:root {
    --bg-color: #0D1117;
    --surface-color: #161B22;
    --glass-bg: rgba(22, 27, 34, 0.7);
    
    --primary-color: #A779E9;     
    --primary-color-dark: #8E44AD;
    
    --text-color: #F0F0F0;
    --text-color-secondary: #8B949E;
    
    --border-color: rgba(255, 255, 255, 0.1); 

    --header-height: 70px;
}

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.4s ease-in-out;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-color-dark));
    background-size: 200% 200%;
    color: #fff;
    box-shadow: 0 4px 20px rgba(167, 121, 233, 0.2);
}

.btn-primary:hover {
    background-position: right center;
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(167, 121, 233, 0.3);
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.05rem;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    color: #fff;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-color-secondary);
    margin-bottom: 4rem;
}

.header {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    
    background-color: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    
    transition: background-color 0.3s ease;
}

.header.scrolled {
    background-color: var(--surface-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-color-secondary);
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-links a:hover::after {
    width: 100%;
}

.nav-links .btn-primary:hover {
    color: #fff;
}
.nav-links .btn-primary::after {
    display: none;
}

.hamburger {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: var(--header-height);
    background: linear-gradient(rgba(13, 17, 23, 0.8), rgba(13, 17, 23, 1)), url('https://via.placeholder.com/1920x1080/111/333?text=Hero+Background') no-repeat center center/cover;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: #fff;
}

.highlight {
    background: linear-gradient(90deg, var(--primary-color), #c399f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-color-secondary);
    max-width: 650px;
    margin: 0 auto 2.5rem;
}

section {
    padding: 6rem 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    background-color: var(--surface-color);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    
    background: rgba(22, 27, 34, 0.5); 
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 0 25px rgba(167, 121, 233, 0.2);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    width: 70px;
    height: 70px;
    line-height: 70px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-color-dark));
    color: #fff;
    margin: 0 auto 1.5rem;
    box-shadow: 0 0 20px rgba(167, 121, 233, 0.3);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #fff;
}

.card-description {
    font-size: 1rem;
    color: var(--text-color-secondary);
}

.portfolio {
    background-color: var(--bg-color);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.portfolio-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.portfolio-item img {
    transition: transform 0.4s ease;
}

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(to top, rgba(13, 17, 23, 0.95), transparent);
    padding: 2.5rem 1.5rem 1.5rem;
    transform: translateY(100%);
    opacity: 0;
    transition: all 0.4s ease;
}

.portfolio-overlay h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 0.25rem;
}

.portfolio-overlay span {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 500;
}

.portfolio-item:hover .portfolio-overlay {
    transform: translateY(0);
    opacity: 1;
}

.portfolio-item:hover img {
    transform: scale(1.05);
}

.contact {
    background-color: var(--surface-color);
    border-radius: 20px;
    max-width: 1140px;
    margin: 0 auto;
}

.contact-form {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-form .form-group {
    display: flex;
    gap: 1.5rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem 1.2rem;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-color);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-color-secondary);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(167, 121, 233, 0.25);
}

.contact-form button {
    align-self: center;
    margin-top: 1rem;
}

.footer {
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 2rem;
    text-align: center;
    color: var(--text-color-secondary);
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    font-size: 1.5rem;
    transition: color 0.3s ease, transform 0.3s ease;
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
}

.hidden {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

@media (max-width: 992px) {
    .container {
        padding: 0 2rem;
    }
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .portfolio-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    .hero-title {
        font-size: 3.2rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--surface-color); 
        flex-direction: column;
        justify-content: center;
        gap: 3rem;
        transition: left 0.4s ease-in-out;
        border-top: 1px solid var(--border-color);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-links a {
        font-size: 1.5rem;
        color: var(--text-color);
    }
    
    .nav-links .btn {
        font-size: 1.5rem;
        padding: 1rem 2rem;
    }
    
    .hamburger {
        display: block;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    .hero-description {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form .form-group {
        flex-direction: column;
    }
}