:root{--paper:#f7f8f4;--ink:#253b34;--muted:#758078;--green:#214e43;--line:#e1e6df;--white:#fff;--soft:#edf2eb}*{box-sizing:border-box}body{margin:0;font-family:"Malgun Gothic","Apple SD Gothic Neo",sans-serif;background:var(--paper);color:var(--ink);font-size:14px}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #83ac9b;outline-offset:3px}button{border:0;background:none;color:inherit}a{color:inherit;text-decoration:none}[hidden]{display:none!important}.shell{display:grid;grid-template-columns:244px minmax(0,1fr);min-height:100vh}.sidebar{background:#fff;border-right:1px solid var(--line);padding:36px 23px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:12px;font-size:16px;font-weight:700;letter-spacing:-.6px}.brand-mark{background:var(--green);color:#fff;font-family:serif;font-size:27px;display:grid;place-items:center;width:43px;height:46px;border-radius:12px}.brand small{display:block;font-size:8px;letter-spacing:1.6px;color:var(--muted);margin-top:7px}.nav-caption{margin:56px 12px 16px;font-size:11px;color:#8b948d}nav{display:grid;gap:8px}nav button{display:flex;gap:13px;align-items:center;padding:14px;border-radius:9px;text-align:left;color:#6b756e}nav button span{flex:1}nav button b{font-size:11px;font-weight:400}nav button.active{background:var(--soft);color:var(--green);font-weight:700}.sidebar-note{margin-top:auto;font-size:12px;color:#66786e;padding:22px 8px 0}.sidebar-note p{font-size:11px}.sidebar-note small{font-size:10px;color:#919991}.live-dot{display:inline-block;width:6px;height:6px;background:#689680;border-radius:50%;margin-right:5px}.main{max-width:1410px;width:100%;padding:0 52px;margin:auto}.topbar{height:86px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;color:var(--muted);font-size:10px;letter-spacing:.9px}.topbar .slash{margin:0 16px;color:#bbc5ba}#breadcrumb{letter-spacing:0}.quiet{padding:10px 12px;border:1px solid var(--line);background:#fff;border-radius:7px;font-size:12px}.intro{padding:43px 0 28px}.eyebrow{font-size:11px;color:#779184;letter-spacing:1.3px}h1{font-size:34px;letter-spacing:-1.8px;font-weight:600;margin:13px 0}h1 span{color:#8aab70}.intro p{font-size:13px;color:var(--muted);line-height:1.8}.continue{background:var(--green);border-radius:14px;padding:27px 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.15s,border-color .15s}.subject:hover{transform:translateY(-2px);border-color:#7da58f}.subject.active{border-color:#3f735a;box-shadow:0 0 0 1px #3f735a;background:#f1f5ee}.subject-icon{display:grid;place-items:center;width:34px;height:34px;background:#edf3ed;border-radius:9px;font:26px Georgia,serif;margin-bottom:15px}.subject:nth-child(2) .subject-icon{background:#edf0f7;color:#5e7295}.subject:nth-child(3) .subject-icon{background:#f5eee3;color:#997342}.subject:nth-child(4) .subject-icon{background:#eeecf5;color:#796697}.subject:nth-child(5) .subject-icon{background:#eaf3f4;color:#59838e}.subject strong{font-size:12px;display:block;line-height:1.6}.subject small{display:block;color:var(--muted);font-size:10px;margin-top:8px}.materials{margin-top:32px}.list-toolbar{display:flex;gap:16px;align-items:center;justify-content:space-between;margin-bottom:16px}#result-count{font-size:12px;color:#8b998c;margin-left:7px}.search{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:0 12px;width:300px}.search>span{font-size:25px;color:#8b968f}.search input{min-width:0;width:100%;padding:12px 0;border:0;background:transparent;font-size:12px;color:var(--ink);outline-offset:0}.results{border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}.lesson{display:flex;align-items:center;gap:18px;padding:18px 22px;border-bottom:1px solid #edf0e9}.lesson:last-child{border:0}.chapter{font-family:Georgia,serif;font-size:20px;color:#a0b0a1;width:30px;flex-shrink:0}.lesson-main{flex:1;min-width:0;cursor:pointer}.lesson-main a{font-weight:600;font-size:14px;line-height:1.7}.lesson-main a:hover{color:#55806a}.lesson-meta{display:flex;gap:12px;align-items:center;margin-top:6px;font-size:10px;color:var(--muted);flex-wrap:wrap}.pill{background:#eef3e9;padding:3px 6px;border-radius:4px;color:#62805d}.bookmark{font-size:19px;color:#a0aca2;min-height:42px;min-width:42px;border-radius:7px}.bookmark[aria-pressed=true]{color:#b1863c;background:#fbf5e9}.snippet{font-size:12px;color:#778479;line-height:1.8;margin:8px 0 0}.empty{text-align:center;padding:55px 20px;color:var(--muted);line-height:2}.empty strong{display:block;color:var(--ink)}footer{font-weight:700;padding:30px 0;color:#7a8c7d;font-size:13px;display:flex;gap:18px;align-items:center}footer span{font-size:10px;font-weight:400;color:#909b90}#updated{margin-left:auto}.reader{height:100dvh;display:flex;flex-direction:column;background:#fff}.reader-bar{display:flex;align-items:center;gap:16px;padding:12px 24px;border-bottom:1px solid var(--line)}.reader-heading{flex:1;min-width:0}.reader-heading strong{display:block;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.reader-heading small{font-size:10px;color:var(--muted);display:block;margin-bottom:4px}.primary{background:var(--green);color:#fff;border-radius:7px;padding:11px 15px;font-size:12px}.reader-tools{display:flex;align-items:center;justify-content:center;gap:24px;padding:8px;background:#f7f8f4}.reader-tools label{font-size:11px;color:var(--muted);display:flex;align-items:center;gap:8px;min-width:0}.reader-tools select{max-width:350px;min-width:0;border:1px solid var(--line);border-radius:5px;padding:8px;background:#fff;font-size:12px}.reader iframe{border:0;width:100%;flex:1;min-height:0}.reading-progress{height:3px;background:#eef1ec}.reading-progress div{height:100%;background:#7ea26c;width:0}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:13px 22px;border-radius:9px;background:#263e34;color:#fff;font-size:12px;z-index:100;max-width:90vw;box-shadow:0 8px 30px #0002}
@media(min-width:1550px){.main{padding:0 70px}}@media(max-width:1150px){.shell{grid-template-columns:205px minmax(0,1fr)}.main{padding:0 28px}.sidebar{padding:30px 16px}.subjects{gap:8px}.subject{padding:14px 10px}.subject strong{font-size:11px}}
@media(max-width:760px){.shell{display:block}.sidebar{position:static;height:auto;padding:18px 20px 0;border-right:0;border-bottom:1px solid var(--line)}.brand{font-size:15px}.brand-mark{width:35px;height:37px;font-size:23px}.brand small{font-size:7px;margin-top:4px}.nav-caption,.sidebar-note{display:none}nav{display:flex;gap:4px;margin-top:18px;justify-content:space-between}nav button{padding:12px 9px;font-size:11px;gap:6px;border-radius:7px 7px 0 0}nav button b{display:none}.main{padding:0 20px}.topbar{height:56px;font-size:8px}.topbar .slash{margin:0 8px}.quiet{font-size:11px;padding:9px}.intro{padding:28px 0 19px}h1{font-size:27px;letter-spacing:-1.5px}.intro p{font-size:12px}.continue{padding:23px 21px;min-height:155px;align-items:flex-start;flex-direction:column;gap:17px}.continue h2{font-size:18px}.continue button{align-self:flex-end;padding:10px 16px}.continue::after{right:20px;top:-45px}.subjects{display:flex;overflow-x:auto;padding:2px 2px 10px;scroll-snap-type:x proximity}.subject{min-width:137px;flex:1;scroll-snap-align:start;padding:15px}.subject strong{font-size:12px}.section-heading>span{font-size:10px}.section-heading{margin-top:25px}.list-toolbar{align-items:flex-start;flex-direction:column;gap:14px}.search{width:100%}.lesson{padding:16px 13px;gap:10px}.lesson-main a{font-size:13px}.chapter{font-size:18px;width:23px}.bookmark{min-width:35px}.lesson-meta{gap:7px}.materials{margin-top:22px}footer{gap:10px;flex-wrap:wrap}#updated{width:100%;margin:0}.reader-bar{padding:10px;gap:8px;flex-wrap:wrap}.reader-heading{width:calc(100% - 80px);flex:auto}.reader-heading strong{font-size:12px}.reader-bar>#reader-save{margin-left:auto}.reader-tools{gap:5px;justify-content:space-between}.reader-tools label{flex:1}.reader-tools select{width:100%;max-width:230px}.reader-tools .quiet{white-space:nowrap;padding:8px 5px;font-size:10px}}