:root {
    --primary: #007bff;
    --dark: #1a1a1a;
    --light: #f4f4f4;
    --grey: #333;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
}

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--dark);
    color: white;
    padding: 1rem 5%;
    position: sticky;
    top: 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.logo { font-weight: bold; font-size: 1.2rem; }
.links a { color: white; text-decoration: none; margin-left: 20px; }
.links a:hover { color: var(--primary); }

/* Header */
header {
    background: linear-gradient(135deg, #1a1a1a 0%, #2c3e50 100%);
    color: white;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-text h1 { font-size: 3rem; margin-bottom: 0.5rem; }
.highlight { color: var(--primary); }
.btn {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 20px;
}

/* Sections */
section { padding: 60px 20px; max-width: 900px; margin: auto; }
h2 { text-align: center; margin-bottom: 40px; color: var(--dark); }

/* Cards */
.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
.card { background: white; padding: 20px; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }

/* Form */
form { max-width: 500px; margin: auto; background: white; padding: 30px; border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.form-group { margin-bottom: 15px; }
label { display: block; margin-bottom: 5px; font-weight: bold; }
input, textarea { width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 4px; box-sizing: border-box;} 
button { width: 100%; padding: 10px; background: var(--dark); color: white; border: none; cursor: pointer; font-size: 1rem; }
button:hover { background: var(--primary); }

footer { background: var(--dark); color: white; text-align: center; padding: 20px; margin-top: 50px; }

/* Mobile */
@media (max-width: 768px) {
    .hero-text h1 { font-size: 2rem; }
}