/* style.css (Updated with Home Button Style) */

@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@400;500;600;700&display=swap');

/* --- Global & Body Styles --- */
body {
  font-family: 'Hind Siliguri', sans-serif;
  transition: background 0.4s ease, color 0.4s ease;
}

main {
  transition: background 0.4s ease, border-color 0.4s ease;
  border-radius: 24px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  border: 1px solid #e2e8f0;
}

h1,
h2,
h3 {
  transition: color 0.4s ease;
}

/* --- Day Mode --- */
body.day-mode {
  background: #f0f4f8;
}

body.day-mode main {
  background: #ffffff;
}

body.day-mode h1,
body.day-mode h2,
body.day-mode h3 {
  color: #1e293b;
}

body.day-mode .option-btn {
  background-color: #f8fafc;
  border-color: #e2e8f0;
}

body.day-mode .option-btn:hover {
  border-color: #3b82f6;
}

body.day-mode .nav-btn {
  background: #e2e8f0;
  color: #475569;
}

body.day-mode .nav-btn.active-nav-btn {
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
  color: white;
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4); /* Deeper shadow for active state */
}

body.day-mode .home-btn {
  background: linear-gradient(135deg, #1d4ed8, #3b82f6);
  color: white;
}

body.day-mode #timer-container {
  background-color: #fff1f2;
  border-color: #f43f5e;
  color: #be123c;
}

body.day-mode .review-card {
  background-color: #f8fafc;
}

body.day-mode .review-card strong {
  color: #334155;
}

body.day-mode .action-btn.gray {
  background: linear-gradient(135deg, #475569, #64748b);
}

/* --- Dark Mode --- */
body.dark-mode {
  background: #111827;
  color: #d1d5db;
}

body.dark-mode main {
  background: #1f2937;
  border-color: #374151;
}

body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3 {
  color: #f9fafb;
}

body.dark-mode .option-btn {
  background-color: #374151;
  border-color: #4b5563;
  color: #f3f4f6;
}

body.dark-mode .option-btn:hover {
  border-color: #60a5fa;
}

body.dark-mode .nav-btn {
  background: #4b5563;
  color: #cbd5e1;
}

body.dark-mode .nav-btn.active-nav-btn {
  background: linear-gradient(135deg, #60a5fa, #93c5fd);
  color: #1e293b;
  box-shadow: 0 8px 20px rgba(96, 165, 250, 0.4); /* Deeper shadow for active state */
}

body.dark-mode .home-btn {
  background: linear-gradient(135deg, #3b82f6, #60a5fa);
  color: white;
}

body.dark-mode #timer-container {
  background-color: #581c87;
  border-color: #c084fc;
  color: #f3e8ff;
}

body.dark-mode .review-card {
  background-color: #374151;
}

body.dark-mode .review-card strong {
  color: #f1f5f9;
}

body.dark-mode .action-btn.gray {
  background: linear-gradient(135deg, #374151, #4b5563);
}

/* --- Component Styles --- */
.option-btn {
  display: flex;
  align-items: center;
  border-radius: 16px;
  border: 2px solid;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
  transition: all 0.2s ease-in-out;
  font-weight: 500;
  font-size: 16px;
}

.option-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(59, 130, 246, 0.1);
}

.option-btn.correct {
  background: #10b981 !important;
  color: white;
  border-color: #059669;
  animation: pulse 0.6s ease;
}

.option-btn.incorrect {
  background: #ef4444 !important;
  color: white;
  border-color: #b91c1c;
  animation: shake 0.5s ease;
}

/* Navigation & Home Buttons */
.nav-btn,
.home-btn {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: transform 0.15s ease-in-out, box-shadow 0.15s ease-in-out; /* Smooth transitions */
}

.nav-btn:hover,
.home-btn:hover {
  transform: translateY(-3px) scale(1.1); /* Enhanced hover effect */
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2); /* More pronounced shadow */
}

.nav-btn.active-nav-btn {
  transform: scale(1.15); /* Slightly larger active scale */
  box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4); /* Deeper shadow for active state */
}

/* Add a subtle pulse animation to the active button */
.nav-btn.active-nav-btn {
    animation: pulse-active 1.5s infinite cubic-bezier(0.4, 0, 0.6, 1);
}

@keyframes pulse-active {
    0% {
        box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
    }
    50% {
        box-shadow: 0 8px 20px rgba(59, 130, 246, 0.7);
    }
    100% {
        box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
    }
}

.home-btn {
  font-size: 1.5rem;
}

/* আইকনের জন্য বড় ফন্ট */

/* Action Buttons */
.action-btn {
  padding: 10px 24px;
  font-weight: 600;
  border-radius: 12px;
  border: none;
  color: white;
  cursor: pointer;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.2);
  transition: all 0.2s ease;
}

.action-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.3);
}

.action-btn.green {
  background: linear-gradient(135deg, #16a34a, #22c55e);
  box-shadow: 0 4px 15px rgba(22, 163, 74, 0.2);
}

/* Review Card */
.review-card {
  border-radius: 16px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  padding: 20px;
  margin-bottom: 20px;
  border-left: 6px solid;
  transition: all 0.2s ease;
}

.review-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
}

.review-card.correct {
  border-color: #22c55e;
}

.review-card.incorrect {
  border-color: #ef4444;
}

.review-card.timeout {
  border-color: #f59e0b;
}

.review-card h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.review-card p {
  font-size: 0.95rem;
  line-height: 1.6;
}

@keyframes pulse {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.05);
  }
}

@keyframes shake {

  0%,
  100% {
    transform: translateX(0);
  }

  25%,
  75% {
    transform: translateX(-4px);
  }

  50% {
    transform: translateX(4px);
  }
}