:root {
  --bg: #0b1016;
  --panel: rgba(18, 26, 35, 0.94);
  --text: #eef6fb;
  --muted: #9fb2c2;
  --muted-2: #758797;
  --border: #2f4050;
  --border-strong: #486074;
  --accent: #7fc7ff;
  --accent-text: #071018;
  --danger: #ff8a8a;
  --success: #9df0c3;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.32);
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(127, 199, 255, 0.18), transparent 32rem),
    radial-gradient(circle at top right, rgba(157, 240, 195, 0.08), transparent 30rem),
    linear-gradient(180deg, #0f1720 0%, var(--bg) 48%, #070b10 100%);
  color: var(--text);
  line-height: 1.5;
}

a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(8, 13, 19, 0.82);
  border-bottom: 1px solid rgba(127, 199, 255, 0.14);
}
.header-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 220px; }
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, #63b5ce 0 50%, #e64a21 50% 100%);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.16), 0 10px 24px rgba(0,0,0,0.26);
}
.brand-title { display: grid; gap: 1px; }
.brand-title strong { font-size: 1rem; }
.brand-title span { color: var(--muted); font-size: 0.8rem; }
.nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.nav a { color: var(--muted); border: 1px solid transparent; padding: 8px 11px; border-radius: 999px; font-size: 0.9rem; }
.nav a:hover { color: var(--text); background: rgba(255, 255, 255, 0.06); }

.app { max-width: 1180px; margin: 0 auto; padding: 30px 24px 46px; }
.hero { display: block; margin-bottom: 18px; }
.hero-card, .panel {
  background: var(--panel);
  border: 1px solid rgba(127, 199, 255, 0.14);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.hero-card { padding: 26px; overflow: hidden; position: relative; }
.hero-card::after {
  content: "";
  position: absolute;
  inset: auto -70px -95px auto;
  width: 230px;
  height: 230px;
  border-radius: 50%;
  background: rgba(127, 199, 255, 0.12);
  pointer-events: none;
}
.eyebrow {
  display: inline-flex;
  padding: 6px 10px;
  border: 1px solid rgba(127, 199, 255, 0.24);
  border-radius: 999px;
  color: #a7ddff;
  background: rgba(127, 199, 255, 0.08);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 14px;
}
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 10px; font-size: clamp(2rem, 4vw, 3.6rem); line-height: 1.02; letter-spacing: -0.05em; }
h2 { margin-bottom: 8px; font-size: 1.35rem; letter-spacing: -0.02em; }
h3 { margin-bottom: 10px; font-size: 1rem; color: var(--text); }
.subtitle { max-width: 880px; margin-bottom: 0; color: var(--muted); font-size: 1.02rem; }

.panel { padding: 20px; margin-bottom: 18px; scroll-margin-top: 86px; }
.section-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.section-copy { color: var(--muted); margin-bottom: 0; max-width: 760px; }

label, .field-label { display: block; margin-bottom: 8px; color: var(--text); font-weight: 800; font-size: 0.93rem; }
textarea {
  width: 100%;
  min-height: 48px;
  height: 48px;
  resize: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 13px 14px;
  background: rgba(6, 10, 15, 0.9);
  color: var(--text);
  caret-color: var(--text);
  font: 15px/20px Consolas, Monaco, "Courier New", monospace;
  outline: none;
  overflow: hidden;
  white-space: nowrap;
  scrollbar-width: none;
}
textarea::placeholder { color: rgba(159, 178, 194, 0.46); opacity: 1; font-style: italic; }
textarea::-webkit-scrollbar { display: none; }
textarea:focus, input[type="file"]:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(127, 199, 255, 0.16); }

.field-stack { display: grid; gap: 12px; }
.converter-io-row { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 12px; align-items: end; }
.converter-arrow { display: inline-flex; align-items: center; justify-content: center; min-width: 42px; height: 48px; color: var(--muted-2); font-size: 1.35rem; font-weight: 900; user-select: none; }
.input-picker-wrap { display: grid; grid-template-columns: minmax(0, 1fr) 48px; gap: 8px; align-items: stretch; }
.input-picker-wrap textarea { display: block; }
.input-picker-inline, .input-picker-inline .pickr, .input-picker-inline .pcr-button {
  width: 48px !important;
  height: 48px !important;
  min-width: 48px !important;
  min-height: 48px !important;
  max-width: 48px !important;
  max-height: 48px !important;
  border-radius: var(--radius-md) !important;
  overflow: hidden;
}
.input-picker-inline .pcr-button { border: 0 !important; box-shadow: none !important; outline: 0 !important; }
.input-picker-inline .pcr-button::before { display: none !important; content: none !important; background: transparent !important; }
.input-picker-inline .pcr-button::after { inset: 0 !important; border-radius: var(--radius-md) !important; border: 0 !important; box-shadow: none !important; outline: 0 !important; background-clip: padding-box !important; }

.workspace-card, .swap-card, .palette-file-preview {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.075);
  border-radius: var(--radius-lg);
  padding: 16px;
}
.controls, .sprite-controls, .button-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.converter-bottom-controls { justify-content: flex-start; align-items: center; gap: 12px; }
.converter-selects {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.035);
  border: 1px solid rgba(255,255,255,0.06);
  width: fit-content;
  backdrop-filter: blur(8px);
}
.format-menu { position: relative; display: inline-flex; align-items: center; gap: 6px; }
.converter-select-label { color: var(--muted-2); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.02em; text-transform: uppercase; }
.format-menu-button {
  position: relative;
  min-height: 30px;
  min-width: 140px;
  border-radius: 999px;
  background: transparent;
  border: 1px solid transparent;
  padding: 4px 34px 4px 12px;
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--text);
  box-shadow: none;
  text-align: left;
  white-space: nowrap;
}
.format-menu-button::after {
  content: "expand_more";
  position: absolute;
  right: 9px;
  top: 50%;
  transform: translateY(-50%);
  font-family: "Material Symbols Rounded";
  font-size: 16px;
  line-height: 1;
  color: var(--muted-2);
  pointer-events: none;
  transition: transform 90ms ease, color 90ms ease;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 20;
}
.format-menu.open .format-menu-button::after { transform: translateY(-50%) rotate(180deg); color: var(--text); }
.format-menu-button:hover, .format-menu.open .format-menu-button { background: rgba(255,255,255,0.055); border-color: rgba(255,255,255,0.06); }
.format-menu-list {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 30;
  display: none;
  min-width: 100%;
  padding: 6px;
  border-radius: var(--radius-md);
  background: #111923;
  border: 1px solid rgba(127, 199, 255, 0.16);
  box-shadow: 0 14px 34px rgba(0,0,0,0.42);
}
.format-menu.open .format-menu-list { display: grid; gap: 3px; }
.format-menu-list button { width: 100%; padding: 8px 10px; border-radius: var(--radius-sm); background: transparent; border: 0; color: var(--muted); box-shadow: none; text-align: left; font-size: 0.88rem; font-weight: 800; }
.format-menu-list button:hover { background: rgba(255,255,255,0.055); color: var(--text); transform: none; filter: none; }
.format-menu-list button.active { background: rgba(127, 199, 255, 0.13); color: var(--text); }

.pickr-anchor { width: 48px; height: 48px; }
.input-picker-inline.pickr-anchor { width: 48px !important; height: 48px !important; }
.output-copy-btn, .preview-download-btn, .upload-clear-btn, .swap-reset-btn, .copy-color-btn {
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: rgba(255,255,255,0.055);
  color: var(--muted);
  border: 1px solid var(--border);
  box-shadow: none;
}
.output-copy-btn { width: 48px; height: 48px; min-width: 48px; min-height: 48px; border-radius: var(--radius-md); }
.preview-download-btn, .upload-clear-btn, .swap-reset-btn { width: 30px; height: 30px; min-width: 30px; }
.copy-color-btn { width: 22px; height: 22px; min-width: 22px; }
.output-copy-btn:hover, .preview-download-btn:hover, .upload-clear-btn:hover, .swap-reset-btn:hover, .copy-color-btn:hover { color: var(--text); background: rgba(255,255,255,0.1); }
.preview-download-btn.active { color: var(--accent-text); background: var(--accent); border-color: transparent; }
.material-symbols-rounded { line-height: 1; font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 20; }
.output-copy-btn .material-symbols-rounded, .preview-download-btn .material-symbols-rounded { font-size: 18px; }
.upload-clear-btn .material-symbols-rounded, .swap-reset-btn .material-symbols-rounded { font-size: 16px; }
.copy-color-btn .material-symbols-rounded { font-size: 13px; }
.pickr .pcr-button { width: 100%; height: 44px; border-radius: 12px; border: 0 !important; box-shadow: none !important; outline: 0 !important; overflow: hidden; }
.pickr .pcr-button::before { display: none !important; content: none !important; background: transparent !important; }
.pickr .pcr-button::after { inset: 0 !important; border-radius: inherit !important; border: 0 !important; box-shadow: none !important; outline: 0 !important; background-clip: padding-box !important; }

.pcr-app[data-theme="nano"] {
  width: 280px !important;
  background: linear-gradient(180deg, rgba(20,28,38,0.985), rgba(13,18,26,0.985));
  border: 1px solid rgba(127,199,255,0.14);
  border-radius: 18px;
  box-shadow: 0 22px 54px rgba(0,0,0,0.42);
  color: var(--text);
  font-family: inherit;
  overflow: hidden;
  backdrop-filter: blur(18px);
}
.pcr-app[data-theme="nano"] .pcr-interaction { display: none !important; }
.pcr-app[data-theme="nano"] .pcr-selection {
  display: grid !important;
  grid-template-columns: 42px minmax(0, 1fr) !important;
  grid-template-areas:
    "palette palette"
    "preview chooser" !important;
  column-gap: 12px !important;
  row-gap: 8px !important;
  align-items: center !important;
  padding: 10px 10px 0;
}
.pcr-app[data-theme="nano"] .pcr-color-palette {
  grid-area: palette !important;
  position: relative !important;
  border-radius: 12px !important;
  overflow: hidden !important;
  border: 0 !important;
  box-shadow: none !important;
  background: var(--pickr-hue-color, #63B5CE) !important;
  clip-path: inset(0 round 12px) !important;
}
.pcr-app[data-theme="nano"] .pcr-color-palette::before,
.pcr-app[data-theme="nano"] .pcr-color-palette::after { display: none !important; content: none !important; background: none !important; }
.pcr-app[data-theme="nano"] .pcr-color-palette .pcr-palette {
  position: absolute !important;
  inset: 0 !important;
  border-radius: inherit !important;
  overflow: hidden !important;
  border: 0 !important;
  box-shadow: none !important;
  background:
    linear-gradient(to top, #000 0%, rgba(0,0,0,0) 100%),
    linear-gradient(to right, #fff 0%, rgba(255,255,255,0) 100%) !important;
  clip-path: inset(0 round 12px) !important;
  cursor: crosshair;
}
.pcr-app[data-theme="nano"] .pcr-color-palette .pcr-palette::before,
.pcr-app[data-theme="nano"] .pcr-color-palette .pcr-palette::after { display: none !important; content: none !important; background: none !important; }
.pcr-app[data-theme="nano"] .pcr-color-palette .pcr-picker { z-index: 5 !important; }
.pcr-app[data-theme="nano"] .pcr-color-preview {
  grid-area: preview !important;
  width: 34px !important;
  height: 34px !important;
  border-radius: 999px !important;
  overflow: hidden !important;
  border: 0 !important;
  box-shadow: none !important;
  background: var(--pickr-current-color, #63B5CE) !important;
  clip-path: circle(50% at 50% 50%) !important;
}
.pcr-app[data-theme="nano"] .pcr-color-preview::before,
.pcr-app[data-theme="nano"] .pcr-color-preview::after,
.pcr-app[data-theme="nano"] .pcr-color-preview .pcr-last-color,
.pcr-app[data-theme="nano"] .pcr-color-preview .pcr-current-color { display: none !important; opacity: 0 !important; visibility: hidden !important; }
.pcr-app[data-theme="nano"] .pcr-color-chooser {
  grid-area: chooser !important;
  position: relative !important;
  width: 100% !important;
  height: 32px !important;
  min-height: 32px !important;
  max-height: 32px !important;
  margin: 0 !important;
  border: 0 !important;
  box-shadow: none !important;
  overflow: hidden !important;
  border-radius: 999px !important;
}
.pcr-app[data-theme="nano"] .pcr-color-chooser .pcr-slider {
  position: absolute !important;
  left: 0 !important;
  right: 0 !important;
  top: 50% !important;
  height: 16px !important;
  transform: translateY(-50%) !important;
  margin: 0 !important;
  border-radius: 999px !important;
  overflow: hidden !important;
}
.pcr-app[data-theme="nano"] .pcr-color-chooser .pcr-picker {
  width: 16px !important;
  height: 16px !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  margin: 0 !important;
  border: 2px solid #fff !important;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.45) !important;
  z-index: 3 !important;
}
.pickr-format-fields {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 4px 12px 10px;
  border-top: 1px solid rgba(255,255,255,0.06);
  align-items: center;
}
.pickr-format-label { color: var(--muted-2); font-size: 0.75rem; font-weight: 500; letter-spacing: 0.02em; margin: 0 0 2px; opacity: 0.92; }
.pickr-format-row { display: grid; grid-template-columns: 100px minmax(0, 1fr); gap: 10px; align-items: center; position: relative; }
.pickr-format-row::before, .pickr-format-row::after { display: none !important; content: none !important; }
.pickr-format-select {
  margin: 0;
  align-self: stretch;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  width: 100%;
  min-height: 36px;
  height: 36px;
  padding: 5px 30px 5px 10px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  background-color: rgba(14,20,28,0.98);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239fb2c2' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  color: var(--text);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  outline: none;
  background-repeat: no-repeat;
  background-position: right 9px center;
  background-size: 12px;
  transition: border-color 90ms ease, background 90ms ease, box-shadow 90ms ease;
}
.pickr-format-select:hover { border-color: rgba(127, 199, 255, 0.24); background-color: rgba(16,24,34,0.98); }
.pickr-format-input {
  min-width: 0;
  width: 100%;
  min-height: 36px;
  height: 36px;
  padding: 5px 7px 5px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #000000;
  color: var(--text);
  font: 12px/1.2 Consolas, Monaco, "Courier New", monospace;
  text-align: left;
  outline: none;
  overflow: hidden;
  background-clip: padding-box;
}
.pickr-format-input:focus, .pickr-format-select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(127, 199, 255, 0.12); }

input[type="file"], select { min-height: 42px; border: 1px solid var(--border); border-radius: 12px; background: rgba(6, 10, 15, 0.9); color: var(--text); padding: 8px 10px; outline: none; max-width: 100%; }
button, .button-link { border: 0; border-radius: 999px; padding: 10px 15px; background: var(--accent); color: var(--accent-text); font-weight: 900; cursor: pointer; box-shadow: 0 10px 24px rgba(127, 199, 255, 0.12); transition: transform 90ms ease, filter 90ms ease; }
button.secondary { background: rgba(255, 255, 255, 0.035); color: var(--text); border: 1px solid rgba(255,255,255,0.06); box-shadow: none; backdrop-filter: blur(8px); }
button:hover { filter: brightness(1.08); transform: translateY(-1px); }
button:active { transform: translateY(0); }
.error { color: var(--danger); margin-top: 12px; display: none; white-space: pre-line; background: rgba(255, 138, 138, 0.08); border: 1px solid rgba(255, 138, 138, 0.18); border-radius: var(--radius-md); padding: 10px 12px; }
.toast { min-height: 22px; margin-top: 10px; color: var(--success); font-size: 0.9rem; }

.sprite-workbench { display: grid; grid-template-columns: minmax(300px, 360px) minmax(0, 1fr); gap: 24px; align-items: stretch; }
.sprite-left-stack { display: grid; gap: 12px; align-content: start; }
.sprite-preview-stack { position: sticky; top: 86px; align-self: start; min-width: 0; display: flex; flex-direction: column; gap: 18px; overflow: visible; }
.preview-grid { display: grid; grid-template-columns: repeat(2, minmax(220px, 1fr)); gap: 12px; align-items: stretch; }
.preview-panel { min-width: 0; display: grid; grid-template-rows: auto 1fr; }
.upload-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.upload-head h3 { margin-bottom: 0; }
.sprite-controls { margin-bottom: 12px; }
.canvas-box {
  position: relative;
  background: #090d12;
  border: 1px solid var(--border);
  border-radius: 18px;
  height: clamp(300px, 28vw, 360px);
  min-height: 300px;
  padding: 12px;
  display: grid;
  place-items: center;
  overflow: auto;
}
.canvas-box canvas {
  image-rendering: pixelated;
  background:
    linear-gradient(45deg, rgba(255,255,255,0.035) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(255,255,255,0.035) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.035) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.035) 75%),
    #1a222c;
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
  border-radius: 8px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.06);
}
.canvas-caption { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; min-height: 30px; }
.preview-actions { display: inline-flex; align-items: center; gap: 8px; min-height: 30px; }
.canvas-caption label { margin-bottom: 0; }
.canvas-size { color: var(--muted-2); font-size: 0.82rem; font-family: Consolas, Monaco, "Courier New", monospace; }
.zoom-controls { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; margin-top: 8px; }
.zoom-btn { padding: 7px 10px; min-width: 46px; background: rgba(255, 255, 255, 0.055); color: var(--text); border: 1px solid var(--border); box-shadow: none; }
.zoom-btn.active { background: var(--accent); color: var(--accent-text); border-color: transparent; }
.empty-state { display: grid; place-items: center; min-height: 82px; color: var(--muted-2); border: 1px dashed var(--border); border-radius: 18px; background: rgba(255, 255, 255, 0.025); text-align: center; padding: 18px; }

.palette-file-head { display: grid; grid-template-columns: 1fr; gap: 10px; margin-bottom: 12px; }
.palette-file-head h3 { margin-bottom: 0; }
.palette-file-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 10px; }
.palette-file-button-row { display: flex; align-items: center; gap: 8px; }
.palette-setting-toggle { display: inline-flex; align-items: center; gap: 8px; width: fit-content; }
.palette-setting-toggle span { margin-bottom: 0; }
.palette-setting-toggle input[type="checkbox"] { width: 14px; height: 14px; min-height: 14px; accent-color: var(--accent); cursor: pointer; border-radius: 4px; box-shadow: none; }
.palette-file-text {
  width: 100%;
  height: 170px;
  min-height: 150px;
  resize: vertical;
  overflow: auto;
  white-space: pre;
  font: 12px/1.45 Consolas, Monaco, "Courier New", monospace;
  border-radius: var(--radius-md);
  scrollbar-width: thin;
  cursor: default;
}
.palette-file-text[readonly] { color: var(--muted); background: rgba(6, 10, 15, 0.72); }
.palette-file-text.is-editable { color: var(--text); background: rgba(6, 10, 15, 0.94); cursor: text; }
.palette-file-text::-webkit-scrollbar { display: initial; width: 8px; height: 8px; }
.palette-file-text::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.14); border-radius: 999px; }

.swap-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.caption-group { display: inline-flex; align-items: center; gap: 6px; }
.info-tip { position: relative; display: inline-flex; align-items: center; }
.info-tip-icon { font-size: 15px; color: var(--muted-2); cursor: default; user-select: none; transition: color 90ms ease; }
.info-tip:hover .info-tip-icon { color: var(--text); }
.info-tip-content { position: absolute; bottom: calc(100% + 7px); left: 0; background: #111923; border: 1px solid rgba(127, 199, 255, 0.16); border-radius: var(--radius-sm); padding: 6px 10px; font-size: 0.75rem; font-weight: 400; color: var(--muted); white-space: nowrap; pointer-events: none; opacity: 0; transition: opacity 120ms ease; z-index: 40; box-shadow: 0 8px 24px rgba(0,0,0,0.36); }
.info-tip:hover .info-tip-content { opacity: 1; }
.swap-row--highlighted { border-color: var(--accent) !important; background: rgba(127, 199, 255, 0.08) !important; }
.swap-row--pinned { border-color: var(--accent) !important; background: rgba(127, 199, 255, 0.16) !important; box-shadow: 0 0 0 2px rgba(127, 199, 255, 0.3); }
#originalCanvas.is-picking { cursor: crosshair; }
.swap-head h3 { margin-bottom: 0; }
.sprite-format-section-inline { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 10px; padding-top: 10px; border-top: 1px solid rgba(255,255,255,0.07); }
.sprite-format-label { color: var(--muted-2); font-size: 0.75rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; white-space: nowrap; }
.swap-list { display: grid; gap: 8px; max-height: 390px; overflow: auto; padding-right: 4px; }
.swap-row { display: grid; grid-template-columns: auto 1fr; gap: 10px; padding: 10px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.07); border-radius: var(--radius-md); }
.swap-map { display: flex; align-items: center; gap: 8px; min-width: 0; }
.swap-index { min-width: 18px; color: var(--muted-2); font-size: 0.82rem; font-weight: 800; text-align: center; flex-shrink: 0; }
.reset-all-btn { width: auto; min-width: 0; height: 32px; padding: 0 12px; gap: 6px; font-size: 0.8rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.04em; }
.swap-editor { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: center; }
.swap-editor-field, .swap-editor input {
  width: 100%;
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(6, 10, 15, 0.9);
  color: var(--text);
  font: 12px/1.2 Consolas, Monaco, "Courier New", monospace;
  outline: none;
  text-align: left;
}
.swap-editor input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(127, 199, 255, 0.14); }
.swap-row .pickr, .swap-row .pickr-anchor, .swap-row .pickr .pcr-button { width: 30px !important; height: 30px !important; min-width: 30px; min-height: 30px; max-width: 30px; max-height: 30px; border-radius: 999px !important; aspect-ratio: 1 / 1; flex-shrink: 0; box-sizing: border-box; }
.swap-row .pickr .pcr-button { border: 2px solid rgba(255,255,255,0.95) !important; background-color: var(--replacement-color) !important; box-shadow: 0 0 0 3px rgba(255,255,255,0.08), inset 0 0 0 1px rgba(255,255,255,0.95); cursor: pointer; transition: transform 90ms ease, box-shadow 90ms ease, border-color 90ms ease; position: relative; }
.swap-row .pickr .pcr-button:hover { transform: scale(1.08); box-shadow: 0 0 0 4px rgba(255,255,255,0.14), inset 0 0 0 1px rgba(255,255,255,1); }
.editable-color { position: relative; width: 30px; height: 30px; flex-shrink: 0; }
.editable-color .pickr, .editable-color .pickr-anchor, .editable-color .pickr .pcr-button { width: 30px !important; height: 30px !important; }

.footer-note { color: var(--muted); font-size: 0.9rem; line-height: 1.55; text-align: center; margin: 28px 0 0; }
.footer-note + .footer-note { margin-top: 2px; }
.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; }

@media (max-width: 900px) {
  .header-inner { align-items: flex-start; flex-direction: column; }
  .nav { justify-content: flex-start; }
  .sprite-workbench { grid-template-columns: 1fr; }
  .sprite-preview-stack { position: static; max-height: none; overflow: visible; }
  .preview-grid { grid-template-columns: 1fr; }
}
@media (max-width: 680px) {
  .converter-io-row { grid-template-columns: 1fr; }
  .converter-arrow { height: auto; margin: -2px 0; }
  .input-picker-wrap { grid-template-columns: minmax(0, 1fr) 48px; }
}
@media (max-width: 560px) {
  .app, .header-inner { padding-left: 14px; padding-right: 14px; }
  body { background: var(--bg); }
  .hero-card, .panel { padding: 16px; border-radius: 18px; }
  input[type="file"], select { width: 100%; }
  .swap-row { grid-template-columns: 1fr; }
}