.brand{text-decoration:none;color:var(--ink)}.breadcrumb{font-size:13px;color:var(--ink-dim);padding-top:24px}.breadcrumb a,.content a{color:var(--chroma);text-underline-offset:3px}.hero{padding-top:28px}h1{font-size:clamp(36px,5.6vw,62px);line-height:1.08}.eyebrow{color:var(--chroma);font:12px var(--mono);text-transform:uppercase;letter-spacing:.12em}.trust{font-size:13px;color:var(--ink-dim);margin:18px 0 28px}.banner-tool{border:1px solid var(--line);border-radius:18px;padding:clamp(16px,3vw,28px);background:var(--bg-2);scroll-margin-top:18px}.step-heading{font:14px var(--mono);color:var(--chroma);margin:0 0 18px}.step-heading span{color:var(--ink);font:600 18px system-ui;margin-left:10px}.preset-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.preset{font:inherit;text-align:left;color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px;cursor:pointer}.preset strong,.preset span{display:block}.preset span{font:12px var(--mono);color:var(--ink-dim);margin-top:5px}.preset.active{border-color:var(--chroma);background:#11251b}.hint{color:var(--ink-dim);font-size:12px;line-height:1.65}.editor-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(235px,1fr);gap:24px;margin-top:20px}.stage-column{min-width:0}.upload-zone{display:flex;align-items:center;justify-content:center;flex-direction:column;gap:7px;border:1px dashed #566473;min-height:206px;padding:18px;text-align:center;border-radius:10px;background:repeating-conic-gradient(var(--check-a) 0% 25%,var(--check-b) 0% 50%) 0 0/24px 24px;cursor:pointer}.upload-zone.drag{border-color:var(--chroma)}.upload-zone>span:not(.upload-icon){font-size:12px;color:var(--ink-dim)}.upload-icon{font-size:28px;color:var(--chroma)}.upload-zone input{width:100%;max-width:280px;font-size:12px;color:var(--ink-dim)}input::file-selector-button{border:0;border-radius:6px;background:var(--chroma);padding:8px;margin-right:8px;color:#06130b;font-weight:600;cursor:pointer}.preview-wrap{position:relative;margin-top:16px;background:repeating-conic-gradient(var(--check-a) 0% 25%,var(--check-b) 0% 50%) 0 0/20px 20px;overflow:hidden;border:1px solid var(--line);border-radius:7px}#banner-canvas{display:block;width:100%;height:auto}#safe-guide{position:absolute;left:0;right:0;top:0;height:8.8889%;border-bottom:1px dashed var(--chroma);font-size:10px;line-height:1.2;color:white;background:#0008;pointer-events:none;overflow:hidden}fieldset{border:0;min-width:0;padding:0;margin:0}legend{font-size:16px;font-weight:700;margin-bottom:12px}fieldset label{display:block;font-size:13px;margin:10px 0 5px}fieldset output{float:right;color:var(--ink-dim);font:12px var(--mono)}select{width:100%;padding:10px;border:1px solid #3a4552;background:var(--panel);color:var(--ink);border-radius:7px;font:13px system-ui}input[type=range]{width:100%;accent-color:var(--chroma);min-height:24px}input[type=color]{vertical-align:middle;float:right;width:35px;height:25px;padding:1px;background:var(--panel);border:1px solid var(--line)}fieldset button{width:100%;margin-top:10px;min-height:44px}fieldset:disabled{opacity:.55}#output-status{font:12px/1.6 var(--mono);color:var(--chroma);overflow-wrap:anywhere}#error{color:#ff879a;background:#421c25;border-radius:7px;padding:10px;font-size:13px}.size-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.size-cards article{border-top:1px solid var(--line);padding-top:12px}.size-cards h3{font-size:17px}.size-cards p{font-size:14px}.size-cards .dimension{font:600 19px var(--mono);color:var(--chroma)}.content{overflow-wrap:anywhere}.content details h3{display:inline;font-size:16px}.content details{padding:14px 0}.site-foot nav{flex-wrap:wrap}button:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--chroma);outline-offset:4px}[hidden]{display:none!important}@media(max-width:680px){.editor-grid{grid-template-columns:1fr}.size-cards{grid-template-columns:1fr}.preset-grid{gap:6px}.preset{padding:9px 7px}.preset strong{font-size:12px}.preset span{font-size:10px}.head-nav{gap:12px}.head-nav a{font-size:12px}.brand{font-size:16px}.site-head{padding:16px}.hero .lede{font-size:15px}.banner-tool{padding:14px}.upload-zone{min-height:168px}.trust{font-size:11px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

.site-foot nav{display:flex;justify-content:center;gap:12px 20px;padding:10px 18px}.site-foot nav a{color:var(--ink-dim);font-size:13px;text-underline-offset:3px}.site-foot nav a:hover{color:var(--chroma)}