:root{--ink:#202923;--muted:#68736b;--cream:#f8f7f2;--green:#315d47;--line:#e7e9e1;--orange:#e9a864}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--ink);font-family:'DM Sans',sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}.site-shell{max-width:1600px;margin:auto;overflow:hidden}.topbar{height:88px;display:flex;align-items:center;justify-content:space-between;padding:0 6.5%;border-bottom:1px solid #e9e9e2}.brand{display:flex;align-items:center;gap:10px;font-family:Outfit;font-size:26px;font-weight:800;letter-spacing:-1.5px}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border-radius:13px;background:var(--green);color:white;font-size:23px}.brand-mark span,.footer-brand span{color:#e7ac71}.brand small{display:block;font:700 8px 'DM Sans';letter-spacing:2px;color:#84928a;margin-top:-3px}.topbar nav{display:flex;gap:38px;font-size:13px;font-weight:700}.topbar nav a:hover,.about a:hover{color:#53856b}.top-cta{background:var(--ink);color:white;border-radius:30px;padding:14px 20px;font-size:12px;font-weight:700}.top-cta span{margin-left:14px}.hero{min-height:590px;display:grid;grid-template-columns:50% 50%;padding:80px 6.5% 55px;position:relative}.hero-copy{position:relative;z-index:2}.eyebrow,.section-kicker,.about-number{font-size:10px;font-weight:800;letter-spacing:2px;color:#53745e}.eyebrow{display:flex;align-items:center;gap:11px}.pulse{height:7px;width:7px;border-radius:50%;background:#77a888;box-shadow:0 0 0 4px #e4eee6}.eyebrow-line{width:24px;height:1px;background:#b9cbbd}.hero h1,.section-intro h2,.about h2{font-family:Outfit;font-weight:700;letter-spacing:-5px;line-height:1.05}.hero h1{font-size:clamp(64px,6.3vw,104px);margin:26px 0 22px}.hero h1 em,.section-intro h2 em,.about h2 em{font-style:normal;color:#6d9277}.hero-copy>p{max-width:435px;font-size:16px;line-height:1.8;color:var(--muted)}.hero-button{display:inline-flex;align-items:center;gap:40px;background:var(--green);color:#fff;border-radius:30px;padding:17px 21px;margin-top:25px;font-size:13px;font-weight:700;box-shadow:0 13px 24px #315d4726}.hero-button:hover,.top-cta:hover{transform:translateY(-2px)}.hero-proof{display:flex;align-items:center;gap:15px;margin-top:52px;font-size:11px;line-height:1.6;color:#78847a}.hero-proof strong{color:var(--ink)}.proof-icons{display:flex;padding-left:8px}.proof-icons span{display:grid;place-items:center;width:31px;height:31px;border-radius:50%;background:#e8eee5;border:2px solid var(--cream);margin-left:-8px;font-size:15px;color:var(--green)}.proof-icons span:nth-child(2){background:#f7e7d8;color:#a76137}.proof-icons span:nth-child(3){background:#e7e8f4;color:#696791}.hero-art{position:relative;min-height:480px}.orbit{position:absolute;border:1px solid #e6e8df;border-radius:50%;left:12%;top:-3%;width:540px;height:540px}.orbit-two{left:21%;top:7%;width:420px;height:420px}.paper{position:absolute;border-radius:10px;box-shadow:0 28px 50px #26362724}.paper-back{width:280px;height:355px;background:#e6e9df;transform:rotate(19deg);left:28%;top:22%;padding:32px;color:#8c9c8f;font-size:9px;letter-spacing:2px}.paper-line{height:7px;background:#d4ded3;margin-top:45px;border-radius:4px}.paper-line.short{width:60%;margin-top:14px}.paper-front{width:330px;height:430px;left:26%;top:9%;background:#fffdf8;transform:rotate(-10deg);padding:31px;display:flex;flex-direction:column;border:1px solid #eeeadf}.paper-top,.paper-bottom{display:flex;justify-content:space-between;font-size:10px;font-weight:800;letter-spacing:1.5px}.paper-top{color:#9daaa0}.paper-subject{color:#557c64;font-size:11px;letter-spacing:2px;font-weight:800;margin-top:45px}.paper-title{font:700 45px/1.08 Outfit;letter-spacing:-2px;margin-top:17px}.paper-formula{color:#9da99c;font:italic 18px Georgia;margin-top:35px}.paper-bottom{border-top:1px solid #e6ebe2;padding-top:18px;margin-top:auto;color:#466d50}.paper-bottom span{font-size:18px}.art-spark{position:absolute;color:#9ab3a0;font-size:36px;z-index:2}.spark-one{left:13%;top:18%}.spark-two{right:8%;bottom:22%;color:#edbb8c}.floating-badge{position:absolute;right:0;top:68%;background:#fff;border:1px solid #edf0e9;border-radius:30px;padding:13px 20px;box-shadow:0 10px 30px #2d44351a;font-size:12px;font-weight:700;transform:rotate(8deg)}.floating-badge span{color:#d5a46a;margin-right:6px}.stats-strip{margin:0 6.5%;display:grid;grid-template-columns:repeat(3,1fr) 1.1fr;border:1px solid var(--line);border-radius:18px;background:#fffdf9;overflow:hidden}.stats-strip>div{min-height:114px;display:flex;align-items:center;justify-content:center;gap:15px;border-right:1px solid var(--line)}.stats-strip strong{font:600 43px Outfit;letter-spacing:-2px;color:var(--green)}.stats-strip span{font-size:12px;line-height:1.45;color:var(--muted)}.stats-strip .stats-note{background:#eaf0e7;border:0;justify-content:space-around;font:600 17px/1.3 Outfit}.stats-note span{font-size:22px;color:var(--green)}.library{padding:100px 6.5% 115px}.section-intro{display:flex;align-items:end;justify-content:space-between;margin-bottom:42px}.section-intro h2,.about h2{font-size:clamp(46px,4.8vw,70px);margin:15px 0 0}.section-intro p{max-width:295px;font-size:14px;line-height:1.8;color:var(--muted);margin-bottom:5px}.filter-panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:0 16px 45px #273f2d08}.filter-top,.controls,.results-header{display:flex;align-items:center;justify-content:space-between}.filter-top{margin-bottom:25px}.filter-title{display:flex;gap:13px;align-items:center}.filter-icon{display:grid;place-items:center;width:38px;height:38px;background:#eaf0ea;color:var(--green);border-radius:11px;font-size:24px}.filter-title strong{display:block;font:700 16px Outfit}.filter-title small{font-size:11px;color:#93a098}.result-count{background:#edf4eb;color:#518063;border-radius:30px;padding:8px 13px;font-size:11px;font-weight:800}.controls{gap:15px}.segmented{display:flex;background:#f4f5f0;border-radius:10px;padding:4px}.segmented button{border:0;background:transparent;border-radius:8px;padding:11px 18px;color:#778279;font-size:12px;font-weight:700;cursor:pointer}.segmented button.active{background:var(--green);color:white;box-shadow:0 3px 9px #315d4723}.search-wrap{display:flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:10px;padding:0 13px;color:#9ba69d;height:42px;min-width:270px}.search-wrap span{font-size:23px}.search-wrap input{border:0;outline:0;width:100%;font-size:12px;background:transparent;color:var(--ink)}.chips,.year-row{display:flex;gap:8px;flex-wrap:wrap}.chips{margin-top:26px}.chip,.year-chip{border:1px solid var(--line);background:white;border-radius:25px;padding:9px 16px;color:#657168;font-size:11px;font-weight:700;cursor:pointer}.chip:hover,.year-chip:hover{border-color:#9ab39b}.chip.active{background:#e9f1e8;color:var(--green);border-color:#dcebdd}.year-row{margin-top:17px;padding-top:17px;border-top:1px solid var(--line)}.year-chip{border-radius:7px;padding:8px 13px}.year-chip.active{background:var(--ink);color:white;border-color:var(--ink)}.results-header{margin:43px 0 19px}.results-header>span:first-child{font:700 24px Outfit;letter-spacing:-1px}.results-header>span:last-child{font-size:9px;letter-spacing:1.7px;font-weight:800;color:#a3ada4}.tiny-arrow{font-size:16px;margin-left:9px;color:#638871}.paper-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.paper-card{min-height:235px;background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}.paper-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px #283e2d12}.card-top,.card-bottom{display:flex;align-items:center;justify-content:space-between}.subject-icon{width:36px;height:36px;display:grid;place-items:center;background:#e9f0ea;border-radius:10px;font:600 22px Outfit;color:#487058}.physics .subject-icon{background:#e9e9f3;color:#7776a4}.chemistry .subject-icon{background:#fbefe4;color:#bb8158}.year-pill{border:1px solid var(--line);padding:5px 8px;border-radius:6px;font-size:10px;font-weight:800;color:#87928a}.card-main{margin-top:25px}.card-kicker{font-size:9px;letter-spacing:1.4px;font-weight:800;color:#77917d}.physics .card-kicker{color:#8585ab}.chemistry .card-kicker{color:#bb936f}.card-main h3{font:700 25px Outfit;letter-spacing:-1px;margin:7px 0}.card-main p{font-size:11px;color:#929e95;margin:0}.card-bottom{border-top:1px solid #edf0e9;padding-top:13px;margin-top:auto;font-size:9px;letter-spacing:1.1px;font-weight:800;color:#87948b}.card-bottom a{display:grid;place-items:center;width:28px;height:28px;background:#e9f1e9;border-radius:8px;color:var(--green);font-size:18px}.card-bottom a:hover{background:var(--green);color:#fff}.unavailable{background:#fafaf7;border-style:dashed}.unavailable .card-bottom a{background:#f0f0eb;color:#8c968d}.empty-state{text-align:center;padding:70px 20px;background:white;border:1px dashed var(--line);border-radius:14px}.empty-state>span{font-size:45px;color:#8aaa91}.empty-state h3{font:700 26px Outfit;margin:12px 0 5px}.empty-state p{font-size:13px;color:var(--muted)}.about{position:relative;overflow:hidden;background:#e9f0e8;padding:65px 6.5% 75px;display:grid;grid-template-columns:25% 55% 20%}.about h2{margin-top:0}.about p{max-width:550px;line-height:1.8;font-size:14px;color:#61756a}.about a{display:inline-block;margin:15px 20px 0 0;font-size:12px;font-weight:800;color:var(--green)}.about-decoration{font-size:210px;color:#d4e4d2;line-height:1;text-align:center;transform:rotate(-14deg)}footer{padding:35px 6.5%;display:flex;justify-content:space-between;align-items:center;color:#929d93;font-size:11px}.footer-brand{font:800 24px Outfit;letter-spacing:-1px;color:var(--green)}@media(max-width:1000px){.paper-grid{grid-template-columns:repeat(3,1fr)}.hero{grid-template-columns:55% 45%}.hero h1{font-size:70px}.paper-front{left:10%;width:290px;height:390px}.paper-back{left:14%}.orbit{left:-22%}.orbit-two{left:-9%}}@media(max-width:700px){.topbar{height:70px;padding:0 5%}.topbar nav{display:none}.top-cta{padding:12px;font-size:10px}.top-cta span{margin-left:4px}.hero{padding:58px 5% 40px;display:block;min-height:auto}.hero h1{font-size:66px;letter-spacing:-4px}.hero-art{height:400px;min-height:0;margin-top:25px}.paper-front{left:19%;top:3%;width:250px;height:330px;padding:22px}.paper-title{font-size:34px}.paper-subject{margin-top:32px}.paper-formula{font-size:15px;margin-top:24px}.paper-back{left:20%;top:17%;width:220px;height:285px}.orbit{left:0;top:-7%;width:390px;height:390px}.orbit-two{left:10%;top:4%;width:300px;height:300px}.floating-badge{right:3%;top:72%}.hero-proof{margin-top:35px}.stats-strip{margin:0 5%;grid-template-columns:repeat(2,1fr)}.stats-strip>div{min-height:90px}.stats-strip strong{font-size:32px}.stats-strip .stats-note{font-size:14px}.library{padding:75px 5%}.section-intro{display:block}.section-intro h2,.about h2{font-size:49px;letter-spacing:-3px}.section-intro p{margin-top:22px}.filter-panel{padding:18px}.controls{display:block}.segmented{width:100%}.segmented button{flex:1;padding:10px 5px}.search-wrap{margin-top:13px;min-width:0}.result-count{font-size:9px}.paper-grid{grid-template-columns:repeat(2,1fr);gap:10px}.paper-card{min-height:220px;padding:13px}.card-main h3{font-size:22px}.card-main p{line-height:1.4}.results-header>span:last-child{display:none}.about{padding:55px 5%;display:block}.about-number{margin-bottom:20px}.about-decoration{display:none}footer{padding:30px 5%;gap:10px;flex-wrap:wrap}footer span:last-child{display:none}}@media(max-width:430px){.hero h1{font-size:56px}.paper-grid{grid-template-columns:1fr 1fr}.paper-card{min-height:205px}.card-main h3{font-size:19px}.card-kicker{font-size:8px}.paper-front{left:12%}.paper-back{left:14%}}