:root {
  --primary-color: #22ccb2;
  --secondary-color: #2c3e50;
  --text-color: #333;
  --light-bg: #f8f9fa;
  --white: #ffffff;
  --gradient-start: #667eea;
  --gradient-end: #764ba2;
}

[data-theme="dark"] {
  --secondary-color: #e0e0e0;
  --text-color: #e0e0e0;
  --light-bg: #1a1a1a;
  --white: #2d2d2d;
  --gradient-start: #4a5568;
  --gradient-end: #2d3748;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: background-color 0.3s ease, color 0.3s ease;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text-color);
  line-height: 1.6;
  background-color: var(--white);
}

/* Theme Toggle */
.theme-controls {
  position: fixed;
  top: 100px;
  right: 20px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.control-btn {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary-color);
  color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: all 0.3s;
  font-size: 1.2rem;
}

.control-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Navbar */
.navbar {
  background: var(--white);
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
  padding: 1rem 0;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--primary-color) !important;
}

.nav-link {
  color: var(--text-color) !important;
  font-weight: 500;
  margin: 0 0.5rem;
  transition: color 0.3s;
}

.nav-link:hover {
  color: var(--primary-color) !important;
}

/* Hero Section */
.hero {
  background: linear-gradient(
    135deg,
    var(--gradient-start) 0%,
    var(--gradient-end) 100%
  );
  color: white;
  padding: 150px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero .lead {
  font-size: 1.5rem;
  margin-bottom: 2rem;
}

.hero .typing-text {
  font-size: 1.2rem;
  color: var(--primary-color);
  font-weight: 500;
}

.btn-primary-custom {
  background: var(--primary-color);
  border: none;
  padding: 12px 30px;
  font-weight: 600;
  border-radius: 50px;
  transition: transform 0.3s, box-shadow 0.3s;
  color: white;
}

.btn-primary-custom:hover {
  background: #1ab89f;
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(34, 204, 178, 0.3);
  color: white;
}

.btn-outline-custom {
  border: 2px solid white;
  color: white;
  padding: 12px 30px;
  font-weight: 600;
  border-radius: 50px;
  transition: all 0.3s;
}

.btn-outline-custom:hover {
  background: white;
  color: var(--gradient-start);
}

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

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 700;
  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: 3px;
  background: var(--primary-color);
}

/* About Section */
.about-section {
  padding: 80px 0;
  background: var(--light-bg);
}

.about-info {
  padding: 2rem;
}

.info-item {
  display: flex;
  margin-bottom: 1rem;
}

.info-item i {
  color: var(--primary-color);
  font-size: 1.5rem;
  margin-right: 1rem;
}

/* Skills Section */
.skills-section {
  padding: 80px 0;
  background: var(--white);
}

.skill-card {
  background: var(--light-bg);
  border-radius: 15px;
  padding: 2rem;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s, box-shadow 0.3s;
  height: 100%;
}

.skill-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

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

.skill-card h4 {
  color: var(--text-color);
  margin-bottom: 1rem;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  background: var(--white);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--text-color);
  border: 2px solid var(--primary-color);
  transition: all 0.3s;
}

.skill-tag:hover {
  background: var(--primary-color);
  color: white;
  transform: scale(1.05);
}

/* Projects Section */
.projects-section {
  padding: 80px 0;
  background: var(--light-bg);
}

.project-card {
  background: var(--white);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s, box-shadow 0.3s;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.project-img {
  height: 200px;
  background: linear-gradient(
    135deg,
    var(--gradient-start) 0%,
    var(--gradient-end) 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: white;
}

.project-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.project-card h4 {
  color: var(--text-color);
  margin-bottom: 1rem;
}

.project-description {
  flex: 1;
  margin-bottom: 1rem;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
  margin-bottom: 1rem;
}

.project-tech-badge {
  background: var(--primary-color);
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.8rem;
}

.project-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.project-link {
  padding: 8px 20px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.project-link-github {
  background: var(--secondary-color);
  color: white;
}

.project-link-demo {
  background: var(--primary-color);
  color: white;
}

.project-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* Contact Section */
.contact-section {
  padding: 80px 0;
  background: var(--white);
}

.contact-info {
  background: var(--light-bg);
  border-radius: 15px;
  padding: 2rem;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.contact-item {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
}

.contact-item i {
  font-size: 2rem;
  color: var(--primary-color);
  margin-right: 1rem;
}

.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  justify-content: center;
}

.social-link {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  transition: transform 0.3s, background 0.3s;
}

.social-link:hover {
  transform: translateY(-5px);
  background: var(--secondary-color);
  color: white;
}

/* Footer */
footer {
  background: var(--secondary-color);
  color: white;
  text-align: center;
  padding: 2rem 0;
}

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

  .hero .lead {
    font-size: 1.2rem;
  }

  .theme-controls {
    top: 80px;
    right: 10px;
  }

  .control-btn {
    width: 45px;
    height: 45px;
    font-size: 1rem;
  }
}