*{margin:0;padding:0;box-sizing:border-box;}body{background:linear-gradient(145deg,#f9f3e8 0%,#ffe9d6 100%);font-family:'Segoe UI','Quicksand',system-ui,-apple-system,BlinkMacSystemFont,'Helvetica Neue',sans-serif;padding:2rem 1.5rem 1rem;min-height:100vh;display:flex;flex-direction:column;align-items:center;color:#2d3e4f;}.course-wrapper{max-width:1300px;width:100%;background:rgba(255,248,240,0.7);backdrop-filter:blur(2px);border-radius:56px 56px 40px 40px;padding:2rem 2rem 1.5rem;box-shadow:0 20px 40px rgba(0,20,30,0.08),0 8px 20px rgba(255,215,175,0.3);border:1px solid rgba(255,235,215,0.6);}.header-title{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;margin-bottom:2rem;border-bottom:3px dashed #fbc4ab;padding-bottom:0.75rem;}.header-title h1{font-size:2.4rem;font-weight:700;letter-spacing:-0.3px;background:linear-gradient(135deg,#b47c5e,#d9a77c);-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:0 2px 5px rgba(180,124,94,0.15);display:inline-flex;align-items:center;gap:8px;}.header-title h1 small{font-size:1rem;font-weight:500;background:#f5d7c0;padding:0.2rem 1rem;border-radius:40px;color:#6b4d3a;letter-spacing:0.3px;margin-left:10px;}.header-tagline{font-size:1.1rem;background:#e7d2bd;padding:0.3rem 1.2rem;border-radius:30px;color:#4d3629;font-weight:500;box-shadow:inset 0 -2px 0 #dbbca5;}.catalogue-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;margin:1.2rem 0 1.8rem;}.chapter-card{background:#fffaf5;border-radius:28px;padding:0.9rem 1.2rem 0.9rem 1.2rem;box-shadow:0 6px 12px rgba(160,120,90,0.08),0 2px 4px rgba(0,0,0,0.02);transition:all 0.2s ease;border:1px solid #f7e3d4;display:flex;align-items:center;gap:12px;backdrop-filter:blur(2px);cursor:pointer;}.chapter-card:hover{transform:translateY(-3px);box-shadow:0 12px 24px rgba(190,140,110,0.15);border-color:#ecc6b0;background:#fffcf8;}.chapter-card:active{transform:scale(0.97);}.chapter-number{background:#fad5c0;min-width:44px;height:44px;border-radius:40px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem;color:#5f3f2e;box-shadow:inset 0 -3px 0 #e7b99f;padding:0 6px;flex-shrink:0;background:linear-gradient(145deg,#fad5c0,#f5c8b0);}.chapter-content{flex:1;min-width:0;}.chapter-title{font-weight:700;font-size:1.04rem;color:#2d3e4f;line-height:1.3;display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 8px;}.chapter-title .main-title{color:#3d2c20;}.chapter-sub{display:block;font-weight:400;font-size:0.8rem;color:#7a624f;margin-top:3px;line-height:1.3;opacity:0.9;letter-spacing:0.2px;border-left:3px solid #f5cfbb;padding-left:8px;}.chapter-link{text-decoration:none;color:inherit;display:flex;align-items:center;gap:12px;width:100%;}.chapter-card:nth-child(6n+1) .chapter-number{background:#fce2ce;color:#5f3f2e;}.chapter-card:nth-child(6n+2) .chapter-number{background:#d9e6d5;color:#2f543a;}.chapter-card:nth-child(6n+3) .chapter-number{background:#f7dbd0;color:#6b3f33;}.chapter-card:nth-child(6n+4) .chapter-number{background:#cbe0e8;color:#1f4a5c;}.chapter-card:nth-child(6n+5) .chapter-number{background:#f5d9c8;color:#5f3f2e;}.chapter-card:nth-child(6n+6) .chapter-number{background:#e8d5c8;color:#4d3629;}.footer-area{margin-top:1.2rem;text-align:center;font-size:1rem;font-weight:500;color:#7b5f4b;border-top:2px dotted #e7cfbc;padding-top:1.2rem;letter-spacing:1px;background:transparent;}.footer-area span{background:#f5dfd0;padding:0.2rem 2rem;border-radius:40px;display:inline-block;box-shadow:inset 0 -2px 0 #ddc2b0;}@media (max-width:640px){body{padding:1rem 0.8rem;}.course-wrapper{padding:1.5rem 1rem;border-radius:40px;}.header-title{flex-direction:column;align-items:flex-start;gap:6px;}.header-title h1{font-size:1.9rem;}.catalogue-grid{grid-template-columns:1fr;gap:12px;}.chapter-card{padding:0.7rem 0.9rem;}.chapter-number{min-width:38px;height:38px;font-size:1rem;}}@media (min-width:900px){.catalogue-grid{grid-template-columns:repeat(2,1fr);}}@media (min-width:1200px){.catalogue-grid{grid-template-columns:repeat(3,1fr);}}.chapter-card a{text-decoration:none;color:inherit;}.chapter-card a:visited{color:inherit;}