:root {
    --primary: #0a192f;
    --accent: #f39c12;
    --light: #f4f7f6;
    --white: #ffffff;
    --text: #333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    line-height: 1.6;
    color: var(--text);
    background-color: var(--white);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: var(--primary);
    color: white;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo { font-size: 1.5rem; font-weight: bold; }
.logo span { color: var(--accent); }

.nav-links { display: flex; list-style: none; align-items: center; }
.nav-links li { margin-left: 2rem; }
.nav-links a { color: white; text-decoration: none; transition: 0.3s; }
.nav-links a:hover { color: var(--accent); }

/* Hero */
.hero {
    height: 80vh;
    background: linear-gradient(rgba(10, 25, 47, 0.8), rgba(10, 25, 47, 0.8)), 
                url('https://images.unsplash.com/photo-1550751827-4bd374c3f58b?auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero-content h1 { font-size: 3rem; margin-bottom: 1rem; }
.hero-content p { font-size: 1.2rem; margin-bottom: 2rem; max-width: 700px; }

/* Buttons */
.btn-primary { background: var(--accent); color: white; padding: 0.8rem 1.5rem; border-radius: 5px; text-decoration: none; border: none; cursor: pointer; }
.btn-secondary { border: 2px solid white; color: white; padding: 0.7rem 1.5rem; border-radius: 5px; text-decoration: none; margin-right: 1rem; }

/* Sections & Grid */
.section { padding: 5rem 10%; }
.section-title { text-align: center; margin-bottom: 3rem; font-size: 2rem; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.card {
    padding: 2rem;
    background: var(--light);
    border-top: 5px solid var(--accent);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.hardware-bg { background-color: var(--primary); color: white; }
.hardware-list { list-style: none; margin: 2rem 0; }
.hardware-list li { margin-bottom: 0.5rem; }

/* Forms */
form { display: flex; flex-direction: column; max-width: 500px; margin: 0 auto; }
form input, form select, form textarea { margin-bottom: 1rem; padding: 0.8rem; border: 1px solid #ccc; border-radius: 5px; }
footer { text-align: center; padding: 2rem; background: #050c16; color: white; }