/* Improved Custom CSS for Gabors Data Analysis Presentation
 * Version: 0.3
 * Date: 2025-11-12
 * Iterations: 2 (with Gabor Bekes)
 * Model: Claude Sonnet 4.5 (2025-10-22)
 * Purpose: Enhanced presentation design with viridis color palette
 * Changes: Added fixed title positioning, improved fragment styling
 */

/* ===== BASE TYPOGRAPHY ===== */
.reveal {
    font-size: 1.6em !important;
}

/* ===== FIXED SLIDE TITLES ===== */
.reveal .slides section {
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
}

.reveal .slides section > h1:first-child,
.reveal .slides section > h2:first-child {
    position: sticky !important;
    top: 0 !important;
    z-index: 100 !important;
    width: 100% !important;
    background: white !important;
    padding: 0.5em 0 !important;
    margin-top: 0 !important;
}

/* Content area with scroll if needed */
.reveal .slides section > *:not(h1):not(h2) {
    flex-shrink: 0;
}

/* Regular paragraph line spacing */
.reveal p {
    line-height: 1.5;
    margin-bottom: 1em;
}

/* Headings improvements */
.reveal h1 {
    color: var(--viridis-1);
    margin-bottom: 0.8em;
    font-weight: 600;
}

.reveal h2 {
    color: var(--viridis-2);
    margin-bottom: 0.7em;
    border-bottom: 3px solid var(--viridis-4);
    padding-bottom: 0.3em;
}

.reveal h3 {
    color: var(--viridis-3);
    margin-bottom: 0.6em;
    margin-top: 1em;
}

/* ===== LIST STYLING ===== */
.reveal ul, 
.reveal ol {
    line-height: 1.3;
    margin-bottom: 1em;
}

.reveal li {
    margin-bottom: 0.6em;
}

/* Nested lists spacing */
.reveal li > ul,
.reveal li > ol {
    margin-top: 0.4em;
}

/* Emoji and icons in lists */
.reveal li::marker {
    color: var(--viridis-3);
}

/* ===== TABLE STYLING ===== */
.reveal table {
    font-size: 0.85em;
    line-height: 1.2;
    margin: 1.5em auto;
    border-collapse: collapse;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.reveal table td {
    padding: 0.4em 0.6em;
    border: 1px solid rgba(33, 145, 140, 0.2);
}

.reveal table th {
    font-size: 1.05em;
    padding: 0.5em 0.6em;
    font-weight: bold;
    background-color: var(--viridis-3);
    color: white;
    border: 1px solid rgba(33, 145, 140, 0.3);
}

/* Alternating row colors */
.reveal table tbody tr:nth-child(even) {
    background-color: rgba(33, 145, 140, 0.05);
}

/* ===== VIRIDIS COLOR PALETTE ===== */
:root {
  --viridis-1: #440154;  /* Dark purple */
  --viridis-2: #3b528b;  /* Purple-blue */
  --viridis-3: #21918c;  /* Teal */
  --viridis-4: #5ec962;  /* Green */
  --viridis-5: #fde725;  /* Yellow */
  --viridis-bg-light: rgba(33, 145, 140, 0.05);
  --viridis-border: rgba(33, 145, 140, 0.3);
}

/* ===== SLIDE BACKGROUNDS ===== */
.title-slide {
  background: linear-gradient(135deg, var(--viridis-1), var(--viridis-2), var(--viridis-3));
  color: white;
}

.title-slide h1,
.title-slide h2,
.title-slide .author,
.title-slide .date {
  color: white;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

/* Section break slides */
.section-break {
  background: linear-gradient(135deg, var(--viridis-2), var(--viridis-3));
  color: white;
  padding: 2em;
  text-align: center;
}

.section-break h1 {
  color: white;
  font-size: 2.5em;
  border: none;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

/* Thank you slide */
.thank-you-slide {
  background: linear-gradient(135deg, var(--viridis-3), var(--viridis-4));
  color: white;
  padding: 2em;
  text-align: center;
}

.thank-you-slide h2 {
  color: white;
  border: none;
  font-size: 2em;
  margin-bottom: 1em;
}

.thank-you-slide p,
.thank-you-slide a {
  color: white;
  font-size: 1.1em;
}

/* ===== CUSTOM ELEMENTS ===== */

/* Visualization frames */
.visualization {
  border: 3px solid var(--viridis-1);
  border-radius: 10px;
  padding: 1.5rem;
  background: var(--viridis-bg-light);
  margin: 1em 0;
}

/* Highlight styling */
.highlight {
  color: var(--viridis-5);
  font-weight: bold;
  background-color: rgba(68, 1, 84, 0.1);
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

/* Emphasis styling */
.reveal strong {
  color: var(--viridis-1);
  font-weight: 600;
}

.reveal em {
  color: var(--viridis-3);
  font-style: italic;
}

/* ===== CALLOUTS ===== */
.reveal .callout {
  font-size: 1em;
  background: linear-gradient(to right, 
    rgba(33, 145, 140, 0.15), 
    rgba(33, 145, 140, 0.05));
  border-left: 6px solid var(--viridis-3);
  border-radius: 0 8px 8px 0;
  padding: 1.2rem 1.5rem;
  margin: 1.5rem 0;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.reveal .callout p,
.reveal .callout strong {
  font-size: 1.3em;
  line-height: 1.4;
  margin: 0;
}

.reveal .callout strong {
  color: var(--viridis-1);
}

/* ===== LINKS ===== */
.reveal a {
  color: var(--viridis-3);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-bottom 0.3s ease;
}

.reveal a:hover {
  color: var(--viridis-2);
  border-bottom: 2px solid var(--viridis-4);
}

/* ===== IMAGES ===== */
.reveal img {
  border: 2px solid var(--viridis-border);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  margin: 1em auto;
}

/* ===== PROGRESS BAR ===== */
.reveal .progress {
  background: rgba(33, 145, 140, 0.2);
  color: var(--viridis-4);
  height: 6px;
}

.reveal .progress span {
  background: linear-gradient(to right, var(--viridis-3), var(--viridis-4));
}

/* ===== SLIDE NUMBERS ===== */
.reveal .slide-number {
  background-color: var(--viridis-3);
  color: white;
  font-size: 0.8em;
  padding: 0.3em 0.6em;
  border-radius: 4px;
}

/* ===== FOOTER ===== */
.reveal .footer {
  font-size: 0.6em;
  color: var(--viridis-2);
  opacity: 0.7;
}

/* ===== CODE BLOCKS ===== */
.reveal code {
  background-color: var(--viridis-bg-light);
  color: var(--viridis-1);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  font-family: 'Courier New', monospace;
}

.reveal pre {
  background-color: var(--viridis-bg-light);
  border-left: 4px solid var(--viridis-3);
  padding: 1em;
  border-radius: 6px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

/* ===== ACCESSIBILITY ===== */
.reveal :focus {
  outline: 3px solid var(--viridis-4);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .reveal {
    --viridis-1: #2d0051;
    --viridis-2: #1e3557;
    --viridis-3: #006b67;
  }
}

/* ===== COLUMN LAYOUTS ===== */
.reveal .columns {
  display: flex;
  gap: 2em;
  align-items: flex-start;
}

.reveal .column {
  flex: 1;
}

/* Vertical alignment for columns */
.reveal .columns.valign-center {
  align-items: center;
}

.reveal .columns.valign-top {
  align-items: flex-start;
}

/* Better spacing within columns */
.reveal .column > *:first-child {
  margin-top: 0;
}

.reveal .column > *:last-child {
  margin-bottom: 0;
}

/* Column images */
.reveal .column img {
  max-width: 100%;
  height: auto;
}

/* ===== FRAGMENT/PAUSE STYLING ===== */
.reveal .fragment {
  transition: opacity 0.3s ease;
}

.reveal .fragment.visible {
  opacity: 1;
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 768px) {
  .reveal {
    font-size: 1.4em !important;
  }
  
  .reveal h2 {
    font-size: 1.4em;
  }
  
  .reveal .callout {
    padding: 1rem;
  }
  
  /* Stack columns on mobile */
  .reveal .columns {
    flex-direction: column;
    gap: 1em;
  }
}