/* Navy "RIVETS terminal" theme — mirrors the game's UiTheme palette. */
:root {
  --bg: #060912;            /* deep navy page (game panel base #010412) */
  --panel: #12161e;         /* UiTheme CARD_BG (18,22,30) */
  --panel-2: #0c0f17;       /* darker inset */
  --border: #416496;        /* UiTheme BORDER (65,100,150) */
  --border-bright: #5884ac; /* UiTheme BTN_PRIMARY_BORDER (88,132,172) */
  --text: #d2e1f5;          /* UiTheme TITLE (210,225,245) */
  --muted: #8798ac;         /* UiTheme BODY_MUTED (135,152,172) */
  --accent: #2cdcd7;        /* HUD cyan (44,220,215) */
  --accent-dim: #1f9e96;
  --terminal: #05e9bd;      /* TerminalManager text (5,233,189) */
  --danger: #e0603a;        /* warning orange-red */
  --btn: #345a80;           /* UiTheme BTN_PRIMARY (52,90,128) */
  --btn-ghost: #26303a;     /* UiTheme BTN_GHOST (38,48,58) */
  /* tile-derived swatch colors (sampled from the game sprites) */
  --sw-wall: #b0352b;
  --sw-floor: #1a2438;
  --sw-coin: #f5c518;
  --sw-goal: #1f9e7a;
  --sw-start: #4aa3e0;
  --grid-line: rgba(110, 135, 170, 0.16);
  --mono: "Cascadia Code", "Consolas", "SFMono-Regular", ui-monospace, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.5;
}

code { color: var(--accent); }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
}
.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.logo {
  height: 56px;
  width: auto;
  display: block;
  image-rendering: pixelated;   /* crisp pixel-art, matches the game */
}
.brand-sub {
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  white-space: nowrap;
}
.topbar-actions { display: flex; gap: 8px; flex-shrink: 0; }

.layout {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: stretch;   /* both columns share the taller one's height (the canvas) */
  padding: 20px 24px 40px;
}

.editor-pane { flex: 1 1 660px; min-width: 320px; }
.side-pane { flex: 1 1 360px; min-width: 300px; display: flex; flex-direction: column; gap: 16px; }

/* ── Palette ──────────────────────────────────────────────────────────────── */
.palette {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.tool {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
}
.tool:hover { border-color: var(--border-bright); }
.tool.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent) inset;
  color: var(--accent);
}
.swatch {
  width: 20px; height: 20px;
  border-radius: 3px;
  object-fit: cover;
  background: var(--sw-floor);
  image-rendering: auto;
}

/* ── Canvas + frame ───────────────────────────────────────────────────────── */
/* Matches the game: the frame covers the whole 24:20 play-area box. The grid
   fills the box (square tiles) and the frame is stretched to that same box and
   laid on top, so its border CLIPS the outer ~2 rows/columns on every side —
   both vertically and horizontally — exactly as the game does. The editor is
   then WYSIWYG with what the game actually shows. */
.frame-stage {
  position: relative;
  display: inline-block;
  width: 100%;
  max-width: 780px;
  aspect-ratio: 24 / 20;   /* the play-area box; canvas's intrinsic ratio → square tiles */
}
#grid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;            /* grid fills the box edge-to-edge */
  z-index: 1;
  cursor: crosshair;
  touch-action: none;
}
.frame-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;            /* stretched to the box; border clips the outer ~2 rows/cols */
  z-index: 2;
  pointer-events: none;    /* clicks pass through to the canvas */
}
.hint { color: var(--muted); margin: 8px 0 4px; font-size: 12px; }

/* ── Validity banner ──────────────────────────────────────────────────────── */
.validity {
  margin: 10px 0;
  padding: 8px 12px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--panel);
  font-size: 13px;
}
.validity.ok { border-color: var(--accent-dim); color: var(--accent); }
.validity.bad { border-color: var(--danger); color: var(--danger); }

/* ── Metadata ─────────────────────────────────────────────────────────────── */
.meta { display: flex; gap: 12px; flex-wrap: wrap; margin: 12px 0; }
.meta label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); flex: 1 1 180px; }
.meta input {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  padding: 7px 9px;
  font-family: inherit;
  font-size: 13px;
}
.meta input:focus, textarea:focus { outline: none; border-color: var(--accent); }

/* ── Gallery ──────────────────────────────────────────────────────────────── */
.gallery { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 4px; }
.gallery-label { color: var(--muted); font-size: 12px; }
.gallery-buttons { display: flex; gap: 8px; flex-wrap: wrap; }
.gallery-buttons .btn { font-size: 12px; }

/* ── Side panels ──────────────────────────────────────────────────────────── */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 14px 16px 16px;
}
.panel h2 {
  margin: 0 0 10px;
  font-size: 14px;
  letter-spacing: 1px;
  color: var(--accent);
  text-transform: uppercase;
}

/* The level form fills the column height; its .lvl textarea absorbs the slack. */
#level-form {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.field-grow {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.field-grow .output {
  flex: 1 1 auto;
  min-height: 180px;
}
.panel-hint { color: var(--muted); font-size: 12px; margin: 0 0 10px; }
.field { margin-bottom: 14px; }
.field:last-child { margin-bottom: 0; }
.field-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}
.field-head label { font-size: 12px; color: var(--muted); }
.field-actions { display: flex; gap: 6px; }

textarea {
  width: 100%;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: inherit;
  font-size: 12px;
  padding: 8px;
  resize: vertical;
}
textarea.output { white-space: pre; overflow-wrap: normal; color: var(--terminal); }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  background: var(--panel-2);
  border: 1px solid var(--border-bright);
  border-radius: 4px;
  color: var(--text);
  padding: 6px 12px;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
}
.btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn.flash { border-color: var(--accent); color: var(--accent); }
.file-btn { display: inline-flex; align-items: center; }

.import-actions { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.import-msg { margin-top: 10px; font-size: 13px; min-height: 18px; }
.import-msg.ok { color: var(--accent); }
.import-msg.bad { color: var(--danger); }

/* ── Import modal ─────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 60px 16px;
  background: rgba(3, 6, 14, 0.78);
  backdrop-filter: blur(2px);
}
.modal-overlay[hidden] { display: none; }
.modal {
  width: 100%;
  max-width: 560px;
  background: var(--panel);
  border: 1px solid var(--border-bright);
  border-radius: 6px;
  padding: 16px 18px 18px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.6);
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}
.modal-head h2 {
  margin: 0;
  font-size: 14px;
  letter-spacing: 1px;
  color: var(--accent);
  text-transform: uppercase;
}
.modal-close {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 22px;
  line-height: 1;
  padding: 2px 6px;
  cursor: pointer;
  font-family: inherit;
}
.modal-close:hover { color: var(--accent); }
.input { width: 100%; }