:root {
  --bg: #fff8e7;
  --card: #ffffff;
  --ink: #2b2b2b;
  --muted: #6b6b6b;
  --line: #ecdcb8;
  --red: #d62828;
  --red-soft: #fde2e2;
  --yellow: #f4b400;
  --yellow-soft: #fff1c2;
  --blue: #1e6fd9;
  --blue-soft: #dbe9fd;
  --green: #2a9d48;
  --green-soft: #dcf5e3;
  --lock: #9a9a9a;
  --shadow: 0 4px 0 rgba(0, 0, 0, 0.12);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Noto Sans TC", "Microsoft JhengHei", "PingFang TC", sans-serif;
  font-size: 19px;
  line-height: 1.7;
}

a { color: var(--blue); }

.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }

/* 頂部導覽 */
.top {
  background: var(--red);
  color: #fff;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 10;
}
.top .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding-top: 10px;
  padding-bottom: 10px;
}
.logo {
  color: #fff;
  text-decoration: none;
  font-weight: 900;
  font-size: 22px;
  margin-right: auto;
}
.nav { display: flex; flex-wrap: wrap; gap: 6px; }
.nav a {
  color: #fff;
  text-decoration: none;
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 700;
}
.nav a.on, .nav a:hover { background: rgba(255, 255, 255, 0.25); }
.score-pill {
  background: var(--yellow);
  color: var(--ink);
  font-weight: 900;
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

main { padding: 24px 0 48px; }

h1 { font-size: 32px; line-height: 1.3; margin: 0 0 8px; }
h2 { font-size: 26px; margin: 32px 0 12px; }
h3 { font-size: 21px; margin: 0 0 8px; }
.lead { color: var(--muted); margin: 0 0 20px; }

.card {
  background: var(--card);
  border: 3px solid var(--line);
  border-radius: 18px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
}

/* 首頁 */
.hero { text-align: center; padding: 16px 0 8px; }
.hero .big { font-size: 64px; line-height: 1; }
.progress {
  height: 26px;
  background: #f1e6cc;
  border-radius: 999px;
  overflow: hidden;
  margin: 12px 0 6px;
}
.progress > div {
  height: 100%;
  background: linear-gradient(90deg, var(--red), var(--yellow), var(--green));
  width: 0;
  transition: width 0.6s;
}
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.big-btn {
  display: block;
  text-decoration: none;
  color: var(--ink);
  text-align: center;
  font-weight: 900;
  font-size: 22px;
}
.big-btn .emoji { font-size: 48px; display: block; }
.big-btn small { display: block; font-weight: 400; font-size: 16px; color: var(--muted); }

/* 階段 */
.stage { margin-top: 28px; }
.stage-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 18px;
  border-radius: 16px;
  color: #fff;
  font-weight: 900;
}
.stage-head .name { font-size: 22px; margin-right: auto; }
.stage-head .tag { background: rgba(255, 255, 255, 0.3); padding: 2px 12px; border-radius: 999px; font-size: 16px; }
.c-red { background: var(--red); }
.c-yellow { background: var(--yellow); color: var(--ink) !important; }
.c-blue { background: var(--blue); }
.stage.locked .stage-head { background: var(--lock); color: #fff !important; }
.stage-goal { margin: 10px 4px 14px; color: var(--muted); }

.lock-box {
  text-align: center;
  padding: 24px;
  background: repeating-linear-gradient(45deg, #f4f4f4, #f4f4f4 12px, #ececec 12px, #ececec 24px);
  border: 3px dashed var(--lock);
  border-radius: 18px;
  color: var(--muted);
  font-weight: 700;
}
.lock-box .emoji { font-size: 44px; display: block; }

/* 購物清單 */
.item { margin-bottom: 14px; }
.code {
  display: inline-block;
  background: var(--blue-soft);
  color: var(--blue);
  font-weight: 900;
  padding: 0 10px;
  border-radius: 8px;
  margin-left: 6px;
  font-size: 16px;
}
.item p { margin: 4px 0; }
.item .where { color: var(--muted); font-size: 16px; }
.links { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.links a {
  font-size: 15px;
  padding: 2px 12px;
  border: 2px solid var(--blue);
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
}
.note {
  background: var(--yellow-soft);
  border-left: 6px solid var(--yellow);
  padding: 10px 14px;
  border-radius: 10px;
  margin-bottom: 14px;
}

/* 課程列表 */
.lesson-card {
  display: flex;
  gap: 14px;
  align-items: center;
  text-decoration: none;
  color: var(--ink);
}
.lesson-card .emoji { font-size: 40px; flex: none; }
.lesson-card .meta { font-size: 15px; color: var(--muted); }
.lesson-card.done { border-color: var(--green); background: var(--green-soft); }
.lesson-card.locked { opacity: 0.55; cursor: not-allowed; }
.badge {
  margin-left: auto;
  flex: none;
  font-weight: 900;
  font-size: 15px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--yellow-soft);
}
.lesson-card.done .badge { background: var(--green); color: #fff; }

/* 單堂課 */
.lesson-top { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.lesson-top .emoji { font-size: 60px; line-height: 1; }
.question {
  font-size: 22px;
  font-weight: 900;
  background: var(--blue-soft);
  padding: 12px 18px;
  border-radius: 14px;
  margin: 16px 0;
}
.section h2 { display: flex; align-items: center; gap: 10px; }
.section h2 .n {
  background: var(--red);
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex: none;
}
.materials { margin: 0; padding-left: 0; list-style: none; }
.materials li { padding: 6px 0 6px 34px; position: relative; border-bottom: 1px dashed var(--line); }
.materials li:last-child { border-bottom: 0; }
.materials li::before { content: "🧩"; position: absolute; left: 0; }

.steps { list-style: none; padding: 0; margin: 0; counter-reset: s; }
.steps li { margin-bottom: 10px; }
.steps label {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 14px;
  border: 3px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  cursor: pointer;
}
.steps input { width: 28px; height: 28px; flex: none; margin-top: 3px; accent-color: var(--green); }
.steps .num { font-weight: 900; color: var(--red); flex: none; }
.steps input:checked ~ span { text-decoration: line-through; color: var(--muted); }
.steps label:has(input:checked) { border-color: var(--green); background: var(--green-soft); }

.result { background: var(--green-soft); border-color: var(--green); }
.discovery { background: var(--yellow-soft); border-color: var(--yellow); }

.done-btn {
  display: block;
  width: 100%;
  margin-top: 24px;
  font: inherit;
  font-size: 24px;
  font-weight: 900;
  padding: 16px;
  border: 0;
  border-radius: 18px;
  background: var(--green);
  color: #fff;
  box-shadow: var(--shadow);
  cursor: pointer;
}
.done-btn:disabled { background: var(--lock); cursor: not-allowed; }
.done-btn.finished { background: var(--yellow); color: var(--ink); }
.hint { text-align: center; color: var(--muted); margin: 8px 0 0; }

.speak {
  font: inherit;
  font-size: 16px;
  border: 2px solid var(--blue);
  background: #fff;
  color: var(--blue);
  border-radius: 999px;
  padding: 2px 12px;
  cursor: pointer;
  font-weight: 700;
}

.pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.pager a { font-weight: 700; }

/* 慶祝視窗 */
.toast {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  background: #fff;
  border: 4px solid var(--yellow);
  border-radius: 24px;
  padding: 24px 32px;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
  opacity: 0;
  pointer-events: none;
  transition: 0.25s;
  z-index: 50;
  max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, -50%) scale(1); pointer-events: auto; }
.toast .emoji { font-size: 64px; display: block; }
.toast b { font-size: 26px; display: block; }

.btn {
  font: inherit;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 12px;
  border: 2px solid var(--ink);
  background: #fff;
  cursor: pointer;
}
.btn.danger { border-color: var(--red); color: var(--red); }

/* 圖片 */
.photo { margin: 16px 0; }
.photo img {
  display: block;
  width: 100%;
  max-height: 340px;
  object-fit: cover;
  border-radius: 18px;
  border: 3px solid var(--line);
  background: #f1e6cc;
}
.photo.wide img { max-height: 260px; }
.photo figcaption { font-size: 13px; color: var(--muted); margin-top: 4px; line-height: 1.5; }
.thumb {
  display: block;
  width: calc(100% + 40px);
  margin: -18px -20px 12px;
  height: 140px;
  object-fit: cover;
  border-radius: 15px 15px 0 0;
}
.credits li { font-size: 15px; }

/* 帳號 */
.logout {
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.7);
  border-radius: 999px;
  padding: 2px 12px;
  cursor: pointer;
}
.score-pill.admin { background: var(--ink); color: #fff; }
.kids { margin: 8px 0 20px; }
.kid-btn {
  font: inherit;
  font-size: 22px;
  font-weight: 900;
  cursor: pointer;
  text-align: center;
}
.kid-btn .emoji { display: block; font-size: 52px; line-height: 1.2; }
.kid-btn small { display: block; font-size: 15px; color: var(--muted); font-weight: 700; }
.kid-btn.picked { border-color: var(--blue); background: var(--blue-soft); }
.login-form { display: flex; flex-direction: column; gap: 10px; margin-bottom: 16px; }
.login-form label, .login-form .label { display: flex; flex-direction: column; font-weight: 700; gap: 4px; }
.login-form input[type="password"], .login-form input[type="email"], .login-form input:not([type]), .modal input {
  font: inherit;
  padding: 10px 14px;
  border: 3px solid var(--line);
  border-radius: 12px;
  width: 100%;
}
.avatars { display: flex; flex-wrap: wrap; gap: 8px; }
.avatars label { flex-direction: row; cursor: pointer; }
.avatars input { position: absolute; opacity: 0; }
.avatars span { font-size: 34px; padding: 2px 8px; border: 3px solid var(--line); border-radius: 12px; }
.avatars input:checked + span { border-color: var(--blue); background: var(--blue-soft); }
.avatars input:focus-visible + span { outline: 3px solid var(--blue); }
.fold { margin-bottom: 16px; }
.fold summary { font-weight: 900; cursor: pointer; font-size: 20px; }
.fold[open] summary { margin-bottom: 12px; }
.err { color: var(--red); font-weight: 700; margin: 0; min-height: 1em; }
.btn.primary { background: var(--green); border-color: var(--green); color: #fff; }
.btn.small { font-size: 14px; padding: 2px 10px; margin: 2px; }
.kids-table { width: 100%; border-collapse: collapse; font-size: 17px; }
.kids-table th, .kids-table td { text-align: left; padding: 8px 6px; border-bottom: 1px dashed var(--line); }
.kids-table th, .kids-table td:not(:last-child) { white-space: nowrap; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 60;
}
.modal-box {
  background: #fff;
  border: 4px solid var(--yellow);
  border-radius: 24px;
  padding: 22px;
  width: 100%;
  max-width: 420px;
  text-align: center;
}
.modal-box .emoji { font-size: 52px; display: block; }
.modal-box b { font-size: 24px; display: block; }
.modal-box .row { display: flex; gap: 10px; justify-content: center; margin-top: 10px; }

footer { text-align: center; color: var(--muted); font-size: 15px; padding: 24px 16px 40px; }

@media (max-width: 600px) {
  body { font-size: 18px; }
  h1 { font-size: 27px; }
  .top { position: static; }
  .logo { font-size: 20px; }
  .nav a { padding: 2px 8px; font-size: 16px; }
  .lesson-top .emoji { font-size: 48px; }
}

.code-help p, .code-help ul { margin: 6px 0; }
.code-help .code { margin-left: 0; }

/* 購物清單商品圖 */
.item.has-photo { display: flex; gap: 16px; align-items: flex-start; }
.item-photo { flex: 0 0 180px; margin: 0; }
.item-photo img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 12px;
  border: 2px solid var(--line);
  background: #f1e6cc;
}
.item-photo figcaption { font-size: 12px; color: var(--muted); line-height: 1.4; margin-top: 4px; }
.item-body { flex: 1; min-width: 0; }
@media (max-width: 600px) {
  .item.has-photo { flex-direction: column; }
  .item-photo { flex: none; width: 100%; }
  .item-photo img { aspect-ratio: 16 / 9; }
}