/* ============================================================
   找不同 — 样式（Chrome 61 基线层）
   约束：无 flex gap / aspect-ratio / clamp / inset / 逻辑属性 / :has
   主题：观察力 · 清新橙绿
   ============================================================ */

*, *::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));
}

/* ---------- 顶栏 ---------- */
.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: 10px 16px;
}

.header-icon {
  width: 32px;
  height: 32px;
  margin-right: 8px;
  border-radius: 8px;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  flex: 0 0 auto;
}

.header-title { font-size: 17px; font-weight: 600; }

.header-ver {
  margin-left: 6px;
  font-size: 10px;
  color: #c9cdd4;
}

/* ---------- 主体 ---------- */
.app-main {
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 auto;
  flex: 1 1 auto;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
}

.view {
  padding: 12px 16px;
  max-width: 480px; /* PC 打开居中、双图不超宽 */
  margin: 0 auto;
  min-width: 0;
}

/* ---------- 通用按钮 ---------- */
.btn {
  min-height: 48px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  color: #2f6feb;
  background: #e8f0fe;
  cursor: pointer;
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 auto;
  flex: 1 1 auto;
}

.btn:active { opacity: 0.75; }
.btn-primary { background: #2f6feb; color: #ffffff; }

/* ---------- 首页：选难度 ---------- */
.page-title {
  font-size: 16px;
  font-weight: 600;
  margin: 8px 0 12px;
  text-align: center;
}

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

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

.diff-card {
  background: #ffffff;
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 12px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.diff-btn {
  width: 100%;
  min-height: 56px;
  border: none;
  border-radius: 10px;
  font-size: 18px;
  font-weight: 600;
  color: #1f2329;
  background: #f0f6ff;
  cursor: pointer;
}

.diff-btn:active { opacity: 0.7; }

.diff-meta {
  margin-top: 8px;
  font-size: 12px;
  color: #8a919f;
  text-align: center;
}

/* ---------- 游戏页：顶部状态栏 ---------- */
.game-top {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  margin-bottom: 8px;
  min-height: 36px;
}

.game-back {
  border: none;
  background: none;
  color: #2f6feb;
  font-size: 14px;
  min-height: 36px;
  padding: 0 8px;
  cursor: pointer;
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  flex: 0 0 auto;
}

.game-name {
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 auto;
  flex: 1 1 auto;
  min-width: 0;
  font-size: 14px;
  font-weight: 600;
  color: #4e5969;
  text-align: center;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.game-timer {
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  flex: 0 0 auto;
  font-size: 14px;
  font-weight: 700;
  color: #2f6feb;
  min-width: 62px;
  text-align: center;
}

/* ---------- 进度条 ---------- */
.fd-progress {
  height: 8px;
  border-radius: 4px;
  background: #e5e6eb;
  margin: 0 0 10px;
  overflow: hidden;
}

.fd-progress-fill {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 4px;
  background: #12b76a;
  -webkit-transition: width 0.3s ease;
  transition: width 0.3s ease;
}

/* ---------- 双图对比（手机竖屏：上下堆叠；宽屏：左右并排） ---------- */
.scene-pair {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-flex-direction: column;
  flex-direction: column;
  min-width: 0;
}

.scene-wrap {
  min-width: 0;
  margin-bottom: 12px;
  background: #ffffff;
  border-radius: 14px;
  padding: 10px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.scene-label {
  font-size: 12px;
  font-weight: 600;
  color: #8a919f;
  margin-bottom: 6px;
  text-align: center;
}

.scene-box {
  min-width: 0;
}

.scene-svg {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  background: #ffffff;
  -webkit-tap-highlight-color: transparent;
}

/* 宽屏：左右并排（PC / 横屏） */
@media (min-width: 560px) {
  .scene-pair {
    -webkit-box-orient: horizontal;
    -webkit-flex-direction: row;
    flex-direction: row;
  }
  .scene-wrap {
    -webkit-box-flex: 1;
    -webkit-flex: 1 1 0;
    flex: 1 1 0;
    min-width: 0;
  }
  .scene-wrap + .scene-wrap { margin-left: 12px; }
}

/* ---------- 标记：正确对勾 / 错误红叉（SVG 内元素） ---------- */
.fd-found { opacity: 0; -webkit-animation: foundIn 0.3s ease forwards; animation: foundIn 0.3s ease forwards; }
.fd-miss { opacity: 0; -webkit-animation: missFade 0.4s ease forwards; animation: missFade 0.4s ease forwards; }

@-webkit-keyframes foundIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}
@keyframes foundIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

@-webkit-keyframes missFade {
  0% { opacity: 0; }
  20% { opacity: 1; }
  100% { opacity: 0; }
}
@keyframes missFade {
  0% { opacity: 0; }
  20% { opacity: 1; }
  100% { opacity: 0; }
}

/* ---------- 游戏页：状态 + 重新开始 ---------- */
.game-status {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  margin-top: 2px;
}

.game-found {
  font-size: 13px;
  font-weight: 700;
  color: #12b76a;
  margin-right: 24px;
}

.game-errors {
  font-size: 13px;
  font-weight: 700;
  color: #f04438;
}

.btn-row {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  margin-top: 14px;
}

.btn-row > * + * { margin-left: 10px; }

/* ---------- 成绩列表 ---------- */
.point-list { margin-top: 4px; }

.point-item {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
  align-items: center;
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  justify-content: space-between;
  padding: 14px 16px;
  background: #ffffff;
  border-radius: 10px;
  margin-bottom: 8px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.point-name { font-size: 15px; font-weight: 600; }

.point-meta { font-size: 12px; color: #8a919f; margin-top: 3px; }

.point-right { text-align: right; }

.point-time { font-size: 16px; font-weight: 700; color: #2f6feb; }

.point-stars { font-size: 13px; color: #f5a623; margin-top: 3px; }

/* ---------- 打卡日历 ---------- */
.calendar {
  background: #ffffff;
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.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: #f7f8fa;
}

.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: #4e5969; }
.streak-info b { color: #ff9c1a; }

/* ---------- 结果浮层 ---------- */
.result-overlay {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(15, 23, 42, 0.5);
  z-index: 999;
  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: 24px;
}

.result-box {
  background: #ffffff;
  border-radius: 16px;
  padding: 24px 20px;
  width: 100%;
  max-width: 340px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.result-title { font-size: 14px; color: #4e5969; }

.result-time {
  font-size: 44px;
  font-weight: 800;
  color: #2f6feb;
  margin-top: 4px;
}

.result-stats {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  margin-top: 14px;
}

.result-stat {
  margin: 0 14px;
  font-size: 13px;
  color: #4e5969;
  text-align: center;
}

.result-stat b { display: block; font-size: 18px; color: #1f2329; }

.result-stars {
  font-size: 22px;
  color: #f5a623;
  margin-top: 10px;
  letter-spacing: 4px;
}

.result-record {
  margin-top: 10px;
  font-size: 15px;
  font-weight: 700;
  color: #12b76a;
}

.result-box .btn {
  display: block;
  width: 100%;
  margin-top: 10px;
}

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

.footer-nav {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  padding: 8px 12px 10px;
}

.footer-nav > * + * { margin-left: 10px; }

.footer-btn {
  min-width: 64px;
  padding: 9px 0;
  font-size: 13px;
  color: #2f6feb;
  text-align: center;
  border-radius: 8px;
  background: #f2f3f5;
}

/* ---------- 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)); }
}