:root {
  /* Professional Color Palette */
  --primary-color: #ffffff;
  --secondary-color: #2c3e50;
  --accent-color: #3498db;
  --text-color: #333333;
  --card-bg: #f4f6f7;
  --header-bg: rgba(255, 255, 255, 0.9);
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

body.light-theme {
  /* Dark Theme Colors */
  --primary-color: #17202a;
  --secondary-color: #eaf2f8;
  --accent-color: #5dade2;
  --text-color: #d5dbdb;
  --card-bg: #212f3d;
  --header-bg: rgba(25, 32, 42, 0.9);
}

/* Base Styles */
body {
  font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  margin: 0;
  background-color: var(--primary-color);
  color: var(--text-color);
  transition: background-color 0.3s ease, color 0.3s ease;
  line-height: 1.6;
}

/* Layout Wrappers */
section {
  padding: 4rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--header-bg);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  box-sizing: border-box;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-color);
  text-decoration: none;
}

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

nav a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: color 0.3s ease;
}

nav a:hover {
  color: var(--accent-color);
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.2rem;
  cursor: pointer;
  transition: color 0.3s ease;
}
.theme-toggle:hover {
  color: var(--accent-color);
}

/* Hero Section */
.hero {
  min-height: 85vh;
  justify-content: center;
  text-align: center;
  background-color: var(--card-bg);
}

.hero-text h1 {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.hero-text .highlight {
  color: var(--accent-color);
}

.hero-text p {
  font-size: 1.2rem;
  max-width: 600px;
  margin: 1rem auto 2rem;
  color: var(--text-color);
  opacity: 0.8;
}

/* Buttons */
.btn {
  background-color: var(--accent-color);
  color: #fff;
  padding: 0.8rem 1.8rem;
  border: 2px solid var(--accent-color);
  border-radius: 5px;
  margin: 0.5rem;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn:hover {
  background-color: transparent;
  color: var(--accent-color);
}

.btn-outline {
  background: transparent;
  color: var(--accent-color);
}

.btn-outline:hover {
  background-color: var(--accent-color);
  color: #fff;
}

/* General Section Styling */
.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2.5rem;
  color: var(--text-color);
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--accent-color);
  border-radius: 2px;
}

/* About Section */
.about-container {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 900px;
}

.about-image img {
  width: 280px;
  height: 280px;
  object-fit: cover;
  border-radius: 50%;
  border: 5px solid var(--accent-color);
  box-shadow: var(--shadow);
}

.about-text {
  max-width: 500px;
}

/* Skills & Projects */
.skills-grid, .projects-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}

.skill-card, .project-card {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
  box-shadow: var(--shadow);
  width: 220px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-card:hover, .project-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.15);
}

.skill-card i {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--accent-color);
}

.project-image img {
  width: 100%;
  border-radius: 5px;
  margin-bottom: 1rem;
}

/* Contact Section */
.contact-container {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
  justify-content: center;
  width: 100%;
  max-width: 900px;
}

.contact-info, .contact-form {
  flex: 1;
  min-width: 300px;
  max-width: 500px;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-control {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #ccc;
  border-radius: 5px;
  background-color: var(--primary-color);
  color: var(--text-color);
  box-sizing: border-box;
}

.btn-submit {
  width: 100%;
  padding: 0.8rem;
  background: var(--accent-color);
  color: #fff;
  font-weight: 600;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-submit:hover {
  opacity: 0.85;
}


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

.social-links a {
  color: var(--primary-color);
  margin: 0 0.7rem;
  font-size: 1.5rem;
  transition: opacity 0.3s ease;
}

.social-links a:hover {
  opacity: 0.7;
}

/* Responsive Scaling */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }

  nav ul {
    display: none; /* Simple hiding for small screens, can be replaced with a hamburger menu */
  }

  .about-container {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  section {
    padding: 3rem 1rem;
  }

  h1 {
    font-size: 2rem;
  }

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

  .btn {
    padding: 0.6rem 1.2rem;
    width: 100%;
    box-sizing: border-box;
    margin: 0.5rem 0;
  }
}