/* ═══════════════════════════════════════
   main.css — PZ Texture Editor
   Theme: Dark Industrial / Post-Apocalyptic
═══════════════════════════════════════ */

/* ── DESIGN TOKENS ─────────────────── */
:root {
  /* Base palette */
  --bg-root:        #0a0b0a;
  --bg-dark:        #101210;
  --bg-panel:       #161816;
  --bg-panel-alt:   #1c1f1c;
  --bg-hover:       #232623;
  --bg-input:       #141614;
  --bg-selected:    #1f2b14;

  /* Borders */
  --border:         #252825;
  --border-mid:     #2e332e;
  --border-light:   #3a403a;

  /* Text */
  --text-hi:        #dde3dd;
  --text-mid:       #8e968e;
  --text-lo:        #4d554d;

  /* Accent — military olive-green */
  --accent:         #7aab45;
  --accent-dark:    #537830;
  --accent-muted:   #4a6b2a;
  --accent-bright:  #9fd463;
  --accent-glow:    rgba(122, 171, 69, 0.18);

  /* Danger */
  --danger:         #b84444;
  --danger-hi:      #e05555;

  /* Warning */
  --warn:           #b89444;

  /* Fonts */
  --font-mono:      'Share Tech Mono', 'Courier New', monospace;
  --font-ui:        'Barlow', system-ui, sans-serif;
  --font-cond:      'Barlow Condensed', 'Barlow', sans-serif;

  /* Layout */
  --toolbar-h:      48px;
  --tool-panel-w:   224px;
  --right-panel-w:  272px;
  --statusbar-h:    26px;

  /* Radius */
  --radius-sm:      2px;
  --radius:         4px;

  /* Transition */
  --transition:     0.12s ease;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-root);
  color: var(--text-hi);
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.4;
  -webkit-font-smoothing: antialiased;
}

button { font-family: inherit; cursor: pointer; }
input, select { font-family: inherit; }
select option { background: var(--bg-panel-alt); }

/* ── SCROLLBAR ──────────────────────── */
::-webkit-scrollbar        { width: 6px; height: 6px; }
::-webkit-scrollbar-track  { background: var(--bg-dark); }
::-webkit-scrollbar-thumb  { background: var(--border-mid); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-dark); }

/* ── WORKSPACE LAYOUT ───────────────── */
#workspace {
  display: flex;
  height: calc(100vh - var(--toolbar-h));
  overflow: hidden;
}

/* ── SHARED COMPONENTS ──────────────── */

.hidden { display: none !important; }

/* Panel header bar */
.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 8px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--text-mid);
  flex-shrink: 0;
  user-select: none;
}
.panel-header-actions {
  display: flex;
  gap: 2px;
}

/* Icon button */
.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-mid);
  cursor: pointer;
  padding: 3px 5px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  line-height: 1;
  transition: color var(--transition), background var(--transition);
}
.icon-btn:hover { color: var(--text-hi); background: var(--bg-hover); }
.icon-btn.danger:hover { color: var(--danger-hi); }
.icon-btn.active, .icon-btn[data-active="true"] {
  color: var(--accent-bright);
}

/* Option label */
.option-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--text-mid);
  margin-top: 8px;
  margin-bottom: 3px;
}

/* Value display */
.val-display {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent);
  min-width: 28px;
  text-align: right;
}

/* Slider */
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 3px;
  background: var(--border-mid);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  cursor: grab;
  transition: background var(--transition), transform var(--transition);
}
.slider::-webkit-slider-thumb:hover { background: var(--accent-bright); transform: scale(1.2); }
.slider::-webkit-slider-thumb:active { cursor: grabbing; }

/* Select */
.option-select {
  background: var(--bg-input);
  color: var(--text-hi);
  border: 1px solid var(--border);
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  width: 100%;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition);
}
.option-select:focus { border-color: var(--accent-dark); }

/* Text input */
.option-input {
  background: var(--bg-input);
  color: var(--text-hi);
  border: 1px solid var(--border);
  padding: 4px 7px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  width: 100%;
  outline: none;
  transition: border-color var(--transition);
}
.option-input:focus { border-color: var(--accent-dark); }

/* Buttons */
.option-btn {
  background: var(--bg-panel-alt);
  color: var(--text-hi);
  border: 1px solid var(--border);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  width: 100%;
  margin-top: 5px;
  transition: background var(--transition), border-color var(--transition);
}
.option-btn:hover { background: var(--bg-hover); border-color: var(--border-light); }
.option-btn:active { transform: scale(0.98); }
.option-btn--accent {
  background: var(--accent-muted);
  border-color: var(--accent-dark);
  color: var(--accent-bright);
}
.option-btn--accent:hover { background: var(--accent-dark); border-color: var(--accent); }

/* Checkbox label */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 12px;
  color: var(--text-hi);
  cursor: pointer;
  margin-top: 7px;
  user-select: none;
}
.checkbox-label input[type="checkbox"] {
  accent-color: var(--accent);
  cursor: pointer;
}

/* Section header divider */
.section-header {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin-top: 14px;
  margin-bottom: 4px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

/* Hint text */
.hint-text {
  display: block;
  font-size: 10px;
  color: var(--text-lo);
  margin-top: 4px;
  line-height: 1.5;
}

/* Style button row (bold/italic/underline etc.) */
.style-buttons-row {
  display: flex;
  gap: 4px;
  margin-top: 4px;
}
.style-btn {
  background: var(--bg-panel-alt);
  color: var(--text-mid);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 12px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.style-btn:hover { color: var(--text-hi); background: var(--bg-hover); }
.style-btn.active {
  background: var(--accent-muted);
  border-color: var(--accent-dark);
  color: var(--accent-bright);
}

/* Spinner */
.spinner {
  width: 22px;
  height: 22px;
  border: 2px solid var(--border-mid);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Checkerboard pattern (transparency indicator) */
.checker-bg,
#checker-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, #1e201e 25%, transparent 25%),
    linear-gradient(-45deg, #1e201e 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #1e201e 75%),
    linear-gradient(-45deg, transparent 75%, #1e201e 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
  background-color: #141614;
  pointer-events: none;
  border-radius: inherit;
}

/* Number input no spinners */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
}
input[type=number] { -moz-appearance: textfield; }