@charset "UTF-8";
:root { color-scheme: light; font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #263a31; background: #fff; --line: #d4ddd2; --page-surface: #fff; --page-hover: #f2f7ed; --page-focus: #b4cc45; --practice-bg: #eef4e9; --notice-bg: #fff4d8; --notice-fg: #754216; --notice-line: #e5cd95; }
:root[data-theme="blueprint"] { color-scheme: dark; color: #e8f4ff; --line: #6c99b0; --page-surface: #0b2b41; --page-hover: #143a52; --page-focus: #ffe169; --practice-bg: #0b263d; --notice-bg: #3f341b; --notice-fg: #ffe4a4; --notice-line: #a38d4d; background: linear-gradient(#2d587d33 1px, transparent 1px), linear-gradient(90deg, #2d587d33 1px, transparent 1px), #102641; background-size: 24px 24px; }
* { box-sizing: border-box; }
body { margin: 0; height: 100vh; height: 100dvh; min-height: 0; display: flex; flex-direction: column; }
a { color: inherit; }
button, select { font: inherit; }
button, select, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; background: var(--page-surface); border: 1px solid var(--line); border-radius: 7px; padding: 7px 10px; min-height: 36px; cursor: pointer; font-size: 12px; }
button:hover { border-color: currentColor; background: var(--page-hover); }
button:focus-visible, select:focus-visible, a:focus-visible, #practice:focus-visible { outline: 3px solid var(--page-focus); outline-offset: 3px; }
.skip-link { position: fixed; top: -100px; left: 12px; background: var(--page-surface); padding: 12px; z-index: 20; }
.skip-link:focus { top: 12px; }
.masthead { flex-shrink: 0; padding: 14px 24px 0; }
.brand { display: inline-flex; text-decoration: none; }
.brand-logo { display: block; width: auto; height: 50px; }
main { flex: 1; min-height: 0; display: flex; flex-direction: column; gap: 6px; padding: 4px 24px 12px; }
.guide-frame { flex-shrink: 0; height: 1px; max-height: min(240px, 35dvh); overflow: auto; overscroll-behavior: contain; scrollbar-width: thin; }
#guide { display: block; min-width: 100%; height: 1px; --lf-font-size: 14px; --lf-node-shadow: none; }
.practice-frame { position: relative; display: flex; flex-direction: column; flex: 1; min-height: 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--practice-bg); }
#flow { display: block; flex: 1; min-height: 0; width: 100%; height: 0; --lf-bg: #eef4e9; --lf-canvas-background: #eef4e9; }
#flow[theme="blueprint"] { --lf-bg: #102641; --lf-canvas-background: linear-gradient(#2d587d33 1px, transparent 1px), linear-gradient(90deg, #2d587d33 1px, transparent 1px), #0b263d; }
.demo-settings { border-top: 1px solid var(--line); padding-top: 12px; margin-top: 12px; font-size: 12px; line-height: 1.5; }
.appearance { display: flex; align-items: center; gap: 8px; }
select { border: 1px solid var(--line); border-radius: 7px; padding: 6px 22px 6px 8px; background: var(--page-surface); color: inherit; font-size: 12px; }
.item-count { margin-left: auto; font: 11px ui-monospace, SFMono-Regular, Consolas, monospace; white-space: nowrap; }
.item-count.full { color: #a84b25; font-weight: bold; }
#save-status { margin: 9px 0; }
#save-status::before { content: "●"; color: #538763; margin-right: 6px; }
#save-status[data-mode="unavailable"]::before, #save-status[data-mode="protected"]::before { color: #bf7431; }
.reset-controls { display: flex; flex-wrap: wrap; gap: 6px; }
.demo-settings button, .demo-settings select { color: var(--lf-fg, #263a31); background: var(--lf-ui-bg, #fff); border-color: var(--lf-ui-border, #d4ddd2); }
.demo-settings button:hover { background: var(--lf-ui-hover, #f2f7ed); }
#hard-reset { color: color-mix(in srgb, var(--lf-fg, #263a31) 85%, #ef6f4b); }
.source-link { display: inline-block; margin-top: 10px; font-size: 11px; }
.notice { flex-shrink: 0; padding: 10px 12px; margin: 0 10px 10px; font-size: 12px; line-height: 1.45; color: var(--notice-fg); background: var(--notice-bg); border: 1px solid var(--notice-line); border-radius: 8px; }
.tab-notice { display: flex; align-items: center; gap: 12px; justify-content: space-between; }
.tab-notice button { flex-shrink: 0; background: var(--notice-bg); color: var(--notice-fg); }
[hidden] { display: none !important; }
@media (max-width: 700px) { .masthead { padding: 12px 12px 0; } .brand-logo { height: 42px; } main { padding: 4px 10px 10px; gap: 6px; } .tab-notice { align-items: start; flex-direction: column; gap: 8px; } }