/* Beamer Theme CSS - Crane Color Scheme */
/* Crane uses amber accents on white background */

:root {
  /* Crane color palette (for text pages) */
  --crane-amber: #f9a825;
  --crane-amber-light: #ffd95a;
  --crane-amber-dark: #c17900;
  --crane-blue: #1565c0;

  /* Solarized Light color palette (for graphs) */
  --sol-base03: #002b36;
  --sol-base02: #073642;
  --sol-base01: #586e75;
  --sol-base00: #657b83;
  --sol-base0: #839496;
  --sol-base1: #93a1a1;
  --sol-base2: #eee8d5;
  --sol-base3: #fdf6e3;

  /* Solarized accent colors (for graphs) */
  --sol-yellow: #b58900;
  --sol-orange: #cb4b16;
  --sol-red: #dc322f;
  --sol-magenta: #d33682;
  --sol-violet: #6c71c4;
  --sol-blue: #268bd2;
  --sol-cyan: #2aa198;
  --sol-green: #859900;

  /* Frame colors - Crane (white background, amber accents) */
  --frame-bg: #ffffff;
  --frame-title-bg: var(--crane-amber);
  --frame-title-text: #000000;
  --frame-subtitle-text: #333333;
  --frame-border: #e0e0e0;

  /* Text colors - Crane */
  --text-primary: #000000;
  --text-secondary: #333333;
  --text-muted: #666666;
  --link-color: var(--crane-blue);

  /* Spacing */
  --frame-padding: 2rem;
  --frame-max-width: 960px;

  /* Typography */
  --font-sans: 'Computer Modern Sans', 'Helvetica Neue', Arial, sans-serif;
  --font-serif: 'Computer Modern Serif', Georgia, serif;
  --font-mono: 'Computer Modern Typewriter', 'Courier New', monospace;
}

/* Reset and base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: clamp(18px, 1.67vw, 32px);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: #ffffff;
  line-height: 1.6;
}

/* Beamer Frame */
.frame {
  background: var(--frame-bg);
  max-width: var(--frame-max-width);
  margin: 2rem auto;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  overflow: hidden;
}

.frame-title-bar {
  background: var(--frame-title-bg);
  padding: 0.75rem var(--frame-padding);
  border-radius: 4px 4px 0 0;
}

.frame-title {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--frame-title-text);
}

.frame-subtitle {
  margin: 0 0 0 0;
  font-size: 1.15rem;
  color: var(--frame-subtitle-text);
  font-weight: 600;
}

.frame-content {
  padding: calc(var(--frame-padding) / 2);
  min-height: 400px;
  background: #ffffff;
}

.frame-footer {
  background: #ffffff;
  border-top: 1px solid var(--frame-border);
  padding: 0.5rem var(--frame-padding);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

/* Full-bleed mode - breaks out of frame */
.full-bleed {
  max-width: 100%;
  margin: 0;
  border-radius: 0;
  box-shadow: none;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.full-bleed .frame-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

/* Title slide - Crane (white background with amber title/subtitle box) */
.title-slide {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  background: #ffffff;
}

.title-slide .title-box {
  background: var(--crane-amber);
  padding: 1.5rem 3rem 1.25rem 3rem;
  border-radius: 8px;
  margin-bottom: 2rem;
}

.title-slide h1 {
  font-size: 2.5rem;
  margin: 0 0 0.5rem 0;
  color: var(--text-primary);
}

.title-slide h2 {
  font-size: 1.25rem;
  margin: 0;
  padding: 0 1rem;
  color: var(--text-primary);
  font-weight: normal;
}

.title-slide .author {
  font-size: 1.1rem;
  color: var(--text-primary);
  margin: 1rem 0 0.25rem 0;
}

.title-slide .institute {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0.25rem 0 0.125rem 0;
}

.title-slide .date {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin: 0.25rem 0;
}

/* Section headers - Crane (white background with amber title) */
.section-header {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
  background: #ffffff;
}

.section-header .section-title-box {
  background: var(--crane-amber);
  padding: 1.5rem 3rem;
  border-radius: 8px;
}

.section-header h1 {
  font-size: 2.5rem;
  margin: 0;
  color: var(--text-primary);
}

.section-header h2 {
  font-size: 1.25rem;
  margin: 1rem 0 0 0;
  color: var(--text-secondary);
  font-weight: normal;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  line-height: 1.3;
}

p {
  margin: 0 0 1rem 0;
}

/* Lists - Beamer style */
ul, ol {
  margin: 0 0 1rem 0;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.9rem;
}

/* Itemize bullets - triangles like Beamer */
ul {
  list-style: none;
}

ul > li::before {
  content: "▸";
  color: var(--crane-amber-dark);
  font-weight: bold;
  display: inline-block;
  width: 1em;
  margin-left: -1em;
}

ul ul > li::before {
  content: "▹";
}

/* Enumerate - Beamer circles (drawn with drop shadow) */
ol {
  list-style: none;
  counter-reset: beamer-enum;
}

ol > li {
  counter-increment: beamer-enum;
}

ol > li::before {
  content: counter(beamer-enum);
  background: var(--crane-amber);
  color: #000000;
  font-weight: bold;
  font-size: 0.75em;
  width: 1.5em;
  height: 1.5em;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: -2em;
  margin-right: 0.5em;
  border: 1.5px solid #000000;
  box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

/* Block environments - Crane theme (amber title, light yellow body, black text, no borders) */
.block-group {
  display: grid;
  grid-template-columns: 1fr auto 3fr;
  row-gap: 1rem;
}
.block-group > .block {
  grid-column: 2;
}
.block {
  border-radius: 8px;
  overflow: hidden;
  width: fit-content;
  max-width: 100%;
}

.block-title {
  background: var(--crane-amber);
  padding: 0.6rem 1rem;
  font-weight: bold;
  color: #000000;
}

.block-body {
  background: #fff8e1;  /* Light yellow */
  padding: 1rem;
  color: #000000;
}

/* Definition, Example, Alert blocks - all use same Crane styling */

/* Emphasis */
.structure {
  color: var(--crane-blue);
  font-weight: bold;
}

.alert-text {
  color: #c62828;
  font-weight: bold;
}

/* Two-column layout */
.columns {
  display: flex;
  gap: 2rem;
}

.column {
  flex: 1;
}

.column-narrow {
  flex: 0.4;
}

.column-wide {
  flex: 0.6;
}

/* Beamer description lists — dt and dd on same line */
dl.beamer-description {
  margin: 0;
}

dl.beamer-description dt {
  float: left;
  clear: left;
  font-weight: bold;
  margin-right: 0.4em;
  margin-top: 0.5rem;
}

dl.beamer-description dt::after {
  content: "";
}

dl.beamer-description dd {
  margin-left: 0;
  margin-top: 0.5rem;
  overflow: hidden; /* keeps dd beside float */
}

dl.beamer-description dd + dt:first-of-type,
dl.beamer-description dt:first-of-type {
  margin-top: 0;
}

dl.beamer-description dt:first-of-type + dd {
  margin-top: 0;
}

/* LaTeX font size helpers */
.fs-14pt { font-size: 1.27em; line-height: 1.3; }
.fs-11pt { font-size: 1em; line-height: 1.5; }
.fs-10pt { font-size: 0.91em; line-height: 1.4; }

/* LaTeX vertical spacing helpers — \vspace after title bar */
.vspace-neg-9mm > .frame-content { padding-top: 0; }
.vspace-neg-5mm > .frame-content { padding-top: 0.4rem; }
.vspace-neg-4mm > .frame-content { padding-top: 0.55rem; }
.vspace-neg-3mm > .frame-content { padding-top: 0.7rem; }

/* Reveal animations - hidden by default */
.reveal {
  opacity: 0;
  transform: translateY(20px);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

/* Horizontal scroll container */
.scroll-section {
  width: 100%;
  overflow: hidden;
  background: #ffffff;
}

.scroll-track {
  display: flex;
  width: fit-content;
}

.scroll-panel {
  width: 100vw;
  min-height: 100vh;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: #ffffff;
}

/* Graph container */
.graph-container {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

.graph-container svg {
  width: 100%;
  height: auto;
}

/* Graph frame — full viewport, no beamer styling */
.scroll-frame {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.scroll-frame.graph-frame {
  padding: 0;
  background: #fdf6e3;
}

.scroll-frame-inner {
  position: relative;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  padding-left: 2vw;
}

/* ============================================
   OVERLAY SYSTEM
   For frames with Beamer overlays (\pause, \uncover, <1->)
   ============================================ */

.overlay-frame {
  position: relative;
}

.overlay-frame .frame-title-bar {
  position: sticky;
  top: 0;
  z-index: 10;
}

.overlay-frame .overlay {
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.overlay-frame .overlay.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Print styles */
@media print {
  body {
    background: white;
  }

  .frame {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
    margin: 1rem auto;
  }

  .full-bleed {
    min-height: auto;
    page-break-before: always;
  }

  .scroll-section {
    overflow: visible;
  }

  .scroll-track {
    flex-direction: column;
    width: 100%;
  }

  .scroll-panel {
    width: 100%;
    min-height: auto;
    page-break-inside: avoid;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .overlay-frame .overlay {
    opacity: 1;
    transform: none;
  }
}

/* Mobile responsiveness */
@media (max-width: 768px) {
  .frame {
    margin: 1rem;
    border-radius: 0;
  }

  .frame-content {
    padding: 1rem;
  }

  .columns {
    flex-direction: column;
    gap: 1rem;
  }

  .title-slide h1,
  .section-header h1 {
    font-size: 2rem;
  }

  .title-slide .title-box,
  .section-header .section-title-box {
    padding: 1rem 1.5rem;
  }
}