* { box-sizing: border-box; margin: 0; padding: 0; }

/* ---------- 主题变量（深色为默认，浅色通过 [data-theme="light"] 切换） ---------- */
:root {
  --bg: #0f1115;
  --card: #161a22;
  --border: #262c38;
  --border2: #2c3442;
  --text: #e6e8ee;
  --muted: #9aa0ab;
  --dim: #5b6472;
  --soft: #b8c0cf;
  --accent: #4a7bff;
  --primary-bg: #2b4a8f;
  --primary-border: #3a5db8;
  --ok: #4ade80;
  --err: #f87171;
  --warn: #fbbf24;
  --me: #7cb0ff;
  --btn-bg: #1d2430;
  --btn-border: #2c3442;
  --input-bg: #0f1115;
  --msg-bg: #0f1115;
  --overlay: rgba(10, 12, 16, 0.8);
  --bar-grad: linear-gradient(90deg, #2b4a8f, #4a7bff);
}

[data-theme="light"] {
  --bg: #f5f6f8;
  --card: #ffffff;
  --border: #d9dee7;
  --border2: #c6cdd9;
  --text: #1c2430;
  --muted: #5b6472;
  --dim: #8a93a3;
  --soft: #3c4656;
  --accent: #2563eb;
  --primary-bg: #2563eb;
  --primary-border: #1d4ed8;
  --ok: #16a34a;
  --err: #dc2626;
  --warn: #b45309;
  --me: #1d4ed8;
  --btn-bg: #eef1f6;
  --btn-border: #c6cdd9;
  --input-bg: #ffffff;
  --msg-bg: #fafbfc;
  --overlay: rgba(28, 36, 48, 0.5);
  --bar-grad: linear-gradient(90deg, #2563eb, #60a5fa);
}

body {
  font-family: system-ui, "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 32px 16px;
}

#app { width: 100%; max-width: 680px; }

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

h1 { font-size: 20px; font-weight: 600; }

.head-right { display: flex; align-items: center; gap: 8px; }

.pill {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border2);
  color: var(--muted);
  white-space: nowrap;
}
.pill.online  { color: var(--ok); border-color: var(--ok); }
.pill.offline { color: var(--err); border-color: var(--err); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.or  { color: var(--muted); }
.hint { color: var(--muted); font-size: 13px; margin-top: 12px; line-height: 1.6; }
#file-input { max-width: 200px; }

.hidden { display: none !important; }

.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border2);
  border-radius: 8px;
  color: var(--muted);
  padding: 10px;
  font-size: 14px;
  cursor: pointer;
}
.tab.active { background: var(--primary-bg); border-color: var(--primary-border); color: #fff; }

input {
  background: var(--input-bg);
  border: 1px solid var(--border2);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
  flex: 1;
  min-width: 140px;
}
input:focus { outline: none; border-color: var(--accent); }
input:disabled { opacity: 0.5; }

button {
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  border-radius: 8px;
  color: var(--text);
  padding: 10px 16px;
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
}
button:hover { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.primary { background: var(--primary-bg); border-color: var(--primary-border); color: #fff; }
button.mini { padding: 4px 10px; font-size: 12px; }
button.danger-ghost { color: var(--err); border-color: var(--err); }
button.ghost { background: transparent; }

.code-big {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: 6px;
  text-align: center;
  color: var(--ok);
  margin: 8px 0;
  word-break: keep-all;
}

.chat-head { display: flex; justify-content: flex-end; gap: 8px; margin-bottom: 10px; }
.row.tools { margin-bottom: 10px; }

.messages {
  background: var(--msg-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  height: 240px;
  overflow-y: auto;
  padding: 12px;
  margin-bottom: 12px;
  font-size: 14px;
}

.msg { margin-bottom: 8px; line-height: 1.5; word-break: break-all; }
.msg .t { color: var(--dim); font-size: 11px; margin-right: 6px; }
.msg .pend { color: var(--warn); font-size: 12px; }
.msg.me     { color: var(--me); }
.msg.peer   { color: var(--text); }
.msg.system { color: var(--muted); font-size: 13px; }

/* 共享文件列表 */
.share {
  margin-top: 14px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.share-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.share-head .tabs { margin-bottom: 0; }
.share-head .tab { padding: 6px 10px; font-size: 12px; }
#share-list .hint { margin-top: 0; }

.sfile {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  background: var(--msg-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 8px;
}
.sfile-main { min-width: 0; flex: 1; }
.sfile-name {
  color: var(--soft);
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sfile-meta { color: var(--dim); font-size: 12px; margin-top: 3px; }

.row.center { justify-content: center; margin-top: 12px; }

/* 传输列表 */
#transfers { margin-top: 16px; }

.tfile {
  background: var(--msg-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 10px;
}

.tfile-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 13px;
}
.tfile-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--soft);
}
.tfile-status { color: var(--ok); font-size: 12px; white-space: nowrap; }

.bar {
  height: 6px;
  background: var(--btn-bg);
  border-radius: 3px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0;
  background: var(--bar-grad);
  transition: width 0.2s;
}

.tfile-meta {
  display: flex;
  gap: 14px;
  margin-top: 6px;
  font-size: 12px;
  color: var(--muted);
}
.tfile-meta .tfile-pct { color: var(--text); }

.tfile-actions { margin-top: 8px; display: flex; gap: 8px; }

/* 页脚 */
.footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--dim);
}
.footer a { color: var(--accent); text-decoration: none; }
.footer .f-note { color: var(--dim); }
.footer button.mini { padding: 4px 12px; }

/* 合规提示与反馈弹窗 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}
.modal {
  background: var(--card);
  border: 1px solid var(--border2);
  border-radius: 12px;
  padding: 24px;
  max-width: 520px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
}
.modal h2 { font-size: 18px; margin-bottom: 12px; }
.modal-body p { font-size: 13px; line-height: 1.7; color: var(--soft); margin-bottom: 10px; }
.modal-body ul { margin: 8px 0 12px 18px; font-size: 13px; color: var(--soft); line-height: 1.7; }
.modal-body a { color: var(--accent); }
.modal-body label { display: block; font-size: 12px; color: var(--muted); margin: 10px 0 4px; }
.modal-body textarea {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--border2);
  border-radius: 8px;
  color: var(--text);
  padding: 10px;
  font-size: 13px;
  resize: vertical;
  font-family: inherit;
}
.modal-body select,
.modal-body input {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--border2);
  border-radius: 8px;
  color: var(--text);
  padding: 8px 10px;
  font-size: 13px;
}
.fb-out {
  margin-top: 12px;
  background: var(--msg-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-size: 12px;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 180px;
  overflow-y: auto;
}
.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  justify-content: flex-end;
  flex-wrap: wrap;
}