:root {
  --primary-color: #6a0dad; /* Vibrant Purple */
  --bg-color: #ffffff;
  --surface-color: #f8f7fa;
  --text-color: #1c1c1e; /* Almost Black */
  --text-muted-color: #555;
  --border-color: #e5e5e5;
  --heading-font: 'Poppins', sans-serif;
  --body-font: 'Lato', sans-serif;
  --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.07);
  --border-radius: 6px;
}

/* Global Styles & Resets */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--body-font);
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-color);
  background-color: var(--bg-color);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: 92%;
  max-width: 1200px;
  margin: 0 auto;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--heading-font);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.75em;
  color: var(--text-color);
}

h1 { font-size: 3.2rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.6rem; }

p {
  margin-bottom: 1.5rem;
  color: var(--text-muted-color);
}

a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

a:hover, a:focus {
  color: #4b0979;
  text-decoration: underline;
}

ul {
  list-style-position: outside;
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: var(--text-muted-color);
}

ul li {
  margin-bottom: 0.5rem;
  padding-left: 0.5rem;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: #ffffff;
  padding: 14px 32px;
  border-radius: var(--border-radius);
  border: 2px solid var(--primary-color);
  text-transform: uppercase;
  font-weight: 700;
  font-family: var(--heading-font);
  font-size: 0.85rem;
  letter-spacing: 1.5px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn:hover, .btn:focus {
  background-color: #4b0979;
  border-color: #4b0979;
  color: #ffffff;
  text-decoration: none;
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(106, 13, 173, 0.4);
}

/* Header & Navigation */
.site-header {
  background-color: var(--bg-color);
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.site-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.site-title a {
  color: var(--text-color);
  text-decoration: none;
}

.site-title a:hover {
  text-decoration: none;
  color: var(--primary-color);
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 2.5rem;
  margin: 0;
  padding: 0;
}

.main-nav a {
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-muted-color);
  padding: 8px 0;
  position: relative;
  text-decoration: none;
}

.main-nav a:hover, .main-nav a.active {
  color: var(--primary-color);
  text-decoration: none;
}

/* Main Content Area */
.main-content {
  flex: 1;
  padding: 4rem 0;
}

.main-layout {
  display: grid;
  gap: 3.5rem;
}

/* Page Header */
.page-header {
  text-align: center;
  margin-bottom: 4rem;
}

.page-header h1 {
  margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.25rem;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-color);
}

/* Articles Grid (Homepage) */
.articles-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

.article-card {
  background-color: var(--bg-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}

.article-card::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 4px;
    background-color: var(--primary-color);
    transition: width 0.4s ease;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--box-shadow);
}

.article-card:hover::before {
    width: 100%;
}

.article-card-content {
  padding: 2rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-card h2 {
  font-size: 1.5rem;
  margin-top: 0;
}

.article-card p {
  flex-grow: 1;
  margin-bottom: 2rem;
}

/* Single Article Page */
.article-full .article-header {
  margin-bottom: 2.5rem;
}

.article-full .article-meta {
  font-size: 0.9rem;
  color: var(--text-muted-color);
  margin-top: -1rem;
  display: block;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.article-full .article-content {
  font-size: 1.15rem;
  max-width: 780px; /* Optimal reading width */
}

.article-full .article-content h2 {
  margin-top: 3rem;
  padding-bottom: 0.5rem;
  font-size: 1.8rem;
}
.article-full .article-content h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-top: 2.5rem;
}

.article-full .cta-section {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    margin: 3rem 0;
    border-radius: var(--border-radius);
}

.article-full .cta-section h3 {
    margin-top: 0;
}

/* Sidebar */
.sidebar-widget {
  background-color: var(--surface-color);
  padding: 2rem;
  border-radius: var(--border-radius);
  margin-bottom: 2rem;
  border: 1px solid var(--border-color);
}

.sidebar-widget h3 {
  font-size: 1.4rem;
  padding-bottom: 0.75rem;
  margin-top: 0;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--primary-color);
  display: inline-block;
}

.sidebar-widget ul {
  list-style: none;
  padding: 0;
}

.sidebar-widget ul li {
  margin-bottom: 1rem;
  padding-left: 0;
}

.sidebar-widget ul a {
  font-weight: 700;
  text-decoration: none;
}
.sidebar-widget ul a:hover {
    text-decoration: underline;
}

.sidebar-promo {
    line-height: 1.6;
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}

/* Footer */
.site-footer {
  background-color: var(--text-color);
  color: #a0a0a0;
  padding: 3rem 0;
  margin-top: auto;
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.footer-nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.footer-nav a {
  color: #f8f7fa;
  text-decoration: none;
  font-weight: 500;
}

.footer-nav a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.copyright {
  font-size: 0.9rem;
}

/* Responsive Styles */
@media (min-width: 768px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-footer .container {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (min-width: 992px) {
  .main-layout {
    grid-template-columns: 2.5fr 1fr;
  }

  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .home-grid .articles-grid {
      grid-template-columns: repeat(3, 1fr);
  }

  .home-grid {
     grid-template-columns: 2.5fr 1fr;
  }
}