/* ============================================
   Kamino Website - Custom CSS
   Modern Minimal Design System
   ============================================ */

/* ============================================
   CSS Variables - Design Tokens
   ============================================ */
:root {
  /* Color Palette */
  --color-primary: #0066CC;
  --color-primary-dark: #004C99;
  --color-primary-light: #3385E0;
  --color-accent: #FF6B35;
  --color-accent-light: #FF8555;
  --color-text: #1A1A1A;
  --color-text-muted: #6B6B6B;
  --color-background: #FFFFFF;
  --color-surface: #F8F9FA;
  --color-surface-dark: #E9ECEF;
  --color-border: #DEE2E6;
  --color-code-bg: #F5F5F5;
  --color-success: #28A745;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', monospace;

  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;     /* 18px */
  --font-size-xl: 1.25rem;      /* 20px */
  --font-size-2xl: 1.5rem;      /* 24px */
  --font-size-3xl: 1.875rem;    /* 30px */
  --font-size-4xl: 2.25rem;     /* 36px */
  --font-size-5xl: 3rem;        /* 48px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Spacing Scale (8px base) */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */
  --space-4xl: 6rem;      /* 96px */

  /* Layout */
  --content-width: 1200px;
  --content-narrow: 800px;
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

/* ============================================
   Reset & Base Styles
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--space-md);
  line-height: var(--line-height-relaxed);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

ul, ol {
  margin-left: var(--space-xl);
  margin-bottom: var(--space-md);
}

li {
  margin-bottom: var(--space-sm);
  line-height: var(--line-height-relaxed);
}

.text-muted {
  color: var(--color-text-muted);
}

.text-center {
  text-align: center;
}

/* ============================================
   Layout System
   ============================================ */
.section-wrapper {
  width: 100%;
  padding-inline: var(--space-lg);
  padding-block: var(--space-2xl);
}

.content-container {
  max-width: var(--content-width);
  margin-inline: auto;
}

.content-narrow {
  max-width: var(--content-narrow);
  margin-inline: auto;
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.main-nav {
  max-width: var(--content-width);
  margin-inline: auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-menu {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
  margin: 0;
}

.nav-menu a {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  transition: background-color var(--transition-fast);
}

.nav-menu a:hover {
  background-color: var(--color-surface);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  cursor: pointer;
  padding: var(--space-sm);
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
  padding-block: var(--space-2xl);
  text-align: center;
  background: linear-gradient(135deg, #f5f7fa 0%, #ffffff 100%);
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

.authors-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs) var(--space-sm);
  margin-bottom: var(--space-xl);
}

.author {
  font-size: var(--font-size-lg);
  color: var(--color-text);
}

.author-separator {
  color: var(--color-text-muted);
}

.author-break {
  flex-basis: 100%;
  height: 0;
  width: 0;
  overflow: hidden;
}

@media (max-width: 768px) {
  .author-break {
    display: none;
  }

  .authors-list {
    gap: var(--space-xs);
  }
}

.affiliations {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
}

.publication-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  margin-top: var(--space-2xl);
}

.publication-venue {
  display: inline-block;
  background-color: var(--color-surface);
  color: var(--color-text);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--border-radius-md);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-md);
}

.publication-awards {
  color: var(--color-accent);
  font-weight: var(--font-weight-bold);
  margin-top: var(--space-sm);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-sans);
}

.btn-primary {
  background-color: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: black;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-surface-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* ============================================
   Sections
   ============================================ */
.abstract-section {
  background-color: var(--color-background);
}

.abstract-section .section-wrapper {
  padding-block-start: var(--space-lg);
}

.video-showcase {
  padding-block: var(--space-4xl);
  background-color: var(--color-surface);
}

.overview-section {
  padding-block: var(--space-4xl);
  background-color: var(--color-background);
}

.use-cases-section {
  padding-block: var(--space-4xl);
  background-color: var(--color-surface);
}

.ecosystem-section {
  padding-block: var(--space-4xl);
  background-color: var(--color-background);
}

.examples-gallery {
  padding-block: var(--space-4xl);
  background-color: var(--color-surface);
}

.usage-section {
  padding-block: var(--space-4xl);
  background-color: var(--color-background);
}

.acknowledgements-section {
  padding-block: var(--space-4xl);
  background-color: var(--color-surface);
}

.citations-section {
  padding-block: var(--space-4xl);
  background-color: var(--color-background);
}

/* ============================================
   Video Components
   ============================================ */
.video-container {
  position: relative;
  width: 100%;
  max-width: 1000px;
  margin-inline: auto;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.video-container video {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.video-card {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  background-color: var(--color-background);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.video-card video {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

.video-card-label {
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  background-color: var(--color-surface);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.gallery-section-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-lg);
  margin-top: var(--space-3xl);
}

.gallery-section-title:first-child {
  margin-top: 0;
}

/* ============================================
   Code Blocks & Citations
   ============================================ */
.code-container {
  position: relative;
  background-color: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  margin-block: var(--space-lg);
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md);
  background-color: var(--color-surface-dark);
  border-bottom: 1px solid var(--color-border);
}

.code-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

pre {
  padding: var(--space-lg);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  background-color: var(--color-code-bg);
  margin: 0;
}

code {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  background-color: var(--color-code-bg);
  padding: 0.125rem 0.25rem;
  border-radius: var(--border-radius-sm);
}

.citation-container {
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  overflow: hidden;
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.citation-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.citation-title {
  font-family: var(--font-mono);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

.citation-content {
  padding: var(--space-lg);
}

.citation-content pre {
  background-color: transparent;
  padding: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

/* Copy Button */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  cursor: pointer;
  transition: all var(--transition-base);
}

.copy-btn:hover {
  background-color: var(--color-surface);
  border-color: var(--color-primary);
}

.copy-btn.copied {
  background-color: var(--color-success);
  border-color: var(--color-success);
  color: white;
}

.copy-btn .icon-copy,
.copy-btn .icon-check {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-base);
}

.copy-btn.copied .icon-check {
  transform: scale(1.1);
}

/* ============================================
   SVG Diagram
   ============================================ */
.diagram-container {
  max-width: 800px;
  margin-inline: auto;
  margin-block: var(--space-2xl);
}

.diagram-container svg {
  width: 100%;
  height: auto;
  display: block;
}

/* ============================================
   Two Column Layout
   ============================================ */
.two-column {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  padding-block: var(--space-3xl);
  background-color: var(--color-surface-dark);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.site-footer p {
  margin-bottom: var(--space-sm);
}

.site-footer a {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }

/* Fade in observer target */
.fade-in-section {
  opacity: 0;
}

.fade-in-section.is-visible {
  opacity: 1;
  animation: fadeInUp 0.6s ease forwards;
}

/* ============================================
   GitHub Gist Embed Overrides
   ============================================ */
.gist-container {
  margin-block: var(--space-2xl);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
  }

  .section-wrapper {
    padding-inline: var(--space-md);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .two-column {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-background);
    flex-direction: column;
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .publication-links {
    flex-direction: column;
  }

  .hero-title {
    font-size: var(--font-size-4xl);
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
  }

  .section-wrapper {
    padding-block: var(--space-2xl);
  }

  .hero-section {
    padding-block: var(--space-2xl);
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.hidden {
  display: none;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
  /* Page setup */
  @page {
    margin: 2cm;
    size: A4;
  }

  /* Reset colors and backgrounds */
  * {
    background: transparent !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  /* Hide interactive elements */
  .site-header,
  .nav-toggle,
  .publication-links,
  .copy-btn,
  button {
    display: none !important;
  }

  /* Reset fade-in animations for print */
  .fade-in-section {
    opacity: 1 !important;
    transform: none !important;
  }

  /* Show videos as static frames */
  video {
    max-width: 100%;
    height: auto;
    page-break-inside: avoid;
    display: block !important;
    margin: 10pt auto;
    border: 1px solid #ddd !important;
  }

  .video-container,
  .video-showcase {
    display: block !important;
    page-break-inside: avoid;
  }

  .video-container {
    max-width: 100%;
    padding: 0 !important;
  }

  /* Show main content */
  .site-content {
    width: 100%;
    max-width: none;
  }

  /* Headers */
  h1 {
    font-size: 24pt;
    font-weight: bold;
    margin-bottom: 12pt;
    page-break-after: avoid;
  }

  h2 {
    font-size: 18pt;
    font-weight: bold;
    margin-top: 18pt;
    margin-bottom: 10pt;
    page-break-after: avoid;
  }

  h3 {
    font-size: 14pt;
    font-weight: bold;
    margin-top: 12pt;
    margin-bottom: 8pt;
    page-break-after: avoid;
  }

  /* Paragraphs */
  p {
    orphans: 3;
    widows: 3;
    margin-bottom: 10pt;
  }

  /* Links - show URLs */
  a[href]:after {
    content: " (" attr(href) ")";
    font-size: 9pt;
    color: #666 !important;
  }

  a[href^="#"]:after,
  a[href^="javascript:"]:after {
    content: "";
  }

  /* Lists */
  ul, ol {
    margin-bottom: 10pt;
  }

  li {
    margin-bottom: 6pt;
  }

  /* Code blocks */
  pre, code {
    border: 1px solid #ddd !important;
    page-break-inside: avoid;
    font-size: 9pt;
    font-family: 'Courier New', monospace;
  }

  pre {
    padding: 10pt;
    margin: 10pt 0;
    white-space: pre-wrap;
    word-wrap: break-word;
  }

  /* Tables */
  table {
    border-collapse: collapse;
    width: 100%;
    page-break-inside: avoid;
  }

  th, td {
    border: 1px solid #ddd !important;
    padding: 6pt;
  }

  /* Authors and affiliations */
  .authors-list {
    margin-bottom: 8pt;
  }

  .author {
    font-size: 11pt;
  }

  .affiliations {
    font-size: 10pt;
    color: #333 !important;
    margin-bottom: 12pt;
  }

  /* Sections */
  section {
    page-break-inside: avoid;
    margin-bottom: 20pt;
  }

  .section-wrapper {
    padding: 0 !important;
  }

  /* Abstract */
  .abstract-section {
    background: #f5f5f5 !important;
    padding: 12pt !important;
    border: 1px solid #ddd !important;
    page-break-inside: avoid;
  }

  /* Gallery - show labels only */
  .gallery-grid {
    display: block;
  }

  .video-card {
    page-break-inside: avoid;
    margin-bottom: 8pt;
    border: 1px solid #ddd !important;
    padding: 8pt;
  }

  .video-card-label {
    display: block !important;
    font-weight: bold;
    color: black !important;
  }

  /* SVG diagrams - ensure visibility */
  svg {
    max-width: 100%;
    height: auto;
    page-break-inside: avoid;
  }

  /* Citation blocks */
  .citation-container {
    border: 1px solid #ddd !important;
    padding: 10pt;
    page-break-inside: avoid;
    margin: 10pt 0;
  }

  /* Footer */
  .site-footer {
    margin-top: 20pt;
    padding-top: 10pt;
    border-top: 1px solid #ddd !important;
    font-size: 10pt;
  }

  /* Avoid page breaks */
  .content-container,
  .content-narrow,
  .diagram-container {
    page-break-inside: avoid;
  }

  /* Ensure good contrast */
  .btn,
  .nav-logo {
    color: black !important;
    border: 1px solid black !important;
  }
}