/* --- Base & Variables --- */
:root {
    --bg-color: #f8f9fa;
    --text-color: #212529;
    --primary-color: #00796b; /* Teal from your logo */
    --secondary-color: #4db6ac;
    --header-bg: #ffffff;
    --card-bg: #ffffff;
    --border-color: #dee2e6;
    --shadow-color: rgba(0,0,0,0.08);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.7;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Header --- */
.main-header {
    background-color: var(--bg-secondary, var(--header-bg));
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--accent, var(--primary-color));
    font-weight: bold;
    font-size: 24px;
}

.brand img {
    height: 40px;
    margin-right: 12px;
}

.main-nav {
    display: flex;
    align-items: center;
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
}

.main-nav li {
    margin-left: 30px;
}

.main-nav a {
    text-decoration: none;
    color: var(--text-primary, var(--text-color));
    font-weight: 500;
    padding-bottom: 5px;
    border-bottom: 2px solid transparent;
    transition: color 0.3s, border-bottom-color 0.3s;
}

.main-nav a:hover {
    color: var(--accent, var(--primary-color));
    border-bottom-color: var(--accent, var(--primary-color));
}

/* --- Sections & Cards --- */
section {
    padding: 60px 0;
}

.card, .project-card, .service-card, .t-card {
    background-color: var(--bg-secondary, var(--card-bg));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 15px var(--shadow, var(--shadow-color));
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover, .project-card:hover, .service-card:hover, .t-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0,0,0,0.1);
}

.projects-grid, .services .row, .testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

/* --- Hero Section --- */
.hero {
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    padding: 80px 20px;
}

.hero h1 {
    font-size: 48px;
    color: #fff;
}

/* --- Forms --- */
input, textarea, select {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    box-sizing: border-box;
}

.btn, button {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    padding: 15px 25px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(0, 121, 107, 0.3);
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover, button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 121, 107, 0.4);
}

/* --- Logos Marquee --- */
.logos {
    padding: 40px 0;
}
.marquee {
    overflow: hidden;
    position: relative;
}
.marquee-track {
    display: flex;
    width: max-content;
    animation: marquee 40s linear infinite;
}
.marquee-track img {
    height: 40px;
    max-height: 40px;
    width: auto;
    margin: 0 30px;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all 0.3s;
}
.marquee-track img:hover {
    filter: grayscale(0%);
    opacity: 1;
}
@keyframes marquee {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* --- Mobile Responsiveness --- */
#mobile-menu-toggle {
    display: none; /* Hidden by default */
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger-icon {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    position: relative;
}
.hamburger-icon::before, .hamburger-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: var(--primary-color);
    left: 0;
    transition: transform 0.3s, top 0.3s, bottom 0.3s;
}
.hamburger-icon::before { top: -8px; }
.hamburger-icon::after { bottom: -8px; }

@media (max-width: 768px) {
    .header-container {
        justify-content: space-between;
    }
    .main-nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px; /* Match header height */
        left: 0;
        width: 100%;
        background-color: var(--bg-secondary, var(--header-bg));
        box-shadow: 0 5px 10px var(--shadow, rgba(0,0,0,0.1));
    }
    .main-nav ul.show {
        display: flex;
    }
    .main-nav li {
        margin: 0;
        width: 100%;
    }
    .main-nav a {
        display: block;
        padding: 15px;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    #mobile-menu-toggle {
        display: block;
    }
    .lang-switcher-li {
        padding: 10px 0;
        display: flex;
        justify-content: center;
    }
}