body {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: #f1f5f9;
  font-family: "Inter", Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  padding: 40px;
}


.container {
  background: rgba(30, 41, 59, 0.85);
  padding: 30px 35px;
  border-radius: 20px;
  max-width: 500px;
  width: 100%;
  box-shadow: 0 8px 30px rgba(0,0,0,0.7);
  backdrop-filter: blur(12px);
  transition: transform 0.2s ease;
}
.container:hover {
  transform: translateY(-3px);
}


h1 {
  text-align: center;
  margin-bottom: 30px;
  color: #38bdf8;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 1px;
}


.option-card {
  background: #1e293b;
  padding: 14px 18px;
  border-radius: 14px;
  margin-bottom: 14px;
  border: 1px solid rgba(148,163,184,0.15);
  transition: background 0.2s ease, transform 0.2s ease;
}
.option-card:hover {
  background: #334155;
  transform: translateX(3px);
}
.option-card label {
  font-size: 15px;
  font-weight: 600;
}


select {
  margin-top: 6px;
  display: block;
  width: 100%;
  padding: 8px 10px;
  border-radius: 10px;
  border: none;
  font-size: 14px;
  background: #0f172a;
  color: #f1f5f9;
  outline: none;
}
select:focus {
  box-shadow: 0 0 0 2px #38bdf8;
}

input[type="checkbox"] {
  accent-color: #38bdf8;
  margin-right: 8px;
  transform: scale(1.2);
}


button {
  display: inline-block;
  border: none;
  padding: 12px 18px;
  margin-top: 12px;
  border-radius: 12px;
  cursor: pointer;
  width: 100%;
  font-size: 16px;
  font-weight: bold;
  transition: background 0.25s ease, transform 0.2s ease;
}

button:hover {
  transform: translateY(-2px);
}

button:not(.reset-btn) {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: white;
}
button:not(.reset-btn):hover {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.reset-btn {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  color: #fff;
}
.reset-btn:hover {
  background: linear-gradient(135deg, #b91c1c, #7f1d1d);
}


#totalPrice {
  margin-top: 20px;
  font-size: 22px;
  color: #22c55e;
  font-weight: 800;
  text-align: center;
  padding: 12px;
  background: rgba(34,197,94,0.1);
  border-radius: 10px;
}


#confirmBox {
  margin-top: 25px;
  text-align: center;
  padding: 15px;
  border-radius: 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(148,163,184,0.15);
}
#confirmBox p {
  margin-bottom: 12px;
  font-size: 15px;
  color: #facc15;
}

#confirmBox button {
  margin: 6px;
  width: auto;
  padding: 10px 18px;
}