:root {
  --ink: #1f1d3a;
  --muted: #5d5a7a;
  --card: #ffffff;
  --line: #e8e5f6;
  --soft: #f6f4ff;
  --brand: #6d28d9;
  --brand-dark: #4c1d95;
  --accent: #f59e0b;
  --accent-dark: #b45309;
  --ok: #15803d;
  --ok-bg: #dcfce7;
  --ok-line: #22c55e;
  --bad: #b91c1c;
  --bad-bg: #fee2e2;
  --bad-line: #ef4444;
  --radius: 24px;
  --shadow: 0 18px 50px rgba(30, 10, 80, 0.28);
}

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

html, body { margin: 0; }

body {
  min-height: 100vh;
  min-height: 100dvh;
  font-family: "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink);
  background: linear-gradient(155deg, #312e81 0%, #6d28d9 48%, #c026d3 100%);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* Arka planda süzülen matematik sembolleri */
.backdrop {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}
.backdrop span {
  position: absolute;
  font-family: "Baloo 2", sans-serif;
  font-weight: 800;
  font-size: clamp(26px, 5vw, 46px);
  color: rgba(255, 255, 255, 0.09);
  animation: float 16s ease-in-out infinite alternate;
  user-select: none;
}
@keyframes float {
  from { transform: translateY(0) rotate(-6deg); }
  to { transform: translateY(-40px) rotate(8deg); }
}

#confetti {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 50;
}

.wrap {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 16px 32px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}

/* Ses düğmesi */
.sound-toggle {
  position: fixed;
  top: 14px;
  right: 14px;
  z-index: 60;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 50%;
  font-size: 22px;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: background 0.2s, transform 0.2s;
}
.sound-toggle:hover { background: rgba(255, 255, 255, 0.3); transform: scale(1.06); }

/* Düğmeler */
.btn {
  font-family: "Baloo 2", sans-serif;
  font-weight: 800;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}
.btn:focus-visible, .option:focus-visible, .sound-toggle:focus-visible {
  outline: 3px solid #fde047;
  outline-offset: 3px;
}
.btn-start {
  display: block;
  width: 100%;
  padding: 16px 24px;
  font-size: 26px;
  color: #3b1d00;
  background: linear-gradient(180deg, #fcd34d, var(--accent));
  box-shadow: 0 6px 0 var(--accent-dark), 0 12px 24px rgba(180, 83, 9, 0.35);
}
.btn-start:hover { transform: translateY(-2px); }
.btn-start:active { transform: translateY(4px); box-shadow: 0 2px 0 var(--accent-dark); }
#start-btn { animation: pulse 2.2s ease-in-out infinite; }
@keyframes pulse {
  0%, 100% { scale: 1; }
  50% { scale: 1.03; }
}
.btn-next {
  display: block;
  margin: 20px 0 0 auto;
  padding: 12px 28px;
  font-size: 20px;
  color: #fff;
  background: linear-gradient(180deg, #8b5cf6, var(--brand));
  box-shadow: 0 5px 0 var(--brand-dark);
}
.btn-next:hover { transform: translateY(-2px); }
.btn-next:active { transform: translateY(3px); box-shadow: 0 2px 0 var(--brand-dark); }
.btn-ghost {
  padding: 12px 24px;
  font-size: 20px;
  color: var(--brand);
  background: var(--soft);
}
.btn-ghost:hover { background: #ece8ff; }

/* Başlangıç ekranı */
.hero {
  text-align: center;
  color: #fff;
  margin: 28px 0 24px;
}
.hero-emoji {
  font-size: 76px;
  line-height: 1;
  animation: spin-wobble 4s ease-in-out infinite;
}
@keyframes spin-wobble {
  0%, 100% { transform: rotate(-12deg); }
  50% { transform: rotate(12deg); }
}
.title {
  font-family: "Baloo 2", sans-serif;
  font-weight: 800;
  font-size: clamp(40px, 9vw, 64px);
  line-height: 1.05;
  margin: 10px 0 6px;
  text-shadow: 0 4px 0 rgba(40, 10, 90, 0.45), 0 10px 30px rgba(0, 0, 0, 0.25);
}
.subtitle {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  opacity: 0.9;
}
.start-card { text-align: left; }
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 18px;
}
.info-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  display: grid;
  gap: 10px;
}
.info-list li {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
  border-radius: 16px;
  background: var(--soft);
  font-weight: 700;
}
.info-list li span { font-size: 22px; }
.hint {
  margin: 16px 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
kbd {
  display: inline-block;
  padding: 0 6px;
  border: 1px solid var(--line);
  border-bottom-width: 3px;
  border-radius: 6px;
  font-family: inherit;
  font-weight: 800;
  font-size: 13px;
  background: #fff;
}

/* Konu etiketleri */
.topic {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.01em;
}
.topic-powers { background: #ede9fe; color: #5b21b6; }
.topic-factors { background: #ccfbf1; color: #0f766e; }
.topic-gcd { background: #ffedd5; color: #c2410c; }

/* Oyun ekranı */
.game-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: #fff;
  margin: 4px 56px 14px 0;
}
.brand {
  font-family: "Baloo 2", sans-serif;
  font-weight: 800;
  font-size: 22px;
}
.stats { display: flex; gap: 8px; }
.stat {
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 800;
  font-size: 15px;
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(6px);
}
.stat-score.bump { animation: bump 0.5s ease; }
@keyframes bump {
  40% { transform: scale(1.25); background: rgba(253, 224, 71, 0.5); }
}

.progress-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  color: #fff;
}
.q-number {
  font-weight: 800;
  white-space: nowrap;
  font-size: 15px;
}
.progress {
  flex: 1;
  height: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, #fde047, var(--accent));
  transition: width 0.5s ease;
}

.question-card.enter { animation: card-in 0.45s cubic-bezier(0.2, 0.9, 0.3, 1.2); }
@keyframes card-in {
  from { opacity: 0; transform: translateY(18px) scale(0.98); }
  to { opacity: 1; transform: none; }
}
.question-card.shake { animation: shake 0.45s ease; }
@keyframes shake {
  20%, 60% { transform: translateX(-8px); }
  40%, 80% { transform: translateX(8px); }
}

.q-text {
  margin: 14px 0 4px;
  font-size: 19px;
  font-weight: 600;
}
.q-text b { color: var(--brand-dark); }

sup { font-size: 0.68em; line-height: 0; }

.frac {
  display: inline-flex;
  flex-direction: column;
  vertical-align: middle;
  text-align: center;
  font-size: 0.82em;
  line-height: 1.15;
  margin: 0 2px;
}
.frac > span:first-child {
  border-bottom: 2px solid currentColor;
  padding: 0 3px;
}

.q-figure {
  margin: 16px 0 4px;
  display: flex;
  justify-content: center;
}
.figure-svg {
  width: 100%;
  max-width: 360px;
  height: auto;
}
.figure-svg text {
  font-family: "Nunito", sans-serif;
  font-weight: 800;
  fill: var(--ink);
}
.data-table {
  border-collapse: separate;
  border-spacing: 0;
  min-width: min(100%, 360px);
  border: 2px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  font-size: 17px;
}
.data-table th, .data-table td {
  padding: 10px 18px;
  text-align: left;
}
.data-table th {
  background: var(--soft);
  color: var(--brand-dark);
  font-weight: 800;
}
.data-table td { border-top: 1px solid var(--line); font-weight: 700; }

.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}
.option {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 62px;
  padding: 10px 14px;
  border: 2px solid var(--line);
  border-radius: 18px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  font-size: 18px;
  text-align: left;
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s, background 0.15s, box-shadow 0.15s, opacity 0.2s;
}
.option:not(:disabled):hover {
  transform: translateY(-2px);
  border-color: #a78bfa;
  box-shadow: 0 8px 18px rgba(109, 40, 217, 0.14);
}
.option:disabled { cursor: default; }
.letter {
  flex: none;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--soft);
  color: var(--brand);
  font-family: "Baloo 2", sans-serif;
  font-weight: 800;
  font-size: 18px;
}
.option.correct {
  border-color: var(--ok-line);
  background: var(--ok-bg);
  animation: pop 0.4s ease;
}
.option.correct .letter { background: var(--ok-line); color: #fff; }
.option.wrong {
  border-color: var(--bad-line);
  background: var(--bad-bg);
}
.option.wrong .letter { background: var(--bad-line); color: #fff; }
.option.dim { opacity: 0.5; }
@keyframes pop {
  50% { transform: scale(1.04); }
}

/* Geri bildirim ve çözüm */
.feedback {
  margin-top: 20px;
  padding: 18px 20px;
  border-radius: 20px;
  animation: card-in 0.4s ease;
}
.feedback.is-correct { background: var(--ok-bg); border: 2px solid #86efac; }
.feedback.is-wrong { background: #fff7ed; border: 2px solid #fdba74; }
.fb-head {
  display: flex;
  align-items: center;
  gap: 14px;
}
.fb-emoji { font-size: 40px; line-height: 1; }
.fb-head strong {
  display: block;
  font-family: "Baloo 2", sans-serif;
  font-size: 24px;
  line-height: 1.2;
}
.is-correct .fb-head strong { color: var(--ok); }
.is-wrong .fb-head strong { color: var(--bad); }
.fb-head span { font-weight: 700; color: var(--muted); }
.fb-head span b { color: var(--ok); }

.steps-title {
  margin: 16px 0 8px;
  font-family: "Baloo 2", sans-serif;
  font-size: 19px;
  color: var(--ink);
}
.steps {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 10px 14px 10px 50px;
  border-radius: 14px;
  background: #fff;
  font-weight: 600;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 12px;
  top: 10px;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
  font-size: 14px;
}
.solution { margin-top: 12px; }
.solution summary {
  cursor: pointer;
  font-weight: 800;
  color: var(--ok);
  margin-bottom: 8px;
}

/* Bitiş ekranı */
.end-card { text-align: center; margin-top: 24px; }
.trophy {
  font-size: 84px;
  line-height: 1;
  animation: spin-wobble 3s ease-in-out infinite;
}
.end-title {
  font-family: "Baloo 2", sans-serif;
  font-size: 36px;
  margin: 8px 0 4px;
  color: var(--brand-dark);
}
.stars { font-size: 40px; letter-spacing: 6px; }
.stars .off { filter: grayscale(1); opacity: 0.3; }
.final-score {
  margin: 6px 0 0;
  font-family: "Baloo 2", sans-serif;
  font-weight: 800;
  font-size: 48px;
  color: var(--ink);
  line-height: 1.1;
}
.final-detail { margin: 2px 0 10px; color: var(--muted); font-weight: 700; }
.final-message {
  margin: 0 auto 20px;
  max-width: 460px;
  padding: 12px 16px;
  border-radius: 16px;
  background: var(--soft);
  font-weight: 700;
}
.breakdown {
  display: grid;
  gap: 12px;
  text-align: left;
  margin-bottom: 24px;
}
.bd-row-head {
  display: flex;
  justify-content: space-between;
  font-weight: 800;
  margin-bottom: 4px;
}
.bd-bar {
  height: 12px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
}
.bd-fill {
  height: 100%;
  border-radius: inherit;
  transition: width 0.8s ease;
}
.bd-fill.topic-powers { background: #8b5cf6; }
.bd-fill.topic-factors { background: #14b8a6; }
.bd-fill.topic-gcd { background: #f97316; }
.end-actions {
  display: grid;
  gap: 12px;
}

.footer {
  position: relative;
  z-index: 1;
  text-align: center;
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  font-weight: 600;
  padding: 0 16px 24px;
}
.footer small {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  opacity: 0.8;
}
.footer a { color: inherit; }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .card { padding: 20px 16px; }
  .options { grid-template-columns: 1fr; }
  .q-text { font-size: 17.5px; }
  .btn-start { font-size: 23px; }
  .btn-next { width: 100%; }
  .brand { font-size: 19px; }
  .data-table th, .data-table td { padding: 8px 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}

.nw { white-space: nowrap; }