:root {
  --color-primary: #6a11cb;
  --color-secondary: #2575fc;
  --color-bg-light: #f0f0f3;
  --color-bg-dark: #121212;
  --color-glass-light: rgba(255, 255, 255, 0.25);
  --color-glass-dark: rgba(0, 0, 0, 0.35);
  --color-text-light: #222;
  --color-text-dark: #ddd;
  --color-accent-light: #2575fc;
  --color-accent-dark: #6a11cb;
  --transition-speed: 0.3s;
  --font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  --shadow-light: rgba(0, 0, 0, 0.15);
  --shadow-dark: rgba(255, 255, 255, 0.1);
}

:root[data-theme="dark"] {
  --background: var(--color-bg-dark);
  --glass-bg: var(--color-glass-dark);
  --text-color: var(--color-text-dark);
  --accent-color: var(--color-accent-dark);
  --shadow-color: var(--shadow-dark);
}

:root[data-theme="light"] {
  --background: var(--color-bg-light);
  --glass-bg: var(--color-glass-light);
  --text-color: var(--color-text-light);
  --accent-color: var(--color-accent-light);
  --shadow-color: var(--shadow-light);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: var(--font-family);
  background: var(--background);
  color: var(--text-color);
}

/* ==============header-section==========> */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 3rem;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 30px var(--shadow-color);
  z-index: 1000;
  border-radius: 0 0 20px 20px;
  transition: background var(--transition-speed);
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(
    45deg,
    var(--color-primary),
    var(--color-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  user-select: none;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}
nav ul li a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.5rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
}
nav ul li a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--accent-color);
  transition: width 0.3s ease;
  border-radius: 4px;
}
nav ul li a:hover::after,
nav ul li a.active::after {
  width: 100%;
}

nav ul li a:hover,
nav ul li a.active {
  color: var(--accent-color);
}
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.4rem;
  color: var(--text-color);
  padding: 8px;
  border-radius: 50%;
  transition: background 0.3s ease;
}
.theme-toggle:hover {
  background: var(--accent-color);
  color: white;
}

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--text-color);
  cursor: pointer;
  z-index: 1100;
}
.hamburger:hover {
  color: var(--accent-color);
}

/* ===========home-sections============> */

.home {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8rem 10%;
  background: var(--background);
  transition: background var(--transition-speed);
  min-height: 100vh;
  gap: 2rem;
}
.home-content {
  flex: 1;
  animation: fadeInUp 0.8s ease-out;
}
.home-content h1 {
  font-size: 3rem;
  font-weight: 700;
}
.home-content h1 span {
  background: linear-gradient(
    45deg,
    var(--color-primary),
    var(--color-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.typing-text {
  font-size: 1.4rem;
  font-weight: 500;
  margin: 0.5rem 1.5rem;
  color: var(--accent-color);
  animation: typing 3s steps(30, end) infinite;
  white-space: nowrap;
  overflow: hidden;
  border-right: 2px solid var(--accent-color);
  width: 0;
}
@keyframes typing {
  0%,
  100% {
    width: 0;
  }
  50% {
    width: 100%;
  }
}
.home-content p {
  font-size: 1rem;
  margin-bottom: 2rem;
  color: var(--text-color);
  max-width: 500px;
  line-height: 1.6;
}
.home--buttons {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-color);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.3s ease;
  box-shadow: 0 6px 151px var(--shadow-color);
}
.btn:hover {
  background: linear-gradient(
    45deg,
    var(--color-primary),
    var(--color-secondary)
  );
}
.btn.secondary {
  background: transparent;
  border: 2px solid var(--accent-color);
  color: var(--accent-color);
}
.btn.secondary:hover {
  background: var(--accent-color);
  color: white;
}
.home-image {
  flex: 1;
  display: flex;
  justify-content: center;
  animation: fadeInUp 1s ease-out;
}
.home-image img {
  width: 100%;
  max-width: 450px;
  border-radius: 20px;
  box-shadow: 0 8px 30px;
}
@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}
@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =============about-section===========> */

.about {
  padding: 5rem 3rem;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border-radius: 20px;
  margin: 6rem auto;
  max-width: 900px;
  box-shadow: 0 4px 30px var(--shadow-color);
  color: var(--text-color);
  transition: background 0.3s ease;
}
.about-container h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(
    45deg,
    var(--color-primary),
    var(--color-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.about-container p {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 1.3rem;
  color: var(--text-color);
}

/* ======projects-sections=======> */
.projects {
  padding: 5rem 3rem;
  background: var(--background);
  color: var(--text-color);
  text-align: center;
}
.projects h2 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  background: linear-gradient(
    45deg,
    var(--color-primary),
    var(--color-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.projects-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.project-card {
  background: var(--glass-bg);
  padding: 2rem;
  border-radius: 16px;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px var(--shadow-color);
  transition: transform 0.3s ease;
  text-align: left;
}
.project-card:hover {
  transform: translateY(-5px);
}
.project-icon {
  font-size: 2rem;
  color: var(--accent-color);
  margin-bottom: 1rem;
}
.project-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.8rem;
}
.project-card p {
  font-size: 1rem;
  margin-bottom: 1rem;
  color: var(--text-color);
}
.project-link {
  text-decoration: none;
  color: var(--accent-color);
  font-weight: bold;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: color 0.3s ease;
}
.project-link:hover {
  color: var(--color-primary);
}
/* ==========contact-section==========> */
.contact {
  padding: 5rem 3rem;
  text-align: center;
  background: var(--background);
  color: var(--text-color);
}
.contact h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(
    45deg,
    var(--color-primary),
    var(--color-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.contact p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
}
.contact-form {
  background: var(--glass-bg);
  padding: 2rem;
  border-radius: 16px;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px var(--shadow-color);
  max-width: 700px;
  margin: auto;
}
.form-group {
  display: flex;
  gap: 1rem;
  flex-direction: column;
}
.form-group input {
  padding: 1rem;
  border: none;
  border-radius: 10px;
  background: var(--background);
  color: var(--text-color);
  font-size: 1rem;
}
textarea {
  width: 100%;
  padding: 1rem;
  margin-top: 1rem;
  border: none;
  border-radius: 10px;
  background: var(--background);
  color: var(--text-color);
  font-size: 1rem;
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--accent-color);
}

.contact-form .btn {
  margin-top: 1rem;
  padding: 0.8rem 2rem;
  background: var(--accent-color);
  color: #fff;
  font-weight: bold;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.3s ease;
}
.contact-form .btn:hover {
  background: var(--color-primary);
}
.contact-social {
  margin-bottom: 1rem;
  margin-top: 0.7rem;
}
.contact-social a {
  font-size: 1.5rem;
  color: var(--accent-color);
  margin: 0 0.5rem;
  transition: color 0.3s ease;
}
.contact-social a:hover {
  color: var(--color-primary);
}
@media (max-width: 780px) {
  nav ul {
    position: fixed;
    flex-direction: column;
    top: 70px;
    right: 0;
    background: var(--glass-bg);
    width: 220px;
    height: calc(100vh - 70px);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    padding-top: 2rem;
    box-shadow: -4px 0 30px var(--shadow-color);
    border-radius: 20px 0 0 20px;
    backdrop-filter: blur(12px);
    z-index: 1000;
  }
  nav ul.open {
    transform: translateX(0);
  }
  nav ul li {
    margin: 1rem 0;
    text-align: center;
  }
  .hamburger {
    display: block;
  }

  /* ====home====> */

  .home {
    flex-direction: column-reverse;
    padding: 6rem 1.5rem;
    text-align: center;
  }
  .home-content h1 {
    font-size: 2.2rem;
  }
  .home-image img {
    max-width: 300px;
  }
  .home--buttons {
    justify-content: center;
    flex-wrap: wrap;
  }
}