/* Site-specific overrides on top of the Butterfly theme.
   Mobile first: the base rules target phones, min-width queries widen them. */

:root {
  --accent: #2c8ff2;
  --ink: #222;
  --muted: #666;
  --line: #e6e6e6;
  --soft: #f6f8fb;
  --buybar-h: 56px;
}

html { scroll-behavior: smooth; }
body { color: var(--muted); padding-bottom: var(--buybar-h); }
section[id], header + section { scroll-margin-top: 72px; }
img { max-width: 100%; height: auto; }

/* Headings: smaller on phones, theme sizes from tablet up */
h1 { font-size: 30px; margin: 10px 0 20px; }
h2 { font-size: 26px; margin: 0 0 20px; line-height: 1.2; }
.section-lead { text-align: center; font-size: 17px; max-width: 720px; margin: 0 auto 30px; line-height: 1.6; }

/* Header: one line on phones, short and sticky */
#header_outer { padding: 12px 0; }
.logo { font-size: 1.25em; padding-top: 0.15em; white-space: nowrap; }
.logo a { color: var(--accent); }
.res-nav_click { margin-top: 0; }

/* Hero */
.top_content { padding-top: 20px; }
.top_left_cont p { font-size: 16px; line-height: 1.6; }
.hero-meta { margin: 18px 0 0; font-size: 14px; color: var(--muted); }

/* Generic section rhythm */
#service, #work_outer, .main-section.team, .jbc-section { padding: 48px 0; }
.service_area { padding: 10px 0; }
.c-logo-part { margin-top: 0; padding: 30px 0; }
.c-logo-part ul li.text-info { display: inline-block; margin: 6px 12px; }
.text-info strong { font-size: 2em; }

/* Alternating background for the new sections */
.jbc-section.alt { background: var(--soft); }
.jbc-section h2 { text-align: center; }

/* Card grid used by audience, courses, science, talks and press */
.jbc-grid { display: grid; grid-template-columns: 1fr; gap: 16px; margin: 0; padding: 0; list-style: none; }
.jbc-card {
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 18px 20px; text-align: left; font-size: 15px; line-height: 1.55;
}
.jbc-card h3 { font-size: 17px; margin: 0 0 6px; color: var(--ink); text-transform: none; font-family: 'Lato', sans-serif; font-weight: 700; }
.jbc-card p { margin: 0 0 6px; }
.jbc-card .meta { font-size: 13px; color: #888; }
.jbc-card a { word-break: break-word; }
.jbc-card ul { padding-left: 18px; margin: 6px 0 0; }
.jbc-card li { margin-bottom: 4px; }

/* University / organizer badge: logo when available, initials otherwise */
.badge-row { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.badge-row img { flex: none; height: 40px; width: 96px; object-fit: contain; object-position: left center; }
.badge-initials {
  flex: 0 0 44px; width: 44px; height: 44px; border-radius: 50%; margin-right: 52px;
  background: var(--accent); color: #fff; font-weight: 700; font-size: 14px;
  display: flex; align-items: center; justify-content: center;
}

/* Before / after comparison */
.ba-col h3 { display: flex; align-items: center; gap: 8px; }
.ba-col.before { border-top: 4px solid #e74c3c; }
.ba-col.after { border-top: 4px solid #27ae60; }

/* Talks timeline */
.talk-list { list-style: none; padding: 0; margin: 0; }
.talk-list li { display: flex; gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 15px; text-align: left; }
.talk-list time { flex: 0 0 92px; color: #888; font-variant-numeric: tabular-nums; }
.talk-list .where { color: var(--ink); }
.talk-list .meta { color: #888; font-size: 14px; }

/* Press: highlights as cards, the long tail collapsible and compact */
.press-more { margin-top: 24px; }
.press-more summary { cursor: pointer; text-align: center; color: var(--accent); font-weight: 700; font-size: 16px; padding: 10px; }
.press-list { columns: 1; column-gap: 32px; padding: 0; margin: 16px 0 0; list-style: none; text-align: left; font-size: 15px; }
.press-list li { break-inside: avoid; padding: 6px 0; }
.press-list .lang { font-weight: 700; color: var(--ink); margin-top: 12px; }

/* Store logos: wrap cleanly instead of overflowing */
.stores { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; list-style: none; padding: 0; margin: 0; }
.stores a.store { display: inline-flex; align-items: center; justify-content: center; width: 150px; height: 64px; margin: 0; }
.stores a.store img { height: 34px; width: auto; max-width: 120px; }

/* Awards side by side, not full width */
.awards { display: flex; flex-wrap: wrap; justify-content: center; gap: 24px; list-style: none; padding: 0; }
.awards img { display: block; width: 180px; margin: 8px auto 0; }

/* Sticky buy bar */
.buybar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 1000;
  height: var(--buybar-h); background: rgba(255,255,255,.97);
  border-top: 1px solid var(--line); box-shadow: 0 -2px 12px rgba(0,0,0,.06);
  display: flex; align-items: center; justify-content: center; gap: 8px; padding: 0 10px;
}
.buybar .label { display: none; color: var(--ink); font-weight: 700; margin-right: 6px; }
.buybar a {
  display: inline-flex; align-items: center; height: 38px; padding: 0 12px; border-radius: 19px;
  border: 1px solid var(--accent); color: var(--accent); font-weight: 700; font-size: 13px; white-space: nowrap; text-decoration: none;
}
.buybar a.primary { background: var(--accent); color: #fff; }
.buybar a:hover, .buybar a:focus { background: var(--accent); color: #fff; text-decoration: none; }
.buybar .long { display: none; }

/* FAQ */
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; margin-bottom: 10px; text-align: left; }
.faq summary { cursor: pointer; font-weight: 700; color: var(--ink); font-size: 16px; }
.faq details p { margin: 10px 0 0; font-size: 15px; line-height: 1.6; }

/* Phones: title left, hamburger right, menu drops below the header */
@media (max-width: 767px) {
  .header_section { position: relative; min-height: 32px; }
  .logo { float: left; margin: 0; }
  .res-nav_click { position: absolute; right: 0; left: auto; top: -2px; bottom: auto; font-size: 26px; }
  .nav { top: 44px; }
  .nav ul.toggle { box-shadow: 0 8px 16px rgba(0,0,0,.08); padding: 0; max-height: calc(100vh - 110px); overflow-y: auto; }
  .nav ul.toggle li { padding: 0; margin: 0; }
  .nav ul.toggle li a { display: block; padding: 10px 0; }
  .client_area { width: auto; padding: 0 16px; }
  .quote_section { width: auto; margin: 16px 0 0; float: none; }
  .quote_section p { width: auto; }
  .quote_arrow2, .quote_arrow { display: none; }
}
.c-logo-part { background-size: cover; }

.buybar .amz { color: var(--ink); font-size: 13px; font-weight: 700; margin-left: 4px; }

.all-items { margin: 20px 0 0; font-size: 16px; font-weight: 700; }

/* Grouped navigation: dropdowns on desktop, expanded lists in the phone menu */
.nav li.has-sub { position: relative; }
.nav .nav-group::after { content: " \25BE"; font-size: 11px; }
.nav ul.sub { display: none; position: absolute; top: 100%; left: -12px; z-index: 1002; min-width: 220px;
  background: #fff; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,.08);
  padding: 6px 0; margin: 0; text-align: left; }
.nav ul.sub li { display: block; float: none; margin: 0; padding: 0; }
.nav ul.sub li a { padding: 8px 16px; text-transform: none; font-family: 'Lato', sans-serif; font-weight: 400; font-size: 15px; white-space: nowrap; }
.nav ul.sub li a:hover { background: var(--soft); }
.nav li.has-sub:hover > ul.sub, .nav li.has-sub:focus-within > ul.sub { display: block; }
.nav li.has-sub::after { content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 10px; }
@media (max-width: 767px) {
  .nav ul.toggle ul.sub { display: block; position: static; border: 0; box-shadow: none; min-width: 0;
    padding: 0 0 6px; background: #fff; border-radius: 0; text-align: center; }
  .nav ul.toggle ul.sub li { border-bottom: 0; }
  .nav ul.toggle ul.sub li a { padding: 6px 0; font-size: 15px; color: #555; }
  .nav ul.toggle .nav-group { pointer-events: none; color: var(--accent); }
  .nav ul.toggle .nav-group::after { content: ""; }
}

/* Footer */
.footer_section { padding-bottom: 20px; }

@media (min-width: 600px) {
  .jbc-grid.cols-2, .jbc-grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
  .press-list { columns: 2; }
  .buybar .label { display: inline; font-size: 13px; }
  .buybar .long { display: inline; }
  .buybar .amz { display: none; }
}

@media (min-width: 992px) {
  h1 { font-size: 38px; }
  h2 { font-size: 34px; margin-bottom: 25px; }
  #header_outer { padding: 20px 0; }
  .logo { font-size: 1.5em; }
  #service, #work_outer, .main-section.team, .jbc-section { padding: 72px 0; }
  .jbc-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
  .press-list { columns: 3; }
}

/* Subpages: hero, prose, timeline, BibTeX */
.research-hero { background: var(--soft); padding: 40px 0 32px; text-align: center; }
.research-hero h1 { margin: 0 0 14px; }
.research-hero .section-lead { margin-bottom: 0; }
.prose { max-width: 760px; margin: 0 auto; font-size: 16px; line-height: 1.7; text-align: left; }
.prose h2 { text-align: left; margin-top: 8px; }
.prose ol, .prose ul { padding-left: 22px; }
.prose li { margin-bottom: 8px; }
.prose p { margin: 0 0 14px; }
.bibtex { background: #f4f4f4; border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; font-size: 13px; line-height: 1.5; white-space: pre; overflow-x: auto; color: #333; margin: 10px 0 0; }
.paper summary { cursor: pointer; color: var(--accent); font-weight: 700; margin-top: 8px; }
.stats { display: flex; flex-wrap: wrap; gap: 12px; margin: 16px 0; padding: 0; list-style: none; }
.stats li { flex: 1 1 140px; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px; text-align: center; margin: 0; }
.stats strong { display: block; font-size: 28px; color: var(--ink); }
.breadcrumb-nav { font-size: 14px; margin-bottom: 10px; }
.timeline { list-style: none; padding: 0; margin: 0; border-left: 3px solid var(--accent); }
.timeline > li { position: relative; padding: 0 0 28px 24px; margin: 0; }
.timeline > li::before { content: ""; position: absolute; left: -9px; top: 4px; width: 15px; height: 15px; border-radius: 50%; background: #fff; border: 3px solid var(--accent); }
.timeline .year { display: block; font-weight: 700; color: var(--accent); font-size: 15px; letter-spacing: .5px; }
.timeline h3 { margin: 2px 0 8px; font-size: 20px; color: var(--ink); text-transform: none; text-align: left; }
.figure-wide { margin: 18px 0; text-align: center; }
.figure-wide img { max-width: 100%; border: 1px solid var(--line); border-radius: 8px; }
.figure-wide figcaption { font-size: 14px; color: #888; margin-top: 6px; }

/* Sticky header on every page */
#header_outer { position: sticky; top: 0; z-index: 1000; }

/* Comparison pages (generated from src/main/java/views) */
.cmp h1 { text-align: left; }
.cmp-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 24px; }
.cmp-tabs a { padding: 6px 14px; border: 1px solid var(--line); border-radius: 18px; font-size: 14px; color: var(--ink); text-decoration: none; }
.cmp-tabs a.active, .cmp-tabs a:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.cmp-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; align-items: center; margin-bottom: 8px; font-size: 14px; }
.cmp-group { grid-column: 1 / -1; color: #888; font-weight: 700; }
.cmp-next { text-align: right; }
.cmp-title { font-size: 28px; text-transform: none; margin: 8px 0 24px; text-align: left; }
.cmp-book { display: grid; grid-template-columns: 1fr; gap: 20px; align-items: center; }
.cmp-book .book-cover { width: 160px; height: auto; display: block; margin: 0 auto; }
.cmp-book .lead { font-size: 18px; color: var(--ink); }
.cmp-pair { display: grid; grid-template-columns: 1fr; gap: 20px; }
.cmp-side { border-radius: 10px; overflow: hidden; border: 1px solid var(--line); }
.cmp-side pre[class*="language-"] { margin: 0; border-radius: 0; font-size: 13px; overflow-x: auto; }
.cmp-before, .cmp-before pre[class*="language-"] { background: #fbe9e9 !important; }
.cmp-after, .cmp-after pre[class*="language-"] { background: #e7f6e7 !important; }
.cmp-text { padding: 12px 16px; font-size: 15px; line-height: 1.6; color: #444; }
.cmp-groups { display: grid; grid-template-columns: 1fr; gap: 16px; margin-top: 16px; }
.cmp-groups .jbc-card h2 { font-size: 18px; text-align: left; margin: 0 0 8px; text-transform: none; }
.cmp-groups ul { padding-left: 18px; }
.line-highlight { background: rgba(255, 220, 0, .25) !important; }
.line-highlight::before, .line-highlight::after { content: none !important; }
@media (min-width: 768px) {
  .cmp-book { grid-template-columns: 180px 1fr; }
  .cmp-pair { grid-template-columns: 1fr 1fr; }
  .cmp-groups { grid-template-columns: repeat(2, 1fr); }
  .cmp-title { font-size: 34px; }
}

/* Kata and game keep their own layout but use the site's typography */
.kata-page p, .kata-page li { line-height: 1.55; }
.game-page, .game-page p, .game-page li, .game-page blockquote { font-family: 'Lato', sans-serif !important; color: #555; }
.game-page h1, .game-page h2, .game-page h3, .game-page h4 { font-family: 'Dosis', sans-serif !important; color: var(--ink); }
.game-page { max-width: 760px; margin: 0 auto; font-size: 16px; line-height: 1.7; }
.game-page img { max-width: 100%; height: auto; }
body { display: flex; flex-direction: column; min-height: 100vh; }
main { flex: 1 0 auto; }