.pk-page {
  padding: 56px 0 110px;
}

.pk-intro {
  text-align: center;
  max-width: 46ch;
  margin: 0 auto 36px;
}

.pk-intro .hero__eyebrow {
  margin-bottom: 18px;
}

.pk-intro h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}

.pk-intro p {
  color: var(--ink-soft);
  margin: 0;
  line-height: 1.6;
}

/* ---------------- TABS ---------------- */
.pk-tabs {
  display: flex;
  justify-content: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px;
  max-width: fit-content;
  margin: 0 auto 40px;
}

.pk-tab {
  border: none;
  background: transparent;
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.pk-tab:hover {
  color: var(--ink);
}

.pk-tab.is-active {
  background: var(--ink);
  color: #fff;
}

/* ---------------- PANELS ---------------- */
.pk-panel {
  display: none;
}

.pk-panel.is-active {
  display: block;
}

.pk-panel__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.pk-panel__head h2 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}

.pk-panel__head p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

/* ---------------- RANGE PICKER (tabel lengkap) ---------------- */
.pk-range {
  display: flex;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 4px;
  border-radius: 12px;
}

.pk-range__btn {
  border: none;
  background: transparent;
  padding: 8px 14px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.pk-range__btn:hover {
  color: var(--ink);
}

.pk-range__btn.is-active {
  background: var(--accent);
  color: #fff;
}

/* ---------------- GRID TABLE ---------------- */
.pk-grid-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  padding: 4px;
}

.pk-grid {
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
  font-family: var(--font-mono);
}

.pk-grid th,
.pk-grid td {
  min-width: 42px;
  height: 40px;
  text-align: center;
  font-size: 0.8rem;
  padding: 0 4px;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.pk-grid thead th {
  position: sticky;
  top: 0;
  background: var(--surface);
  color: var(--ink-soft);
  font-weight: 600;
  z-index: 2;
}

.pk-grid td.pk-axis,
.pk-grid th.pk-corner {
  position: sticky;
  left: 0;
  background: var(--surface);
  font-weight: 700;
  color: var(--accent-ink);
  z-index: 3;
}

.pk-grid th.pk-corner {
  z-index: 4;
  color: var(--ink-soft);
}

.pk-grid tbody td {
  color: var(--ink);
  cursor: default;
}

.pk-grid tbody tr:nth-child(even) td:not(.pk-axis) {
  background: rgba(27, 31, 59, 0.02);
}

.pk-grid td.is-hl-row,
.pk-grid td.is-hl-col {
  background: rgba(61, 90, 254, 0.1);
}

.pk-grid td.is-hl-cell {
  background: var(--highlight);
  color: var(--ink);
  font-weight: 700;
  border-radius: 8px;
}

/* ---------------- PER ANGKA ---------------- */
.pk-number-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.pk-number-picker button {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  transition: transform 120ms var(--ease), background var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.pk-number-picker button:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.pk-number-picker button.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.pk-worksheet {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 10px;
}

.pk-worksheet__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(10px);
  animation: row-in 420ms var(--ease) forwards;
}

@keyframes row-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.pk-worksheet__row .eq {
  color: var(--accent-ink);
}

.pk-worksheet__empty {
  color: var(--ink-soft);
  font-size: 0.92rem;
  padding: 24px 4px;
}

/* ---------------- LATIHAN / QUIZ ---------------- */
.pk-quiz-setup {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  max-width: 460px;
  margin: 0 auto;
}

.pk-setup-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pk-setup-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.pk-chip-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.pk-chip {
  border: 1px solid var(--line);
  background: var(--bg);
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease);
}

.pk-chip:hover {
  border-color: var(--accent);
}

.pk-chip.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.pk-start-btn {
  justify-content: center;
  margin-top: 4px;
}

/* quiz-run */
.pk-quiz-run {
  max-width: 460px;
  margin: 0 auto;
}

.pk-quiz-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.pk-quiz-progress {
  flex: 1;
  min-width: 160px;
}

.pk-quiz-progress span {
  font-size: 0.78rem;
  color: var(--ink-soft);
  font-family: var(--font-mono);
}

.pk-progress-track {
  height: 6px;
  border-radius: 999px;
  background: var(--line);
  overflow: hidden;
  margin-top: 6px;
}

.pk-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width var(--dur-med) var(--ease);
}

.pk-quiz-meta {
  display: flex;
  gap: 8px;
}

.pk-meta-pill {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(61, 90, 254, 0.1);
  color: var(--accent-ink);
}

.pk-meta-pill--streak {
  background: rgba(255, 200, 87, 0.22);
  color: #8a6300;
}

.pk-question-card {
  background: var(--ink);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  text-align: center;
  transition: transform 120ms var(--ease);
}

.pk-question-card.is-correct {
  animation: card-correct 380ms var(--ease);
}

.pk-question-card.is-wrong {
  animation: card-wrong 380ms var(--ease);
}

@keyframes card-correct {
  0% { transform: scale(1); }
  40% { transform: scale(1.03); }
  100% { transform: scale(1); }
}

@keyframes card-wrong {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

.pk-question {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 7vw, 2.6rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 24px;
}

#quiz-form {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.pk-answer-input {
  width: 120px;
  border: none;
  border-radius: 12px;
  padding: 13px 16px;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  text-align: center;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.pk-answer-input::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

.pk-answer-input:focus {
  outline: 2px solid var(--highlight);
  outline-offset: 2px;
  background: rgba(255, 255, 255, 0.16);
}

.pk-feedback {
  margin-top: 16px;
  min-height: 1.3em;
  font-size: 0.88rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.75);
}

.pk-feedback.is-correct {
  color: #6fe3b4;
}

.pk-feedback.is-wrong {
  color: #ff9a8f;
}

/* quiz-result */
.pk-quiz-result {
  max-width: 460px;
  margin: 0 auto;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
}

.pk-result-badge {
  font-size: 2.4rem;
  margin-bottom: 8px;
}

.pk-quiz-result h2 {
  font-family: var(--font-display);
  margin: 0 0 24px;
  font-size: 1.4rem;
}

.pk-result-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 28px;
}

.pk-stat-box {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 6px;
}

.pk-stat-box b {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-ink);
}

.pk-stat-box span {
  font-size: 0.72rem;
  color: var(--ink-soft);
}

.pk-result-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 520px) {
  .pk-result-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .pk-quiz-setup,
  .pk-quiz-result {
    padding: 24px 20px;
  }
}