:root {
  color-scheme: dark;
  --bg: #0a0907;
  --panel: #15120e;
  --panel-2: #1b1711;
  --line: #3b2f1c;
  --gold: #f4c84b;
  --gold-2: #ffe99a;
  --guide: #78e8ff;
  --text: #fff7dc;
  --muted: #b9ae91;
  --radius: 18px;
}
* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  background:
    radial-gradient(circle at 50% -10%, rgba(244,200,75,.12), transparent 34rem),
    var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-tap-highlight-color: transparent;
}
button, input { font: inherit; }
button { touch-action: manipulation; cursor: pointer; }
button:disabled, input:disabled { cursor: default; }
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}
.app-shell {
  width: min(100%, 760px);
  margin: 0 auto;
  padding: max(12px, env(safe-area-inset-top)) 12px max(28px, env(safe-area-inset-bottom));
}
.topbar {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
h1 { margin: 0; font-size: clamp(1.3rem, 5vw, 1.8rem); letter-spacing: .02em; }
.topbar p { margin: 4px 0 0; color: var(--muted); font-size: .86rem; }
.lock-btn {
  flex: 0 0 auto;
  border: 1px solid #5e4a25;
  background: #1f1a11;
  color: var(--gold-2);
  border-radius: 999px;
  padding: 9px 12px;
  font-weight: 800;
}
.lock-btn:not(.is-on) { color: #ddd3bb; background: #171717; border-color: #3a3a3a; }
.preview-card, .panel {
  background: linear-gradient(180deg, rgba(30,25,18,.96), rgba(17,15,12,.96));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 30px rgba(0,0,0,.22);
}
.preview-card { padding: 8px; margin-bottom: 12px; }
.canvas-wrap, .adjust-canvas-wrap {
  position: relative;
  overflow: hidden;
  background: #000;
  touch-action: none;
  user-select: none;
}
.canvas-wrap.is-locked, .adjust-canvas-wrap.is-locked { touch-action: pan-y; }
.canvas-wrap {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 14px;
}
#editorCanvas, #adjustCanvas { display: block; width: 100%; height: 100%; }
.empty-hint {
  pointer-events: none;
  position: absolute;
  left: 50%; top: 53%; transform: translate(-50%,-50%);
  width: min(68%, 360px);
  padding: 16px 18px;
  border-radius: 14px;
  background: rgba(0,0,0,.6);
  border: 1px solid rgba(255,255,255,.12);
  text-align: center;
  backdrop-filter: blur(5px);
}
.empty-hint strong, .empty-hint span { display: block; }
.empty-hint span { margin-top: 5px; color: #c9c0a8; font-size: .8rem; line-height: 1.45; }
.status-row { display:flex; align-items:center; gap:10px; padding: 8px 4px 2px; font-size: .78rem; color:var(--muted); }
.badge { color:#2c1b00; background:linear-gradient(#fff1a5,#e9b72a); border-radius:999px; padding:4px 10px; font-weight:900; }
.panel { padding: 13px; margin-top: 12px; }
.panel-head { display:flex; justify-content:space-between; align-items:center; gap:10px; margin-bottom: 10px; }
.panel-head h2 { font-size: 1rem; margin: 0; }
.panel-head span { color: var(--muted); font-size:.76rem; }
.frame-strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 78px;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 1px 6px;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}
.frame-option {
  scroll-snap-align: start;
  border: 2px solid transparent;
  border-radius: 13px;
  padding: 3px;
  background: #090909;
  color: var(--text);
  position: relative;
  overflow: hidden;
}
.frame-option img { width:100%; aspect-ratio:1; display:block; border-radius:9px; object-fit:cover; }
.frame-option span {
  position:absolute; left:5px; right:5px; bottom:5px;
  font-size:.68rem; font-weight:800; padding:2px 4px; text-align:center;
  border-radius:6px; background:rgba(0,0,0,.72); color:#fff5c7;
}
.frame-option.selected { border-color: var(--gold); box-shadow: 0 0 0 2px rgba(244,200,75,.17); }
.frame-strip[aria-busy="true"] { opacity: .72; }
.file-button { display:block; }
.file-button input { position:absolute; width:1px; height:1px; opacity:0; pointer-events:none; }
.file-button span, .quick-grid button, .tool-toggle {
  display:flex; align-items:center; justify-content:center;
  min-height: 46px;
  border-radius: 12px;
  border: 1px solid #5c4826;
  background: linear-gradient(180deg,#2b2418,#1c1811);
  color: var(--text);
  font-weight: 800;
}
.file-button span { border-color:#8b6d2d; color:#fff2bd; }
.file-name { margin:8px 2px 0; font-size:.78rem; color:var(--muted); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.adjust-panel { position: relative; }
.adjust-preview-sticky {
  position: sticky;
  top: max(6px, env(safe-area-inset-top));
  z-index: 8;
  width: min(64vw, 330px);
  width: min(64vw, 38svh, 330px);
  margin: 0 auto 12px;
  padding: 5px;
  border-radius: 16px;
  background: rgba(12,10,8,.96);
  border: 1px solid #5f4a25;
  box-shadow: 0 12px 28px rgba(0,0,0,.45);
  backdrop-filter: blur(8px);
}
.adjust-canvas-wrap {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 12px;
}
.adjust-preview-label {
  position: absolute;
  right: 6px;
  bottom: 6px;
  z-index: 2;
  padding: 4px 7px;
  border-radius: 999px;
  background: rgba(0,0,0,.72);
  color: #fff4c5;
  font-size: .62rem;
  font-weight: 900;
  pointer-events: none;
}
.toggle-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:8px; margin-bottom:8px; }
.tool-toggle { min-height: 42px; font-size: .79rem; }
.tool-toggle.is-on { border-color:#8b6d2d; color:#fff1aa; box-shadow: inset 0 0 0 1px rgba(244,200,75,.12); }
#guideToggle.is-on { color: var(--guide); border-color: rgba(120,232,255,.5); }
.lock-btn:disabled, .tool-toggle:disabled { opacity:.48; }
.quick-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:8px; }
.quick-grid button:disabled { opacity:.42; }
.slider-row { display:grid; grid-template-columns:58px 1fr 54px; gap:9px; align-items:center; margin-top:13px; font-size:.8rem; }
.slider-row input { width:100%; accent-color: var(--gold); }
.slider-row output { text-align:right; font-variant-numeric: tabular-nums; color:var(--gold-2); }
.tip { margin:10px 1px 0; color:var(--muted); font-size:.75rem; line-height:1.55; }
.adjust-panel.is-locked .quick-grid,
.adjust-panel.is-locked .slider-row { opacity:.58; }
.adjust-panel.is-locked .quick-grid input,
.adjust-panel.is-locked .quick-grid button,
.adjust-panel.is-locked .slider-row input { pointer-events:none; }
.save-area { padding: 14px 2px 0; }
.save-grid { display:grid; grid-template-columns:1fr 1fr; gap:9px; }
.save-btn {
  width:100%; min-height:62px; border-radius:15px;
  font-weight:1000;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:2px;
}
.save-btn strong { font-size:.98rem; }
.save-btn span { font-size:.68rem; font-weight:800; opacity:.78; }
.save-primary {
  border:0;
  background: linear-gradient(180deg,#ffe88b,#dca514);
  color:#261800;
  box-shadow: 0 8px 20px rgba(226,171,24,.18);
}
.save-secondary {
  border: 1px solid #8b6d2d;
  background: linear-gradient(180deg,#30291b,#1d1810);
  color:#fff0b5;
}
.save-btn:disabled { filter: grayscale(1); opacity:.42; box-shadow:none; }
.save-area p { margin:8px 4px 0; text-align:center; color:var(--muted); font-size:.72rem; line-height:1.45; }
.toast {
  position:fixed; z-index:30; left:50%; bottom:max(18px, env(safe-area-inset-bottom));
  transform:translate(-50%, 16px); opacity:0; pointer-events:none;
  background:#fff2b5; color:#221700; font-weight:800; font-size:.82rem;
  max-width: calc(100vw - 24px); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  border-radius:999px; padding:10px 15px; transition:.18s ease;
  box-shadow:0 8px 25px rgba(0,0,0,.35);
}
.toast.show { opacity:1; transform:translate(-50%, 0); }
@media (min-width: 640px) {
  .app-shell { padding-left:18px; padding-right:18px; }
  .frame-strip { grid-auto-columns: 92px; }
  .quick-grid { grid-template-columns:repeat(4,1fr); }
  .adjust-preview-sticky { width: 330px; }
}
@media (max-width: 360px) {
  .save-grid { grid-template-columns:1fr; }
  .adjust-preview-sticky { width: min(70vw, 280px); }
}
@media (orientation: landscape) and (max-height: 600px) {
  .adjust-preview-sticky { width: min(42vh, 260px); }
}
@media (hover: hover) {
  button:not(:disabled):hover { filter: brightness(1.08); }
}
button:focus-visible, input:focus-visible {
  outline: 3px solid rgba(120,232,255,.8);
  outline-offset: 2px;
}