/* CSS Variables */
:root {
  --primary-color: #0056b3;
  --secondary-color: #6c757d;
  --accent-color: #343a40;
  --light-color: #f8f9fa;
  --text-color: #212529;
  --link-color: #0056b3;
  --border-radius: 2rem;
  --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-color);
  background-color: var(--light-color);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
}

a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1em;
}

.header {
  background-color: var(--accent-color);
  color: var(--light-color);
  padding: 1rem 0;
}

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

.header nav {
  margin-left: auto;
}

.header nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

.header .logo {
  flex-shrink: 0;
}

.header .logo a {
  color: var(--light-color);
  font-weight: 500;
  font-size: 1.2rem;
}

.header .logo a:hover {
  color: var(--primary-color);
}

.header nav a {
  color: var(--light-color);
  font-weight: 500;
}

.header nav a:hover {
  color: var(--primary-color);
}

.hero {
  text-align: center;
  margin: 1rem auto;
  max-width: 1200px;
}

.hero-image {
  border-radius: var(--border-radius);
  border: 5px solid var(--secondary-color);
  box-shadow: var(--box-shadow);
  width: 100%;
  height: auto;
  margin: 0;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--light-color);
}

.hero p {
  font-size: 1.25rem;
  max-width: 800px;
  margin: 0 auto 1.5rem;
}

.cta-button {
  display: inline-block;
  background-color: var(--light-color);
  color: var(--primary-color);
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
}

.cta-button:hover {
  background-color: var(--secondary-color);
  color: var(--light-color);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.main-content {
}

.section {
  margin-bottom: 3rem;
}

.section p {
  margin-bottom: 2rem;
}

/* Global paragraph style */
p {
  margin-bottom: 1rem;
}

.section-title {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--accent-color);
  position: relative;
  padding-bottom: 0.5rem;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 3px;
  background-color: var(--primary-color);
}

.card {
  background-color: var(--light-color);
  border: 1px solid var(--secondary-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--box-shadow);
  transition: transform 0.3s ease;
}

.card:hover {
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.footer {
  background-color: var(--accent-color);
  color: var(--light-color);
  text-align: center;
  padding: 1.5rem 0;
  margin-top: auto;
}

.footer p {
  margin-bottom: 0.5rem;
}

@media (max-width: 768px) {
  .container {
    padding: 0 0.5em;
  }
  .header .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .header nav {
    margin-left: 0;
    width: 100%;
  }

  .header nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
  }

  .hero {
    margin: 0.5rem 0;
    max-width: 100%;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.3rem;
  }

  .section-title::after {
    width: 30px;
    height: 2px;
  }
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 1.5rem 0 1rem;
  color: var(--accent-color);
  line-height: 1.3;
}

h1 {
  font-size: 2.5em;
  border-bottom: 2px solid var(--primary-color);
  padding: 0.5em 0 0.3em;
  margin-top: 2rem;
}

h2 {
  font-size: 2em;
  border-bottom: 1px solid var(--primary-color);
  padding: 0.5em 0 0.3em;
  margin-top: 1.75rem;
}

h3 {
  font-size: 1.75em;
  margin-top: 1.5rem;
}

h4 {
  font-size: 1.5em;
  margin-top: 1.25rem;
}

h5 {
  font-size: 1.25em;
  margin-top: 1rem;
}

h6 {
  font-size: 1em;
  color: var(--secondary-color);
  margin-top: 0.75rem;
}

/* Text Formatting */
strong,
b {
  font-weight: 700;
}

em,
i {
  font-style: italic;
}

del,
s {
  text-decoration: line-through;
  color: var(--secondary-color);
}

/* Lists */
ul,
ol {
  margin: 1.5em 0;
  padding-left: 1.5em;
}

ul {
  list-style-type: disc;
}

ol {
  list-style-type: decimal;
}

ul ul,
ul ol,
ol ul,
ol ol {
  margin-top: 0.5em;
  margin-bottom: 0.5em;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5em 0;
  border-radius: var(--border-radius);
}

/* Code */
code {
  background-color: #f4f4f4;
  border: 1px solid #ddd;
  border-radius: 3px;
  padding: 0.2em 0.4em;
  font-family: "Courier New", Courier, monospace;
  font-size: 0.9em;
}

pre {
  background-color: #f4f4f4;
  border: 1px solid #ddd;
  border-radius: var(--border-radius);
  padding: 1em;
  overflow-x: auto;
  margin: 1.5em 0;
}

pre code {
  border: none;
  padding: 0;
  font-size: 0.9em;
  display: block;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9em;
}

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

table th {
  background-color: var(--accent-color);
  color: var(--light-color);
}

table tr:nth-child(even) {
  background-color: #f9f9f9;
}

table tr:hover {
  background-color: #f1f1f1;
}

/* Blockquotes */
blockquote {
  margin: 1.5em 0;
  padding: 1em 1.5em;
  border-left: 5px solid var(--primary-color);
  background-color: #f9f9f9;
  color: var(--text-color);
  font-style: italic;
}

/* Horizontal Rules */
hr {
  border: 0;
  border-top: 1px solid #ddd;
  margin: 2em 0;
}

/* Task Lists */
.task-list {
  list-style: none;
  padding-left: 0;
}

.task-list li {
  margin: 0.5em 0;
  display: flex;
  align-items: center;
}

.task-list input[type="checkbox"] {
  margin-right: 0.5em;
}

/* Footnotes */
.footnote-ref {
  vertical-align: super;
  font-size: 0.8em;
  text-decoration: none;
}

.footnote {
  font-size: 0.9em;
  margin: 1.5em 0;
  padding: 1em;
  background-color: #f9f9f9;
  border-left: 3px solid var(--primary-color);
}

/* Emoji */
emoji {
  display: inline-block;
  vertical-align: middle;
}

/* Mathematical Expressions */
.math {
  display: block;
  margin: 1.5em 0;
  font-size: 1.2em;
  text-align: center;
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.text-center {
  text-align: center;
  margin-top: 2rem;
}