:root {
  --color-primary: #2C3E50;
  --color-secondary: #ECF0F1;
  --color-neutral: #7F8C8D;
  --color-accent-orange: #F39C12;
  --color-accent-green: #27AE60;
  --color-accent-light: #BDC3C7;
  --color-white: #FFFFFF;
  --color-black: #000000;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-xxl: 64px;
  --spacing-xxxl: 80px;
  --spacing-huge: 120px;
  --radius: 4px;
  --max-width: 1440px;
  --content-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--color-primary);
  background-color: var(--color-white);
  line-height: 1.6;
  font-size: 16px;
}

.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.container-full {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

h1 {
  font-size: 48px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 36px;
  margin-bottom: var(--spacing-lg);
}

h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

p {
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

/* Sections */
.section {
  padding: var(--spacing-huge) 0;
}

.section.alt-bg {
  background-color: var(--color-secondary);
}

.section-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
  margin-bottom: var(--spacing-huge);
}

.section-header.reverse {
  direction: rtl;
}

.section-header > * {
  direction: ltr;
}

.section-header-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius);
}

.section-header-content {
  padding: var(--spacing-xxl);
}

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

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

.logo {
  font-family: 'Montserrat', sans-serif;
  font-size: 24px;
  font-weight: 700;
  text-decoration: none;
  color: var(--color-white);
  text-transform: uppercase;
  letter-spacing: 2px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-xxl);
  align-items: center;
}

nav a {
  color: var(--color-white);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s ease-in-out;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}

nav a:hover,
nav a.active {
  border-bottom-color: var(--color-accent-orange);
}

/* Hero Section */
.hero {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: calc(var(--spacing-huge) * 2) var(--spacing-sm);
  text-align: center;
  margin-top: 70px;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: linear-gradient(135deg, rgba(44, 62, 80, 0.9), rgba(44, 62, 80, 0.8));
}

.hero-content h1 {
  color: var(--color-white);
  font-size: 54px;
  margin-bottom: var(--spacing-lg);
}

.hero-content p {
  color: var(--color-secondary);
  font-size: 20px;
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto;
}

/* Button */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--color-accent-orange);
  color: var(--color-white);
  text-decoration: none;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.2s ease-in-out;
  margin-top: var(--spacing-md);
}

.btn:hover {
  background-color: #e67e22;
  transform: translateY(-2px);
}

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

.btn.secondary:hover {
  background-color: #d5dbdb;
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xxl);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xxl);
}

/* Cards */
.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-accent-light);
  border-radius: var(--radius);
  padding: var(--spacing-lg);
  transition: all 0.2s ease-in-out;
}

.card:hover {
  border-color: var(--color-accent-orange);
  box-shadow: 0 4px 12px rgba(243, 156, 18, 0.1);
  transform: translateY(-4px);
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.card-text {
  color: var(--color-neutral);
  font-size: 14px;
  line-height: 1.6;
}

/* Blog Preview Cards */
.blog-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-accent-light);
  border-radius: var(--radius);
  transition: all 0.2s ease-in-out;
  cursor: pointer;
}

.blog-card:hover {
  border-color: var(--color-accent-orange);
  box-shadow: 0 4px 12px rgba(243, 156, 18, 0.1);
}

.blog-card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.blog-card-content {
  padding: var(--spacing-lg);
}

.blog-card-date {
  color: var(--color-accent-orange);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: var(--spacing-xs);
}

.blog-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.blog-card-excerpt {
  color: var(--color-neutral);
  font-size: 14px;
  line-height: 1.6;
}

/* Lists */
ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}

/* Quotes */
blockquote {
  border-left: 4px solid var(--color-accent-orange);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--color-secondary);
  margin: var(--spacing-lg) 0;
  font-style: italic;
  color: var(--color-primary);
}

/* Stats Bar */
.stats-bar {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-xl);
  margin: var(--spacing-huge) 0;
}

.stats-bar .grid-4 {
  text-align: center;
}

.stat-item {
  padding: var(--spacing-lg);
}

.stat-number {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-accent-orange);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 14px;
  color: var(--color-secondary);
  font-weight: 600;
}

/* Footer */
footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-xxl) 0;
  margin-top: var(--spacing-huge);
}

footer .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xxl);
  margin-bottom: var(--spacing-xxl);
}

.footer-section h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-section ul {
  list-style: none;
  margin: 0;
}

.footer-section a {
  color: var(--color-secondary);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.8;
  transition: color 0.2s ease-in-out;
}

.footer-section a:hover {
  color: var(--color-accent-orange);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: var(--color-accent-light);
  font-size: 12px;
}

/* Forms */
form {
  max-width: 600px;
  margin: var(--spacing-xxl) auto;
}

.form-group {
  margin-bottom: var(--spacing-lg);
  display: flex;
  flex-direction: column;
}

label {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-primary);
}

input, textarea, select {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-accent-light);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 14px;
  color: var(--color-primary);
  transition: border-color 0.2s ease-in-out;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-accent-orange);
  box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.1);
}

textarea {
  resize: vertical;
  min-height: 150px;
}

/* Breadcrumb */
.breadcrumb {
  background-color: var(--color-secondary);
  padding: var(--spacing-md) var(--spacing-sm);
  font-size: 12px;
  color: var(--color-neutral);
  margin-top: 70px;
}

.breadcrumb a {
  color: var(--color-accent-orange);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* Utilities */
.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.space-y-large {
  margin: var(--spacing-huge) 0;
}

.space-top {
  margin-top: var(--spacing-huge);
}

.space-bottom {
  margin-bottom: var(--spacing-huge);
}

.highlight {
  color: var(--color-accent-orange);
  font-weight: 700;
}

.green-highlight {
  color: var(--color-accent-green);
  font-weight: 700;
}

/* Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 28px;
  }

  nav ul {
    gap: var(--spacing-lg);
  }

  .section-header,
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .section-header-image {
    height: 300px;
  }

  .section-header-content {
    padding: var(--spacing-lg);
  }

  footer .container {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }

  .hero {
    min-height: 400px;
    padding: var(--spacing-xxl) var(--spacing-sm);
  }

  .hero-content h1 {
    font-size: 36px;
  }

  .blog-card-image {
    height: 200px;
  }

  .stats-bar .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 28px;
  }

  h2 {
    font-size: 22px;
  }

  h3 {
    font-size: 18px;
  }

  body {
    font-size: 14px;
  }

  nav ul {
    flex-direction: column;
    gap: var(--spacing-md);
    width: 100%;
  }

  .logo {
    font-size: 18px;
  }

  footer .container {
    grid-template-columns: 1fr;
  }

  .section {
    padding: var(--spacing-xl) 0;
  }

  .stats-bar .grid-4 {
    grid-template-columns: 1fr;
  }
}