/* Reset default styles for consistency */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Root variables for theming */
:root {
  --primary-color: #1e40af; /* Deep blue for cybersecurity theme */
  --secondary-color: #06b6d4; /* Cyan for accents */
  --bg-color: #f3f4f6; /* Light gray for light mode */
  --bg-dark: #1f2937; /* Dark gray for dark mode */
  --text-color: #111827; /* Dark text for light mode */
  --text-dark: #e5e7eb; /* Light text for dark mode */
  --card-bg: #ffffff; /* White for cards in light mode */
  --card-bg-dark: #374151; /* Darker gray for cards in dark mode */
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --accent-glow: 0 0 10px rgba(6, 182, 212, 0.5);
}

/* Dark mode styles */
.dark {
  --bg-color: var(--bg-dark);
  --text-color: var(--text-dark);
  --card-bg: var(--card-bg-dark);
}

/* Body styling */
body {
  font-family: 'Inter', system-ui, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  scroll-behavior: smooth;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header and Navigation */
header {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

nav {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
}

nav h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
}

nav ul {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

nav ul li a:hover {
  color: var(--secondary-color);
  text-shadow: var(--accent-glow);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: white;
  font-size: 1.2rem;
  padding: 0.5rem;
}

/* Sections */
section {
  padding: 4rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
}

section h2 {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2rem;
  color: var(--primary-color);
}

/* Home Section */
#home {
  background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('cyber-bg.jpg');
  background-size: cover;
  background-position: center;
  color: white;
  text-align: center;
  padding: 6rem 2rem;
}

#home h2 {
  font-size: 3rem;
  color: white;
  text-shadow: var(--accent-glow);
}

/* About Section */
#about p {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
}

/* Blog Section */
.blog-post {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 0.5rem;
  margin: 1rem 0;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
}

.blog-post:hover {
  transform: translateY(-5px);
}

/* Skills and Projects Grid */
.skills-grid, .projects-grid, .tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.skill-card, .project-card, .tools-grid > div {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-card:hover, .project-card:hover, .tools-grid > div:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.skill-card h3, .project-card h3, .tools-grid h3 {
  color: var(--primary-color);
}

/* Contact Form */
#contact form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

#contact input, #contact textarea {
  padding: 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: 0.375rem;
  background: var(--card-bg);
  color: var(--text-color);
}

#contact button {
  background: var(--primary-color);
  color: white;
  padding: 0.75rem;
  border: none;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: background 0.3s ease;
}

#contact button:hover {
  background: var(--secondary-color);
}

/* Footer */
footer {
  background: var(--primary-color);
  color: white;
  padding: 2rem;
  text-align: center;
}

.footer-content {
  max-width: 1280px;
  margin: 0 auto;
}

.footer-nav a {
  color: white;
  text-decoration: none;
  margin: 0 0.5rem;
}

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

.footer-social {
  margin-top: 1rem;
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.footer-social img {
  transition: transform 0.3s ease;
}

.footer-social img:hover {
  transform: scale(1.2);
}

/* Responsive Design */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: 1rem;
  }

  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }

  section {
    padding: 2rem 1rem;
  }

  #home h2 {
    font-size: 2rem;
  }
}