/* ════════════════════════════════════════════════════════════════
   MemoryDuel Home — 站点私有样式 (B2 拆分)
   原为 components.css 尾部私有补丁, 已拆出为独立文件, 由 index.html 引用。
   注意: 本文件为站点私有, 不属于 packages/shared-fe 共享真源。
   ════════════════════════════════════════════════════════════════ */

/* 模式切换 (AI vs Online) */
.mode-row {
  display: inline-flex;
  background: var(--card, #fff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: 999px;
  padding: 4px;
  gap: 4px;
}
.mode-btn {
  padding: 8px 18px;
  border: none;
  background: transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--m, #6b7280);
  cursor: pointer;
  transition: all .15s;
}
.mode-btn:hover { color: var(--brand, #4f46e5); }
.mode-btn.on {
  background: var(--brand, #4f46e5);
  color: #fff;
}

/* AI Panel: 分类网格 */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  margin: 16px 0 24px;
}
.cat-card {
  background: var(--card, #fff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--r, 14px);
  padding: 16px 8px;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font: inherit;
  color: inherit;
}
.cat-card:hover {
  transform: translateY(-2px);
  border-color: var(--brand, #4f46e5);
  box-shadow: 0 6px 14px rgba(79, 70, 229, .12);
}
.cat-card.selected {
  border-color: var(--brand, #4f46e5);
  background: rgba(79, 70, 229, .06);
}
.cat-card.locked {
  opacity: .55;
  cursor: not-allowed;
}
.cat-card .cat-icon { font-size: 28px; }
.cat-card .cat-name { font-weight: 700; font-size: 13px; }
.cat-card .cat-count { font-size: 11px; color: var(--m, #6b7280); }

/* AI 动作区 */
.home-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 12px;
}
.home-actions .btn {
  min-width: 180px;
}

/* Online Panel */
.online-mode {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
}
.online-mode h3 {
  margin: 0 0 8px;
  font-size: 18px;
}
.online-mode p {
  color: var(--m, #6b7280);
  margin: 0 0 16px;
  font-size: 14px;
}
.divider {
  display: flex;
  align-items: center;
  margin: 18px 0;
  color: var(--m, #6b7280);
  font-size: 13px;
}
.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--line, #e2e8f0);
}
.divider span {
  padding: 0 12px;
}
.room-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}
.room-row {
  display: flex;
  gap: 8px;
  width: 100%;
  max-width: 360px;
}
.room-input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--r, 10px);
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
  text-align: center;
  font-family: inherit;
}

/* Features grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 18px;
}
.feat-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px;
  background: var(--card, #fff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--r, 14px);
  transition: all .2s;
}
.feat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(0, 0, 0, .06);
}
.feat-card .feat-icon {
  font-size: 28px;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  background: rgba(79, 70, 229, .08);
  border-radius: 10px;
}
.feat-card .feat-txt h3 {
  font-size: 15px;
  margin: 0 0 4px;
  font-weight: 700;
}
.feat-card .feat-txt p {
  font-size: 13px;
  color: var(--m, #6b7280);
  margin: 0;
  line-height: 1.5;
}

/* How steps */
.how-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-top: 18px;
}
.how-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  background: var(--card, #fff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--r, 12px);
}
.how-step .how-no {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  background: var(--brand, #4f46e5);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 14px;
}

/* Pricing / Value grid */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-top: 18px;
}
.pricing-card {
  padding: 18px;
  background: var(--card, #fff);
  border: 1px solid var(--line, #e2e8f0);
  border-radius: var(--r, 14px);
  text-align: center;
}
.pricing-card h3 {
  margin: 0 0 6px;
  font-size: 15px;
}
.pricing-card p {
  margin: 0;
  font-size: 13px;
  color: var(--m, #6b7280);
  line-height: 1.5;
}

/* Footer */
.home-footer {
  margin-top: 60px;
  padding: 32px 0 28px;
  border-top: 1px solid var(--line, #e2e8f0);
  background: var(--card, #fff);
  text-align: center;
}
.home-footer .footer-brands {
  margin-bottom: 10px;
  font-size: 13px;
}
.home-footer .footer-brand a {
  color: var(--m, #6b7280);
  margin: 0 8px;
  text-decoration: none;
  transition: color .15s;
}
.home-footer .footer-brand a:hover { color: var(--brand, #4f46e5); }
.home-footer .footer-copy {
  font-size: 12px;
  color: var(--m, #6b7280);
  margin: 0;
}

/* 按钮通用样式（home 区域） */
.home-section .btn {
  display: inline-block;
  background: var(--brand, #4f46e5);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
  transition: all .15s;
}
.home-section .btn:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(79, 70, 229, .25); }
.home-section .btn-ghost { background: transparent; color: var(--brand, #4f46e5); border: 1px solid currentColor; }
.home-section .btn-ghost:hover { background: rgba(79, 70, 229, .08); }

/* 响应式 */
@media (max-width: 640px) {
  /* cat-grid: auto-fill 原生在 390px 已给 2 列，不要强制 3 列挤压 */
  .cat-card { padding: 12px 6px; }
  .cat-card .cat-icon { font-size: 22px; }
  .features-grid, .pricing-grid { grid-template-columns: 1fr 1fr; }
  .home-actions .btn { width: 100%; }