/* ===== 老年友好 UI：大字体、高对比、大按钮 ===== */
/* 字号用 rem，根字号由 JS 按设置调节（默认 html=16px，正文=1.25rem=20px） */
:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --soft: #eef1f4;
  --pre-bg: #f0f2f5;
  --status-bg: #e8f0fe;
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --topbar-bg: #1a73e8;
  --text: #1a1a1a;
  --text-dim: #555;
  --danger: #d93025;
  --border: #d0d5dd;
  --btn-h: 52px;
  --radius: 14px;
}

[data-theme="dark"] {
  --bg: #121417;
  --card: #1e2126;
  --soft: #2a2e35;
  --pre-bg: #26292f;
  --status-bg: #1c2a45;
  --primary: #5b93f0;
  --primary-dark: #8db4f2;
  --topbar-bg: #233048;
  --text: #e8eaed;
  --text-dim: #a8adb5;
  --danger: #f28b82;
  --border: #3c4046;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html { font-size: 16px; }   /* JS 按用户设置覆盖 */

html, body {
  margin: 0; padding: 0; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-size: 1.25rem;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.7;
}

.hidden { display: none !important; }

.view { display: flex; flex-direction: column; height: 100vh; height: 100dvh; }

/* 顶栏（紧凑） */
.topbar {
  display: flex; align-items: center; gap: 6px;
  background: var(--topbar-bg); color: #fff;
  padding: 6px 8px;
  padding-top: calc(6px + env(safe-area-inset-top));
  flex-shrink: 0;
}
.topbar-title { font-size: 1.3rem; font-weight: 700; flex: 1; }
.icon-btn {
  background: rgba(255,255,255,.22); border: none; color: #fff;
  font-size: 1.35rem; width: 46px; height: 46px; border-radius: 10px;
  flex-shrink: 0;
}
.icon-btn:active { background: rgba(255,255,255,.35); }
.icon-btn.off { opacity: .45; }

/* 安装引导条 */
.install-banner {
  background: #f0a500; color: #1a1a1a;
  padding: 8px 12px; font-size: 1rem; font-weight: 600;
  display: flex; align-items: center; gap: 8px; flex-shrink: 0;
}
.install-banner .banner-text { flex: 1; }
.install-banner button {
  border: none; background: rgba(0,0,0,.15); border-radius: 8px;
  font-size: 0.95rem; padding: 6px 10px; flex-shrink: 0;
}

/* 消息区 */
.messages {
  flex: 1; overflow-y: auto; padding: 10px 10px;
  display: flex; flex-direction: column; gap: 10px;
}
.msg {
  max-width: 92%; padding: 10px 14px; border-radius: var(--radius);
  white-space: pre-wrap; word-break: break-word;
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
}
.msg.user {
  align-self: flex-end;
  background: var(--primary); color: #fff;
  border-bottom-right-radius: 4px;
}
.msg.assistant {
  align-self: flex-start;
  background: var(--card);
  border-bottom-left-radius: 4px;
}
.msg img.chat-img { max-width: 100%; border-radius: 10px; display: block; margin-top: 8px; }
.msg .thinking {
  color: var(--text-dim); font-size: 1.05rem; border-left: 4px solid var(--border);
  padding-left: 10px; margin-bottom: 8px;
}
.msg details { margin-top: 8px; font-size: 1.05rem; }
.msg summary { color: var(--primary); cursor: pointer; padding: 6px 0; }
.msg pre {
  background: var(--pre-bg); padding: 10px; border-radius: 8px;
  overflow-x: auto; font-size: 1rem; white-space: pre-wrap;
}
/* 真表格：可横向滑动，不用挤 */
.table-wrap { overflow-x: auto; margin: 8px 0; }
.msg table { border-collapse: collapse; font-size: 0.95rem; min-width: 60%; }
.msg th, .msg td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
.msg th { background: var(--soft); font-weight: 700; }
.msg a { color: var(--primary); word-break: break-all; }

/* 快捷场景 */
.scene-chips {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 6px 10px; flex-shrink: 0;
}
.chip {
  font-size: 1.1rem; padding: 9px 14px;
  background: var(--card); border: 2px solid var(--primary);
  color: var(--primary-dark); border-radius: 999px; font-weight: 600;
}
.chip:active { background: var(--primary); color: #fff; }

/* 状态行 */
.status-line {
  padding: 8px 14px; font-size: 1.15rem; font-weight: 600;
  color: var(--primary-dark); background: var(--status-bg);
  flex-shrink: 0;
}

/* 待发送图片（多张，横向滑动） */
.pending-image {
  display: flex; gap: 10px; overflow-x: auto;
  padding: 8px 10px; flex-shrink: 0;
}
.pending-thumb { position: relative; flex-shrink: 0; }
.pending-thumb img { max-height: 110px; border-radius: 10px; border: 2px solid var(--border); display: block; }
.remove-img {
  position: absolute; top: -8px; right: -8px;
  background: var(--danger); color: #fff; border: none;
  width: 30px; height: 30px; border-radius: 50%; font-size: 1rem;
}

/* 输入栏 */
.input-bar {
  display: flex; align-items: flex-end; gap: 6px;
  padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
  background: var(--card); border-top: 1px solid var(--border);
  flex-shrink: 0;
}
#inputBox {
  flex: 1; min-width: 0;
  font-size: 1.2rem; padding: 10px 12px;
  border: 2px solid var(--border); border-radius: var(--radius);
  resize: none; max-height: 140px; font-family: inherit; line-height: 1.5;
  background: var(--card); color: var(--text);
}
#inputBox:focus { outline: none; border-color: var(--primary); }
.big-btn {
  height: var(--btn-h); min-width: var(--btn-h);
  font-size: 1.4rem; border: none; border-radius: var(--radius);
  flex-shrink: 0; padding: 0;
}
.tool-btn { background: var(--soft); }
.tool-btn:active, .tool-btn.recording { background: #ffd7d3; }
.send-btn { background: var(--primary); color: #fff; font-weight: 700; font-size: 1.2rem; padding: 0 16px; }
.send-btn:active { background: var(--primary-dark); }
.send-btn:disabled { opacity: .5; }
.send-btn.stop { background: var(--danger); }

/* 设置页 */
.settings-body { flex: 1; overflow-y: auto; padding: 14px; }
.set-group {
  background: var(--card); border-radius: var(--radius);
  padding: 16px; margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.set-group h2 { font-size: 1.4rem; margin: 0 0 12px; color: var(--primary-dark); }
.set-group label { display: block; font-size: 1.15rem; margin-bottom: 12px; color: var(--text-dim); }
.set-group input[type="text"], .set-group input[type="password"], .set-group input:not([type]),
.set-group input[type="time"],
.set-group select, .set-group textarea {
  display: block; width: 100%; margin-top: 6px;
  font-size: 1.25rem; padding: 12px; border: 2px solid var(--border);
  border-radius: 10px; font-family: inherit; color: var(--text);
  background: var(--card);
}
.switch-row { display: flex !important; align-items: center; gap: 12px; color: var(--text) !important; }
.switch-row input[type="checkbox"] { width: 30px; height: 30px; flex-shrink: 0; }
.set-btn {
  font-size: 1.25rem; padding: 12px 20px; margin: 6px 8px 6px 0;
  border: 2px solid var(--primary); color: var(--primary-dark);
  background: var(--card); border-radius: 10px; font-weight: 600;
}
.set-btn.primary { background: var(--primary); color: #fff; }
.set-btn.danger { border-color: var(--danger); color: var(--danger); }
.set-btn:active { opacity: .7; }
.set-btn:disabled { opacity: .5; }
.hint { font-size: 1.05rem; color: var(--text-dim); }
.qr-box { text-align: center; padding: 12px 0; }
.qr-box img { width: 260px; height: 260px; }

/* 字号滑块 */
.font-slider-row { display: flex; align-items: center; gap: 12px; }
.font-slider-row input[type="range"] { flex: 1; height: 40px; }
.font-preview {
  margin-top: 8px; padding: 10px 14px; border: 2px dashed var(--border);
  border-radius: 10px; color: var(--text);
}

/* 对话列表抽屉 */
.drawer-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 90;
}
.drawer {
  position: fixed; top: 0; left: 0; bottom: 0; width: 78%; max-width: 360px;
  background: var(--card); z-index: 91; display: flex; flex-direction: column;
  padding-top: env(safe-area-inset-top);
  box-shadow: 2px 0 12px rgba(0,0,0,.2);
}
.drawer-btns { display: flex; gap: 10px; margin: 14px; flex-shrink: 0; }
.newchat-btn {
  flex: 1; padding: 14px 6px; font-size: 1.3rem; font-weight: 700;
  background: var(--primary); color: #fff; border: none; border-radius: var(--radius);
}
.newchat-btn:active { background: var(--primary-dark); }
.newchat-btn.fav-btn { background: #f0a500; }
.newchat-btn.fav-btn:active { background: #c78a00; }
.newchat-btn.fav-btn.on { outline: 3px solid var(--primary-dark); }
.conv-list { flex: 1; overflow-y: auto; padding: 0 10px 14px; }
.conv-item {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 10px; border-radius: 10px; font-size: 1.25rem;
}
.conv-item:active { background: var(--soft); }
.conv-item.active { background: var(--status-bg); }
.conv-title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-title.fav::before { content: '⭐ '; }
.conv-date { font-size: 0.95rem; color: var(--text-dim); flex-shrink: 0; }
.conv-op {
  border: none; background: none; font-size: 1.25rem; padding: 6px; flex-shrink: 0;
  color: var(--text);
}

/* 模型名快捷选择（datalist 在很多浏览器支持差，改成可点的 chips） */
.model-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.model-chip {
  font-size: 0.95rem; padding: 8px 12px; border-radius: 999px;
  background: var(--soft); color: var(--text); border: 1px solid var(--border);
}
.model-chip:active { background: var(--primary); color: #fff; }

/* 检测结果 */
.diag-result { margin-top: 12px; font-size: 1.1rem; }
.diag-item { padding: 10px 0; border-top: 1px solid var(--border); }
.diag-item .raw { font-size: 0.9rem; color: var(--text-dim); word-break: break-all; white-space: pre-wrap; }

/* 扫码浮层 */
.scan-overlay {
  position: fixed; inset: 0; background: #000; z-index: 100;
  display: flex; flex-direction: column;
}
.scan-overlay video { flex: 1; width: 100%; object-fit: cover; }
.scan-overlay .scan-tip {
  color: #fff; text-align: center; padding: 18px; font-size: 1.2rem;
}
.scan-overlay .scan-close {
  position: absolute; top: calc(14px + env(safe-area-inset-top)); right: 14px;
  background: rgba(255,255,255,.25); color: #fff; border: none;
  font-size: 1.3rem; width: 52px; height: 52px; border-radius: 50%;
}

/* 首次引导弹窗 */
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 110;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal-card {
  background: var(--card); border-radius: var(--radius);
  padding: 22px 18px; max-width: 480px; width: 100%;
  max-height: 85vh; max-height: 85dvh; overflow-y: auto;
  text-align: center;
}
.modal-card h2 { margin: 0 0 10px; font-size: 1.5rem; color: var(--primary-dark); }
.modal-card p { font-size: 1.15rem; }
.modal-card a { color: var(--primary); }
.modal-btn {
  display: block; width: 100%; margin: 12px 0;
  padding: 16px; font-size: 1.25rem; font-weight: 700;
  background: var(--primary); color: #fff; border: none; border-radius: var(--radius);
}
.modal-btn:active { opacity: .75; }
.modal-btn-dim { background: var(--soft); color: var(--text); font-weight: 400; font-size: 1.05rem; }
.modal-sub { font-size: 0.95rem; font-weight: 400; opacity: .85; }

/* 快捷按钮建议条 */
.scene-suggest {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 12px; font-size: 1.05rem;
  background: var(--status-bg); color: var(--text);
  flex-shrink: 0;
}
.scene-suggest .suggest-text { flex: 1; }
.scene-suggest button {
  border: 2px solid var(--primary); background: var(--card); color: var(--primary-dark);
  border-radius: 8px; font-size: 1rem; padding: 6px 14px; flex-shrink: 0; font-weight: 600;
}

/* 快捷按钮编辑项 */
.scene-edit {
  border-top: 1px solid var(--border); padding: 12px 0;
}
.scene-edit .scene-edit-row { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.scene-edit input[type="text"].scene-label { width: 110px; flex-shrink: 0; }
.scene-edit input[type="text"].scene-icon { width: 64px; flex-shrink: 0; }
.scene-edit textarea { font-size: 1rem !important; }