:root { font-family: Georgia, 'Times New Roman', serif; color: var(--ct-text); background: var(--ct-page); }
* { box-sizing: border-box; }
body { margin: 0; }
a { color: var(--ct-link); }
button { font: 14px system-ui; min-height: 44px; padding: 9px 15px; border: 1px solid var(--ct-border-control); border-radius: 7px; color: var(--ct-text); background: var(--ct-surface); cursor: pointer; }
button:hover { background: var(--ct-hover); }
a:focus-visible,button:focus-visible,input:focus-visible { outline: 3px solid var(--ct-focus); outline-offset: 4px; }
.skip-link { position: absolute; top: -70px; left: 12px; z-index: 5; padding: 12px; background: var(--ct-surface); }
.skip-link:focus { top: 8px; }
.home-header { max-width: 1240px; margin: auto; padding: 30px 30px 22px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--ct-border); }
.brand { font-size: 29px; font-weight: bold; color: inherit; text-decoration: none; }
.brand span { display: block; font: 9px system-ui; letter-spacing: 2.1px; color: var(--ct-text-muted); margin-top: 7px; }
main { max-width: 1240px; padding: 0 30px; margin: auto; }
.introduction { padding: 68px 0 52px; max-width: 800px; }
.eyebrow { font: 10px/1.5 system-ui; letter-spacing: 1.8px; text-transform: uppercase; color: var(--ct-text-muted); margin: 0 0 13px; }
h1 { font-size: clamp(40px,5.4vw,66px); line-height: 1.08; font-weight: normal; letter-spacing: -1.7px; margin: 0 0 23px; }
h1 em { color: var(--ct-accent); font-weight: normal; }
.lead { font-size: 18px; line-height: 1.65; color: var(--ct-text-secondary); max-width: 640px; margin: 0; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; padding-bottom: 16px; }
.section-heading h2 { font-size: 22px; font-weight: normal; margin: 0; }
.section-heading>span { font: 11px system-ui; color: var(--ct-text-muted); }
.tool-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 24px; }
.tool-card { display: flex; flex-direction: column; min-width: 0; color: inherit; text-decoration: none; border: 1px solid var(--ct-border-control); border-radius: 13px; overflow: hidden; background: var(--ct-surface); transition: transform .16s,border-color .16s; }
.tool-card:hover { transform: translateY(-3px); border-color: var(--ct-accent); }
.card-preview { height: 215px; border-bottom: 1px solid var(--ct-border); background: var(--ct-lane); overflow: hidden; display: flex; align-items: center; justify-content: center; }
.card-preview>svg { width: 90%; max-height: 100%; }
.preview-path { stroke: var(--ct-relationship); }
.preview-split { stroke: var(--ct-relationship-split); }
.preview-node { fill: var(--ct-surface); stroke: var(--ct-node-border); stroke-width: 2.5; }
.preview-label { fill: var(--ct-text-muted); font: 8px system-ui; letter-spacing: 1.3px; }
.book-preview { display: flex; width: 80%; height: 170px; background: var(--ct-surface); border: 1px solid var(--ct-border-control); border-radius: 6px 6px 0 0; align-self: flex-end; }
.book-margin { flex: 0 0 40px; padding-top: 29px; text-align: center; border-right: 1px solid var(--ct-border); color: var(--ct-text-muted); font-size: 19px; }
.book-page { flex: 1; min-width: 0; padding: 25px 24px; }
.book-page>span { font: 7px system-ui; letter-spacing: 1.6px; color: var(--ct-text-muted); }
.book-page h3 { font-size: 21px; font-weight: normal; margin: 10px 0 15px; }
.reading-line { height: 3px; width: 82%; margin: 8px 0; background: var(--ct-border); }
.reading-line.long { width: 100%; }
.reading-line.short { width: 60%; }
.page-mark { display: flex; justify-content: space-between; font: 7px system-ui; color: var(--ct-text-muted); margin-top: 12px; letter-spacing: 1px; }
.card-copy { padding: 26px 28px; flex: 1; display: flex; flex-direction: column; }
.card-copy h3 { font-size: 29px; font-weight: normal; line-height: 1.15; margin: 0 0 14px; }
.card-copy>p:not(.eyebrow) { font: 14px/1.7 system-ui; color: var(--ct-text-secondary); margin: 0 0 20px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: auto 0 25px; }
.tags li { border: 1px solid var(--ct-border); border-radius: 20px; padding: 5px 9px; font: 10px system-ui; color: var(--ct-text-secondary); }
.card-action { display: flex; justify-content: space-between; font: 600 13px system-ui; color: var(--ct-accent); border-top: 1px solid var(--ct-border); padding-top: 17px; }
.growing-note { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 45px 0; margin-top: 40px; border-top: 1px solid var(--ct-border); }
.growing-note h2 { font-size: 24px; font-weight: normal; margin: 0 0 10px; }
.growing-note p:not(.eyebrow) { font: 13px/1.7 system-ui; color: var(--ct-text-secondary); max-width: 560px; margin: 0; }
.growing-note>a { flex-shrink: 0; font: 12px system-ui; padding: 12px 0; }
.home-footer { max-width: 1240px; margin: auto; padding: 22px 30px 30px; border-top: 1px solid var(--ct-border); display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.home-footer>span { font-weight: bold; }
.home-footer p { font: 11px/1.5 system-ui; color: var(--ct-text-muted); }
@media (max-width: 700px) {
 .home-header { padding: 23px 18px 18px; }
 .brand { font-size: 25px; }
 main { padding: 0 18px; }
 .introduction { padding: 42px 0 35px; }
 h1 { letter-spacing: -1px; }
 .lead { font-size: 16px; }
 .tool-grid { grid-template-columns: 1fr; gap: 20px; }
 .card-preview { height: 190px; }
 .card-copy { padding: 23px; }
 .card-copy h3 { font-size: 27px; }
 .book-page { padding: 24px 15px; }
 .book-page h3 { font-size: 18px; }
 .growing-note { align-items: flex-start; flex-direction: column; gap: 15px; padding: 30px 0; margin-top: 30px; }
 .home-footer { padding: 20px 18px; flex-direction: column; align-items: flex-start; gap: 0; }
 .home-header #theme-open { position: static; }
}
@media (prefers-reduced-motion: reduce) { .tool-card { transition: none; } }

.home-header #theme-open { position: static; }