:root {
  --primary-color: #0073e6;
  --secondary-color: #00a8e8;
  --accent-color: #7209b7;
  --light-bg: #ffffff;
  --dark-bg: #121212;
  --light-text: #333333;
  --dark-text: #ffffff;
  --transition-speed: 0.3s;
}

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

html {
  scroll-behavior: smooth;
  height: 100%;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  min-height: 100%;
  transition: background-color var(--transition-speed),
    color var(--transition-speed);
  overflow-x: hidden;
  color: var(--light-text);
  background-color: var(--light-bg);
}

body.dark-theme {
  background-color: var(--dark-bg);
  color: var(--dark-text);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.5rem;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px 0;
  background: var(--light-text);
  transition: var(--transition-speed);
}

.dark-theme .hamburger span {
  background: var(--dark-text);
}

/* Navbar Styles */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  transition: all var(--transition-speed);
}

.dark-theme .navbar {
  background: rgba(18, 18, 18, 0.95);
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
  text-decoration: none;
  z-index: 1001;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--light-text);
  font-weight: 500;
  transition: color var(--transition-speed);
  position: relative;
}

.dark-theme .nav-links a {
  color: var(--dark-text);
}

.nav-links a::after {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 0;
  background-color: var(--primary-color);
  transition: width var(--transition-speed);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Header Styles */
header {
  position: relative;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  clip-path: polygon(0 0, 100% 0, 100% 85%, 0 100%);
  margin-top: 60px;
}

.header-content {
  max-width: 800px;
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s ease forwards;
  color: var(--light-bg);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.header-content h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  margin-bottom: 1rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.typing-text {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  min-height: 2.5em;
  margin: 1rem 0;
}

.social-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 2rem;
}

.social-links a {
  color: var(--light-bg);
  font-size: 1.5rem;
  transition: transform var(--transition-speed);
}

.social-links a:hover {
  transform: translateY(-3px);
}

/* Section Styles */
section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.5s, transform 0.5s;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

section h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  margin-bottom: 2rem;
  text-align: center;
  color: var(--primary-color);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  padding: 2rem 0;
}

.skill-card {
  background: var(--light-bg);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.skill-card:hover::before {
  transform: scaleX(1);
}

.dark-theme .skill-card {
  background: #2a2a2a;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.skill-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

.skill-card i {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 2.5rem;
  transition: transform 0.3s ease;
}

.skill-card:hover i {
  transform: scale(1.1);
}

.skill-card h3 {
  color: var(--light-text);
  margin: 1rem 0;
  font-size: 1.2rem;
}

.dark-theme .skill-card h3 {
  color: var(--dark-text);
}

.skill-card p {
  color: var(--light-text);
  font-size: 0.9rem;
  line-height: 1.4;
}

.dark-theme .skill-card p {
  color: var(--dark-text);
}

@media (max-width: 768px) {
  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
  }

  .skill-card {
    padding: 1.5rem;
  }
}

/* Portfolio Grid */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  padding: 2rem 0;
}

.portfolio-item {
  position: relative;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s;
  aspect-ratio: 4/3;
}

.portfolio-item:hover {
  transform: translateY(-10px);
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.portfolio-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 1rem;
  transform: translateY(100%);
  transition: transform 0.3s;
}

.portfolio-item:hover .portfolio-overlay {
  transform: translateY(0);
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  padding: 2rem;
  background: var(--light-bg);
  border-radius: 15px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.dark-theme .contact-form {
  background: #2a2a2a;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  width: 100%;
  padding: 0.8rem;
  border: 2px solid transparent;
  border-radius: 8px;
  background: #f5f5f5;
  transition: all 0.3s;
  color: var(--light-text);
}

.dark-theme .form-group input,
.dark-theme .form-group textarea {
  background: #404040;
  color: var(--dark-text);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  background: var(--light-bg);
}

.dark-theme .form-group input:focus,
.dark-theme .form-group textarea:focus {
  background: #404040;
}

.submit-btn {
  background: linear-gradient(
    45deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  padding: 1rem 2rem;
  border: none;
  border-radius: 25px;
  font-size: 1.1rem;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
  width: 100%;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.submit-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 15px rgba(0, 115, 230, 0.4);
}

.submit-btn:active {
  transform: translateY(-1px);
}

/* Success Message */
.success-message {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--light-bg);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  text-align: center;
  z-index: 1000;
  animation: fadeIn 0.3s ease;
}

.dark-theme .success-message {
  background: #2a2a2a;
  color: var(--dark-text);
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  background: #f0f0f0;
  transition: background-color var(--transition-speed);
  z-index: 1001;
}

.dark-theme .theme-toggle {
  background: #2a2a2a;
  color: var(--dark-text);
}

/* Mobile Styles */
@media (max-width: 768px) {
  .navbar {
    padding: 1rem;
  }

  .hamburger {
    display: block;
    z-index: 1001;
  }

  .nav-links {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--light-bg);
    padding: 5rem 2rem;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    transform: translateX(-100%);
    transition: transform var(--transition-speed);
  }

  .dark-theme .nav-links {
    background: var(--dark-bg);
  }

  .nav-links.active {
    transform: translateX(0);
  }

  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }

  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .header-content {
    padding: 0 1rem;
  }
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus styles */
a:focus,
button:focus,
input:focus,
textarea:focus {
  outline: 3px solid var(--accent-color);
  outline-offset: 2px;
}