/* ============ 仓储物流工具箱 · 共享样式 ============ */
:root {
  --bg: #0f1115; --bg-soft: #161922; --bg-card: #1b1f2a;
  --border: #2a2f3c; --border-soft: #232836;
  --text: #e6e9ef; --text-dim: #9aa3b2; --text-mute: #6b7280;
  --key: #7cb7ff; --string: #a8e6a3; --number: #f6c177;
  --boolean: #f0a6ca; --null: #6b7280; --punct: #6b7280;
  --comment: #e0823c; --comment-bg: rgba(224,130,60,.10);
  --accent: #6ea8fe; --error: #ef4444; --warn: #fbbf24; --ok: #a8e6a3;
  --radius: 10px;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f8fa; --bg-soft: #fff; --bg-card: #fff;
    --border: #e5e7eb; --border-soft: #eef0f3;
    --text: #1f2430; --text-dim: #5b6472; --text-mute: #9aa3b2;
    --key: #2563eb; --string: #16a34a; --number: #c2410c;
    --boolean: #be185d; --null: #9ca3af; --punct: #9aa3b2;
    --comment: #b45309; --comment-bg: rgba(180,83,9,.07);
    --accent: #2563eb; --error: #dc2626; --warn: #d97706; --ok: #16a34a;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Roboto, Arial, sans-serif;
  font-size: 14px; line-height: 1.6; -webkit-font-smoothing: antialiased;
}

/* ===== 顶部导航 ===== */
.app-shell { display: flex; flex-direction: column; height: 100vh; }
.topbar {
  background: var(--bg-soft); border-bottom: 1px solid var(--border);
  padding: 0 20px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  position: sticky; top: 0; z-index: 10;
}
.topbar .brand { display: flex; align-items: center; gap: 10px; padding: 12px 0; cursor: pointer; text-decoration: none; color: inherit; }
.topbar .brand .logo { font-size: 22px; }
.topbar .brand .title { font-size: 15px; font-weight: 600; }
.topbar .brand .sub { font-size: 12px; color: var(--text-mute); }
.topbar .nav { display: flex; gap: 4px; flex-wrap: wrap; padding: 0 0 0 8px; }
.topbar .nav a {
  padding: 7px 12px; border-radius: 8px; font-size: 13px; color: var(--text-dim);
  text-decoration: none; transition: all .15s; border: 1px solid transparent; white-space: nowrap;
}
.topbar .nav a:hover { color: var(--text); background: var(--bg-card); }
.topbar .nav a.active { color: var(--accent); background: var(--bg-card); border-color: var(--border); }
.topbar .spacer { flex: 1; }
.topbar .ext { font-size: 12px; color: var(--text-mute); }

/* ===== 主区域 ===== */
.main { flex: 1; overflow: auto; }
.tool-page { max-width: 1400px; margin: 0 auto; padding: 20px; }
.tool-head { margin-bottom: 16px; }
.tool-head h2 { margin: 0 0 4px; font-size: 18px; font-weight: 600; }
.tool-head .desc { color: var(--text-mute); font-size: 13px; }

/* ===== 工具箱首页 ===== */
.home-hero { padding: 48px 20px 24px; text-align: center; }
.home-hero h1 { margin: 0 0 8px; font-size: 26px; font-weight: 700; }
.home-hero p { color: var(--text-mute); font-size: 14px; max-width: 640px; margin: 0 auto; }
.tool-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px; max-width: 1200px; margin: 24px auto; padding: 0 20px 40px;
}
.tool-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; transition: all .18s; cursor: pointer;
}
.tool-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.tool-card .icon { font-size: 26px; margin-bottom: 8px; }
.tool-card .name { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.tool-card .summary { color: var(--text-mute); font-size: 12px; line-height: 1.5; }

/* ===== 通用工具组件 ===== */
.btn {
  background: var(--bg-card); border: 1px solid var(--border); color: var(--text-dim);
  padding: 6px 12px; border-radius: 8px; font-size: 13px; cursor: pointer; transition: all .15s;
  display: inline-flex; align-items: center; gap: 6px;
}
.btn:hover { color: var(--text); border-color: var(--accent); }
.btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.status { font-size: 12px; padding: 3px 9px; border-radius: 20px; border: 1px solid var(--border); color: var(--text-mute); }
.status.ok { color: var(--ok); border-color: var(--ok); }
.status.err { color: var(--error); border-color: var(--error); }
.status.load { color: var(--accent); border-color: var(--accent); }
.status.warn { color: var(--warn); border-color: var(--warn); }
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--bg-card); color: var(--text); border: 1px solid var(--border);
  padding: 8px 16px; border-radius: 8px; box-shadow: 0 6px 20px rgba(0,0,0,.3); font-size: 13px;
  opacity: 0; transition: opacity .2s, transform .2s; pointer-events: none; z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(-4px); }
.spinner { width: 12px; height: 12px; border: 2px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin .7s linear infinite; display: none; }
.btn.loading .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* 双栏布局（输入/输出） */
.dual { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border-soft); border: 1px solid var(--border-soft); border-radius: var(--radius); overflow: hidden; height: calc(100vh - 200px); min-height: 360px; }
.pane { background: var(--bg-soft); display: flex; flex-direction: column; min-width: 0; overflow: hidden; }
.pane-head { padding: 8px 14px; font-size: 12px; font-weight: 600; color: var(--text-mute); text-transform: uppercase; letter-spacing: .05em; border-bottom: 1px solid var(--border-soft); display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.pane-head .hint { font-weight: 400; text-transform: none; letter-spacing: 0; }
textarea.code-input { flex: 1; width: 100%; border: 0; outline: 0; resize: none; padding: 14px; background: transparent; color: var(--text); font-family: "JetBrains Mono","Fira Code","SF Mono",Consolas,Menlo,monospace; font-size: 13px; line-height: 1.65; tab-size: 2; }
pre.code-output { flex: 1; overflow: auto; padding: 14px; font-family: "JetBrains Mono","Fira Code","SF Mono",Consolas,Menlo,monospace; font-size: 13px; line-height: 1.75; white-space: pre; margin: 0; }
.empty { color: var(--text-mute); font-style: italic; padding: 40px 16px; text-align: center; }

/* JSON 高亮 token */
.j-key { color: var(--key); } .j-string { color: var(--string); } .j-number { color: var(--number); }
.j-bool { color: var(--boolean); } .j-null { color: var(--null); } .j-punct { color: var(--punct); }
.j-comment { color: var(--comment); background: var(--comment-bg); padding: 1px 6px; margin-left: 8px; border-radius: 4px; font-style: italic; white-space: pre-wrap; }

/* 单栏表单布局 */
.form-card { background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; max-width: 720px; }
.form-row { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.form-row label { width: 110px; font-size: 13px; color: var(--text-dim); flex-shrink: 0; }
.form-row input, .form-row select { flex: 1; min-width: 160px; background: var(--bg); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 8px 10px; font-size: 13px; font-family: inherit; outline: none; }
.form-row input:focus, .form-row select:focus { border-color: var(--accent); }
.form-result { margin-top: 18px; padding: 16px; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; font-family: "JetBrains Mono","Fira Code",monospace; font-size: 13px; white-space: pre-wrap; min-height: 48px; }

@media (max-width: 760px) {
  .dual { grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; height: calc(100vh - 240px); }
  .topbar .nav { width: 100%; overflow-x: auto; }
}