/* --- RESET & VARIABLES --- */
:root {
    --primary: #0F172A; /* Deep Navy */
    --secondary: #1E293B; /* Lighter Navy */
    --accent: #D97706; /* Industrial Amber */
    --text-light: #F8FAFC;
    --text-dark: #334155;
    --white: #ffffff;
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Manrope', sans-serif; line-height: 1.6; color: var(--text-dark); background-color: var(--text-light); }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* --- UTILITIES --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.btn {
    display: inline-block; padding: 12px 30px; font-weight: 600; border-radius: 4px;
    cursor: pointer; transition: var(--transition); text-transform: uppercase; font-size: 0.9rem; letter-spacing: 0.5px;
}
.btn-primary { background: var(--accent); color: var(--white); border: 2px solid var(--accent); }
.btn-primary:hover { background: transparent; color: var(--accent); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid var(--white); margin-left: 10px; }
.btn-outline:hover { background: var(--white); color: var(--primary); }

/* --- NAVBAR --- */
.navbar { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; padding: 20px 0; transition: var(--transition); background: transparent; }
.navbar.sticky { background: var(--primary); padding: 15px 0; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.5rem; font-weight: 800; color: var(--white); letter-spacing: -1px; }
.logo .highlight { color: var(--accent); }
.nav-links { display: flex; align-items: center; }
.nav-links li { margin-left: 30px; }
.nav-links a { color: var(--white); font-size: 0.95rem; font-weight: 500; transition: var(--transition); }
.nav-links a:hover { color: var(--accent); }
.btn-nav { border: 1px solid var(--white); padding: 8px 20px; border-radius: 4px; }
.btn-nav:hover { background: var(--accent); border-color: var(--accent); }
.hamburger { display: none; color: var(--white); font-size: 1.5rem; }

/* --- HERO --- */
.hero {
    height: 100vh;
    /* Updated Image: Oil Refinery / Industrial Complex */
    background: url('https://images.pexels.com/photos/257700/pexels-photo-257700.jpeg?auto=compress&cs=tinysrgb&w=1600') no-repeat center center/cover;
    display: flex; 
    align-items: center; 
    position: relative; 
    color: var(--white);
}
.overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(to right, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.7)); }
.hero-content { position: relative; z-index: 2; max-width: 700px; }
.hero-tag {
    display: inline-block; background: rgba(255,255,255,0.1); padding: 5px 15px; border-radius: 50px;
    font-size: 0.8rem; font-weight: 600; margin-bottom: 20px; color: var(--accent); border: 1px solid rgba(217, 119, 6, 0.3);
}
.hero h1 { font-size: 3.5rem; line-height: 1.1; margin-bottom: 20px; font-weight: 800; }
.hero p { font-size: 1.2rem; color: #cbd5e1; margin-bottom: 30px; }

/* --- SECTIONS GENERAL --- */
.section { padding: 100px 0; }
.section-header { text-align: center; max-width: 600px; margin: 0 auto 60px; }
.section-header h2 { font-size: 2.5rem; color: var(--primary); margin-bottom: 15px; }
.section-header p { color: var(--text-dark); }

/* --- EXPERTISE (CARDS) --- */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.card {
    background: var(--white); padding: 40px; border-radius: 8px; box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: var(--transition); border-top: 3px solid transparent;
}
.card:hover { transform: translateY(-5px); border-top: 3px solid var(--accent); box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
.icon { font-size: 2.5rem; color: var(--accent); margin-bottom: 20px; }
.card h3 { margin-bottom: 15px; color: var(--primary); }
.card p { color: var(--text-dark); font-size: 0.95rem; }

/* --- SECTORS (UPDATED - NO MAP) --- */
.dark-bg { background: var(--secondary); color: var(--white); }
.dark-bg h2 { color: var(--white); }
.dark-bg p { color: #94a3b8; }

.sector-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.sector-item {
    background: rgba(255,255,255,0.03);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.05);
    transition: var(--transition);
}

.sector-item:hover {
    background: rgba(255,255,255,0.06);
    border-color: var(--accent);
}

.sector-icon {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 15px;
    display: block;
}

.sector-text strong {
    display: block;
    font-size: 1.25rem;
    color: var(--white);
    margin-bottom: 8px;
}

.sector-text small {
    font-size: 0.95rem;
    color: #94a3b8;
}

/* --- STATS --- */
.stats { background: var(--primary); padding: 60px 0; color: var(--white); border-top: 1px solid rgba(255,255,255,0.1); }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; text-align: center; }
.stat-item h3 { font-size: 2.5rem; color: var(--accent); margin-bottom: 5px; }
.stat-item p { font-size: 0.9rem; letter-spacing: 1px; text-transform: uppercase; color: #94a3b8; }

/* --- CONTACT --- */
.contact-card {
    background: var(--primary); color: var(--white); padding: 80px 40px; border-radius: 12px;
    text-align: center; box-shadow: 0 10px 40px rgba(0,0,0,0.1); max-width: 800px; margin: 0 auto;
}
.contact-card h2 { font-size: 2.5rem; margin-bottom: 15px; }
.contact-card p { color: #94a3b8; margin-bottom: 40px; }
.contact-details { display: flex; justify-content: center; gap: 40px; margin-bottom: 40px; flex-wrap: wrap; }
.detail-box { display: flex; align-items: center; gap: 10px; font-size: 1.1rem; }
.detail-box i { color: var(--accent); }

/* --- FOOTER --- */
footer { background: var(--secondary); color: #64748b; padding: 30px 0; font-size: 0.9rem; }
.footer-content { display: flex; justify-content: space-between; align-items: center; }
.footer-brand h4 { color: var(--white); margin-bottom: 5px; }
.footer-links a { margin-left: 20px; transition: var(--transition); }
.footer-links a:hover { color: var(--accent); }

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hamburger { display: block; cursor: pointer; }
    .hero h1 { font-size: 2.5rem; }
    .footer-content { flex-direction: column; text-align: center; gap: 20px; }
}