/* ============================================================
   找相同 — 样式（Chrome 61 基线层）
   主题：专注力子系列（舒尔特方格同款）· 清爽蓝绿
   （背景 #f5f7fa / 主色 #2f6feb / 成功绿 #12b76a / 错误红 #f04438）
   约束：
   - 无 flex gap / aspect-ratio / clamp() / inset / 逻辑属性 / :has / dvh
   - 动画双写 @-webkit-keyframes + @keyframes；温和（<=400ms，无频闪）
   - flex 三重前缀（-webkit-box / -webkit-flex / flex）；子项 min-width:0
   - 正方形候选卡：width 与 padding-bottom 同百分比（无 gap，内层 inset）
   - 安全区 env(safe-area-inset-*) 组合；按钮 hit area >= 48x48
   ============================================================ */

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

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: #f5f7fa;
  color: #1f2329;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-flex-direction: column;
  flex-direction: column;
  height: 100vh;
  height: calc(var(--app-height, 100vh));
  overflow: hidden;
}

/* ---------- 三段式骨架 ---------- */

.app-header {
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  flex: 0 0 auto;
  padding-top: var(--safe-area-inset-top, env(safe-area-inset-top, 0px));
  background: #ffffff;
  border-bottom: 1px solid #e5e6eb;
}

.header-brand {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  padding: 8px 16px;
}

.header-icon {
  width: 30px;
  height: 30px;
  margin-right: 8px;
  border-radius: 7px;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  flex: 0 0 auto;
}

.header-title { font-size: 17px; font-weight: 700; color: #1f2329; }

.header-ver {
  margin-left: 6px;
  font-size: 10px;
  color: #9db4c8;
}

.app-main {
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 auto;
  flex: 1 1 auto;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.app-footer {
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  flex: 0 0 auto;
  padding: 6px 16px calc(8px + var(--safe-area-inset-bottom, 0px));
  text-align: center;
}

.view {
  max-width: 480px;
  margin: 0 auto;
  padding: 6px 16px 20px;
  width: 100%;
  min-width: 0;
}

/* ---------- 顶栏 ---------- */

.topbar {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  margin-bottom: 8px;
  min-height: 40px;
}

.topbar .level-title {
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 auto;
  flex: 1 1 auto;
  text-align: center;
  font-size: 16px;
  font-weight: 700;
  color: #1f2329;
  min-width: 0;
}

.top-timer {
  font-size: 13px;
  font-weight: 700;
  color: #e76f51;
  min-width: 58px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.btn-ghost-sm {
  padding: 8px 14px;
  min-height: 36px;
  border: none;
  border-radius: 10px;
  background: #e8f0fe;
  color: #2f6feb;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.btn-ghost-sm:active { background: #d6e6fd; }

/* ---------- 轮次指示 ---------- */

.round-indicator {
  text-align: center;
  font-size: 15px;
  font-weight: 800;
  color: #2f6feb;
  margin-bottom: 8px;
}

/* ---------- 目标大卡 ---------- */

.target-section { margin-bottom: 12px; }

.section-label {
  text-align: center;
  font-size: 12px;
  color: #8a919f;
  margin-bottom: 6px;
}

.target-card {
  background: #ffffff;
  border-radius: 14px;
  padding: 8px 10px 10px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(47, 111, 235, 0.12);
}

.target-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  color: #ffffff;
  background: #2f6feb;
  border-radius: 999px;
  padding: 2px 12px;
  margin-bottom: 4px;
}

.target-card .card-svg {
  display: block;
  width: 52%;
  height: auto;
  margin: 0 auto;
}

/* 新轮目标弹入（<=350ms 温和） */
.target-card.pop {
  -webkit-animation: popIn 0.35s ease;
  animation: popIn 0.35s ease;
}

@-webkit-keyframes popIn {
  0% { -webkit-transform: scale(0.82); transform: scale(0.82); opacity: 0.4; }
  60% { -webkit-transform: scale(1.04); transform: scale(1.04); }
  100% { -webkit-transform: scale(1); transform: scale(1); opacity: 1; }
}
@keyframes popIn {
  0% { -webkit-transform: scale(0.82); transform: scale(0.82); opacity: 0.4; }
  60% { -webkit-transform: scale(1.04); transform: scale(1.04); }
  100% { -webkit-transform: scale(1); transform: scale(1); opacity: 1; }
}

/* ---------- 候选卡（正方形格，width + padding-bottom 同百分比） ---------- */

.candidates-grid {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  width: 100%;
  background: #ffffff;
  border-radius: 14px;
  box-shadow: 0 2px 8px rgba(47, 111, 235, 0.12);
  padding: 6px;
  min-width: 0;
}

/* 3 候选：33.33%×1 行；4 候选：50%×2 行；5 候选：33.33%×2 行 */
.candidates-grid.m3 .cand-cell { width: 33.3333%; padding-bottom: 33.3333%; }
.candidates-grid.m4 .cand-cell { width: 50%; padding-bottom: 50%; }
.candidates-grid.m5 .cand-cell { width: 33.3333%; padding-bottom: 33.3333%; }

.cand-cell {
  position: relative;
  min-width: 0;
  cursor: pointer;
}

.cand-cell.locked { cursor: default; }

/* 格内间距（不用 flex gap）：内层比格子小，形成间隔 */
.cand-inner {
  position: absolute;
  left: 5px;
  top: 5px;
  right: 5px;
  bottom: 5px;
  background: #f5faff;
  border: 2px solid #e8f0fe;
  border-radius: 12px;
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
}

.cand-inner .card-svg {
  width: 72%;
  height: auto;
  display: block;
}

.cand-cell:active .cand-inner {
  border-color: #2f6feb;
  background: #eef6ff;
}

/* 正确：绿闪 300ms */
.cand-cell.correct .cand-inner {
  background: #e6f7ee;
  border-color: #12b76a;
  -webkit-animation: correctFlash 0.3s ease;
  animation: correctFlash 0.3s ease;
}

@-webkit-keyframes correctFlash {
  0% { -webkit-transform: scale(1); transform: scale(1); }
  50% { -webkit-transform: scale(1.1); transform: scale(1.1); }
  100% { -webkit-transform: scale(1); transform: scale(1); }
}
@keyframes correctFlash {
  0% { -webkit-transform: scale(1); transform: scale(1); }
  50% { -webkit-transform: scale(1.1); transform: scale(1.1); }
  100% { -webkit-transform: scale(1); transform: scale(1); }
}

/* 错误：红闪 400ms（留在本轮可重试） */
.cand-cell.wrong .cand-inner {
  background: #ffe9e6;
  border-color: #f04438;
  -webkit-animation: wrongFlash 0.4s ease;
  animation: wrongFlash 0.4s ease;
}

@-webkit-keyframes wrongFlash {
  0% { background: #ffe9e6; }
  50% { background: #ffc9c4; }
  100% { background: #f5faff; }
}
@keyframes wrongFlash {
  0% { background: #ffe9e6; }
  50% { background: #ffc9c4; }
  100% { background: #f5faff; }
}

/* ---------- 游戏页底栏 ---------- */

.game-footer {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
}

.game-footer .btn-ghost-sm {
  margin: 0 5px;
  min-height: 40px;
}

.footer-errors {
  margin-left: 10px;
  font-size: 15px;
  font-weight: 800;
  color: #f04438;
  min-width: 40px;
  text-align: left;
}

/* ---------- 首页：选难度 ---------- */

.page-title {
  font-size: 16px;
  font-weight: 700;
  margin: 8px 0 12px;
  text-align: center;
  color: #1f2329;
}

.home-hint {
  font-size: 12px;
  color: #8a919f;
  text-align: center;
  margin: -4px 0 14px;
}

.diff-list { margin-top: 4px; }

.diff-btn {
  display: block;
  width: 100%;
  min-height: 68px;
  border: none;
  border-radius: 14px;
  background: #ffffff;
  padding: 12px 18px;
  margin-bottom: 12px;
  text-align: left;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(47, 111, 235, 0.12);
}

.diff-btn:active { background: #eef6ff; }

.diff-head {
  display: block;
  font-size: 17px;
  font-weight: 800;
  color: #1f2329;
}

.diff-sub {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: #8a919f;
  font-weight: 600;
}

/* 底栏：打卡入口 / 返回 */

.btn-checkin {
  display: block;
  width: 100%;
  min-height: 48px;
  border: none;
  border-radius: 12px;
  background: #2f6feb;
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}

.btn-checkin:active { background: #245bc4; }

/* ---------- 结算浮层 ---------- */

.overlay {
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.5);
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  z-index: 50;
  padding: 24px;
}

.overlay-card {
  background: #ffffff;
  border-radius: 16px;
  padding: 26px 24px 24px;
  text-align: center;
  width: 100%;
  max-width: 340px;
  -webkit-animation: cardIn 0.25s ease;
  animation: cardIn 0.25s ease;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

@-webkit-keyframes cardIn {
  0% { -webkit-transform: scale(0.92); transform: scale(0.92); opacity: 0; }
  100% { -webkit-transform: scale(1); transform: scale(1); opacity: 1; }
}
@keyframes cardIn {
  0% { -webkit-transform: scale(0.92); transform: scale(0.92); opacity: 0; }
  100% { -webkit-transform: scale(1); transform: scale(1); opacity: 1; }
}

.overlay-title {
  font-size: 26px;
  font-weight: 800;
  color: #1f2329;
}

.overlay-sub {
  margin-top: 6px;
  font-size: 14px;
  color: #8a919f;
}

.summary {
  margin: 16px 0 18px;
}

.summary .stars-line {
  font-size: 34px;
  letter-spacing: 6px;
  color: #f5a623;
  margin-bottom: 8px;
  -webkit-animation: starPop 0.35s ease;
  animation: starPop 0.35s ease;
}

@-webkit-keyframes starPop {
  0% { -webkit-transform: scale(0.4); transform: scale(0.4); opacity: 0; }
  60% { -webkit-transform: scale(1.25); transform: scale(1.25); }
  100% { -webkit-transform: scale(1); transform: scale(1); opacity: 1; }
}
@keyframes starPop {
  0% { -webkit-transform: scale(0.4); transform: scale(0.4); opacity: 0; }
  60% { -webkit-transform: scale(1.25); transform: scale(1.25); }
  100% { -webkit-transform: scale(1); transform: scale(1); opacity: 1; }
}

.summary .checkin-line {
  margin-top: 6px;
  font-size: 13px;
  color: #2f6feb;
  font-weight: 600;
}

.summary .record-badge {
  margin-top: 6px;
  font-size: 15px;
  font-weight: 800;
  color: #12b76a;
}

.overlay-btns {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
}

.overlay-btns > * {
  margin: 4px 5px;
}

.btn-main {
  padding: 12px 30px;
  min-height: 48px;
  border: none;
  border-radius: 12px;
  background: #2f6feb;
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

.btn-main:active { background: #245bc4; }

.btn-ghost {
  padding: 10px 22px;
  min-height: 48px;
  border: none;
  border-radius: 12px;
  background: #e8f0fe;
  color: #2f6feb;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.btn-ghost:active { background: #d6e6fd; }

/* ---------- 打卡日历 ---------- */

.calendar {
  background: #ffffff;
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 2px 8px rgba(47, 111, 235, 0.12);
}

.calendar-grid {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  margin-top: 8px;
}

.calendar-grid > * { width: 14.28%; padding: 4px; }

.cal-day {
  width: 100%;
  padding: 8px 0;
  text-align: center;
  font-size: 13px;
  border-radius: 6px;
  color: #8a919f;
  background: #f2f7fc;
}

.cal-day.done { background: #ff9c1a; color: #ffffff; font-weight: 700; }

.cal-day.today { outline: 2px solid #2f6feb; }

.streak-info { text-align: center; margin-top: 10px; font-size: 14px; color: #1f2329; }
.streak-info b { color: #ff9c1a; }

/* ---------- 安全区增强 ---------- */
@supports ((padding-bottom: var(--safe-area-inset-bottom)) or (padding-bottom: env(safe-area-inset-bottom))) {
  .app-header { padding-top: var(--safe-area-inset-top, env(safe-area-inset-top, 0px)); }
  .app-footer { padding-bottom: var(--safe-area-inset-bottom, env(safe-area-inset-bottom, 0px)); }
}

/* ---------- 响应式：大屏微调 ---------- */

@media (min-width: 400px) {
  .topbar .level-title { font-size: 18px; }
  .target-card .card-svg { width: 48%; }
}