@charset "UTF-8";
/* Aperture comparison keeps the two photographs at equal brightness. */
.depth-compare{display:flex;align-items:center;gap:7px;background:transparent;color:#ddc5a8;font-size:10px;padding:9px 0 0;text-align:left}
.depth-compare svg{width:13px;height:13px}.depth-compare:hover{color:#fff0dd}.depth-compare:disabled{opacity:.4;cursor:wait}
.depth-dialog{width:min(1160px,calc(100% - 48px));max-height:calc(100dvh - 48px);padding:28px;background:#191c18;color:#f0eee8;border:1px solid #4a5141;border-radius:14px;box-shadow:0 30px 100px #000a}
.depth-dialog::backdrop{background:#080b09ce;backdrop-filter:blur(7px)}
.depth-dialog-heading{display:flex;justify-content:space-between;align-items:center;gap:18px}.depth-dialog h2{font-weight:450;letter-spacing:-.6px;font-size:27px;margin:10px 0 0}
.depth-close{display:flex;align-items:center;gap:9px;flex-shrink:0;background:#2c3227;border:1px solid #4a5340;border-radius:6px;padding:9px 12px;font-size:11px}.depth-close span{font-size:20px;line-height:1}
#depth-description{font-size:12px;line-height:1.8;color:#aab39e;max-width:800px;margin:18px 0 22px}.depth-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.depth-grid figure{margin:0;min-width:0}.depth-grid figcaption{display:flex;align-items:center;gap:13px;flex-wrap:wrap;margin-bottom:12px}.depth-grid strong{font-weight:500;font-size:25px;color:#e5c5a1}.depth-grid figcaption span{font-size:10px;color:#b2bca6}.depth-grid canvas{display:block;width:100%;height:auto;aspect-ratio:3/2;border-radius:8px;border:1px solid #454d3d}.depth-observation{margin:21px 0 0;border-top:1px solid #353e2d;padding-top:17px;color:#c3ceb6;font-size:12px;line-height:1.7}
@media(max-width:650px){.depth-dialog{width:calc(100% - 24px);max-height:calc(100dvh - 24px);padding:18px}.depth-dialog h2{font-size:22px}.depth-grid{grid-template-columns:1fr;gap:20px}.depth-dialog .eyebrow{font-size:8px;letter-spacing:1px}.depth-grid figcaption{margin-bottom:8px}.depth-grid strong{font-size:22px}.depth-close{padding:8px;font-size:10px}}
:root{color-scheme:dark;--bg:#111211;--surface:#191b19;--surface-2:#20231f;--line:#30332e;--text:#f0eee8;--muted:#a4a79d;--subtle:#7d8478;--accent:#dfb28a;--green:#b5c7a4;--radius:13px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}button,input,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button{color:inherit}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:6px}button{border:0}button svg,svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}.sprite{position:absolute;width:0;height:0;overflow:hidden}.wrap{width:min(1320px,calc(100% - 96px));margin-inline:auto}.header{height:101px;border-bottom:1px solid #292c27;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:flex;align-items:center;font-size:29px;font-weight:650;letter-spacing:-1.3px}.brand svg{width:32px;height:32px;margin-right:11px;color:var(--accent);stroke-width:1.25}.brand>span{color:var(--accent)}.header nav{display:flex;gap:34px;font-size:13px;margin-left:85px;color:var(--muted)}.header nav a{transition:color .2s}.header nav a:hover,.header nav a.current{color:var(--text)}.header-note{font-size:12px;color:#8f9688;letter-spacing:.1px}.intro{padding:48px 0 35px}.eyebrow{display:flex;align-items:center;gap:11px;font-size:10px;font-weight:550;letter-spacing:1.7px;color:var(--muted)}.lesson-number{font-size:10px;color:var(--accent);border:1px solid #524638;padding:4px 6px;border-radius:4px;letter-spacing:0}.eyebrow-line{height:1px;width:20px;background:#52574c;margin-inline:3px}.intro-row{display:flex;align-items:center;justify-content:space-between;gap:28px;margin-top:22px}.intro h1{font-weight:440;font-size:clamp(34px,3.5vw,51px);letter-spacing:-1.9px;line-height:1.12;margin:0}.intro h1 em{font-family:Georgia,"Times New Roman",serif;font-weight:400;color:var(--accent);letter-spacing:-2px}.intro-row>p{margin:1px 0 0;color:var(--muted);font-size:13px;line-height:1.8;flex-shrink:0}.lab{scroll-margin-top:22px}.lab-toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:17px;gap:16px}.live-label{display:flex;align-items:center;gap:9px;color:#a7afa0;font-size:9px;font-weight:600;letter-spacing:1.6px}.live-label>span{background:var(--green);width:5px;height:5px;border-radius:50%;box-shadow:0 0 9px #b5c7a41c}.presets{display:flex;gap:5px;flex-wrap:wrap}.preset{background:transparent;color:#a6ab9f;border:1px solid transparent;border-radius:6px;font-size:11px;padding:8px 13px;transition:background .15s,color .15s,border-color .15s}.preset:hover{background:#20231e;color:var(--text)}.preset.active{background:#2b2e27;border-color:#454b3c;color:#e1e8d8}.simulator{display:grid;grid-template-columns:minmax(0,1.94fr) minmax(315px,1fr);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.preview-column{min-width:0;border-right:1px solid var(--line);display:flex;flex-direction:column}.photo-wrap{aspect-ratio:3/2;position:relative;overflow:hidden;background:#20261d;flex:1;min-height:340px}#photo{position:absolute;display:block;width:100%;height:100%;object-fit:cover}.photo-wrap:after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(180deg,#0005 0,transparent 21%,transparent 72%,#0009 100%)}.photo-top,.photo-bottom{position:absolute;z-index:2;left:25px;right:25px;display:flex;justify-content:space-between;align-items:center;gap:10px}.photo-top{top:24px}.scene-label{font-size:8px;letter-spacing:1.4px;font-weight:550;display:flex;align-items:center;gap:7px;color:#f3f1e9}.scene-dot{width:4px;height:4px;display:inline-block;background:#f3f1e9;border-radius:50%}.photo-mode{font-size:7px;letter-spacing:1.4px;padding:6px 8px;border:1px solid #fff4;border-radius:4px;background:#1113}.photo-bottom{bottom:23px}.photo-caption{display:flex;flex-direction:column;gap:5px}.photo-caption>span{font-size:13px;font-weight:500;letter-spacing:.1px}.photo-caption>small{font-size:10px;color:#d6d9cc}.compare{display:flex;gap:8px;align-items:center;font-size:10px;padding:9px 12px;border-radius:5px;background:#0b100c66;border:1px solid #ffffff50;backdrop-filter:blur(12px);transition:background .2s}.compare:hover{background:#151a13bb}.compare[aria-pressed="true"]{background:#e6ddcd;color:#151714}.compare svg{height:14px;width:14px}.focus-mark{position:absolute;z-index:1;top:43%;left:34%;width:45px;height:45px;opacity:.6;pointer-events:none}.focus-mark i{position:absolute;width:8px;height:8px;border-color:#fff9;border-style:solid}.focus-mark i:nth-child(1){top:0;left:0;border-width:1px 0 0 1px}.focus-mark i:nth-child(2){top:0;right:0;border-width:1px 1px 0 0}.focus-mark i:nth-child(3){bottom:0;left:0;border-width:0 0 1px 1px}.focus-mark i:nth-child(4){bottom:0;right:0;border-width:0 1px 1px 0}.photo-loading{position:absolute;inset:0;display:grid;place-items:center;color:var(--muted);font-size:13px;z-index:3;background:#20261d}.photo-loading[hidden]{display:none}.photo-loading.error{padding:40px;line-height:1.8;text-align:center}.meter-panel{padding:21px 28px 17px;background:#171916}.meter-heading{display:flex;align-items:center;justify-content:space-between;gap:10px}.meter-title{color:#a2a999;font-size:9px;letter-spacing:1.4px}.exposure-state{display:flex;gap:7px;align-items:center;color:var(--green);font-size:11px}.status-dot{display:inline-block;width:5px;height:5px;background:currentColor;border-radius:50%}.exposure-state.off{color:#e1b685}.ev{color:#b4baac;border-left:1px solid #444a3e;padding-left:10px;margin-left:3px;font-variant-numeric:tabular-nums;min-width:42px}.meter{height:39px;position:relative;margin:13px 4px 0}.meter-track{position:absolute;top:0;left:0;width:100%;height:10px;background:repeating-linear-gradient(90deg,#4c5345 0,#4c5345 1px,transparent 1px,transparent calc(100% / 48));border-right:1px solid #4c5345;mask-image:linear-gradient(90deg,#0006,#000,#0006)}.meter-ticks{display:flex;justify-content:space-between;position:absolute;inset:18px -4px 0;font-size:9px;color:#939c88;font-variant-numeric:tabular-nums}.meter-ticks>span{width:15px;text-align:center}.meter-ticks .zero{color:var(--green)}.meter-needle{position:absolute;top:-4px;left:50%;width:2px;height:17px;background:var(--accent);transform:translateX(-50%);transition:left .18s ease}.meter-needle:before{content:"";position:absolute;top:-4px;left:-2px;width:6px;height:4px;background:var(--accent);clip-path:polygon(0 0,100% 0,50% 100%)}.meter-ends{display:flex;justify-content:space-between;font-size:8px;color:#8c9580}.settings{padding:23px 28px 21px;display:flex;flex-direction:column;min-width:0}.settings-heading{display:flex;justify-content:space-between;align-items:center;padding-bottom:5px}.settings-heading h2{margin:0;font-size:14px;font-weight:500;letter-spacing:-.1px}.reset{font-size:9px;color:#b2b7aa;background:none;display:flex;align-items:center;gap:5px;padding:5px 0 5px 8px}.reset:hover{color:var(--text)}.reset svg{height:12px;width:12px}.control{--control-color:#d6bc9d;padding:24px 0 17px;border-bottom:1px solid var(--line)}.shutter-control{--control-color:#b5c7a4}.iso-control{--control-color:#b0b7d1;border-bottom:0}.control-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}.control-heading label{display:flex;align-items:center;gap:9px;font-size:13px;font-weight:500}.control-heading label>svg{height:19px;width:19px;color:var(--control-color);stroke-width:1.3}.control-heading output{font-size:23px;font-weight:450;letter-spacing:-.5px;line-height:1;font-variant-numeric:tabular-nums}.control-heading output small{font-size:12px;font-weight:400;color:#bfc2b9}.control-description{margin:10px 0 17px;font-size:11px;color:#a1a899;line-height:1.45}input[type="range"]{--progress:50%;-webkit-appearance:none;appearance:none;width:100%;height:22px;display:block;background:transparent;cursor:pointer;margin:0;touch-action:pan-y}input[type="range"]::-webkit-slider-runnable-track{height:3px;border-radius:3px;background:linear-gradient(to right,var(--control-color) var(--progress),#454c3e var(--progress))}input[type="range"]::-moz-range-track{height:3px;border-radius:3px;background:#454c3e}input[type="range"]::-moz-range-progress{height:3px;background:var(--control-color)}input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:13px;height:13px;border-radius:50%;background:#f0eee7;border:3px solid var(--control-color);margin-top:-5px;box-shadow:0 0 0 4px #d5dfbf05;transition:box-shadow .15s}input[type="range"]::-moz-range-thumb{width:9px;height:9px;border-radius:50%;background:#f0eee7;border:2px solid var(--control-color)}input[type="range"]:hover::-webkit-slider-thumb{box-shadow:0 0 0 5px #d5dfbf15}.range-ends{display:flex;justify-content:space-between;font-size:9px;margin-top:3px;color:#b7bdaf;font-variant-numeric:tabular-nums}.range-ends span>span{color:#939c88}.effect{display:flex;align-items:flex-start;gap:6px;color:var(--control-color);margin-top:14px;min-height:16px}.effect-dot{width:3px;height:3px;background:currentColor;border-radius:50%;margin-top:6px;flex-shrink:0}.effect p{margin:0;font-size:10px;line-height:1.5}.live-advice{margin-top:auto;display:flex;align-items:flex-start;gap:10px;border:1px solid #3a4132;border-radius:7px;background:#23281f;padding:12px 13px;color:#becbb2;min-height:59px}.advice-spark{font-size:16px;line-height:1.3;color:var(--green)}.live-advice p{margin:0;font-size:10px;line-height:1.65}.lab-footnote{display:flex;align-items:center;justify-content:space-between;gap:15px;color:#949c8a;font-size:9px;margin-top:14px}.lab-footnote>span{display:flex;align-items:center;gap:6px}.tiny-dot{display:inline-block;width:3px;height:3px;background:#77846b;border-radius:50%}.text-button{font-size:9px;color:#a4ad99;background:none;padding:4px 0}.text-button span{margin-left:6px}.model-details{margin-top:14px;font-size:11px;line-height:1.8;padding:17px 20px;border:1px solid var(--line);border-radius:7px;color:var(--muted)}.learn{margin-top:75px;padding-top:37px;border-top:1px solid var(--line);scroll-margin-top:35px}.learn-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:50px}.learn-heading h2{margin:18px 0 0;font-size:36px;letter-spacing:-1.1px;font-weight:430;line-height:1.2}.learn-heading h2 span{color:#959f88}.learn-heading>p{max-width:350px;margin:0 0 3px;color:var(--muted);font-size:13px;line-height:1.8}.principles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:38px;gap:34px}.principles article{border-top:1px solid #3c4136;padding-top:20px;display:flex;flex-direction:column}.principle-number{font-size:9px;color:#a4b098;letter-spacing:1.5px}.principle-title{display:flex;gap:10px;align-items:center;margin-top:20px}.principle-title svg{color:var(--accent);flex-shrink:0}.principles article:nth-child(2) svg{color:var(--green)}.principles article:nth-child(3) svg{color:#b0b7d1}.principle-title h3{font-size:17px;font-weight:450;letter-spacing:-.3px;margin:0}.principles article>p{font-size:12px;line-height:1.9;color:var(--muted);margin:13px 0 20px;max-width:340px}.principles button,.takeaway button{display:flex;gap:9px;align-items:center;font-size:10px;background:none;padding:0;color:#e0d0bc;text-align:left;align-self:flex-start;margin-top:auto}.principles button svg,.takeaway button svg{width:15px;height:15px;transition:transform .2s}.principles button:hover svg,.takeaway button:hover svg{transform:translateX(4px)}.takeaway{display:flex;align-items:center;gap:22px;background:#1b1e19;border:1px solid #343a2e;border-radius:9px;padding:24px 25px;margin-top:38px}.takeaway-icon{font-size:27px;color:var(--green)}.takeaway p{margin:0;font-size:12px;line-height:1.8;color:#a8b09f;max-width:780px}.takeaway strong{color:#d7dfce;font-weight:500;display:block}.takeaway button{margin:0 0 0 auto;white-space:nowrap;flex-shrink:0}.footer{margin-top:67px;border-top:1px solid var(--line);padding-block:28px 35px;display:flex;align-items:center;justify-content:space-between;gap:20px}.footer .brand{font-size:22px}.footer>span,.footer>a:last-child{font-size:10px;color:#959e89}.footer>a:last-child:hover{color:var(--text)}.skip-link{position:fixed;z-index:20;top:-100px;left:15px;padding:10px;background:var(--accent);color:#111}.skip-link:focus{top:10px}.noscript{position:fixed;bottom:0;padding:15px;background:#d8b38f;color:#111;width:100%;text-align:center}
@media(min-width:1550px){.intro{padding-top:57px;padding-bottom:43px}.header{height:110px}.intro h1{font-size:54px}.settings{padding:27px 33px 24px}.control{padding:27px 0 20px}.control-description{margin-bottom:18px}.control-heading output{font-size:25px}.effect{margin-top:17px}.photo-wrap{min-height:440px}}
@media(max-width:1150px){.wrap{width:calc(100% - 56px)}.header{height:84px}.intro{padding-top:35px}.intro-row{align-items:flex-start;flex-direction:column;gap:13px}.intro-row>p br{display:none}.intro h1{font-size:44px}.simulator{grid-template-columns:minmax(0,1.65fr) minmax(310px,1fr)}.settings{padding:22px}.photo-wrap{min-height:420px}.control{padding:23px 0 18px}.photo-top,.photo-bottom{left:19px;right:19px}.photo-mode{display:none}.principle-title h3{font-size:15px}.principles{gap:24px}.takeaway button{white-space:normal;max-width:130px}.learn-heading>p{max-width:320px}}
@media(max-width:800px){.wrap{width:calc(100% - 40px)}.header{height:76px}.header-note{display:none}.header nav{margin:0;font-size:12px;gap:23px}.brand{font-size:26px}.brand svg{width:29px;height:29px}.intro{padding:29px 0 26px}.intro h1{font-size:39px;letter-spacing:-1.6px}.intro h1 em{letter-spacing:-1.7px}.eyebrow{font-size:8px;gap:8px;letter-spacing:1.15px}.eyebrow-line{width:10px}.intro-row>p{font-size:12px;line-height:1.7}.lab-toolbar{align-items:flex-start;flex-direction:column;gap:14px}.presets{width:100%;gap:5px}.preset{flex:1;padding:9px 7px;background:#181b17;border:1px solid #30382b;font-size:10px}.simulator{grid-template-columns:1fr}.preview-column{border-right:0;border-bottom:1px solid var(--line)}.photo-wrap{min-height:0;flex:auto;aspect-ratio:3/2}.settings{padding:21px 24px 24px}.settings-heading{padding-bottom:4px}.control{padding:21px 0 17px}.control-description{margin-top:8px;margin-bottom:12px}.control-heading output{font-size:24px}.control-heading label{font-size:14px}.effect{margin-top:10px}.effect p{font-size:11px}.control-description{font-size:12px}.range-ends{font-size:10px}.live-advice{margin-top:7px;min-height:0}.live-advice p{font-size:11px}.reset{font-size:10px}.meter-panel{padding:18px 24px 16px}.learn{margin-top:47px;padding-top:28px}.learn-heading{flex-direction:column;align-items:flex-start;gap:20px}.learn-heading h2{font-size:32px}.learn-heading>p{max-width:100%;font-size:12px}.principles{grid-template-columns:1fr;gap:28px;margin-top:28px}.principles article>p{max-width:none;margin-bottom:15px}.principle-title{margin-top:15px}.principle-title h3{font-size:18px}.principles button{font-size:11px}.takeaway{flex-wrap:wrap;gap:12px;padding:20px}.takeaway-icon{display:none}.takeaway button{margin-left:0;max-width:none;font-size:11px}.footer{margin-top:38px;flex-wrap:wrap;padding-bottom:24px;row-gap:15px}.footer>span{order:3;flex-basis:100%}.footer>a:last-child{margin-left:auto}.lab-footnote{align-items:flex-start;font-size:8px}.text-button{font-size:8px;padding:0}.photo-top{top:18px}.photo-bottom{bottom:17px}.photo-caption>span{font-size:12px}.photo-caption>small{font-size:9px}.scene-label{font-size:7px}.compare{padding:8px 9px;font-size:9px}.focus-mark{width:30px;height:30px}}
@media(max-width:400px){.wrap{width:calc(100% - 28px)}.intro h1{font-size:35px}.intro h1 em{display:block;margin-top:4px}.header nav{gap:17px;font-size:11px}.eyebrow-line{display:none}.eyebrow{letter-spacing:.8px;gap:6px}.settings{padding:20px}.lab-footnote{gap:10px;line-height:1.6}.text-button{max-width:125px;text-align:right}.photo-caption>span{font-size:10px}.scene-label{font-size:6px;letter-spacing:1px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}
/* Keep the live photograph in sight while adjusting the mobile controls. */
@media(max-width:800px){
 .simulator{display:block;overflow:visible}
 .preview-column{position:sticky;top:0;z-index:5;background:#171916;border-radius:12px 12px 0 0;overflow:hidden;box-shadow:0 7px 20px #0005}
 .photo-wrap{aspect-ratio:16/9}
 .meter-panel{padding:12px 20px 10px}
 .meter{height:31px;margin-top:10px}
 .meter-ends{font-size:8px}
 .control input{scroll-margin-top:340px}
 .settings-heading{scroll-margin-top:340px}
}
.scene-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:0 0 13px}.scene-heading h2{font-size:12px;font-weight:450;color:#c1c7b8;margin:0}.light-switch{display:flex;padding:3px;background:#1c201a;border:1px solid #333c2d;border-radius:7px;gap:3px}.light-switch button{display:flex;gap:7px;align-items:center;padding:6px 14px;border-radius:4px;background:none;font-size:11px;color:#a6af9c}.light-switch button[aria-pressed="true"]{background:#3c4032;color:#f0e8d8;box-shadow:0 1px 4px #0004}.light-switch button span{font-size:16px;line-height:1}.scene-picker{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));gap:9px;margin-bottom:25px;overflow-x:auto;padding:3px 2px 6px;scrollbar-color:#46513b transparent;scrollbar-width:thin}.scene-option{display:flex;flex-direction:column;align-items:center;gap:8px;background:transparent;color:#a8b19e;padding:0;font-size:10px;min-width:0}.scene-option img{width:100%;height:58px;object-fit:cover;border:1px solid #343d2b;border-radius:6px;filter:saturate(.65) brightness(.7);transition:filter .2s,border-color .2s}.scene-option:hover img{filter:saturate(.9) brightness(.95)}.scene-option.active{color:#edceb0}.scene-option.active img{filter:none;border-color:var(--accent);box-shadow:0 0 0 2px #dfb28a25}.tripod-toggle{position:relative;display:flex;align-items:center;gap:7px;width:fit-content;font-size:10px;color:#aebba3;margin-top:13px;cursor:pointer}.tripod-toggle input{position:absolute;left:0;top:0;width:28px;height:16px;opacity:0;margin:0}.toggle-track{display:block;width:26px;height:14px;background:#414a38;border-radius:10px;position:relative;transition:background .15s}.toggle-track:after{content:"";width:10px;height:10px;position:absolute;left:2px;top:2px;border-radius:50%;background:#bec6b2;transition:transform .15s}.tripod-toggle input:checked+.toggle-track{background:#9baa89}.tripod-toggle input:checked+.toggle-track:after{transform:translateX(12px);background:#15200f}.tripod-toggle input:focus-visible+.toggle-track{outline:2px solid var(--accent);outline-offset:4px}.model-details p{margin:0 0 8px}.model-details p:last-child{margin-bottom:0}.intro{padding-top:35px;padding-bottom:30px}
@media(max-width:800px){.scene-picker{display:flex;gap:10px;scroll-snap-type:x proximity;margin-bottom:19px}.scene-option{min-width:78px;scroll-snap-align:start}.scene-option img{width:78px;height:53px}.scene-heading{margin-bottom:10px}.light-switch button{padding:6px 10px}.intro{padding-top:27px;padding-bottom:25px}.scene-heading h2{font-size:11px}.scene-option{font-size:9px}}