small{display:block;font-size:8px;letter-spacing:1.9px;font-weight:600;margin-top:7px}.nav-caption{font-size:11px;color:var(--muted);margin:39px 4px 19px}.nav-item{display:flex;align-items:center;gap:14px;background:transparent;width:100%;border-radius:9px;padding:13px 16px;text-align:left;color:var(--muted);margin:7px 0;min-height:49px}.nav-item span{font-size:18px}.nav-item.active{background:var(--light);color:var(--green);font-weight:600}.sidebar-note{margin-top:auto;padding:55px 10px 22px}.sidebar-note span{font-size:17px;line-height:1.9;letter-spacing:2px}.sidebar-note p{font-size:10px;color:var(--muted);margin-top:14px}.sidebar #logout{text-align:left;padding-left:10px;font-size:12px}main{margin-left:216px;padding:27px 44px 50px;width:calc(100% - 216px);max-width:1500px}.topbar{display:flex;align-items:center;justify-content:space-between;padding-bottom:23px;border-bottom:1px solid var(--line);margin-bottom:35px}.topbar .eyebrow{color:var(--muted);font-size:9px}.topbar p{font-size:13px;margin-top:3px}.page-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin:0 0 27px}.page-heading p{font-size:13px;margin-top:9px}.tiny-label{font-size:9px;letter-spacing:2px;color:var(--muted);white-space:nowrap;padding-bottom:5px}.dashboard-grid{display:grid;grid-template-columns:1.17fr 1fr;gap:20px}.daily-card{border:1px solid #dce5d1;border-radius:16px;padding:26px 28px;background:#eaf0df}.goal-number{display:flex;align-items:baseline;gap:13px;margin:13px 0 7px}.goal-number strong{font-family:var(--serif);font-size:72px;font-weight:400;line-height:1.1;letter-spacing:-3px}.goal-number span{color:#7c8e70;font-size:16px}.goal-number b{font-weight:400}.daily-card #plan-caption{margin:9px 0 20px;font-size:12px;min-height:21px}.daily-card .micro{font-size:10px;text-align:center;margin-top:12px}.note-card{background:#e7e7dc;border-radius:16px;padding:28px 30px;position:relative;overflow:hidden;display:flex;flex-direction:column}.note-card .eyebrow{color:#8b907d;font-size:9px}.note-word{font-family:var(--serif);font-size:44px;letter-spacing:-1.5px;margin-top:33px}.note-word span{display:block;font-family:inherit;font-size:15px;letter-spacing:0;font-style:italic;color:#8b907d;margin-top:-5px}.note-card>p{font-size:13px;line-height:1.9;margin-top:19px}.note-footer{margin-top:auto;padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#818b78}.note-footer span{font-size:46px;line-height:1;color:#6c815c}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);margin:25px 0;gap:15px}.stats-grid article{border:1px solid var(--line);border-radius:12px;background:var(--paper);padding:21px}.stats-grid span{display:block;font-size:11px;color:var(--muted)}.stats-grid strong{display:block;font-size:30px;font-weight:500;margin:5px 0;line-height:1.3;font-variant-numeric:tabular-nums}.stats-grid small{font-size:10px;color:var(--muted)}.history-card{border:1px solid var(--line);border-radius:12px;padding:23px 25px;background:var(--paper)}.history-card h2{font-size:16px}.history-card .row-between>.muted{font-size:11px}.history-grid{display:grid;grid-template-columns:repeat(14,1fr);gap:7px;margin:23px 0 14px}.history-day{text-align:center;min-width:0}.history-day span{display:flex;align-items:center;justify-content:center;border-radius:6px;background:#eef0e9;height:32px;color:#aab1a2;font-size:12px}.history-day.complete span{background:#5d8260;color:white}.history-day.partial span{background:#dce8cf;color:#557849}.history-day small{display:block;font-size:9px;color:#909888;margin-top:6px}.study-toolbar{display:flex;align-items:center;justify-content:space-between;margin:-10px 0 12px}.study-toolbar span{font-size:12px}.flashcard{max-width:860px;margin:auto;border:1px solid var(--line);background:var(--paper);border-radius:20px;padding:26px 32px 30px;min-height:480px}.flashcard .pill{background:var(--light)}#card-category{max-width:60%;text-align:right}.word-face{text-align:center;padding:48px 0 40px}.word-face h2{font-family:var(--serif);font-size:58px;font-weight:400;letter-spacing:-1px;overflow-wrap:anywhere;line-height:1.2}.pronunciation{display:flex;align-items:center;justify-content:center;gap:15px;color:var(--muted);font-size:17px;margin:20px 0}.audio-button{background:var(--light);color:var(--green);border-radius:50px;font-size:12px;padding:9px 14px;min-height:44px}.word-face p{font-size:13px;margin-top:30px}.reveal-button{width:100%;background:var(--light);color:var(--green)}.senses{border-top:1px solid var(--line);padding:7px 0 16px}.sense{padding:14px 0;border-bottom:1px solid #eeefe8}.sense p{font-size:18px}.sense .pos{font-family:var(--serif);font-style:italic;color:var(--muted);margin-right:13px}.sense small{font-size:11px;color:var(--muted);display:block;margin-top:5px}.rating-buttons{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:19px}.rating-buttons button{border-radius:11px;padding:15px 12px;font-size:18px;font-weight:600;min-height:82px}.rating-buttons small{display:block;font-size:10px;font-weight:400;margin-top:4px}.unknown{background:#f5e8dc;color:#a35e3e}.known{background:var(--green);color:white}.error{color:#b14635;font-size:13px;margin-top:12px;min-height:1em}.session-end{text-align:center;padding:50px 24px;background:var(--paper);border:1px solid var(--line);border-radius:18px}.end-symbol{font-size:60px;color:var(--green)}.session-end h2{font-size:27px;margin:14px 0}.session-end p{margin:12px 0;max-width:580px;margin-left:auto;margin-right:auto}.end-actions{display:flex;justify-content:center;gap:12px;margin:25px 0;flex-wrap:wrap}.import-card,.settings-card{background:var(--paper);border:1px solid var(--line);padding:25px;border-radius:14px;margin-bottom:23px}.import-card p{font-size:12px;margin-top:7px}.import-controls{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:18px}.file-label{font-size:12px}.library-filters{display:grid;grid-template-columns:1fr 250px;gap:16px;margin:22px 0 10px}.library-filters input,.library-filters select{width:100%}.table-scroll{overflow:auto;background:var(--paper);border:1px solid var(--line);border-radius:12px;margin:13px 0}table{width:100%;border-collapse:collapse;font-size:13px;text-align:left}th{background:#eef1e7;font-size:11px;color:#6e7d65;font-weight:500;padding:13px 18px;white-space:nowrap}td{padding:16px 18px;border-top:1px solid var(--line);overflow-wrap:anywhere}td:first-child{font-family:var(--serif);font-size:18px;min-width:165px}td small{display:block;color:var(--muted);font-size:12px;margin-top:5px}td:last-child{font-size:11px;color:var(--muted)}.pagination{display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:12px}.pagination .secondary{font-size:12px;padding:10px 17px}.info-strip{background:var(--light);border-radius:10px;padding:20px 23px;font-size:13px;line-height:1.9;margin-bottom:25px}.difficult-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.difficult-word{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:23px;overflow-wrap:anywhere}.difficult-word h2{font-family:var(--serif);font-size:25px;font-weight:400;margin-bottom:10px}.difficult-word p{font-size:12px;color:var(--orange)}.difficult-word small{font-size:11px;color:var(--muted)}.settings-card{max-width:850px}.settings-card h2{margin-bottom:17px}.settings-card label{font-size:13px}.settings-card p{font-size:12px;margin:14px 0}.goal-input{display:flex;align-items:center;gap:15px;margin:13px 0}.goal-input input{width:130px;font-size:23px}.goal-input span{font-size:13px;color:var(--muted)}.method-list{padding-left:22px;font-size:13px;color:var(--muted)}.method-list li{margin:15px 0}.method-list strong{color:var(--ink);font-weight:500}.inline-button{font-size:13px}.login-view{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}.login-art{background:#e9efde;padding:8vh 8vw;display:flex;flex-direction:column;justify-content:center;overflow:hidden}.login-art>.eyebrow{margin:38px 0 17px;color:#819071}.login-art h1{font-size:clamp(38px,4vw,66px);line-height:1.4}.login-art>p:last-of-type{color:var(--muted);font-size:13px;margin-top:17px}.book-art{font-family:var(--serif);font-size:72px;display:flex;justify-content:space-between;align-items:flex-end;border-bottom:1px solid #afbea0;padding:20px 0 10px;color:#7c966a}.book-art span{font-family:inherit;font-size:10px;letter-spacing:3px;line-height:1.8;padding-bottom:17px}.login-form{align-self:center;max-width:410px;width:100%;padding:35px;margin:auto}.login-form h2{font-size:28px;margin:14px 0}.login-form>.muted{font-size:13px;margin-bottom:31px}.login-form label{font-size:12px;margin-bottom:8px}.login-form input,.login-form button{width:100%}.login-form button{margin-top:22px}.boot{padding:25vh 20px;text-align:center;color:var(--muted)}.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);background:#2f483c;color:white;padding:13px 22px;border-radius:10px;z-index:30;font-size:13px;max-width:90vw;box-shadow:0 8px 25px #1b392322}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(min-width:1500px){main{margin-left:auto;margin-right:auto;padding-left:255px;width:100%;max-width:1600px}}
@media(max-width:1100px){.sidebar{width:180px;padding:27px 16px}main{margin-left:180px;width:calc(100% - 180px);padding:24px 27px}.daily-card{padding:22px}.note-card{padding:25px}.note-word{font-size:36px}.stats-grid{gap:10px}.stats-grid article{padding:18px 15px}.stats-grid small{font-size:9px}.tiny-label{display:none}.difficult-grid{grid-template-columns:repeat(2,1fr)}h1{font-size:30px}.history-grid{gap:5px}}
@media(max-width:760px){.sidebar{inset:auto 0 0 0;width:100%;height:calc(70px + env(safe-area-inset-bottom));padding:4px 10px env(safe-area-inset-bottom);z-index:20;border-right:0;border-top:1px solid var(--line);background:#fffefaf5}.sidebar .brand,.nav-caption,.sidebar-note,.sidebar #logout{display:none}.sidebar nav{display:grid;grid-template-columns:repeat(4,1fr);width:100%}.nav-item{display:flex;flex-direction:column;gap:0;padding:4px;margin:0;border-radius:8px;font-size:10px;min-height:57px;justify-content:center}.nav-item span{font-size:21px}main{margin:0;width:100%;padding:20px 19px 115px}.topbar{margin-bottom:25px;padding-bottom:16px}.topbar .pill{font-size:10px;padding:6px 11px}.page-heading{margin-bottom:23px}.page-heading p{font-size:12px}h1{font-size:27px;letter-spacing:-.8px}.dashboard-grid{grid-template-columns:1fr}.note-card{display:none}.goal-number strong{font-size:65px}.stats-grid{grid-template-columns:repeat(2,1fr);gap:12px;margin:19px 0}.stats-grid article{padding:17px 19px}.stats-grid small{font-size:10px}.history-card{padding:19px 15px}.history-grid{gap:4px}.history-day span{height:25px;font-size:10px}.history-day small{font-size:8px}.history-card h2{font-size:15px}.history-card .micro{font-size:10px}.flashcard{padding:20px 20px 24px;min-height:440px}.word-face{padding:42px 0 28px}.word-face h2{font-size:43px}.pronunciation{font-size:14px;flex-wrap:wrap;gap:7px}.rating-buttons{gap:10px}.rating-buttons button{font-size:17px}.rating-buttons small{font-size:9px}.library-filters{grid-template-columns:1fr;gap:10px}.import-card,.settings-card{padding:20px}.import-controls input{width:100%}.import-controls button{width:100%}.file-label{display:none}td,th{padding:12px}.table-scroll{font-size:12px}.difficult-grid{gap:11px}.difficult-word{padding:17px}.difficult-word h2{font-size:21px}.login-view{grid-template-columns:1fr}.login-art{min-height:35vh;padding:35px 30px}.login-art .eyebrow{margin:20px 0 10px}.login-art h1{font-size:32px}.login-art .book-art{display:none}.login-art h1 br{display:none}.login-form{padding:29px 30px 45px}.login-form h2{font-size:25px}.toast{bottom:90px}.session-end{padding:30px 15px}.session-end h2{font-size:24px}}
@media(prefers-reduced-motion:no-preference){button{transition:background .15s,opacity .15s}}
.calendar-heading{align-items:flex-start}.calendar-heading .text-button{font-size:12px;padding:0;white-space:nowrap}.calendar-toolbar{display:flex;align-items:center;justify-content:space-between;margin:18px 0 7px}.calendar-toolbar h3{font-size:18px;font-weight:600;margin:0}.calendar-toolbar .secondary{min-height:44px;padding:7px 17px}.calendar-weekdays,.calendar-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px}.calendar-weekdays{text-align:center;color:var(--muted);font-size:12px;margin:19px 0 10px}.calendar-day{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:66px;min-width:0;padding:7px 2px;border-radius:9px;border:1px solid transparent;background:#f0f2eb;color:var(--ink);font-variant-numeric:tabular-nums}.calendar-day>span{font-size:16px}.calendar-day small{font-size:11px;min-height:18px;color:var(--muted)}.calendar-day.complete{background:var(--green);color:white}.calendar-day.complete small{color:white}.calendar-day.partial{background:#f7e6d5;color:#945230}.calendar-day.partial small{color:#945230}.calendar-day.today{border-color:var(--green);font-weight:700}.calendar-day.selected{outline:2px solid var(--ink);outline-offset:2px}.calendar-day:disabled{cursor:default;opacity:.32}.calendar-legend{display:flex;flex-wrap:wrap;gap:16px;margin:17px 0;font-size:11px;color:var(--muted)}.calendar-legend span{display:flex;align-items:center;gap:6px}.calendar-legend i{display:inline-block;width:10px;height:10px;border-radius:3px;background:#edf0e6}.calendar-legend i.complete{background:var(--green)}.calendar-legend i.partial{background:#eecba7}.calendar-detail{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:16px 18px;margin-bottom:14px;min-height:98px}.calendar-detail h3{font-size:15px;margin:0 0 8px}.calendar-detail p{font-size:12px;margin:5px 0}.calendar-detail .micro{font-size:11px}.calendar-grid:empty,.calendar-detail:empty{display:none}
@media(max-width:760px){.calendar-weekdays,.calendar-grid{gap:6px}.calendar-day{min-height:54px}.calendar-day>span{font-size:14px}.calendar-day small{font-size:9px}.calendar-detail{padding:13px}.calendar-heading .micro{max-width:210px}.calendar-legend{gap:12px}.calendar-toolbar h3{font-size:17px}}