/* 전체 배경 설정 - 이미지 없이 CSS 패턴으로 구현 */
body {
    margin: 0;
    padding: 0;
    font-family: 'Arial', sans-serif;
    
    /* 마인크래프트 흙(Dirt) 블록 느낌의 CSS 패턴 */
    background-color: #4d3225;
    background-image: 
        linear-gradient(30deg, #3d281d 12%, transparent 12.5%, transparent 87%, #3d281d 87.5%, #3d281d),
        linear-gradient(150deg, #3d281d 12%, transparent 12.5%, transparent 87%, #3d281d 87.5%, #3d281d),
        linear-gradient(30deg, #3d281d 12%, transparent 12.5%, transparent 87%, #3d281d 87.5%, #3d281d),
        linear-gradient(150deg, #3d281d 12%, transparent 12.5%, transparent 87%, #3d281d 87.5%, #3d281d),
        linear-gradient(60deg, #5a3a2a 25%, transparent 25.5%, transparent 75%, #5a3a2a 75.5%, #5a3a2a),
        linear-gradient(60deg, #5a3a2a 25%, transparent 25.5%, transparent 75%, #5a3a2a 75.5%, #5a3a2a);
    background-size: 80px 140px;
    background-position: 0 0, 0 0, 40px 70px, 40px 70px, 0 0, 40px 70px;
    
    color: #ffffff;
}

header {
    background-color: #388e3c; /* 잔디 초록색 */
    color: white;
    text-align: center;
    padding: 50px 20px;
    border-bottom: 10px solid #2e7d32; /* 흙과 닿는 진한 초록색 경계 */
    box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}

.logo {
    font-size: 3rem;
    font-weight: bold;
    text-shadow: 4px 4px #000;
}

main {
    max-width: 900px;
    margin: 40px auto;
    padding: 30px;
    /* 배경 패턴 위에서 글자가 잘 보이게 하는 반투명 검은 판 */
    background: rgba(0, 0, 0, 0.8); 
    border-radius: 5px;
    border: 2px solid #555;
}

/* 카드 디자인 (아이템 슬롯 느낌) */
.card-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 25px;
}

.card {
    background-color: #444;
    border: 4px solid #111;
    padding: 20px;
    flex: 1;
    min-width: 240px;
    text-align: center;
    cursor: pointer;
    transition: 0.2s;
}

.card:hover {
    background-color: #555;
    border-color: #8bc34a;
    transform: translateY(-5px);
}

.card-icon {
    font-size: 50px;
    margin-bottom: 15px;
}

/* 모달창 (마인크래프트 UI 느낌) */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.9);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: #c6c6c6; /* 마인크래프트 인벤토리 회색 */
    color: #000;
    padding: 30px;
    border: 5px solid #555;
    border-top-color: #fff;
    border-left-color: #fff;
    max-width: 400px;
    width: 85%;
    text-align: center;
}

.close-modal-btn {
    margin-top: 20px;
    padding: 12px;
    background: #777;
    color: white;
    border: 3px solid #000;
    cursor: pointer;
    font-weight: bold;
}