:root {
  --bg-color: #f0f4f8;
  --text-color: #333;
  --card-bg: white;
  --header-bg: linear-gradient(135deg, #6e8efb, #a777e3);
  --link-color: #6e8efb;
  --link-hover: #a777e3;
  --nav-bg: rgba(255, 255, 255, 0.8);
  --nav-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --footer-bg: #e9ecef;
}

.dark-mode {
  --bg-color: #121212;
  --text-color: #e0e0e0;
  --card-bg: #1e1e1e;
  --header-bg: linear-gradient(135deg, #4a6491, #7d5da9);
  --link-color: #8ab4ff;
  --link-hover: #c5a8ff;
  --nav-bg: rgba(30, 30, 30, 0.8);
  --nav-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  --footer-bg: #1e1e1e;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Montserrat", sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 20px 20px;
  transition: background-color 0.3s, color 0.3s;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--nav-shadow);
  z-index: 1000;
  padding: 1rem 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px 0;
    background-color: var(--text-color);
    transition: all 0.3s ease-in-out;
}


.nav-brand {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-color);
  text-decoration: none;
}

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

.nav-item a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 400;
  transition: color 0.3s ease;
}

.nav-item a:hover {
  color: var(--link-color);
}

header {
  background: var(--header-bg);
  color: white;
  padding: 3rem 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

header h1 {
  margin: 0;
  font-size: 3rem;
  font-weight: 600;
}

.devcard {
  max-width: 250px;
  border-radius: 15px;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 3px solid rgba(255, 255, 255, 0.5);
}

.devcard:hover {
  transform: scale(1.05) translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

main {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

section {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

section:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

h2 {
  color: var(--text-color);
  border-bottom: 3px solid var(--link-color);
  padding-bottom: 0.5rem;
  margin-top: 0;
  font-weight: 600;
}

ul {
  list-style-type: none;
  padding-left: 0;
}

li {
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
}

li::before {
    content: "›";
    margin-right: 10px;
    color: var(--link-color);
    font-weight: bold;
    font-size: 1.2em;
}

a {
  color: var(--link-color);
  text-decoration: none;
  font-weight: 400;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.certifications {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
  align-items: center;
}

.certifications a {
  display: inline-block;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.certifications a:hover {
  transform: scale(1.1);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.certifications img {
  width: 100px;
  height: 100px;
  border-radius: 15px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

footer {
  text-align: center;
  margin-top: 3rem;
  padding: 2rem;
  background-color: var(--footer-bg);
  border-radius: 10px;
  box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.05);
}

.social-links a {
    margin: 0 10px;
    display: inline-block;
    transition: transform 0.3s ease;
}

.social-links a:hover {
    transform: scale(1.1);
}

.social-links img {
    width: 32px;
    height: 32px;
}

.mode-toggle {
  width: 60px;
  height: 30px;
  background-color: #ccc;
  border-radius: 15px;
  display: flex;
  align-items: center;
  cursor: pointer;
  position: relative;
  transition: background-color 0.3s;
}

.mode-toggle::before {
  content: "☀️";
  position: absolute;
  left: 5px;
  font-size: 20px;
  transition: opacity 0.3s;
}

.mode-toggle::after {
  content: "🌙";
  position: absolute;
  right: 5px;
  font-size: 20px;
  opacity: 0;
  transition: opacity 0.3s;
}

.toggle-switch {
  width: 26px;
  height: 26px;
  background-color: white;
  border-radius: 50%;
  position: absolute;
  left: 2px;
  transition: transform 0.3s;
}

.dark-mode .mode-toggle {
  background-color: #444;
}

.dark-mode .mode-toggle::before {
  opacity: 0;
}

.dark-mode .mode-toggle::after {
  opacity: 1;
}

.dark-mode .toggle-switch {
  transform: translateX(30px);
}

@media (max-width: 992px) {
    header {
        flex-direction: column;
        text-align: center;
    }
    .devcard {
        margin-top: 2rem;
    }
}

@media (max-width: 768px) {
  body {
    padding-top: 70px;
  }
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background-color: var(--card-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    transition: right 0.3s ease-in-out;
    box-shadow: -5px 0 15px rgba(0,0,0,0.1);
  }

  .nav-menu.active {
      right: 0;
  }

  .hamburger {
      display: block;
  }

  .nav-open .hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav-open .hamburger span:nth-child(2) {
    opacity: 0;
  }
  .nav-open .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  header h1 {
    font-size: 2.5rem;
  }
}