body {
  background-color: #111;
  color: #eee;
  font-family: 'Montserrat', sans-serif;
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  text-align: center;
  margin-top: 30px;
}

.focus-logo {
  width: 200px;
  height: auto;
}

.quiz-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.quiz-container {
  background: #1a1a1a;
  border-radius: 15px;
  padding: 25px;
  width: 90%;
  max-width: 600px;
  box-shadow: 0 0 20px rgba(0,0,0,0.3);
}

.question-card {
  animation: fadeIn 0.5s ease;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 15px;
}

.opt-btn {
  background: #2c2c2c;
  color: #eee;
  border: none;
  border-radius: 10px;
  padding: 12px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.opt-btn:hover:not(.disabled) {
  transform: scale(1.03);
  background: #3a3a3a;
}
.opt-btn.correct {
  background-color: #256d3a;
  color: #fff;
}
.opt-btn.wrong {
  background-color: #6d2525;
  color: #fff;
}

.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 20px auto;
  width: 90%;
  max-width: 600px;
}

.nav-btn {
  background: #2e5339;
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 15px;
  cursor: pointer;
  transition: 0.2s ease;
}
.nav-btn:hover {
  background: #3a7a4d;
  transform: scale(1.05);
}

.progress {
  color: #aaa;
  font-size: 14px;
}

.final-box {
  text-align: center;
  background: #1a1a1a;
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 0 20px rgba(0,0,0,0.3);
  width: 90%;
  max-width: 500px;
  margin: 20px auto;
}

.primary {
  background-color: #2e5339;
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 16px;
  margin-top: 15px;
}
.primary:hover {
  background-color: #3a7a4d;
}

footer {
  text-align: center;
  font-size: 14px;
  color: #888;
  padding: 15px 0;
  border-top: 1px solid #222;
}
footer a {
  color: #5ca271;
  text-decoration: none;
}
footer a:hover {
  color: #7ed897;
}

@keyframes fadeIn {
  from {opacity: 0; transform: translateY(10px);}
  to {opacity: 1; transform: translateY(0);}
}