:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #2a2f3a;
  --text: #e7eaf0;
  --muted: #9aa3b2;
  --accent: #5b8cff;
  --accent-hover: #4a7bf0;
  --keep: #34d399;
  --detected: #f59e0b;
  --radius: 12px;
  --shadow: 0 6px 24px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.logo { font-size: 22px; }
.brand-name { letter-spacing: .3px; }
.ghlink { font-size: 13px; color: var(--muted); }

main { max-width: 1180px; margin: 0 auto; padding: 28px 20px 60px; }

/* Dropzone */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: 20px;
  background: var(--panel);
  padding: 64px 24px;
  text-align: center;
  transition: border-color .15s, background .15s, transform .05s;
  cursor: pointer;
  outline: none;
}
.dropzone.dragover {
  border-color: var(--accent);
  background: var(--panel-2);
}
.drop-icon { font-size: 40px; margin-bottom: 8px; }
.dropzone h1 { margin: 6px 0 4px; font-size: 30px; }
.subtitle { color: var(--muted); margin: 0 0 22px; font-size: 16px; }
.subtitle em { color: var(--text); font-style: normal; font-weight: 600; }
.hint { color: var(--muted); font-size: 13px; margin: 14px 0 2px; }
.formats { color: #6b7280; font-size: 12px; letter-spacing: 1px; margin-top: 4px; }

/* Buttons */
.btn {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 11px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .05s;
  color: var(--text);
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: var(--panel-2); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); }
.btn-sm { padding: 7px 12px; font-size: 13px; }
.btn-block { width: 100%; }

.hidden { display: none !important; }

/* Editor layout */
.editor {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 22px;
  align-items: start;
}
@media (max-width: 900px) {
  .editor { grid-template-columns: 1fr; }
}

.canvas-wrap {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}
.canvas-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.dims { color: var(--muted); font-size: 13px; font-variant-numeric: tabular-nums; }

.stage {
  /* checkerboard so transparency is visible */
  background-color: #2b2f38;
  background-image:
    linear-gradient(45deg, #20232b 25%, transparent 25%),
    linear-gradient(-45deg, #20232b 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #20232b 75%),
    linear-gradient(-45deg, transparent 75%, #20232b 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  padding: 18px;
  overflow: auto;
  position: relative;
}
#canvas, #bgCanvas, #erCanvas, #crCanvas {
  max-width: 100%;
  max-height: 68vh;
  image-rendering: auto;
  box-shadow: var(--shadow);
}

.legend {
  margin-top: 12px;
  display: flex;
  gap: 18px;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
}
.swatch {
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: 3px;
  margin-right: 5px;
  vertical-align: -1px;
}
.swatch.detected { background: var(--detected); }
.swatch.keep { background: var(--keep); }

/* Controls */
.controls {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  position: sticky;
  top: 18px;
}
.controls h2 { margin: 2px 0 16px; font-size: 16px; }
.field { margin-bottom: 20px; }
.field > label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
}
.val { color: var(--accent); font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); font-size: 12px; margin: 6px 0 0; line-height: 1.4; }
.center { text-align: center; }

/* Segmented control */
.seg {
  display: flex;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 3px;
  gap: 3px;
}
.seg button {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 8px 6px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
.seg button.active { background: var(--accent); color: #fff; }

.row { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.custom-color input[type="color"] {
  width: 42px; height: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  cursor: pointer;
  padding: 2px;
}

/* Sliders */
input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

select {
  width: 100%;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  font-size: 14px;
}

.result-box {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 20px;
}
.result-line {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  padding: 4px 0;
  color: var(--muted);
}
.result-line b { color: var(--text); font-variant-numeric: tabular-nums; }

.actions { display: flex; flex-direction: column; gap: 10px; }

.foot {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  padding: 30px 20px 50px;
}

#pickFromImage.armed { border-color: var(--detected); color: var(--detected); }
.stage.eyedropper { cursor: crosshair; }

/* ============================================================
   Tabs
   ============================================================ */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.tab {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
}
.tab:hover { border-color: var(--accent); color: var(--text); }
.tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ============================================================
   Remove-background tab
   ============================================================ */
.privacy-note {
  color: #6b7280;
  font-size: 12px;
  max-width: 520px;
  margin: 18px auto 0;
  line-height: 1.5;
}
.toolbar-group { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
#bgCompareBtn.armed { border-color: var(--accent); color: var(--accent); }
#bgCompareBtn { user-select: none; -webkit-user-select: none; touch-action: none; }
.status-line { margin-top: 12px; min-height: 16px; font-size: 12px; }
.status-line .muted { margin: 0; }

.error {
  color: #fca5a5;
  font-size: 13px;
  margin: 12px 0 0;
  line-height: 1.4;
}
#bgRetryRow { margin-top: 10px; }

/* Progress overlay on the canvas */
.progress-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 17, 21, .55);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  border-radius: 8px;
  z-index: 2;
}
.progress-card {
  width: min(360px, 90%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 22px;
  text-align: center;
  box-shadow: var(--shadow);
}
.progress-text { font-weight: 600; font-size: 14px; margin: 10px 0 10px; }
.progress-sub { color: var(--muted); font-size: 12px; margin-top: 8px; line-height: 1.4; min-height: 16px; }
.progress-bar {
  height: 6px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  position: relative;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 999px;
  transition: width .15s;
}
.progress-bar.indeterminate .progress-fill {
  position: absolute;
  width: 40%;
  animation: slide 1.1s ease-in-out infinite;
}
@keyframes slide {
  0%   { left: -40%; }
  100% { left: 100%; }
}
.spinner {
  width: 28px; height: 28px;
  margin: 0 auto;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Color picker for the new background */
.color-picker { margin-top: 12px; transition: opacity .15s; }
.color-picker.dimmed { opacity: .55; }
.color-picker.dimmed:hover { opacity: 1; }
.swatches {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 6px;
}
.swatch-btn {
  aspect-ratio: 1;
  width: 100%;
  border-radius: 8px;
  border: 2px solid var(--border);
  background:
    linear-gradient(var(--c), var(--c)),
    repeating-conic-gradient(#3a3f4b 0 25%, #262a33 0 50%) 0 0 / 10px 10px;
  cursor: pointer;
  padding: 0;
  transition: transform .08s, border-color .15s, box-shadow .15s;
}
.swatch-btn:hover { transform: scale(1.08); border-color: var(--muted); }
.swatch-btn.active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(91,140,255,.35); }
.color-picker .row { margin-top: 10px; }
.color-picker input[type="color"] {
  width: 42px; height: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  cursor: pointer;
  padding: 2px;
}
.hex {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
}

button:disabled { opacity: .5; cursor: not-allowed; }
select:disabled { opacity: .6; }

/* ============================================================
   Erase-color tab
   ============================================================ */
.stage.bg-white { background: #ffffff; }
.stage.bg-black { background: #000000; }

#erCanvas.picking  { cursor: crosshair; }
#erCanvas.brushing { cursor: none; touch-action: none; }

.brush-cursor {
  position: absolute;
  transform: translate(-50%, -50%);
  border: 1.5px solid #fff;
  outline: 1.5px solid rgba(0, 0, 0, .65);
  border-radius: 50%;
  pointer-events: none;
  z-index: 3;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .25) inset;
}
.brush-cursor.restore { border-color: var(--keep); }

.seg.seg-sm { padding: 2px; gap: 2px; }
.seg.seg-sm button { padding: 4px 10px; font-size: 11px; }
.legend .seg { flex: 0 0 auto; }
.legend .muted { margin: 0; }

#erColorPanel .row, #erBrushPanel .row { margin-top: 0; }

/* ============================================================
   Credits page
   ============================================================ */
.topbar a.brand { color: var(--text); text-decoration: none; }

.foot-links { margin-top: 8px; }
.foot-links a { color: var(--muted); }
.foot-links a:hover { color: var(--accent); }
.foot-sep { color: #4b5563; margin: 0 8px; }

.page { max-width: 900px; }
.page h1 { font-size: 30px; margin: 8px 0 10px; }
.page .lead {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
  margin: 0 0 8px;
  max-width: 70ch;
}
.page-section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-top: 20px;
}
.page-section h2 { font-size: 16px; margin: 0 0 12px; }
.page-section p { line-height: 1.6; }
.page-section a { text-decoration: none; }
.page-section a:hover { text-decoration: underline; }
.muted-inline { color: var(--muted); font-size: 12px; }
.inline-btn { display: inline-block; text-decoration: none; }

.credit-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.credit-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
}
.credit-card h3 { margin: 0 0 6px; font-size: 14px; }
.credit-card p { margin: 0; }

.table-scroll { overflow-x: auto; margin: 4px 0 12px; }
.lic-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 640px;
}
.lic-table th {
  text-align: left;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
  padding: 8px 12px 8px 0;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.lic-table td {
  padding: 12px 12px 12px 0;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  color: var(--muted);
  line-height: 1.5;
}
.lic-table tr:last-child td { border-bottom: none; }
.lic-table td:first-child { color: var(--text); font-weight: 600; }
.ver {
  display: block;
  font-size: 11px;
  color: var(--muted);
  font-weight: 400;
  margin-top: 2px;
}
.lic-tag {
  display: inline-block;
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}
.lic-tag.lic-copyleft { border-color: var(--detected); color: var(--detected); }

.cite {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.6;
  color: var(--text);
  margin: 0;
}
.page-section code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 5px;
}

.setup-note {
  border: 1px dashed var(--detected);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--detected);
  font-size: 12px;
  line-height: 1.5;
}
.setup-note code { border-color: var(--detected); color: var(--detected); }

/* Buy Me a Coffee button in the footer (self-hosted — no third-party requests) */
.foot-bmc { margin-top: 18px; }
.bmc-btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: #ffdd00;
  color: #0d0c22;
  border-radius: 12px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .2px;
  text-decoration: none;
  box-shadow: 0 2px 10px rgba(0,0,0,.35);
  transition: background .14s, transform .12s, box-shadow .14s;
}
.bmc-btn:hover {
  background: #ffe633;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255,221,0,.20);
}
.bmc-btn:active { transform: translateY(0); box-shadow: 0 2px 10px rgba(0,0,0,.35); }
.bmc-btn:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.bmc-btn svg { width: 20px; height: 20px; flex: none; }

/* ============================================================
   Crop tab
   ============================================================ */
.crop-wrap {
  position: relative;
  display: inline-block;
  line-height: 0;
  max-width: 100%;
  touch-action: none;
  cursor: crosshair;
}
#crCanvas { display: block; }

.crop-sel {
  position: absolute;
  box-sizing: border-box;
  border: 1px solid rgba(255,255,255,.95);
  box-shadow: 0 0 0 9999px rgba(10,12,16,.62);
  cursor: move;
}
.crop-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.28) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.28) 1px, transparent 1px);
  background-size: 33.333% 33.333%;
  background-position: 33.333% 0, 0 33.333%;
  background-repeat: repeat;
}
.crop-sel .ch {
  position: absolute;
  width: 12px; height: 12px;
  background: #fff;
  border: 1px solid rgba(0,0,0,.55);
  border-radius: 2px;
  box-shadow: 0 1px 3px rgba(0,0,0,.5);
}
.ch-nw { left: -6px;  top: -6px;    cursor: nwse-resize; }
.ch-n  { left: 50%;   top: -6px;    margin-left: -6px; cursor: ns-resize; }
.ch-ne { right: -6px; top: -6px;    cursor: nesw-resize; }
.ch-e  { right: -6px; top: 50%;     margin-top: -6px;  cursor: ew-resize; }
.ch-se { right: -6px; bottom: -6px; cursor: nwse-resize; }
.ch-s  { left: 50%;   bottom: -6px; margin-left: -6px; cursor: ns-resize; }
.ch-sw { left: -6px;  bottom: -6px; cursor: nesw-resize; }
.ch-w  { left: -6px;  top: 50%;     margin-top: -6px;  cursor: ew-resize; }

.ratio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}
.ratio-grid button {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 8px;
  padding: 9px 4px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color .15s, color .15s, background .15s;
}
.ratio-grid button:hover { border-color: var(--accent); color: var(--text); }
.ratio-grid button.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.num-row { display: flex; gap: 8px; margin-bottom: 8px; }
.num {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
}
.num span { color: var(--muted); font-size: 11px; font-weight: 700; }
.num input {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  outline: none;
  padding: 2px 0;
  min-width: 0;
}
.num input::-webkit-outer-spin-button,
.num input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }

.icon-btn { font-size: 16px; line-height: 1; padding: 7px 11px; min-width: 36px; }