:root {
  color-scheme: light;
  --bg: #daeaf6;
  --panel: rgba(255,255,255,0.72);
  --panel-strong: rgba(255,255,255,0.94);
  --panel-border: rgba(20,28,42,0.12);
  --accent-primary: #4F63D8;
  --text: #12161f;
  --text-muted: #596272;
  --radius-lg: 22px;
  font-family: 'Inter', Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
}
html { scrollbar-gutter: stable both-edges; }
body {
  margin: 0;
  min-height: 100svh;
  background: linear-gradient(180deg, #ffffff 0%, #e6f2fe 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
main { max-width: 1100px; margin: auto; padding: clamp(16px, 4vw, 48px); }
h1 { font-size: clamp(24px, 3vw, 36px); font-weight: 700; letter-spacing: -0.035em; line-height: 1.15; margin: 0 0 12px; }
form { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin: 24px 0 8px; }
label { font-size: 14px; font-weight: 500; }
select, button { appearance: none; -webkit-appearance: none; box-sizing: border-box; font: inherit; line-height: 1.2; height: 44px; padding: 8px 12px; border: 1px solid var(--panel-border); border-radius: 10px; background: #ffffff; color: var(--text); max-width: 100%; }
select { padding-right: 34px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='m1 1 5 5 5-5' fill='none' stroke='%23596272' stroke-width='1.5'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; }
button {
  cursor: pointer;
  border-color: rgba(20,28,42,0.13);
  background-color: rgba(233,237,244,0.88);
  background-image: linear-gradient(180deg, rgba(255,255,255,0.64), rgba(255,255,255,0.18));
  color: #303744;
  font-weight: 500;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.62);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
button:hover {
  border-color: rgba(20,28,42,0.15);
  background-color: rgba(241,245,250,0.96);
  background-image: linear-gradient(180deg, rgba(255,255,255,0.35), rgba(255,255,255,0.19));
  color: var(--text);
}
:focus-visible { outline: 3px solid var(--accent-primary); outline-offset: 3px; }
h2 { font-family: 'IBM Plex Mono', monospace; font-size: 15px; font-weight: 500; color: var(--text-muted); margin: 0 0 12px; }
#date-status { font-size: 13px; line-height: 1.5; color: var(--text-muted); }
.banner-grid { display: grid; gap: 28px; align-items: start; justify-content: center; grid-template-columns: minmax(0, 1fr); max-width: 816px; margin: 28px 0 0; }
.banner-grid section { min-width: 0; text-align: center; }
.banner-viewport { position: relative; max-width: 100%; margin-inline: auto; overflow: hidden; }
.banner-viewport[data-width="300"] { width: 300px; }
.banner-viewport[data-width="160"] { width: 160px; }
.banner-viewport[data-width="728"] { width: 728px; }
iframe { border: 0; display: block; transform-origin: top left; }
@media (min-width: 980px) { .banner-grid { grid-template-columns: 300px 300px 160px; } .leaderboard { grid-column: 1 / -1; } }

.campaign-intro { margin:0; max-width:70ch; color:var(--text-muted); font-size:14px; line-height:1.5; }
.banner-grid { row-gap:64px; }

.system-eyebrow { margin:0 0 12px; font-size:14px; font-weight:500; color:var(--text-muted); }
.size-input { display:flex; flex-wrap:wrap; align-items:baseline; gap:12px 24px; margin:28px 0 36px; }
.size-input code { font:clamp(18px,2.3vw,25px) 'IBM Plex Mono',monospace; }
.size-input span { font-size:13px; color:var(--text-muted); }
.template-diagram { position:relative; display:grid; gap:28px; }
.diagram-banner { grid-row:1; }
.callout { position:relative; min-width:0; }
.callout h2, .system-payoff h2 { font-family:inherit; font-size:16px; font-weight:600; color:var(--text); line-height:1.4; margin:0 0 8px; }
.callout p, .system-payoff p { font-size:13px; line-height:1.65; margin:0; color:var(--text-muted); }
.callout code { font: .9em 'IBM Plex Mono',monospace; overflow-wrap:anywhere; }
.callout .object-name { display:block; font-size:11px; margin-top:8px; color:var(--text-muted); }
.diagram-arrows { position:absolute; inset:0; width:100%; height:100%; overflow:visible; pointer-events:none; }
.diagram-arrows path { fill:none; stroke:#667585; stroke-width:1.25; }
.diagram-arrows .connector { display:none; }
.system-payoff { display:grid; gap:24px; max-width:960px; margin:40px 0; padding-block:24px; border-block:1px solid var(--panel-border); }
.adaptation-grid { max-width:816px; }
@media(min-width:620px) and (max-width:979px) {
  .template-diagram { grid-template-columns: minmax(220px,300px) minmax(0,1fr); column-gap:48px; row-gap:24px; align-items:start; }
  .diagram-banner { grid-column:1; grid-row:1 / 7; align-self:center; width:100%; }
  .callout { grid-column:2; }
  .callout-stage { grid-row:1; }
  .callout-logo { grid-row:2; }
  .callout-center { grid-row:3; }
  .callout-background { grid-row:4; }
  .callout-offer { grid-row:5; }
  .callout-cta { grid-row:6; }
  .diagram-arrows .connector { display:block; }
}
@media(min-width:980px) {
  .template-diagram { grid-template-columns:minmax(0,1fr) 300px minmax(0,1fr); grid-template-rows:repeat(6,100px); column-gap:44px; row-gap:0; }
  .diagram-banner { grid-column:2; grid-row:1 / 7; }
  .callout-stage { grid-column:1; grid-row:1 / 3; align-self:start; }
  .callout-center { grid-column:1; grid-row:3 / 5; align-self:start; }
  .callout-background { grid-column:1; grid-row:5 / 7; align-self:start; }
  .callout-logo { grid-column:3; grid-row:1 / 3; align-self:start; }
  .callout-offer { grid-column:3; grid-row:3 / 5; align-self:center; }
  .callout-cta { grid-column:3; grid-row:5 / 7; align-self:end; }
  .diagram-arrows .connector { display:block; }
  .system-payoff { grid-template-columns:1fr 1fr; gap:44px; }
  .adaptation-grid { grid-template-columns:300px 160px 188px; justify-content:start; gap:64px 40px; }
  .adaptation-grid .leaderboard { grid-column:1 / -1; width:728px; max-width:100%; }
}

.system-result { max-width:65ch; margin:16px 0 0; font-size:17px; line-height:1.55; color:var(--text-muted); }