body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    scroll-behavior: smooth;
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden;
}

body.dark-mode {
    background: linear-gradient(135deg, #1c1e23, #343a40);
    color: #f1f1f1;
}

header {
    background: linear-gradient(135deg, #343a40, #495057);
    color: white;
    padding: 70px 0;
    text-align: center;
    animation: fadeIn 1s ease;
}

.navbar {
    background-color: #333;
}

.navbar-dark .navbar-brand .navbar-nav .nav-link {
    color: #fff;
    transition: color 0.3s;
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: #ffa500;
}

.service-card,
.project-card,
.testimonial {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #dee2e6;
    border-radius: 0.25rem;
    overflow: hidden;
    background: white;
    opacity: 0;
    animation: fadeIn 1s ease;
    padding: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.project-container {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.project-card {
    flex: 0 1 calc(50% - 20px);
    margin: 10px;
}

body.dark-mode .service-card,
body.dark-mode .project-card,
body.dark-mode .testimonial {
    background: #495057;
    color: #f1f1f1;
    border: 1px solid #dee2e6;
    box-shadow: none;
}

.service-card:hover,
.project-card:hover,
.testimonial:hover {
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transform: translateY(-5px);
}

body.dark-mode .service-card:hover,
body.dark-mode .project-card:hover,
body.dark-mode .testimonial:hover {
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.btn {
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn:hover {
    background-color: #007bff;
    transform: translateY(-2px);
}

.btn-toggle {
    display: flex;
    align-items: center;
    top: 20%;
    justify-content: center;
    background: linear-gradient(135deg, #ccc, #eee);
    border: none;
    cursor: pointer;
    padding: 15px;
    position: relative;
    margin-left: 15px;
    border-radius: 5px;
    transition: background 0.3s, box-shadow 0.3s;
}

.btn-toggle:hover {
    background: #ffa500;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.toggle-icon {
    font-size: 1.5rem;
    position: absolute;
    transition: opacity 0.3s, transform 0.3s;
    transform: translateY(-50%);
}

body.dark-mode .toggle-icon.sun {
    opacity: 0;
    transform: scale(0.5);
}

body.dark-mode .toggle-icon.moon {
    opacity: 1;
    transform: scale(1);
}

body:not(.dark-mode) .toggle-icon.moon {
    opacity: 0;
    transform: scale(0.5);
}

body:not(.dark-mode) .toggle-icon.sun {
    opacity: 1;
    transform: scale(1);
}

footer {
    background-color: #343a40;
    color: white;
    padding: 20px 0;
    text-align: center;
}

body.dark-mode footer {
    background-color: #2d2f31;
}

h3 {
    margin-top: 30px;
    margin-bottom: 20px;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

@keyframes fadeInSlide {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

.section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

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

.card {
    flex: 0 1 calc(33.333% - 1rem);
    margin-bottom: 1rem;
    animation: fadeInSlide 0.5s ease forwards;
}

@media (max-width: 768px) {
    .card {
        flex: 0 1 calc(50% - 1rem);
    }
}

@media (max-width: 576px) {
    .card {
        flex: 0 1 100%;
    }
}

@media (max-width: 768px) {
    .navbar-nav .nav-link {
        font-size: 0.9rem;
    }

    .service-card,
    .project-card {
        margin-bottom: 20px;
    }
}

.section {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

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