/* 
* MilesToFeet.com - Modern Conversion Tool
* Main Stylesheet
*/

:root {
  --primary-color: #3498db;
  --secondary-color: #2980b9;
  --accent-color: #e74c3c;
  --light-grey: #f8f9fa;
  --dark-grey: #343a40;
  --text-color: #333;
  --light-text: #6c757d;
  --success-color: #28a745;
  --border-radius: 0.5rem;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', 'Segoe UI', Arial, sans-serif;
  color: var(--text-color);
  background: #f5f7fa;
  line-height: 1.6;
  font-size: 16px;
}

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

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

img {
  max-width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin: 1.5rem 0 1rem;
  color: var(--dark-grey);
}

h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 1.8rem;
  margin-top: 2rem;
}

h3 {
  font-size: 1.5rem;
  color: var(--secondary-color);
}

h4 {
  font-size: 1.2rem;
  color: var(--primary-color);
}

p {
  margin-bottom: 1.5rem;
  color: var(--text-color);
  font-size: 1rem;
  line-height: 1.7;
}

/* Layout */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
header {
  background-color: white;
  box-shadow: var(--box-shadow);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 40px;
  margin-right: 1rem;
}

.logo h1 {
  font-size: 1.5rem;
  margin: 0;
  color: var(--primary-color);
}

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

nav ul li {
  margin-left: 1.5rem;
}

nav ul li a {
  font-weight: 500;
  color: var(--dark-grey);
  position: relative;
}

nav ul li a:hover {
  color: var(--primary-color);
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition);
}

nav ul li a:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  font-size: 1.5rem;
  background: none;
  border: none;
  color: var(--dark-grey);
  cursor: pointer;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #3498db, #1abc9c);
  color: white;
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20"><circle cx="2" cy="2" r="1" fill="rgba(255, 255, 255, 0.2)"/></svg>') repeat;
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: white;
}

.hero p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.95);
}

.cta-button {
  display: inline-block;
  background-color: white;
  color: var(--primary-color);
  font-weight: 600;
  padding: 0.8rem 2rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
  text-decoration: none;
}

/* Converter Section */
.converter-section {
  padding: 3rem 0;
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  margin: -2rem auto 3rem;
  position: relative;
  z-index: 10;
  max-width: 900px;
}

.converter-section h2 {
  text-align: center;
  margin-bottom: 2rem;
}

.converter-form {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 1rem;
}

.input-group {
  display: flex;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.input-group input {
  flex: 1;
  padding: 1rem;
  border: 1px solid #e1e5ea;
  border-right: none;
  border-radius: var(--border-radius) 0 0 var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
}

.input-group input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.input-group select {
  width: 40%;
  padding: 1rem;
  border: 1px solid #e1e5ea;
  background-color: white;
  font-size: 1rem;
  transition: var(--transition);
  cursor: pointer;
}

.input-group select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.convert-btn {
  width: 100%;
  padding: 1rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  margin-bottom: 1.5rem;
}

.convert-btn:hover {
  background-color: var(--secondary-color);
}

.result {
  padding: 1.5rem;
  margin-top: 1.5rem;
  background-color: var(--light-grey);
  border-radius: var(--border-radius);
  text-align: center;
  transition: var(--transition);
  display: none;
}

.result.visible {
  display: block;
  animation: fadeIn 0.5s;
}

.result-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 0.5rem;
}

.result-formula {
  margin-top: 1rem;
  padding: 1rem;
  background-color: rgba(52, 152, 219, 0.1);
  border-radius: var(--border-radius);
  font-size: 0.9rem;
  color: var(--light-text);
}

.result-formula code {
  background-color: white;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: monospace;
}

/* Recent Conversions */
.recent-conversions {
  margin: 3rem 0;
}

.recent-conversions h3 {
  text-align: center;
  margin-bottom: 2rem;
}

.tabs {
  overflow: hidden;
  background-color: #f8f9fa;
  border-radius: var(--border-radius);
}

.tab-links {
  display: flex;
  background-color: var(--primary-color);
  overflow: hidden;
}

.tab-link {
  padding: 1rem;
  background-color: transparent;
  color: white;
  border: none;
  cursor: pointer;
  flex: 1;
  font-weight: 600;
  transition: var(--transition);
  text-align: center;
}

.tab-link.active {
  background-color: white;
  color: var(--primary-color);
}

.tab-content {
  display: none;
  padding: 1.5rem;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.5s;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
}

table th,
table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid #dee2e6;
}

table th {
  font-weight: 600;
  background-color: rgba(0, 0, 0, 0.03);
}

.conversion-link {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.conversion-link:hover {
  text-decoration: underline;
}

/* Info Sections */
.info-section {
  padding: 4rem 0;
  background-color: white;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.info-card {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 2rem;
  transition: var(--transition);
}

.info-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.info-card h3 {
  margin-top: 0;
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.info-card h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background-color: var(--primary-color);
}

.formula-box {
  background-color: #f8f9fa;
  padding: 1rem;
  border-radius: var(--border-radius);
  margin: 1.5rem 0;
  font-family: monospace;
  font-size: 1.1rem;
  text-align: center;
}

.example-box {
  background-color: rgba(52, 152, 219, 0.1);
  padding: 1rem;
  border-radius: var(--border-radius);
  margin: 1.5rem 0;
}

.example-box p {
  margin: 0.5rem 0;
}

.example-box strong {
  color: var(--secondary-color);
}

/* Tables */
.conversion-tables {
  margin: 3rem 0;
}

.table-responsive {
  overflow-x: auto;
}

table caption {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--secondary-color);
}

/* Additional Information */
.additional-info {
  background-color: var(--light-grey);
  padding: 4rem 0;
}

.fact-box {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.fact-box h4 {
  margin-top: 0;
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

.fact-box p:last-child {
  margin-bottom: 0;
}

.comparison-data {
  margin-top: 1rem;
}

.comparison-data li {
  margin-bottom: 0.5rem;
}

/* Detail Pages Specific */
.conversion-detail {
  background-color: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: 2rem;
  margin: 2rem 0;
}

.detail-result {
  text-align: center;
  margin: 2rem 0;
  padding: 2rem;
  background-color: rgba(52, 152, 219, 0.1);
  border-radius: var(--border-radius);
}

.detail-result h2 {
  margin-top: 0;
  color: var(--secondary-color);
}

.result-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 1rem 0;
}

.solution-steps {
  text-align: left;
  margin: 2rem 0;
}

.solution-steps h3 {
  margin-top: 0;
}

.calculation {
  background-color: #f8f9fa;
  padding: 1rem;
  border-radius: var(--border-radius);
  font-family: monospace;
  margin: 1rem 0;
  text-align: center;
  font-size: 1.2rem;
}

/* Similar Conversions */
.similar-conversions {
  margin: 2rem 0;
}

.similar-conversions ul {
  list-style: none;
  padding: 0;
}

.similar-conversions li {
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  background-color: var(--dark-grey);
  color: white;
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-column h4 {
  color: white;
  margin-top: 0;
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.footer-column ul {
  list-style: none;
  padding: 0;
}

.footer-column ul li {
  margin-bottom: 0.5rem;
}

.footer-column ul li a {
  color: rgba(255, 255, 255, 0.8);
}

.footer-column ul li a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

.footer-bottom p {
  margin-bottom: 1rem;
  color: rgba(255, 255, 255, 0.6);
}

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

/* Responsive Design */
@media (max-width: 768px) {
  h1 {
    font-size: 1.8rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .hero {
    padding: 3rem 0;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  }
  
  nav.active {
    display: block;
  }
  
  nav ul {
    flex-direction: column;
    padding: 1rem;
  }
  
  nav ul li {
    margin: 0.5rem 0;
  }
  
  .input-group {
    flex-direction: column;
  }
  
  .input-group input, 
  .input-group select {
    width: 100%;
    border-radius: var(--border-radius);
    border: 1px solid #e1e5ea;
    margin-bottom: 0.5rem;
  }
  
  .input-group input {
    border-right: 1px solid #e1e5ea;
    border-radius: var(--border-radius);
  }
  
  .grid-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .result-value {
    font-size: 1.5rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
}