/* =====================================================================
   CSS Gradient Generator Pro — app.css
   Extends the shared design system (base.css). Colors derive ONLY from
   base.css CSS variables, except for user-controlled gradient/preset
   swatch colors, which are inherently hardcoded hex by nature of the
   feature (they ARE the content being edited).
   ===================================================================== */

/* ---- Theme toggle icon swap (sun in dark, moon in light) ---- */
[data-theme="light"] .icon-sun { display: none; }
.icon-moon { display: none; }

/* ===================== Toolbar ===================== */
.toolbar-panel { padding: var(--space-4) var(--space-5); }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-4);
}
.toolbar-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}
.toolbar .spacer { flex: 1; }

/* ===================== Preview panel ===================== */
.preview-panel {
  margin-top: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.preview-swatch {
  min-height: 260px;
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  transition: background var(--dur-1) linear;
}
.css-output-row {
  display: flex;
  align-items: stretch;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.css-output {
  flex: 1;
  min-width: 240px;
  margin: 0;
  padding: var(--space-4) var(--space-5);
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 13.5px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-secondary);
}
.css-output-row .btn { flex: none; align-self: center; }

/* ===================== Controls layout ===================== */
.controls-grid {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: start;
}
.panel-title {
  margin: 0 0 var(--space-4);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.control-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.control-block + .field { margin-top: var(--space-5); }

.angle-number {
  width: 84px;
  flex: none;
  text-align: center;
  padding: 9px 10px;
}
.pos-slider-label {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  flex: 1;
  min-width: 140px;
}

/* Position preset 3x3 grid */
.pos-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  max-width: 168px;
}
.pos-grid button {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: background var(--dur-1), border-color var(--dur-1), transform var(--dur-1);
}
.pos-grid button:hover { background: var(--surface-3); transform: translateY(-1px); }
.pos-grid button.is-active { border-color: var(--brand-500); background: var(--gradient-brand-soft); }
.pos-grid button .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--text-muted);
}
.pos-grid button.is-active .dot { background: var(--brand-400); box-shadow: 0 0 8px var(--brand-500); }

/* Presets */
.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.preset-swatch {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  cursor: pointer;
  flex: none;
  transition: transform var(--dur-1) var(--ease), border-color var(--dur-1), box-shadow var(--dur-2);
  position: relative;
}
.preset-swatch:hover { transform: translateY(-2px) scale(1.04); border-color: var(--border-strong); box-shadow: var(--shadow-md); }
.preset-swatch:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(99,102,241,.45); }

/* ===================== Color stops ===================== */
.stops-hint { margin: 0 0 var(--space-4); font-size: 13px; }
.stop-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.stop-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--dur-1), background var(--dur-1), opacity var(--dur-1);
}
.stop-row.is-dragging { opacity: .4; }
.stop-row.is-drop-target { border-color: var(--brand-500); }

.stop-drag-handle {
  cursor: grab;
  flex: none;
  color: var(--text-muted);
  display: grid;
  place-items: center;
  width: 20px;
  height: 32px;
  touch-action: none;
}
.stop-drag-handle:active { cursor: grabbing; }
.stop-drag-handle svg { width: 16px; height: 16px; }

.stop-color-input {
  flex: none;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
}
.stop-color-input::-webkit-color-swatch-wrapper { padding: 2px; }
.stop-color-input::-webkit-color-swatch { border: none; border-radius: 6px; }
.stop-color-input::-moz-color-swatch { border: none; border-radius: 6px; }

.stop-hex-input {
  flex: none;
  width: 96px;
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 9px 10px;
  text-transform: lowercase;
}

.stop-pos-slider {
  flex: 1;
  min-width: 90px;
}
.stop-pos-label {
  flex: none;
  width: 44px;
  text-align: right;
  font-size: 12.5px;
}

.stop-remove-btn {
  flex: none;
}
.stop-remove-btn:disabled {
  opacity: .3;
  cursor: not-allowed;
}

/* ===================== Shortcuts modal table ===================== */
.shortcut-table { width: 100%; border-collapse: collapse; }
.shortcut-table td {
  padding: 10px 4px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.shortcut-table tr:last-child td { border-bottom: none; }
.shortcut-table td:last-child { text-align: right; white-space: nowrap; }
.shortcut-table kbd + kbd { margin-left: 4px; }

/* ===================== Responsive ===================== */
@media (max-width: 860px) {
  .controls-grid { grid-template-columns: 1fr; }
  .preview-swatch { min-height: 200px; }
}

@media (max-width: 720px) {
  .toolbar .spacer { display: none; }
  .toolbar-group { width: 100%; }
  .css-output-row { flex-direction: column; }
  .css-output-row .btn { align-self: stretch; }
}

@media (max-width: 460px) {
  .stop-row { flex-wrap: wrap; }
  .stop-pos-slider { order: 5; flex-basis: 100%; }
  .stop-pos-label { order: 4; }
  .pos-grid { max-width: 100%; }
}