:root {
  --primary-color: #00baa4; /* Cloudflare-ish or modern teal */
  --secondary-color: #2c3e50;
  --accent-color: #e74c3c;
  --bg-color: #f8f9fa;
  --text-color: #333;
  --card-bg: #ffffff;
  --border-radius: 8px;
  --box-shadow: 0 4px 6px rgba(0,0,0,0.1);
  --font-main: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  background-color: var(--secondary-color);
  color: white;
  padding: 1rem 0;
}

.container {
  width: 90%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 15px;
}

.nav-flex {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo a {
  color: white;
  text-decoration: none;
  font-size: 1.5rem;
  font-weight: bold;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 20px;
}

nav a {
  color: #ecf0f1;
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  text-decoration: underline;
  color: var(--primary-color);
}

main {
  padding: 2rem 0;
  min-height: 60vh;
}

h1, h2, h3 {
  color: var(--secondary-color);
}

.card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: white;
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s;
}

.btn:hover {
  background-color: #008f7d;
}

.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
}

.result-box {
  background-color: #e8f8f5;
  border-left: 5px solid var(--primary-color);
  padding: 1.5rem;
  margin-top: 2rem;
}

.result-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.result-total {
  font-size: 1.5rem;
  font-weight: bold;
  border-top: 2px solid #ccc;
  padding-top: 1rem;
  margin-top: 1rem;
}

.disclaimer {
  font-size: 0.85rem;
  color: #666;
  margin-top: 2rem;
  padding: 1rem;
  background: #fff3cd;
  border: 1px solid #ffeeba;
  border-radius: 4px;
}

.breadcrumbs {
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.breadcrumbs a {
  color: var(--primary-color);
  text-decoration: none;
}

.faq-section details {
  background: white;
  margin-bottom: 1rem;
  padding: 1rem;
  border-radius: var(--border-radius);
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.faq-section summary {
  cursor: pointer;
  font-weight: bold;
  color: var(--secondary-color);
}

footer {
  background-color: var(--secondary-color);
  color: white;
  text-align: center;
  padding: 2rem 0;
  margin-top: auto;
}

footer a {
  color: var(--primary-color);
}

/* Tooltip for Rate emphasis */
.rate-badge {
  background: var(--accent-color);
  color: white;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  margin-left: 0.5rem;
  vertical-align: middle;
}

@media (max-width: 600px) {
  .nav-flex {
    flex-direction: column;
    gap: 1rem;
  }
  
  nav ul {
    flex-direction: column;
    align-items: center;
  }
}