/* * CSS VARIABLES
         *  Dark/Neon Futuristic Palette
         */
:root {
    --bg-color: #0f0f11;
    /* Deep dark background */
    --card-bg: #1a1a1d;
    /* Slightly lighter for cards */
    --text-color: #e0e0e0;
    /* Off-white text for readability */
    --heading-color: #ffffff;
    /* Pure white for headings */
    --accent-color: #00f3ff;
    /* Neon Cyan */
    --secondary-accent: #ff00ff;
    /* Neon Magenta (for gradients/hovers) */
    --nav-bg: rgba(15, 15, 17, 0.95);
    --font-main: "Helvetica Neue", Helvetica, Arial, sans-serif;
    --border-radius: 8px;
    /* Slightly rounded corners */
}

/* RESET & BASE STYLES */
html {
    scroll-behavior: smooth;
    /* Added smooth scrolling */
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3 {
    color: var(--heading-color);
    letter-spacing: -0.5px;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

/* Keyframes for fadeIn animation on the whole page */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

/* NAVIGATION */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent-color);
    text-shadow: 0 0 10px rgba(0, 243, 255, 0.3);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
    position: relative;
}

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

/* Hamburger Menu Button (Hidden on Desktop) */
.hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--heading-color);
    transition: all 0.3s ease;
}

/* HERO SECTION - Refactored to Flexbox */
.hero {
    display: flex;
    flex-wrap: wrap;
    /* Allows stacking on mobile */
    align-items: center;
    justify-content: space-between;
    min-height: 90vh;
    padding: 4rem 5%;
    gap: 3rem;
    background: radial-gradient(circle at top right,
            rgba(0, 243, 255, 0.05),
            transparent 40%);
    animation: fadeIn 1.5s ease-out;
}

.hero-text {
    flex: 1 1 400px;
    /* Flex-grow, Flex-shrink, Basis */
}

.hero-text h1 {
    font-size: clamp(3rem, 5vw, 4.5rem);
    /* Responsive font size */
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

/* Neon text span for emphasis */
.highlight {
    color: var(--secondary-accent);
}

.hero-text p {
    font-size: 1.2rem;
    color: #aaa;
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: transparent;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: bold;
    box-shadow: 0 0 10px rgba(0, 243, 255, 0.2);
    transition: all 0.3s ease;
}

.cta-button:hover {
    background: var(--secondary-accent);
    color: #000;
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.6);
}

.hero-image {
    flex: 1 1 400px;
    height: 500px;
    border-radius: var(--border-radius);
    position: relative;
    animation: fadeIn 1.5s ease-out;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--border-radius);
    filter: grayscale(20%) contrast(110%);
    /* Edgy look */
    box-shadow: 20px 20px 25px rgba(40, 137, 228, 0.654);
    /* Offset border effect */
}

/* WHAT I DO SECTION */
.what-i-do {
    padding: 6rem 5%;
    background-color: #151518;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 4rem;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-title::after {
    content: "";
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent-color);
    margin: 10px auto 0;
    box-shadow: 0 0 8px var(--accent-color);
}

/* Flexbox for Services */
.services-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
}

.service-card {
    flex: 1 1 300px;
    /* Flexbox responsive behavior */
    padding: 2.5rem;
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition:
        transform 0.3s ease,
        border-color 0.3s ease;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
}

.service-card h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
    color: var(--accent-color);
}

/* PORTFOLIO SECTION */
.portfolio {
    padding: 6rem 5%;
}

/* Flexbox for Portfolio */
.portfolio-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: space-between;
}

.portfolio-card {
    flex: 1 1 300px;
    background-color: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.portfolio-card:hover {
    transform: scale(1.02);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    z-index: 2;
}

.portfolio-img {
    height: 250px;
    overflow: hidden;
}

.portfolio-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-card:hover .portfolio-img img {
    transform: scale(1.1);
}

.portfolio-info {
    padding: 1.5rem;
    border-top: 2px solid var(--accent-color);
}

.portfolio-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.portfolio-info p {
    font-size: 0.9rem;
    color: #888;
    font-family: monospace;
    /* Tech feel */
}

/* CONTACT SECTION */
.contact {
    padding: 6rem 5%;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.contact form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    text-align: left;
    background: var(--card-bg);
    padding: 3rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

label {
    font-size: 0.9rem;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-color);
}

input,
textarea {
    padding: 1rem;
    border: 1px solid #333;
    background-color: #0f0f11;
    color: #fff;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--secondary-accent);
    box-shadow: 0 0 5px rgba(0, 243, 255, 0.3);
}

/* Footer */
footer {
    padding: 2rem 5%;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: #555;
    background-color: #0d0d0f;
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
        /* Замість none */
    }

    .nav-links {
        position: absolute;
        top: 100%;
        right: 0;
        background-color: var(--nav-bg);
        flex-direction: column;
        width: 200px;
        padding: 1rem;
        display: none;
        /* спочатку приховане */
    }

    .nav-links.active {
        display: flex;
        /* показуємо при кліку */
    }
}