:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-d: #1d4ed8;
  --dark: #0f172a;
  --border: #e5e7eb;
  --ok: #16a34a;
  --err: #dc2626;
  --chip: #eef2ff;
  --chip-t: #4338ca;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

.container {
  max-width: 560px;
  margin: 0 auto;
  padding: 16px;
}

.hidden { display: none !important; }

/* 卡片 */
.card {
  background: var(--card);
  border-radius: 14px;
  padding: 22px 18px;
  box-shadow: 0 1px 3px rgba(0,0,0,.06), 0 8px 24px rgba(0,0,0,.04);
  margin-top: 24px;
}

.brand {
  margin: 0 0 4px;
  font-size: 22px;
  font-weight: 700;
  text-align: center;
}
.sub {
  margin: 0 0 18px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

/* 输入 */
.field {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 16px;
  margin-bottom: 12px;
  background: #fff;
  color: var(--text);
  outline: none;
  -webkit-appearance: none;
}
.field:focus { border-color: var(--primary); }
.area { resize: vertical; min-height: 96px; font-family: inherit; }

/* 按钮 */
.btn {
  width: 100%;
  border: none;
  border-radius: 10px;
  padding: 13px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:active { background: var(--primary-d); }
.btn.dark { background: var(--dark); color: #fff; }
.btn.link {
  width: auto;
  background: transparent;
  color: var(--muted);
  font-weight: 500;
  padding: 6px 8px;
  font-size: 14px;
}

.err { color: var(--err); font-size: 14px; text-align: center; min-height: 18px; margin: 8px 0 0; }
.ok { color: var(--ok); font-size: 14px; text-align: center; min-height: 18px; margin: 10px 0 0; }

/* 顶栏 */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 14px;
}
.dev { font-weight: 600; font-size: 15px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.topbar-actions { display: flex; gap: 4px; flex-shrink: 0; }
.rename-input { margin: 0; padding: 6px 8px; font-size: 14px; max-width: 160px; }

/* Tabs */
.tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.tab {
  flex: 1;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  padding: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
}
.tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 输入区 */
.composer { margin-bottom: 14px; }

/* 在线 */
.online {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.chip {
  background: var(--chip);
  color: var(--chip-t);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
}

/* 列表 */
.list { display: flex; flex-direction: column; gap: 10px; }
.clip {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
}
.ct {
  margin: 0 0 8px;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 15px;
  max-height: 240px;
  overflow: auto;
}
.meta {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}
.actions { display: flex; gap: 8px; }
.actions button {
  flex: 1;
  border: none;
  border-radius: 8px;
  padding: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.copy { background: var(--primary); color: #fff; }
.del { background: #fef2f2; color: var(--err); }

.empty { text-align: center; color: var(--muted); padding: 30px 0; }

/* 后台 */
.stats {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
}
.stat {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
}
.stat b { display: block; font-size: 24px; }
.stat span { font-size: 13px; color: var(--muted); }
.lbl { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
.hint { text-align: center; font-size: 13px; color: var(--muted); margin-top: 16px; }
.hint a { color: var(--primary); }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1020;
    --card: #141a2e;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --border: #2a3350;
    --chip: #1e2547;
    --chip-t: #a5b4fc;
  }
  .field { background: #0f1526; }
  .tab { background: #0f1526; }
  .del { background: #3a1d22; }
}