:root {
  --bg: #0a0e14;
  --term-bg: #0d1117;
  --term-border: #1f2630;
  --accent: #39ff8f;
  --accent-dim: #1f8a52;
  --accent-glow: rgba(57, 255, 143, 0.35);
  --text: #c9d1d9;
  --text-dim: #6e7681;
  --heading: #e6edf3;
  --link: #58a6ff;
  --code-bg: #161b22;
  --table-border: #30363d;
  --quote-bar: #39ff8f;
  --scanline-opacity: 0.035;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  background: radial-gradient(ellipse at center, #11161f 0%, var(--bg) 70%);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Monaco, monospace;
  color: var(--text);
  overflow: hidden;
}

/* Subtle CRT scanline + vignette overlay for terminal glow feel */
.crt-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  background:
    repeating-linear-gradient(
      to bottom,
      rgba(0, 0, 0, var(--scanline-opacity)) 0px,
      rgba(0, 0, 0, var(--scanline-opacity)) 1px,
      transparent 2px,
      transparent 3px
    );
  mix-blend-mode: overlay;
}

.terminal {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  margin: 0;
  display: flex;
  flex-direction: column;
  background: var(--term-bg);
  border: none;
  border-radius: 0;
  box-shadow:
    inset 0 0 0 1px rgba(57, 255, 143, 0.08),
    0 0 60px 10px rgba(57, 255, 143, 0.06);
  overflow: hidden;
  animation: flicker-in 0.6s ease-out;
}

@keyframes flicker-in {
  0% { opacity: 0; filter: brightness(1.8); }
  60% { opacity: 1; }
  100% { opacity: 1; filter: brightness(1); }
}

.titlebar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: linear-gradient(to bottom, #151b23, #0f141b);
  border-bottom: 1px solid var(--term-border);
  user-select: none;
}

.title {
  flex: 1;
  text-align: left;
  font-size: 12.5px;
  color: var(--text-dim);
  letter-spacing: 0.3px;
}
.title::before {
  content: "❯";
  color: var(--accent);
  margin-right: 8px;
  text-shadow: 0 0 6px var(--accent-glow);
}

.slide-counter {
  font-size: 12px;
  color: var(--accent);
  text-shadow: 0 0 8px var(--accent-glow);
  min-width: 48px;
  text-align: right;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}
.zoom-btn {
  width: 24px;
  height: 24px;
  padding: 0;
  line-height: 1;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.zoom-level {
  font-size: 11px;
  color: var(--text-dim);
  min-width: 36px;
  text-align: center;
  cursor: pointer;
  user-select: none;
}
.zoom-level:hover { color: var(--accent); }

.viewport {
  flex: 1;
  overflow-y: auto;
  padding: 48px 64px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-dim) transparent;
}
.viewport::-webkit-scrollbar { width: 8px; }
.viewport::-webkit-scrollbar-thumb { background: var(--accent-dim); border-radius: 4px; }

.slide {
  /* ch scales with font-size, so the reading column grows with zoom
     instead of staying pinned to a fixed pixel width. */
  max-width: min(72ch, 92%);
  margin: 0 auto;
  font-size: 16px;
  animation: slide-in 0.28s ease-out;
  outline: none;
}

@keyframes slide-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: #0f141b;
  border-top: 1px solid var(--term-border);
  font-size: 12px;
  color: var(--text-dim);
}

.status-left .sep { margin: 0 8px; opacity: 0.5; }
#status-mode {
  color: var(--bg);
  background: var(--accent);
  padding: 1px 8px;
  border-radius: 3px;
  font-weight: bold;
  text-shadow: none;
}

.status-right { display: flex; gap: 8px; }

.term-btn {
  font-family: inherit;
  font-size: 12px;
  background: #161b22;
  color: var(--text);
  border: 1px solid var(--table-border);
  border-radius: 5px;
  padding: 6px 14px;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
  display: inline-block;
}
.term-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}
.term-btn:active { transform: translateY(1px); }
.term-btn.primary {
  border-color: var(--accent-dim);
  color: var(--accent);
}
.term-btn:disabled {
  opacity: 0.35;
  cursor: default;
  box-shadow: none;
}
.term-btn:disabled:hover { border-color: var(--table-border); color: var(--text); }

/* ---------- GitHub-like markdown rendering, terminal-tinted ---------- */

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
  color: var(--heading);
  border-bottom: 1px solid var(--term-border);
  padding-bottom: 0.3em;
  margin-top: 0.6em;
}
.markdown-body h1 { font-size: 1.9em; text-shadow: 0 0 14px var(--accent-glow); }
.markdown-body h2 { font-size: 1.5em; }
.markdown-body h3 { font-size: 1.2em; border-bottom: none; }

.markdown-body p { line-height: 1.65; }

.markdown-body a {
  color: var(--link);
  text-decoration: none;
}
.markdown-body a:hover { text-decoration: underline; text-shadow: 0 0 6px rgba(88,166,255,0.5); }

.markdown-body strong { color: var(--heading); }
.markdown-body em { color: var(--accent); font-style: italic; }

.markdown-body code {
  background: var(--code-bg);
  color: var(--accent);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}

.markdown-body pre {
  background: var(--code-bg);
  border: 1px solid var(--table-border);
  border-radius: 6px;
  padding: 14px 16px;
  overflow-x: auto;
  box-shadow: inset 0 0 20px rgba(57, 255, 143, 0.04);
}
.markdown-body pre code {
  background: none;
  color: var(--text);
  padding: 0;
  font-size: 0.88em;
}

.markdown-body blockquote {
  border-left: 3px solid var(--quote-bar);
  margin: 1em 0;
  padding: 0.2em 1em;
  color: var(--text-dim);
  background: rgba(57, 255, 143, 0.04);
}

/* Small pill badge, e.g. to mark a slide as "DEMO" / informational tag */
.badge {
  display: inline-block;
  font-family: var(--mono, inherit);
  font-size: 0.72em;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3em 0.8em;
  border: 1px solid var(--accent-dim);
  border-radius: 999px;
  color: var(--accent);
  background: rgba(57, 255, 143, 0.08);
  box-shadow: 0 0 10px var(--accent-glow);
  margin-bottom: 0.9em;
}

/* Callout for important "edit/replace this" instructions */
.markdown-body .callout {
  border: 1px solid var(--accent-dim);
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  padding: 0.7em 1.1em;
  margin: 1em 0;
  background: rgba(57, 255, 143, 0.06);
}
.markdown-body .callout p { margin: 0.3em 0; }

.markdown-body ul, .markdown-body ol {
  padding-left: 1.4em;
  line-height: 1.6;
}

.markdown-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 1em 0;
  font-size: 0.92em;
}
.markdown-body th, .markdown-body td {
  border: 1px solid var(--table-border);
  padding: 6px 12px;
}
.markdown-body th {
  background: var(--code-bg);
  color: var(--heading);
}
.markdown-body tr:nth-child(even) { background: rgba(255,255,255,0.02); }

.markdown-body hr {
  border: none;
  border-top: 1px solid var(--term-border);
  margin: 1.5em 0;
}

.markdown-body img { max-width: 100%; border-radius: 6px; }

::selection { background: var(--accent-dim); color: #04110a; }