/* ============ Petualangan Berhitung — gaya ramah anak ============ */
:root {
  --bg1: #fef3c7;
  --bg2: #dbeafe;
  --ink: #1f2937;
  --card: #ffffff;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --good: #16a34a;
  --bad: #dc2626;
  --radius: 22px;
  --shadow: 0 8px 24px rgba(31, 41, 55, 0.12);
}

* { box-sizing: border-box; }

/* sentuh di HP: tanpa delay klik & tanpa sorotan biru */
button { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }

/* atribut hidden harus selalu menang atas aturan display */
[hidden] { display: none !important; }

html, body { margin: 0; padding: 0; }

body {
  min-height: 100vh;
  min-height: 100dvh; /* tinggi layar HP dinamis (URL bar Chrome tidak memotong konten) */
  padding-bottom: env(safe-area-inset-bottom, 0px); /* hormati notch/gesture bar */
  display: flex;
  flex-direction: column;
  font-family: "Segoe UI Rounded", "Comic Sans MS", "Baloo 2", "Trebuchet MS", system-ui, sans-serif;
  color: var(--ink);
  background: linear-gradient(160deg, var(--bg1), var(--bg2));
  font-size: 18px;
}

/* ---------- header ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
}
.brand { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; }
.brand-emoji { font-size: 44px; flex: none; }
.brand h1 { margin: 0; font-size: clamp(20px, 6vw, 28px); letter-spacing: 0.5px; }
.tagline { margin: 2px 0 0; font-size: 14px; color: #6b7280; }
.sound-btn {
  font-size: 24px;
  border: 2px solid #e8edf3;
  background: var(--card);
  border-radius: 50%;
  width: 52px;
  height: 52px;
  flex: none;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow);
  cursor: pointer;
}
.sound-btn:active { transform: scale(0.92); }

main {
  flex: 1;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 8px 16px 24px;
  display: flex;
  flex-direction: column;
}

.footer { text-align: center; color: #6b7280; padding: 10px; font-size: 14px; }

/* ---------- pemilih kesulitan ---------- */
.diff-picker {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin: 6px 0 18px;
  flex-wrap: wrap;
}
.diff-btn {
  font: inherit;
  font-size: 18px;
  font-weight: 700;
  padding: 10px 20px;
  border: 3px solid transparent;
  border-radius: 999px;
  background: var(--card);
  box-shadow: var(--shadow);
  cursor: pointer;
}
.diff-btn.is-active {
  border-color: var(--accent);
  background: #fff7ed;
  color: var(--accent-dark);
}

/* ---------- kartu mode ---------- */
.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}
.mode-card {
  font: inherit;
  text-align: center;
  background: var(--card);
  border: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 12px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform 0.12s ease;
}
.mode-card:hover { transform: translateY(-4px) scale(1.02); }
.mode-card:active { transform: scale(0.97); }
.mode-emoji { font-size: 44px; }
.mode-name { font-size: 19px; font-weight: 800; }
.mode-desc { font-size: 13px; color: #6b7280; }
.mode-best { font-size: 13px; color: var(--accent-dark); font-weight: 700; }

/* ---------- bagian atas kuis ---------- */
.quiz-top {
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "back   .      score"
    "progress progress progress";
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.chip-btn {
  grid-area: back;
  font: inherit;
  font-weight: 700;
  border: 2px solid #e8edf3;
  background: var(--card);
  border-radius: 999px;
  padding: 10px 16px;
  box-shadow: var(--shadow);
  cursor: pointer;
}
.chip {
  background: var(--card);
  border: 2px solid #e8edf3;
  border-radius: 999px;
  padding: 8px 14px;
  box-shadow: var(--shadow);
  font-weight: 800;
}
.score-chip { grid-area: score; justify-self: end; white-space: nowrap; }
.progress {
  grid-area: progress;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
}
.dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #d1d5db;
  display: inline-block;
}
.dot.is-current { background: var(--accent); transform: scale(1.25); }
.dot.ok { background: var(--good); }
.dot.no { background: var(--bad); }

/* ---------- kartu soal ---------- */
.question-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 26px 20px;
  text-align: center;
  min-height: 170px;
  flex: 1 1 auto; /* ikut membesar/mengecil sesuai sisa tinggi layar */
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.q-prompt {
  font-size: clamp(30px, 7vw, 52px);
  font-weight: 800;
  letter-spacing: 1px;
  word-break: break-word;
}
.q-hint { margin-top: 10px; color: #6b7280; font-size: 16px; }

.answer-box {
  margin: 18px auto 0;
  width: 150px;
  font-size: 40px;
  font-weight: 800;
  border: 4px dashed var(--accent);
  border-radius: 16px;
  padding: 8px 0;
  background: #fffbeb;
}
.answer-box.is-empty { color: #d1d5db; }

/* ---------- pilihan ganda ---------- */
.choices {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}
.choice-btn {
  font: inherit;
  background: #eff6ff;
  border: 3px solid #bfdbfe;
  border-radius: 16px;
  padding: 12px 8px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transition: transform 0.1s ease;
}
.choice-btn:hover { transform: scale(1.05); }
.choice-btn:active { transform: scale(0.95); }
.choice-label { font-size: 30px; font-weight: 800; }
.choice-caption { font-size: 13px; color: #6b7280; }
.choice-wrong { border-color: var(--bad); background: #fee2e2; }

/* ---------- umpan balik ---------- */
.feedback {
  margin: 14px auto 0;
  max-width: 520px;
  text-align: center;
  font-size: 20px;
  font-weight: 800;
  border-radius: 16px;
  padding: 12px 16px;
}
.feedback.good { background: #dcfce7; color: var(--good); }
.feedback.bad { background: #fee2e2; color: var(--bad); }

/* ---------- keypad ---------- */
.keypad {
  margin: 16px auto 0;
  width: 100%;
  max-width: 360px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.key {
  font: inherit;
  font-size: 28px;
  font-weight: 800;
  padding: 14px 0;
  min-height: 46px; /* target sentuh nyaman untuk anak */
  border: none;
  border-radius: 16px;
  background: var(--card);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.08s ease;
}
.key:active { transform: scale(0.92); }
.key-del { background: #fee2e2; color: var(--bad); }
.key-ok { background: #dcfce7; color: var(--good); }

.next-btn {
  display: block;
  margin: 16px auto 0;
  font: inherit;
  font-size: 20px;
  font-weight: 800;
  border: none;
  border-radius: 999px;
  padding: 14px 26px;
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow);
  cursor: pointer;
}
.next-btn:active { transform: scale(0.95); }

/* ---------- layar kuis full-screen: semua muat dalam satu layar HP ---------- */
#screen-quiz { flex: 1; min-height: 0; display: flex; flex-direction: column; }
body[data-screen="quiz"] { height: 100vh; height: 100dvh; overflow: hidden; } /* kunci tinggi = layar */
body[data-screen="quiz"] main { min-height: 0; }
body[data-screen="quiz"] .tagline,
body[data-screen="quiz"] .footer { display: none; } /* hemat ruang vertikal saat bermain */
body[data-screen="quiz"] .topbar { padding: 8px 16px; }
body[data-screen="quiz"] .question-card { min-height: 130px; }
body[data-screen="quiz"] .keypad {
  margin-top: 12px;
  flex: 0 0 auto; /* tinggi alami tombol seperti desain awal; kartu soal yang menyerap sisa ruang */
}

/* layar pendek (HP kecil / landscape): padatkan agar tetap muat tanpa scroll */
@media (max-height: 720px) {
  body[data-screen="quiz"] main { padding-bottom: 8px; }
  body[data-screen="quiz"] .question-card { padding: 12px 14px; }
  body[data-screen="quiz"] .q-hint { margin-top: 6px; font-size: 14px; }
  body[data-screen="quiz"] .answer-box { margin-top: 10px; width: 120px; font-size: 30px; padding: 4px 0; }
  body[data-screen="quiz"] .feedback { margin-top: 8px; padding: 8px 12px; font-size: 16px; }
  body[data-screen="quiz"] .next-btn { margin-top: 8px; padding: 10px 20px; font-size: 16px; }
  body[data-screen="quiz"] .keypad {
    flex: 0 0 auto; gap: 8px; /* tinggi alami, tombol tetap lebih lebar daripada tinggi */
  }
  body[data-screen="quiz"] .key { min-height: 40px; font-size: 22px; padding: 8px 0; }
}

/* HP landscape: kartu soal di kiri, keypad di kanan, agar tetap muat satu layar */
@media (orientation: landscape) and (max-height: 560px) {
  body[data-screen="quiz"] .topbar { padding: 4px 16px; }
  body[data-screen="quiz"] .brand-emoji { font-size: 24px; }
  body[data-screen="quiz"] .brand h1 { font-size: 17px; }
  body[data-screen="quiz"] #screen-quiz {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
    grid-template-areas:
      "top    top"
      "card   keypad"
      "fb     next";
    grid-template-rows: auto 1fr auto;
    gap: 6px 12px;
  }
  body[data-screen="quiz"] .quiz-top { grid-area: top; gap: 4px 8px; margin-bottom: 6px; }
  body[data-screen="quiz"] .question-card { grid-area: card; }
  body[data-screen="quiz"] .keypad {
    grid-area: keypad; margin-top: 0; max-height: none;
    gap: 6px; grid-template-rows: repeat(4, auto); align-content: center;
  }
  body[data-screen="quiz"] .key { min-height: 38px; font-size: 20px; padding: 6px 0; }
  body[data-screen="quiz"] .feedback { grid-area: fb; margin-top: 0; padding: 6px 10px; font-size: 14px; }
  body[data-screen="quiz"] .next-btn { grid-area: next; margin-top: 0; justify-self: center; align-self: center; }
  body[data-screen="quiz"] .sound-btn { width: 40px; height: 40px; font-size: 18px; }
  body[data-screen="quiz"] main { padding: 4px 12px 6px; }
  body[data-screen="quiz"] .chip-btn { padding: 4px 12px; font-size: 14px; }
  body[data-screen="quiz"] .score-chip { padding: 4px 10px; font-size: 14px; }
  body[data-screen="quiz"] .dot { width: 12px; height: 12px; }
}

/* ---------- animasi ---------- */
.question-card.pop { animation: pop 0.35s ease; }
.question-card.shake { animation: shake 0.4s ease; }
@keyframes pop {
  0% { transform: scale(1); }
  40% { transform: scale(1.05); }
  100% { transform: scale(1); }
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-6px); }
  80% { transform: translateX(6px); }
}

/* ---------- layar hasil ---------- */
.result-card {
  position: relative;
  overflow: hidden;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 30px 22px;
  text-align: center;
  max-width: 560px;
  margin: 20px auto;
}
.result-card h2 { font-size: 34px; margin: 0 0 8px; }
.stars { font-size: 46px; letter-spacing: 6px; }
.result-score { font-size: 22px; font-weight: 800; margin: 8px 0 4px; }
.result-msg { font-size: 18px; color: #4b5563; }
.result-best { font-size: 15px; color: var(--accent-dark); font-weight: 700; }
.result-actions {
  margin-top: 18px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.big-btn {
  font: inherit;
  font-size: 19px;
  font-weight: 800;
  border: none;
  border-radius: 999px;
  padding: 14px 24px;
  background: #e5e7eb;
  cursor: pointer;
  box-shadow: var(--shadow);
}
.big-btn.primary { background: var(--accent); color: #fff; }
.big-btn:active { transform: scale(0.95); }

/* konfeti */
.confetti { position: absolute; inset: 0; pointer-events: none; }
.confetti i {
  position: absolute;
  top: -12px;
  width: 9px;
  height: 14px;
  border-radius: 3px;
  animation: fall 2.4s linear forwards;
}
@keyframes fall {
  to { transform: translateY(420px) rotate(540deg); opacity: 0.4; }
}

/* ---------- layar kecil ---------- */
@media (max-width: 560px) {
  body { font-size: 16px; }

  /* header ringkas: tombol suara tetap di kanan sejajar judul */
  .topbar { padding: 10px 12px; gap: 10px; }
  .brand { gap: 10px; }
  .brand-emoji { font-size: 30px; }
  .brand h1 { font-size: 19px; }
  .tagline { font-size: 12px; }
  .sound-btn { width: 44px; height: 44px; font-size: 20px; }

  main { padding: 6px 12px 20px; }

  /* pemilih kesulitan: 3 kolom sama lebar, tidak ada baris menggantung */
  .diff-picker {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin: 4px 0 14px;
  }
  .diff-btn { font-size: 14px; padding: 10px 4px; white-space: nowrap; }

  /* kartu mode lebih padat */
  .mode-card { padding: 14px 8px; gap: 4px; }
  .mode-emoji { font-size: 34px; }
  .mode-name { font-size: 15px; }
  .mode-desc, .mode-best { font-size: 12px; }

  /* bar atas kuis lebih ramping */
  .chip-btn { padding: 8px 14px; font-size: 15px; }
  .chip { padding: 6px 12px; font-size: 15px; }
  .dot { width: 13px; height: 13px; }
  .progress { gap: 5px; }

  .question-card { padding: 20px 14px; min-height: 150px; }
  .answer-box { width: 130px; font-size: 34px; }

  .keypad { max-width: 320px; gap: 8px; }
  .key { font-size: 24px; padding: 12px 0; }
}