/* Basic reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Typography */
:root {
  --font-heading: 'Noto Sans', sans-serif;
  /* Elegant serif for headings */
  --font-body: 'Merriweather', serif;
  /* Crisp sans-serif for body text */
  --font-section-body: 'Merriweather', serif;
  --font-section-heading: 'Noto Sans', sans-serif;
  --font-code: 'Source Code Pro', Courier, monospace;
  /* Monospace for code */
  --font-size-base: 1rem;
  --line-height-base: 1.6;
  --color-text: #000000;
  --color-background: #FFFFFF;
  --color-primary: #EC1D26;
  --color-secondary: #004FFF;
  --color-icon: #EC1D26;
  --color-accent: #707070;

}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-background);
}

/* Centered content column */
.centered-column {
  max-width: 45rem;
  margin: 0 auto;
  padding: 2rem 1rem;
}

#intro {
  text-align: center;
}

.sub-heading {
  color: var(--color-secondary);
  font-style: oblique;
  /*! font-weight: bolder; */
}

.contact {
  color: var(--color-secondary);
  font-family: var(--font-heading);
  font-weight: bolder;
}

.section-divider {
  border: 0;
  height: 1px;
  margin: 3rem auto;
  max-width: 280px;
  background-image: linear-gradient(to right,
      transparent 20%,
      var(--color-accent) 50%,
      transparent 80%);
  position: relative;
}

/* Filled diamond with subtle shadow */
.section-divider::after {
  content: '';
  position: absolute;
  left: 50%;
  top: -3px;
  width: 8px;
  /* Reduced size */
  height: 8px;
  /* Reduced size */
  background: var(--color-icon);
  transform: translateX(-50%) rotate(45deg);
  box-shadow: 0 0 0 2px var(--color-background);
  /* Slimmer outline */
}

/* Hover: Gentle color shift + rotation */
.section-divider:hover::after {
  transform: translateX(-50%) rotate(135deg);
  background: var(--color-secondary);
  transition: all 0.4s ease;
}

/* Section container */
.section {
  position: relative;
  /* Anchor for absolute positioning */
  margin-bottom: 4rem;
  padding: 1rem 0rem 0rem 1rem
}

.section-title {
  font-family: var(--font-section-heading);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
  text-transform: full-size-kana;
}

.section-title--left {
  left: -15rem;
  text-align: right;
  position: absolute;
}

.section-title--right {
  right: -15rem;
  text-align: left;
  position: absolute;
}

.section-title--center {
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  width: auto;
  /* Override 20rem */
  position: relative;
  /* Change to relative if in flow */
  margin: 0 auto 2.5rem;
  /* Center in parent */
}

/* Squiggle Positioning Adjustments */
.section-title--left::after {
  right: 0;
}

.section-title--right::after {
  left: 0;
}

.section-title--center::after {
  left: 50%;
  transform: translateX(-50%);
}

.section-title::before,
.section-title::after {
  color: var(--color-primary);
  font-family: var(--font-code);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.section-title::before {
  content: '[ ';
  margin-right: 0.25rem;
}

.section-title::after {
  content: ' ]';
  margin-left: 0.25rem;
}

.section.active .section-title::before,
.section.active .section-title::after {
  opacity: 1;
}

/* Doodles */
.doodle {
  width: 15rem;
  position: absolute;
  bottom: 0;
}

.doodle--left {
  left: -16rem;
  /* Position to the left of the column */
}

.doodle--right {
  right: -16rem;
  /* Position to the right of the column */
}

/* New centered modifier */
.doodle--center {
  left: 50%;
  transform: translateX(-50%);
  right: auto;
  /* Reset right position */
  z-index: -1;
  /* Optional: keep behind content */
  top: 100%;
  margin-top: 3rem;
}

.flip {
  transform: scaleX(-1);
}

/* Doodle Transition */
.section.active .doodle {
  animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
  0% {
    opacity: 0;
    transform: translateY(10px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Cards/Panels */
.carousel {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

.card {
  background-color: #ffffff;
  color: var(--color-text);
  padding: 2rem 1.75rem;
  margin-bottom: 2.5rem;
  position: relative;
  display: none;

  border: 1px solid #e1e1e1;
  border-left: 4px solid transparent;
  border-radius: 0;

  transition:
    border-left-color 0.3s ease,
    border-color 0.3s ease,
    background-color 0.3s ease;
}

.card.active {
  display: block;
  border-left-color: var(--color-primary);
  background-color: #ffffff;
}

/* Font Awesome icon placement */
.card .icon {
  font-size: 1.25rem;
  color: var(--color-primary);
  background-color: transparent;
  border: none;

  position: absolute;
  top: 1.25rem;
  right: 1.25rem;

  display: flex;
  align-items: center;
  justify-content: center;

  width: auto;
  height: auto;
  padding: 0;
  font-family: "Font Awesome 6 Free", var(--font-code);
  font-weight: 900;
  /* Ensure solid style if needed */
}

/* Headings */
.card h4 {
  font-family: var(--font-section-heading);
  /* Noto Sans */
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

/* Paragraphs / Body */
.card p {
  font-family: var(--font-section-body);
  /* Merriweather */
  font-size: 1rem;
  line-height: 1.7;
  padding-right: 3.5rem;
  margin: 0;
  color: var(--color-text);
}

/* Code blocks */
.card pre {
  font-family: var(--font-code);
  background-color: #f8f9fa !important;
  color: var(--color-text);
  padding: 1rem;
  border-radius: 4px;
  margin: 2.5rem 0 0 0 !important;
  white-space: pre-wrap !important;
  border-top: 1px solid #e6e6e6;
  padding-top: 1.5rem;
}

.card-image {
  height: 150px;
}

/* Carousel Navigation */
.carousel-nav {
  position: absolute;
  bottom: -2rem;
  right: 0;
  display: flex;
  gap: 0.5rem;
}

.carousel-nav button {
  background: none;
  border: none;
  color: var(--color-icon);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.3s ease;
}

.carousel-nav button:hover {
  background-color: rgba(0, 0, 0, 0.05);
  color: var(--color-text);
}

.carousel-nav button:focus {
  outline: 2px solid var(--color-primary);
}


/* === Slim Two-Column Books === */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.book-entry {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  /* Reduced from 1.5rem */
  align-items: start;
}

.book-icon {
  width: 2rem;
  /* Smaller icon container */
  height: 2rem;
  font-size: 1rem;
  /* Smaller icon */
  color: var(--color-primary);
}

.book-details {
  gap: 0.2rem;
  /* Tighter vertical spacing */
}

.book-title {
  font-size: 1rem;
  /* Slightly smaller */
  line-height: 1.2;
  font-family: var(--font-heading);
}

.book-author {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-family: var(--font-heading);
}

.book-takeaway {
  font-size: 0.9rem;
  margin-top: 0.3rem;
  /* Reduced from 0.5rem */
  line-height: 1.3;
}

/* ===== AI Section Styles ===== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

/* Add these 6 lines to your existing CSS */
.ai-point {
  position: relative;
  /* Required for absolute positioning */
  overflow: hidden;
  /* Contain SVG within card bounds */
}

.ai-point svg.circuit {
  position: absolute;
  bottom: -10px;
  right: -15px;
  width: 120px;
  /* Control visible size */
  height: auto;
  pointer-events: none;
  /* Make SVG non-interactive */
  transition: opacity 0.3s ease;
}

/* Existing Title/Pattern Styles (Unchanged) */
.ai-point h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  margin-bottom: 0.8rem;
  position: relative;
  padding-right: 4em;
}

.ai-point h3::after {
  content: attr(data-pattern);
  font-family: var(--font-code);
  font-size: 1.2rem;
  color: var(--color-primary);
  opacity: 0.3;
  position: absolute;
  top: 0;
  transition: opacity 0.3s ease;
  padding-left: 1rem;
  transform: translateY(-5%);
}

.ai-point:hover h3::after {
  opacity: 0.6;
}

.ai-point p {
  font-size: 0.95rem;
  line-height: 1.5;
  opacity: 0.8;
}

.site-footer-meta {
  position: fixed;
  justify-content: space-between;
  bottom: 12px;
  right: 16px;
  display: flex;
  flex-wrap: wrap; /* handles small screens */
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
  color: var(--color-icon);
  opacity: 0.6;
  z-index: 1000;
  font-family: var(--font-sans);
}

.footer-badge {
  display: flex;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
  pointer-events: none; /* Avoid accidental hover interactions */
}

.visitor-badge {
  height: 20px;
}

.site-footer-meta:hover .footer-badge {
  opacity: 1;
  pointer-events: auto;
}

.footer-divider {
  color: var(--color-icon);
  opacity: 0.4;
}

.footer-link {
  color: var(--color-icon);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-icon);
}

.footer-link:hover {
  opacity: 0.9;
  border-bottom: 1px solid var(--color-icon);
}

.cc-badge {
  height: 1rem;
  vertical-align: middle;
  opacity: 0.8;
  transition: opacity 0.3s;
}

.cc-badge:hover {
  opacity: 1;
}

@media (max-width: 768px) {

  /* Tweak doodle and section titles — retain structure, don't center everything */
  .section .section-title--left,
  .section .section-title--right {
    position: static;
    margin: 1rem 0;
    text-align: left;
  }

  .section .doodle--left,
  .section .doodle--right {
    position: static;
    margin: 1rem auto 2rem;
    display: block;
  }

  /* Prevent centering of everything by default */
  .section {
    padding: 1.5rem 1rem;
  }

  .section-title--center {
    font-size: 1.1rem;
    padding: 0 1rem;
    line-height: 1.3;
    word-break: break-word;
    margin: 0 auto 2rem;
    text-align: center;
  }

  /* Maintain layout for ai-grid and book-grid if already good */
  /* Just ensure no forced stacking unless needed */
  .ai-grid,
  .book-grid {
    gap: 1.5rem;
  }

  /* Card Mobile Layout */
  .carousel {
    padding: 0 1rem 4rem;
    margin: 0 auto;
  }

  .card {
    width: 100% !important;
    margin: 0;
    padding: 1.5rem;
  }

  /* Icon & Heading Alignment Fix */
  .card-header {
    display: flex !important;
    flex-direction: column !important;
    align-items: flex-start !important;
    position: relative;
    margin-bottom: 1rem;
  }

  .card .icon {
    order: -1 !important;
    position: static !important;
    float: none !important;
    margin: 0 0 0.5rem 0 !important;
    font-size: 1.8rem;
    transform: none !important;
    top: auto !important;
    right: auto !important;
  }

  .card h4 {
    order: 0 !important;
    margin: 0 !important;
    padding: 0 !important;
    width: 100%;
  }

  /* Navigation Positioning */
  .carousel-nav {
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    gap: 2rem;
  }

  .carousel-nav button {
    font-size: 1.8rem;
    padding: 0;
  }

  .comparison-table {
    table-layout: auto;
    border-collapse: collapse;
    word-wrap: break-word;
    font-size: 0.9rem;
  }


  .comparison-table img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
  }

  .site-footer-meta {
    flex-direction: column;
    align-items: center;
    text-align: center;
    font-size: 0.65rem;
    right: 8px;
    bottom: 8px;
  }

  .footer-right {
    justify-content: center;
  }

}