.pattern-tool {
  color-scheme: light;
  --bg: #ebe9e4;
  --surface: #ffffff;
  --surface-strong: #dedbd4;
  --text: #1d1d1f;
  --muted: #67655f;
  --line: #d2cec5;
  --accent: #1d1d1f;
  --accent-hover: #000000;
  --danger: #9b2f26;
  --danger-hover: #772018;
  --shadow: 0 18px 45px rgba(29, 29, 31, 0.08);
}

.pattern-tool,
.pattern-tool * {
  box-sizing: border-box;
}

.pattern-tool {
  width: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.pattern-tool button,
.pattern-tool input,
.pattern-tool select {
  font: inherit;
}

.pattern-tool .eyebrow {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.pattern-tool h1,
.pattern-tool h2,
.pattern-tool p {
  margin-top: 0;
}

.pattern-tool h1 {
  margin-bottom: 0;
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  line-height: 1;
}

.pattern-tool h2 {
  margin-bottom: 14px;
  font-size: 0.92rem;
  letter-spacing: 0;
}

.pattern-tool select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  padding: 9px 34px 9px 11px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(250px, 300px) minmax(520px, 1fr);
  gap: 16px;
  align-items: start;
  width: 100%;
  padding: 12px clamp(12px, 2vw, 24px) 28px;
}

.preview-panel,
.control-panel {
  width: 100%;
  min-width: 0;
}

.canvas-shell {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  height: 640px;
  min-height: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.canvas-shell.is-dragging {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 28%, transparent), var(--shadow);
}

.pattern-tool canvas {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 8px;
  padding: 22px;
  text-align: center;
  pointer-events: none;
}

.empty-state strong {
  font-size: 1.15rem;
}

.empty-state span,
.file-name {
  color: var(--muted);
}

.empty-state.is-hidden {
  display: none;
}

.empty-state .file-picker {
  pointer-events: auto;
}

.control-panel {
  order: -1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-self: start;
}

.control-group,
.credits {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 12px;
}

.control-group summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: -2px 0 2px;
  color: var(--text);
  font-size: 0.92rem;
  font-weight: 800;
  list-style: none;
  cursor: pointer;
}

.control-group summary::-webkit-details-marker {
  display: none;
}

.control-group summary::after {
  content: "+";
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1;
}

.control-group[open] summary::after {
  content: "-";
}

.control-group label {
  display: grid;
  gap: 6px;
  margin-top: 9px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.control-group label > span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.pattern-tool output {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.pattern-tool input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.pattern-tool input[type="color"] {
  width: 100%;
  height: 34px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
}

.color-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.check-row {
  display: flex !important;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px !important;
}

.check-row input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.file-picker {
  display: grid;
  place-items: center;
  min-height: 58px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--text) !important;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease;
}

.file-picker:hover,
.file-picker.is-dragging {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--surface-strong));
}

.file-picker input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.file-name {
  margin: 8px 0 0;
  font-size: 0.76rem;
  overflow-wrap: anywhere;
}

.download-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.pattern-tool button {
  min-height: 40px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-weight: 800;
  cursor: pointer;
  transition: background 160ms ease, transform 160ms ease;
}

.pattern-tool button:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.danger-button {
  background: var(--danger);
}

.danger-button:hover {
  background: var(--danger-hover);
}

.credits {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
  text-align: center;
}

.credits img {
  justify-self: center;
  max-width: 170px;
  width: 100%;
  height: auto;
  border-radius: 6px;
}

@media (max-width: 980px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .canvas-shell {
    height: auto !important;
    min-height: 520px;
  }

  .control-panel {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .download-row,
  .credits {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .canvas-shell {
    height: auto !important;
    min-height: 360px;
  }

  .control-panel,
  .download-row,
  .color-row {
    grid-template-columns: 1fr;
  }
}