:root {
  color-scheme: only light;
  --ink: #1d1b1f;
  --muted: #5d5a67;
  --panel: #ffffff;
  --accent: #ff9f6e;
  --shadow: rgba(20, 12, 30, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: linear-gradient(160deg, #fff7ed, #f2f0ff);
  color: var(--ink);
  min-height: 100vh;
  padding: 28px 6vw 48px;
}

h1,
h2 {
  margin: 0 0 10px;
  font-weight: 600;
}

p {
  margin: 0 0 6px;
  color: var(--muted);
}

a {
  color: inherit;
  text-decoration: none;
}

.page-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.panel {
  background: rgba(255, 255, 255, 0.85);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 18px 36px var(--shadow);
  display: grid;
  gap: 24px;
}

.gallery h2 {
  margin-bottom: 6px;
}

.gallery-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}

.thumb {
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  border: 2px solid transparent;
  box-shadow: 0 8px 18px rgba(29, 27, 31, 0.12);
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.thumb img {
  width: 100%;
  height: 90px;
  object-fit: cover;
  display: block;
}

.thumb span {
  display: block;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--muted);
}

.thumb:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 159, 110, 0.6);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}

.controls label {
  display: grid;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

.controls input[type="text"],
.controls input[type="number"] {
  border-radius: 999px;
  border: 1px solid rgba(29, 27, 31, 0.15);
  padding: 8px 14px;
  font-size: 14px;
}

.file-btn input {
  margin-top: 6px;
}

.btn {
  border: none;
  border-radius: 999px;
  padding: 10px 18px;
  background: rgba(29, 27, 31, 0.1);
  cursor: pointer;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), #ffd59f);
}

.btn.ghost {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(29, 27, 31, 0.1);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(240px, 2fr) minmax(200px, 1fr);
  gap: 20px;
}

.canvas-wrap {
  background: #fff;
  border-radius: 16px;
  padding: 12px;
  box-shadow: 0 12px 24px rgba(29, 27, 31, 0.14);
}

canvas {
  width: 100%;
  display: block;
}

.sidebar {
  background: rgba(255, 255, 255, 0.9);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 10px 20px rgba(29, 27, 31, 0.12);
}

.sidebar ol {
  margin: 0 0 12px;
  padding-left: 20px;
  color: var(--muted);
  font-size: 14px;
}

.tips {
  font-size: 12px;
  color: var(--muted);
}

.output textarea {
  width: 100%;
  border-radius: 16px;
  border: 1px solid rgba(29, 27, 31, 0.1);
  padding: 12px;
  font-family: "Courier New", monospace;
  font-size: 13px;
  color: var(--ink);
  resize: vertical;
}

@media (max-width: 900px) {
  .workspace {
    grid-template-columns: 1fr;
  }
}