:root {
  color-scheme: light dark;
  --bg: #f1f5f9;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --primary: #4f46e5;
  --primary-h: #4338ca;
  --danger: #dc2626;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120; --card: #111a2e; --border: #1e293b;
    --text: #e2e8f0; --muted: #94a3b8; --primary: #6366f1; --primary-h: #818cf8;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.5;
}
.hidden { display: none !important; }
.center { text-align: center; }
.ta-r { text-align: right; }
.muted { color: var(--muted); }
.small { font-size: 12px; font-weight: 400; }

/* 登录 */
#login { min-height: 100vh; display: grid; place-items: center; }
.login-card { width: min(360px, 92vw); display: grid; gap: 14px; }
.logo { font-size: 22px; font-weight: 700; }

/* 顶栏 */
.topbar {
  position: sticky; top: 0; z-index: 10; display: flex; justify-content: space-between;
  align-items: center; padding: 14px 22px; background: var(--card);
  border-bottom: 1px solid var(--border);
}
.wrap { max-width: 920px; margin: 0 auto; padding: 22px; display: grid; gap: 22px; }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: 0 6px 24px rgba(2, 6, 23, 0.05);
}
.card h2 { margin: 0 0 14px; font-size: 16px; }
.row-between { display: flex; justify-content: space-between; align-items: center; }

/* 输入 / 按钮 */
input, select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 9px;
  background: var(--bg); color: var(--text); font-size: 14px;
}
.btn {
  padding: 10px 16px; border-radius: 9px; border: 0; cursor: pointer;
  font-size: 14px; font-weight: 600; background: #e2e8f0; color: var(--text);
  transition: .15s;
}
.btn:hover { opacity: .88; }
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-h); }
.btn.ghost { background: transparent; border: 1px solid var(--border); }
.btn.small { padding: 6px 10px; font-size: 12px; }
.btn.link { background: none; color: var(--primary); padding: 4px 6px; }
.btn.danger { background: none; color: var(--danger); padding: 4px 6px; }

/* 上传拖拽区 */
.drop {
  display: block; border: 2px dashed var(--border); border-radius: 12px; cursor: pointer;
  padding: 28px; text-align: center; color: var(--muted); transition: .15s;
  position: relative;
}
/* file input 透明铺满拖拽区：点击直接命中原生 input，由浏览器原生弹文件选择框，
   不依赖 JS 的 input.click()（它受用户激活限制，且 preventDefault 会拦掉原生弹框）。
   拖拽事件会从 input 冒泡到 #drop，drag/drop 逻辑照常工作。 */
#fileInput {
  position: absolute; inset: 0; width: 100%; height: 100%;
  margin: 0; padding: 0; border: 0; background: transparent;
  opacity: 0; cursor: pointer; z-index: 2;
}
.drop:hover, .drop.drag { border-color: var(--primary); color: var(--text); background: rgba(99,102,241,.06); }
.drop-icon { font-size: 30px; margin-bottom: 6px; }
.progress { margin-top: 14px; height: 8px; background: var(--border); border-radius: 99px; overflow: hidden; }
.progress span { display: block; height: 100%; width: 0; background: var(--primary); transition: width .2s; }

/* 表格 */
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
td .fname { word-break: break-all; }
.link-cell { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 12px; color: var(--muted); word-break: break-all; }
.pill { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 12px; background: #eef2ff; color: #4f46e5; }
.pill.off { background: #fee2e2; color: #b91c1c; }

/* 弹窗 */
.modal { position: fixed; inset: 0; background: rgba(2,6,23,.5); display: grid; place-items: center; z-index: 50; padding: 16px; }
.modal-card { width: min(440px, 94vw); display: grid; gap: 14px; }
.field { display: grid; gap: 6px; }
.field label { font-size: 13px; color: var(--muted); font-weight: 600; }
.share-result { display: flex; gap: 8px; align-items: center; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 99px;
  font-size: 14px; z-index: 60; box-shadow: 0 8px 30px rgba(0,0,0,.2);
}