/* Base Styles and Variables */
:root {
  --primary-color: #3b5998;
  --secondary-color: #1e3c72;
  --accent-color: #FFCC00;
  --dark-accent: #A0522D;
  --text-color: #333333;
  --light-text: #ffffff;
  --background-light: #f9f9f9;
  --background-dark: #e9e9e9;
  --max-width: 1200px;
  --border-radius: 6px;
  --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease-in-out;
}

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

html {
  scroll-behavior: smooth;
  font-size: 62.5%; /* 1rem = 10px */
}

body {
  font-family: 'Roboto', 'Segoe UI', sans-serif;
  font-size: 1.6rem;
  line-height: 1.7;
  color: var(--text-color);
  background-color: var(--background-light);
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

img, svg {
  max-width: 100%;
  height: auto;
}

.container {
  width: 90%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 8rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title h2 {
  font-size: 3.6rem;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
  font-weight: 700;
}

.section-title p {
  max-width: 70rem;
  margin: 0 auto;
  color: var(--text-color);
  opacity: 0.8;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1.2rem 2.4rem;
  background-color: var(--primary-color);
  color: var(--light-text);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.4rem;
}

.btn:hover {
  background-color: var(--secondary-color);
  color: var(--light-text);
  transform: translateY(-3px);
  box-shadow: var(--box-shadow);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

.btn-outline:hover {
  background-color: var(--primary-color);
  color: var(--light-text);
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--background-light);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
}

.logo {
  display: flex;
  align-items: center;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--primary-color);
}

.logo svg {
  margin-right: 1rem;
}

.nav-menu {
  display: flex;
  align-items: center;
}

.nav-menu li {
  margin-left: 3rem;
}

.nav-menu a {
  font-size: 1.6rem;
  font-weight: 500;
  position: relative;
}

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

.nav-menu a:hover::after {
  width: 100%;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 2.4rem;
  color: var(--primary-color);
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 60rem;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--light-text);
  text-align: center;
  margin-top: 6rem;
}

.hero-content {
  padding: 2rem;
}

.hero .tagline {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 5rem;
  font-size: 1.4rem;
  margin-bottom: 2rem;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.hero h1 {
  font-size: 5.6rem;
  margin-bottom: 2rem;
  font-weight: 700;
  line-height: 1.2;
}

.hero p {
  font-size: 2rem;
  max-width: 60rem;
  margin: 0 auto 3rem;
  opacity: 0.9;
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(30rem, 1fr));
  gap: 3rem;
}

.feature-card {
  background-color: var(--background-light);
  border-radius: var(--border-radius);
  padding: 3rem;
  box-shadow: var(--box-shadow);
  text-align: center;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-icon {
  margin-bottom: 2rem;
}

.feature-card h3 {
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.feature-card p {
  color: var(--text-color);
  font-size: 1.6rem;
}

/* Tools Section */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(28rem, 1fr));
  gap: 3rem;
}

.tool-card {
  background-color: var(--light-text);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.tool-card:hover {
  transform: translateY(-5px);
}

.tool-content {
  padding: 2rem;
}

.tool-content h3 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.tool-content p {
  margin-bottom: 2rem;
  color: var(--text-color);
  font-size: 1.5rem;
}

.tool-icon {
  width: 100%;
  height: 20rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--background-dark);
}

/* News Section */
.news-section {
  background-color: var(--background-dark);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(28rem, 1fr));
  gap: 3rem;
}

.news-card {
  background-color: var(--light-text);
  border-radius: var(--border-radius);
  overflow: hidden;
  height: 100%;
  transition: var(--transition);
  box-shadow: var(--box-shadow);
}

.news-card:hover {
  transform: translateY(-5px);
}

.news-content {
  padding: 2rem;
}

.news-content h3 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.news-content p {
  margin-bottom: 1.5rem;
  color: var(--text-color);
  font-size: 1.5rem;
}

.news-content a {
  display: inline-block;
  font-weight: 600;
  font-size: 1.4rem;
  color: var(--accent-color);
  text-decoration: underline;
}

.news-content a:hover {
  color: var(--dark-accent);
}

/* Newsletter Section */
.newsletter-section {
  background-color: var(--primary-color);
  color: var(--light-text);
  text-align: center;
  padding: 6rem 0;
}

.newsletter-section h2 {
  font-size: 3.6rem;
  margin-bottom: 2rem;
}

.newsletter-section p {
  margin-bottom: 3rem;
  max-width: 70rem;
  margin-left: auto;
  margin-right: auto;
  opacity: 0.9;
}

.newsletter-form {
  display: flex;
  max-width: 60rem;
  margin: 0 auto;
}

.newsletter-form input {
  flex: 1;
  padding: 1.5rem 2rem;
  border: none;
  border-radius: var(--border-radius) 0 0 var(--border-radius);
  font-size: 1.6rem;
  outline: none;
}

.newsletter-form button {
  background-color: var(--accent-color);
  border: none;
  color: var(--primary-color);
  padding: 0 3rem;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 700;
}

.newsletter-form button:hover {
  background-color: var(--dark-accent);
  color: var(--light-text);
}

/* Footer */
footer {
  background-color: var(--secondary-color);
  color: var(--light-text);
  padding: 5rem 0 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(25rem, 1fr));
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-about p {
  margin: 2rem 0;
  opacity: 0.8;
}

.footer-logo {
  display: flex;
  align-items: center;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--light-text);
}

.footer-logo svg {
  margin-right: 1rem;
}

.social-links {
  display: flex;
  gap: 1.5rem;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 4rem;
  height: 4rem;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--light-text);
  border-radius: 50%;
  transition: var(--transition);
}

.social-links a:hover {
  background-color: var(--accent-color);
  color: var(--primary-color);
}

.footer-links h4,
.footer-contact h4 {
  font-size: 1.8rem;
  margin-bottom: 2rem;
  position: relative;
  padding-bottom: 1rem;
}

.footer-links h4::after,
.footer-contact h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 5rem;
  height: 2px;
  background-color: var(--accent-color);
}

.footer-links ul li {
  margin-bottom: 1rem;
}

.footer-links ul li a {
  color: var(--light-text);
  opacity: 0.8;
  transition: var(--transition);
}

.footer-links ul li a:hover {
  opacity: 1;
  padding-left: 0.5rem;
}

.footer-contact p {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  opacity: 0.8;
}

.copyright {
  text-align: center;
  padding: 2rem 0;
  background-color: rgba(0, 0, 0, 0.1);
}

/* Mobile Responsive Design */
@media screen and (max-width: 1024px) {
  html {
    font-size: 56.25%; /* 1rem = 9px */
  }
  
  .hero h1 {
    font-size: 4.8rem;
  }
}

@media screen and (max-width: 768px) {
  html {
    font-size: 50%; /* 1rem = 8px */
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 7rem;
    left: -100%;
    width: 100%;
    padding: 3rem 0;
    background-color: var(--background-light);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    flex-direction: column;
    transition: var(--transition);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-menu li {
    margin: 1rem 0;
  }
  
  .hero {
    min-height: 50rem;
    padding-top: 8rem;
    height: auto;
  }
  
  .hero h1 {
    font-size: 3.8rem;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .newsletter-form input {
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
  }
  
  .newsletter-form button {
    border-radius: var(--border-radius);
    width: 100%;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-logo {
    justify-content: center;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .footer-links h4::after,
  .footer-contact h4::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .footer-contact p {
    justify-content: center;
  }
}

@media screen and (max-width: 480px) {
  .features-grid,
  .tools-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }
  
  .section {
    padding: 5rem 0;
  }
  
  .section-title h2 {
    font-size: 3rem;
  }
}