/* Base reveal.js styles
 *
 * Copy this file as styles.css for each new presentation.
 * Customize the CSS variables (especially colors) for your theme.
 *
 * IMPORTANT: All font sizes use pt (points) for predictable sizing.
 * Base text is intentionally small (16pt) to fit content-heavy slides.
 * Use .text-lg, .text-xl, etc. classes when slides have less content.
 */

/* ===========================================
   CSS VARIABLES - Customize these for each presentation
   =========================================== */
:root {
  /* ===========================================
     BACKGROUND COLORS
     For dark presentations, change to dark colors (e.g., #1a1a2e, #0d1117)
     Then update --text-color and --muted-color to light colors below.
     =========================================== */
  --background-color: #ffffff;              /* Main slide background */
  --section-divider-bg: #ffffff;            /* Section divider background (set different for contrast) */

  /* Typography - ALWAYS use pt for font sizes */
  --heading-font: "Source Sans Pro", Helvetica, sans-serif;
  --body-font: "Source Sans Pro", Helvetica, sans-serif;
  --base-font-size: 32px;   /* Only px value - sets reveal.js base */
  --text-size: 16pt;        /* Base body text - intentionally small */
  --h1-size: 48pt;
  --h2-size: 36pt;
  --h3-size: 24pt;
  --footnote-size: 11pt;

  /* Colors - CUSTOMIZE THESE */
  --primary-color: #2196F3;    /* Main accent color */
  --secondary-color: #ff9800;  /* Secondary accent */
  --text-color: #222;          /* Main text - use light color (e.g., #f0f0f0) for dark backgrounds */
  --muted-color: #666;         /* Secondary text - use lighter color for dark backgrounds */
  --line-color: #333;          /* Decorative lines */

  /* Layout */
  --slide-padding: 60px;
  --slide-padding-top: 40px;
  --content-gap: 30px;

  /* Boxes & Borders */
  --box-radius: 8px;           /* Set to 0 for sharp corners */
  --box-bg: #f5f5f5;
  --box-border: #ddd;
  --accent-border-width: 6px;

  /* Callout colors */
  --blue: #2196F3;
  --blue-bg: #e3f2fd;
  --blue-border: #90caf9;

  --orange: #ff9800;
  --orange-bg: #fff3e0;
  --orange-border: #ffcc80;

  --green: #4caf50;
  --green-bg: #e8f5e9;
  --green-border: #a5d6a7;

  --gray: #666;
  --gray-bg: #f5f5f5;
  --gray-border: #bdbdbd;
}

/* ===========================================
   BASE STYLES - Override reveal.js defaults
   =========================================== */

.reveal {
  font-family: var(--body-font);
  font-size: var(--base-font-size);
}

/* Apply background colors */
.reveal-viewport {
  background-color: var(--background-color);
}

/* Section divider background via data-state */
.reveal-viewport.is-section-divider .slide-background.present {
  background-color: var(--section-divider-bg) !important;
}

.reveal h1,
.reveal h2,
.reveal h3,
.reveal h4,
.reveal h5,
.reveal h6 {
  font-family: var(--heading-font);
  text-transform: none;
  color: var(--text-color);
}

.reveal h1 { font-size: var(--h1-size); }
.reveal h2 { font-size: var(--h2-size); }
.reveal h3 { font-size: var(--h3-size); }

.reveal p,
.reveal li,
.reveal .callout,
.reveal blockquote {
  font-size: var(--text-size);
  color: var(--text-color);
}

/* Prevent double-sizing for nested elements */
.reveal .callout p,
.reveal .callout li,
.reveal blockquote p {
  font-size: inherit;
}

/* ===========================================
   SLIDE LAYOUT
   =========================================== */

.reveal .slides section {
  height: 100%;
  display: flex !important;
  flex-direction: column !important;
  padding: var(--slide-padding-top) var(--slide-padding) var(--slide-padding) var(--slide-padding) !important;
  box-sizing: border-box;
  text-align: left;
}

/* Vertical stack wrapper - no padding, just pass through */
.reveal .slides section.stack {
  padding: 0 !important;
}

/* Content area - fills remaining space */
.reveal .slides section > .content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding-top: var(--content-gap);
  text-align: left;
}

/* Footnotes at bottom */
.reveal .slides section > .footnote {
  position: absolute;
  bottom: 15px;
  left: var(--slide-padding);
  right: var(--slide-padding);
  font-size: var(--footnote-size);
  color: var(--muted-color);
}

/* ===========================================
   SECTION DIVIDERS - Centered title slides
   =========================================== */

.reveal .slides section.section-divider {
  display: flex !important;
  flex-direction: column !important;
  justify-content: center !important;
  align-items: center !important;
  text-align: center;
}

.reveal .slides section.section-divider h1 {
  font-size: 56pt;
  text-align: center;
}

.reveal .slides section.section-divider p {
  font-size: 20pt;
  color: var(--muted-color);
}

/* ===========================================
   TEXT SIZE UTILITIES

   Base text is 16pt - use these to scale UP when
   slides have less content and you want to fill space.
   =========================================== */

.text-lg { font-size: 18pt !important; }   /* Slightly larger */
.text-xl { font-size: 20pt !important; }   /* Medium emphasis */
.text-2xl { font-size: 24pt !important; }  /* Strong emphasis */
.text-3xl { font-size: 28pt !important; }  /* Very large */
.text-4xl { font-size: 32pt !important; }  /* Maximum body text */

/* Other text utilities */
.text-muted { color: var(--muted-color) !important; }
.text-center { text-align: center !important; }
.text-uppercase { text-transform: uppercase; letter-spacing: 0.1em; }
.font-light { font-weight: 300; }
.font-bold { font-weight: 600; }

/* ===========================================
   BOXES / CONTAINERS
   =========================================== */

/* Basic box - filled background with border */
.box {
  background: var(--box-bg);
  border: 1px solid var(--box-border);
  border-radius: var(--box-radius);
  padding: 20px;
  margin: 10px 0;
}

/* Outlined box - border only, no fill */
.box-outlined {
  border: 1px solid var(--box-border);
  border-radius: var(--box-radius);
  padding: 20px;
  margin: 10px 0;
}

/* ===========================================
   BLOCKQUOTES
   =========================================== */

.reveal blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: 20px;
  margin: 20px 0;
  font-style: italic;
  background: none;
  box-shadow: none;
  width: 100%;
  max-width: none;
}

.reveal blockquote cite {
  display: block;
  margin-top: 10px;
  font-style: normal;
  color: var(--muted-color);
}

/* ===========================================
   CALLOUTS - Accent-bordered containers
   =========================================== */

.callout {
  border-left: var(--accent-border-width) solid var(--primary-color);
  padding: 15px 20px;
  margin: 15px 0;
  background: #f9f9f9;
  border-radius: var(--box-radius);
}

/* Color variants */
.callout-blue {
  border-left-color: var(--blue);
  background: var(--blue-bg);
}

.callout-orange {
  border-left-color: var(--orange);
  background: var(--orange-bg);
}

.callout-green {
  border-left-color: var(--green);
  background: var(--green-bg);
}

.callout-gray {
  border-left-color: var(--gray);
  background: var(--gray-bg);
}

/* Bordered variant - adds border on all sides */
.callout-bordered {
  border: 1px solid var(--box-border);
  border-left: var(--accent-border-width) solid var(--primary-color);
}

.callout-bordered.callout-blue {
  border-color: var(--blue-border);
  border-left-color: var(--blue);
}

.callout-bordered.callout-orange {
  border-color: var(--orange-border);
  border-left-color: var(--orange);
}

.callout-bordered.callout-green {
  border-color: var(--green-border);
  border-left-color: var(--green);
}

.callout-bordered.callout-gray {
  border-color: var(--gray-border);
  border-left-color: var(--gray);
}

/* Top border variant */
.callout-top {
  border-left: none;
  border-top: var(--accent-border-width) solid var(--primary-color);
}

.callout-top.callout-blue { border-top-color: var(--blue); }
.callout-top.callout-orange { border-top-color: var(--orange); }
.callout-top.callout-green { border-top-color: var(--green); }
.callout-top.callout-gray { border-top-color: var(--gray); }

/* ===========================================
   OPTIONAL: TITLE WITH UNDERLINE

   Add this to presentations where you want
   a line under the slide title.
   =========================================== */

/*
.reveal .slides section > h1,
.reveal .slides section > h2 {
  flex-shrink: 0;
  margin: 0;
  padding-bottom: 15px;
  border-bottom: 2px solid var(--line-color);
}
*/

/* ===========================================
   OPTIONAL: DECORATIVE ELEMENTS
   =========================================== */

/* Top decorative line on all slides */
/*
.reveal .slides section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-color);
}
*/

/* Bottom decorative line */
/*
.reveal .slides section::after {
  content: '';
  position: absolute;
  bottom: 40px;
  left: var(--slide-padding);
  right: var(--slide-padding);
  height: 2px;
  background: var(--line-color);
}
*/