.fourier-app{--fa-ink: #e3e2dc;--fa-muted: #b4bec6;--fa-dim: #91a0ab;--fa-line: #52616d;--fa-panel: #1c2834;--fa-panel-raised: #22313e;--fa-accent: #c5aa79;--fa-accent-wash: #c5aa7918;color:var(--fa-ink);font:inherit;font-size:16px;line-height:1.5}.fourier-app *,.fourier-app *:before,.fourier-app *:after{box-sizing:border-box}.fourier-app [hidden]{display:none!important}.fourier-app h2,.fourier-app p{margin-top:0}.fourier-app h2{margin-bottom:17px;font-size:19px;font-weight:550;line-height:1.35}.fourier-app button,.fourier-app input,.fourier-app select{color:inherit;font:inherit}.fourier-app button,.fourier-app select,.fourier-app input[type=range]{-webkit-tap-highlight-color:transparent}.fourier-app :focus-visible{outline:2px solid var(--fa-accent);outline-offset:3px}.fourier-app .fa-tabs{display:flex;gap:7px;min-height:57px;margin-bottom:20px;overflow-x:auto;border-bottom:1px solid var(--fa-line);scrollbar-width:thin}.fourier-app .fa-tab{display:inline-flex;flex:0 0 auto;align-items:center;justify-content:center;min-width:112px;min-height:52px;padding:10px 20px;border-bottom:2px solid transparent;color:var(--fa-muted);font-size:16px;text-decoration:none;transition:color .18s ease,border-color .18s ease}.fourier-app .fa-tab:hover,.fourier-app .fa-tab.is-active{color:var(--fa-ink)}.fourier-app .fa-tab.is-active{border-bottom-color:var(--fa-accent)}.fourier-app .fa-view{min-width:0}.fourier-app .fa-projection-layout,.fourier-app .fa-basis-layout,.fourier-app .fa-image-layout{display:grid;grid-template-columns:minmax(275px,.78fr) minmax(0,1.45fr);gap:20px;align-items:start}.fourier-app .fa-projection-layout,.fourier-app .fa-basis-layout{grid-template-areas:"controls graph"}.fourier-app .fa-image-layout{grid-template-areas:"controls compare"}.fourier-app .fa-controls-column{grid-area:controls;display:grid;gap:16px;min-width:0}.fourier-app .fa-chart-card{grid-area:graph;min-width:0}.fourier-app .fa-comparison-card{grid-area:compare;min-width:0}.fourier-app .fa-card{min-width:0;padding:21px;border:1px solid var(--fa-line);border-radius:5px;background:linear-gradient(145deg,#202e3a,var(--fa-panel) 70%)}.fourier-app .fa-card h2{color:var(--fa-ink)}.fourier-app .fa-field-label{display:block;margin:13px 0 7px;color:var(--fa-muted);font-size:15px;font-weight:500}.fourier-app .fa-control{display:block;width:100%;min-height:46px;padding:10px 12px;border:1px solid var(--fa-line);border-radius:4px;background:#17232e;color:var(--fa-ink);font-size:16px}.fourier-app .fa-control:disabled{color:#a6b0b8;background:#1a2631}.fourier-app .fa-control option{background:#1c2834;color:var(--fa-ink)}.fourier-app .fa-expression{font-family:ui-monospace,SFMono-Regular,Consolas,monospace!important}.fourier-app .fa-hint{margin:7px 0 0;color:var(--fa-dim);font-size:13px;line-height:1.55}.fourier-app .fa-copy{margin-bottom:18px;color:var(--fa-muted);font-size:15px}.fourier-app .fa-error{margin:10px 0 0;padding:9px 11px;border-left:2px solid #d99a7e;background:#d99a7e12;color:#f0bca4;font-size:14px;overflow-wrap:anywhere}.fourier-app .fa-error[hidden]{display:none!important}.fourier-app .fa-choice-set{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin:0 0 17px;padding:0;border:0}.fourier-app .fa-choice-set>legend{margin-bottom:8px}.fourier-app .fa-choice{position:relative;display:flex;min-width:0;min-height:66px;align-items:center;gap:10px;padding:9px 11px;border:1px solid var(--fa-line);border-radius:4px;background:#17232e70;cursor:pointer;transition:border-color .18s ease,background .18s ease}.fourier-app .fa-choice:has(input:checked){border-color:var(--fa-accent);background:var(--fa-accent-wash)}.fourier-app .fa-choice input{width:18px;height:18px;flex:0 0 auto;margin:0;accent-color:var(--fa-accent)}.fourier-app .fa-choice>span{display:grid;gap:1px;min-width:0}.fourier-app .fa-choice strong{font-size:15px;font-weight:550}.fourier-app .fa-choice small{color:var(--fa-dim);font-size:12px;line-height:1.35}.fourier-app .fa-range-field{margin-top:17px}.fourier-app .fa-range-field>label{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:32px;color:var(--fa-muted);font-size:14px}.fourier-app .fa-range-field output{color:var(--fa-accent);font-weight:600;font-variant-numeric:tabular-nums}.fourier-app .fa-range-field input[type=range]{display:block;width:100%;min-height:44px;margin:0;accent-color:var(--fa-accent);cursor:pointer}.fourier-app .fa-range-field .fa-hint{margin-top:0}.fourier-app .fa-wavelet-settings{margin-top:15px;padding-top:14px;border-top:1px solid #52616d7a}.fourier-app .fa-wavelet-settings[hidden]{display:none!important}.fourier-app .fa-stats{border-color:#c5aa7952;background:linear-gradient(145deg,#c5aa7914,#1c2834)}.fourier-app .fa-stats h2{margin-bottom:12px;color:#dfc89d;font-size:16px}.fourier-app .fa-stats dl{display:grid;gap:8px;margin:0}.fourier-app .fa-stats dl>div{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.fourier-app .fa-stats dt{color:var(--fa-muted);font-size:14px}.fourier-app .fa-stats dd{margin:0;color:var(--fa-ink);font:600 14px/1.4 ui-monospace,SFMono-Regular,Consolas,monospace;text-align:right}.fourier-app .fa-chart-card{padding:16px}.fourier-app .fa-chart-wrap{position:relative;width:100%;min-width:0}.fourier-app .fa-main-chart-wrap{min-height:420px}.fourier-app .fa-basis-chart-wrap{min-height:470px}.fourier-app .fa-chart-wrap canvas{display:block;width:100%!important;height:100%!important}.fourier-app .fa-legend{display:flex;flex-wrap:wrap;justify-content:center;gap:17px;padding:13px 4px 2px;color:var(--fa-muted);font-size:13px}.fourier-app .fa-legend>span{display:inline-flex;align-items:center;gap:7px}.fourier-app .fa-legend i{width:14px;height:3px;border-radius:3px}.fourier-app .fa-legend-original{background:#e3e2dc85}.fourier-app .fa-legend-projection{background:var(--fa-accent)}.fourier-app .fa-definition-card{text-align:center}.fourier-app .fa-math-definition{display:flex;min-height:74px;align-items:center;justify-content:center;overflow-x:auto;color:var(--fa-ink);font-size:20px}.fourier-app .fa-math-definition .katex{color:inherit}.fourier-app .fa-image-choices{grid-template-columns:repeat(3,minmax(0,1fr))}.fourier-app .fa-image-choices .fa-choice{min-height:64px;justify-content:center;padding-inline:6px;text-align:center}.fourier-app .fa-image-choices .fa-choice>span{justify-items:center}.fourier-app .fa-image-choices .fa-choice strong{font-size:14px}.fourier-app .fa-image-choices .fa-choice small{font-size:11px}.fourier-app .fa-comparison-card{padding:17px}.fourier-app .fa-comparison-heading{margin-bottom:14px}.fourier-app .fa-comparison-heading h2{margin-bottom:3px}.fourier-app .fa-comparison-heading p{margin:0;color:var(--fa-muted);font-size:14px}.fourier-app .fa-image-compare{position:relative;width:min(100%,512px);aspect-ratio:1;margin-inline:auto;overflow:hidden;border:1px solid var(--fa-line);border-radius:3px;background:#111a22;box-shadow:0 8px 24px #0004;touch-action:pan-y;-webkit-user-select:none;user-select:none}.fourier-app .fa-image-compare canvas{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:cover}.fourier-app #canvasCompressed{clip-path:polygon(50% 0,100% 0,100% 100%,50% 100%)}.fourier-app .fa-compare-slider{position:absolute;z-index:2;top:0;bottom:0;left:50%;display:flex;width:44px;align-items:center;justify-content:center;padding:0;transform:translate(-50%);border:0;background:transparent;cursor:ew-resize;touch-action:none}.fourier-app .fa-compare-slider:before{position:absolute;top:0;bottom:0;left:50%;width:2px;content:"";background:#fff;box-shadow:0 0 5px #000b}.fourier-app .fa-compare-slider>span{z-index:1;display:grid;width:34px;height:34px;place-items:center;border:1px solid #d1d5db;border-radius:50%;background:#f6f4ec;color:#24313c;box-shadow:0 2px 8px #0008;font-size:19px;line-height:1}.fourier-app .fa-image-labels{display:flex;justify-content:space-between;padding:12px 6px 0;color:var(--fa-muted);font-size:13px}.fourier-app .fa-image-caption{text-align:center}.fourier-app #image-status{min-height:22px}.fourier-app .fa-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}@media(max-width:780px){.fourier-app .fa-tabs{min-height:53px;margin-bottom:15px}.fourier-app .fa-tab{min-width:100px;min-height:48px;padding-inline:14px}.fourier-app .fa-projection-layout,.fourier-app .fa-basis-layout,.fourier-app .fa-image-layout{grid-template-columns:minmax(0,1fr);gap:14px}.fourier-app .fa-projection-layout,.fourier-app .fa-basis-layout{grid-template-areas:"graph" "controls"}.fourier-app .fa-image-layout{grid-template-areas:"compare" "controls"}.fourier-app .fa-main-chart-wrap{min-height:clamp(310px,78vw,390px)}.fourier-app .fa-basis-chart-wrap{min-height:clamp(330px,85vw,430px)}.fourier-app .fa-card{padding:17px}.fourier-app .fa-chart-card{padding:12px}.fourier-app .fa-card h2{font-size:18px}}@media(max-width:420px){.fourier-app .fa-choice-set{gap:6px}.fourier-app .fa-choice{gap:7px;padding-inline:8px}.fourier-app .fa-image-choices .fa-choice{padding-inline:4px}.fourier-app .fa-stats dl>div{align-items:flex-start}.fourier-app .fa-stats dd{max-width:46%}}@media(prefers-reduced-motion:reduce){.fourier-app *,.fourier-app *:before,.fourier-app *:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}