*{box-sizing:border-box}body{margin:0;background:#f3f6f7;color:#18333b;font:16px/1.7 'Segoe UI',Tahoma,sans-serif}aside{position:fixed;inset:0 0 0 auto;width:250px;background:#123e45;color:#fff;padding:36px 25px;display:flex;flex-direction:column;gap:20px}.brand{font-size:29px;font-weight:750;direction:ltr}aside p{color:#bed8d7}aside small{margin-top:auto;color:#bed8d7}nav{display:grid;gap:10px}nav button{background:transparent;color:#e8f4f3;text-align:right;border:1px solid #457078}main{margin-right:250px;padding:30px 5%;max-width:1600px}header{display:flex;justify-content:space-between;color:#65818a;font-size:12px;letter-spacing:1px;margin-bottom:36px}h1{font-size:36px;line-height:1.4;margin:0 0 12px}h2{margin:0 0 15px}p{color:#61757b}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}.card{background:white;border:1px solid #dce6e7;border-radius:18px;padding:26px;margin:18px 0;box-shadow:0 4px 14px #193e4505}.hero{background:#deeeeb;border:0;padding:34px}.tag{color:#177e75;font-size:13px;font-weight:bold}.stat{font-size:36px;font-weight:700;color:#157a71}button{border:0;border-radius:9px;background:#157a71;color:white;padding:12px 18px;cursor:pointer;font:inherit;margin:4px}button:hover{filter:brightness(.94)}button:disabled{opacity:.5;cursor:default}.secondary{background:#e3eeed;color:#234b50}input,textarea,select{width:100%;border:1px solid #c8d9da;border-radius:9px;padding:12px;margin:6px 0 14px;font:inherit;background:white;color:#18333b}textarea{min-height:110px}label{display:block}#notice{color:#9d3030;white-space:pre-wrap}#notice:not(:empty){padding:16px;background:#fff1e9;border-radius:10px;margin-bottom:15px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.option{display:block;width:100%;background:#f4f7f7;color:#18333b;text-align:left;border:1px solid #d4e2e2}.option.selected{background:#cce7e1;border-color:#157a71}.question{direction:ltr;text-align:left;font-size:21px}.muted{font-size:13px;color:#72898f}.correct{color:#138170}.wrong{color:#b04141}a{color:#11756c}table{width:100%;border-collapse:collapse}td,th{text-align:right;padding:12px;border-bottom:1px solid #e1e9e9}details{margin:14px 0}pre{white-space:pre-wrap}img{max-width:100%}@media(max-width:800px){aside{position:static;width:100%;padding:20px}aside small,aside p{display:none}nav{display:flex;flex-wrap:wrap}main{margin:0;padding:24px}h1{font-size:28px}header{letter-spacing:0}}
 .option.answer-correct,.option.answer-correct:disabled{background:#dbf3e4;border:2px solid #21834a;color:#145c32;opacity:1}.option.answer-wrong,.option.answer-wrong:disabled{background:#fce7e7;border-color:#cd8888;color:#923434;opacity:1}.option span{font-size:14px;margin-inline-start:12px}[hidden]{display:none!important}
#explanation p{font-size:22px;line-height:1.85;color:#24434b;font-weight:500;margin:24px 0;text-align:left}.difficulty{display:flex;gap:8px;margin:20px 0}.difficulty button{min-width:90px}.difficulty .difficulty-selected{background:#157a71;color:white;outline:2px solid #0d5c55;outline-offset:2px}.option span{display:inline-block;direction:ltr}
.option{direction:ltr}
.answer-label{display:inline-block;font-size:14px;font-weight:750;margin-inline-start:12px;padding:2px 9px;border:1px solid currentColor;border-radius:6px;direction:ltr;background:#ffffff70}
body{background:#f5f7fb;color:#192f46}aside{background:#112c40;width:260px;padding:32px 24px}.brand{letter-spacing:-1px}.brand-ar{font-size:20px;color:#8fcec5;margin-top:-16px}aside>p{font-size:13px;margin-top:-15px}nav{gap:6px}nav button{padding:11px 16px;border-color:transparent;border-radius:12px}nav button:hover,nav button:focus-visible{background:#22465b;border-color:#5b9b9c}nav button small{display:block;margin:0;color:#90b4c2;font-size:11px;letter-spacing:.5px;direction:ltr;text-align:right}main{margin-right:260px;padding:32px 5%}header{padding-bottom:20px;border-bottom:1px solid #dce4ec;margin-bottom:30px}.card{border-radius:20px;padding:28px;border-color:#e0e7ef;box-shadow:0 8px 28px #162d4205}.hero{position:relative;overflow:hidden;background:linear-gradient(125deg,#e0eeec,#edf4f9);padding:40px;border:1px solid #d3e5e5}.hero h1{font-size:40px;letter-spacing:-1px;margin:12px 0 18px}.hero-english{color:#476774;font-size:17px;text-align:right}.hero p{max-width:600px}.tag{font-size:11px;letter-spacing:1px;color:#25776f}.grid{gap:24px}.grid .card{margin:12px 0 24px}.book-icon{width:52px;height:60px;display:grid;place-items:center;background:#e3efef;color:#16776d;border-radius:8px 14px 14px 8px;border-right:5px solid #218d80;font-size:26px;margin:18px 0}.book-english{font-size:14px;color:#6f8193;text-align:right;margin-top:-6px;margin-bottom:16px}.grid h2{font-size:22px}.progress-track progress{width:100%;height:7px;accent-color:#218a7d;display:block}.progress-track{margin-top:22px}.grid .muted{margin-top:8px}button{font-weight:600;transition:background .15s,box-shadow .15s}button:focus-visible{outline:3px solid #79beb5;outline-offset:3px}.secondary{background:#eaf0f5;color:#2c4a62}input[type=checkbox]{width:auto;margin-inline-end:8px}.stat{color:#197d73}#explanation p{color:#213d52}@media(max-width:800px){aside{width:100%;padding:20px}.brand-ar{margin-top:-12px}main{margin:0;padding:22px}nav button small{display:none}nav{gap:3px}.hero{padding:26px}.hero h1{font-size:32px}.hero-english{font-size:14px}header{font-size:10px;gap:12px;flex-wrap:wrap}.card{padding:22px}}
.subjects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:24px;margin-top:32px}.subject-card{overflow:hidden;border:1px solid #dce5ed;background:white;border-radius:20px}.subject-cover{width:100%;height:190px;object-fit:cover;display:block}.subject-body{padding:26px}.subject-body h2{margin:10px 0 4px}.subject-english{margin:0 0 22px;text-align:right;font-size:14px}.subject-price{border-top:1px solid #e1e8ef;padding:20px 0;display:grid;gap:4px}.subject-price span,.subject-price small{color:#62778b;font-size:13px}.subject-price strong{font-size:27px;color:#153f52}.subject-open{width:100%;margin:0}.subject-heading{display:flex;align-items:center;gap:26px;margin:28px 0}.subject-heading img{width:180px;height:125px;object-fit:cover;border-radius:16px}.subject-heading h1{font-size:30px}.subject-heading p{margin:6px 0;text-align:right}.bundle-panel{display:flex;justify-content:space-between;gap:28px;align-items:center;background:#e3eeec;border:1px solid #c9ded9;padding:28px;border-radius:18px;margin:24px 0 36px}.bundle-panel h2{margin:8px 0}.bundle-panel p{margin:8px 0}.bundle-panel small{color:#56776f}.bundle-purchase{display:grid;gap:6px;min-width:240px}.bundle-purchase strong{font-size:30px}.bundle-purchase button{margin:8px 0}.books-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:20px 0}.books-heading h2{margin:0}.book-list{display:grid;gap:18px}.book-row{display:flex;gap:22px;align-items:center;padding:26px;border-radius:16px;background:white;border:1px solid #dce5ed}.book-number{display:grid;place-items:center;width:56px;height:74px;flex-shrink:0;background:#e5eef2;color:#327080;border-radius:8px;font-size:24px;font-weight:700}.book-info{flex:1}.book-info h2{font-size:21px;margin-bottom:8px}.book-info progress{width:100%;height:6px;accent-color:#177e71}.book-purchase{display:grid;gap:5px;min-width:210px;border-right:1px solid #e0e8ed;padding-right:24px}.book-purchase strong{font-size:23px}.book-purchase small{color:#687e90;font-size:12px}.book-purchase button{margin:4px 0}@media(max-width:800px){.subject-heading{align-items:flex-start;gap:16px}.subject-heading img{width:95px;height:100px}.subject-heading h1{font-size:24px}.bundle-panel,.book-row{flex-direction:column;align-items:stretch}.bundle-purchase{min-width:0}.book-purchase{border-right:0;border-top:1px solid #e0e8ed;padding:18px 0 0}.book-number{display:none}.subjects-grid{grid-template-columns:1fr}}
.preview-cover{height:180px;background:linear-gradient(135deg,#123d50,#318d88);display:flex;align-items:center;justify-content:center;gap:18px;flex-direction:column;color:#e0f4f0;font-size:19px;letter-spacing:1px}.cover-symbol{font-size:56px;line-height:1}.preview-surgery{background:linear-gradient(135deg,#183b63,#437d9c)}.preview-gynae{background:linear-gradient(135deg,#593d68,#a37399)}.preview-pediatrics{background:linear-gradient(135deg,#38696a,#75a69a)}.preview-book-title{text-align:left;font-size:21px;line-height:1.6}
.news-bar{background:#163d51;color:#f2fbfa;border-radius:14px;padding:16px 22px;display:flex;justify-content:space-between;align-items:center;gap:18px}.news-bar>div:first-child{display:flex;align-items:center;gap:16px}.news-bar p{color:inherit;margin:0;font-size:14px}.news-badge{background:#a8e1ce;color:#154d43;padding:5px 10px;border-radius:6px;font-size:11px;white-space:nowrap}.news-controls{display:flex;flex-shrink:0}.news-controls button{font-size:12px;padding:8px 12px}.welcome-hero{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:320px}.welcome-copy{flex:1;z-index:1}.welcome-title{animation:welcome-in .9s ease both}.welcome-title span{color:#147e71;display:inline-block;animation:welcome-in .9s .2s ease both}.welcome-art{position:relative;min-width:180px;height:220px;display:grid;place-items:center;color:#237c77}.art-core{font-size:76px;animation:breathe 4s ease-in-out infinite}.orbit{position:absolute;border:1px solid #79b3ae60;width:170px;height:170px;border-radius:50%}.orbit-two{width:210px;height:210px;border-style:dashed;animation:orbit-turn 50s linear infinite}.art-label{position:absolute;bottom:0;font-size:9px;letter-spacing:2px}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:34px 0 14px}.section-heading h2{margin:5px 0}.home-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.home-stats .card{margin:0;padding:22px}.home-stats .stat{font-size:32px;margin:8px 0}.stat-icon{color:#2b8b7e;background:#e4f1ec;padding:2px 8px;border-radius:7px}.home-stats p{margin-bottom:0;font-size:12px}.journey-panel{display:flex;gap:24px;justify-content:space-between;align-items:center}.journey-panel>div{flex:1}.journey-panel progress{width:100%;height:9px;accent-color:#1a8878}.journey-panel h2{margin:8px 0}.home-branches{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.branch-shortcut{background:white;color:#24495d;border:1px solid #d9e5eb;text-align:right;display:grid;grid-template-columns:1fr auto;padding:20px;margin:0}.branch-shortcut small{grid-row:2;color:#718494;font-size:12px}.branch-shortcut>span:last-child{grid-column:2;grid-row:1/3;align-self:center}.community-panel{margin-top:30px}.community-panel h2{margin:8px 0}.community-empty{background:#f4f7fa;border:1px dashed #c9d8df;border-radius:12px;padding:24px;display:grid;gap:6px}.community-empty span{font-size:13px;color:#6c8190}@keyframes welcome-in{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes breathe{50%{transform:scale(1.08)}}@keyframes orbit-turn{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){.welcome-title,.welcome-title span,.art-core,.orbit-two{animation:none}}@media(max-width:1050px){.home-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.welcome-art{display:none}}@media(max-width:700px){.news-bar,.news-bar>div:first-child,.journey-panel{align-items:stretch;flex-direction:column}.news-bar>div:first-child{gap:8px}.news-badge{align-self:flex-start}.home-branches{grid-template-columns:1fr}.home-stats{gap:10px}.home-stats .card{padding:16px}.home-stats .stat{font-size:27px}}
.contact-link{display:inline-block;padding:12px 18px;background:#157a71;color:white;border-radius:9px;text-decoration:none;font-weight:600}#subscription-message{min-height:170px}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px}.admin-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-top:24px}.cover-preview{max-height:160px;max-width:260px;border-radius:12px}.book-thumb{width:60px;height:80px;object-fit:cover;border-radius:8px;flex-shrink:0}.admin-intro{background:#e4efec}@media(max-width:700px){.form-grid{grid-template-columns:1fr}}
.search-picker{border:1px solid #d6e2e8;border-radius:12px;padding:14px;background:#f8fafc;margin:6px 0 20px}.search-picker input{margin-bottom:8px}.picker-selected{padding:9px 12px;border-radius:8px;background:#e1efeb;color:#195e53;font-size:13px;margin:6px 0 12px;overflow-wrap:anywhere}.picker-results{max-height:220px;overflow:auto;display:grid;gap:5px}.picker-result{margin:0;background:white;color:#23485b;text-align:right;border:1px solid #dce6eb;font-weight:400;font-size:14px;padding:9px 12px;overflow-wrap:anywhere}.picker-result:focus-visible,.picker-result:hover{background:#e4f1ed}.search-picker .muted{margin:9px 0;font-size:12px}
.question-result{display:flex;align-items:center;gap:18px;justify-content:space-between;border-bottom:1px solid #dce5eb;padding:12px 0}.question-result span{overflow-wrap:anywhere}.question-result button{flex-shrink:0}#import-preview{max-height:420px;overflow:auto;padding:8px}#import-preview:not(:empty){border:1px solid #d4e3e7;border-radius:12px;margin:18px 0}
.verification-card{max-width:650px;margin:30px auto}#otp-code{font-size:28px;font-weight:700;letter-spacing:12px;text-align:center}
#environment-notice{background:#fff2cd;color:#71510c;border:1px solid #ebd493;border-radius:10px;padding:13px 18px;margin-bottom:22px;font-size:13px;font-weight:600}
.formula-display{background:#edf4f6;border:1px solid #d5e5e9;border-radius:12px;padding:20px;margin-bottom:26px;font-size:18px;line-height:1.9;text-align:center}.calculator-result{display:grid;gap:4px;padding:24px;background:#e0f2e9;color:#185a4b;border-radius:14px;margin-top:22px}.calculator-result strong{font-size:46px;font-weight:750}.calculator-result small{font-size:12px}.coming-soon-cover{background:linear-gradient(135deg,#798999,#aab7c3)}.coming-soon-card .subject-open{background:#e3e9ee;color:#63788a;opacity:1}.calculator-card{max-width:900px}