/* ============================================================
   七巧板 — 样式（Chrome 61 基线层）
   约束：无 flex gap / aspect-ratio / clamp / inset / 逻辑属性 / :has
   主题：空间感知 · 天蓝/青色系（主色 #1976d2 / #4aa8ff，浅蓝背景）
   ============================================================ */

*, *::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: #e8f4ff;
  background: -webkit-linear-gradient(180deg, #e8f4ff 0%, #d9ecff 100%);
  background: linear-gradient(180deg, #e8f4ff 0%, #d9ecff 100%);
  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 {
  position: relative;
  -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 #dcebfa;
}

.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;
}

.game-back {
  position: absolute;
  left: 10px;
  top: calc(10px + var(--safe-area-inset-top, env(safe-area-inset-top, 0px)));
  border: none;
  background: #eef6ff;
  color: #1976d2;
  font-size: 14px;
  min-height: 36px;
  min-width: 44px;
  padding: 0 12px;
  border-radius: 18px;
  cursor: pointer;
}

/* ---------- 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;
  margin: 0 auto;
  min-width: 0;
}

/* ---------- 通用按钮 ---------- */
.btn {
  min-height: 48px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  color: #1976d2;
  background: #dceeff;
  cursor: pointer;
  display: block;
  width: 100%;
  margin-top: 10px;
}

.btn:active { opacity: 0.75; }
.btn-primary { background: #4aa8ff; color: #ffffff; }

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

.home-hint {
  font-size: 12px;
  color: #7a8aa0;
  text-align: center;
  margin: -4px 0 14px;
}

.level-section { margin-bottom: 18px; }

.level-head {
  font-size: 14px;
  font-weight: 700;
  color: #1976d2;
  margin: 10px 0 8px;
  padding-left: 4px;
}

.puzzle-grid {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  margin: 0 -4px;
}

.puzzle-card {
  width: 33.3333%;
  padding: 0 4px;
  margin-bottom: 8px;
  min-width: 0;
}

.puzzle-card > * {
  background: #ffffff;
  border-radius: 12px;
  box-shadow: 0 1px 4px rgba(47, 128, 237, 0.1);
  padding: 8px 4px 6px;
  text-align: center;
  cursor: pointer;
}

.puzzle-card:active > * { opacity: 0.8; }

.puzzle-card.done .pc-name::after { content: ' ✓'; color: #12b76a; }

.thumb-box { line-height: 0; }

.thumb-svg {
  display: block;
  width: 100%;
  height: auto;
}

.pc-name {
  font-size: 13px;
  font-weight: 600;
  color: #1f2329;
  margin-top: 6px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.pc-meta {
  font-size: 11px;
  color: #7a8aa0;
  margin-top: 2px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

/* ---------- 游戏页：顶部状态 ---------- */
.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-name {
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 auto;
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  font-weight: 700;
  color: #1976d2;
  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: #1f2329;
  min-width: 68px;
  text-align: center;
}

.game-placed {
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 700;
  color: #12b76a;
  min-width: 64px;
  text-align: right;
}

/* 挑战档：顶部缩略参考 */
.ref-row {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  margin-bottom: 8px;
}

.ref-thumb {
  background: #ffffff;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(47, 128, 237, 0.12);
  line-height: 0;
  overflow: hidden;
  width: 84px;
  height: 84px;
  border: 1px dashed #b8d9f8;
}

.ref-thumb .thumb-svg { width: 84px; height: 84px; }

/* ---------- 游戏区 ---------- */
.board-wrap {
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 2px 10px rgba(47, 128, 237, 0.14);
  padding: 4px;
  margin: 0 auto;
  max-width: 440px;
}

#board {
  display: block;
  width: 100%;
  height: auto;
  touch-action: none;
  background: #f7faff;
  border-radius: 12px;
}

#board .piece { cursor: -webkit-grab; cursor: grab; }
#board .piece.placed { cursor: default; opacity: 1; }
#board .piece.selected polygon {
  -webkit-filter: drop-shadow(0 0 4px rgba(25, 118, 210, 0.6));
  filter: drop-shadow(0 0 4px rgba(25, 118, 210, 0.6));
}

.hint-pulse {
  -webkit-animation: hintPulse 0.5s ease-in-out infinite alternate;
  animation: hintPulse 0.5s ease-in-out infinite alternate;
}

@-webkit-keyframes hintPulse {
  0% { opacity: 0.5; }
  100% { opacity: 1; }
}

@keyframes hintPulse {
  0% { opacity: 0.5; }
  100% { opacity: 1; }
}

/* ---------- 工具栏 ---------- */
.toolbar {
  display: -webkit-box;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  margin: 12px auto 0;
  max-width: 440px;
}

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

.tool-btn {
  -webkit-box-flex: 1;
  -webkit-flex: 1 1 auto;
  flex: 1 1 auto;
  min-width: 0;
  min-height: 48px;
  border: none;
  border-radius: 24px;
  background: #ffffff;
  color: #1976d2;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid #b8d9f8;
  cursor: pointer;
}

.tool-btn:active { background: #e3f0ff; }
.tool-btn.primary { background: #4aa8ff; color: #ffffff; border-color: #4aa8ff; }

/* ---------- 提示浮层 ---------- */
.flash-msg {
  position: fixed;
  top: 20%;
  left: 50%;
  -webkit-transform: translateX(-50%);
  transform: translateX(-50%);
  background: rgba(15, 23, 42, 0.75);
  color: #ffffff;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 20px;
  z-index: 999;
  white-space: nowrap;
}

/* ---------- 结算 ---------- */
.result-box {
  background: #ffffff;
  border-radius: 16px;
  padding: 24px 20px;
  width: 100%;
  max-width: 340px;
  margin: 24px auto;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

.result-stars {
  font-size: 30px;
  color: #f5a623;
  margin-top: 8px;
  letter-spacing: 6px;
}

.result-stars .off { opacity: 0.25; }

.result-time {
  font-size: 38px;
  font-weight: 800;
  color: #1976d2;
  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-record {
  margin-top: 10px;
  font-size: 15px;
  font-weight: 700;
  color: #12b76a;
}

.result-best {
  margin-top: 8px;
  font-size: 13px;
  color: #7a8aa0;
}

.result-streak {
  margin-top: 6px;
  font-size: 13px;
  color: #ff9c1a;
  font-weight: 600;
}

/* ---------- 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(47, 128, 237, 0.1);
}

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

.point-meta { font-size: 12px; color: #7a8aa0; margin-top: 3px; }

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

.point-time { font-size: 16px; font-weight: 700; color: #1976d2; }

.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(47, 128, 237, 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: #7a8aa0;
  background: #f0f6fd;
}

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

.cal-day.today { outline: 2px solid #1976d2; }

.streak-info { text-align: center; margin-top: 10px; font-size: 14px; color: #4e5969; }
.streak-info b { color: #ff9c1a; }

/* ---------- 底栏 ---------- */
.app-footer {
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 auto;
  flex: 0 0 auto;
  background: #ffffff;
  border-top: 1px solid #dcebfa;
  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: #1976d2;
  text-align: center;
  border-radius: 8px;
  background: #eef6ff;
}

.foot-hint {
  text-align: center;
  font-size: 12px;
  color: #7a8aa0;
  padding: 8px 0 10px;
}

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