/* ============================================================
   ASCII CAMERA — styles
   Design: retro phosphor terminal. One display face (VT323) used
   sparingly for the logo and section numbers; JetBrains Mono
   carries everything else, including the ASCII output itself.
   ============================================================ */

:root{
  --font-display: 'VT323', monospace;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;

  --radius: 3px;
  --border-w: 1px;
  --transition: 120ms ease;

  --header-h: 64px;
  --footer-h: 34px;
  --sidebar-w: 320px;
}

/* ---------- Theme: TERMINAL (default) ---------- */
html[data-theme="terminal"]{
  --bg: #0b0e0b;
  --bg-raised: #10140f;
  --panel: #12160f;
  --border: #263323;
  --fg: #d9e8d2;
  --fg-dim: #8a9c83;
  --accent: #7cf27c;
  --accent-dim: #3f6b3f;
  --danger: #ff6b5e;
  --ascii-fg: #86f28c;
  --ascii-bg: #060907;
}

/* ---------- Theme: AMBER ---------- */
html[data-theme="amber"]{
  --bg: #150e04;
  --bg-raised: #1c1406;
  --panel: #1a1206;
  --border: #4a3410;
  --fg: #ffd699;
  --fg-dim: #b98d4c;
  --accent: #ffb64c;
  --accent-dim: #8a5e21;
  --danger: #ff6b5e;
  --ascii-fg: #ffb64c;
  --ascii-bg: #0e0802;
}

/* ---------- Theme: PAPER ---------- */
html[data-theme="paper"]{
  --bg: #e8e2d2;
  --bg-raised: #ded7c4;
  --panel: #e2dbc9;
  --border: #c3b99e;
  --fg: #21201a;
  --fg-dim: #6c6653;
  --accent: #14665c;
  --accent-dim: #a7c9c3;
  --danger: #a13a2a;
  --ascii-fg: #21201a;
  --ascii-bg: #f2ede0;
}

/* ---------- Theme: MATRIX ---------- */
html[data-theme="matrix"]{
  --bg: #030602;
  --bg-raised: #060c05;
  --panel: #050a04;
  --border: #163315;
  --fg: #b6ffb0;
  --fg-dim: #4c8a49;
  --accent: #00ff41;
  --accent-dim: #0d5c1f;
  --danger: #ff6b5e;
  --ascii-fg: #00ff41;
  --ascii-bg: #010401;
}

/* ---------- Theme: CUSTOM ---------- */
html[data-theme="custom"]{
  --bg: #0b0e0b;
  --bg-raised: #10140f;
  --panel: #12160f;
  --border: #263323;
  --fg: #d9e8d2;
  --fg-dim: #8a9c83;
  --accent: #7cf27c;
  --accent-dim: #3f6b3f;
  --danger: #ff6b5e;
}

/* ============================================================
   BASE
   ============================================================ */

*{
  box-sizing: border-box;
}

html,
body{
  height: 100%;
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

.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;
}

.hidden{
  display: none !important;
}

button,
input,
select{
  font-family: inherit;
  color: inherit;
}

:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ============================================================
   APP SHELL
   ============================================================ */

.app{
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* ============================================================
   HEADER
   ============================================================ */

.header{
  height: var(--header-h);
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: var(--border-w) solid var(--border);
  background: var(--panel);
}

.header-brand{
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.logo{
  font-family: var(--font-display);
  font-size: 30px;
  letter-spacing: 2px;
  margin: 0;
  color: var(--fg);
}

.logo-dim{
  color: var(--accent);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink{
  50%{
    opacity: 0;
  }
}

.subtitle{
  margin: 0;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--fg-dim);
  text-transform: uppercase;
}

.header-actions{
  display: flex;
  align-items: center;
  gap: 14px;
}

.field-inline{
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--fg-dim);
  cursor: pointer;
  user-select: none;
}

.field-inline input{
  accent-color: var(--accent);
}

/* ============================================================
   CONTROLS
   ============================================================ */

.btn{
  appearance: none;
  background: transparent;
  border: var(--border-w) solid var(--border);
  color: var(--fg);
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.5px;
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    background var(--transition),
    border-color var(--transition),
    color var(--transition),
    transform 60ms ease;
  white-space: nowrap;
}

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

.btn:active{
  transform: translateY(1px);
}

.btn:disabled{
  opacity: 0.4;
  cursor: not-allowed;
}

.btn:disabled:hover{
  border-color: var(--border);
  color: var(--fg);
}

.btn-primary{
  border-color: var(--accent);
  color: var(--bg);
  background: var(--accent);
}

.btn-primary:hover{
  filter: brightness(1.1);
  color: var(--bg);
}

.btn-ghost{
  border-color: transparent;
  color: var(--fg-dim);
}

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

.btn-sm{
  padding: 4px 8px;
  font-size: 11px;
}

.btn-block{
  width: 100%;
  margin-top: 10px;
}

.btn-icon{
  padding: 4px 10px;
  font-size: 14px;
  line-height: 1;
}

.select-wrap{
  position: relative;
  display: inline-block;
}

.select-wrap.full{
  display: block;
  width: 100%;
}

.select-wrap select{
  appearance: none;
  width: 100%;
  background: var(--bg-raised);
  border: var(--border-w) solid var(--border);
  color: var(--fg);
  padding: 7px 26px 7px 10px;
  border-radius: var(--radius);
  font-size: 12.5px;
  cursor: pointer;
}

.select-wrap::after{
  content: '\25BE';
  position: absolute;
  right: 9px;
  top: 50%;
  transform: translateY(-55%);
  pointer-events: none;
  color: var(--fg-dim);
  font-size: 10px;
}

.select-wrap select:hover{
  border-color: var(--accent);
}

input[type="text"],
input[type="number"]{
  width: 100%;
  background: var(--bg-raised);
  border: var(--border-w) solid var(--border);
  color: var(--fg);
  padding: 7px 10px;
  border-radius: var(--radius);
  font-size: 12.5px;
}

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

input[type="range"]{
  -webkit-appearance: none;
  width: 100%;
  height: 3px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb{
  -webkit-appearance: none;
  width: 13px;
  height: 13px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 1px var(--accent);
}

input[type="range"]::-moz-range-thumb{
  width: 11px;
  height: 11px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid var(--bg);
}

input[type="color"]{
  -webkit-appearance: none;
  width: 34px;
  height: 26px;
  padding: 0;
  border: var(--border-w) solid var(--border);
  border-radius: var(--radius);
  background: none;
  cursor: pointer;
}

input[type="color"]::-webkit-color-swatch-wrapper{
  padding: 2px;
}

input[type="color"]::-webkit-color-swatch{
  border: none;
  border-radius: 1px;
}

.checkbox-field{
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  cursor: pointer;
  user-select: none;
}

.checkbox-field input{
  accent-color: var(--accent);
}

.color-field{
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--fg-dim);
  letter-spacing: 1px;
}

/* ============================================================
   WORKSPACE
   ============================================================ */

.workspace{
  flex: 1 1 auto;
  display: flex;
  min-height: 0;
}

/* ============================================================
   SIDEBAR
   ============================================================ */

.sidebar{
  width: var(--sidebar-w);
  flex: 0 0 auto;
  overflow-y: auto;
  border-right: var(--border-w) solid var(--border);
  background: var(--panel);
  padding: 16px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.sidebar::-webkit-scrollbar{
  width: 8px;
}

.sidebar::-webkit-scrollbar-thumb{
  background: var(--border);
  border-radius: 4px;
}

.panel{
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: var(--border-w) dashed var(--border);
}

.panel:last-of-type{
  border-bottom: none;
}

.panel-title{
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 1.5px;
  color: var(--fg-dim);
  margin: 0 0 10px;
  text-transform: uppercase;
}

.field{
  margin-bottom: 12px;
}

.field:last-child{
  margin-bottom: 0;
}

.field label{
  display: block;
  font-size: 11px;
  letter-spacing: 0.5px;
  color: var(--fg-dim);
  margin-bottom: 5px;
  text-transform: uppercase;
}

.field-row{
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}

.slider-field label{
  display: flex;
  justify-content: space-between;
}

.value-tag{
  color: var(--accent);
  text-transform: none;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
}

.hint-text{
  font-size: 11px;
  color: var(--fg-dim);
  margin: 6px 0 0;
  line-height: 1.5;
}

.privacy-note{
  font-size: 11px;
  color: var(--fg-dim);
  text-align: center;
  margin-top: 4px;
  opacity: 0.8;
}

/* ============================================================
   SOURCE / DROPZONE
   ============================================================ */

.dropzone{
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  cursor: pointer;
  background: var(--bg-raised);
  transition:
    border-color var(--transition),
    background var(--transition);
  position: relative;
  overflow: hidden;
}

.dropzone:hover,
.dropzone:focus-visible{
  border-color: var(--accent);
}

.dropzone.dragover{
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 8%, var(--bg-raised));
}

.dropzone-empty{
  padding: 18px;
}

.dz-line{
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--fg-dim);
}

.dz-or{
  margin: 0 0 10px;
  font-size: 11px;
  color: var(--fg-dim);
  opacity: 0.7;
}

.dz-hint{
  margin: 10px 0 0;
  font-size: 10.5px;
  color: var(--fg-dim);
  opacity: 0.6;
}

.dropzone-filled{
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

.dropzone-filled img{
  max-width: 100%;
  max-height: 220px;
  border-radius: 2px;
  display: block;
}

.file-meta{
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 11px;
  color: var(--fg-dim);
}

.file-name{
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--fg);
}

.file-dims{
  flex: 0 0 auto;
}

.compare-row{
  margin-top: 8px;
}

/* ============================================================
   OUTPUT AREA
   ============================================================ */

.output-area{
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-width: 0;
  position: relative;
  background: var(--bg);
}

.output-toolbar{
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: var(--border-w) solid var(--border);
  background: var(--panel);
}

.zoom-controls{
  display: flex;
  align-items: center;
  gap: 8px;
}

.zoom-value{
  font-size: 12px;
  color: var(--fg-dim);
  min-width: 42px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.output-actions{
  display: flex;
  gap: 8px;
}

/* ============================================================
   ASCII VIEWPORT
   ============================================================ */

.ascii-viewport{
  flex: 1 1 auto;
  min-width: 0;
  min-height: 0;

  overflow-x: auto;
  overflow-y: auto;

  position: relative;

  display: block;

  background:
    radial-gradient(
      ellipse at 50% 0%,
      color-mix(in srgb, var(--accent) 4%, transparent),
      transparent 60%
    ),
    var(--ascii-bg, var(--bg));

  /*
   * Make horizontal overflow belong to the viewport instead
   * of allowing the ASCII content to push the entire layout.
   */
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.ascii-viewport::-webkit-scrollbar{
  width: 9px;
  height: 9px;
}

.ascii-viewport::-webkit-scrollbar-thumb{
  background: var(--border);
  border-radius: 4px;
}

.ascii-viewport::-webkit-scrollbar-track{
  background: transparent;
}

/* ============================================================
   EMPTY OUTPUT
   ============================================================ */

.ascii-empty{
  position: absolute;
  inset: 0;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;

  color: var(--fg-dim);
  letter-spacing: 3px;
  text-align: center;
  pointer-events: none;
}

.ascii-empty p{
  margin: 0;
}

.ascii-empty-sub{
  margin-top: 8px !important;
  font-size: 11px;
  letter-spacing: 1px;
  opacity: 0.65;
}

/* ============================================================
   ASCII OUTPUT
   ============================================================ */

.ascii-output{
  /*
   * IMPORTANT:
   * width:max-content prevents the <pre> from being squeezed
   * to the viewport width. This is particularly important for
   * Unicode block characters such as █▓▒░.
   */
  display: block;
  width: max-content;
  min-width: max-content;

  margin: 24px;
  padding: 0;

  font-family: var(--font-mono);
  font-size: 8px;
  line-height: 1;
  letter-spacing: 0;

  white-space: pre;
  word-spacing: 0;

  color: var(--ascii-fg, var(--fg));

  /*
   * Prevent font features from changing character widths.
   */
  font-variant-ligatures: none;
  font-feature-settings:
    "liga" 0,
    "clig" 0,
    "calt" 0;

  /*
   * Keep the generated text as a real selectable text block.
   */
  user-select: text;
  cursor: text;

  /*
   * Zoom is applied here by JS.
   */
  transform-origin: top left;

  /*
   * Do not allow the <pre> itself to create another scrolling
   * context or wrap the generated lines.
   */
  overflow: visible;

  /*
   * Helps browsers keep the ASCII grid as one layout object.
   */
  contain: layout style;
}

/* ============================================================
   ORIGINAL IMAGE
   ============================================================ */

.compare-img{
  margin: 24px;
  max-width: calc(100% - 48px);
  max-height: calc(100% - 48px);
  object-fit: contain;
  border: var(--border-w) solid var(--border);
}

/* ============================================================
   TOAST
   ============================================================ */

.toast{
  position: absolute;
  bottom: 18px;
  left: 50%;

  transform: translate(-50%, 12px);

  background: var(--accent);
  color: var(--bg);

  padding: 8px 16px;
  border-radius: var(--radius);

  font-size: 12px;
  letter-spacing: 0.5px;

  opacity: 0;
  pointer-events: none;

  transition:
    opacity 160ms ease,
    transform 160ms ease;

  z-index: 20;
}

.toast.show{
  opacity: 1;
  transform: translate(-50%, 0);
}

.toast.error{
  background: var(--danger);
  color: #1a0d0a;
}

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

.footer{
  flex: 0 0 auto;
  height: var(--footer-h);

  display: flex;
  align-items: center;
  gap: 8px;

  padding: 0 16px;

  border-top: var(--border-w) solid var(--border);
  background: var(--panel);

  font-size: 10.5px;
  color: var(--fg-dim);
  letter-spacing: 0.5px;

  overflow: hidden;
  white-space: nowrap;
}

.footer-dot{
  opacity: 0.5;
}

.footer-shortcuts{
  margin-left: auto;
  opacity: 0.75;
}

/* ============================================================
   CRT EFFECT LAYER
   ============================================================ */

.crt-layer{
  position: fixed;
  inset: 0;

  pointer-events: none;
  z-index: 999;

  opacity: 0;

  transition: opacity 200ms ease;
}

body.crt-on .crt-layer{
  opacity: 1;
}

.crt-layer::before{
  content: '';

  position: absolute;
  inset: 0;

  background: repeating-linear-gradient(
    to bottom,
    rgba(0,0,0,0.18) 0px,
    rgba(0,0,0,0.18) 1px,
    transparent 2px,
    transparent 3px
  );

  mix-blend-mode: multiply;
}

.crt-layer::after{
  content: '';

  position: absolute;
  inset: 0;

  background:
    radial-gradient(
      ellipse at center,
      transparent 55%,
      rgba(0,0,0,0.55) 130%
    );

  animation: crtFlicker 6s infinite;
}

@keyframes crtFlicker{
  0%, 96%, 100%{
    opacity: 1;
  }

  97%{
    opacity: 0.94;
  }

  98%{
    opacity: 1;
  }

  99%{
    opacity: 0.97;
  }
}

/* ============================================================
   FULLSCREEN MODE
   ============================================================ */

.output-area:fullscreen{
  padding: 0;
  background: var(--ascii-bg, var(--bg));
}

.output-area:fullscreen .ascii-viewport{
  width: 100%;
  height: 100%;
}

.output-area:-webkit-full-screen .ascii-viewport{
  width: 100%;
  height: 100%;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 900px){

  body{
    overflow-y: auto;
    overflow-x: hidden;
    height: auto;
  }

  .app{
    height: auto;
    min-height: 100vh;
  }

  .workspace{
    flex-direction: column;
  }

  .sidebar{
    width: 100%;
    border-right: none;
    border-bottom: var(--border-w) solid var(--border);
    max-height: 50vh;
  }

  .output-area{
    min-height: 60vh;
  }

  .footer-shortcuts{
    display: none;
  }

  .header-actions{
    gap: 8px;
  }

  .logo{
    font-size: 24px;
  }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce){

  *{
    animation: none !important;
    transition: none !important;
  }
}

/* ============================================================
   OFFSCREEN
   ============================================================ */

.offscreen{
  display: none;
}
/* ============================================================
   FUNCTIONAL OUTPUT LAYOUTS / RAMP EDITOR / MEDIA PREVIEW
   ============================================================ */

.charset-editor{
  margin-top:12px;
  border:1px solid var(--border);
  background:var(--bg-raised);
  border-radius:var(--radius);
  overflow:hidden;
}

.charset-editor-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:7px 9px;
  border-bottom:1px dashed var(--border);
  color:var(--fg-dim);
  font-size:10px;
  letter-spacing:1px;
}

.charset-list{
  max-height:190px;
  overflow:auto;
  padding:5px;
}

.charset-item{
  display:grid;
  grid-template-columns:24px 38px 1fr;
  align-items:center;
  gap:6px;
  min-height:30px;
  border-bottom:1px solid color-mix(in srgb,var(--border) 55%,transparent);
}

.charset-item:last-child{border-bottom:0;}
.charset-index{font-size:10px;color:var(--fg-dim);text-align:center;}
.charset-glyph{
  width:34px;
  height:25px;
  padding:0;
  border:1px solid var(--border);
  background:var(--panel);
  color:var(--fg);
  cursor:pointer;
  font-family:var(--font-mono);
}
.charset-glyph:hover{border-color:var(--accent);color:var(--accent);}
.charset-density{font-size:9px;color:var(--fg-dim);letter-spacing:.6px;}
.charset-editor-actions{padding:7px;border-top:1px dashed var(--border);}

.dropzone-filled video{
  max-width:100%;
  max-height:220px;
  display:block;
  border-radius:2px;
}

.ascii-viewport.layout-ascii .compare-img{display:none!important;}

.ascii-viewport.layout-side-by-side,
.ascii-viewport.layout-split{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  align-items:center;
  gap:12px;
  padding:24px;
  overflow:auto;
}

.ascii-viewport.layout-side-by-side .ascii-output,
.ascii-viewport.layout-split .ascii-output{
  margin:0;
  justify-self:center;
}

.ascii-viewport.layout-side-by-side .compare-img,
.ascii-viewport.layout-split .compare-img{
  margin:0;
  max-width:100%;
  max-height:100%;
  justify-self:center;
}

.ascii-viewport.layout-stacked{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:18px;
  overflow:auto;
  padding:24px;
}

.ascii-viewport.layout-stacked .compare-img,
.ascii-viewport.layout-stacked .ascii-output{
  margin:0;
  max-width:100%;
}

.compare-slider-wrap{
  flex:0 0 auto;
  padding:12px 16px;
  border-bottom:1px solid var(--border);
  background:var(--panel);
}

.compare-slider-stage{
  position:relative;
  width:100%;
  max-height:280px;
  min-height:80px;
  overflow:hidden;
  background:var(--ascii-bg,var(--bg));
  border:1px solid var(--border);
}

.compare-slider-original{
  display:block;
  width:100%;
  height:280px;
  object-fit:contain;
}

.compare-slider-ascii{
  position:absolute;
  inset:0;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--ascii-bg,var(--bg));
}

.compare-slider-ascii pre{
  margin:0;
  font-family:var(--font-mono);
  font-size:7px;
  line-height:1;
  white-space:pre;
  color:var(--ascii-fg,var(--fg));
}

.compare-slider-divider{
  position:absolute;
  top:0;
  bottom:0;
  left:50%;
  width:2px;
  transform:translateX(-1px);
  background:var(--accent);
  pointer-events:none;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
  gap:5px;
  color:var(--bg);
  font-size:9px;
}

.compare-slider{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  opacity:0;
  cursor:ew-resize;
}

@media(max-width:900px){
  .ascii-viewport.layout-side-by-side,
  .ascii-viewport.layout-split{grid-template-columns:1fr;}
}
#compareSlider{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  margin:0;
  opacity:0;
  cursor:ew-resize;
  z-index:5;
}