/*
 * slides@1 base styles. Theme-agnostic: every color, font and size comes from a
 * CSS custom property with a fallback, so a site's theme.css only has to set
 * the tokens it wants to change:
 *
 *   --bg --fg --muted --accent --surface --line
 *   --font-display --font-body --font-mono
 *   --slide-pad --slide-title-size --letterbox
 */

html,
body {
  margin: 0;
  padding: 0;
  background: var(--letterbox, #000);
}

#root {
  min-height: 100vh;
}

.intern-deck {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background: var(--letterbox, #000);
  color: var(--fg, #f5f6f8);
  font-family: var(
    --font-body,
    system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif
  );
}

.intern-deck[data-view="print"] {
  position: static;
  overflow: visible;
}

.intern-viewport {
  position: absolute;
  inset: 0;
  user-select: none;
}

.intern-stage {
  position: absolute;
  left: 50%;
  top: 50%;
  transform-origin: center center;
  overflow: hidden;
  background: var(--bg, #0b0d12);
}

.intern-layer {
  position: absolute;
  inset: 0;
}

.intern-slide {
  position: absolute;
  inset: 0;
  box-sizing: border-box;
  padding: var(--slide-pad, 96px);
  display: flex;
  flex-direction: column;
  gap: 28px;
  overflow: hidden;
  background: var(--bg, #0b0d12);
  color: var(--fg, #f5f6f8);
  font-family: var(
    --font-body,
    system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif
  );
  font-size: 36px;
  line-height: 1.35;
}

.intern-title {
  margin: 0;
  font-family: var(--font-display, var(--font-body, system-ui, sans-serif));
  font-size: var(--slide-title-size, 76px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--fg, #f5f6f8);
}

.intern-subtitle {
  margin: 0;
  font-size: 40px;
  line-height: 1.3;
  color: var(--muted, #9aa3b2);
}

.intern-columns {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 48px;
  align-items: start;
  min-height: 0;
}

.intern-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 28px;
}

.intern-interactive {
  position: relative;
}

.intern-slide code,
.intern-slide pre {
  font-family: var(--font-mono, ui-monospace, "SF Mono", Menlo, monospace);
}

.intern-slide a {
  color: var(--accent, #6ea8ff);
}

.intern-slide hr {
  border: 0;
  border-top: 2px solid var(--line, #232a36);
  width: 100%;
}

/* Progress bar along the bottom of the viewport. */
.intern-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: var(--line, #232a36);
  pointer-events: none;
}

.intern-progress > div {
  height: 100%;
  background: var(--accent, #6ea8ff);
  transform-origin: left center;
}

/* Overview grid (key o). */
.intern-overview {
  position: absolute;
  inset: 0;
  overflow: auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
  padding: 32px;
  background: var(--letterbox, #000);
  align-content: start;
  justify-items: center;
}

.intern-overview-item {
  all: unset;
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  color: var(--muted, #9aa3b2);
  font: 14px var(--font-body, system-ui, sans-serif);
}

.intern-overview-item[data-current],
.intern-overview-item:hover,
.intern-overview-item:focus-visible {
  color: var(--fg, #f5f6f8);
}

.intern-overview-item[data-current] .intern-thumb,
.intern-overview-item:hover .intern-thumb,
.intern-overview-item:focus-visible .intern-thumb {
  outline: 3px solid var(--accent, #6ea8ff);
}

.intern-thumb {
  position: relative;
  overflow: hidden;
  background: var(--bg, #0b0d12);
  border: 1px solid var(--line, #232a36);
}

.intern-thumb-stage {
  position: absolute;
  left: 0;
  top: 0;
  transform-origin: top left;
  overflow: hidden;
}

/* Presenter view (key p). */
.intern-presenter {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px 24px;
  overflow: auto;
  background: var(--surface, #12151c);
  color: var(--fg, #f5f6f8);
  font: 16px var(--font-body, system-ui, sans-serif);
}

.intern-presenter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted, #9aa3b2);
}

.intern-presenter-bar [data-presenter-timer] {
  margin-left: auto;
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 28px;
  color: var(--fg, #f5f6f8);
}

.intern-presenter-bar button {
  font: inherit;
  color: var(--fg, #f5f6f8);
  background: transparent;
  border: 1px solid var(--line, #232a36);
  border-radius: 6px;
  padding: 6px 12px;
  cursor: pointer;
}

.intern-presenter-body {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas: "current next" "notes notes";
  gap: 24px;
  align-items: start;
}

.intern-presenter-current {
  grid-area: current;
}

.intern-presenter-next {
  grid-area: next;
  color: var(--muted, #9aa3b2);
}

.intern-presenter-notes {
  grid-area: notes;
  font-size: 22px;
  line-height: 1.5;
  white-space: pre-wrap;
}

/* Print (?print, ?print=steps): one stage-sized page per slide. */
.intern-page {
  position: relative;
  overflow: hidden;
  break-after: page;
  page-break-after: always;
}

.intern-page:last-child {
  break-after: auto;
  page-break-after: auto;
}

@media print {
  html,
  body {
    background: var(--bg, #fff);
  }
  .intern-deck {
    position: static;
    overflow: visible;
  }
  .intern-page {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}

/* Deterministic stills: no CSS motion while capturing or printing. */
.intern-deck[data-mode="capture"] *,
.intern-deck[data-mode^="print"] * {
  animation: none !important;
  transition: none !important;
}

@media (prefers-reduced-motion: reduce) {
  .intern-deck * {
    animation: none !important;
    transition: none !important;
  }
}