:root{--navy:#071735;--muted:#344d70;--blue:#1677f8;--border:#d9e3ef;--soft:#eef6ff;--success:#54ce59;--success-bg:#effbf2;--warning-bg:#fff9eb}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f8fbff;color:var(--navy);font:14px Inter,Arial,Helvetica,sans-serif;line-height:1.35}button,input,select{font:inherit;color:inherit}button{cursor:pointer}.site-header{height:53px;background:#fff;border-bottom:1px solid #e7eef5;box-shadow:0 1px 6px #dce8f333}.header-inner{width:calc(100% - 88px);max-width:936px;height:100%;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{color:var(--navy);font-size:18px;font-weight:700;text-decoration:none;white-space:nowrap;display:flex;align-items:center;gap:16px}.monitor-icon{width:28px;height:21px;border:2px solid var(--navy);border-radius:1px;position:relative}.monitor-icon:after{content:"";position:absolute;width:12px;height:2px;background:var(--navy);left:6px;bottom:-6px;box-shadow:4px 3px 0 -0.2px var(--navy)}nav{display:flex;gap:28px;align-self:stretch;align-items:center}nav a{font-size:13px;color:var(--navy);text-decoration:none;display:flex;align-items:center;position:relative;white-space:nowrap}nav a.active:after{content:"";height:2px;background:var(--blue);position:absolute;bottom:0;left:0;right:0}.language-select select{border:1px solid var(--border);background:#fff;border-radius:6px;padding:6px;max-width:132px}.page-shell{width:calc(100% - 44px);max-width:980px;margin:auto}.hero{text-align:center;padding:27px 0 24px}.hero h1{font-size:34px;line-height:1.15;letter-spacing:-.8px;margin:0 0 7px}.hero p{font-size:17px;line-height:1.35;color:#3b5274;margin:0}.card{background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:0 4px 18px rgba(20,55,95,.05)}h2{font-size:18px;line-height:1.2;margin:0;font-weight:700;display:flex;align-items:center;gap:10px}.badge{width:27px;height:27px;display:inline-grid;place-items:center;border-radius:50%;background:var(--blue);color:#fff;font-size:16px;font-weight:600;flex:none}.top-grid{display:grid;grid-template-columns:35.2% 1fr;gap:14px}.specs-card{padding:13px 21px 25px}.specs-card h2{margin-bottom:21px}.specs-card label{display:block;font-weight:600;margin-top:15px}.input-unit,.split-input{display:flex;width:100%;height:37px;margin-top:4px;border:1px solid #d4dfec;border-radius:7px;overflow:hidden;background:#fff;font-weight:400}.input-unit input,.split-input input{border:0;min-width:0;flex:1;padding:0 12px;outline:none}.input-unit>span{padding:8px 10px;border-left:1px solid #e1e9f2}.input-unit select,.split-input select{border:0;border-left:1px solid #dce6f0;min-width:86px;padding:0 11px;background:#fff}.split-input{gap:8px;border:0;overflow:visible}.split-input input,.split-input select{border:1px solid #d4dfec;border-radius:7px;background:#fff}.split-input select{width:87px;flex:none}.primary-button{border:0;border-radius:7px;background:linear-gradient(110deg,#1677f8,#287ff5);color:#fff;height:44px;font-size:15px;font-weight:600;width:100%;margin-top:18px}.primary-button span{font-size:20px;vertical-align:-2px;margin-right:10px}.error{color:#c31f42;min-height:0;margin:0;font-weight:600}.error:not(:empty){padding-top:9px}.results-card{overflow:hidden}.results-header{height:47px;background:linear-gradient(90deg,#fff 10%,#edf7ff 65%,#e9f5ff);display:flex;align-items:center;padding:0 22px 0 16px;justify-content:space-between}.header-actions{display:flex;gap:12px}.text-button{border:0;background:none;color:#096cf0;font-size:13px;padding:4px}.results-body{display:grid;grid-template-columns:52% 48%;padding:16px;gap:15px}.primary-result{display:grid;gap:18px}.ppi-panel{background:linear-gradient(125deg,#e9f4ff,#eef8ff);border-radius:8px;padding:21px 24px;height:175px}.result-label{font-weight:700;font-size:16px;margin:0;display:flex;align-items:center;gap:12px}.result-icon{width:30px;height:30px;background:#197bf5;border-radius:50%;display:grid;place-items:center;color:#fff}.ppi-panel p:nth-child(2){margin:12px 0 5px;white-space:nowrap}.ppi-number{font-size:62px;line-height:1;color:#1477f8;letter-spacing:-2px}.ppi-unit{font-size:28px;margin-left:7px}.ppi-panel>span{font-size:14px;color:var(--muted)}.success-panel{display:flex;align-items:flex-start;gap:12px;background:linear-gradient(120deg,#effbf2,#f3fcf6);border-radius:8px;padding:17px 16px;color:#142333;min-height:99px}.success-panel p{margin:1px 0}.success-panel b{display:block;font-size:14px;line-height:1.3}.success-panel p span{display:block;color:var(--muted);margin-top:9px;font-size:13px}.check{background:var(--success);color:#fff;border-radius:50%;width:26px;height:26px;flex:none;text-align:center;font-size:19px;line-height:26px}.metrics{margin:0;padding:0;display:grid;align-content:space-between}.metrics div{display:grid;grid-template-columns:43px 1fr;min-height:44px}.metrics dt{font-size:27px;font-weight:400;line-height:1.1}.metrics dt span{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.metrics dd{margin:0;color:var(--muted);font-size:16px}.metrics dd:before{display:block;color:var(--muted);font-size:13px;font-weight:400}.metrics div:nth-child(1) dd:before{content:var(--metric-width-label,'Physical Width')}.metrics div:nth-child(2) dd:before{content:var(--metric-height-label,'Physical Height')}.metrics div:nth-child(3) dd:before{content:var(--metric-diagonal-label,'Diagonal Size')}.metrics div:nth-child(4) dd:before{content:var(--metric-aspect-label,'Aspect Ratio')}.metrics div:nth-child(5) dd:before{content:var(--metric-pitch-label,'Pixel Pitch')}.metrics div:nth-child(6) dd:before{content:var(--metric-area-label,'Screen Area')}.metrics b{color:var(--navy)}.second-grid{display:grid;grid-template-columns:55% 1fr;gap:14px;margin-top:14px}.visual-card,.distance-card{padding:13px 21px 18px;min-height:370px}.display-visual{margin-top:8px;text-align:center}.width-line{height:39px;display:grid;grid-template-columns:1fr auto 1.2fr auto;align-items:center;gap:9px}.width-line:before,.width-line:after{content:"";height:1px;background:var(--navy);display:block}.width-line span{font-size:19px}.width-line b{grid-column:2}.width-line small{position:absolute;margin:30px 0 0 calc(50% - 70px)}.display-stage{display:flex;align-items:center;gap:12px;margin-top:10px}.height-line{width:67px;display:flex;flex-direction:column;gap:4px}.height-line span{font-size:28px}.height-line small{font-size:12px}.screen-frame{flex:1;background:#0b1118;border:7px solid #101920;border-radius:8px 8px 3px 3px;padding:3px;aspect-ratio:1.6;box-shadow:0 4px 8px #001a2a88}.screen-scene{height:100%;position:relative;overflow:hidden;background:linear-gradient(150deg,#76b5dc 0%,#a3d4ed 26%,#e7b59b 49%,#174d67 50%,#0d293b 72%,#092433 100%)}.screen-scene:after{content:"";position:absolute;bottom:30%;left:0;right:0;height:10px;background:#1b5870aa;box-shadow:0 17px 0 #0b344955}.screen-scene i{position:absolute;bottom:27%;left:39%;width:0;height:0;border-left:46px solid transparent;border-right:42px solid transparent;border-bottom:80px solid #315d70;filter:drop-shadow(0 0 10px #fff5)}.diagonal-line{position:absolute;left:0;bottom:0;width:120%;height:1px;background:#fff;transform:rotate(-31deg);transform-origin:left bottom}.diagonal-label{position:absolute;left:44%;top:48%;padding:6px 10px;border-radius:7px;background:#10263b;color:#fff;font-weight:700}.base{height:12px;margin:0 5px;background:linear-gradient(#aeb5b9,#333b3e 35%,#d9ddde 45%,#35393a 60%,#111);border-radius:0 0 50% 50%;transform:perspective(80px) rotateX(-25deg)}.distance-card{padding-left:17px;padding-right:17px}.distance-control{margin-top:14px;background:linear-gradient(90deg,#f2f8fe,#fafcff);min-height:68px;padding:14px 12px;display:grid;grid-template-columns:45px 1fr 80px 83px;align-items:center;gap:8px}.eye{font-size:28px;color:#1677f8}.distance-control input,.distance-control select{height:37px;border:1px solid #d4dfec;border-radius:7px;background:#fff;padding:0 10px;min-width:0}.distance-message{margin-top:13px;min-height:99px}.distance-chart{margin-top:12px;position:relative;padding-top:35px}.chart-zones{height:44px;display:flex;justify-content:space-between;padding:8px 12px;font-size:11px;background:linear-gradient(90deg,#fff0f3 0 43%,#f4f7f9 48%,#effbf2 60%);color:#e61940}.chart-zones span:last-child{text-align:right;color:#11772e}.chart-line{position:absolute;top:78px;left:12px;right:12px;height:3px;background:linear-gradient(90deg,#fa8ba0,#dfe7eb,#65ce7c);border-radius:2px}.chart-line i{position:absolute;width:15px;height:15px;border-radius:50%;top:-6px}.chart-line i:before{content:"";position:absolute;width:2px;height:11px;top:-11px;left:7px;background:currentColor}.chart-line i:first-child{background:#ef526e;color:#ef526e;left:31%}.chart-line i:last-child{background:#2378e7;color:#2378e7;left:60%}.chart-labels{display:flex;justify-content:space-around;text-align:center;color:var(--muted);margin-top:19px;font-size:12px}.chart-labels b{color:var(--navy);font-size:14px}.converter-card{padding:13px 21px 17px;margin-top:14px}.converter-grid{display:grid;grid-template-columns:64% 36%;margin-top:14px}.tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:2px}.tabs button{height:38px;border:0;background:#f0f5fa;color:var(--muted);font-size:13px}.tabs button:first-child{border-radius:7px 0 0 7px}.tabs button:last-child{border-radius:0 7px 7px 0}.tabs button.active{background:linear-gradient(100deg,#1677f8,#2a83fa);color:#fff}.converter-row{display:grid;grid-template-columns:1fr 40px 1fr;align-items:center;gap:15px;margin-top:20px}.converter-row .input-unit{margin:0}.converter-row output{padding:8px 12px;flex:1;font-size:16px}.swap{border:0;background:#fff;color:#1677f8;font-size:28px}.conversion-summary{background:#f0f7fd;border-radius:8px;padding:13px 24px;margin-top:18px;line-height:1.7}.common-conversions{background:linear-gradient(120deg,#fffaf0,#fff9e8);border:1px solid #f5e5bf;border-radius:8px;margin-left:12px;padding:17px 23px}.common-conversions h3{margin:0 0 17px;font-size:14px}.common-conversions h3 span{color:#f1ad31;font-size:22px;margin-right:8px}.common-conversions h3 small{font-size:12px}.common-conversions p{margin:10px 0;font-size:14px}.formulas-card{padding:13px 21px;margin-top:14px}.formula-title{display:flex;align-items:center;justify-content:space-between}.formula-title h2{gap:7px}.gear{color:#1677f8}.formula-title a{color:#096cf0;text-decoration:none;font-size:13px}.formula-box{margin-top:14px;background:#edf7ff;border:1px solid #dce9f7;border-radius:8px}.formula-box>h3{font-size:13px;color:#1677f8;margin:0;padding:8px 16px}.formula-grid{display:grid;grid-template-columns:1fr 1.25fr .82fr;background:#fff;border-radius:7px}.formula-grid article{padding:14px 22px;border-right:1px solid #dce9f7;min-height:117px}.formula-grid article:last-child{border:0}.formula-grid h3{font-size:14px;margin:0 0 12px}.formula-grid p{font-size:12px;margin:8px 0}.math{font-family:Georgia,serif;font-size:16px!important;text-align:center}.math span{border-bottom:1px solid var(--navy)}.math em{font-style:normal;font-size:12px}.content{padding:24px 22px 32px;color:var(--muted)}.content h2{margin-bottom:8px}.content details{background:#fff;border:1px solid var(--border);padding:12px 15px;margin-top:9px;border-radius:7px}.content summary{font-weight:700;color:var(--navy);cursor:pointer}.content p{margin:7px 0}footer{border-top:1px solid var(--border);background:#fff;padding:22px max(22px,calc((100% - 980px)/2));display:flex;align-items:center;justify-content:space-between;color:var(--muted)}footer div{display:grid;gap:3px}footer b{color:var(--navy)}footer nav{gap:15px}dialog{border:1px solid var(--border);border-radius:12px;max-width:530px;width:calc(100% - 32px);padding:20px;color:var(--navy);box-shadow:0 18px 60px #00152e33}dialog::backdrop{background:#07173588}.dialog-head{display:flex;justify-content:space-between;align-items:center}.dialog-head button{border:0;background:none;font-size:28px}.dialog-head h2{font-size:20px}.share-options{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:17px 0}.share-options button{min-height:42px;border:1px solid var(--border);background:#fff;border-radius:7px}.share-options button:hover{border-color:var(--blue);color:var(--blue)}.sr-only{position:absolute;left:-9999px}
@media(max-width:760px){.site-header{height:auto}.header-inner{width:calc(100% - 32px);min-height:57px;flex-wrap:wrap;padding:8px 0;gap:8px}.brand{font-size:16px;gap:10px}.monitor-icon{width:24px;height:18px}header nav{order:3;width:100%;height:34px;justify-content:space-between;gap:8px}.language-select{margin-left:auto}.language-select select{max-width:130px}.page-shell{width:calc(100% - 24px)}.hero{padding:23px 0 18px}.hero h1{font-size:27px}.hero p{font-size:15px}.desktop-only{display:none}.top-grid,.second-grid,.converter-grid{grid-template-columns:1fr}.results-body{grid-template-columns:1fr}.metrics{grid-template-columns:1fr 1fr;gap:11px}.metrics div{min-height:auto}.second-grid{margin-top:12px}.visual-card,.distance-card{min-height:auto;padding:14px}.converter-grid{gap:12px}.common-conversions{margin-left:0}.tabs{grid-template-columns:1fr 1fr}.tabs button{border-radius:5px!important}.formula-grid{grid-template-columns:1fr}.formula-grid article{border-right:0;border-bottom:1px solid #dce9f7}.formula-title{gap:9px}.formula-title a{white-space:nowrap}.content{padding:24px 2px}footer{display:grid;gap:15px;padding:22px 14px}footer nav{height:auto;flex-wrap:wrap;gap:9px 15px}.converter-row{grid-template-columns:1fr;gap:8px}.swap{transform:rotate(90deg);height:25px}.display-stage{gap:5px}.height-line{width:55px}.height-line b{font-size:12px}.screen-frame{border-width:5px}.width-line small{font-size:10px}.share-options{grid-template-columns:1fr 1fr}.copy-top{display:none}.distance-control{grid-template-columns:34px 1fr 67px 70px;gap:5px;font-size:12px}.ppi-number{font-size:54px}}@media(max-width:390px){.header-inner{width:calc(100% - 20px)}.brand{font-size:14px}.language-select select{max-width:105px}.hero h1{font-size:24px}.specs-card{padding:14px}.results-header{padding:0 11px}.results-header h2{font-size:16px}.visual-card h2,.distance-card h2{font-size:16px}.distance-control{grid-template-columns:30px 1fr 56px 62px}.distance-control input,.distance-control select{padding:0 5px}.tabs button{font-size:12px}.ppi-panel{padding:18px}.metrics dd{font-size:14px}}