@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@300;400;500&display=swap');

/* ── Reset & Variables ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:       #0e0e10;
  --panel:    #17171a;
  --border:   #2a2a2e;
  --accent:   #e8ff47;
  --accent2:  #47ffe8;
  --red:      #ff4747;
  --text:     #f0f0f4;
  --on-accent: #0e0e10; /* text colour used on top of --accent/--accent2 fills */

  /* Canvas fills, read by app.js (cssVar) so the canvas follows the theme */
  --canvas-bg:          #111113;
  --canvas-placeholder: #3a3a40;

  /* Viewport border, swapped by the .cursor-inside class on #vpWrap */
  --vp-border-inside:  #47ffe8;
  --vp-border-outside: #3a5a56;

  /* Area around the viewport, kept distinct from --canvas-bg */
  --outer-bg:      #232b28;
  --outer-texture: rgba(255,255,255,0.035);
}

/* Light theme: data-theme on <html>, set by app.js */
:root[data-theme="light"] {
  --bg:       #f4f4f6;
  --panel:    #ffffff;
  --border:   #d8d8de;
  --accent:   #8a7400;
  --accent2:  #007a70;
  --red:      #c62828;
  --text:     #1a1a1e;
  --on-accent: #ffffff;

  --canvas-bg:          #e4e4e8;
  --canvas-placeholder: #aeaeb6;

  --vp-border-inside:  #007a70;
  --vp-border-outside: #b7d6d2;

  --outer-bg:      #c3d0cb;
  --outer-texture: rgba(0,0,0,0.04);
}

/* ── Layout ── */
body {
  font-family: 'IBM Plex Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  overflow: hidden;
  user-select: none;
}

aside {
  width: 256px;
  min-width: 256px;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 10;
}

/* ── Main canvas area ── */
main {
  flex: 1;
  position: relative;
  background-color: var(--outer-bg);
  background-image: repeating-linear-gradient(45deg, var(--outer-texture) 0 1px, transparent 1px 3px);
  overflow: hidden;
}
main.drag-over {
  outline: 2px dashed var(--accent);
  outline-offset: -8px;
}

/* Canvas wrapper, positioned by app.js; its border is the viewport frame */
#vpWrap {
  position: absolute;
  border: 4px solid var(--vp-border-outside);
  border-radius: 1px;
  transition: border-color 0.18s ease;
  box-shadow: 0 6px 40px rgba(0,0,0,0.65), 0 0 0 1px rgba(255,255,255,0.04);
  line-height: 0; /* remove inline gap under canvas */
}

#vpWrap.cursor-inside {
  border-color: var(--vp-border-inside);
}

#canvas {
  display: block;
}

/* ── Sidebar Header ── */
.sidebar-header {
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--border);
}
.sidebar-header h1 {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.sidebar-header p {
  font-size: 12px;
  color: var(--text);
  margin-top: 3px;
}
/* ── Panels ── */
.panel {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.panel-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 9px;
  cursor: pointer; /* the whole heading row toggles the panel */
}
.panel-label:hover { color: var(--accent); }
.panel-toggle {
  background: none;
  border: none;
  color: inherit;
  font-size: 10px;
  line-height: 1;
  padding: 2px;
  cursor: pointer;
  flex-shrink: 0;
}
.panel.collapsed .panel-label { margin-bottom: 0; }
.panel.collapsed .panel-body { display: none; }

/* ── Tool-mode toggle button ── */
.tool-toggle-btn {
  display: block;
  width: 100%;
  margin-bottom: 8px;
}

/* ── File drop ── */
.file-drop {
  border: 1px dashed var(--border);
  border-radius: 4px;
  padding: 12px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  font-size: 12px;
  color: var(--text);
  line-height: 1.5;
}
.file-drop:hover,
.file-drop.drag-over {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 4%, transparent);
  color: var(--accent);
}
.file-drop input { display: none; }
/* Long unbroken filenames wrap rather than overflow */
#fileLabel { overflow-wrap: anywhere; }

.image-dimensions {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--text);
  margin-top: 7px;
}

/* ── Warning ── */
#warning {
  display: none;
  background: rgba(255,71,71,0.08);
  border: 1px solid var(--red);
  border-radius: 4px;
  padding: 10px 12px;
  font-size: 12px;
  color: var(--red);
  margin: 8px 16px;
}
#warning p {
  margin-bottom: 8px;
  line-height: 1.4;
}

/* ── Control rows ── */
.control-row {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 7px;
}
.control-row label {
  font-size: 12px;
  color: var(--text);
  min-width: 52px;
  flex-shrink: 0;
}
.control-row input[type="number"],
.control-row select {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  padding: 4px 7px;
  min-width: 0;
}
.control-row input[type="number"]:focus,
.control-row select:focus {
  outline: none;
  border-color: var(--accent);
}
.control-row input[type="color"] {
  flex: none;
  width: 36px;
  height: 26px;
  padding: 2px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  cursor: pointer;
}
.control-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  min-width: 0;
}
.value-label {
  font-size: 11px;
  color: var(--text);
  min-width: 34px;
  text-align: right;
  flex-shrink: 0;
}

/* ── Buttons ── */
.btn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  padding: 4px 8px;
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s, background 0.12s;
  white-space: nowrap;
}
.btn:hover          { border-color: var(--accent); color: var(--accent); }
.btn.active         { background: var(--accent); color: var(--on-accent); border-color: var(--accent); font-weight: 600; }
.btn.danger         { border-color: var(--red); color: var(--red); }
.btn.danger:hover   { background: var(--red); color: #fff; }
.btn.primary        { border-color: var(--accent2); color: var(--accent2); }
.btn.primary:hover  { background: var(--accent2); color: var(--on-accent); }

.btn-row {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
}
.undo-row .btn { flex: 1; }
.btn:disabled,
.btn:disabled:hover { opacity: 0.4; cursor: default; border-color: var(--border); color: var(--text); background: none; }

/* ── Checkboxes ── */
.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  cursor: pointer;
  margin-bottom: 6px;
}
.check-row:last-child { margin-bottom: 0; }
.check-row input[type="checkbox"] {
  accent-color: var(--accent);
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

/* ── Status bar ── */
#statusBar {
  margin-top: auto;
  padding: 9px 16px;
  border-top: 1px solid var(--border);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--text);
  min-height: 34px;
  line-height: 1.5;
}