/* ==========================================================================
   parkscomputing.com site theme and site-specific styles, loaded after
   pudl.css (and pudl-windows.css where the page uses windows). This file
   replaces the Bootstrap-era site.css. It sets the palette tokens PUDL
   invites a theme to set, and it styles the things PUDL has no component
   for: article prose, the nav menus, the image lightbox, the comment
   thread, and the desktop shell.
   ========================================================================== */

/* === Theme ================================================================
   The accent carries the site's long-standing link blue. Everything else
   stays PUDL's neutral graphite. */
:root {
  --accent: #0d47a1;
  --accent-hover: #08306e;
}

[data-theme="dark"] {
  --accent: #4da3ff;
  --accent-hover: #7bd3ff;
  --on-accent: #0d1117;
}

/* === Page shell =========================================================== */
.site-main {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header { position: sticky; top: 0; z-index: 90; }
body.desktop .site-header { position: static; flex: none; }
.brand img { display: block; width: 24px; height: 24px; }

/* === Primary nav: a section-tab strip below the topbar ==================== */
.site-nav {
  display: flex; flex-wrap: wrap; align-items: stretch;
  padding: 0 16px;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
}

/* A section with children is a native details element; its summary looks
   like every other tab and its menu is a raised card. No script. */
.nav-drop { position: relative; }
.nav-drop > summary {
  list-style: none;
  cursor: pointer;
  display: inline-block;
}
.nav-drop > summary::-webkit-details-marker { display: none; }
.nav-drop > summary::after {
  content: " \25BE";
  font-size: 10px;
  color: var(--text-muted);
}
.nav-menu {
  position: absolute; top: 100%; left: 0; z-index: 95;
  min-width: 220px;
  margin: 0; padding: 6px;
  display: flex; flex-direction: column;
  background: var(--dialog-bg, var(--surface));
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card), 0 12px 32px rgb(0 0 0 / 0.22);
}
.nav-drop.nav-drop-end .nav-menu { left: auto; right: 0; }
.nav-menu a {
  padding: 7px 12px;
  border-radius: 5px;
  font-size: 13.5px; font-weight: 600;
  color: var(--text); text-decoration: none;
  white-space: nowrap;
}
.nav-menu a:hover { background: var(--surface-alt); color: var(--text); }

/* === Footer =============================================================== */
.site-footer {
  margin-top: 48px;
  padding: 18px 20px;
  background: var(--tb-grad);
  border-top: 1px solid var(--tb-border);
  color: var(--tb-fg);
  font-size: 13px;
}
.site-footer a { color: var(--tb-fg); }

/* === Article prose ======================================================== */
.post-content {
  max-width: 860px;
  margin: 0 auto 3rem;
  padding-top: 1rem;
}
.post-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 2.6vw, 2.5rem);
  font-weight: 700; line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 .6rem;
}
.post-meta { font-size: .85rem; color: var(--text-muted); }
.post-body { font-size: 1.04rem; line-height: 1.65; }
.post-body p { margin-bottom: 1.1rem; }
.post-body h1, .post-body h2, .post-body h3, .post-body h4 {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
  scroll-margin-top: 6.5rem;
}
.post-body h2 { margin-top: 2.4rem; font-size: 1.6rem; }
.post-body h3 { margin-top: 1.9rem; font-size: 1.3rem; }
.post-body h4 { margin-top: 1.6rem; font-size: 1.1rem; }
.post-body pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0;
  font-size: .85rem;
  overflow: auto;
  box-shadow: var(--entry-shadow);
}
.post-body pre code { display: block; padding: 12px 14px; font-family: var(--mono); }
.post-body code:not(pre code) {
  font-family: var(--mono);
  background: var(--surface-alt);
  padding: .1rem .35rem;
  border-radius: 4px;
  font-size: .85em;
}
.post-body blockquote {
  margin: 1.4rem 0;
  padding: .75rem 1rem .75rem 1.1rem;
  background: var(--surface);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.post-body img, .post-body figure { max-width: 100%; height: auto; }
.post-body figure { margin: 1.5rem 0; }
.post-body figcaption {
  text-align: center; margin-top: .4rem;
  font-size: smaller; font-style: italic;
  color: var(--text-muted);
}
.post-body table:not(.kv-table) {
  border-collapse: collapse; font-size: .95rem;
}
.post-body table:not(.kv-table) th,
.post-body table:not(.kv-table) td {
  border: 1px solid var(--border); padding: 6px 10px;
}
.posted-on { font-style: italic; font-size: smaller; color: var(--text-muted); }

/* Article images invite the lightbox. */
.content-body img:not([data-no-lightbox]), .win-body img:not([data-no-lightbox]) { cursor: pointer; }

/* === Post listing ========================================================= */
.post-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  margin: 1rem 0 2rem;
  padding: 0;
}
.post-card {
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 1rem;
  box-shadow: var(--shadow-card);
}
.post-card-title {
  font-size: 1.1rem; font-weight: 600; line-height: 1.3;
}
.post-card-meta { font-size: .75rem; color: var(--text-muted); margin: .35rem 0; }
.post-card-excerpt { font-size: .9rem; line-height: 1.4; flex-grow: 1; margin-bottom: .75rem; }
.post-card-more { font-size: .78rem; font-weight: 600; }

/* === Audio / video accordions (native details) ============================ */
.media-accordion {
  margin: .75rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
}
.media-accordion > summary {
  padding: 8px 12px;
  font-size: .9rem; font-weight: 600;
  color: var(--accent);
  cursor: pointer;
}
.media-accordion > .media-accordion-body { padding: 4px 12px 12px; }

/* === Comments ============================================================= */
.page-comments h2 {
  font-family: var(--font-display);
  border-top: 1px solid var(--border);
  padding-top: 1.5rem; margin-top: 2.5rem;
}
.page-comment {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 14px 18px;
  margin: 0 0 14px;
}
.page-comment-title { margin: 0 0 4px; font-size: 1.05rem; }
.page-comment-author { font-size: .8rem; color: var(--text-muted); margin-bottom: .5rem; }
.page-post-comment { max-width: 560px; margin-top: 2rem; }

/* === Image lightbox =======================================================
   A native dialog, styled with PUDL's dialog vocabulary. The shell is
   server-rendered in the layout; lightbox.js swaps the image in and out.
   The image itself is flat content; the controls are raised. */
.lightbox {
  padding: 0; margin: auto;
  max-width: min(94vw, 1400px); max-height: 94vh;
  background: transparent; border: 0;
  overflow: visible;
}
.lightbox::backdrop { background: rgb(0 0 0 / 0.62); }
.lightbox-frame {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  position: relative;
}
.lightbox-img {
  max-width: min(94vw, 1400px); max-height: 84vh;
  border-radius: var(--radius-sm);
  box-shadow: 0 24px 64px rgb(0 0 0 / 0.5);
}
.lightbox-caption {
  color: #fff; font-size: .9rem; text-align: center;
  text-shadow: 0 1px 3px rgb(0 0 0 / 0.8);
  max-width: 80ch;
}
.lightbox-counter {
  color: #fff; font-size: .8rem; opacity: .85;
  text-shadow: 0 1px 3px rgb(0 0 0 / 0.8);
}
.lightbox-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; padding: 0;
  border-radius: 50%;
  border: 1px solid var(--raise-border);
  background: var(--raise-grad);
  box-shadow: var(--raise-shadow);
  color: var(--text);
  font: 600 16px/1 var(--font);
  cursor: pointer;
}
.lightbox-btn:hover { background: var(--raise-grad-hover); border-color: var(--raise-border-hover); }
.lightbox-btn:focus-visible { outline: none; box-shadow: var(--raise-shadow), 0 0 0 3px var(--focus-ring); }
.lightbox-close { position: absolute; top: -14px; right: -14px; }
.lightbox-prev, .lightbox-next {
  position: absolute; top: 50%; transform: translateY(-50%);
}
.lightbox-prev { left: -14px; }
.lightbox-next { right: -14px; }
.lightbox-prev[hidden], .lightbox-next[hidden] { display: none; }

/* === Desktop mode =========================================================
   The desktop is PUDL's master-detail layout with the windows as the
   detail pane, after PUDL's samples/article-reader.html. pudl.css sizes
   the layout itself (body:has(> .md-layout) fills the viewport); what
   follows is only this site's stage styling. */
body.desktop .md-toolbar .md-section-label { padding: 0; }
body.desktop .md-sidebar { width: 300px; }
body.desktop .app-section-bar { flex: none; }
.desktop-filter-form { display: inline-flex; }
.reader-stage { padding: 0; overflow: hidden; }
.reader-col { display: flex; flex-direction: column; height: 100%; }
.reader-col .md-back { margin: 12px 16px 4px; align-self: flex-start; }
.reader-col .win-host { flex: 1; min-height: 0; position: relative; }
.reader-empty {
  height: 100%; overflow-y: auto; padding: 32px;
}
.reader-empty .card { max-width: 560px; margin: 10vh auto 0; }

/* Windowed article prose keeps the page's reading measure. */
.win-body .post-content { margin-bottom: 1.5rem; padding-top: 0; }

/* An image opened as a child window. The body is a column: the figure
   takes the room and the prev/next nav sits beneath it. */
.win-body:has(> .win-image) {
  display: flex; flex-direction: column;
}
.win-image {
  margin: 0; flex: 1; min-height: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
}
.win-image img { max-width: 100%; max-height: 100%; min-height: 0; object-fit: contain; }
.win-image figcaption { font-size: .9rem; font-style: italic; color: var(--text-muted); flex: none; }
.win-img-nav {
  flex: none;
  display: flex; align-items: center; justify-content: center; gap: 12px;
  padding-top: 10px;
}
.win-img-nav .icon-btn { text-decoration: none; }
.win-img-nav .is-disabled { opacity: .35; }
.win-img-nav .num { font-size: .8rem; color: var(--text-muted); }

/* An image wrapped as a child-window opener is content, not a link block. */
.win-img-link { display: inline-block; line-height: 0; }

/* A window hosting an app page in a frame gives it the whole body. */
.win-app-frame { display: block; width: 100%; height: 100%; border: 0; }
.win-body:has(> .win-app-frame) { padding: 0; overflow: hidden; }

/* A page rendered bare for a frame keeps a modest gutter. */
.site-main-framed { padding: 0 16px; }

/* The active window title bar's quiet dark treatment became PUDL's own
   default in 0.9.0 (with --win-active-* tokens for tuning), so the
   override that prototyped it here is gone. */

/* The launcher glyph, after PUDL's article-reader sample. */
.launcher-icon { width: 14px; height: 14px; flex: none; }