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

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

.wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background: #f4f4f4;
  color: #333;
}

header {
  background: #333;
  color: #fff;
  padding: 5px;
}

h2 {
  text-align: center;
  margin-bottom: 15px;
}

.welcome {
  margin: 20px;
  padding: 10px;
}

.welcome p {
  text-align: center;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  margin: 5px;
}

.menu-toggle {
  background: none;
  border: none;
  font-size: 2rem;
  color: white;
  display: none;
  cursor: pointer;
  position: absolute;
  top: 1rem;
  right: 1rem;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #fff;
    margin: 5px 0;
    transition: all 0.3s ease;
}


nav ul.nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
  justify-content: center;
  background: #333;
  padding: 0.5rem 1.5rem;
}

nav ul.nav-links li a {
  color: white;
  text-decoration: none;
  transition: color 0.3s ease;
}

nav ul.nav-links li a:hover {
  color: #00bcd4;
}

:root {
  --bg: #f4f4f4;
  --text: #333;
  --nav-bg: #333;
  --nav-text: white;
  --accent: #00bcd4;
}

body {
  background: var(--bg);
  color: var(--text);
  transition: background 0.5s, color 0.5s;
}

/* Dark Theme */
body.dark-mode {
  --bg: #121212;
  --text: #eee;
  --nav-bg: #1f1f1f;
  --nav-text: #f4f4f4;
  --accent: #00e0ff;
}

header {
  background: var(--nav-bg);
  color: var(--nav-text);
  transition: background 0.5s ease;
}

nav ul.nav-links li a {
  color: var(--nav-text);
}

nav ul.nav-links li a:hover {
  color: var(--accent);
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--nav-text);
  margin-right: 3rem;
}

.nav-actions {
  display: flex;
  align-items: center;
}

/* Slide-in animation for menu items */
.nav-links li {
  opacity: 0;
  transform: translateY(-10px);
  animation: slideIn 0.5s forwards;
  animation-delay: calc(0.1s * var(--i));
}

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

/* Toggle button animation */
.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Responsive menu */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  .header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  nav ul {
    position: fixed;
    top: 60px;
    right: -250px;
    background-color: var(--nav-bg);
    padding: 1rem;
    width: 250px;
    transition: right 0.5s ease;
    z-index: 1000;
    flex-direction: column;
    align-items: center;
  }
  nav ul.show {
    right: 0;
    background-color: var(--nav-bg);
  }
  nav ul li {
    margin-bottom: 0.5rem;
  }
  nav ul li a {
    margin: 0;
  }
}

/* Fade-in for page sections */
main section {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeIn 1s ease forwards;
  animation-delay: 0.3s;
}

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

.testimonials {
  padding: 3rem 1rem;
  text-align: center;
  background: var(--bg);
}

.testimonials h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
}

.testimonial-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.testimonial-card {
  background: var(--nav-bg);
  color: var(--nav-text);
  padding: 1.5rem;
  border-radius: 15px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  transition: transform 0.3s ease;
  animation: fadeIn 1s ease forwards;
}

.testimonial-card:hover {
  transform: translateY(-10px);
}

.projects {
  padding: 3rem 1rem;
  background: var(--bg);
  text-align: center;
}

.projects h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
}

.project-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--nav-bg);
  color: var(--nav-text);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  transition: transform 0.3s ease;
  animation: fadeIn 1s ease forwards;
}

.project-card:hover {
  transform: scale(1.03);
}

.project-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.project-card h3 {
  margin: 1rem 0 0.5rem;
}

.project-card p {
  padding: 0 1rem;
  font-size: 0.95rem;
}

.project-btn {
  display: inline-block;
  margin: 1rem;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #000;
  border-radius: 8px;
  text-decoration: none;
  transition: background 0.3s ease;
}

.project-btn:hover {
  background: #0099aa;
}

/* Footer styles */
footer {
  background: var(--nav-bg);
  color: var(--nav-text);
  text-align: center;
  padding: 1rem 0;
}

/* image slider */
.slider {
  position: relative;
  overflow: hidden;
  max-width: 600px;
  margin: 2rem auto;
}

.carousel-inner {
  position: relative;
  display: flex;
}

.carousel-img {
  display: none;
  width: 100%;
  height: auto;
  transition: transform 0.6s ease, opacity 0.6s ease;
  border-radius: 10px;
}

.carousel-img.active {
  display: block;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.5);
  color: #fff;
  border: none;
  padding: 1rem;
  cursor: pointer;
  z-index: 2;
}

.prev { left: 0; }
.next { right: 0; }

.carousel-dots {
  text-align: center;
  margin-top: 1rem;
}

.dot {
  display: inline-block;
  height: 12px;
  width: 12px;
  margin: 0 5px;
  background-color: #bbb;
  border-radius: 50%;
  cursor: pointer;
}

.dot.active {
  background-color: #717171;
}

/* contact */
form {
  margin: 20px;
}

form input,
form textarea {
  padding: 3px;
  border-radius: 3px;
}

#send {
  padding: 5px;
}