:root {
  /* Background & UI - yellows and greens */
  --mk-sky: #e8e080;
  --mk-grass-light: #90d830;
  --mk-grass-mid: #68b810;
  --mk-grass-dark: #50a010;
  --mk-ground: #409008;
  --black: #181810;
  --white: #f8f8d8;
  --container-bg: #0368a4;
  --container-bg-darker: #0c1733;

  /* Wood tones (fretboard) */
  --wood-light: #f8c888;
  --wood-mid: #e8a040;
  --wood-dark: #267b15;
  --wood-shadow: #462f12;

  /* Metallics (frets, strings) */
  --metal-light: #e8e8d0;
  --metal-mid: #b8b8a0;
  --metal-dark: #d2d208;

  /* Accent colors - palette */
  --mk-yellow: #f8d800;
  --mk-orange: #f89020;
  --mk-red: #f82800;
  --mk-green: #00c840;
  --mk-cyan: #2fe8f6;
  --mk-blue: #3080f8;
  --mk-purple: #9858f8;

  /* UI block colors */
  --block-tan: #f8d890;
  --block-brown: #c89040;
  --mk-highlight: #f8f890;

  /* Gradients */
  --gradient-body: linear-gradient(344deg, rgba(2, 0, 36, 1) 0%, rgba(9, 9, 121, 1) 35%, rgba(0, 212, 255, 1) 100%);
}

/* ============================================
   8-BIT STRIPED GRADIENT PATTERN (Shared)
   ============================================
   This pattern is used for scroll fade effects.
   Replace BASE_COLOR with the target color.

   linear-gradient(DIRECTION,
     BASE_COLOR 0%,
     BASE_COLOR 10%,
     rgba(..., 0.9) 10% 20%,
     rgba(..., 0.75) 20% 30%,
     rgba(..., 0.6) 30% 40%,
     rgba(..., 0.45) 40% 50%,
     rgba(..., 0.3) 50% 60%,
     rgba(..., 0.15) 60% 70%,
     transparent 70%
   )
   ============================================ */

/* ============================================
   BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

@font-face {
  font-family: 'PixelFont';
  src: url('https://fonts.gstatic.com/s/pressstart2p/v15/e3t4euO8T-267oIAQAu6jDQyK3nVivM.woff2') format('woff2');
}

body {
  background: var(--gradient-body);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  padding-top: 40px;
  font-family: 'Press Start 2P', monospace;
  image-rendering: pixelated;
  width: 100%;
  margin: 0;
}

/* Scanline overlay for CRT feel */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(0deg,
      rgba(0, 0, 0, 0.1) 0px,
      rgba(0, 0, 0, 0.1) 1px,
      transparent 1px,
      transparent 3px);
  pointer-events: none;
  z-index: 1000;
}

/* ============================================
   GAME CONTAINER (scaled viewport)
   ============================================ */
#game-container {
  border-radius: 8px;
  padding: 0;
  position: relative;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  width: 100%;
  max-width: 100%;
  display: flex;
  align-items: center;
  justify-content: safe center;
}

/* WebKit scrollbar styling (Chrome, Safari, Edge) */
#game-container::-webkit-scrollbar {
  height: 24px;
}

#game-container::-webkit-scrollbar-track {
  background: var(--container-bg-darker);
  border-radius: 4px;
  margin: 8px 12px;
}

#game-container::-webkit-scrollbar-thumb {
  background: var(--mk-yellow);
  border-radius: 4px;
  border: 4px solid var(--mk-sky);
}

#title-container {
  width: 100%;
  max-width: 1170px;
  margin: 0 auto 8px auto;
  display: flex;
  justify-content: center;
}

#game-title {
  display: block;
  max-width: 125px;
  height: auto;
  image-rendering: pixelated;
}

#fretboard-wrapper {
  border-top: 4px solid var(--mk-yellow);
  border-bottom: 4px solid var(--mk-cyan);
  border-left: none;
  border-right: none;
  background: var(--wood-shadow);
  width: 100%;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding-bottom: 64px;
  margin-top: 24px;
  position: relative;
  box-shadow: 10px 10px 20px rgba(0,0,0,0.5);
  --fade-left-opacity: 0;
  --fade-right-opacity: 0;
}

/* Fade to wood-shadow at left of game container - 8-bit striped style */
#fretboard-wrapper::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 40px;
  background: linear-gradient(to right,
      var(--wood-shadow) 0%,
      var(--wood-shadow) 10%,
      rgba(70, 47, 18, 0.9) 10%,
      rgba(70, 47, 18, 0.9) 20%,
      rgba(70, 47, 18, 0.75) 20%,
      rgba(70, 47, 18, 0.75) 30%,
      rgba(70, 47, 18, 0.6) 30%,
      rgba(70, 47, 18, 0.6) 40%,
      rgba(70, 47, 18, 0.45) 40%,
      rgba(70, 47, 18, 0.45) 50%,
      rgba(70, 47, 18, 0.3) 50%,
      rgba(70, 47, 18, 0.3) 60%,
      rgba(70, 47, 18, 0.15) 60%,
      rgba(70, 47, 18, 0.15) 70%,
      transparent 70%);
  pointer-events: none;
  z-index: 10;
  opacity: var(--fade-left-opacity);
  transition: opacity 0.2s ease;
}

/* Fade to wood-shadow at right of game container - 8-bit striped style */
#fretboard-wrapper::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 40px;
  background: linear-gradient(to left,
      var(--wood-shadow) 0%,
      var(--wood-shadow) 10%,
      rgba(70, 47, 18, 0.9) 10%,
      rgba(70, 47, 18, 0.9) 20%,
      rgba(70, 47, 18, 0.75) 20%,
      rgba(70, 47, 18, 0.75) 30%,
      rgba(70, 47, 18, 0.6) 30%,
      rgba(70, 47, 18, 0.6) 40%,
      rgba(70, 47, 18, 0.45) 40%,
      rgba(70, 47, 18, 0.45) 50%,
      rgba(70, 47, 18, 0.3) 50%,
      rgba(70, 47, 18, 0.3) 60%,
      rgba(70, 47, 18, 0.15) 60%,
      rgba(70, 47, 18, 0.15) 70%,
      transparent 70%);
  pointer-events: none;
  z-index: 10;
  opacity: var(--fade-right-opacity);
  transition: opacity 0.2s ease;
}

/* ============================================
   UI CONTROLS
   ============================================ */
/* ============================================
   INFO DISPLAY
   ============================================ */
.info-bar {
  margin: 24px auto -50px;
  font-family: 'Press Start 2P', monospace;
  font-size: 14px;
  color: var(--white);
  text-shadow: 3px 3px 0 var(--black);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 20px 40px;
  border-radius: 8px;
  border: 4px solid var(--mk-yellow);
  box-shadow:
    inset -2px -2px 0 var(--mk-orange),
    inset 2px 2px 0 var(--mk-highlight),
    0 6px 16px rgba(0, 0, 0, 0.5);
  width: 100%;
  max-width: 1170px;
  box-sizing: border-box;
  position: relative;
  background-color: var(--container-bg-darker);
  image-rendering: pixelated;
  align-self: center;
  z-index: 100;
}

/* Fretboard info bar uses 3 columns since PLAYED is hidden */
#fretboard-info-bar {
  grid-template-columns: repeat(3, 1fr);
}

/* Hide "Played" in desktop mode for fretboard info bar only */
#fretboard-info-bar .info-item:nth-child(3) {
  display: none;
}

.info-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.info-label {
  color: var(--mk-yellow);
  white-space: nowrap;
  font-weight: bold;
  font-size: 12px;
  letter-spacing: 2px;
}

.info-item span:not(.info-label) {
  color: var(--mk-cyan);
  font-size: 18px;
  white-space: nowrap;
  min-height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 200px;
}

/* ============================================
   CHIP SELECTION SYSTEM
   ============================================ */

/* Divider between Tuning and Instrument */
#divider-row {
  width: 2px;
  min-width: 2px;
  padding: 0;
  align-self: stretch;
  margin-left: 5px;
  margin-right: 5px;
  background-color: #232d4a;
}

/* Stacked Controls Section (Tuning, Sound, Instrument, Display) */
.stacked-controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
  max-width: 50%;
  align-items: flex-start;
}

.stacked-controls-label {
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  color: var(--mk-yellow);
  text-shadow: 2px 2px 0 var(--black);
  text-transform: uppercase;
  letter-spacing: 1px;
  text-align: left;
  margin-bottom: 8px;
}

.control-title {
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  color: var(--metal-mid);
  text-shadow: 1px 1px 0 var(--black);
  text-transform: uppercase;
  letter-spacing: 1px;
  text-align: left;
}

.chip-group-horizontal {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-start;
}

.chip-group-horizontal .chip {
  width: auto;
  flex: 0 0 auto;
}

.chip-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 150px;
  position: relative;
  --fade-top-opacity: 0;
  --fade-bottom-opacity: 0;
}

/* Fade to blue at top of chip group - 8-bit striped style */
.chip-row::before {
  content: '';
  position: absolute;
  top: 26px;
  left: 0;
  right: 0;
  height: 40px;
  background: linear-gradient(to bottom,
      var(--container-bg-darker) 0%,
      var(--container-bg-darker) 10%,
      rgba(12, 23, 51, 0.9) 10%,
      rgba(12, 23, 51, 0.9) 20%,
      rgba(12, 23, 51, 0.75) 20%,
      rgba(12, 23, 51, 0.75) 30%,
      rgba(12, 23, 51, 0.6) 30%,
      rgba(12, 23, 51, 0.6) 40%,
      rgba(12, 23, 51, 0.45) 40%,
      rgba(12, 23, 51, 0.45) 50%,
      rgba(12, 23, 51, 0.3) 50%,
      rgba(12, 23, 51, 0.3) 60%,
      rgba(12, 23, 51, 0.15) 60%,
      rgba(12, 23, 51, 0.15) 70%,
      transparent 70%);
  pointer-events: none;
  z-index: 10;
  opacity: var(--fade-top-opacity);
  transition: opacity 0.2s ease;
}

/* Fade to blue at bottom of chip group - 8-bit striped style */
.chip-row::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40px;
  background: linear-gradient(to top,
      var(--container-bg-darker) 0%,
      var(--container-bg-darker) 10%,
      rgba(12, 23, 51, 0.9) 10%,
      rgba(12, 23, 51, 0.9) 20%,
      rgba(12, 23, 51, 0.75) 20%,
      rgba(12, 23, 51, 0.75) 30%,
      rgba(12, 23, 51, 0.6) 30%,
      rgba(12, 23, 51, 0.6) 40%,
      rgba(12, 23, 51, 0.45) 40%,
      rgba(12, 23, 51, 0.45) 50%,
      rgba(12, 23, 51, 0.3) 50%,
      rgba(12, 23, 51, 0.3) 60%,
      rgba(12, 23, 51, 0.15) 60%,
      rgba(12, 23, 51, 0.15) 70%,
      transparent 70%);
  pointer-events: none;
  z-index: 10;
  opacity: var(--fade-bottom-opacity);
  transition: opacity 0.2s ease;
}

.chip-row-label {
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  color: var(--mk-yellow);
  text-shadow: 2px 2px 0 var(--black);
  text-transform: uppercase;
  letter-spacing: 1px;
  text-align: center;
  margin-bottom: 8px;
}

.chip-group {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  width: 100%;
  max-height: 300px;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 4px;
}

/* Scrollbar styling for chip groups */
.chip-group::-webkit-scrollbar {
  width: 8px;
}

.chip-group::-webkit-scrollbar-track {
  background: var(--container-bg-darker);
  border-radius: 4px;
}

.chip-group::-webkit-scrollbar-thumb {
  background: var(--mk-yellow);
  border-radius: 4px;
  border: 2px solid var(--container-bg-darker);
}

.chip-group::-webkit-scrollbar-thumb:hover {
  background: var(--mk-orange);
}

.chip {
  font-family: 'Press Start 2P', monospace;
  font-size: 8px;
  padding: 10px 16px;
  background: var(--metal-mid);
  border: 3px solid var(--black);
  border-radius: 4px;
  color: var(--black);
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.1s ease;
  box-shadow:
    inset -2px -2px 0 var(--metal-dark),
    inset 2px 2px 0 var(--metal-light);
  user-select: none;
  -webkit-user-select: none;
  width: 100%;
  text-align: center;
}

.chip:hover {
  background: var(--mk-highlight);
  box-shadow:
    inset -2px -2px 0 var(--mk-yellow),
    inset 2px 2px 0 var(--white);
}

.chip.selected {
  background: var(--mk-yellow);
  box-shadow:
    inset 2px 2px 0 var(--mk-orange),
    inset -2px -2px 0 var(--mk-highlight);
  transform: translateY(1px);
}

.chip.selected:hover {
  background: var(--mk-yellow);
}

/* Sharp/flat notes - slightly different styling */
.chip.accidental {
  background: var(--wood-mid);
  box-shadow:
    inset -2px -2px 0 var(--wood-dark),
    inset 2px 2px 0 var(--wood-light);
}

.chip.accidental:hover {
  background: var(--mk-orange);
}

.chip.accidental.selected {
  background: var(--mk-yellow);
  box-shadow:
    inset 2px 2px 0 var(--mk-orange),
    inset -2px -2px 0 var(--mk-highlight);
  transform: translateY(1px);
}

/* ============================================
   MOBILE STYLES
   ============================================ */
@media (max-width: 768px) {
  body {
    padding-top: 20px;
  }

  #game-container {
    border-radius: 0;
    width: 100%;
    max-width: none;
  }

  #fretboard-wrapper {
    margin-top: 12px;
    border-top-width: 3px;
    border-bottom-width: 3px;
    margin-left: 0;
    margin-right: 0;
    width: 100vw;
  }

  /* Adjust right shadow position for mobile to prevent cutoff */
  #fretboard-wrapper::after {
    right: 0px;
  }

  #fretboard-canvas {
    display: block;
    image-rendering: pixelated;
    image-rendering: crisp-edges;
    border-radius: 0;
    touch-action: pan-x pan-y;
    user-select: none;
    -webkit-user-select: none;
    flex-shrink: 0;
    flex-grow: 0;
  }


  .info-bar {
    align-self: center;
  }

  #controls {
    align-self: center;
  }

  #tabbed-controls {
    align-self: center;
  }

  .info-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    width: calc(100% - 24px);
    max-width: 100%;
    padding: 16px;
    margin-bottom: -40px;
    z-index: 100;
  }

  /* Fretboard info bar: 2 columns on mobile */
  #fretboard-info-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Hide Selected and Last Played in mobile for fretboard */
  #fretboard-info-bar .info-item:nth-child(1),
  #fretboard-info-bar .info-item:nth-child(2) {
    display: none;
  }

  /* Show Played in mobile for fretboard (override desktop hide) */
  #fretboard-info-bar .info-item:nth-child(3) {
    display: flex;
  }

  /* Show only current/next chord in mobile for jam */
  #jam-info-bar .info-item:nth-child(3),
  #jam-info-bar .info-item:nth-child(4) {
    display: none;
  }

  .info-item span:not(.info-label) {
    font-size: 11px;
    min-width: auto;
  }

  .info-label {
    font-size: 10px;
  }

  /* Chip controls mobile */
  .chip-row {
    align-items: flex-start;
    padding-bottom: 0;
    flex-direction: column;
  }

  #root-row,
  #scale-row,
  #chord-row {
    flex: 1 1 0;
    min-width: 0;
    max-width: calc(33.333% - 8px);
  }

  #divider-row {
    display: none;
  }

  .chip-row-label {
    margin-bottom: 4px;
    text-align: left;
  }

  /* Keep root, scale, chord in columns */
  #root-chips,
  #scale-chips,
  #chord-chips {
    flex-direction: column;
    max-height: 200px;
    overflow-y: auto;
    padding-right: 8px;
    gap: 4px;
  }

  #root-chips .chip,
  #scale-chips .chip,
  #chord-chips .chip {
    width: 100%;
    text-align: center;
  }

  /* Enable gradients for root, scale, chord in mobile */
  #root-row::before,
  #root-row::after,
  #scale-row::before,
  #scale-row::after,
  #chord-row::before,
  #chord-row::after {
    display: block;
  }

  /* Adjust top gradient position for mobile */
  #root-row::before,
  #scale-row::before,
  #chord-row::before {
    top: 18px;
  }

  /* Add margin below root/scale/chord group */
  #chord-row {
    margin-bottom: 16px;
  }

  /* Display, tuning, sound, instrument in rows */
  .chip-group-horizontal {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
  }

  .chip-group-horizontal .chip {
    width: auto;
    flex: 0 0 auto;
  }

  .stacked-controls {
    max-width: 100%;
    flex-basis: 100%;
  }

  .chip {
    font-size: 7px;
    padding: 12px 10px;
  }

  /* Footer mobile styles */
  #site-footer {
    padding: 32px 24px;
  }

  .footer-mission {
    font-size: 9px;
    line-height: 1.6;
    margin-bottom: 20px;
  }

  .footer-links {
    flex-direction: column;
    gap: 12px;
  }

  .footer-btn {
    font-size: 9px;
    padding: 14px 18px;
  }
}

/* ============================================
   FOOTER
   ============================================ */

#site-footer {
  padding: 48px 32px;
  margin-top: 32px;
  text-align: center;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.footer-mission {
  font-family: 'Press Start 2P', monospace;
  font-size: 11px;
  color: var(--white);
  text-shadow: 2px 2px 0 var(--black);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 660px;
  margin-left: auto;
  margin-right: auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-btn {
  font-family: 'Press Start 2P', monospace;
  font-size: 11px;
  padding: 16px 24px;
  background: var(--mk-green);
  border: 3px solid var(--black);
  border-radius: 4px;
  color: var(--black);
  text-decoration: none;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.1s ease;
  box-shadow:
    inset -2px -2px 0 var(--wood-dark),
    inset 2px 2px 0 var(--white);
  user-select: none;
  -webkit-user-select: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-btn:hover {
  background: var(--mk-yellow);
  transform: translateY(-2px);
  box-shadow:
    inset -2px -2px 0 var(--mk-orange),
    inset 2px 2px 0 var(--white),
    0 4px 0 var(--black);
}

.footer-btn:active {
  transform: translateY(1px);
  box-shadow:
    inset 2px 2px 0 var(--wood-dark),
    inset -2px -2px 0 var(--white);
}

.github-btn {
  background: var(--mk-blue);
}

.github-btn:hover {
  background: var(--mk-cyan);
}

.donate-btn {
  background: var(--mk-orange);
}

.donate-btn:hover {
  background: var(--mk-yellow);
}

.btn-icon {
  font-size: 14px;
  line-height: 1;
}

/* ============================================
   SEO & ACCESSIBILITY
   ============================================ */

/* Visually hidden but accessible to screen readers */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* SEO Content Section - Hidden from view but accessible to search engines */
.seo-content {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}