/*
 * CIS352 reveal.js theme: Syracuse Orange (#F76900) + Navy (#000E54)
 * Light variant: white slide background, solarized-light code blocks.
 * Designed for the Rust whirlwind tour (first-day + day-two deck).
 */

:root {
  --su-orange: #f76900;
  --su-orange-soft: #ff8a2e;
  --su-orange-deep: #c25200;
  --su-navy: #000e54;
  --su-navy-soft: #1a277a;
  --su-navy-deep: #000729;
  --su-ink: #1a1a1a;
  --su-text: #26304a;
  --su-muted: #6b7a99;
  --su-accent: #b58900;       /* solarized yellow — harmonizes with code blocks */
  --su-rust-red: #b7410e;
  --su-page: #ffffff;
  --su-page-soft: #fbf9f4;    /* very subtle cream, matches solarized bg tone */
  --su-rule: #e6e0d1;
  --su-code-bg: #fdf6e3;      /* solarized base3 */
  --su-good: #6aa84f;
}

.reveal-viewport {
  background: var(--su-page);
  background-attachment: fixed;
}

.reveal {
  font-family: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 34px;
  font-weight: 400;
  color: var(--su-text);
  letter-spacing: 0.003em;
}

.reveal .slides {
  text-align: left;
}

.reveal .slides > section,
.reveal .slides > section > section {
  padding: 10px 20px;
  line-height: 1.35;
}

/* Subtle accent bar along the top of every slide */
.reveal .slides > section::before,
.reveal .slides > section > section::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--su-orange) 0%, var(--su-accent) 100%);
  opacity: 0.9;
}

/* ---------- Headings ---------- */

.reveal h1,
.reveal h2,
.reveal h3,
.reveal h4,
.reveal h5,
.reveal h6 {
  font-family: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  text-transform: none;
  margin: 0 0 0.35em 0;
  text-shadow: none;
  color: var(--su-navy);
}

.reveal h1 {
  font-size: 2.4em;
  color: var(--su-orange);
}

.reveal h2 {
  font-size: 1.7em;
  color: var(--su-navy);
  border-bottom: 4px solid var(--su-orange);
  padding-bottom: 0.12em;
  margin-bottom: 0.45em;
  display: inline-block;
}

.reveal h3 {
  font-size: 1.25em;
  color: var(--su-orange-deep);
}

.reveal h4 {
  font-size: 1.05em;
  color: var(--su-navy-soft);
}

.reveal p {
  margin: 0.4em 0;
  line-height: 1.45;
  color: var(--su-text);
}

.reveal strong {
  color: var(--su-orange-deep);
  font-weight: 700;
}

.reveal em {
  color: var(--su-navy-soft);
  font-style: italic;
}

.reveal a,
.reveal a:visited {
  color: var(--su-orange-deep);
  text-decoration: none;
  border-bottom: 2px solid rgba(247, 105, 0, 0.4);
  transition: all 0.12s ease-in-out;
}

.reveal a:hover {
  color: var(--su-navy);
  border-bottom-color: var(--su-navy);
  background: rgba(247, 105, 0, 0.08);
}

.reveal ul,
.reveal ol {
  display: block;
  margin-left: 1.1em;
}

.reveal ul li,
.reveal ol li {
  margin: 0.25em 0;
  color: var(--su-text);
}

.reveal ul {
  list-style: none;
}

.reveal ul li::before {
  content: "▸";
  color: var(--su-orange);
  display: inline-block;
  width: 1em;
  margin-left: -1em;
  font-weight: 700;
}

.reveal blockquote {
  display: block;
  position: relative;
  background: var(--su-page-soft);
  border-left: 5px solid var(--su-orange);
  margin: 0.6em 0;
  padding: 0.55em 0.9em;
  width: 95%;
  color: var(--su-text);
  font-style: italic;
  box-shadow: 0 2px 10px rgba(0, 14, 84, 0.06);
  border-radius: 6px;
}

/* ---------- Code ---------- */

.reveal code {
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  background: var(--su-code-bg);
  color: var(--su-orange-deep);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.92em;
  border: 1px solid var(--su-rule);
}

.reveal pre {
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  display: block;
  width: 100%;
  margin: 0.55em auto;
  font-size: 0.56em;
  line-height: 1.45;
  box-shadow: 0 6px 22px rgba(0, 14, 84, 0.1);
  border: 1px solid var(--su-rule);
  border-radius: 8px;
  overflow: hidden;
  position: relative;
}

.reveal pre::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--su-orange) 0%, var(--su-accent) 100%);
  z-index: 2;
}

.reveal pre code {
  display: block;
  padding: 1.1em 1.2em 1em 1.2em;
  max-height: 640px;
  word-wrap: normal;
  background: var(--su-code-bg);
  color: #657b83;   /* solarized base00 */
  border-radius: 0;
  border: none;
}

.reveal pre code.hljs {
  padding: 1.1em 1.2em 1em 1.2em;
  background: var(--su-code-bg);
}

/* ---------- Tables ---------- */

.reveal table {
  margin: 0.6em auto;
  border-collapse: collapse;
  border-spacing: 0;
  background: var(--su-page);
  border: 1px solid var(--su-rule);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 14, 84, 0.05);
}

.reveal table th {
  background: var(--su-orange);
  color: #fff;
  font-weight: 700;
  padding: 0.4em 0.85em;
  text-align: left;
  border: none;
}

.reveal table td {
  padding: 0.35em 0.85em;
  border-top: 1px solid var(--su-rule);
  color: var(--su-text);
}

.reveal table tr:nth-child(even) td {
  background: var(--su-page-soft);
}

/* ---------- Title slide ---------- */

.reveal section.title-slide {
  text-align: center;
}

.reveal section.title-slide h1 {
  font-size: 3em;
  background: linear-gradient(135deg, var(--su-orange) 0%, var(--su-orange-deep) 60%, var(--su-navy) 120%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.2em;
}

.reveal section.title-slide h2 {
  font-size: 1.1em;
  color: var(--su-navy);
  border: none;
  display: block;
  font-weight: 400;
  margin-top: 0.3em;
}

.reveal section.title-slide .course-tag {
  display: inline-block;
  background: var(--su-orange);
  color: #fff;
  padding: 0.28em 0.9em;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.7em;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.8em;
}

/* ---------- Section dividers ---------- */

.reveal section.section-divider {
  text-align: center;
}

.reveal section.section-divider h1 {
  font-size: 3.2em;
  color: var(--su-orange);
  margin-bottom: 0.1em;
}

.reveal section.section-divider h2 {
  color: var(--su-navy);
  border: none;
  font-weight: 400;
  font-size: 1.1em;
  display: block;
}

.reveal section.section-divider .chapter-num {
  display: block;
  font-family: "JetBrains Mono", monospace;
  color: var(--su-orange-deep);
  font-size: 0.9em;
  letter-spacing: 0.2em;
  margin-bottom: 0.5em;
  text-transform: uppercase;
}

/* ---------- Big point slides ---------- */

.reveal section.big-point {
  text-align: center;
}

.reveal section.big-point h1 {
  font-size: 2.6em;
  color: var(--su-orange);
}

.reveal section.big-point p {
  font-size: 1.2em;
  color: var(--su-navy);
}

/* ---------- Two-column helper ---------- */

.reveal .two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2em;
  align-items: start;
}

.reveal .col-left,
.reveal .col-right {
  min-width: 0;
}

/* ---------- Callouts ---------- */

.reveal .callout {
  background: #fff4ec;
  border-left: 5px solid var(--su-rust-red);
  border-radius: 6px;
  padding: 0.55em 0.9em;
  margin: 0.5em 0;
  font-size: 0.85em;
  color: var(--su-ink);
  box-shadow: 0 1px 4px rgba(0, 14, 84, 0.05);
}

.reveal .callout.note {
  background: #eef2fb;
  border-left-color: var(--su-navy);
}

.reveal .callout.good {
  background: #eef8e9;
  border-left-color: var(--su-good);
}

.reveal .callout strong {
  color: var(--su-orange-deep);
}

/* ---------- Playground link (subtle, under code blocks) ---------- */

.reveal .playground {
  display: inline-block;
  font-size: 0.48em;
  background: transparent;
  color: var(--su-orange-deep) !important;
  border: 1px solid rgba(247, 105, 0, 0.35);
  padding: 0.15em 0.6em;
  border-radius: 999px;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: 0.02em;
  margin-top: -0.1em;
  box-shadow: none;
  opacity: 0.75;
  transition: opacity 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.reveal .playground:hover {
  background: rgba(247, 105, 0, 0.08);
  border-color: var(--su-orange);
  color: var(--su-orange-deep) !important;
  opacity: 1;
}

/* ---------- Footer branding ---------- */

.reveal .footer {
  position: absolute;
  bottom: 14px;
  right: 24px;
  font-size: 14px;
  color: var(--su-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  pointer-events: none;
}

/* ---------- Slide number + controls ---------- */

.reveal .slide-number {
  background: var(--su-orange);
  color: #fff;
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: 4px;
}

.reveal .controls {
  color: var(--su-orange);
}

.reveal .progress {
  color: var(--su-orange);
  height: 5px;
  background: rgba(0, 14, 84, 0.08);
}

.reveal .progress span {
  background: linear-gradient(90deg, var(--su-orange) 0%, var(--su-accent) 100%);
}

/* ---------- Print / PDF tweaks ---------- */

@media print {
  .reveal-viewport {
    background: #ffffff !important;
  }
}