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

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #0f172a;
    color: white;
    padding: 40px;
}

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

h1 {
    text-align: center;
    margin-bottom: 10px;
    font-size: 42px;
}

.subtitle {
    text-align: center;
    color: #94a3b8;
    margin-bottom: 50px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px,1fr));
    gap: 20px;
}

.card {
    background: #1e293b;
    border-radius: 15px;
    padding: 25px;
    transition: .3s;
    border: 1px solid #334155;
}

.card:hover {
    transform: translateY(-8px);
    border-color: #38bdf8;
}

.card h2 {
    color: #38bdf8;
    margin-bottom: 10px;
}

.section-title {
    margin: 50px 0 20px;
    text-align: center;
    font-size: 30px;
}

.buttons {
    text-align: center;
    margin-top: 30px;
}

button {
    background: #38bdf8;
    color: white;
    border: none;
    padding: 15px 25px;
    margin: 10px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 17px;
    transition: .3s;
}

button:hover {
    background: #0ea5e9;
}

#result {
    margin-top: 30px;
    text-align: center;
    font-size: 20px;
    color: #22c55e;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
}

.badge {
    background: #2563eb;
    padding: 12px 20px;
    border-radius: 25px;
    font-weight: bold;
}

footer {
    text-align: center;
    margin-top: 70px;
    color: gray;
}