.opacity-page{--opacity-accent:var(--data-good)}.opacity-workspace.is-dragging{outline:3px solid color-mix(in srgb, var(--opacity-accent) 45%, transparent);outline-offset:3px}.opacity-workspace-body{grid-template-columns:minmax(0,1fr) 304px}.opacity-preview-area{grid-template-rows:auto auto auto}.opacity-preview-grid{min-height:0}.opacity-preview-card{grid-template-rows:auto 360px auto}.opacity-stage{background-color:var(--surface);min-height:0}.opacity-stage[data-preview-background=checker]{background-color:#eef0ea;background-image:linear-gradient(45deg,#d2d8d0 25%,#0000 25%),linear-gradient(-45deg,#d2d8d0 25%,#0000 25%),linear-gradient(45deg,#0000 75%,#d2d8d0 75%),linear-gradient(-45deg,#0000 75%,#d2d8d0 75%);background-position:0 0,0 12px,12px -12px,-12px 0;background-size:24px 24px}.opacity-stage[data-preview-background=white]{background:#fff}.opacity-stage[data-preview-background=black]{background:#121512}.opacity-stage canvas{width:auto;max-width:100%;height:auto;max-height:100%;box-shadow:0 5px 22px var(--shadow);background:0 0;border:0;border-radius:0}.opacity-preview-note{border-top:1px solid var(--line);min-height:38px;color:var(--muted);margin:0;padding:10px 12px;font-size:11px;line-height:1.5}.opacity-preview-footer{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding:12px 14px;font-size:11px;display:flex}.opacity-background-options{align-items:center;gap:11px;display:flex}.opacity-background-options>span{margin-right:2px}.opacity-background-options button{cursor:pointer;border:1px solid #8a948a;border-radius:50%;width:22px;height:22px;padding:0}.opacity-background-options button[aria-pressed=true]{outline:2px solid var(--opacity-accent);outline-offset:3px}.opacity-background-options [data-opacity-background=checker]{background:conic-gradient(#c7cfc5 25%, #f2f4ef 0 50%, #c7cfc5 0 75%, #f2f4ef 0);background-size:10px 10px}.opacity-background-options [data-opacity-background=white]{background:#fff}.opacity-background-options [data-opacity-background=black]{background:#121512}.opacity-control-panel{grid-template-rows:minmax(0,1fr) auto}.opacity-control-scroll{min-height:0;overflow-y:auto}.opacity-step{background:var(--opacity-accent);width:21px;height:21px;color:var(--surface);font-variant-numeric:tabular-nums;border-radius:50%;place-items:center;margin-right:6px;font-size:11px;display:inline-grid}.opacity-value-label{color:var(--muted);font-size:var(--fs-xs);justify-content:space-between;align-items:center;gap:10px;margin:18px 0 10px;display:flex}.opacity-number-field{align-items:center;gap:4px;display:flex}.opacity-number-field input{border:1px solid var(--line);background:var(--panel);width:74px;min-height:36px;color:var(--opacity-accent);font-family:var(--font-mono);font-size:var(--fs-base);font-weight:var(--fw-semibold);font-variant-numeric:tabular-nums;border-radius:6px;padding:6px 8px}.opacity-control-panel input[type=range]{accent-color:var(--opacity-accent)}.opacity-range-labels{color:var(--muted);justify-content:space-between;gap:12px;margin-top:6px;font-size:10px;display:flex}.opacity-presets{grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;margin-top:18px;display:grid}.opacity-presets button{border:1px solid var(--line);background:var(--panel);min-width:0;min-height:35px;color:var(--muted);cursor:pointer;font-size:11px;font-weight:var(--fw-semibold);border-radius:6px;padding:0 4px}.opacity-presets button:hover,.opacity-presets button.is-active{border-color:var(--opacity-accent);color:var(--ink)}.opacity-presets button.is-active{box-shadow:inset 0 0 0 1px var(--opacity-accent);background:color-mix(in srgb, var(--opacity-accent) 11%, var(--panel))}.opacity-control-hint{color:var(--muted);margin:12px 0 0;font-size:11px;line-height:1.55}.opacity-rule-section{border-bottom:0}.opacity-facts{gap:12px;margin:16px 0 0;padding:0;list-style:none;display:grid}.opacity-facts li{gap:2px;display:grid}.opacity-facts strong{color:var(--ink);font-size:var(--fs-xs);font-weight:var(--fw-semibold)}.opacity-facts span{color:var(--muted);font-size:11px;line-height:1.45}.opacity-actions{gap:9px}.opacity-actions .button:first-child{background:var(--opacity-accent);border-color:var(--opacity-accent);color:var(--surface)}.opacity-actions .button:first-child:hover{filter:brightness(1.08)}.opacity-message{border-top:1px solid var(--line);background:color-mix(in srgb, var(--opacity-accent) 9%, var(--panel));min-height:43px;color:var(--ink);margin:0;padding:12px 16px;font-size:12px;line-height:1.6}.opacity-message.is-error{color:#b33825;background:#fce9e3}[data-theme=dark] .opacity-message.is-error{color:#ffb7a8;background:#3b241f}.opacity-page .section-heading{max-width:800px}.opacity-page .section-heading>p{max-width:75ch;line-height:1.65}.opacity-page .opacity-hero>.section-heading{grid-column:1/-1;max-width:none;display:block}.opacity-page .opacity-hero .tool-page-answer{max-width:none}.opacity-page .opacity-facts-list{color:var(--muted);font-size:var(--fs-sm);flex-wrap:wrap;gap:8px 22px;margin:14px 0 0;padding:0;list-style:none;display:flex}.opacity-page .opacity-facts-list li:before{content:"✓";color:var(--opacity-accent);margin-right:7px}.opacity-examples{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;display:grid}.opacity-example{border:1px solid var(--line);background:var(--surface);border-radius:10px;overflow:hidden}.opacity-example-comparison{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.opacity-example-comparison>div+div{border-left:1px solid #c7cfc5}.opacity-example-visual{background-color:#eef0ea;background-image:linear-gradient(45deg,#d2d8d0 25%,#0000 25%),linear-gradient(-45deg,#d2d8d0 25%,#0000 25%),linear-gradient(45deg,#0000 75%,#d2d8d0 75%),linear-gradient(-45deg,#0000 75%,#d2d8d0 75%);background-position:0 0,0 12px,12px -12px,-12px 0;background-size:24px 24px;place-items:center;min-height:212px;padding:16px;display:grid}.opacity-example-visual img{object-fit:contain;width:100%;max-width:260px;height:170px;display:block}.opacity-example-label{background:var(--surface);color:var(--ink);border-radius:4px;place-self:end start;padding:4px 7px;font-size:10px}.opacity-example-copy{padding:22px}.opacity-example-copy h3{margin:0 0 9px;font-size:18px}.opacity-example-copy p{color:var(--muted);margin:0 0 18px;font-size:13px;line-height:1.65}.opacity-example-copy .button{background:color-mix(in srgb, var(--opacity-accent) 12%, var(--surface));border:0}.opacity-overlay-demo{margin-top:28px}.opacity-overlay-heading{margin-bottom:18px}.opacity-overlay-heading h3{margin:0 0 8px;font-size:22px;line-height:1.35}.opacity-overlay-heading p{max-width:75ch;color:var(--muted);margin:0;font-size:14px;line-height:1.7}.opacity-overlay-comparison{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}.opacity-overlay-comparison figure{min-width:0;margin:0}.opacity-overlay-comparison img{border-radius:8px;width:100%;height:auto;display:block}.opacity-overlay-comparison figcaption{gap:6px;padding:14px 0 0;display:grid}.opacity-overlay-comparison figcaption strong{color:var(--ink);font-size:14px;font-weight:var(--fw-semibold)}.opacity-overlay-comparison figcaption span{color:var(--muted);font-size:12px;line-height:1.6}.opacity-overlay-footer{background:color-mix(in srgb, var(--opacity-accent) 8%, var(--surface));border-radius:8px;justify-content:space-between;align-items:center;gap:24px;margin-top:22px;padding:20px 22px;display:flex}.opacity-overlay-footer p{max-width:70ch;color:var(--muted);margin:0;font-size:13px;line-height:1.7}.opacity-overlay-footer p strong{color:var(--ink)}.opacity-overlay-footer .button{background:var(--opacity-accent);border-color:var(--opacity-accent);color:var(--surface);flex-shrink:0}.opacity-use-cases{grid-template-columns:repeat(4,minmax(0,1fr));gap:26px;display:grid}.opacity-use-case{min-width:0;padding-top:7px}.opacity-use-icon{background:var(--opacity-accent);width:44px;height:44px;color:var(--surface);border-radius:13px;place-items:center;margin-bottom:20px;display:grid}.opacity-use-icon .icon{width:23px;height:23px}.opacity-use-case h3{margin:0 0 10px;font-size:17px;line-height:1.4}.opacity-use-case p{color:var(--muted);margin:0;font-size:13px;line-height:1.75}.opacity-use-case small{color:var(--opacity-accent);margin-top:16px;font-size:11px;display:block}.opacity-steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:0;padding:0;list-style:none;display:grid}.opacity-steps li{border-top:3px solid var(--opacity-accent);background:var(--surface);border-radius:8px;min-width:0;padding:24px}.opacity-steps li>span{color:var(--opacity-accent);font-family:var(--font-mono);margin-bottom:22px;font-size:26px;display:block}.opacity-steps h3{margin:0 0 10px;font-size:17px}.opacity-steps p{color:var(--muted);margin:0;font-size:13px;line-height:1.7}.opacity-guide-grid{grid-template-columns:1fr 1fr;gap:50px;display:grid}.opacity-guide-grid h2{margin:0 0 18px;font-size:27px;line-height:1.2}.opacity-guide-grid p{color:var(--muted);font-size:14px;line-height:1.75}.opacity-guide-grid strong{color:var(--ink)}.opacity-page .related-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;display:grid}.opacity-page .related-card{border:1px solid var(--line);background:var(--surface);min-width:0;color:var(--ink);border-radius:10px;flex-direction:column;align-items:flex-start;gap:20px;padding:26px;text-decoration:none;transition:border-color .16s,background .16s,transform .16s;display:flex}.opacity-page .related-card:hover{border-color:var(--opacity-accent);background:color-mix(in srgb, var(--opacity-accent) 9%, var(--surface));transform:translateY(-2px)}.opacity-related-icon{background:var(--opacity-accent);width:48px;height:48px;color:var(--surface);border-radius:13px;flex:0 0 48px;place-items:center;display:grid}.opacity-related-icon .icon{width:23px;height:23px}.opacity-related-copy{min-width:0}.opacity-related-copy h3{font-size:19px;font-weight:var(--fw-semibold);margin:0 0 9px;line-height:1.35}.opacity-related-copy p{color:var(--muted);margin:0;font-size:13px;line-height:1.7}.opacity-related-action{border-top:1px solid var(--line);width:100%;color:var(--opacity-accent);font-size:12px;font-weight:var(--fw-semibold);justify-content:space-between;align-items:center;margin-top:auto;padding-top:16px;display:flex}.opacity-related-action>span{font-size:20px;line-height:1}.opacity-updated{color:var(--muted);margin:0;font-size:11px}.opacity-page button:focus-visible,.opacity-page input:focus-visible{outline:2px solid var(--focus);outline-offset:3px}@media (width<=1050px){.opacity-workspace-body{grid-template-columns:minmax(0,1fr) 276px}.opacity-preview-card{grid-template-rows:auto 320px auto}.opacity-stage{padding:14px}.opacity-use-cases{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px}}@media (width<=960px){.opacity-workspace-body{grid-template-columns:1fr}.opacity-control-panel{border-top:1px solid var(--line);border-left:0}}@media (width<=850px){.opacity-overlay-footer{flex-direction:column;align-items:flex-start;gap:16px}.opacity-page .related-grid{grid-template-columns:1fr;gap:12px}.opacity-page .related-card{grid-template-columns:48px minmax(0,1fr);gap:14px 18px;padding:22px;display:grid}.opacity-related-action{grid-column:2}.opacity-guide-grid{gap:30px}}@media (width<=600px){.opacity-overlay-comparison{grid-template-columns:1fr;gap:22px}.opacity-overlay-heading h3{font-size:19px}.opacity-overlay-footer{padding:18px}.opacity-overlay-footer .button{max-width:100%}.opacity-preview-grid{grid-template-columns:1fr}.opacity-preview-card+.opacity-preview-card{border-top:1px solid var(--line);border-left:0}.opacity-preview-card{grid-template-rows:auto 240px auto}.opacity-preview-footer{padding-inline:12px}.opacity-use-cases{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 20px}.opacity-use-case h3{font-size:15px}.opacity-use-case p{font-size:12px}.opacity-examples,.opacity-steps,.opacity-guide-grid,.opacity-page .related-grid{grid-template-columns:1fr}.opacity-page .related-card{grid-template-columns:44px minmax(0,1fr);gap:12px 14px;padding:20px 18px}.opacity-related-icon{width:44px;height:44px}.opacity-related-copy h3{font-size:17px}.opacity-page .seo-section{padding:35px 0}}@media (prefers-reduced-motion:reduce){.opacity-page *,.opacity-page :before,.opacity-page :after{scroll-behavior:auto;transition:none}}