/* 基法筆順王 v2(Pokopia 村莊風)— 全面 UX 重構
   風格:3D voxel / 木牌 / 草地 / 角色陪伴
   插圖位用 placeholder,等 ChatGPT 出嘅 PNG drop-in 自動套用 */

/* 書寫示範字體:自由香港楷書 Free HK Kai 4700(© freehkfonts.opensource.hk,CC-BY 4.0)
   已 subset 到 curriculum 用字(~300 字),WOFF2 ~111KB。HK 標準楷書字形。 */
@font-face {
  font-family: "Free HK Kai";
  src: url("../assets/fonts/FreeHKKai-subset.woff2") format("woff2");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

:root {
  /* 天空 / 草地 */
  --sky-top: #a5d8f0;
  --sky-mid: #cfe9f7;
  --grass-top: #8fc54a;
  --grass-mid: #a4d456;
  --grass-bot: #6fa838;

  /* 木質 */
  --wood-light: #c89763;
  --wood: #a6754c;
  --wood-dark: #6b3f1f;
  --wood-darker: #3e2510;

  /* 卡紙 / 羊皮 */
  --cream: #fbf3da;
  --cream-d: #f0e2b6;
  --parch: #f8e8b8;
  --parch-d: #d6b97f;

  /* 字 */
  --ink: #3e2c10;
  --ink-soft: #6b4f24;

  /* 按鈕色 */
  --btn-orange: #ee863a;
  --btn-orange-d: #c46523;
  --btn-green: #5fb13c;
  --btn-green-d: #44892a;
  --btn-blue: #4b86c4;
  --btn-blue-d: #2f659e;
  --btn-purple: #8367a6;
  --btn-purple-d: #614579;
  --btn-red: #d54d3d;
  --btn-red-d: #a93324;
  --btn-yellow: #f4c540;
  --btn-yellow-d: #c69b1f;

  --shadow: 0 4px 0 rgba(62, 37, 16, .22), 0 6px 12px rgba(62, 37, 16, .15);
  --shadow-deep: 0 6px 0 rgba(62, 37, 16, .30), 0 12px 20px rgba(62, 37, 16, .25);
  --r: 16px;
  --r-lg: 22px;
  --r-pill: 999px;
}

/* 全域回主頁鍵：所有非主頁畫面自動顯示 */
.global-home-btn {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  left: max(72px, calc(env(safe-area-inset-left) + 72px));
  z-index: 120;
  width: 48px; height: 48px; padding: 0;
  display: flex; align-items: center; justify-content: center;
  border: 3px solid var(--wood-darker);
  border-radius: 14px;
  background: linear-gradient(to bottom, #fff8e6, var(--cream-d));
  color: var(--ink); font-size: 25px; line-height: 1;
  box-shadow: 0 4px 0 var(--wood-darker), 0 7px 12px rgba(62,37,16,.22);
  cursor: pointer;
  transition: transform .08s, box-shadow .08s;
}
.global-home-btn:active {
  transform: translateY(3px);
  box-shadow: 0 1px 0 var(--wood-darker), 0 3px 7px rgba(62,37,16,.18);
}
.global-home-btn:focus-visible {
  outline: 4px solid #fff;
  outline-offset: 2px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body {
  margin: 0; padding: 0; height: 100%;
  background: var(--grass-top); color: var(--ink);
  font-family: "PingFang HK","Microsoft JhengHei","Noto Sans CJK HK",sans-serif;
  font-size: 17px; line-height: 1.5;
  overscroll-behavior: contain;
  -webkit-touch-callout: none;
  user-select: none;
}
#app {
  min-height: 100vh; display: flex; flex-direction: column;
  background: linear-gradient(to bottom, var(--sky-top) 0%, var(--sky-mid) 40%, var(--grass-top) 55%, var(--grass-mid) 100%);
  position: relative;
}

/* 背景圖 hook(ChatGPT 提供 bg_*.png 即生效) */
.bg-scene {
  position: absolute; inset: 0;
  background-position: center bottom;
  background-size: cover;
  background-repeat: no-repeat;
  pointer-events: none; z-index: 0;
}
.bg-town   { background-image: url(../assets/bg/bg_town.jpg); }
.bg-forest { background-image: url(../assets/bg/bg_forest.jpg); }
.bg-farm   { background-image: url(../assets/bg/bg_farm.jpg); }
.bg-school { background-image: url(../assets/bg/bg_school.jpg); }

/* 草地底圍邊(背景未到位前嘅替身) */
#app::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 24%;
  background:
    radial-gradient(circle at 20% 110%, var(--grass-bot) 0 80px, transparent 81px),
    radial-gradient(circle at 60% 120%, var(--grass-bot) 0 100px, transparent 101px),
    linear-gradient(to bottom, transparent 0%, rgba(111,168,56,.35) 100%);
  z-index: 0; pointer-events: none;
}

/* === 通用木框 === */
.wood-frame {
  background: linear-gradient(to bottom, var(--cream) 0%, var(--cream-d) 100%);
  border: 4px solid var(--wood-dark);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow),
    inset 0 0 0 2px var(--wood),
    inset 0 0 0 6px var(--cream);
  padding: 14px 18px;
}

/* 木牌(標題用) */
.wood-sign {
  display: inline-block;
  background: linear-gradient(to bottom, var(--wood-light), var(--wood));
  color: var(--cream);
  border: 4px solid var(--wood-darker);
  border-radius: 14px;
  padding: 10px 24px;
  font-weight: 800; font-size: 22px;
  box-shadow: var(--shadow), inset 0 -4px 0 rgba(62,37,16,.3), inset 0 4px 0 rgba(255,255,255,.18);
  text-shadow: 1px 1px 0 var(--wood-darker);
  letter-spacing: 2px;
}

/* === 按鈕(4 色 + 大小)=== */
.btn {
  font-family: inherit; font-weight: 800; font-size: 18px;
  border: 3px solid var(--wood-darker);
  border-radius: 14px;
  padding: 10px 20px;
  cursor: pointer; min-height: 48px;
  color: #fff;
  text-shadow: 1px 1px 0 rgba(0,0,0,.25);
  box-shadow: var(--shadow), inset 0 -4px 0 rgba(0,0,0,.18), inset 0 3px 0 rgba(255,255,255,.20);
  transition: transform .05s, box-shadow .05s;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
}
.btn:active { transform: translateY(2px); box-shadow: 0 1px 0 rgba(62,37,16,.22), inset 0 -2px 0 rgba(0,0,0,.18); }
.btn[disabled] { opacity: .5; cursor: not-allowed; filter: grayscale(.6); }
.btn-big { font-size: 22px; padding: 14px 28px; min-height: 64px; border-radius: 18px; }
.btn-huge { font-size: 26px; padding: 18px 34px; min-height: 76px; border-radius: 20px; }
.btn-orange { background: linear-gradient(to bottom, var(--btn-orange), var(--btn-orange-d)); }
.btn-green  { background: linear-gradient(to bottom, var(--btn-green), var(--btn-green-d)); }
.btn-blue   { background: linear-gradient(to bottom, var(--btn-blue), var(--btn-blue-d)); }
.btn-purple { background: linear-gradient(to bottom, var(--btn-purple), var(--btn-purple-d)); }
.btn-red    { background: linear-gradient(to bottom, var(--btn-red), var(--btn-red-d)); }
.btn-yellow { background: linear-gradient(to bottom, var(--btn-yellow), var(--btn-yellow-d)); color: var(--ink); text-shadow: 0 1px 0 rgba(255,255,255,.4); }
.btn-cream  { background: linear-gradient(to bottom, var(--cream), var(--cream-d)); color: var(--ink); text-shadow: 0 1px 0 #fff; }

/* 圓形按鍵(close、sound、back) */
.btn-icon {
  width: 54px; height: 54px; border-radius: 50%;
  border: 3px solid var(--wood-darker);
  background: linear-gradient(to bottom, var(--cream), var(--cream-d));
  color: var(--ink); font-size: 22px; font-weight: 800;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow), inset 0 -3px 0 rgba(62,37,16,.18), inset 0 2px 0 rgba(255,255,255,.4);
}
.btn-icon:active { transform: translateY(2px); }

/* === Header === */
.app-bar {
  position: relative; z-index: 5;
  padding: calc(12px + env(safe-area-inset-top, 0px)) calc(16px + env(safe-area-inset-right, 0px)) 12px calc(16px + env(safe-area-inset-left, 0px));
  display: flex; justify-content: space-between; align-items: center;
  min-height: 64px;
}
.app-bar .left, .app-bar .right { display: flex; gap: 10px; align-items: center; }

/* === Screen 容器 === */
.screen {
  position: relative; z-index: 2;
  flex: 1; padding: 12px 16px 24px;
  max-width: 920px; margin: 0 auto; width: 100%;
}

/* === 角色 placeholder / 真圖 === */
.char {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center;
  width: 120px; height: 120px;
  border-radius: 14px;
  background: rgba(255,255,255,.4);
  border: 2px dashed rgba(62,37,16,.3);
  color: var(--ink); font-weight: 700; font-size: 14px;
  text-align: center; line-height: 1.2;
  overflow: hidden;
}
.char img {
  width: 100%; height: 100%; object-fit: contain;
  position: absolute; inset: 0;
}
.char.no-img::after { content: attr(data-name); }
.char.sm { width: 80px; height: 80px; }
.char.lg { width: 180px; height: 180px; }
.char.xl { width: 240px; height: 240px; }

/* === 對話 / 牌 提示 === */
.bubble {
  display: inline-block;
  background: var(--cream);
  border: 3px solid var(--wood-darker);
  border-radius: 14px;
  padding: 8px 14px;
  font-size: 14px; font-weight: 600; color: var(--ink);
  box-shadow: var(--shadow);
  position: relative;
  max-width: 240px;
}

/* ==================================================================
   主入口(home)
================================================================== */
.home-root { position: relative; min-height: 100vh; padding-bottom: 140px; }
.home-title-wrap {
  text-align: center; padding: 20px 16px 8px;
  position: relative; z-index: 3;
}
.home-title {
  display: inline-block;
  font-size: 42px; font-weight: 900;
  color: #fff;
  -webkit-text-stroke: 2px var(--wood-darker);
  text-shadow: 4px 4px 0 var(--wood-darker), 0 6px 0 rgba(62,37,16,.25);
  letter-spacing: 4px;
  padding: 0 12px;
}
.home-title::before { content: "♛ "; color: var(--btn-yellow); -webkit-text-stroke: 1px var(--wood-darker); }
.home-character-row {
  display: flex; gap: 16px; justify-content: center; align-items: end;
  margin: 20px 0; padding: 0 16px;
  position: relative; z-index: 2;
}
.home-bubble-side {
  align-self: center; max-width: 200px;
}
.home-buttons {
  position: fixed; bottom: 20px; left: 0; right: 0;
  display: flex; gap: 14px; justify-content: center;
  padding: 0 16px; z-index: 10;
}
.home-buttons .btn { flex: 1; max-width: 220px; flex-direction: column; padding: 12px 16px; }
.home-buttons .btn .ico { font-size: 30px; line-height: 1; }
.home-buttons .btn .lbl { margin-top: 4px; }

/* ==================================================================
   課題選擇(courseList)
================================================================== */
.course-list-screen { padding-top: 0; }
.course-list-header {
  text-align: center; padding: 8px 16px 12px;
  position: relative;
}
.course-rows {
  max-width: 540px; margin: 0 auto;
  display: flex; flex-direction: column; gap: 12px;
  padding: 0 8px;
}
.course-row {
  background: linear-gradient(to bottom, var(--cream) 0%, var(--cream-d) 100%);
  border: 4px solid var(--wood-dark);
  border-radius: var(--r-lg);
  padding: 14px 18px;
  display: flex; align-items: center; gap: 14px;
  cursor: pointer;
  box-shadow: var(--shadow), inset 0 0 0 2px var(--wood);
  position: relative;
  transition: transform .05s;
}
.course-row:active { transform: translateY(2px); }
.course-row.locked { filter: grayscale(.6); cursor: not-allowed; }
.course-row.done { background: linear-gradient(to bottom, #d8efc5 0%, #b5dd8e 100%); }
.course-row .ico { font-size: 36px; line-height: 1; width: 48px; text-align: center; }
.course-row .info { flex: 1; }
.course-row .no { font-size: 14px; color: var(--ink-soft); font-weight: 700; }
.course-row .name { font-size: 20px; font-weight: 800; color: var(--ink); }
.course-row .end { font-size: 22px; }

/* 課題清單底部：學期／年級切換 */
.curriculum-switcher {
  position: relative; z-index: 2;
  width: min(1080px, calc(100% - 32px));
  margin: 24px auto 6px;
  padding: 18px;
  background: linear-gradient(180deg, rgba(255,248,230,.97), rgba(240,226,182,.97));
  border: 4px solid var(--wood-dark);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-deep), inset 0 0 0 2px var(--wood-light);
}
.curriculum-switcher-title {
  color: var(--ink); font-size: 22px; font-weight: 900; text-align: center;
}
.curriculum-switcher-note {
  margin: 4px 0 14px; color: var(--ink-soft); font-size: 14px;
  font-weight: 700; text-align: center;
}
.curriculum-switcher-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}
.curriculum-switcher-btn {
  min-height: 68px; padding: 10px 8px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 4px;
  border: 3px solid var(--wood-dark); border-radius: 13px;
  background: #fff8e6; color: var(--ink);
  box-shadow: 0 4px 0 var(--wood-dark);
  font-family: inherit; cursor: pointer;
  transition: transform .08s, box-shadow .08s;
}
.curriculum-switcher-btn:active:not(.active):not(.empty) {
  transform: translateY(3px); box-shadow: 0 1px 0 var(--wood-dark);
}
.curriculum-switcher-btn.active {
  border-color: var(--btn-green-d); background: #e2f0d8;
  box-shadow: 0 4px 0 var(--btn-green-d); cursor: default;
}
.curriculum-switcher-btn.empty {
  border-color: #aaa; background: #eee; color: #888;
  box-shadow: 0 4px 0 #aaa; cursor: not-allowed; opacity: .68;
}
.curriculum-switcher-name { font-size: 17px; font-weight: 900; }
.curriculum-switcher-status { font-size: 12px; font-weight: 700; color: var(--ink-soft); }
.curriculum-switcher-btn.active .curriculum-switcher-status { color: var(--btn-green-d); }
.curriculum-switcher-btn.empty .curriculum-switcher-status { color: #888; }

@media (max-width: 680px) {
  .curriculum-switcher { width: calc(100% - 20px); padding: 14px; }
  .curriculum-switcher-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .curriculum-switcher-name { font-size: 15px; }
}

/* ==================================================================
   課題詳情(lesson)
================================================================== */
.lesson-screen { padding-top: 8px; }
.lesson-sign {
  display: flex; align-items: center; gap: 14px;
  margin: 0 auto 20px; max-width: 460px;
  padding: 16px 22px;
  background: linear-gradient(to bottom, var(--cream), var(--cream-d));
  border: 4px solid var(--wood-dark);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
}
.lesson-sign .ico { font-size: 48px; }
.lesson-sign .text { flex: 1; text-align: center; }
.lesson-sign .no { font-size: 16px; color: var(--ink-soft); font-weight: 700; }
.lesson-sign .name { font-size: 26px; font-weight: 900; color: var(--ink); }

.progress-block {
  max-width: 460px; margin: 0 auto 16px;
  background: rgba(255,255,255,.55); padding: 12px 16px;
  border-radius: 14px; border: 2px solid rgba(62,37,16,.2);
}
.progress-block .row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.progress-block .label { font-weight: 700; color: var(--ink); }
.progress-block .frac { font-weight: 800; color: var(--btn-green-d); }
.progress-bar {
  height: 16px; border-radius: 999px; background: var(--cream-d);
  border: 2px solid var(--wood-dark); overflow: hidden;
}
.progress-bar .fill {
  height: 100%;
  background: linear-gradient(to bottom, #b9e58a, var(--btn-green));
  transition: width .3s;
}

.char-rows {
  max-width: 460px; margin: 0 auto 16px;
  display: flex; flex-direction: column; gap: 8px;
}
.char-row {
  background: linear-gradient(to bottom, var(--cream), var(--cream-d));
  border: 3px solid var(--wood-dark); border-radius: 12px;
  padding: 8px 12px;
  display: flex; align-items: center; gap: 12px;
  cursor: pointer; box-shadow: var(--shadow-sm);
  transition: transform .05s;
}
.char-row:active { transform: translateY(2px); }
.char-row .ch { font-size: 32px; font-weight: 800; min-width: 48px; text-align: center; }
.char-row .meta { flex: 1; font-size: 16px; color: var(--ink-soft); font-weight: 700; }
.char-row .end { font-size: 22px; }
.char-row.done { background: linear-gradient(to bottom, #d8efc5, #b5dd8e); }
.char-row.view-only { background: linear-gradient(to bottom, #fff0d0, #f0d28a); }

.start-lesson-btn-wrap { text-align: center; margin-top: 20px; }

/* ==================================================================
   寫字頁(writing)— 簡潔大字格,角色陪伴
================================================================== */
.writing-screen {
  position: relative; flex: 1;
  display: flex; flex-direction: column;
  padding: 8px 12px 16px;
}
.writing-top {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 8px;
  padding-top: env(safe-area-inset-top, 0px);
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
}
.stroke-progress {
  flex: 1; text-align: center;
}
.stroke-progress .label { font-size: 17px; font-weight: 800; color: var(--ink); margin-bottom: 4px; }
.stroke-dots { display: inline-flex; gap: 4px; align-items: center; }
.stroke-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--cream-d); border: 2px solid var(--wood-dark);
}
.stroke-dot.on { background: var(--btn-green); }

.writing-stage-wrap {
  position: relative; flex: 1;
  display: flex; align-items: center; justify-content: center;
  margin: 8px 0;
}
.write-stage {
  width: min(80vw, 380px); height: min(80vw, 380px);
  background:
    linear-gradient(rgba(62,37,16,.3), rgba(62,37,16,.3)) center / 100% 1px no-repeat,
    linear-gradient(rgba(62,37,16,.3), rgba(62,37,16,.3)) center / 1px 100% no-repeat,
    #fffdf5;
  border: 5px solid var(--wood-dark);
  border-radius: 20px;
  box-shadow: var(--shadow-deep), inset 0 0 0 3px var(--cream);
  position: relative; touch-action: none;
}
.write-stage::before, .write-stage::after {
  content: ""; position: absolute; background: rgba(62,37,16,.18);
}
.write-stage::before { left: 0; top: 50%; width: 100%; height: 1px; }
.write-stage::after  { top: 0; left: 50%; height: 100%; width: 1px; }

.star-pop {
  position: absolute; bottom: -10px; right: -10px;
  font-size: 32px; line-height: 1;
  background: var(--btn-yellow);
  border: 3px solid var(--wood-darker); border-radius: 50%;
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: var(--ink); text-shadow: 0 1px 0 #fff;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: opacity .3s, transform .3s;
}
.star-pop.show { opacity: 1; transform: scale(1.15) rotate(-8deg); }
.star-pop .num { font-size: 14px; }

.writing-bottom {
  display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; padding: 8px;
}

.write-feedback {
  text-align: center; min-height: 26px;
  font-size: 17px; font-weight: 700; margin-top: 8px;
}
.write-feedback.ok { color: var(--btn-green-d); }
.write-feedback.miss { color: var(--btn-red); }
.write-feedback.info { color: var(--ink-soft); }

.writing-companion {
  position: fixed; bottom: 20px; pointer-events: none; z-index: 5;
  opacity: .85;
}
.writing-companion.left { left: 12px; }
.writing-companion.right { right: 12px; }
.writing-companion .char { width: 90px; height: 90px; background: transparent; border: none; }

/* View-only 字 — 大字 + 警告 */
.view-only-stage {
  width: min(80vw, 380px); height: min(80vw, 380px);
  background: linear-gradient(to bottom, var(--cream), var(--cream-d));
  border: 5px dashed var(--wood-dark);
  border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  /* 書寫示範字體必須楷書。優先用 embed 嘅自由香港楷書(HK 標準字形),退回系統楷書,最後 serif,永不 sans-serif */
  font-family: "Free HK Kai","標楷體","DFKai-SB","BiauKai","Kaiti TC","Kaiti SC","KaiTi","楷体",serif;
  font-size: 220px; font-weight: normal; color: var(--ink);
  line-height: 1;
}
.view-only-note {
  max-width: 460px; margin: 12px auto;
  background: #fff5e8; border: 3px solid var(--btn-orange);
  border-radius: 14px; padding: 12px 16px;
  color: #7a5022; font-size: 14px; text-align: center;
}
.view-only-note b { color: var(--btn-orange-d); display: block; margin-bottom: 4px; font-size: 16px; }

/* ==================================================================
   完成課題(lessonComplete)— 羊皮紙獎牌 + 角色慶祝 + 蓋印提示
================================================================== */
.lc-root {
  position: relative; flex: 1;
  display: flex; flex-direction: column; align-items: center;
  padding: 20px 16px 40px; gap: 14px;
}
.lc-banner {
  background: linear-gradient(to bottom, var(--btn-red), var(--btn-red-d));
  color: #fff; font-size: 28px; font-weight: 900;
  border: 4px solid var(--wood-darker); border-radius: 14px;
  padding: 8px 32px;
  text-shadow: 2px 2px 0 var(--wood-darker);
  box-shadow: var(--shadow);
  position: relative; z-index: 3;
  margin-bottom: -16px;
}
.lc-scroll {
  background: linear-gradient(to bottom, var(--parch), var(--parch-d));
  border: 5px solid var(--wood-darker);
  border-radius: var(--r-lg);
  padding: 36px 28px 24px;
  max-width: 420px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-deep), inset 0 0 0 3px rgba(255,255,255,.5);
  position: relative;
}
.lc-scroll::before, .lc-scroll::after {
  content: ""; position: absolute; left: 0; right: 0; height: 12px;
  background: linear-gradient(to right, var(--wood-dark), var(--wood), var(--wood-dark));
  border-radius: 6px;
}
.lc-scroll::before { top: -6px; }
.lc-scroll::after { bottom: -6px; }
.lc-text-row { font-size: 17px; color: var(--ink-soft); }
.lc-lesson-name { font-size: 30px; font-weight: 900; color: var(--ink); margin: 6px 0; }
.lc-medal {
  width: 160px; height: 160px; margin: 16px auto;
  background: radial-gradient(circle at 50% 50%, var(--btn-yellow) 0 60px, var(--btn-orange) 61px 70px, transparent 71px),
              conic-gradient(from 0deg, var(--btn-yellow), #fff8b9, var(--btn-yellow), #fff8b9, var(--btn-yellow), #fff8b9, var(--btn-yellow), #fff8b9);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 64px;
  border: 4px solid var(--wood-darker);
  box-shadow: var(--shadow-deep);
  position: relative;
}
.lc-medal img { max-width: 100%; max-height: 100%; }
.lc-title-ribbon {
  background: var(--btn-red); color: #fff;
  font-size: 18px; font-weight: 800; padding: 6px 22px;
  border: 3px solid var(--wood-darker); border-radius: 8px;
  display: inline-block; margin-top: 8px;
  box-shadow: var(--shadow);
}
.lc-stamp-prompt {
  margin: 16px 0 8px; font-size: 16px; font-weight: 700;
  background: var(--cream); border: 2px dashed var(--wood-dark);
  padding: 10px 14px; border-radius: 12px; color: var(--ink);
}
.lc-stamp-prompt strong { color: var(--btn-red); }
.lc-courseno { color: var(--ink-soft); font-size: 13px; margin-top: 8px; }
.lc-companion-row {
  display: flex; justify-content: space-between; align-items: end;
  width: 100%; max-width: 480px; padding: 0 16px;
  margin-top: -20px;
}
.lc-companion-row .char { background: transparent; border: none; width: 110px; height: 110px; }
.lc-buttons { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; margin-top: 12px; }

/* ==================================================================
   我的徽章(badges)— 收藏館展示架
================================================================== */
.badges-screen { padding: 8px 12px 24px; }
.badges-header { text-align: center; margin-bottom: 16px; }
.badge-shelf {
  background: linear-gradient(to bottom, var(--cream), var(--cream-d));
  border: 5px solid var(--wood-darker);
  border-radius: var(--r-lg);
  padding: 20px;
  max-width: 760px; margin: 0 auto;
  box-shadow: var(--shadow-deep), inset 0 0 0 3px var(--wood);
}
.badge-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
}
@media (max-width: 560px) { .badge-grid { grid-template-columns: repeat(3, 1fr); } }
.badge-cell {
  background: rgba(255,255,255,.5);
  border: 2px solid var(--wood-dark);
  border-radius: 14px;
  padding: 10px 6px;
  text-align: center;
}
.badge-cell .img-holder {
  width: 72px; height: 72px; margin: 0 auto 6px;
  border-radius: 50%;
  background: var(--cream-d); border: 2px solid var(--wood-dark);
  display: flex; align-items: center; justify-content: center;
  font-size: 36px;
}
.badge-cell.unlocked .img-holder {
  background: linear-gradient(to bottom, var(--btn-yellow), var(--btn-orange));
  box-shadow: 0 0 12px rgba(244, 197, 64, .6);
}
.badge-cell.locked .img-holder { filter: grayscale(1) brightness(.7); opacity: .5; }
.badge-cell .label { font-size: 13px; font-weight: 700; color: var(--ink); line-height: 1.2; }
.badge-cell.locked .label { color: var(--ink-soft); }

/* ==================================================================
   老師專區(settings)— 木屋 PIN pad
================================================================== */
.settings-screen { padding: 16px; max-width: 460px; margin: 0 auto; }
.settings-house {
  background: linear-gradient(to bottom, var(--cream), var(--cream-d));
  border: 5px solid var(--wood-darker); border-radius: var(--r-lg);
  padding: 24px 20px; position: relative;
  box-shadow: var(--shadow-deep);
}
.settings-house::before {
  content: ""; position: absolute; left: 50%; top: -16px;
  transform: translateX(-50%);
  width: 0; height: 0;
  border-left: 80px solid transparent;
  border-right: 80px solid transparent;
  border-bottom: 30px solid var(--btn-blue-d);
}
.settings-house-title {
  text-align: center;
  background: linear-gradient(to bottom, var(--wood-light), var(--wood));
  color: var(--cream);
  border: 3px solid var(--wood-darker);
  border-radius: 12px; padding: 8px;
  font-size: 22px; font-weight: 900; margin-bottom: 16px;
  text-shadow: 1px 1px 0 var(--wood-darker);
}

.pin-display {
  display: flex; gap: 12px; justify-content: center; margin: 16px 0;
}
.pin-slot {
  width: 52px; height: 60px;
  background: #fff; border: 3px solid var(--wood-dark);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 32px; font-weight: 900; color: var(--ink);
}
.pin-slot.filled { background: var(--cream-d); }

.pin-pad {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; max-width: 280px; margin: 0 auto;
}
.pin-key {
  height: 56px; background: linear-gradient(to bottom, var(--cream), var(--cream-d));
  border: 3px solid var(--wood-dark); border-radius: 12px;
  font-size: 22px; font-weight: 800; color: var(--ink);
  cursor: pointer; box-shadow: var(--shadow);
}
.pin-key:active { transform: translateY(2px); }
.pin-key.back { background: linear-gradient(to bottom, #f6c0b8, var(--btn-red)); color: #fff; }

.settings-content { margin-top: 20px; }
.settings-block { background: var(--cream); border: 3px solid var(--wood-dark);
  border-radius: 14px; padding: 14px; margin: 12px 0; }
.settings-block h3 { margin: 0 0 8px; font-size: 17px; }
.settings-row { display: flex; justify-content: space-between; align-items: center; padding: 6px 0; gap: 10px; }
input[type="text"], input[type="number"], input[type="password"] {
  padding: 10px 12px; border-radius: 10px; border: 2px solid var(--wood-dark);
  font-size: 17px; font-family: inherit; min-width: 0;
}
.pin-warn {
  background: #fff5e8; border: 2px dashed var(--btn-orange);
  border-radius: 10px; padding: 8px 12px;
  color: #7a5022; font-size: 13px; margin: 8px 0;
}
.lesson-lock-list { max-height: 260px; overflow-y: auto; }
.lesson-lock-list label {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 0; cursor: pointer; font-size: 14px;
}
.lesson-lock-list input { width: auto; }

/* ==================================================================
   完成一筆/一字 浮動 ⭐ 動畫
================================================================== */
.floating-star {
  position: fixed; font-size: 36px; pointer-events: none; z-index: 100;
  animation: floatStar 0.9s ease-out forwards;
}
@keyframes floatStar {
  0% { transform: scale(0.4) translateY(0); opacity: 0; }
  20% { transform: scale(1.2) translateY(-10px); opacity: 1; }
  100% { transform: scale(0.6) translate(var(--dx,200px),var(--dy,-200px)); opacity: 0; }
}

/* === 字完成全屏小慶祝(墨墨 + ⭐+1)=== */
.char-cheer-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(165, 216, 240, .8);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  pointer-events: none;
  animation: cheerFade 1.2s ease-out forwards;
}
.char-cheer-overlay .star {
  font-size: 96px; color: var(--btn-yellow); -webkit-text-stroke: 4px var(--wood-darker);
  text-shadow: 4px 4px 0 var(--wood-darker);
  animation: cheerStar 1.2s ease-out;
}
.char-cheer-overlay .plus1 {
  font-size: 36px; color: #fff; -webkit-text-stroke: 2px var(--wood-darker);
  text-shadow: 2px 2px 0 var(--wood-darker);
  font-weight: 900;
}
.char-cheer-overlay .say {
  margin-top: 14px; font-size: 24px; font-weight: 800; color: var(--ink);
  background: var(--cream); border: 3px solid var(--wood-darker);
  padding: 6px 18px; border-radius: 12px;
}
@keyframes cheerFade {
  0% { opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { opacity: 0; }
}
@keyframes cheerStar {
  0%   { transform: scale(0) rotate(-30deg); }
  40%  { transform: scale(1.3) rotate(8deg); }
  100% { transform: scale(1) rotate(0); }
}

/* === 全屏「畀大哥哥睇」鎖定 === */
.show-teacher-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: var(--cream);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  cursor: pointer;
  padding: 24px;
}

/* === Utility === */
.spacer { flex: 1; }
.hidden { display: none !important; }
.center { text-align: center; }
.muted { color: var(--ink-soft); }
.row { display: flex; gap: 10px; align-items: center; }
.gap-2 { gap: 14px; }
.mt-2 { margin-top: 14px; }