:root{--green:#123f37;--green-2:#0b2e28;--mint:#e5f1e8;--cream:#fbf7ed;--yellow:#f4b942;--orange:#e97842;--ink:#17312c;--muted:#65736f;--line:#d9e2dd;--white:#fff;--shadow:0 18px 45px rgba(18,63,55,.1)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--ink);font-family:Tahoma,Arial,sans-serif;line-height:1.75}button,input,select{font:inherit}button,a{touch-action:manipulation}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header{height:82px;display:flex;align-items:center;justify-content:space-between;padding:0 max(5vw,24px);background:var(--cream);border-bottom:1px solid rgba(18,63,55,.1)}.brand{display:flex;align-items:center;gap:11px;color:var(--green);text-decoration:none;font-size:1.08rem;font-weight:900}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--yellow);font-size:1.3rem;box-shadow:inset 0 -3px 0 rgba(0,0,0,.08)}.about-link{color:var(--green);font-weight:700;text-decoration:none;border-bottom:2px solid var(--yellow)}main{overflow:hidden}.intro{min-height:410px;padding:64px max(7vw,28px) 78px;display:flex;align-items:center;justify-content:space-between;gap:40px;background:var(--green);color:white;position:relative}.intro:before{content:"";position:absolute;width:310px;height:310px;border:1px solid rgba(255,255,255,.12);border-radius:50%;left:-90px;top:-120px}.eyebrow{margin:0 0 10px;color:var(--orange);font-size:.9rem;font-weight:900;letter-spacing:.02em}.intro .eyebrow{color:var(--yellow)}h1{font-size:clamp(2.55rem,6vw,5.4rem);line-height:1.35;margin:0;font-weight:950;letter-spacing:-.045em}.intro h1 em{font-style:normal;color:var(--yellow)}.intro-copy{font-size:1.1rem;max-width:620px;color:#d8e6e2;margin:18px 0 0}.book-stack{width:320px;height:245px;position:relative;flex:none;transform:rotate(-3deg)}.book{position:absolute;left:0;width:280px;height:68px;border-radius:8px 16px 16px 8px;display:flex;align-items:center;padding-right:35px;color:var(--green);font-size:1.25rem;font-weight:900;box-shadow:0 13px 0 rgba(0,0,0,.16)}.book:after{content:"";position:absolute;right:14px;top:0;width:5px;height:100%;background:rgba(255,255,255,.35)}.b1{top:150px;background:#e77742;transform:rotate(-2deg)}.b2{top:77px;background:#f7e2a6;transform:rotate(2deg)}.b3{top:3px;background:#f4b942;transform:rotate(-1deg)}.library{max-width:1180px;margin:-36px auto 0;padding:0 24px 80px;position:relative}.search-wrap{height:76px;background:white;border-radius:18px;box-shadow:var(--shadow);display:flex;align-items:center;padding:0 22px;gap:15px;border:1px solid rgba(18,63,55,.08)}.search-wrap svg{width:25px;fill:none;stroke:var(--green);stroke-width:1.8}.search-wrap input{border:0;outline:0;min-width:0;flex:1;font-size:1rem;color:var(--ink);background:transparent}.search-wrap input::placeholder{color:#88938f}.search-wrap:focus-within{outline:3px solid rgba(244,185,66,.55)}kbd{font-family:inherit;font-size:.76rem;color:var(--muted);background:#f1f4f2;border:1px solid var(--line);border-radius:7px;padding:5px 9px}.level-tabs{display:flex;gap:8px;margin:34px 0 20px;overflow:auto;padding-bottom:4px}.level-tabs button,.reset{border:0;cursor:pointer}.level-tabs button{white-space:nowrap;padding:10px 17px;border-radius:999px;background:transparent;color:var(--muted);font-weight:800}.level-tabs button:hover{background:var(--mint)}.level-tabs button.active{background:var(--green);color:white}.filters{display:grid;grid-template-columns:repeat(2,minmax(0,240px));gap:14px;margin-bottom:42px}.filters label{font-size:.82rem;font-weight:800;color:var(--muted)}select{display:block;width:100%;margin-top:6px;padding:11px 13px;border-radius:11px;border:1px solid var(--line);background:white;color:var(--ink);outline:none}.result-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:20px}.result-heading h2,.guide h2{font-size:clamp(1.6rem,3vw,2.4rem);margin:0;line-height:1.4}.result-heading p{margin:4px 0 0;color:var(--muted);font-size:.88rem}.reset{background:transparent;color:var(--green);font-weight:800;padding:7px 0;border-bottom:1px solid var(--green)}.book-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card{background:white;border:1px solid var(--line);border-radius:16px;padding:18px;display:flex;gap:15px;min-height:146px;transition:.2s ease}.card:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(18,63,55,.09);border-color:#b8cdc5}.cover{width:70px;height:96px;border-radius:5px 10px 10px 5px;padding:12px 8px;color:white;flex:none;display:flex;align-items:flex-end;font-size:.72rem;font-weight:900;line-height:1.5;box-shadow:3px 5px 0 #dce6e1;position:relative;overflow:hidden}.cover:before{content:"";position:absolute;inset:0;border-right:5px solid rgba(255,255,255,.22)}.card:nth-child(4n+1) .cover{background:#307c6c}.card:nth-child(4n+2) .cover{background:#e97842}.card:nth-child(4n+3) .cover{background:#365f87}.card:nth-child(4n) .cover{background:#926b9d}.card-body{min-width:0;display:flex;flex-direction:column}.card h3{font-size:1rem;line-height:1.6;margin:1px 0 5px}.meta{font-size:.75rem;color:var(--muted);margin:0}.card a{margin-top:auto;color:var(--green);font-weight:900;font-size:.82rem;text-decoration:none}.card a:hover{text-decoration:underline}.empty{text-align:center;background:white;border:1px dashed #b7c9c2;border-radius:18px;padding:48px}.empty span{font-size:3rem}.empty h3{margin:7px 0}.empty p{margin:0;color:var(--muted)}.guide{background:var(--mint);padding:75px max(7vw,28px);display:grid;grid-template-columns:.75fr 1.25fr;column-gap:60px}.guide .eyebrow,.guide h2{grid-column:1}.guide ol{grid-column:2;grid-row:1/3;list-style:none;margin:0;padding:0}.guide li{display:flex;align-items:center;gap:18px;padding:19px 0;border-bottom:1px solid #bfd2c8}.guide li:first-child{padding-top:0}.guide strong{width:45px;height:45px;display:grid;place-items:center;border-radius:50%;background:var(--yellow);color:var(--green)}.guide span{display:flex;flex-direction:column}.guide b{font-size:1rem}.guide small{font-size:.83rem;color:var(--muted)}footer{padding:45px max(5vw,24px);background:var(--green-2);color:white;display:grid;grid-template-columns:1fr auto;align-items:center;gap:10px}footer .brand{color:white}footer p{margin:0;color:#c2d1cd;font-size:.82rem;text-align:left}.source-note{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.12);padding-top:20px;margin-top:12px!important}@media(max-width:850px){.intro{min-height:360px}.book-stack{display:none}.book-grid{grid-template-columns:repeat(2,1fr)}.guide{grid-template-columns:1fr}.guide .eyebrow,.guide h2,.guide ol{grid-column:1;grid-row:auto}.guide ol{margin-top:28px}}@media(max-width:560px){.site-header{height:68px}.about-link{font-size:.83rem}.intro{padding:52px 24px 68px}.intro-copy{font-size:1rem}.library{padding-inline:15px}.search-wrap{height:66px;padding:0 15px}.search-wrap kbd{display:none}.level-tabs{margin-top:25px}.filters{grid-template-columns:1fr 1fr}.book-grid{grid-template-columns:1fr}.card{min-height:132px}.result-heading{align-items:center}.guide{padding:58px 24px}footer{grid-template-columns:1fr}footer p{text-align:right}}