:root {
    --primary-color: #000000;
    --secondary-color: #86868b;
    --accent-color: #0066cc;
    --light-text: #f5f5f7;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background-color: #000;
    color: var(--light-text);
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(to right, #0066cc, #00ff99);
    z-index: 1001;
}

/* Navigation */
.navbar {
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    padding: 0.8rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav-links {
    display: flex;
    justify-content: center;
    list-style: none;
    max-width: 1000px;
    margin: 0 auto;
}

.nav-links li {
    margin: 0 1.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--light-text);
    font-size: 0.85rem;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 1;
}

/* Hero Section */
.hero {
    height: 100vh;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-background::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../img/back_img.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: brightness(0.7);
    animation: scale 20s infinite alternate;
    transform: translateZ(0);
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
    padding: 0 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-content h1 {
    font-size: 4.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #ffffff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-content p {
    font-size: 1.5rem;
    color: #ffffff;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.logo {
    width: 150px;
    height: auto;
    margin-bottom: 20px;
    animation: floating 3s infinite ease-in-out;
}

/* General Section */
section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 80px 10% 40px;
}

/* Footer */
footer {
    background-color: #000;
    padding: 2rem 5%;
    text-align: center;
}

.social-icons {
    margin: 1.5rem 0;
}

.social-icons i {
    margin: 0 1rem;
    font-size: 1.5rem;
    color: var(--secondary-color);
    transition: color 0.3s;
}

.social-icons i:hover {
    color: var(--light-text);
}

/* Animations */
@keyframes scale {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

@keyframes floating {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-content p {
        font-size: 1.2rem;
    }

    .nav-links {
        display: none;
    }
}