/* AI 2027 - Retro Terminal Style (White & Green) */

/* CSS Variables for theming */
:root {
  --bg-primary: #f5f5f0;
  --bg-secondary: #e8e8e0;
  --bg-paper: #fafaf5;
  --border-color: #2d5a3d;
  --border-light: #7cb992;
  --text-primary: #1a1a18;
  --text-secondary: #3d3d38;
  --accent-dark: #1e4d2b;
  --accent-main: #2d7a4a;
  --accent-light: #4a9d6a;
  --accent-pale: #d4e8dc;
  --heading-color: #1a3d28;
  --link-color: #2d7a4a;
  --link-hover: #1e4d2b;
  --shadow-color: rgba(45, 90, 61, 0.15);
  --selection-bg: #b8d4c4;
}

/* Selection styling */
::selection {
  background: var(--selection-bg);
  color: var(--heading-color);
}

/* Base reset and body styling */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  font-family: "Meiryo", "Yu Gothic", "Hiragino Sans", "Hiragino Kaku Gothic ProN", serif;
  line-height: 2;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  background-image: 
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 31px,
      rgba(45, 90, 61, 0.03) 31px,
      rgba(45, 90, 61, 0.03) 32px
    );
  min-height: 100vh;
  padding: 2rem 1rem;
}

/* Decorative header stripe */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 8px;
  background: repeating-linear-gradient(
    90deg,
    var(--accent-dark) 0px,
    var(--accent-dark) 20px,
    var(--accent-main) 20px,
    var(--accent-main) 40px,
    var(--accent-light) 40px,
    var(--accent-light) 60px
  );
  z-index: 1000;
}

/* Main content container */
body > h1:first-of-type,
body > p,
body > b,
body > h2,
body > hr,
body > ul,
body > ol {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Main title styling */
h1 {
  font-family: "Meiryo", "Yu Gothic", "Hiragino Sans", "Hiragino Kaku Gothic ProN", serif;
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  color: var(--heading-color);
  margin-top: 2rem;
  margin-bottom: 2rem;
  padding: 1.5rem 2rem;
  background: var(--bg-paper);
  border: 3px double var(--border-color);
  border-radius: 0;
  box-shadow: 
    4px 4px 0 var(--accent-pale),
    8px 8px 0 var(--border-light);
  letter-spacing: 0.2em;
  position: relative;
}

h1::before,
h1::after {
  content: "❧";
  color: var(--accent-main);
  font-size: 1.5rem;
  margin: 0 0.5rem;
}

/* Author names styling */
.authors {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  max-width: 800px;
  margin: 0 auto 1.5rem;
  padding: 1rem 1.5rem;
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  box-shadow: 2px 2px 0 var(--shadow-color);
}

.authors span {
  font-weight: 600;
  font-style: italic;
  color: var(--accent-dark);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.authors span:not(:last-child)::after {
  content: "・";
  margin-left: 0.5rem;
  color: var(--accent-main);
  font-style: normal;
}

/* Section headings */
h2 {
  font-family: "Meiryo", "Yu Gothic", "Hiragino Sans", "Hiragino Kaku Gothic ProN", serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--bg-paper);
  background: linear-gradient(180deg, var(--accent-main) 0%, var(--accent-dark) 100%);
  margin-top: 3rem;
  margin-bottom: 1.5rem;
  padding: 0.8rem 1.5rem;
  border: none;
  position: relative;
  box-shadow: 3px 3px 0 var(--accent-pale);
}

h2::before {
  content: "§";
  margin-right: 0.75rem;
  font-weight: normal;
}

h2::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 20px;
  right: 20px;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--accent-light) 0px,
    var(--accent-light) 4px,
    transparent 4px,
    transparent 8px
  );
}

/* Paragraph styling */
p {
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  padding: 1rem 1.5rem;
  background: var(--bg-paper);
  border-left: 4px solid var(--accent-main);
  border-right: 1px solid var(--border-light);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 2px 2px 0 var(--shadow-color);
  text-align: justify;
  text-indent: 1em;
  transition: all 0.2s ease;
}

p:hover {
  border-left-color: var(--accent-dark);
  border-left-width: 6px;
  background: #ffffff;
  transform: translateX(2px);
}

/* First letter styling for paragraphs */
p::first-letter {
  font-size: 1.1em;
  font-weight: 600;
  color: var(--accent-dark);
}

/* Horizontal rule styling */
hr {
  border: none;
  height: auto;
  margin: 2.5rem auto;
  text-align: center;
  background: transparent;
}

hr::before {
  content: "✦ ✦ ✦";
  display: block;
  color: var(--accent-main);
  font-size: 1.2rem;
  letter-spacing: 1rem;
  position: relative;
}

hr::after {
  content: "";
  display: block;
  width: 60%;
  height: 2px;
  margin: 0.5rem auto 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--border-light) 20%,
    var(--accent-main) 50%,
    var(--border-light) 80%,
    transparent 100%
  );
}

/* List styling */
ul,
ol {
  list-style: none;
  margin-bottom: 1.25rem;
  padding: 1rem 1.5rem;
  background: var(--bg-paper);
  border-left: 4px solid var(--accent-main);
  border-right: 1px solid var(--border-light);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  box-shadow: 2px 2px 0 var(--shadow-color);
  transition: all 0.2s ease;
}

ul:hover,
ol:hover {
  border-left-color: var(--accent-dark);
  border-left-width: 6px;
  background: #ffffff;
  transform: translateX(2px);
}

/* Nested lists styling reset */
ul ul,
ul ol,
ol ul,
ol ol {
  margin-bottom: 0;
  padding: 0.5rem 0 0.5rem 1rem;
  background: transparent;
  border: none;
  box-shadow: none;
}

ul ul:hover,
ul ol:hover,
ol ul:hover,
ol ol:hover {
  background: transparent;
  transform: none;
  border: none;
}

li {
  padding-left: 1.25rem;
  position: relative;
}

li::before {
  content: "»";
  position: absolute;
  left: 0;
  color: var(--accent-main);
  font-weight: 700;
}

ol {
  counter-reset: item;
}

ol > li {
  counter-increment: item;
  padding-left: 1.5rem;
}

ol > li::before {
  content: counter(item) ".";
}

/* Image styling */
img {
  display: block;
  max-width: min(100%, 800px);
  height: auto;
  margin: 2rem auto;
  padding: 0.5rem;
  background: var(--bg-paper);
  border: 1px solid var(--border-light);
  box-shadow: 3px 3px 0 var(--shadow-color);
}

/* Links styling */
a {
  color: var(--link-color);
  text-decoration: none;
  border-bottom: 1px dashed var(--link-color);
  transition: all 0.2s ease;
  font-weight: 500;
}

a:hover {
  color: var(--link-hover);
  border-bottom-style: solid;
  background: var(--accent-pale);
  padding: 0 0.2em;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 12px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-light);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-light), var(--accent-main));
  border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--accent-main), var(--accent-dark));
}

/* Retro decorative corners for main content area */
body > p:first-of-type::before {
  content: "┌";
  position: absolute;
  top: -0.5rem;
  left: -0.5rem;
  font-size: 1.5rem;
  color: var(--accent-main);
  font-family: monospace;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  html {
    font-size: 16px;
  }
  
  body {
    padding: 1rem 0.75rem;
    padding-top: 2rem;
  }
  
  h1 {
    font-size: 1.75rem;
    padding: 1.25rem 1.5rem;
    letter-spacing: 0.1em;
    box-shadow: 
      3px 3px 0 var(--accent-pale),
      6px 6px 0 var(--border-light);
  }
  
  h1::before,
  h1::after {
    display: none;
  }
  
  h2 {
    font-size: 1.25rem;
    padding: 0.7rem 1.25rem;
    margin-top: 2rem;
  }
  
  p {
    padding: 0.875rem 1.25rem;
    text-align: left;
    text-indent: 0;
  }
  
  ul {
    padding: 0.875rem 1.25rem;
    text-align: left;
  }

  .authors {
    padding: 0.75rem 1rem;
    gap: 0.25rem 0.5rem;
  }

  .authors span {
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
    padding: 1rem;
    box-shadow: 
      2px 2px 0 var(--accent-pale),
      4px 4px 0 var(--border-light);
  }
  
  h2 {
    font-size: 1.1rem;
    padding: 0.6rem 1rem;
  }
  
  h2::after {
    left: 10px;
    right: 10px;
  }
  
  p {
    padding: 0.75rem 1rem;
    border-left-width: 3px;
  }
  
  li {
    padding-left: 1rem;
  }

  hr::before {
    letter-spacing: 0.5rem;
  }
}

/* Print styles */
@media print {
  body {
    background: white;
    background-image: none;
    color: black;
    padding: 0;
  }
  
  body::before {
    display: none;
  }
  
  h1, h2, p, ul, ol, .authors, .authors span {
    background: none;
    border: none;
    box-shadow: none;
    color: black;
  }
  
  h1 {
    border-bottom: 2px solid black;
  }
  
  h1::before,
  h1::after {
    display: none;
  }
  
  h2 {
    background: none;
    color: black;
    border-left: 3px solid black;
    padding-left: 1rem;
  }
  
  h2::after {
    display: none;
  }
  
  p {
    border-left: 2px solid #333;
  }
  
  ul, ol {
    padding-left: 1rem;
    border-left: 2px solid #333;
  }

  hr::before,
  hr::after {
    display: none;
  }
  
  hr {
    border-top: 1px solid black;
  }
}