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

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #131313;
    color: #e8e8e8;
    line-height: 1.5;
}

/* HEADER */
header {
    background: #0d0d0d;
    border-bottom: 3px solid #3a3a3a;
}

.banner {
    width: 100%;
    height: 250px;
    background: url("banner.png") center/auto no-repeat;
}

/* MENU */
nav {
    display: flex;
    justify-content: center;
    gap: 40px;
    padding: 14px 0;
}

nav a {
    text-decoration: none;
    font-weight: 600;
    color: #e8e8e8;
    padding: 6px 10px;
    border-radius: 6px;
    transition: 0.2s;
}

nav a:hover {
    background: #fdb813;
    color: #000;
}

nav a.active {
    border-bottom: 3px solid #fdb813;
}

/* MAIN CONTAINER */
.container {
    width: min(1000px, 90%);
    margin: 40px auto;
}

/* HEADING STYLE */
h1, h2, h3 {
    font-weight: 700;
    margin-bottom: 12px;
}

/* OFERTA */
.cards {
    display: grid;
    gap: 25px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    margin-top: 20px;
}

.card {
    background: #1b1b1b;
    border: 2px solid #444;
    padding: 16px;
    border-radius: 8px;
    box-shadow: 0 0 6px #000;
}

.card img {
    width: 100%;
    object-fit: cover;
    height: 350px;
    border-radius: 6px;
    margin-bottom: 12px;
}

/* FORMULARZ */
form {
    max-width: 600px;
    margin: 25px auto;
    background: #1b1b1b;
    padding: 20px;
    border-radius: 8px;
    border: 2px solid #444;
}

label {
    font-weight: 600;
    margin-top: 12px;
    display: block;
}

input, textarea {
    width: 100%;
    margin-top: 6px;
    padding: 10px;
    border-radius: 6px;
    border: 2px solid #333;
    background: #0f0f0f;
    color: #e8e8e8;
}

textarea {
    min-height: 130px;
}

/* BUTTON */
button {
    margin-top: 16px;
    padding: 10px 18px;
    font-weight: 600;
    border-radius: 6px;
    border: 2px solid #000;
    background: #fdb813;
    color: #000;
    cursor: pointer;
    transition: 0.2s;
}

button:hover {
    transform: translateY(-2px);
}

/* FOOTER */
footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 60px;
    color: #777;
    font-size: 14px;
}

/* RESPONSYWNE */
@media(max-width: 600px){
    .banner { height: 140px; }
    nav { gap: 20px; flex-wrap: wrap; }
}