/* ============================================================
   小小企鵝 — 升小一面試準備（自家用）樣式
   設計：可愛、大按鈕、大字體，手機/平板/電腦通用
   ============================================================ */

:root {
  --blue: #1e88e5;
  --blue-d: #1565c0;
  --blue-l: #e3f2fd;
  --yellow: #ffca28;
  --green: #43a047;
  --red: #e53935;
  --bg: #f3f8ff;
  --card: #ffffff;
  --text: #1a2b3c;
  --muted: #6b7c8f;
  --radius: 18px;
  --shadow: 0 4px 14px rgba(30, 136, 229, 0.12);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; padding: 0;
  font-family: "PingFang HK", "Microsoft YaHei", "Noto Sans HK", -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 18px;
  line-height: 1.5;
}

/* ---------- 頂部欄 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px;
  background: linear-gradient(135deg, var(--blue), #42a5f5);
  color: #fff;
  box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo { font-size: 30px; }
.brand-text strong { display: block; font-size: 19px; line-height: 1.1; }
.brand-text small { font-size: 12px; opacity: 0.85; }
.star-badge {
  background: rgba(255,255,255,0.22);
  padding: 6px 14px; border-radius: 999px;
  font-weight: 700; font-size: 17px;
}

/* ---------- 螢幕切換 ---------- */
.screen { display: none; padding: 16px; max-width: 1100px; margin: 0 auto; }
.screen.active { display: block; }
.footer-note {
  text-align: center; color: var(--muted);
  font-size: 12px; padding: 16px; max-width: 1100px; margin: 0 auto;
}

/* ---------- 主頁 hero ---------- */
.hero { text-align: center; padding: 22px 10px 10px; }
.hero-penguin { font-size: 64px; animation: bob 2.4s ease-in-out infinite; }
@keyframes bob { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.hero h1 { font-size: 24px; margin: 6px 0 2px; }
.hero-sub { color: var(--muted); margin: 0; font-size: 15px; }

/* ---------- 主選單 grid ---------- */
.menu-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 18px;
}
.menu-card {
  display: flex; flex-direction: column; align-items: flex-start;
  gap: 4px;
  background: var(--card);
  border: none; border-radius: var(--radius);
  padding: 18px 16px;
  box-shadow: var(--shadow);
  cursor: pointer;
  text-align: left;
  transition: transform .12s, box-shadow .12s;
}
.menu-card:active { transform: scale(0.97); }
.menu-card.feat { background: linear-gradient(135deg, #fff8e1, #fff); border: 2px solid var(--yellow); }
.mc-emoji { font-size: 32px; }
.mc-title { font-weight: 800; font-size: 18px; color: var(--blue-d); }
.mc-desc { font-size: 13px; color: var(--muted); }

/* ---------- 練習頁 subbar ---------- */
.subbar {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 14px;
}
.subbar h2 { font-size: 20px; margin: 0; flex: 1; color: var(--blue-d); }
.back-btn {
  background: var(--blue-l); color: var(--blue-d);
  border: none; border-radius: 12px;
  padding: 8px 14px; font-size: 15px; font-weight: 700; cursor: pointer;
}
.subbar-right { font-size: 14px; color: var(--muted); }

/* ---------- 卡片 ---------- */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px 18px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}
.card.center { text-align: center; }
.q { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.tips { color: var(--muted); font-size: 14px; margin: 8px 0; }
.big-emoji { font-size: 52px; text-align: center; margin: 8px 0; }
.scene-emoji { font-size: 46px; text-align: center; letter-spacing: 6px; margin: 6px 0 12px; }

/* ---------- 按鈕 ---------- */
.card-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 12px 0; }
.opt-btn {
  flex: 1 1 auto;
  min-width: 64px;
  background: var(--blue); color: #fff;
  border: none; border-radius: 14px;
  padding: 14px 16px; font-size: 17px; font-weight: 700;
  cursor: pointer; transition: transform .1s, background .15s;
}
.opt-btn:active { transform: scale(0.96); }
.opt-btn:disabled { opacity: .55; cursor: default; }
.listen-btn { background: var(--green); }
.next-btn { background: var(--yellow); color: #4a3500; width: 100%; flex-basis: 100%; }
.rate-btn { background: #fff3cd; color: #6b5300; }
.danger-btn { background: #fdecea; color: var(--red); width: 100%; flex-basis: 100%; margin-top: 10px; }

/* emoji / 文字選項 grid */
.emoji-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.emoji-grid .opt-btn { font-size: 40px; padding: 24px 0; }
.text-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.text-grid .opt-btn { font-size: 18px; padding: 18px; }

.opt-btn.correct { background: var(--green); }
.opt-btn.wrong { background: var(--red); }

/* ---------- 回饋 ---------- */
.fb { margin-top: 12px; padding: 12px 14px; border-radius: 12px; font-size: 16px; }
.fb.ok { background: #e8f5e9; color: #1b5e20; }
.fb.no { background: #fdecea; color: #b71c1c; }
.fb small { color: inherit; opacity: .85; }
.rate { margin-top: 14px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 15px; }

/* ---------- 數學排序 ---------- */
.picked-box {
  text-align: center; font-size: 22px; font-weight: 800;
  background: var(--blue-l); border-radius: 12px; padding: 12px; margin: 10px 0; color: var(--blue-d);
  min-height: 50px;
}

/* ---------- 獎勵小屋 ---------- */
.sticker-wall { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.sticker { font-size: 34px; background: var(--blue-l); border-radius: 12px; padding: 8px 12px; }
.cap-result { margin-top: 12px; }

/* ---------- 統計 ---------- */
.stats-wrap { display: grid; gap: 16px; }
.stat-list { list-style: none; padding: 0; margin: 8px 0; }
.stat-list li { padding: 6px 0; border-bottom: 1px dashed #e0e8f0; font-size: 16px; }
.subj-table { display: grid; gap: 10px; margin-top: 8px; }
.subj-row { display: grid; grid-template-columns: 130px 1fr 110px; align-items: center; gap: 8px; font-size: 14px; }
.subj-name { font-weight: 700; }
.subj-bar { background: #eef2f6; border-radius: 999px; height: 14px; overflow: hidden; }
.subj-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--blue), #42a5f5); }
.subj-pct { text-align: right; color: var(--muted); font-size: 13px; }
.daily-chart { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; align-items: end; height: 120px; margin-top: 10px; }
.day-col { display: flex; flex-direction: column; align-items: center; justify-content: flex-end; height: 100%; }
.day-col .bar { width: 70%; background: var(--blue); border-radius: 6px 6px 0 0; min-height: 4px; }
.day-col small { font-size: 11px; color: var(--muted); margin-top: 4px; }

/* ---------- 響應式：平板 ---------- */
@media (min-width: 600px) {
  body { font-size: 19px; }
  .menu-grid { grid-template-columns: repeat(3, 1fr); }
  .emoji-grid { grid-template-columns: repeat(4, 1fr); }
  .text-grid { grid-template-columns: repeat(3, 1fr); }
  .hero h1 { font-size: 30px; }
}

/* ---------- 響應式：電腦 ---------- */
@media (min-width: 900px) {
  body { font-size: 20px; }
  .menu-grid { grid-template-columns: repeat(4, 1fr); gap: 18px; }
  .screen { padding: 28px; }
  .hero-penguin { font-size: 80px; }
  .card { padding: 26px; }
  .q { font-size: 24px; }
  .opt-btn { font-size: 18px; padding: 16px 20px; }
  .stats-wrap { grid-template-columns: 1fr 1fr; }
  .stats-wrap .card:last-child, .stats-wrap .card:nth-last-child(2) { grid-column: 1 / -1; }
}