:root {
    --primary-color: #4CAF50;
    --secondary-color: #66BB6A;
    --background-color: #121212;
    --text-color: #ffffff;
    --transparent-white: rgba(255, 255, 255, 0.8);
    --transparent-black: rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    background-color: var(--background-color);
    overflow-x: hidden;
}

/* --- Antet --- */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    z-index: 100;
    background-color: var(--transparent-black);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background-color 0.3s ease;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    text-decoration: none; /* Elimină linia de subliniere pentru link */
}

.logo:focus {
    outline: none; /* Elimină conturul la click */
}

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

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    transition: color 0.3s ease;
}

.main-nav a:hover {
    color: var(--primary-color);
}

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

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

/* --- Secțiunea principală "Hero" --- */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--text-color);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.8) 100%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
    padding: 2rem;
    animation: fadeIn 1.5s ease-in-out;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--primary-color);
    color: var(--background-color);
    text-decoration: none;
    font-weight: 600;
    border-radius: 50px;
    transition: transform 0.3s ease, background-color 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.cta-button:hover {
    transform: translateY(-5px);
    background-color: var(--secondary-color);
}

/* --- Animații --- */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Responisvitate --- */
@media (max-width: 768px) {
    .main-header {
        flex-direction: column;
        padding: 1.5rem 5%;
        background-color: var(--background-color);
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }
    
    .main-nav {
        margin-top: 1rem;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1rem;
    }
}