@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Orbitron:wght@400;700;900&display=swap');

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

:root {
  --bg:        #0d0f0a;
  --panel:     #111409;
  --panel2:    #181c0e;
  --border:    #2a3318;
  --border2:   #3d4f22;
  --glow:      #7fff00;        /* chartreuse — classic CRT phosphor green */
  --glow-dim:  #4a9400;
  --amber:     #ffb000;        /* amber accent — old monitor warmth */
  --amber-dim: #7a5200;
  --cyan:      #00e5cc;        /* retro cyan for highlights */
  --red:       #ff3c2a;
  --text:      #b8cc88;        /* aged phosphor */
  --dim:       #4a5c30;
  --mono:      'Share Tech Mono', monospace;
  --title:     'Orbitron', sans-serif;

  /* bevel colors */
  --bevel-light: #3a4a20;
  --bevel-dark:  #080a05;
}

/* ─── CRT scanline overlay ─── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.18) 2px,
    rgba(0,0,0,0.18) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  /* subtle vignette on the whole app */
  box-shadow: inset 0 0 120px rgba(0,0,0,0.7);
}

/* ─── HEADER ─── */
header {
  padding: 0 20px;
  height: 46px;
  border-bottom: 2px solid var(--border2);
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(180deg, #1a2010 0%, var(--panel) 100%);
  flex-shrink: 0;
  position: relative;
}

header::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0; right: 0;
  height: 2px;
  background: var(--border);
}

header h1 {
  font-family: var(--title);
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: 0.18em;
  color: var(--glow);
  text-shadow: 0 0 10px var(--glow), 0 0 24px rgba(127,255,0,0.3);
}

header .tagline {
  font-size: 0.58rem;
  color: var(--amber-dim);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border-left: 1px solid var(--border2);
  padding-left: 14px;
}

header .ver {
  margin-left: auto;
  font-size: 0.55rem;
  color: var(--dim);
  letter-spacing: 0.1em;
}

/* ─── UPLOAD ZONE ─── */
.upload-zone {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 10;
  background: var(--bg);
  transition: opacity 0.3s ease;
}

.upload-zone.hidden { opacity: 0; pointer-events: none; }

.drop-box {
  border: 2px dashed var(--border2);
  padding: 56px 80px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  background: var(--panel);
  /* inset bevel */
  box-shadow:
    inset 2px 2px 0 var(--bevel-dark),
    inset -2px -2px 0 var(--bevel-light);
}

.drop-box::before {
  content: '';
  position: absolute;
  inset: 6px;
  border: 1px solid var(--border);
  pointer-events: none;
}

.drop-box:hover, .drop-box.dragover {
  border-color: var(--glow);
  background: #141a08;
  box-shadow:
    inset 2px 2px 0 var(--bevel-dark),
    inset -2px -2px 0 var(--bevel-light),
    0 0 20px rgba(127,255,0,0.08);
}

.drop-box .icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
  display: block;
  color: var(--glow-dim);
  text-shadow: 0 0 12px var(--glow-dim);
}

.drop-box p {
  font-size: 0.72rem;
  color: var(--dim);
  line-height: 2;
  letter-spacing: 0.05em;
}

.drop-box strong {
  color: var(--amber);
  font-weight: 400;
  text-shadow: 0 0 8px rgba(255,176,0,0.4);
}

#fileInput { display: none; }

/* ─── LAYOUT ─── */
.main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ─── SIDEBAR ─── */
.sidebar {
  width: 256px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 2px solid var(--border2);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  box-shadow: 3px 0 12px rgba(0,0,0,0.5);
}

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

.section-label {
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 12px;
  text-shadow: 0 0 8px rgba(255,176,0,0.4);
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-label::before {
  content: '▶';
  font-size: 0.45rem;
  color: var(--glow-dim);
}

/* ─── SLIDERS ─── */
.slider-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.slider-row {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-header label {
  font-size: 0.65rem;
  color: var(--text);
  letter-spacing: 0.06em;
}

.slider-header .val {
  font-size: 0.65rem;
  color: var(--glow);
  min-width: 36px;
  text-align: right;
  text-shadow: 0 0 6px rgba(127,255,0,0.5);
}

input[type=range] {
  -webkit-appearance: none;
  width: 100%;
  height: 3px;
  background: var(--border2);
  outline: none;
  cursor: pointer;
  border-top: 1px solid var(--bevel-dark);
  border-bottom: 1px solid var(--bevel-light);
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 10px;
  height: 14px;
  background: linear-gradient(180deg, #c8e870 0%, #6aac00 100%);
  cursor: pointer;
  border-radius: 0;
  border-top: 1px solid #e0ff80;
  border-left: 1px solid #b0d840;
  border-right: 1px solid #3a6400;
  border-bottom: 1px solid #2a4a00;
  box-shadow: 0 0 6px rgba(127,255,0,0.5);
}

input[type=range].red::-webkit-slider-thumb {
  background: linear-gradient(180deg, #ff8070 0%, #cc2010 100%);
  border-top: 1px solid #ffb0a0;
  border-left: 1px solid #ee5040;
  border-right: 1px solid #880800;
  border-bottom: 1px solid #660000;
  box-shadow: 0 0 6px rgba(255,60,42,0.5);
}

input[type=range].green::-webkit-slider-thumb {
  background: linear-gradient(180deg, #80ffb0 0%, #10cc50 100%);
  border-top: 1px solid #b0ffe0;
  border-left: 1px solid #40ee80;
  border-right: 1px solid #008830;
  border-bottom: 1px solid #006020;
  box-shadow: 0 0 6px rgba(0,229,100,0.5);
}

input[type=range].blue::-webkit-slider-thumb {
  background: linear-gradient(180deg, #80c8ff 0%, #1060cc 100%);
  border-top: 1px solid #b0e0ff;
  border-left: 1px solid #4090ee;
  border-right: 1px solid #003888;
  border-bottom: 1px solid #002060;
  box-shadow: 0 0 6px rgba(0,229,204,0.5);
}

/* ─── BUTTONS ─── */
.btn-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--mono);
  font-size: 0.6rem;
  padding: 6px 10px;
  border: 1px solid var(--border2);
  background: linear-gradient(180deg, var(--panel2) 0%, var(--panel) 100%);
  color: var(--text);
  cursor: pointer;
  letter-spacing: 0.08em;
  transition: all 0.1s;
  text-transform: uppercase;
  /* outset bevel — classic Win2k button */
  box-shadow:
    1px 1px 0 var(--bevel-light),
    -1px -1px 0 var(--bevel-dark),
    inset 1px 1px 0 rgba(255,255,255,0.04);
}

.btn:hover {
  color: var(--glow);
  border-color: var(--glow-dim);
  background: linear-gradient(180deg, #1c2410 0%, #141a08 100%);
  text-shadow: 0 0 8px rgba(127,255,0,0.5);
}

.btn:active {
  /* pressed bevel */
  box-shadow:
    -1px -1px 0 var(--bevel-light),
    1px 1px 0 var(--bevel-dark),
    inset 1px 1px 0 rgba(0,0,0,0.3);
  transform: translate(1px, 1px);
}

.btn.active {
  background: linear-gradient(180deg, #2a3c10 0%, #1a2808 100%);
  color: var(--glow);
  border-color: var(--glow-dim);
  box-shadow:
    -1px -1px 0 var(--bevel-light),
    1px 1px 0 var(--bevel-dark),
    inset 0 0 8px rgba(127,255,0,0.15);
  text-shadow: 0 0 8px rgba(127,255,0,0.6);
}

.btn.danger:hover {
  border-color: var(--red);
  color: var(--red);
  background: linear-gradient(180deg, #1c0a08 0%, #120504 100%);
  text-shadow: 0 0 8px rgba(255,60,42,0.5);
}

.btn.dl {
  width: 100%;
  text-align: center;
  padding: 9px;
  border-color: var(--amber-dim);
  color: var(--amber);
  margin-top: 6px;
  letter-spacing: 0.12em;
  text-shadow: 0 0 8px rgba(255,176,0,0.4);
}

.btn.dl:hover {
  border-color: var(--amber);
  background: linear-gradient(180deg, #201408 0%, #150d04 100%);
  box-shadow:
    1px 1px 0 var(--bevel-light),
    -1px -1px 0 var(--bevel-dark),
    0 0 12px rgba(255,176,0,0.12);
}

/* ─── PIXEL INFO ─── */
.pixel-info {
  padding: 12px 14px;
  font-size: 0.62rem;
  color: var(--dim);
  line-height: 2;
  flex: 1;
}

.pixel-info .swatch {
  width: 100%;
  height: 28px;
  margin-bottom: 8px;
  border: 1px solid var(--border2);
  box-shadow:
    inset 1px 1px 0 var(--bevel-dark),
    inset -1px -1px 0 var(--bevel-light);
  transition: background 0.15s;
}

.pixel-info span { color: var(--glow-dim); }

/* ─── CANVAS AREA ─── */
.canvas-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  background:
    radial-gradient(ellipse at 50% 50%, #111a08 0%, #080b04 70%, #040604 100%);
}

/* dot-matrix grid */
.canvas-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(127,255,0,0.07) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}

#mainCanvas {
  max-width: 100%;
  max-height: 100%;
  image-rendering: pixelated;
  cursor: crosshair;
  box-shadow:
    0 0 0 1px var(--border2),
    0 0 0 3px var(--panel),
    0 0 0 4px var(--border),
    0 0 40px rgba(0,0,0,0.9),
    0 0 80px rgba(127,255,0,0.04);
  transition: box-shadow 0.2s;
}

#mainCanvas:hover {
  box-shadow:
    0 0 0 1px var(--glow-dim),
    0 0 0 3px var(--panel),
    0 0 0 4px var(--border2),
    0 0 40px rgba(0,0,0,0.9),
    0 0 60px rgba(127,255,0,0.08);
}

/* ─── ZOOM CONTROLS ─── */
.zoom-controls {
  position: absolute;
  bottom: 14px;
  right: 14px;
  display: flex;
  gap: 4px;
}

.zoom-btn {
  font-family: var(--mono);
  font-size: 0.72rem;
  width: 28px;
  height: 28px;
  border: 1px solid var(--border2);
  background: linear-gradient(180deg, var(--panel2) 0%, var(--panel) 100%);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.1s;
  box-shadow:
    1px 1px 0 var(--bevel-light),
    -1px -1px 0 var(--bevel-dark);
}

.zoom-btn:hover {
  border-color: var(--glow-dim);
  color: var(--glow);
  text-shadow: 0 0 8px rgba(127,255,0,0.5);
}

.zoom-btn:active {
  box-shadow:
    -1px -1px 0 var(--bevel-light),
    1px 1px 0 var(--bevel-dark);
  transform: translate(1px, 1px);
}

/* ─── COORDS ─── */
.coords {
  position: absolute;
  bottom: 14px;
  left: 14px;
  font-size: 0.58rem;
  color: var(--glow-dim);
  letter-spacing: 0.1em;
  background: var(--panel);
  border: 1px solid var(--border2);
  padding: 4px 10px;
  box-shadow:
    1px 1px 0 var(--bevel-light),
    -1px -1px 0 var(--bevel-dark);
  text-shadow: 0 0 6px rgba(127,255,0,0.3);
}

/* ─── HIDDEN CANVASES ─── */
#sourceCanvas, #tempCanvas { display: none; }

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: var(--border2);
  border-left: 1px solid var(--bevel-light);
}
::-webkit-scrollbar-thumb:hover { background: var(--glow-dim); }