:root {
    /* Color Palette - Premium & Professional */
    --primary-color: #0b1120;
    /* Very dark blue/black */
    --secondary-color: #151e32;
    /* Rich navy */
    --accent-color: #38bdf8;
    /* Sky blue */
    --accent-glow: rgba(56, 189, 248, 0.3);
    --text-light: #f1f5f9;
    --text-muted: #94a3b8;
    --white: #ffffff;
    --glass-bg: rgba(21, 30, 50, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --card-hover: #1e293b;

    /* Typography */
    --font-main: 'Inter', sans-serif;
    --font-heading: 'Outfit', sans-serif;

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--primary-color);
    color: var(--text-light);
    line-height: 1.7;
    overflow-x: hidden;
    background-image:
        radial-gradient(circle at 10% 20%, rgba(56, 189, 248, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(56, 189, 248, 0.05) 0%, transparent 20%);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--white);
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

section {
    padding: 6rem 10%;
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Utility Classes */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, var(--accent-color), #0ea5e9);
    color: var(--primary-color);
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 4px 15px var(--accent-glow);
    border: none;
    font-size: 1rem;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--accent-glow);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    margin-left: 1rem;
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--accent-glow);
    color: var(--white);
    box-shadow: 0 0 15px var(--accent-glow);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--accent-color);
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* Scroll Animation Classes */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    will-change: opacity, visibility;
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: none;
}


/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 10%;
    z-index: 1000;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

header.scrolled {
    background: rgba(11, 17, 32, 0.9);
    padding: 1rem 10%;
    border-bottom: 1px solid var(--glass-border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
}

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

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

.nav-links li a {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
}

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

.btn-nav {
    padding: 0.5rem 1.5rem;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
}

.btn-nav:hover {
    border-color: var(--accent-color);
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--text-light);
    cursor: pointer;
}

/* Hero Section */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 8rem;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h3 {
    color: var(--accent-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.hero-text h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text h2 {
    font-size: 2rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 2rem;
}

.hero-text p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 3rem;
    max-width: 500px;
}

.hero-img-styled {
    width: 100%;
    max-width: 600px;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--glass-border);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-20px);
    }

    100% {
        transform: translateY(0px);
    }
}

/* About Section */
.about-content {
    background: var(--glass-bg);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--secondary-color);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--glass-border);
    transition: var(--transition);
}

.skill-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.skill-card h3 {
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

.skill-card ul li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-muted);
}

.skill-card ul li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--secondary-color);
    padding: 2.5rem;
    border-radius: 15px;
    border: 1px solid var(--glass-border);
    transition: var(--transition);
    text-align: center;
}

.service-card:hover {
    background: var(--card-hover);
    transform: translateY(-5px);
}

.service-card .icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--secondary-color);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-color);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

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

/* Contact */
.contact-wrapper {
    background: var(--glass-bg);
    padding: 4rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info {
    margin: 2rem 0;
    color: var(--text-muted);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.social-links a {
    font-size: 1.8rem;
    color: var(--text-muted);
    transition: var(--transition);
    display: inline-block;
}

.social-links a:hover {
    color: var(--accent-color);
    transform: translateY(-5px);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 500px;
    margin: 0 auto;
}

.contact-form input,
.contact-form textarea {
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-light);
    font-family: var(--font-main);
}

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

.form-message {
    margin-top: 1rem;
    font-size: 0.95rem;
    font-weight: 500;
    text-align: center;
    color: var(--accent-color);
    display: none;
}

footer {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    border-top: 1px solid var(--glass-border);
    margin-top: 4rem;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    section {
        padding: 4rem 5%;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 3rem;
    }

    .hero-btns {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .btn-outline {
        margin-left: 0;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--secondary-color);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        transform: translateY(-150%);
        transition: var(--transition);
        z-index: 999;
    }

    .nav-links.active {
        transform: translateY(0);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }
}