/* ============================================================
   生成器界面样式：纯黑白 + 圆角按钮
   ============================================================ */

:root {
  --bg:        #ffffff;
  --bg-soft:   #f5f5f5;
  --fg:        #111111;
  --fg-soft:   #666666;
  --line:      #e2e2e2;
  --line-strong:#111111;
  --radius:    12px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* body 用纵向 flex：内容区自适应，页脚自然贴底（内容超高时随页面滚动） */
body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ---------------- 顶栏 ---------------- */
.topbar {
  padding: 28px 24px 18px;
  border-bottom: 1px solid var(--line);
}
.topbar h1 {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.topbar .sub {
  margin: 0;
  color: var(--fg-soft);
  font-size: 13px;
}

/* ---------------- 布局 ---------------- */
.layout {
  display: grid;
  grid-template-columns: minmax(340px, 460px) 1fr;
  gap: 0;
  flex: 1;
}

.panel {
  padding: 22px 24px 32px;
}
.panel + .panel {
  border-left: 1px solid var(--line);
}

.panel-title {
  margin: 0 0 18px;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg);
}
.panel-title .hint {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--fg-soft);
  font-size: 12px;
}

/* ---------------- 表单 ---------------- */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.field {
  display: block;
  margin-bottom: 14px;
}
.field > span {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-soft);
}

input[type="text"],
textarea,
select {
  width: 100%;
  padding: 9px 12px;
  font: inherit;
  font-size: 13px;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
textarea { resize: vertical; min-height: 62px; }

input[type="text"]:focus,
textarea:focus,
select:focus {
  border-color: var(--line-strong);
  box-shadow: 0 0 0 3px rgba(17,17,17,.08);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23111' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

/* ---------------- 按钮（圆角） ---------------- */
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.btn {
  appearance: none;
  padding: 9px 18px;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 999px;          /* 圆角 */
  cursor: pointer;
  transition: background .15s, color .15s, transform .06s;
}
.btn:hover { background: var(--bg-soft); }
.btn:active { transform: translateY(1px); }

.btn-primary {
  color: #fff;
  background: var(--fg);
  border-color: var(--fg);
}
.btn-primary:hover { background: #333; border-color: #333; }

/* ---------------- 预览 ---------------- */
.preview-panel {
  display: flex;
  flex-direction: column;
}
.preview {
  flex: 1;
  width: 100%;
  min-height: 520px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

/* ---------------- 页脚：开源仓库 ---------------- */
.site-footer {
  flex: none;
  margin-top: 28px;
  padding: 18px 24px 24px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: center;
}

.gh-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg-soft);
  font-size: 13px;
  text-decoration: none;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}

.gh-link:hover {
  color: #fff;
  background: var(--fg);
  border-color: var(--fg);
}

.gh-icon { flex: none; }

/* ---------------- 窄屏 ---------------- */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .panel + .panel { border-left: none; border-top: 1px solid var(--line); }
  .grid { grid-template-columns: 1fr; }
  .preview { min-height: 420px; }
  .gh-link span { font-size: 12px; }
}