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

:root {
  --bg: #2e3440;
  --bg2: #3b4252;
  --bg3: #434c5e;
  --bg4: #4c566a;
  --accent: #88c0d0;
  --accent2: #81a1c1;
  --accent-dim: #88c0d022;
  --border: #4c566a;
  --border2: #4f5f76;
  --text: #ffffff;
  --text2: #88c0d0;
  --text3: #7b929e;
  --mono: 'Courier New', ui-monospace, 'Consolas', monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --red: #bf616a;
  --amber: #ebcb8b;
  --blue: #5e81ac;
}

html,
body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5
}

/* LAYOUT */
.app {
  display: grid;
  grid-template-rows: 48px 1fr;
  height: 100vh;
  overflow: hidden
}

.topbar {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 16px;
  flex-shrink: 0
}

.topbar-logo {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .1em;
  background: var(--accent-dim);
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--accent2)
}

.topbar-title {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text);
  font-weight: 400
}

.topbar-sub {
  font-size: 13px;
  color: var(--text3);
  margin-left: auto
}

.topbar-tabs {
  display: flex;
  gap: 2px;
  margin-left: 20px
}

.topbar-tab {
  font-family: var(--mono);
  font-size: 11px;
  padding: 5px 14px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text3);
  cursor: pointer;
  transition: all .15s
}

.topbar-tab:hover {
  color: var(--text);
  background: var(--bg3)
}

.topbar-tab.active {
  color: var(--accent);
  background: var(--accent-dim)
}

.main {
  display: flex;
  overflow: hidden
}

/* SIDEBAR */
.sidebar {
  width: 280px;
  flex-shrink: 0;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto
}

.sidebar-section {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border)
}

.sidebar-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text3);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 10px;
  opacity: .8
}

/* PALETTES */
.pal-controls {
  display: flex;
  gap: 6px;
  margin-bottom: 10px
}

.btn-sm {
  font-family: var(--mono);
  font-size: 10px;
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--border2);
  background: transparent;
  color: var(--text2);
  cursor: pointer;
  transition: all .12s
}

.btn-sm:hover {
  border-color: var(--accent);
  color: var(--accent)
}

.btn-sm.danger:hover {
  border-color: var(--red);
  color: var(--red)
}

.pal-count {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text3);
  margin-left: auto;
  align-self: center
}

.palette-row {
  margin-bottom: 8px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden
}

.palette-row-head {
  padding: 6px 10px;
  background: var(--bg4);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text3);
  letter-spacing: .06em
}

.palette-slots {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 2px;
  padding: 6px
}

.slot-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px
}

.slot-lbl {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--text3);
  text-align: center
}

.slot-btn {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 3px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .1s, border-color .1s;
  outline: none;
  min-width: 20px
}

.slot-btn:hover {
  transform: scale(1.12)
}

.slot-btn.active {
  border-color: #fff;
  box-shadow: 0 0 0 1px #ffffff44
}

/* COLOR EDITOR */
.color-editor {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border)
}

.ed-swatch {
  width: 100%;
  height: 48px;
  border-radius: 5px;
  border: 1px solid var(--border2);
  margin-bottom: 12px
}

.ed-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px
}

.ed-row label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text3);
  min-width: 40px
}

input[type=color] {
  width: 30px;
  height: 26px;
  border: 1px solid var(--border2);
  border-radius: 3px;
  cursor: pointer;
  padding: 1px 2px;
  background: transparent
}

input[type=text] {
  flex: 1;
  font-family: var(--mono);
  font-size: 12px;
  padding: 5px 8px;
  border: 1px solid var(--border2);
  border-radius: 4px;
  background: var(--bg3);
  color: var(--text);
  outline: none;
  transition: border-color .12s
}

input[type=text]:focus {
  border-color: var(--accent)
}

.bgr-box {
  background: var(--bg4);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 8px 10px;
  margin-bottom: 10px
}

.bgr-box-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text3);
  margin-bottom: 4px
}

.bgr-val {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--accent);
  font-weight: 700
}

.bgr-comps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin-top: 6px
}

.bgr-comp {
  background: var(--bg3);
  border-radius: 3px;
  padding: 4px;
  text-align: center
}

.bgr-comp-lbl {
  font-family: var(--mono);
  font-size: 8px;
  color: var(--text3)
}

.bgr-comp-val {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text)
}

.apply-btn {
  width: 100%;
  padding: 7px;
  background: var(--accent-dim);
  border: 1px solid var(--accent2);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  cursor: pointer;
  transition: all .12s
}

.apply-btn:hover {
  background: var(--accent2);
  color: #000
}

/* CFG SETTINGS */
.cfg-form {
  padding: 8px 14px
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-bottom: 8px
}

.field-group label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text3)
}

.field-group input,
.field-group select {
  font-family: var(--mono);
  font-size: 11px;
  padding: 5px 8px;
  border: 1px solid var(--border2);
  border-radius: 4px;
  background: var(--bg3);
  color: var(--text);
  outline: none
}

.field-group input:focus,
.field-group select:focus {
  border-color: var(--accent)
}

.cfg-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px
}

.section-sep {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent2);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin: 14px 0 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border2)
}

/* MAIN CONTENT */
.content {
  flex: 1;
  overflow: hidden;
  display: block;
  position: relative
}

.pane {
  display: none;
  width: 100%;
  height: 100%;
  overflow: auto;
  padding: 20px;
  box-sizing: border-box
}

.pane.active {
  display: block
}

#pane-preview.active {
  display: flex !important;
  overflow: hidden !important;
  padding: 0 !important;
  box-sizing: border-box
}

.cfg-right-panel {
  width: 320px;
  flex-shrink: 0;
  background: var(--bg2);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  display: flex;
  flex-direction: column
}

/* GBA SCREEN PREVIEW */
.preview-wrap {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  flex-wrap: wrap
}

.gba-device {
  background: #1f2024;
  border-radius: 12px;
  padding: 20px;
  border: 2px solid #2e3035;
  position: relative;
  flex-shrink: 0
}

.gba-device::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 3px;
  background: #2e3035;
  border-radius: 2px
}

.gba-screen-bezel {
  background: #1f2024;
  border-radius: 4px;
  padding: 8px;
  border: 2px solid #2e3035
}

.gba-canvas {
  position: relative;
  width: 480px;
  height: 320px;
  overflow: hidden;
  display: block
}

canvas#overlayCanvas {
  position: absolute;
  top: 0;
  left: 0;
  image-rendering: pixelated;
  image-rendering: crisp-edges
}

.preview-info {
  padding: 16px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text2);
  line-height: 1.8
}

.preview-info h3 {
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: .04em
}

.preview-info .pi-row {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 4px
}

.preview-info .pi-swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
  border: 1px solid var(--border2)
}

.preview-info .pi-text {
  font-size: 12px;
  color: var(--text3)
}

/* EXPORT */
.export-area {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0
}

.cfg-textarea {
  width: 100%;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  resize: vertical;
  outline: none;
  line-height: 1.8
}

.cfg-textarea:focus {
  border-color: var(--accent2)
}

.export-btns {
  display: flex;
  gap: 10px;
  margin-top: 12px
}

.export-btn {
  flex: 1;
  padding: 10px;
  border-radius: 5px;
  font-family: var(--mono);
  font-size: 12px;
  cursor: pointer;
  border: 1px solid var(--border2);
  background: var(--bg3);
  color: var(--text2);
  transition: all .12s
}

.export-btn:hover {
  border-color: var(--text2)
}

.export-btn.primary {
  background: var(--accent-dim);
  border-color: var(--accent2);
  color: var(--accent)
}

.export-btn.primary:hover {
  background: var(--accent2);
  color: #000
}

.export-note {
  font-size: 11px;
  color: var(--text3);
  margin-top: 8px;
  font-family: var(--mono)
}

/* SCROLLBAR */
::-webkit-scrollbar {
  width: 4px;
  height: 4px
}

::-webkit-scrollbar-track {
  background: var(--bg2)
}

::-webkit-scrollbar-thumb {
  background: var(--border2);
  border-radius: 2px
}



select {
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border2);
  border-radius: 4px;
  padding: 4px 6px;
  font-family: var(--mono);
  font-size: 11px;
  outline: none
}

canvas#menuCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 480px;
  height: 320px;
  image-rendering: pixelated;
  image-rendering: crisp-edges
}

/* latin-ext */
/* @font-face {
  font-family: 'Press Start 2P';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(https://fonts.gstatic.com/s/pressstart2p/v16/e3t4euO8T-267oIAQAu6jDQyK3nbivN04w.woff2) format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
} */

/* latin */
@font-face {
  font-family: 'NES';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(https://fonts.gstatic.com/s/pressstart2p/v16/e3t4euO8T-267oIAQAu6jDQyK3nVivM.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Cfg right panel -- single column layout to fit 300px width */
.cfg-form .cfg-grid {
  grid-template-columns: 1fr
}

.cfg-form .cfg-grid [style*="grid-column:1/-1"] {
  grid-column: 1
}

/* -- Responsive preview scaling ---------------------------------------------
   Screens + info grid are wrapped in #preview-content and zoom together,
   keeping proportions consistent across viewport sizes.

   Breakpoints target effective CSS widths:
     >2100px  = 1440p (2560px) or 1080p@100% full-screen -> no zoom
     \002264 2100px  = 1080p@100% (1920px) -> 0.88 zoom
     \002264 1700px  = 1080p@110% (1745px) -> 0.82 zoom
     \002264 1550px  = 1080p@125% (1536px) -> 0.72 zoom
     \002264 1300px  = smaller/windowed    -> 0.60 zoom

   zoom affects both visual size AND layout size (Chrome/Edge/Safari).
   Firefox: falls back to overflow-x:auto on #screens-wrap (already set). */

@media (max-width: 2100px) {
  #preview-content {
    zoom: 0.88;
  }
}

@media (max-width: 1700px) {
  #preview-content {
    zoom: 0.82;
  }
}

@media (max-width: 1550px) {
  #preview-content {
    zoom: 0.72;
  }
}

@media (max-width: 1300px) {
  #preview-content {
    zoom: 0.60;
  }
}