/* Innovate Hub — checklists for desktop players. One stylesheet, no external resources. */

:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --tint: #eceafb;
  --ink: #14161c;
  --muted: #474d5c;
  --line: #dfe3ee;
  --line-strong: #c2c9dc;
  --accent: #3a35bd;
  --accent-deep: #2b2790;
  --teal: #0f6157;
  --teal-tint: #e2f1ed;
  --amber-tint: #fdf3e0;
  --amber-line: #b46a06;
  --r: 12px;
  --r-sm: 8px;
  --shadow: 0 1px 2px rgba(20, 22, 28, .06), 0 6px 20px rgba(20, 22, 28, .06);
  --shadow-sm: 0 1px 2px rgba(20, 22, 28, .07);
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.68 var(--sans);
  overflow-wrap: break-word;
}

h1, h2, h3, h4 { font-family: var(--sans); font-weight: 700; line-height: 1.2; letter-spacing: -.018em; }
h1 { font-size: clamp(1.95rem, 1.3rem + 2.6vw, 2.9rem); margin: 0 0 .7rem; }
h2 { font-size: clamp(1.35rem, 1.1rem + 1.2vw, 1.75rem); margin: 2.8rem 0 .8rem; }
h3 { font-size: 1.12rem; margin: 1.7rem 0 .45rem; letter-spacing: -.01em; }
p { margin: 0 0 1.1rem; }
ul, ol { margin: 0 0 1.1rem; padding-left: 1.35rem; }
li { margin: 0 0 .5rem; }

a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 3px;
}

.ih-skip { position: absolute; left: -9999px; z-index: 60; background: var(--ink); color: #fff; padding: .75rem 1rem; text-decoration: none; border-radius: 0 0 var(--r-sm) 0; }
.ih-skip:focus { left: 0; top: 0; }

/* header */
.ih-head { position: sticky; top: 0; z-index: 40; background: rgba(244, 246, 251, .94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.ih-headin { max-width: 68rem; margin: 0 auto; padding: .6rem 1rem; display: flex; align-items: center; gap: .75rem; flex-wrap: wrap; }
.ih-brand { display: inline-flex; align-items: center; gap: .55rem; text-decoration: none; color: var(--ink); }
.ih-logo { display: grid; place-items: center; width: 2.15rem; height: 2.15rem; border-radius: var(--r-sm); background: var(--accent); color: #fff; font-weight: 700; font-size: .85rem; letter-spacing: .02em; }
.ih-bname { font-weight: 700; font-size: 1.1rem; letter-spacing: -.02em; }
.ih-tog { margin-left: auto; font: 600 .95rem/1 var(--sans); color: var(--ink); background: var(--surface); border: 1px solid var(--line-strong); border-radius: 999px; padding: .55rem 1rem; cursor: pointer; box-shadow: var(--shadow-sm); }
.ih-nav { display: none; width: 100%; padding: .4rem 0 .5rem; }
.ih-nav.is-open { display: flex; flex-direction: column; }
.ih-nav a { padding: .6rem .2rem; font-weight: 600; font-size: .98rem; color: var(--ink); text-decoration: none; border-top: 1px solid var(--line); }
.ih-nav a:hover { color: var(--accent); text-decoration: underline; }
.ih-nav a[aria-current="page"] { color: var(--accent); text-decoration: underline; }
@media (min-width: 52rem) {
  .ih-tog { display: none; }
  .ih-nav { display: flex; width: auto; margin-left: auto; gap: .35rem; padding: 0; }
  .ih-nav a { border-top: 0; padding: .5rem .8rem; border-radius: 999px; }
  .ih-nav a:hover { background: var(--tint); text-decoration: none; }
}

/* layout — centred single column */
.ih-main { max-width: 46rem; margin: 0 auto; padding: 2.2rem 1rem 3rem; }
.ih-wide { max-width: 68rem; margin: 0 auto; padding: 2.2rem 1rem 3rem; }
.ih-lead { font-size: 1.15rem; color: var(--muted); margin-bottom: 1.4rem; }
.ih-eyebrow { font-size: .82rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--accent); margin: 0 0 .55rem; }
.ih-eff { font-size: .93rem; color: var(--muted); margin-bottom: 1.6rem; }

/* hero key-points strip */
.ih-keys { list-style: none; margin: 1.6rem 0 0; padding: 0; display: grid; gap: .75rem; }
@media (min-width: 42rem) { .ih-keys { grid-template-columns: repeat(3, 1fr); } }
.ih-keys li { margin: 0; background: var(--surface); border-radius: var(--r); padding: .9rem 1rem; box-shadow: var(--shadow-sm); }
.ih-keys strong { display: block; font-size: .95rem; margin-bottom: .15rem; }
.ih-keys span { font-size: .92rem; color: var(--muted); }

/* disclosure */
.ih-disc { background: var(--tint); border-radius: var(--r); padding: 1.25rem 1.35rem; margin: 2rem 0; box-shadow: inset 0 0 0 2px var(--accent); }
.ih-disc h2 { margin: 0 0 .55rem; font-size: 1.15rem; }
.ih-disc p { margin: 0 0 .75rem; }
.ih-disc p:last-child { margin: 0; }

/* cta */
.ih-ctabox { background: var(--surface); border-radius: var(--r); padding: 1.15rem 1.3rem; margin: 1.9rem 0; box-shadow: var(--shadow); }
.ih-ctanote { margin: 0 0 .85rem; font-size: .96rem; color: var(--muted); }
.ih-cta { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; font-weight: 650; padding: .78rem 1.35rem; border-radius: 999px; box-shadow: var(--shadow-sm); }
.ih-cta:hover { background: var(--accent-deep); text-decoration: underline; }

/* body units */
.ih-quick { background: var(--teal-tint); border-radius: var(--r); padding: 1rem 1.2rem; margin: 1.6rem 0; }
.ih-quick p { margin: 0; }

.ih-check { background: var(--surface); border-radius: var(--r); padding: 1.15rem 1.3rem; margin: 1.8rem 0; box-shadow: var(--shadow-sm); }
.ih-check h3 { margin: 0 0 .7rem; font-size: 1.05rem; }
.ih-check ul { list-style: none; padding: 0; margin: 0; }
.ih-check li { position: relative; padding-left: 1.85rem; margin-bottom: .6rem; }
.ih-check li:last-child { margin-bottom: 0; }
.ih-check li::before { content: ""; position: absolute; left: .15rem; top: .05rem; width: 1.1rem; height: 1.1rem; border: 2px solid var(--line-strong); border-radius: 4px; }

.ih-steps { list-style: none; counter-reset: s; padding: 0; margin: 1.8rem 0; }
.ih-steps li { counter-increment: s; position: relative; padding-left: 3rem; margin-bottom: 1.2rem; }
.ih-steps li::before { content: counter(s); position: absolute; left: 0; top: .1rem; width: 2.1rem; height: 2.1rem; display: grid; place-items: center; background: var(--accent); color: #fff; border-radius: 50%; font-weight: 700; font-size: .95rem; }
.ih-steps h3 { margin: .15rem 0 .25rem; font-size: 1.05rem; }
.ih-steps p { margin: 0; }

.ih-worked { background: var(--surface); border-radius: var(--r); padding: 1.2rem 1.35rem; margin: 1.9rem 0; box-shadow: var(--shadow); border-top: 4px solid var(--teal); }
.ih-worked h3 { margin: 0 0 .6rem; font-size: 1.08rem; }
.ih-worked p:last-child, .ih-worked ul:last-child, .ih-worked table:last-child { margin-bottom: 0; }

.ih-warn { background: var(--amber-tint); border-radius: var(--r); padding: 1.1rem 1.3rem; margin: 1.9rem 0; box-shadow: inset 0 0 0 1px var(--amber-line); }
.ih-warn h3 { margin: 0 0 .6rem; font-size: 1.05rem; }
.ih-warn ul { margin-bottom: 0; }

.ih-tw { overflow-x: auto; margin: 1.7rem 0; border-radius: var(--r); box-shadow: var(--shadow-sm); background: var(--surface); }
table { border-collapse: collapse; width: 100%; min-width: 30rem; }
caption { text-align: left; padding: .9rem 1.1rem .2rem; font-size: .93rem; color: var(--muted); }
th, td { text-align: left; padding: .72rem 1.1rem; border-bottom: 1px solid var(--line); font-size: .97rem; vertical-align: top; }
thead th { font-size: .85rem; letter-spacing: .05em; text-transform: uppercase; color: var(--muted); }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }

.ih-faq { margin: 1.7rem 0; }
.ih-faq details { background: var(--surface); border-radius: var(--r-sm); margin-bottom: .6rem; box-shadow: var(--shadow-sm); }
.ih-faq summary { cursor: pointer; padding: .9rem 1.1rem; font-weight: 650; list-style: none; }
.ih-faq summary::-webkit-details-marker { display: none; }
.ih-faq summary::after { content: "+"; float: right; color: var(--accent); font-weight: 700; }
.ih-faq details[open] summary::after { content: "\2212"; }
.ih-faq .ih-a { padding: 0 1.1rem 1rem; }
.ih-faq .ih-a p:last-child { margin: 0; }

.ih-defs dt { font-weight: 700; margin-top: 1.25rem; }
.ih-defs dd { margin: .2rem 0 0; color: var(--muted); }

.ih-toc { background: var(--surface); border-radius: var(--r); padding: 1.1rem 1.3rem; margin: 1.8rem 0 2.2rem; box-shadow: var(--shadow-sm); }
.ih-toc h2 { margin: 0 0 .5rem; font-size: 1rem; }
.ih-toc ol { margin: 0; padding-left: 1.25rem; }
.ih-toc li { margin-bottom: .3rem; font-size: .96rem; }

.ih-index { list-style: none; padding: 0; margin: 1.6rem 0; display: grid; gap: .9rem; }
@media (min-width: 42rem) { .ih-index { grid-template-columns: repeat(2, 1fr); } }
.ih-index li { margin: 0; background: var(--surface); border-radius: var(--r); padding: 1.05rem 1.2rem; box-shadow: var(--shadow-sm); }
.ih-index h3 { margin: 0 0 .3rem; font-size: 1.04rem; }
.ih-index p { margin: 0; font-size: .95rem; color: var(--muted); }

.ih-more { margin-top: 3rem; padding-top: 1.6rem; border-top: 1px solid var(--line-strong); }
.ih-more h2 { margin-top: 0; font-size: 1.1rem; }
.ih-morelist { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.ih-morelist li { margin: 0; }
.ih-morelist a { display: inline-block; background: var(--surface); padding: .45rem .9rem; border-radius: 999px; font-size: .93rem; text-decoration: none; box-shadow: var(--shadow-sm); }
.ih-morelist a:hover { background: var(--tint); text-decoration: underline; }

.ih-src { font-size: .94rem; color: var(--muted); }
.ih-crumb { font-size: .88rem; color: var(--muted); margin: 0 0 1rem; }
.ih-crumb a { color: var(--muted); }

/* footer */
.ih-foot { background: var(--surface); border-top: 1px solid var(--line-strong); margin-top: 3.5rem; }
.ih-footin { max-width: 68rem; margin: 0 auto; padding: 2.4rem 1rem 2.8rem; }
.ih-fcols { display: grid; gap: 1.6rem; margin-bottom: 2rem; }
@media (min-width: 42rem) { .ih-fcols { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 34rem; } }
.ih-fcol h2 { margin: 0 0 .6rem; font-size: .84rem; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); }
.ih-fcol ul { list-style: none; padding: 0; margin: 0; }
.ih-fcol li { margin-bottom: .4rem; font-size: .95rem; }
.ih-pub { border-top: 1px solid var(--line); padding-top: 1.5rem; }
.ih-pub p { margin: 0 0 .22rem; font-size: .95rem; }
.ih-pubname { font-weight: 700 !important; font-size: 1.05rem !important; margin-bottom: .5rem !important; }
.ih-plinks { margin-top: 1rem !important; }
.ih-plinks span { color: var(--line-strong); }
.ih-tm { margin-top: 1rem !important; font-size: .89rem; color: var(--muted); max-width: 54rem; }
.ih-rev { margin-top: .7rem !important; font-size: .89rem; color: var(--muted); }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }