/* ==========================================================================
   pyk.ee Projects Page Styles
   Portal/Aperture Science Terminal Aesthetic
   ========================================================================== */

/* --------------------------------------------------------------------------
   Font Faces - Self-hosted JetBrains Mono
   -------------------------------------------------------------------------- */

@font-face {
  font-family: 'JetBrains Mono';
  src: url('/fonts/JetBrainsMono/JetBrainsMono-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('/fonts/JetBrainsMono/JetBrainsMono-Bold.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* --------------------------------------------------------------------------
   CSS Custom Properties - Portal/Aperture Palette
   -------------------------------------------------------------------------- */

:root {
  /* Colours */
  --color-amber: #FF9900;
  --color-amber-light: #FFB000;
  --color-amber-dim: rgba(255, 153, 0, 0.6);
  --color-bg: #000000;
  --color-bg-elevated: #0a0a0a;

  /* Typography */
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-hero: 2.5rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  /* Layout */
  --max-width: 60rem;
  --nav-height: 3.5rem;

  /* Animation */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
}

/* --------------------------------------------------------------------------
   Base Reset and Typography
   -------------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-mono);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-amber);
  background-color: var(--color-bg);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* CRT Scanlines Effect */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.1) 2px,
    rgba(0, 0, 0, 0.1) 4px
  );
  pointer-events: none;
  z-index: 1000;
}

/* Ambient Glow Effect */
body::after {
  content: '';
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 150%;
  height: 150%;
  background: radial-gradient(
    ellipse at center,
    rgba(255, 153, 0, 0.03) 0%,
    transparent 50%
  );
  pointer-events: none;
  z-index: -1;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-amber-light);
}

h1 {
  font-size: var(--font-size-hero);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

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

a {
  color: var(--color-amber);
  text-decoration: none;
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

a:hover {
  color: var(--color-amber-light);
  text-shadow: 0 0 8px var(--color-amber-dim);
}

a:focus {
  outline: 2px solid var(--color-amber);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Layout Containers
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* --------------------------------------------------------------------------
   Accessibility - Skip Link
   -------------------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-amber);
  color: var(--color-bg);
  z-index: 1001;
}

.skip-link:focus {
  top: var(--space-md);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */

.site-header {
  position: relative;
  z-index: 10;
}

.main-nav {
  display: flex;
  justify-content: center;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-amber-dim);
}

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

.nav-link {
  font-size: var(--font-size-sm);
  color: var(--color-amber);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-xs) var(--space-sm);
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-amber-light);
  text-shadow: 0 0 12px var(--color-amber-dim), 0 0 24px var(--color-amber-dim);
}

.nav-link:focus {
  outline: 2px solid var(--color-amber);
  outline-offset: 4px;
}

.nav-link[aria-current="page"] {
  color: var(--color-amber-light);
  border-bottom: 2px solid var(--color-amber);
}

/* --------------------------------------------------------------------------
   Main Content Area
   -------------------------------------------------------------------------- */

.main-content {
  position: relative;
  z-index: 1;
  min-height: calc(100vh - var(--nav-height) - 100px);
  padding: var(--space-xl) 0;
}

/* --------------------------------------------------------------------------
   Page Title with Typewriter Effect
   -------------------------------------------------------------------------- */

.page-title {
  font-size: var(--font-size-hero);
  color: var(--color-amber-light);
  margin-bottom: var(--space-xl);
  text-shadow: 0 0 20px var(--color-amber-dim);
}

.typewriter-title {
  display: inline-block;
}

.typewriter-title span {
  opacity: 0;
  transition: opacity 0.05s ease;
}

.typewriter-title.typing-complete span {
  opacity: 1;
}

.typewriter-cursor {
  display: inline-block;
  animation: blink 1s step-end infinite;
  color: var(--color-amber-light);
  margin-left: 2px;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* --------------------------------------------------------------------------
   Filter Bar
   -------------------------------------------------------------------------- */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.filter-btn {
  background: transparent;
  border: 1px solid var(--color-amber-dim);
  color: var(--color-amber);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
  min-width: 44px;
}

.filter-btn:hover {
  background: rgba(255, 153, 0, 0.1);
  border-color: var(--color-amber);
  text-shadow: 0 0 8px var(--color-amber-dim);
}

.filter-btn:focus {
  outline: 2px solid var(--color-amber);
  outline-offset: 2px;
}

.filter-btn.active {
  background: rgba(255, 153, 0, 0.15);
  border-color: var(--color-amber);
  color: var(--color-amber-light);
  box-shadow: 0 0 15px rgba(255, 153, 0, 0.2);
}

/* --------------------------------------------------------------------------
   Section Headings
   -------------------------------------------------------------------------- */

.section-heading {
  font-size: var(--font-size-lg);
  color: var(--color-amber-light);
  margin-bottom: var(--space-lg);
  font-weight: 400;
}

/* Note: "## " is already in HTML, no ::before needed */

.project-section {
  margin-bottom: var(--space-xl);
}

/* --------------------------------------------------------------------------
   Project Grid
   -------------------------------------------------------------------------- */

.project-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 768px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --------------------------------------------------------------------------
   Project Card
   -------------------------------------------------------------------------- */

.project-card {
  border: 1px solid var(--color-amber-dim);
  background: rgba(255, 153, 0, 0.03);
  padding: var(--space-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.project-card:hover {
  border-color: var(--color-amber);
  box-shadow: 0 0 20px rgba(255, 153, 0, 0.1);
}

.project-card:focus {
  outline: 2px solid var(--color-amber);
  outline-offset: 2px;
}

.project-card--featured {
  box-shadow: 0 0 30px rgba(255, 153, 0, 0.15);
  border-color: var(--color-amber);
}

.project-card--featured::before {
  content: '★ Featured';
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-amber-light);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Card Header */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-sm);
  gap: var(--space-sm);
}

.card-name {
  font-size: var(--font-size-lg);
  color: var(--color-amber-light);
  margin: 0;
  font-weight: 700;
}

.card-stats {
  display: flex;
  gap: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-amber-dim);
  flex-shrink: 0;
}

.stat-stars::before {
  content: '★ ';
}

.stat-forks::before {
  content: '⑂ ';
}

/* Card Content */
.card-tagline {
  font-size: var(--font-size-base);
  color: var(--color-amber);
  margin-bottom: var(--space-sm);
  opacity: 0.9;
}

.card-category {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--color-amber-dim);
  text-transform: lowercase;
}

/* Card Meta (language + category) */
.card-meta {
  display: flex;
  gap: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-amber-dim);
}

.card-language {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

/* Tags */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.tag {
  font-size: var(--font-size-sm);
  color: var(--color-amber-dim);
}

/* Expanded Content */
.card-expanded-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.project-card.expanded .card-expanded-content {
  max-height: 500px;
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-amber-dim);
}

.card-description {
  font-size: var(--font-size-base);
  color: var(--color-amber);
  margin-bottom: var(--space-md);
  opacity: 0.9;
}

.card-link {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-amber);
  word-break: break-all;
}

.card-link::before {
  content: '> git clone ';
  color: var(--color-amber-dim);
}

.card-link + .card-link {
  margin-top: var(--space-sm);
}

.card-link--demo::before {
  content: '> open ';
  color: var(--color-amber-dim);
}

/* Filtered out state */
.project-card.filtered-out {
  opacity: 0;
  transform: scale(0.95);
  pointer-events: none;
  position: absolute;
  visibility: hidden;
}

/* Loading skeleton */
.stat-loading {
  display: inline-block;
  width: 2em;
  height: 1em;
  background: linear-gradient(
    90deg,
    var(--color-amber-dim) 25%,
    rgba(255, 153, 0, 0.3) 50%,
    var(--color-amber-dim) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* --------------------------------------------------------------------------
   Empty State
   -------------------------------------------------------------------------- */

.empty-state {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-amber-dim);
  font-size: var(--font-size-lg);
}

.empty-state::before {
  content: '> ';
  color: var(--color-amber);
}

/* --------------------------------------------------------------------------
   Footer with GLaDOS Quote
   -------------------------------------------------------------------------- */

.site-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--color-amber-dim);
  margin-top: auto;
}

.glados-quote {
  font-style: italic;
  font-size: var(--font-size-sm);
  color: var(--color-amber-dim);
  opacity: 0;
  animation: fadeSlideUp 0.4s ease-out forwards;
  animation-delay: 0.5s;
  text-align: center;
  max-width: 30rem;
}

.glados-quote-text::before {
  content: '"';
}

.glados-quote-text::after {
  content: '"';
}

.glados-attribution {
  display: block;
  margin-top: var(--space-xs);
  font-style: normal;
  font-size: var(--font-size-sm);
  opacity: 0.6;
}

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   Toast Notification
   -------------------------------------------------------------------------- */

.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-amber);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-amber);
  z-index: 1001;
  opacity: 0;
  transition: transform 0.2s ease-out, opacity 0.2s ease-out;
}

.toast.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast-prefix {
  color: var(--color-amber-light);
  font-weight: 700;
}

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

/* --------------------------------------------------------------------------
   Reduced Motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .typewriter-title span,
  .glados-quote,
  .project-card,
  .card-expanded-content {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }

  .project-card.filtered-out {
    display: none;
  }

  .stat-loading {
    animation: none;
    background: var(--color-amber-dim);
  }
}

/* --------------------------------------------------------------------------
   Responsive - Mobile Breakpoint (max-width: 767px)
   -------------------------------------------------------------------------- */

@media (max-width: 767px) {
  :root {
    --font-size-hero: 1.75rem;
    --font-size-2xl: 1.5rem;
    --font-size-xl: 1.25rem;
    --space-xl: 2rem;
    --space-lg: 1rem;
  }

  .nav-list {
    gap: var(--space-md);
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-link {
    font-size: 0.75rem;
    padding: var(--space-sm);
  }

  .main-content {
    padding: var(--space-lg) 0;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .filter-bar {
    gap: var(--space-xs);
  }

  .filter-btn {
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
  }

  .card-header {
    flex-direction: column;
  }

  .card-stats {
    order: -1;
    margin-bottom: var(--space-xs);
  }
}

/* Extra small screens */
@media (max-width: 320px) {
  .nav-list {
    gap: var(--space-sm);
  }

  .nav-link {
    font-size: 0.65rem;
    letter-spacing: 0.05em;
  }
}