/* =========================================================
   GEOGEBRA & MODERN EDTECH CUSTOM STYLES
   Similarity Speed Challenge Grade 9 (ม.3)
   ========================================================= */

/* Geogebra Grid Background Pattern */
.geogebra-grid {
  background-color: #ffffff;
  background-image: 
    linear-gradient(#f1f5f9 1px, transparent 1px),
    linear-gradient(90deg, #f1f5f9 1px, transparent 1px);
  background-size: 20px 20px;
  background-position: -1px -1px;
}

/* Hide scrollbar for step navigation on mobile */
.no-scrollbar::-webkit-scrollbar {
  display: none;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

/* Step Navigation Button Styles */
.step-nav-btn {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 500;
  color: #64748b;
  background-color: transparent;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
  border: 1px solid transparent;
}

@media (min-width: 640px) {
  .step-nav-btn {
    font-size: 0.875rem;
    padding: 0.375rem 0.875rem;
  }
}

.step-nav-btn:hover {
  color: #1e293b;
  background-color: #f1f5f9;
}

.step-nav-btn.active {
  color: #1d4ed8;
  background-color: #eff6ff;
  border-color: #bfdbfe;
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(37, 99, 235, 0.08);
}

.step-nav-btn .step-num {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 9999px;
  background-color: #e2e8f0;
  color: #475569;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  transition: all 0.2s ease;
}

.step-nav-btn.active .step-num {
  background-color: #2563eb;
  color: #ffffff;
}

.step-divider {
  width: 1rem;
  height: 2px;
  background-color: #e2e8f0;
  flex-shrink: 0;
}

/* Locked step nav button */
.step-nav-btn.locked {
  opacity: 0.45;
  cursor: not-allowed !important;
  filter: grayscale(0.5);
  background-color: transparent !important;
  border-color: transparent !important;
}

.step-nav-btn.locked:hover {
  background-color: transparent !important;
  color: #64748b !important;
}

.step-nav-btn.locked .step-num {
  background-color: #f1f5f9 !important;
  color: #94a3b8 !important;
}

/* Shake Animation for Attention */
@keyframes shake-attention {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.animate-shake {
  animation: shake-attention 0.4s ease-in-out;
}

/* Timer Warning Styles */
#timer-badge.timer-warning {
  background-color: #fef2f2 !important;
  border-color: #fca5a5 !important;
  color: #b91c1c !important;
  animation: pulse-danger 1s infinite ease-in-out;
}

#timer-badge.timer-warning #timer-icon {
  color: #dc2626 !important;
}

@keyframes pulse-danger {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* Interactive SVG Styling */
.geo-vertex {
  cursor: pointer;
  transition: transform 0.15s ease, fill 0.2s ease;
}

.geo-vertex:hover {
  transform: scale(1.3);
}

.geo-side-line {
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke 0.2s ease, stroke-width 0.2s ease;
}

/* Step 0 Options */
.step0-opt-btn.locked {
  pointer-events: none !important;
  opacity: 0.75;
}

.step0-opt-btn.selected-choice {
  border-color: #2563eb !important;
  background-color: #eff6ff !important;
  color: #1d4ed8 !important;
  box-shadow: 0 0 0 1px #2563eb;
}

/* Choice Cards (Step 1) */
.choice-card.locked {
  pointer-events: none !important;
  opacity: 0.75;
}

.choice-card.selected-choice {
  border-color: #2563eb !important;
  background-color: #f8faff !important;
  box-shadow: 0 4px 14px -2px rgba(37, 99, 235, 0.18) !important;
}

/* Step 2 Buttons */
.step2-btn.locked {
  pointer-events: none !important;
  opacity: 0.75;
}

.step2-btn.selected-choice {
  border-color: #2563eb !important;
  background-color: #2563eb !important;
  color: #ffffff !important;
}

/* Ratio Option Buttons (Step 3) */
.ratio-opt-btn.locked {
  pointer-events: none !important;
  opacity: 0.75;
}

.ratio-opt-btn.selected-choice {
  background-color: #2563eb !important;
  color: #ffffff !important;
  border-color: #1d4ed8 !important;
}

/* Step 4 Choice Buttons */
.step4-choice-btn.locked {
  pointer-events: none !important;
  opacity: 0.75;
}

.step4-choice-btn.selected-choice {
  border-color: #2563eb !important;
  background-color: #eff6ff !important;
  color: #1d4ed8 !important;
}

/* =========================================================
   LEADERBOARD & PODIUM STYLING
   ========================================================= */

.leaderboard-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-radius: 1rem;
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  transition: all 0.2s ease;
}

.leaderboard-row:hover {
  border-color: #cbd5e1;
  box-shadow: 0 2px 8px -2px rgba(0, 0, 0, 0.05);
}

/* Rank 1: Gold 🥇 */
.leaderboard-row.rank-1 {
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  border-color: #fcd34d;
  box-shadow: 0 4px 12px -2px rgba(245, 158, 11, 0.15);
}

.leaderboard-row.rank-1 .rank-badge {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(217, 119, 6, 0.3);
}

/* Rank 2: Silver 🥈 */
.leaderboard-row.rank-2 {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border-color: #cbd5e1;
}

.leaderboard-row.rank-2 .rank-badge {
  background: linear-gradient(135deg, #94a3b8, #64748b);
  color: #ffffff;
}

/* Rank 3: Bronze 🥉 */
.leaderboard-row.rank-3 {
  background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
  border-color: #fdba74;
}

.leaderboard-row.rank-3 .rank-badge {
  background: linear-gradient(135deg, #ea580c, #c2410c);
  color: #ffffff;
}

/* Highlight Current User */
.leaderboard-row.is-current-user {
  border: 2px solid #3b82f6 !important;
  position: relative;
}

.leaderboard-row.is-current-user::after {
  content: "★ คุณ";
  position: absolute;
  top: -9px;
  right: 16px;
  background-color: #2563eb;
  color: #ffffff;
  font-size: 10px;
  font-weight: 700;
  padding: 1px 8px;
  border-radius: 9999px;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.3);
}

.rank-badge {
  width: 2rem;
  height: 2rem;
  border-radius: 9999px;
  background-color: #f1f5f9;
  color: #475569;
  font-weight: 700;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Custom Modal Animation */
#modal-leaderboard:not(.hidden) > div,
#modal-qr:not(.hidden) > div {
  animation: modal-pop 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes modal-pop {
  0% {
    opacity: 0;
    transform: scale(0.94) translateY(8px);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* KaTeX Math Styling */
.katex {
  font-size: 1.05em;
  text-rendering: auto;
}
.katex-display {
  margin: 0.35em 0 !important;
}
.ratio-opt-btn .katex,
.step2-btn .katex,
.step4-choice-btn .katex {
  font-size: 1.1em;
}