:root {
  --bg: #0b1020;
  --panel: #121a2f;
  --panel-2: #17213b;
  --text: #e8f1ff;
  --muted: #9db0d3;
  --accent: #38d6ff;
  --accent-2: #7af0ff;
  --danger: #ff6b73;
  --warn: #ffd36a;
  --line: rgba(255,255,255,.12);
  --input: #0b1326;
  --shadow: rgba(0,0,0,.35);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #152343 0, var(--bg) 45%, #050814 100%);
  color: var(--text);
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 10, 25, .85);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}

h1, h2, h3, p { margin-top: 0; }
h1 { font-size: 22px; margin-bottom: 4px; letter-spacing: .3px; }
h2 { font-size: 18px; color: var(--accent-2); margin-bottom: 12px; }
p { color: var(--muted); }

.top-actions, .button-row, .file-row, .frame-toolbar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.asset-picker {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: end;
  margin: 10px 0 0;
}
.asset-picker label {
  min-width: 0;
}
.asset-picker select {
  width: 100%;
}
.layout {
  display: grid;
  grid-template-columns: minmax(320px, 1.05fr) minmax(360px, 1.1fr) minmax(320px, .95fr);
  gap: 14px;
  padding: 14px;
}

.panel {
  background: linear-gradient(180deg, rgba(23,33,59,.98), rgba(12,18,34,.98));
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 18px 50px var(--shadow);
  padding: 14px;
  min-width: 0;
}

.notice, .hint, .warning {
  border-radius: 10px;
  padding: 10px;
  font-size: 13px;
  line-height: 1.35;
}
.notice { background: rgba(56,214,255,.08); border: 1px solid rgba(56,214,255,.22); color: #c8f6ff; }
.hint { background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.08); color: var(--muted); }
.warning { background: rgba(255, 211, 106, .13); border: 1px solid rgba(255, 211, 106, .45); color: #ffe6a0; margin: 10px 0; }
.hidden { display: none; }

button, .file-label {
  border: 1px solid rgba(255,255,255,.16);
  background: linear-gradient(180deg, #223150, #121c32);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  font-weight: 650;
  font-size: 13px;
  min-height: 36px;
  box-shadow: inset 0 1px rgba(255,255,255,.08);
}
button:hover, .file-label:hover { border-color: rgba(56,214,255,.55); transform: translateY(-1px); }
button:active { transform: translateY(0); }
button.primary, .primary { background: linear-gradient(180deg, #18b8e6, #0b6b98); border-color: rgba(122,240,255,.85); color: #04111a; }
button.primary-lite, .primary-lite { background: linear-gradient(180deg, #1e7898, #17445f); border-color: rgba(122,240,255,.45); }
button.good { background: linear-gradient(180deg, #4de18a, #16884d); border-color: rgba(160,255,197,.75); color: #03140c; }
button.danger-lite { border-color: rgba(255,107,115,.45); color: #ffd0d3; background: linear-gradient(180deg, #492035, #241225); }
button:disabled {
  cursor: not-allowed;
  opacity: .48;
  transform: none;
}
.file-label { display: inline-flex; align-items: center; gap: 8px; }
.file-label input { display: none; }
.file-label.small { justify-content: center; }

fieldset {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
  margin: 12px 0 0;
  background: rgba(0,0,0,.13);
}
legend { color: var(--accent-2); padding: 0 6px; font-weight: 800; font-size: 13px; letter-spacing: .2px; }

input, select, textarea {
  background: var(--input);
  color: var(--text);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 8px;
  padding: 8px;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56,214,255,.16); }
label { color: var(--muted); font-size: 13px; font-weight: 700; }
label input, label select { width: 100%; margin-top: 5px; }

.grid-two { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.control-grid { display: grid; grid-template-columns: 1fr; gap: 9px; }
.control-line label { display: block; margin-bottom: 5px; }
.nudge-row { display: grid; grid-template-columns: 52px 52px 1fr 52px 52px; gap: 6px; align-items: center; }
.nudge-row input { width: 100%; min-width: 0; text-align: center; }
.button-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.checkline { display: flex; align-items: center; gap: 8px; margin-top: 10px; }
.checkline input { width: auto; margin: 0; }

.status-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 12px 0; }
.status-grid div { background: rgba(0,0,0,.2); border: 1px solid var(--line); border-radius: 10px; padding: 8px; min-width: 0; }
.status-grid span { display: block; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: .5px; }
.status-grid strong { display: block; margin-top: 3px; font-size: 13px; overflow-wrap: anywhere; }

.canvas-card, .preview-area, .anim-preview {
  background-color: #0a0f1f;
  background-image: linear-gradient(45deg, rgba(255,255,255,.08) 25%, transparent 25%),
                    linear-gradient(-45deg, rgba(255,255,255,.08) 25%, transparent 25%),
                    linear-gradient(45deg, transparent 75%, rgba(255,255,255,.08) 75%),
                    linear-gradient(-45deg, transparent 75%, rgba(255,255,255,.08) 75%);
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
  border-radius: 12px;
  border: 1px solid var(--line);
  overflow: auto;
  padding: 8px;
  min-height: 160px;
}
canvas { image-rendering: pixelated; image-rendering: crisp-edges; }
#sheetCanvas { width: 100%; max-height: 62vh; display: block; margin: auto; cursor: crosshair; }
#frameCanvas, #animCanvas { display: block; margin: auto; max-width: 100%; height: auto; }
#rowStripCanvas { width: 100%; height: auto; border: 1px solid var(--line); border-radius: 10px; margin-top: 10px; background: rgba(0,0,0,.23); }
#jsonPreview { width: 100%; min-height: 170px; resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12px; color: #d6e7ff; }

footer { text-align: center; padding: 22px; color: var(--muted); }

@media (max-width: 1180px) {
  .layout { grid-template-columns: 1fr 1fr; }
  .play-panel { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .topbar { flex-direction: column; }
  .layout { grid-template-columns: 1fr; }
  .grid-two, .status-grid, .button-grid { grid-template-columns: 1fr; }
  .asset-picker { grid-template-columns: 1fr; }
  .nudge-row { grid-template-columns: 46px 46px 1fr 46px 46px; }
}

/* v2 additions */
.top-file { white-space: nowrap; }
.drop-zone {
  margin: 12px 0 10px;
  border: 2px dashed rgba(122,240,255,.45);
  background: rgba(56,214,255,.06);
  border-radius: 14px;
  padding: 16px;
  display: grid;
  gap: 4px;
  text-align: center;
  color: #c8f6ff;
}
.drop-zone strong { color: var(--accent-2); font-size: 14px; }
.drop-zone span { color: var(--muted); font-size: 12px; }
.drop-zone.dragging {
  background: rgba(56,214,255,.16);
  border-color: rgba(122,240,255,.95);
  box-shadow: 0 0 0 4px rgba(56,214,255,.12);
}
.status-grid { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1180px) {
  .status-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .status-grid { grid-template-columns: 1fr; }
}