/* ==========================================================================
   HENKAN QUIZ STYLES — Modern, Premium, Full Dark Mode Support
   ========================================================================== */

/* ── Keyframes ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes gradientMove {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes correctPop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.06); }
  100% { transform: scale(1); }
}
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   SETUP PANEL
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.henkan-setup-panel {
  background: var(--white, #fff);
  border-radius: 1.75rem;
  padding: 2rem;
  border: 1px solid var(--gray-200, #e5e7eb);
  box-shadow: 0 4px 24px rgba(0,0,0,.06);
  animation: fadeInUp .45s ease-out;
  color: var(--gray-900, #111827);
}
.henkan-setup-panel h3 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .03em;
  text-transform: uppercase;
  color: var(--gray-500, #6b7280);
  margin: 0 0 .75rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.henkan-setup-panel h3::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1em;
  border-radius: 99px;
  background: linear-gradient(135deg,#6366f1,#a855f7);
  flex-shrink: 0;
}

/* Dark mode setup panel */
html.dark-mode .henkan-setup-panel {
  background: #1e293b;
  border-color: rgba(255,255,255,.07);
  box-shadow: 0 4px 24px rgba(0,0,0,.3);
  color: #f1f5f9;
}
html.dark-mode .henkan-setup-panel h3 {
  color: #94a3b8;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   MODE TOGGLES (Jenis / Target / Jumlah)
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.henkan-mode-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.25rem;
}
.henkan-sub-btn {
  padding: .55rem 1.1rem;
  border: 1.5px solid var(--gray-200, #e5e7eb);
  background: var(--gray-50, #f9fafb);
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
  font-size: .88rem;
  color: var(--gray-700, #374151);
  transition: all .2s ease;
  line-height: 1.4;
}
.henkan-sub-btn:hover {
  border-color: #a78bfa;
  background: #f5f3ff;
  color: #5b21b6;
  transform: translateY(-1px);
}
.henkan-sub-btn.active {
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(99,102,241,.3);
}
.henkan-sub-btn.active:hover {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  transform: translateY(-1px);
}

/* Dark mode toggles */
html.dark-mode .henkan-sub-btn {
  background: #0f172a;
  border-color: rgba(255,255,255,.1);
  color: #cbd5e1;
}
html.dark-mode .henkan-sub-btn:hover {
  border-color: #a78bfa;
  background: rgba(167,139,250,.1);
  color: #c4b5fd;
}
html.dark-mode .henkan-sub-btn.active {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #fff;
  border-color: transparent;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   BAB GRID & PILLS
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.henkan-bab-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: .45rem;
  margin: .75rem 0;
}
@media (max-width:640px) { .henkan-bab-grid { grid-template-columns: repeat(7,1fr); } }
@media (max-width:420px) { .henkan-bab-grid { grid-template-columns: repeat(5,1fr); } }

.henkan-bab-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: .55rem .2rem;
  border-radius: 12px;
  border: 1.5px solid var(--gray-200, #e5e7eb);
  background: var(--gray-50, #f9fafb);
  color: var(--gray-700, #374151);
  cursor: pointer;
  transition: all .22s cubic-bezier(.34,1.56,.64,1);
  user-select: none;
}
.henkan-bab-pill:hover:not(:disabled) {
  transform: translateY(-3px) scale(1.06);
  border-color: #a78bfa;
  box-shadow: 0 6px 12px rgba(99,102,241,.12);
}
.henkan-bab-pill:active { transform: scale(.95); }

.hbab-num { font-size: 1rem; font-weight: 800; line-height: 1; }
.hbab-lbl { font-size: .6rem; text-transform: uppercase; letter-spacing: .04em; font-weight: 600; opacity: .55; margin-top: 2px; }

/* Color groups (light) */
.henkan-bab-pill:nth-child(n+1):nth-child(-n+10)  { border-color:rgba(239,68,68,.2);  background:rgba(254,242,242,.6); }
.henkan-bab-pill:nth-child(n+11):nth-child(-n+20) { border-color:rgba(249,115,22,.2); background:rgba(255,247,237,.6); }
.henkan-bab-pill:nth-child(n+21):nth-child(-n+30) { border-color:rgba(234,179,8,.2);  background:rgba(254,252,232,.6); }
.henkan-bab-pill:nth-child(n+31):nth-child(-n+40) { border-color:rgba(34,197,94,.2);  background:rgba(240,253,244,.6); }
.henkan-bab-pill:nth-child(n+41):nth-child(-n+50) { border-color:rgba(14,165,233,.2); background:rgba(240,249,255,.6); }

.henkan-bab-pill:nth-child(n+1):nth-child(-n+10)  .hbab-num { color:#dc2626; }
.henkan-bab-pill:nth-child(n+11):nth-child(-n+20) .hbab-num { color:#ea580c; }
.henkan-bab-pill:nth-child(n+21):nth-child(-n+30) .hbab-num { color:#ca8a04; }
.henkan-bab-pill:nth-child(n+31):nth-child(-n+40) .hbab-num { color:#16a34a; }
.henkan-bab-pill:nth-child(n+41):nth-child(-n+50) .hbab-num { color:#0284c7; }

/* Selected pills */
.henkan-bab-pill.selected { border-color:transparent !important; }
.henkan-bab-pill.selected:nth-child(n+1):nth-child(-n+10)  { background:linear-gradient(135deg,#f87171,#dc2626)!important; box-shadow:0 4px 10px rgba(220,38,38,.3)!important; }
.henkan-bab-pill.selected:nth-child(n+11):nth-child(-n+20) { background:linear-gradient(135deg,#fb923c,#ea580c)!important; box-shadow:0 4px 10px rgba(234,88,12,.3)!important; }
.henkan-bab-pill.selected:nth-child(n+21):nth-child(-n+30) { background:linear-gradient(135deg,#facc15,#ca8a04)!important; box-shadow:0 4px 10px rgba(202,138,4,.3)!important; }
.henkan-bab-pill.selected:nth-child(n+31):nth-child(-n+40) { background:linear-gradient(135deg,#4ade80,#16a34a)!important; box-shadow:0 4px 10px rgba(22,163,74,.3)!important; }
.henkan-bab-pill.selected:nth-child(n+41):nth-child(-n+50) { background:linear-gradient(135deg,#38bdf8,#0284c7)!important; box-shadow:0 4px 10px rgba(2,132,199,.3)!important; }
.henkan-bab-pill.selected .hbab-num { color:#fff!important; }
.henkan-bab-pill.selected .hbab-lbl { color:rgba(255,255,255,.85)!important; }

/* Dark mode pills */
html.dark-mode .henkan-bab-pill {
  background: rgba(15,23,42,.7);
  border-color: rgba(255,255,255,.1);
  color: #e2e8f0;
}
html.dark-mode .henkan-bab-pill:nth-child(n+1):nth-child(-n+10)  { background:rgba(239,68,68,.12);  border-color:rgba(239,68,68,.3); }
html.dark-mode .henkan-bab-pill:nth-child(n+11):nth-child(-n+20) { background:rgba(249,115,22,.12); border-color:rgba(249,115,22,.3); }
html.dark-mode .henkan-bab-pill:nth-child(n+21):nth-child(-n+30) { background:rgba(234,179,8,.12);  border-color:rgba(234,179,8,.3); }
html.dark-mode .henkan-bab-pill:nth-child(n+31):nth-child(-n+40) { background:rgba(34,197,94,.12);  border-color:rgba(34,197,94,.3); }
html.dark-mode .henkan-bab-pill:nth-child(n+41):nth-child(-n+50) { background:rgba(14,165,233,.12); border-color:rgba(14,165,233,.3); }
html.dark-mode .henkan-bab-pill:nth-child(n+1):nth-child(-n+10)  .hbab-num { color:#fca5a5; }
html.dark-mode .henkan-bab-pill:nth-child(n+11):nth-child(-n+20) .hbab-num { color:#fdba74; }
html.dark-mode .henkan-bab-pill:nth-child(n+21):nth-child(-n+30) .hbab-num { color:#fde047; }
html.dark-mode .henkan-bab-pill:nth-child(n+31):nth-child(-n+40) .hbab-num { color:#86efac; }
html.dark-mode .henkan-bab-pill:nth-child(n+41):nth-child(-n+50) .hbab-num { color:#7dd3fc; }

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   INPUT KUSTOM
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.henkan-input-kustom {
  width: 72px;
  padding: .45rem .6rem;
  border-radius: 8px;
  border: 1.5px solid var(--gray-300, #d1d5db);
  background: var(--white, #fff);
  color: var(--gray-900, #111827);
  font-weight: 700;
  font-size: .95rem;
  font-family: inherit;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.henkan-input-kustom:focus {
  border-color: #6366f1;
  box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
html.dark-mode .henkan-input-kustom {
  background: #0f172a;
  border-color: rgba(255,255,255,.15);
  color: #f1f5f9;
}
html.dark-mode .henkan-input-kustom:focus {
  border-color: #818cf8;
  box-shadow: 0 0 0 3px rgba(129,140,248,.2);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   PROGRESS BAR
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.henkan-progress-bar {
  width: 100%;
  height: 8px;
  background: var(--gray-200, #e5e7eb);
  border-radius: 99px;
  margin-bottom: 1.5rem;
  overflow: hidden;
}
html.dark-mode .henkan-progress-bar { background: rgba(255,255,255,.08); }

.henkan-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #6366f1, #a855f7, #ec4899, #6366f1);
  background-size: 300% 100%;
  width: 0%;
  border-radius: 99px;
  transition: width .5s cubic-bezier(.4,0,.2,1);
  animation: gradientMove 3s linear infinite;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   QUIZ BOARD + QUESTION CARD
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.henkan-board {
  max-width: 720px;
  margin: 0 auto;
  animation: fadeInUp .4s ease-out;
}

.henkan-qcard {
  background: var(--white, #fff);
  border-radius: 24px;
  padding: 2.5rem 2rem 2rem;
  text-align: center;
  border: 1px solid var(--gray-200, #e5e7eb);
  box-shadow: 0 8px 32px rgba(99,102,241,.08), 0 1px 3px rgba(0,0,0,.04);
  margin-bottom: 1.75rem;
  overflow: hidden;
  position: relative;
  color: var(--gray-900, #111827);
}
.henkan-qcard::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: linear-gradient(90deg, #6366f1, #a855f7, #ec4899);
  border-radius: 24px 24px 0 0;
}
html.dark-mode .henkan-qcard {
  background: #1e293b;
  border-color: rgba(255,255,255,.07);
  box-shadow: 0 8px 32px rgba(0,0,0,.35);
  color: #f1f5f9;
}

/* Target mode badge */
.henkan-word-target {
  display: inline-block;
  padding: .35rem 1.25rem;
  border-radius: 99px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  letter-spacing: .03em;
  box-shadow: 0 4px 12px rgba(99,102,241,.3);
}

/* Main Japanese word */
.henkan-word-main {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.1;
  display: block;
  margin: .25rem 0;
  color: var(--gray-900, #111827);
}
html.dark-mode .henkan-word-main { color: #f1f5f9; }

/* TTS button */
.henkan-tts-btn {
  background: rgba(99,102,241,.1);
  color: #6366f1;
  border: none;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  margin-left: 12px;
  vertical-align: middle;
  transition: all .25s cubic-bezier(.34,1.56,.64,1);
}
.henkan-tts-btn:hover {
  background: #6366f1;
  color: #fff;
  transform: scale(1.15);
  box-shadow: 0 6px 16px rgba(99,102,241,.35);
}
html.dark-mode .henkan-tts-btn { background: rgba(129,140,248,.15); color: #818cf8; }
html.dark-mode .henkan-tts-btn:hover { background: #818cf8; color: #fff; }

/* Indonesian translation */
.henkan-word-indonesian {
  color: var(--gray-500, #6b7280);
  font-size: 1.1rem;
  font-weight: 500;
  margin: .75rem 0 .5rem;
}
html.dark-mode .henkan-word-indonesian { color: #94a3b8; }

/* Group badge (Godan/Ichidan) */
.henkan-group-badge {
  display: inline-block;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  font-size: .8rem;
  font-weight: 700;
  padding: .25rem .75rem;
  border-radius: 8px;
  margin-top: .5rem;
  box-shadow: 0 3px 8px rgba(16,185,129,.25);
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   ANSWER OPTIONS
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.henkan-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.75rem;
}
@media (max-width:560px) { .henkan-options { grid-template-columns: 1fr; } }

.henkan-opt-btn {
  position: relative;
  padding: 1.1rem 1rem;
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: 14px;
  border: 2px solid var(--gray-200, #e5e7eb);
  background: var(--gray-50, #f9fafb);
  color: var(--gray-800, #1f2937);
  cursor: pointer;
  transition: all .2s cubic-bezier(.2,.8,.2,1);
  font-family: inherit;
  text-align: center;
  line-height: 1.3;
}
html.dark-mode .henkan-opt-btn {
  border-color: rgba(255,255,255,.1);
  background: #0f172a;
  color: #e2e8f0;
}
.henkan-opt-btn:hover:not(:disabled) {
  border-color: #6366f1;
  background: #eef2ff;
  color: #4338ca;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(99,102,241,.14);
}
html.dark-mode .henkan-opt-btn:hover:not(:disabled) {
  border-color: #818cf8;
  background: rgba(99,102,241,.12);
  color: #c7d2fe;
}
.henkan-opt-btn:active:not(:disabled) { transform: translateY(-1px); }

/* Correct / Wrong */
.henkan-opt-btn.correct {
  background: linear-gradient(135deg, #10b981, #059669) !important;
  border-color: transparent !important;
  color: #fff !important;
  box-shadow: 0 6px 16px rgba(16,185,129,.35) !important;
  animation: correctPop .4s ease-out;
}
.henkan-opt-btn.wrong {
  background: linear-gradient(135deg, #ef4444, #dc2626) !important;
  border-color: transparent !important;
  color: #fff !important;
  box-shadow: 0 6px 16px rgba(239,68,68,.3) !important;
}
.henkan-opt-btn:disabled { cursor: not-allowed; opacity: .75; }

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   FINISH / RESULT SCREEN
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.henkan-finish {
  text-align: center;
  padding: 3.5rem 2rem 2.5rem;
  color: var(--gray-800, #1f2937);
}
html.dark-mode .henkan-finish { color: #f1f5f9; }

.henkan-score {
  font-size: 5rem;
  font-weight: 900;
  background: linear-gradient(135deg, #6366f1, #ec4899);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: .75rem 0;
  display: block;
  line-height: 1;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   BACK BUTTON + COUNTER
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.henkan-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}
.henkan-counter {
  font-size: .9rem;
  font-weight: 700;
  color: var(--gray-500, #6b7280);
  background: var(--gray-100, #f3f4f6);
  padding: .35rem .9rem;
  border-radius: 99px;
}
html.dark-mode .henkan-counter {
  color: #94a3b8;
  background: rgba(255,255,255,.07);
}