/* ===== CSS VARIABLES ===== */
:root {
    --primary-color: #00d4ff;
    --secondary-color: #080808;
    --background-color: #111111;
    --text-color: #cccccc;
    --heading-color: #ffffff;
    --container-width: 1100px;
}

/* ===== GLOBAL STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

.section-padding {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    color: var(--heading-color);
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
}

/* ===== BUTTONS ===== */
.btn {
    padding: 12px 28px;
    border-radius: 40px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

.btn-primary:hover {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

/* ===== HEADER & NAVIGATION ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(17, 17, 17, 0.9);
    backdrop-filter: blur(10px);
    transition: background-color 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--heading-color);
    text-decoration: none;
}

.logo span {
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-color);
    transition: all 0.3s ease-in-out;
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.hero-content h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
}

.hero-content h1 {
    font-size: 3.5rem;
    color: var(--heading-color);
    margin: 10px 0;
}

.hero-content h4 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.hero-content p {
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.hero-image img {
    width: 100%;
    max-width: 400px;
    border-radius: 20px;
    margin: 0 auto;
    display: block;
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

/* ===== ABOUT SECTION ===== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
}

.about-info {
    margin-top: 30px;
}

.info-item {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
}

.info-item span {
    color: var(--primary-color);
    font-weight: 600;
    min-width: 80px;
}

.skills h3 {
    color: var(--heading-color);
    margin-bottom: 20px;
}

.skill-item {
    margin-bottom: 15px;
}

.skill-item span {
    display: block;
    margin-bottom: 5px;
}

.skill-bar {
    width: 100%;
    height: 10px;
    background-color: #333;
    border-radius: 10px;
    overflow: hidden;
}

.skill-level {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 10px;
    transition: width 1s ease;
}

/* ===== SERVICES SECTION ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background-color: #1a1a1a;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid transparent;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
    border-color: var(--primary-color);
}

.service-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    color: var(--heading-color);
    margin-bottom: 15px;
}

/* ===== PORTFOLIO SECTION ===== */
.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.filter-btn {
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 20px;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.filter-btn.active, .filter-btn:hover {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    cursor: pointer;
}

.portfolio-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 212, 255, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

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

.portfolio-overlay h4 {
    color: var(--secondary-color);
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.portfolio-overlay p {
    color: var(--secondary-color);
    font-weight: 600;
}

.portfolio-overlay a {
    color: var(--secondary-color);
    font-size: 2rem;
    margin-top: 10px;
}

/* ===== CONTACT SECTION ===== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    color: var(--heading-color);
    margin-bottom: 15px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    margin: 30px 0;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.contact-item h4 {
    color: var(--heading-color);
    margin-bottom: 5px;
}

.social-links {
    margin-top: 30px;
    display: flex;
    gap: 15px;
}

.social-links a {
    color: var(--text-color);
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--primary-color);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    background-color: #1a1a1a;
    border: 1px solid #333;
    border-radius: 5px;
    color: var(--text-color);
    font-family: inherit;
    resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* ===== FOOTER ===== */
footer {
    background-color: var(--secondary-color);
    text-align: center;
    padding: 30px 0;
    border-top: 1px solid #333;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 992px) {
    .hero-container, .about-content, .contact-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-image {
        order: -1;
    }
    .hero-buttons {
        justify-content: center;
    }
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--background-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 20px 0;
    }
    .nav-menu.active {
        left: 0;
    }
    .hero-content h1 {
        font-size: 2.8rem;
    }
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .section-title {
        font-size: 2rem;
    }
    .services-grid {
        grid-template-columns: 1fr;
    }
    .portfolio-filters {
        flex-wrap: wrap;
    }
}