/* Reset & Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f0f4f8;
  color: #333;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body.dark {
  background-color: #121212;
  color: #f5f5f5;
}

main {
  max-width: 900px;
  margin: 2rem auto;
  padding: 2rem;
  text-align: center;
  animation: fadeIn 0.6s ease-in-out;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Theme toggle */
#themeToggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: linear-gradient(to right, #4caf50, #2196f3);
  color: white;
  border: none;
  padding: 0.7rem 1.2rem;
  border-radius: 10px;
  cursor: pointer;
  font-weight: bold;
  z-index: 999;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  transition: all 0.3s ease;
}

#themeToggle:hover {
  transform: scale(1.05);
}

body.dark #themeToggle {
  background: linear-gradient(to right, #666, #333);
}

/* Headings */
h1, h2 {
  margin-bottom: 1rem;
  font-weight: 700;
}

h1 i, h2 i {
  margin-right: 0.5rem;
  color: #2196f3;
}

/* Container */
#pricing-container {
  background: white;
  border-radius: 20px;
  padding: 2rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  margin-top: 2rem;
}

body.dark #pricing-container {
  background: #1e1e1e;
  box-shadow: 0 10px 25px rgba(255,255,255,0.05);
}

/* Section Layout */
section {
  margin: 2rem 0;
  text-align: left;
}

section ul {
  list-style: none;
  padding: 0;
  margin-top: 1rem;
}

section li {
  padding: 0.75rem 1.25rem;
  margin-bottom: 0.5rem;
  background: #f0f0f0;
  border-radius: 10px;
  font-size: 1rem;
  transition: background 0.3s;
}

body.dark section li {
  background: #2a2a2a;
}

/* Inputs */
input[type="radio"],
input[type="checkbox"] {
  transform: scale(1.2);
  margin-right: 0.5rem;
}

label {
  display: block;
  padding: 0.75rem 1rem;
  background: #e9eef4;
  margin: 0.5rem 0;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
}

label:hover {
  background: #d3e1f0;
}

body.dark label {
  background: #2a2a2a;
}

body.dark label:hover {
  background: #333;
}

/* Quantity Field */
.qty-group {
  margin-top: 1rem;
  font-size: 1rem;
}

.qty-group input {
  width: 60px;
  padding: 0.4rem;
  font-size: 1rem;
  margin-left: 0.5rem;
  border-radius: 6px;
  border: 1px solid #ccc;
}

body.dark .qty-group input {
  background: #333;
  color: #fff;
  border-color: #555;
}

/* Pricing Summary */
#pricing-summary {
  margin-top: 3rem;
  padding: 2rem;
  background: #f9fafb;
  border-radius: 20px;
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.08);
}

body.dark #pricing-summary {
  background: #222;
}

#total {
  display: block;
  font-size: 2rem;
  font-weight: bold;
  color: #4caf50;
  margin-bottom: 1.5rem;
}

#breakdown li {
  font-size: 1rem;
  margin: 0.25rem 0;
  padding-left: 0.5rem;
}

/* Responsive */
@media (max-width: 600px) {
  main {
    padding: 1rem;
  }

  #themeToggle {
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
  }
}