/* Slide themes — a visual emulation of classic Beamer looks (Warsaw/Madrid/Berlin/etc.),
   not a beamer.cls execution. Shared between the editor preview and the presenter/projector window. */

.slide {
  --accent: #b45309;
  aspect-ratio: 16 / 9;
  width: 100%;
  max-width: 960px;
  max-height: 100%;
  background: #fff;
  color: #1c1a17;
  box-shadow: 0 4px 24px rgba(0,0,0,.18);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans, sans-serif);
}

.slide .slide-body {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 2.4rem 3rem;
  font-size: 1.05rem;
  line-height: 1.5;
}
.slide .slide-body .article { max-width: none; padding: 0; }
.slide .slide-error { font-size: .75rem; color: #dc2626; margin-bottom: .5rem; }

.slide .slide-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  padding: 1.1rem 3rem 0.6rem;
  flex-shrink: 0;
}

.slide .titleslide {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}
.slide .titleslide h1 { font-size: 2.1rem; font-weight: 700; margin: 0 0 .75rem; font-family: var(--font-serif, serif); }
.slide .titleslide-author { font-size: 1.05rem; opacity: .75; margin: 0 0 .35rem; }
.slide .titleslide-date { font-size: .85rem; opacity: .5; margin: 0; }

.slide-footer {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding: .4rem 1rem;
  font-size: .7rem;
  opacity: .55;
}

/* ---- Warsaw: navy header bar, gold rule, serif titling ---- */
.slide.theme-warsaw .slide-title {
  background: color-mix(in srgb, var(--accent) 14%, #16233f);
  color: #fff;
  border-bottom: 3px solid var(--accent);
  font-family: var(--font-serif, serif);
  padding: 1.1rem 3rem;
}
.slide.theme-warsaw .titleslide h1 { color: color-mix(in srgb, var(--accent) 20%, #16233f); }
.slide.theme-warsaw .slide-footer { background: #16233f; color: #fff; }

/* ---- Madrid: light, centered accent title, bottom progress rule ---- */
.slide.theme-madrid .slide-title {
  color: var(--accent);
  text-align: center;
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.slide.theme-madrid .titleslide h1 { color: var(--accent); }
.slide.theme-madrid .slide-footer { border-top: 2px solid var(--accent); }

/* ---- Berlin: bold sans, left accent rule ---- */
.slide.theme-berlin .slide-title {
  font-weight: 800;
  border-left: 6px solid var(--accent);
  padding-left: 1.6rem;
}
.slide.theme-berlin .titleslide h1 { font-weight: 800; }
.slide.theme-berlin .slide-footer { color: var(--accent); font-weight: 600; }

/* ---- Simple: no chrome, just content ---- */
.slide.theme-simple .slide-title { font-weight: 600; color: var(--accent); }
.slide.theme-simple .slide-footer { opacity: .35; }

/* ---- Dark: dark background ---- */
.slide.theme-dark { background: #14120f; color: #ece8e2; }
.slide.theme-dark .slide-title { color: var(--accent); border-bottom: 2px solid var(--accent); padding: 1.1rem 3rem; }
.slide.theme-dark .titleslide h1 { color: var(--accent); font-family: var(--font-serif, serif); }
.slide.theme-dark .slide-footer { color: color-mix(in srgb, var(--accent) 60%, #ece8e2); }
.slide.theme-dark .slide-body :is(a, strong, b) { color: #fff; }