/* ============================================================
   DigitalKiddo™ Maths — Latih Tubi (Practice Exercises)
   ============================================================
   Skill-based practice cards + tiered Latihan-picker modal.

   The collapsible accordion shell (header, chevron, count pill,
   expanding content) intentionally REUSES the .sifir-header /
   .sifir-content classes from learning.css so both sections
   stay visually identical. Only card/modal styles live here.
   ============================================================ */

/* ---- Category cards grid — 3 desktop · 2 tablet · 1 mobile -- */
.latih-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.1rem;
}

/* Per-card colour themes (same palette as sifir/topic cards). */
.latih-card[data-color="blue"],   .latih-modal[data-color="blue"]   { --c: #4dabf7; --c-ink: #1565a8; }
.latih-card[data-color="green"],  .latih-modal[data-color="green"]  { --c: #2bcb78; --c-ink: #128a4f; }
.latih-card[data-color="orange"], .latih-modal[data-color="orange"] { --c: #ff9f43; --c-ink: #c46a12; }
.latih-card[data-color="purple"], .latih-modal[data-color="purple"] { --c: #845ef7; --c-ink: #5a37c4; }
.latih-card[data-color="yellow"], .latih-modal[data-color="yellow"] { --c: #f7b500; --c-ink: #a87900; }
.latih-card[data-color="pink"],   .latih-modal[data-color="pink"]   { --c: #fd79a8; --c-ink: #c43e74; }

.latih-card {
  --c: var(--primary); --c-ink: var(--primary);
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  text-align: center; cursor: pointer;
  background: color-mix(in srgb, var(--c) 9%, var(--surface));
  border: 2px solid color-mix(in srgb, var(--c) 30%, transparent);
  border-radius: var(--radius);
  padding: 1.4rem 1.1rem 1.2rem;
  transition: transform 0.22s cubic-bezier(0.34,1.56,0.64,1), box-shadow var(--transition), border-color var(--transition);
}
.latih-card:hover, .latih-card:focus-visible {
  transform: translateY(-5px);
  border-color: var(--c);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--c) 28%, transparent);
  outline: none;
}
.latih-card:active { transform: translateY(-2px) scale(0.99); }

/* Staggered pop-in each time the accordion is expanded
   (.animate-in is toggled by latih-tubi.js). */
@keyframes latihPop {
  from { opacity: 0; transform: translateY(14px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0)    scale(1); }
}
.sifir-content.animate-in .latih-card {
  animation: latihPop 0.38s cubic-bezier(0.34,1.56,0.64,1) both;
}
.sifir-content.animate-in .latih-card:nth-child(2) { animation-delay: 0.06s; }
.sifir-content.animate-in .latih-card:nth-child(3) { animation-delay: 0.12s; }
.sifir-content.animate-in .latih-card:nth-child(4) { animation-delay: 0.18s; }
.sifir-content.animate-in .latih-card:nth-child(5) { animation-delay: 0.24s; }
.sifir-content.animate-in .latih-card:nth-child(6) { animation-delay: 0.30s; }

.latih-card-icon {
  font-size: 2.4rem; line-height: 1;
  filter: drop-shadow(0 3px 6px color-mix(in srgb, var(--c) 35%, transparent));
}
.latih-card-title {
  font-family: 'Fredoka One', cursive;
  font-size: 1.35rem; color: var(--c-ink); margin: 0;
}
.latih-card-desc {
  font-size: 0.85rem; font-weight: 600; color: var(--gray-600);
  line-height: 1.45; margin: 0; min-height: 2.5em;
}

/* Difficulty-tier chips — one per level, lit when the tier is done */
.latih-tier-row { display: flex; gap: 0.35rem; justify-content: center; flex-wrap: wrap; }
.latih-tier-chip {
  font-size: 0.62rem; letter-spacing: -1.5px; line-height: 1;
  padding: 0.28rem 0.5rem 0.24rem; border-radius: 999px;
  background: color-mix(in srgb, var(--c) 10%, var(--surface));
  border: 1.5px solid color-mix(in srgb, var(--c) 22%, transparent);
  filter: grayscale(85%); opacity: 0.65;
  transition: filter 0.3s ease, opacity 0.3s ease, transform 0.3s ease;
}
.latih-tier-chip.full {
  filter: none; opacity: 1; transform: scale(1.08);
  border-color: var(--c);
  background: color-mix(in srgb, var(--c) 22%, var(--surface));
}

/* Meta row — exercise-count pill + completion percentage */
.latih-card-meta {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; margin-top: 0.35rem;
}
.latih-pill {
  font-size: 0.74rem; font-weight: 800; letter-spacing: 0.02em;
  color: var(--c-ink);
  background: color-mix(in srgb, var(--c) 16%, var(--surface));
  border-radius: 999px; padding: 0.22rem 0.65rem;
}
.latih-pct {
  font-family: 'Fredoka One', cursive;
  font-size: 0.95rem; color: var(--c-ink);
}

/* Progress bar — animated fill with a soft moving shimmer */
.latih-progress {
  width: 100%; height: 9px; border-radius: 20px; overflow: hidden;
  background: color-mix(in srgb, var(--c) 16%, var(--surface));
}
@keyframes latihShimmer {
  from { background-position: 0 0; }
  to   { background-position: 44px 0; }
}
.latih-progress-fill {
  height: 100%; border-radius: 20px;
  background:
    linear-gradient(105deg, transparent 35%, rgba(255,255,255,0.35) 50%, transparent 65%) 0 0/44px 100% repeat-x,
    linear-gradient(90deg, var(--c), color-mix(in srgb, var(--c) 65%, var(--c-ink)));
  transition: width 0.5s cubic-bezier(0.22,1,0.36,1);
}
/* Shimmer only while the card is hovered/focused — keeps the page
   free of perpetual repaints (battery-friendly on tablets). */
.latih-card:hover .latih-progress-fill,
.latih-card:focus-visible .latih-progress-fill {
  animation: latihShimmer 1.6s linear infinite;
}

/* Mulakan button — inherit .btn styling, theme it to the card */
.latih-card .latih-start {
  margin-top: 0.6rem; width: 100%;
  background: var(--c); border-color: var(--c);
}
.latih-card .latih-start:hover { filter: brightness(1.07); }

/* ---- Latihan-picker / quiz modal --------------------------- */
.modal-overlay .modal:has(.latih-modal) { max-width: 560px; width: 100%; }
.latih-modal { --c: var(--primary); --c-ink: var(--primary); width: 100%; }

.latih-modal-head { text-align: center; margin-bottom: 1.1rem; }
.latih-modal-icon { font-size: 2.6rem; line-height: 1; display: inline-block; }
.latih-modal-title {
  font-family: 'Fredoka One', cursive;
  font-size: 1.6rem; margin: 0.2rem 0 0.1rem; color: var(--c-ink);
}
.latih-modal-sub { font-size: 0.85rem; color: var(--gray-600); font-weight: 700; margin: 0; }
.latih-modal-bar { max-width: 260px; margin: 0.7rem auto 0; }

/* Difficulty tiers inside the picker */
.latih-tiers { display: flex; flex-direction: column; gap: 1rem; }
.latih-tier-head {
  display: flex; align-items: center; gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.latih-tier-stars { font-size: 0.85rem; letter-spacing: -2px; }
.latih-tier-name {
  font-family: 'Fredoka One', cursive;
  font-size: 0.98rem; color: var(--c-ink);
}
.latih-tier-count {
  margin-left: auto;
  font-size: 0.74rem; font-weight: 800; color: var(--gray-600);
  background: var(--gray-100, #f1f2f6);
  border-radius: 999px; padding: 0.18rem 0.6rem;
}
.latih-tier-count.full {
  color: var(--c-ink);
  background: color-mix(in srgb, var(--c) 20%, var(--surface));
}

/* Latihan set buttons — 3 per tier row */
.latih-set-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
}
.latih-set-btn {
  display: flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.75rem 0.5rem; cursor: pointer;
  font-weight: 800; font-size: 0.88rem; color: var(--c-ink);
  background: color-mix(in srgb, var(--c) 9%, var(--surface));
  border: 2px solid color-mix(in srgb, var(--c) 30%, transparent);
  border-radius: var(--radius);
  transition: transform 0.18s ease, box-shadow var(--transition), border-color var(--transition);
}
.latih-set-btn:hover, .latih-set-btn:focus-visible {
  transform: translateY(-3px);
  border-color: var(--c);
  box-shadow: 0 8px 18px color-mix(in srgb, var(--c) 25%, transparent);
  outline: none;
}
.latih-set-btn.done {
  background: color-mix(in srgb, var(--c) 22%, var(--surface));
  border-color: var(--c);
}

/* Large-text accessibility mode */
body.large-text .latih-card-desc { font-size: 0.98rem; }
body.large-text .latih-set-btn { font-size: 1.02rem; }

/* ---- Responsive -------------------------------------------- */
@media (max-width: 900px) {
  .latih-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .latih-grid { grid-template-columns: 1fr; gap: 0.85rem; }
}

/* Tablet landscape (e.g. 1024×600) — short viewport: tighten the
   modal so the tier list needs minimal scrolling. The shared
   .modal already caps to 100dvh and scrolls internally. */
@media (max-height: 640px) {
  .modal-overlay .modal:has(.latih-modal) { padding: 1.4rem 1.6rem; }
  .latih-modal-head { margin-bottom: 0.7rem; }
  .latih-modal-icon { font-size: 1.9rem; }
  .latih-modal-title { font-size: 1.3rem; }
  .latih-modal-bar { margin-top: 0.4rem; }
  .latih-tiers { gap: 0.6rem; }
  .latih-tier-head { margin-bottom: 0.35rem; }
  .latih-set-btn { padding: 0.55rem 0.5rem; }
}

/* Respect users who prefer less motion */
@media (prefers-reduced-motion: reduce) {
  .sifir-content.animate-in .latih-card { animation: none; }
  .latih-progress-fill { animation: none; }
  .latih-card, .latih-set-btn { transition: none; }
}