/* ============================================================
   additions.css — v1.2.0 新增功能的补充样式
   可选筛选区 / 离线提示 / 问题反馈弹窗 / 置顶按钮 / 用户区弹窗 等
   ============================================================ */

/* —— 可选筛选区（排行榜 / 练习记录共用）—— */
.lb-opt-filter {
  display: flex; align-items: flex-end; gap: var(--sp-4);
  padding: var(--sp-3) var(--sp-4); margin-bottom: var(--sp-3);
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--r-md); flex-wrap: wrap;
}
.lof-item { display: flex; flex-direction: column; gap: 6px; }
.lof-label { font-size: 11px; color: var(--text-tertiary); }
.lof-tires { display: flex; gap: 4px; }
.lof-range { display: flex; align-items: center; gap: 6px; }
.range-input {
  width: 70px; padding: 6px 8px; font-size: 12px;
  background: var(--bg-surface-2); border: 1px solid var(--border);
  border-radius: var(--r-xs); color: var(--text-primary); font-family: var(--font-dig);
}
.range-input:focus { outline: none; border-color: var(--border-accent); }

/* —— 排行榜行：操作区 —— */
.lb-row-actions { display: inline-flex; align-items: center; gap: 8px; }
.btn-xs {
  padding: 4px 8px; font-size: 11px; gap: 4px; height: auto;
  background: var(--bg-surface-2); border: 1px solid var(--border);
  border-radius: var(--r-xs); color: var(--text-secondary);
  display: inline-flex; align-items: center; transition: all var(--dur-fast) var(--ease);
}
.btn-xs:hover { background: var(--bg-surface-3); color: var(--text-primary); }
.btn-xs .icon { width: 12px; height: 12px; }

/* —— 离线提示（8.7）—— */
.offline-tip {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: var(--sp-12) var(--sp-6); text-align: center;
  background: var(--bg-surface); border: 1px solid var(--border);
  border-radius: var(--r-md); margin-top: var(--sp-5);
}
.offline-icon { color: var(--warning); opacity: 0.7; margin-bottom: var(--sp-3); }
.offline-icon .icon { width: 48px; height: 48px; }
.offline-title { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.offline-desc { font-size: 12px; color: var(--text-secondary); max-width: 360px; line-height: 1.6; margin-bottom: var(--sp-4); }
.link { color: var(--accent); cursor: pointer; }
.link:hover { text-decoration: underline; }

/* —— 问题反馈弹窗（5.4.1）—— */
.fb-field { margin-bottom: var(--sp-3); }
.fb-label { display: block; font-size: 12px; font-weight: 600; margin-bottom: 6px; }
.fb-cats { display: flex; flex-wrap: wrap; gap: 4px; }
.fb-textarea {
  width: 100%; padding: 10px; font-size: 12.5px; line-height: 1.6;
  background: var(--bg-surface-2); border: 1px solid var(--border);
  border-radius: var(--r-sm); color: var(--text-primary); resize: vertical;
  font-family: var(--font-sans); box-sizing: border-box;
}
.fb-textarea:focus { outline: none; border-color: var(--border-accent); }
.fb-input {
  width: 100%; padding: 8px 10px; font-size: 12.5px;
  background: var(--bg-surface-2); border: 1px solid var(--border);
  border-radius: var(--r-sm); color: var(--text-primary); box-sizing: border-box;
}
.fb-input:focus { outline: none; border-color: var(--border-accent); }
.fb-toggle {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-2) 0; font-size: 12.5px;
}
.fb-item { padding: var(--sp-3); background: var(--bg-surface-2); border-radius: var(--r-sm); margin-bottom: var(--sp-2); }
.fb-item-head { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.fb-id { font-size: 11px; color: var(--accent); }
.fb-item-desc { font-size: 12.5px; line-height: 1.5; margin-bottom: 4px; }

/* —— 浮窗置顶按钮态（6.1）—— */
.ov-mini-btn#ov-pin.on { color: var(--accent); }
.ov-mini-btn#ov-pin .icon { width: 14px; height: 14px; }

/* —— 用户区未登录态 —— */
.nav-user { cursor: pointer; }
.nav-user:hover { opacity: 0.85; }

/* ============================================================
   首次启动引导（7.2 / 7.4）
   ============================================================ */
.ob-mask {
  position: fixed; inset: 0; z-index: 8000;
  background: rgba(8,10,13,0.85); backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  animation: ob-fade var(--dur) var(--ease);
}
@keyframes ob-fade { from { opacity: 0; } to { opacity: 1; } }
.ob-hide .ob-mask { opacity: 0; pointer-events: none; transition: opacity var(--dur) var(--ease); }

.ob-card {
  width: 560px; max-width: 92vw; max-height: 90vh; overflow: auto;
  background: var(--bg-surface); border: 1px solid var(--border-strong);
  border-radius: var(--r-xl); padding: var(--sp-6) var(--sp-8);
  box-shadow: var(--shadow-lg);
  animation: ob-up var(--dur) var(--ease-out);
}
@keyframes ob-up { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

.ob-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--sp-6); }
.ob-steps { display: flex; gap: 8px; }
.ob-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--bg-surface-3); transition: all var(--dur) var(--ease); }
.ob-dot.active { background: var(--accent); width: 24px; border-radius: 4px; }
.ob-dot.done { background: var(--accent); opacity: 0.5; }
.ob-skip { font-size: 12px; color: var(--text-tertiary); cursor: pointer; background: none; border: none; }
.ob-skip:hover { color: var(--text-secondary); }

.ob-content { text-align: center; min-height: 220px; display: flex; flex-direction: column; align-items: center; }
.ob-icon { color: var(--accent); margin-bottom: var(--sp-4); }
.ob-icon .icon { width: 48px; height: 48px; }
.ob-title { font-size: 20px; font-weight: 700; margin: 0 0 6px; }
.ob-sub { font-size: 12px; color: var(--text-tertiary); margin-bottom: var(--sp-5); letter-spacing: 0.04em; }
.ob-body { width: 100%; text-align: left; }

/* hero 步 */
.ob-hero { text-align: center; }
.ob-hero-logo {
  width: 72px; height: 72px; border-radius: 18px; margin: 0 auto var(--sp-4);
  background: linear-gradient(135deg, var(--accent), #ff8a3d);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 36px; color: #fff;
  box-shadow: 0 12px 40px var(--accent-glow);
}
.ob-hero-sub { font-size: 13px; color: var(--text-secondary); line-height: 1.7; max-width: 380px; margin: 0 auto; }

/* 功能网格 */
.ob-feat-grid { display: grid; gap: var(--sp-3); }
.ob-feat-grid.ob-feat-3 { grid-template-columns: repeat(3, 1fr); }
.ob-feat {
  display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: var(--sp-4); background: var(--bg-surface-2); border-radius: var(--r-md);
  border: 1px solid var(--border);
}
.ob-feat-ic { color: var(--text-secondary); margin-bottom: var(--sp-2); }
.ob-feat-ic.accent { color: var(--accent); }
.ob-feat-ic .icon { width: 28px; height: 28px; }
.ob-feat-name { font-size: 13px; font-weight: 600; margin-bottom: 4px; }
.ob-feat-desc { font-size: 11.5px; color: var(--text-tertiary); line-height: 1.5; }
@media (max-width: 600px) { .ob-feat-grid.ob-feat-3 { grid-template-columns: 1fr; } }

/* 设备列表 */
.ob-dev-list { display: flex; flex-direction: column; gap: 6px; }
.ob-dev-row {
  display: flex; align-items: center; gap: 10px; padding: 10px var(--sp-3);
  background: var(--bg-surface-2); border-radius: var(--r-sm); border-left: 3px solid var(--success);
  font-size: 12.5px;
}
.ob-dev-row.warn { border-left-color: var(--warning); }
.ob-dev-row .ob-dev-ic { color: var(--text-tertiary); display: inline-flex; }
.ob-dev-status { margin-left: auto; font-size: 11px; color: var(--text-tertiary); text-align: right; }

/* 隐私同意 */
.ob-privacy { padding: var(--sp-2) 0; }
.ob-priv-text { font-size: 13px; margin: 0 0 8px; }
.ob-priv-links { font-size: 12.5px; margin-bottom: var(--sp-4); display: flex; gap: 8px; align-items: center; }
.ob-priv-agree {
  display: flex; align-items: center; gap: 10px; padding: var(--sp-3);
  background: var(--bg-surface-2); border-radius: var(--r-sm); cursor: pointer; margin-bottom: var(--sp-3);
  font-size: 12.5px;
}
.ob-check {
  width: 20px; height: 20px; border-radius: 5px; border: 2px solid var(--border-strong);
  display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0;
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.ob-check.checked-only { background: transparent; border-color: var(--text-tertiary); color: transparent; }
.ob-improve {
  display: flex; align-items: center; gap: var(--sp-3); padding: var(--sp-3);
  background: var(--bg-surface-2); border-radius: var(--r-sm);
}
.ob-improve-main { flex: 1; }
.ob-improve-name { font-size: 13px; font-weight: 600; margin-bottom: 3px; }
.ob-improve-desc { font-size: 11px; color: var(--text-tertiary); line-height: 1.5; }

.ob-foot { display: flex; align-items: center; gap: var(--sp-2); margin-top: var(--sp-6); }